KKS Reference

s

Identification System for Power Plants

Equipment Unit and Component Code Reference List

(Edition 1990)

Siemens Power Generation

VGB Technical Commitee on Technical Classification Systems

KKS

Identification System for Power Stations List of Terms

List of Terms all terms sorted alphabetically Description

Equipment Component unit key key

Absolute dose measuring circuits Absolute pressure measuring circuits Absorbed doserate measuring circuits Absorber assemblies Absorber assemblies, burnable Absorber vessels Absorbers Absorbers (for cooling) Absorbers (for separating materials) Absorption refrigerators Absorptive filters Absorptive silencers Acceleration measuring circuits Accumulators Acoustic enclosures (dedicated removable unit) Acoustic signaling devices Acoustic transducers Active filters (electrical) Activity measuring circuits Actuating equipment (non electrical) Actuating equipment for electrical variables Actuators (electrical, oscillatory) Actuators (electrical, rotary) Actuators (non- electrical, rotary) Actuators (non electrical, oscillatory) Adjustable foundations Adjustable orifices Adjustable resistors (electrical) Adjusting equipment, not for electrical variables Adjusting valves Admittance, conductance, susceptance measuring circuits Aerials Agitators Air- conditioning units Air blowers (for compressing purposes) Air blowers (for conveying purposes) Air classifiers (physical separator) Air ejectors Air engines Air filters Air heaters Air inlet valves Air lift tanks Air pressure (atmospheric) measuring circuits Air pumps Air soot blowers (for cleaning purposes) Air turbines Air- vane relays Airlocks Alarm annunciation equipment Alarm devices (non- electrical) Amplifier valves Amplifiers (electrical)

CX CP CX JA JE AT AT AC AT AH AT BS CS BB BU

st

1 Edition 1990

KT KT KC

KT

KD -H -B -Z

CR AS GX

BF

AS AA CE

-Y -M MM MS MF KA -R KA -W KM

AH AN AF AT BN

AC AA BB CP AN AT

KN KF KT MM KT KC KA KD KN KT MT -F

AB -H QH -V -N

Page 1 of 29

VGB Technical Committee on Technical Classification Systems

KKS

Description

Equipment Component unit key key

Amplifiers, with valves or transistors (as assemblies) Analog comparators Analog computers Analog controllers Analog input/output devices Analog signal conditioning equipment for computers (EM- EQ available) Analog signal conditioning equipment for computers (EM- EQ available) Analog signal conditioning equipment for computers (EM- EQ available) Analog signal conditioning equipment for computers (EM- EQ available) Analog signal conditioning equipment for controls (EA- EE available) Analog signal conditioning equipment for controls (EA- EE available) Analog signal conditioning equipment for controls (EA- EE available) Analog signal conditioning equipment for controls (EA- EE available) Analog signal conditioning equipment for controls (EA- EE available) Analog signal conditioning equipment for protection (EW- EZ available) Analog signal conditioning equipment for protection (EW- EZ available) Analog signal conditioning equipment for protection (EW- EZ available) Analog signal conditioning equipment for protection (EW- EZ available) Analog signal conditioning equipment for reactor protection Analog signal conditioning equipment for signaling (EG- EK available) Analog signal conditioning equipment for signaling (EG- EK available) Analog signal conditioning equipment for signaling (EG- EK available) Analog signal conditioning equipment for signaling (EG- EK available) Analog signal conditioning equipment, combined Analog timers (integr., diff., delay) Analog- to- digital converters (frequency, voltage, current) Analog, binary & digital indication & recording measuring instruments Analytical control circuits, except DD, DM, DV Analytical measuring circuits, except CD, CM, CV Analytical measuring circuits, indirect, except FD, FM, FV Analytical measuring instruments (non- electrical) Analytical sensors (electrical) Analytical transducers Angle measuring circuits Angle transducers Angular velocity measuring circuits Antennae Apron conveyor belts Apron conveyors Arcing chambers Area measuring circuits Articulated shafts Assemblies of equipment (electrical) Asynchronous motors Attachments - see supports Automatic cut outs Automatic drains traps Auxiliary contractors Auxiliary relays Axial- flow blowers Axial- flow compressors Axial- flow fans Backup burners Baffle separators Baffles (flow guides) Balanced- beam relays Page 2 of 29

Identification System for Power Stations List of Terms

st

1 Edition 1990

-A -N -N -N -N EM EN EP EQ EA EB EC ED EE EW EX EY EZ ER EG EH EJ EK EU -N -U -P DQ CQ FQ QP -B -B CG -B CS -W AF KF -F CG MU -A -M

AA

AN AN AN AV

-F KA -K -K KN KN KN KV KT MR -K

VGB Technical Commitee on Technical Classification Systems

KKS

Description

Identification System for Power Stations List of Terms Equipment Component unit key key

Balancing equipment (electrical) Balancing machines Balers (packaging) Ball mills Ball valves Band brakes Band clutches Band filters Bar screens Barometers Barriers Base supports Basins Batteries Batteries Battery condition sensors Battery racks Bearing assemblies (for main and heavy machinery) Beater mills Beater wheel mills Bellows expansion joints (for piping) Bells Belt cleaning equipment Belt conveyors Belt drives Bending machines Bending moment measuring circuits Bifurcated terminals Bifurcated transformers Bimetallic trips Binary elements Binary status indicators Bistables Blank flanges Blanks Blinds Block and tackle (permanently installed) Blockers Blower units Blowers Boiler circulation pumps Boiler drums Boiling point measuring circuits Bolted couplings Brake motors Brake operators (magnetic) Brake resistors Brake units Brakes Braking equipment Breakers Breeder assemblies Bridge cranes Bridge rectifiers Broaching machines (machine tools) Brush cleaning equipment

st

1 Edition 1990

AW AJ AA

AT AT AB BQ

-Z KW KK KJ KA MB MK KT KT QP KB KD -G

GR -B GZ HD AJ AJ

AT AF AW CW

AB AE AN AN AP BB CQ

KJ KJ MR -H KT KF MU KW -Z -Z -F -D -P -B KA KA KB KE -D

KP

MK -M -Y -R AU MB AU AJ JC AE AW AT

KJ

-V KW

Page 3 of 29

VGB Technical Committee on Technical Classification Systems

KKS

Identification System for Power Stations List of Terms

Description

Equipment Component unit key key

Buchholz relay measuring circuits (pretrip alarm, trip) Buchholz relays Bucket conveyors Bucket elevators Buckets Buffer amplifiers Built- in equipment Built- in heaters (electrical) Built- in heaters (non- electrical) Bulkhead walls Bulkheads Burglar alarm boxes Burners Busbars (electrical) Buses Butterfly valves Buzzers Cabinet- mounted switchgear (electrical) Cabinet power supply equipment Cable penetrations (GA- GG for us as required) Cable penetrations (GA- GG for us as required) Cable penetrations (GA- GG for us as required) Cable penetrations (GA- GG for us as required) Cable penetrations (GA- GG for us as required) Cable penetrations (GA- GG for us as required) Cable penetrations (GA- GG for us as required) Cable plugs Cable racks Cable simulation networks Cable terminations Cables Calcinating kilns Calculation equipment (root- extraction, multiplication, division) Calorific value measuring circuits (HHV) Calorific value measuring circuits (LHV) Capacitance measuring circuits Capacitors Cartridge filters Cartridge- type heaters Cascade coolers Casting machines Catalytic converters Cathode ray tubes Centrifugal clutches Centrifugal compressors (axial and radial flow) Centrifugal fans (axial and radial flow) Centrifugal pumps (axial, mixed- flow and radial flow) Centrifugal switches (electrical) Centrifuges Chain conveyors Chain drives Changing equipment Channel sections Channels Chargers Chillers

CE

Page 4 of 29

st

1 Edition 1990

AF AF

-F KF KF KF -N -S -E KC KB

AB

AA

-H KV -W -W KA -H -Q

GW GA GB GC GD GE GF GG -X GZ -Z -Z -W AW -N CQ CQ CE

AC AW

AN AN AP AT AF

-C KT -E KC KW KT -V MK KN KN KP -F KT KF MU

AE MR BR GU AH

VGB Technical Commitee on Technical Classification Systems

KKS

Description

Identification System for Power Stations List of Terms Equipment Component unit key key

Chimes Chokes Chutes Chutes (as gullies) Chutes (for conveying) Circular conveyors Circulation pumps Clarifiers Classifiers Claw clutches Cleaning equipment Cleaning machines Clock generators Clock pulse generators Clocks (electrical) Clocks (non- electrical) Closures Clutch units Clutches Coal mills Coaxial cables Coaxial plugs Cocks Code converters Code- operated switches Coding equipment Coil spring couplings Coils Cold air refrigerators - see refrigerators Cold junction compensators (electrical) Combined variables control circuits Combined variables measuring circuits, direct Combined variables measuring circuits, indirect Combustion equipment Command output devices Compacting equipment, only if part of process Compacting machines (packaging) Comparators (electrical) Compressed air engines Compressed air valves Compression refrigerators Compressor units Compressor units Compressors Computers Concentration measuring circuits Concentration transducers (electrical) Concrete Foundations Concrete pipes Concrete vessels Condensation chambers Condensers Conductivity converters Conductivity measuring circuits Conductivity meters Conductivity transducers

st

1 Edition 1990

-H -L MR BR AF AP AT AT

KF KF KP KT MK

AT KT -D -G -P QP AB AU AJ

MK KJ -W -X KA -U -S -U MK -L -P

DU CU FU AV

KV -D

AK

AA AH AN AN AN

KK -D MM KA

KN -N

CQ BF BR BB AC

-B MF MR KD KD KC -B

CQ -B -B

Page 5 of 29

VGB Technical Committee on Technical Classification Systems

KKS

Description

Equipment Component unit key key

Constant hangars Contact- making pressure gauges (electrical) Contact- making pressure gauges (non- electrical) Contact- making thermometers (electrical) Contact- making thermometers (electrical) Contactors (electrical) Contactors (non- electrical switches) Continuous conveyors Control rod - see absorber assembly Control switches Control valve operators (electrical) Control valves Control valves (for instruments) Controllers (electrical) Controllers (non- electrical) Convectors Converter equipment (electrical) Converters (non- electrical) Converters (non- electrical), other than MG and MK Converters from electrical to other electrical variables Converters from non- electrical to electrical variables and vice versa Converters, rotary Conveyor belts Conveyor equipment Conveyors Coolers Cooling equipment Cooling towers (as part of a function) Cooling units Core memories Correcting elements for measured variables Correction capacitors Counter tubes Counters (electrical) Counters (non- electrical) Counting mechanisms Coupling capacitors Coupling elements Coupling units Couplings, clutches Couplings, clutches (as valves) Covers Crane bridges Crane hoists Crane rails Crane trolleys Cranes Criteria indication devices Crossbar distributors Crossbeams Crushers Crushing equipment, only if part of a process Crushing machines Crystal filters (electrical) Crystal transducers Current (voltage) frequency converters Page 6 of 29

Identification System for Power Stations List of Terms

st

1 Edition 1990

AF

AA AA

MU -P QP -P QP -K KB KF -S -Y KA KA -N QN KC

GU AU MU -U -B GU AF AF AF

KF KF KC

AH AC AH -D -D -C -B -P QP QP -C -S AU AA AB AE AE BQ AE AE

MK KA KB

-D -X BQ KJ AJ KJ -Z -B -U

VGB Technical Commitee on Technical Classification Systems

KKS

Description

Identification System for Power Stations List of Terms Equipment Component unit key key

Current limiting coils Current measuring circuits (apparent, active, reactive), electrical Current- operated earth- leakage circuit breakers Current transformers Cutting equipment (part of process) Cutting machines Cyclones Damboards Dampers Damping elements (mechanical) Damping equipment (electrical) Damping equipment (mechanical) Damping resistors (electrical) Dams Data input/output equipment for automation systems Data input/output equipment for process computers Datum reservoirs (in measuring circuits) DC converters DC current transformers DC current/voltage transformers DC generating equipment DC motors DC voltage transformers Decade switches Decanters Decoders Decoding equipment Dehumidifiers Delay devices (electrical) Delay lines Demineralizers (chemical dryers) Demineralizers (filters) Demodulators Density control circuits Density measuring circuits, direct Density measuring circuits, indirect Density measuring instruments (non- electrical) Density sensors (electrical) Density transducers (electrical) Desorber columns Desuperheaters Devices for alarm signaling Devices for analog data storage Devices for limit monitoring Devices for protection Devices for reactor protection Devices for time signaling Dials Diaphragm check valves Diaphragm compressors Diaphragm gate valves Diaphragm isolation valves Diaphragm pressure sensors Diaphragm pumps Diaphragms Diesel engines

st

1 Edition 1990

-L CE -F -T AJ AW AT

KW KB KA MU -Z

BQ AB GK GK

-R KB

QS -G -U -U GR

AT

AT

AT AT

-M -U -S KT -U -U KT -D -D KT KT -U

DD CD FD

AT

AA AN AA AA AP

QP -B -B KT KC -H -N -F -F -F -H -S KA KN KA KA QB KP QB MM

Page 7 of 29

VGB Technical Committee on Technical Classification Systems

KKS

Identification System for Power Stations List of Terms

Description

Equipment Component unit key key

Differential pressure measuring circuits Differential pressure transducers Differentiating filters Differentiators Diffusers Digital computer- based controllers Digital computers Digital controllers Digital equipment Digital pulse shapers Digital- to- analog converters Diode matrix Diodes Dipoles Direct contact heat exchangers Directional joints for hollow waveguides (electrical) Dirt traps Disc brakes Discharge equipment Disconnect plugs Disconnect sockets Disconnecting links (electrical) Discrepancy switches Discriminators Disk memories Distance control circuits Distance measuring circuits, direct Distance measuring circuits, indirect Distance measuring instruments (non- electrical) Distance sensors (electrical) Distance transducers Distillers DNB margin measuring circuits Document readers Doors Dose meter reading devices Dose meters Dosing equipment Dosing pumps Dotted- line recorders Double pipe heat exchangers Double- screw pumps Downcomers Drains traps Drilling machines Driving gear Drop- annunciator relays Drop- indicator relays Drum brakes Drum controllers Drum kilns Drum memories (electrical) Drum mills Dryers Drying equipment Drying presses

CP

Page 8 of 29

st

1 Edition 1990

-B -Z -N BS

AC AT

-D -D -D -D -D -U -D -V -W KC -W KT MB

AF -X -X -Q -S -U -D DG CG FG QP -B -B AT CQ AB

AF AP AP AC AP AT AW AE

AV AJ AT AT

-D KB QP QB KP KP KC KP MR KT KW KE -H -H MB -Q KV -D KJ KT

VGB Technical Commitee on Technical Classification Systems

KKS

Description

Identification System for Power Stations List of Terms Equipment Component unit key key

Ducts Ductwork Ductwork components Duplicating equipment (electrical) Dust collectors Dynamometers Earth fault measuring circuits Earth sounders (level measurement) Earthing bars Earthing disconnectors Earthing equipment Earthing jumpers Earthing switches Eddy current brakes, operators Eddy current braking equipment Edging tools Electric arc welding machines, stationary Electric hoists Electric motor actuators Electric motors Electrical adjusters, not electric motors Electrical and I & C assemblies (black box) Electrical filters Electrical power measuring circuits (apparent, active, reactive) Electrical variables control circuits Electrical variables measuring circuits, direct Electrical variables measuring circuits, indirect Electrical work measuring circuits (apparent, active, reactive) Electro- hydraulic actuators Electromagnetic filters Electromagnetic pumps Electromagnetic separators Electromagnetical operated clutch units Electromagnetical operated clutches, coupling parts Electromagnetical operated clutches, driving parts Electromagnets Electromechanical controllers Electromechanical level measuring circuits Electron tubes Electron valves Electronic and electromechanical controllers Electronic cards Electronic controllers (continuous and discontinuous action) Electronic modules Electronic signal monitoring equipment Electronic switches Electropneumatic actuators Electrostatic precipitators Enclosures Engines (non- electrical) Entalphy measuring circuits Entropy measuring circuits Equalizers (electrical) Ermeto pipe connectors Escalators Evaporators (for separation)

st

1 Edition 1990

MR BR MR BR AT -B CE -B -W -Q GV -X -Q -Y AU AW AW AE

KW

-Y -M -Y GH -Z CE DE CE FE CE -Y AT AP AT AU MK -Y -Y -N CL

AT BU

-V -V -N -A -N -A -F -S -Y KT MM

CU CU CU MR AF AT

KT

Page 9 of 29

VGB Technical Committee on Technical Classification Systems

KKS

Identification System for Power Stations List of Terms

Description

Equipment Component unit key key

Evaporators (heat exchangers) Excursion recorders Expansion control circuits Expansion measuring circuits, direct Expansion measuring circuits, indirect Expansion measuring instruments (non- electrical) Expansion sensors (electrical) Expansion sensors (mechanical) External shoe brakes Extractor units Extractor vessels Extractors (part of air ejector) Extractors (with separate drive) Extreme value selectors Extruders Fan units Fans Fault recorders Fault value recorders Feed heater safety equipment Feed heaters Feeders Field circuit breakers (electrical) Field discharge resistors (electrical) Field strength measuring circuits (electrical) Filter changing equipment Filter elements Filter presses (pressure filtration) Filter vessels Filtering equipment Filters (electrical) Filters (non- electrical) Finned spray coolers Fire alarms Fire alarms Fire breaks Fire dampers Fire extinguishers as equipment units Fire- fighting valves Fire- hose cabinets Fire hydrants Firing equipment Fittings Fixed resistors (electrical) Flag indicators Flags Flame cutting machines Flame detectors Flange couplings Flanged face clutches Flanges Flash tank vessels, other than QS Flash tanks Flasher relays Flexible couplings Float- type flow meters (non- electrical)

AC

Page 10 of 29

st

1 Edition 1990

KC -H

DY CY FY QP -B QB MB AT AT BN AT AF AN

AA AC AF

CE AW

-N KF KN -P -P KA KC KF -Q -R KW KT

AT KD AT

AC

AB AA BB AA BU AA AV

AW

BB

-Z KT KC -B -H KB KA KA

MR -R -H -H KW -F MK MK MR KD KD -K MK QP

VGB Technical Commitee on Technical Classification Systems

KKS

Identification System for Power Stations List of Terms

Description

Equipment Component unit key key

Flocculators Floor gratings Floor supports Flow control circuits Flow controllers (electrical) Flow controllers (non- electrical) Flow diverters Flow indicators (sight glasses) Flow limiters Flow limiters (as valves) Flow limiters (not valves) Flow measuring circuits, direct Flow measuring circuits, indirect Flow metering equipment (non- electrical) Flow meters (non- electrical) Flow meters, inductive Flow meters, ultrasonic Flow monitors Flow nozzles Flow restrictor assemblies (nucl.) Flow restrictor nozzles Flow restrictors (non- electrical) Flow restrictors (not metering orifices) Flow restrictors (nucl.) Flow restrictors, as instrumentation (non- electrical) Flow sensors (electrical) Flow sensors (non- electrical) Flow transducers Flue gas catalytic converter modules Fluid couplings Fluid gears Flyball governors Folding doors Force measuring circuits Forging hammers Forging machines Fouling measuring instruments (non- electrical) Foundations Fractionating columns Freewheeling clutches Frequency changers Frequency control circuits Frequency current converters Frequency demodulators Frequency departure meters Frequency measuring circuits, direct Frequency measuring circuits, indirect Frequency measuring instruments Frequency meters Frequency modulators Frequency scalers Frequency sensors (electrical) Frequency transformers Frequency voltage converters Friction clutches Fuel assemblies

AT BQ

st

1 Edition 1990

MU DF

AA BP CF FF

-B QN MR QP KA KA

QP QP -B -B -F QP JD BP

KA QB

BP JD JD -B QB -B BT

AB CW AW BF AT

MK MG QN KB KW KW QP MF MK -N

DS -U -U -Z CS FS -P -P -U -D -B -U -U MK JB

Page 11 of 29

VGB Technical Committee on Technical Classification Systems

KKS

Description

Equipment Component unit key key

Full disc brakes Fume extractors Function fuses Function generators Function keys Functional group control devices Functional group monitoring devices Fuse boxes Fuse disconnectors Fused load- break switches Fuses Gas analyzers Gas burners Gas circulators Gas cylinder valves Gas cylinders Gas discharge tubes Gas engines Gas injection equipment Gas pilot burners Gas scrubbers Gas stripper columns Gas strippers Gas turbines Gas valves Gates Gating elements Gear pumps Gearbox units Gearboxes Generator units Generators Globe valves Granulating equipment (for size reduction) Granulating equipment (for treatment) Graph calculators Grates Grates (classifying) Grates (combustion equipment) Grid- spring couplings Grinding machines Gripping or lifting gear Group control devices Guard pipes, other than QT Gullies Gullies Hall- effect generators Hall- effect probes Hammer crushers Handling equipment, stationary Handling equipment, stationary for maintenance Hangers Hannemann governors Hatch gates Headers Heat exchange surfaces Page 12 of 29

Identification System for Power Stations List of Terms

st

1 Edition 1990

AN

AV AN AA

AM AV AT

AP AU

MB KN -F -N -S -D -P -F -Q -Q -F QP KV KN KA KD -V MM KV KT KT KT MT KA KB -D KP MG

AG -G KA AJ AW

AV AW

-N KV KT KV MK KW KE -D MR KD

BR

AJ AW BQ AB BB AC

-B -B KJ KW MU QN KB

VGB Technical Commitee on Technical Classification Systems

KKS

Description

Identification System for Power Stations List of Terms Equipment Component unit key key

Heat exchangers Heat flux measuring circuits Heat rate measuring circuits Heat treatment furnaces Heater coils Heater rods Heaters Heaters - see once- trough heaters or feed heaters Heating blankets (electrical) Heating boilers Heating elements (electrical) Heating elements (non- electrical) Heating equipment Heating strips - see trace heaters Heating system circulation pumps Heating units Heating wires Helical compressors High- speed circuit- breakers High, low and band- pass filters Hinged gates Hoisting gear Hoisting mechanisms Hollow waveguides (electrical) Hoods Hoppers Horns Hose connectors Hoses Hot- water boilers Hours- run meters Humidifiers Humidity control circuits Humidity converters (electrical) Humidity measuring circuits, direct Humidity measuring circuits, indirect Humidity measuring instruments (non- electrical) Humidity monitory (electrical) Humidity sensors (electrical) Humidity transducers HV asynchronous motors with squirrel- cage rotor HV circuit breakers HV disconnectors HV switch- disconnectors HV switches HV synchronous motors HVHRC fuses Hydrants Hydraulic couplings Hydraulic motors Hydraulic turbines Igniters Illuminance measuring circuits Illuminated momentary contact push buttons Illuminated switches Impedance converters

st

1 Edition 1990

KC CU CU AW

KW -E -E

AH -E AH -E KC AH AP AH AN

AB AE AE

KP -E KN -Q -Z KB KE KE -W

BU BB -H MR BR AH -P AH DM -B CM FM QP -F -B -B -M -Q -Q -Q -Q -M -F AA MK MM MT -E CR -S -S -N

Page 13 of 29

VGB Technical Committee on Technical Classification Systems

KKS

Description

Equipment Component unit key key

Impulse relays Indexing mechanisms Indicators (electrical) Indicators (non- electrical) Individual control devices Individual printed circuit boards Inductance- capacitance filters Inductance measuring circuits Inductances Inductive potentiometers Infrared devices Initiators Injectors Inlets (piping components) Input devices for measured variables Input devices, analog Input devices, binary Inside shoe brakes Inside wall linings - see insulation Inspection glasses (flow, level) Instrument isolation valves Instrument lines Instrument racks Insulation Insulators (electrical) Integrator Interface layer control circuits Interface layer measuring circuits, direct Interface layer measuring circuits, indirect Interface modules Interference and spark suppression equipment (electrical) Interlocks, mechanical Inverse- time and definite- time overcurrent releases Inverters Inverters (electrical) Inverting amplifiers Ion exchangers Ionization chambers Isolation dampers Isolation gate valves Isolation globe valves Isolation valve assemblies Jack plugs Jet cleaning equipment Jet ejectors Jet pumps Jumper wires Junction boxes (electrical), GA- GG available Junction boxes (electrical), GA- GG available Junction boxes (electrical), GA- GG available Junction boxes (electrical), GA- GG available Junction boxes (electrical), GA- GG available Junction boxes (electrical), GA- GG available Junction boxes (electrical), GA- GG available Junction boxes for light- current- systems of national telecommunications Junction boxes for light- current systems, other than GM Page 14 of 29

Identification System for Power Stations List of Terms

st

1 Edition 1990

-K MG -P QP -D -D -Z CE -L -B -B -B BN MR -B -N -D MB QP KA QR BQ BU -F -N DL CL FL

AT AA AA AA AA AT BN AP GA GB GC GD GE GF GG GM GY

-D -Z MB -F -G -U -N KT -B KA KA KA -X KT KP -W

VGB Technical Commitee on Technical Classification Systems

KKS

Identification System for Power Stations List of Terms

Description

Equipment Component unit key key

Junction boxes for lighting Keyboards Keyless compression couplings Lamp poles Lasers Lathes Length control circuits Length measuring circuits, direct Length measuring circuits, indirect Length measuring instruments (non- electrical) Length sensors (electrical) Length transducers Level control circuits Level gauges (magnetic) Level indicators (non- electrical) Level measuring circuits, direct Level measuring circuits, direct Level measuring circuits, indirect Level monitors Level transducers Lift check valves Lift check valves, damped Lifting platforms Light fittings Light fittings complete with lamps Light switches Lighting equipment Lightning protection equipment Limit switches Limiters (electrical) Line monitors Liners Linings - see insulation Link conveyors Linkages Liquid crystal displays Liquid level control circuits Liquid level controllers (non- electrical) Liquid level measuring circuits, direct Liquid level measuring circuits, indirect Liquid level measuring instruments (non- electrical) Liquid ring compressors Liquid ring pumps Liquid starters (starting resistor electrical) Load cells (electrical) Load cells (non- electrical) Local control stations Lock out coils Logic elements (electrical) Logic testing equipment Loudspeakers Louver dampers Low voltage circuit- breakers Low voltage disconnectors Low voltage switch- disconnectors Low voltage switches

GP

st

1 Edition 1990

-S MK BQ AW DG CG FG

-A KW

QP -B -B DL QP QP CL CL FL

AA AA AE

-F -B KA KA -E -E -Q -E

GV -S -Z -F BS AF

KF MU -P

DL QN CL FL AN AP

AA

QP KN KP -R -B QB -A -Y -D -P -H KA -Q -Q -Q -Q

Page 15 of 29

VGB Technical Committee on Technical Classification Systems

KKS

Identification System for Power Stations List of Terms

Description

Equipment Component unit key key

Lubricating equipment Machine casing parts (for main and heavy machinery) Machine foundations Machine rotating parts (for main and heavy machinery) Machine tools Machine tools, stationary Machine tools, stationary for maintenance Magnetic drums Magnetic field transducers Magnetic filters - see electromagnetic filters Magnetic particle clutches Magnetic tape memories Magnetic tape units Magnetoresistive potentiometer Main grates Maintained- contact rotary control switches Manipulators Manual input measuring circuits, direct (manually- operated sensors) Marshaling racks Masers Mass control circuits Mass flow control circuits Mass flow density measuring circuits Mass flow limiters Mass flow limiters (as valves) Mass flow limiters (not valves) Mass flow measuring circuits Mass flow measuring circuits, direct Mass flow measuring circuits, indirect Mass flow sensors (non- electrical) Mass measuring circuits, direct Mass measuring circuits, indirect Mass measuring instruments Material property control circuits, other than DD, DM, DV Material property measuring circuits, direct, other than CD, CM, CV Material property measuring circuits, indirect, other than FD, FM, FV Measuring circuit isolation valves Measuring circuits for combined valves Measuring instruments (electrical) Measuring instruments (non- electrical) Mechanical power measuring circuits (electrical power = CE) Mechanical work measuring circuits (electrical work = CE) Melting furnaces Memories (electrical) Memory devices (electrical) Memory devices (mechanical) Mercury arc rectifiers Metal- to- metal clutches Metallic grid flexible couplings Metering equipment Metering orifices Metering pumps Meters Micro fuses Microphones Milling machines

AF HA

Page 16 of 29

st

1 Edition 1990

MF HB AW AW

KW KW KT -B

AV

MK -D -D -B KV -S

AE CH -X -A DW DF CF AA BP CF CF FF

KA KA

QB CW FW QP DQ CQ FQ KA CU -P QP CU CU AW

KW -D -D

BB -V MK MK AF AP

AW

QB KP -P -F -B KW

VGB Technical Commitee on Technical Classification Systems

KKS

Identification System for Power Stations List of Terms

Description

Equipment Component unit key key

Mills Miniature circuit breakers Miniaturized control equipment Mixers Mixing units Modems Moderator assemblies Modulating valves Modulators Momentary- contact limit switches Momentary- contact push buttons Momentary- contact relays Momentary- contact rocker switches Momentary- contact rotary control switches Momentary- contact switch assemblies Momentary- contact tumbler switches Monitoring devices (electrical) Monitoring equipment for plant maintenance Monitoring modules (electrical) Monitors Monitors Monostable elements Motor control centers Motor generators Motor protection switches Motor terminal boxes Motorized potentiometers Motors (electrical) Motors (non- electrical) Mounting racks Mufflers Multiblade dampers Multifuel engines Multiple- disc brakes Multiple plugs Multiplexers Multipoint selector switches Multiport ball valves Multiport check valves Multiport dampers Multiport gate valves Multiport globe valves Multipurpose valves Neutral balancing capacitors Neutral disconnectors Neutralizing equipment Neutron flux control circuits for reactor power Neutron flux measuring circuits for reactor power, direct Neutron flux measuring circuits for reactor power, indirect Neutron flux transducers Neutron sources Non- linear resistors Nozzles Nozzles - see flow restrictor nozzles or flow nozzles NTC and PTC thermistors (electrical) Oil burners

AJ

st

1 Edition 1990

KJ -F -S KM

AM -U JM AA

KA -U -S -S -K -S -S -S -S -D

AX -A -F -P -D GS -G -Q -X -R -M MM BQ BS AA

AA AA AA AA AA AA

AM DX CX FX

KA MM MB -X -U -S KA KA KA KA KA KA -C -Q KM

-B JN -R MR

AV

-R KV

Page 17 of 29

VGB Technical Committee on Technical Classification Systems

KKS

Description

Equipment Component unit key key

Oil- driven turbines Oil separators Oil sight glasses Oilers Once- through heaters Open vessels Operating counters Operating devices Operating mechanism (freewheeling clutch) Operational amplifiers Operator I/O typewriters Operator service equipment for process computers Operator service equipment for programmable controllers Optical character readers Optical transformers Optical waveguides Opto- isolators Orifice plates Orifices (not metering) Oscillators Oscillographs Oscilloscopes Outer sheating Outlet amplifiers Outlet valves Outlets (piping components) Output devices, analog Output devices, binary Outside shoe brakes Overcurrent protective devices Overcurrent releases, magnetic Overcurrent short- circuiting switches Overrunning clutches Overspeed trips Overvoltage protectors (electrical) Packaging equipment, only if part of process Packaging machines Packed clutches Pattern moulding machines Pawls Pegging steam safety valves Pelletizing equipment Pendulum mills Penetration assemblies Period (electrical) measuring circuits Peristaltic pumps Permanent magnets Personnel transport equipment Petrol engines Petrol traps (physical separation) pH converters pH measuring circuits pH transducers Photocells Photoelectric barriers Photoelectric cells Page 18 of 29

Identification System for Power Stations List of Terms

st

1 Edition 1990

AT

AH BB

MT KT QP KF KD -P -S MK -N -Y

GK GK

BP

-U -B -W -U QB KA -G -P -P

BU AA

-D KA MR -N -D MB -F -F -F MK -F -F

AK

AW AA AK AJ BQ CE AP AE AT

KK MK KW MB KA KJ MR KP -Y KE MM KT -B

CQ -B -B -B -B

VGB Technical Commitee on Technical Classification Systems

KKS

Description

Identification System for Power Stations List of Terms Equipment Component unit key key

Photoresistors Pick- ups Piezoelectric transducers Pilot oil burners (incl. Backup burners) Pilot pulverized fuel burners Pilot valves Pinch valves Pinned couplings Pipe bends Pipe connectors Pipe elbows Pipe unions Piping Piping penetrations Piping products Piston compressors Planing, slotting machines Plate- type heat exchangers Platforms Plenum assemblies Plotters Plug distributors Plug- in cards Plugs Pockets (only for sensors protection) Pole changing controls Polishing machines Polysius screws Position control circuits Position controllers (non- electrical) Position measuring circuits, direct Position measuring circuits, indirect Position measuring instruments (non- electrical) Position monitors Position sensors (electrical) Position sensors (non- electrical) Position transducers Positioner, electrical (not electric motor) Positioner, non- electrical Positioning drives, electrical (electric motor) Positioning gearboxes Positive- displacement fans Potential measuring instruments Potentiometers Power amplifiers Power contractors Power counters Power density measuring circuits (electromagn.) Power density measuring circuits (mechan.) Power outlets (electrical) Power supplies Power supply equipment Power supply modules Power supply units Power switchgear Powered manipulators

st

1 Edition 1990

AV AV AA

-B -B -B KV KV KA KA MK MR MR MR MR

BR BQ AN AW AC BQ JG

MR KN KW KC

-Y -X -A -X QT -Q AW KF DG QN CG FG

AN

QP -B -B QP -B -Y MS -M MG KN -B -R -N -K -P

CE CU GQ -G -G -G -G -Q AE

Page 19 of 29

VGB Technical Committee on Technical Classification Systems

KKS

Description

Equipment Component unit key key

Prandtl tubes Precipitation vessels Press tools Presses (packaging) Presses (tools) Pressure cells (electrical) Pressure control circuits Pressure controllers (electrical) Pressure controllers (non- electrical) Pressure gauges Pressure measuring circuits, direct Pressure measuring circuits, indirect Pressure measuring devices (non- electrical) Pressure reducing valves Pressure sensors Pressure sensors (electrical) Pressure switches Pressure switches Pressure test closures Pressure- to- pressure converters Pressure transducers (electrical) Pressure vessels Pressurizers Printed circuit boards (electrical) Printers Programmable controllers Programming plugs Proportioners Proportioning equipment Proportioning pumps Proportioning valves Protective equipment (electrical) Protective relays (electrical- magnetical) Proximity switches Pulse counters Pulse generators (electrical) Pulse measuring instruments (non- electrical) Pulse shapers Pulverized fuel burners Pump units Pumps Punches Push buttons Pylons Pyrometers Quality variable control circuits, direct, other than CD, CM, CV Quality variable control circuits, indirect, other than FD, FM, FV Quality variable control circuits, other than DD, DM, DV Quality variable sensors (electrical) Quartz oscillators Quick- closing check valves R/C Filters Rabbles Racks for electrical and I & C equipment Racks, other than GZ Radar detectors (level) Page 20 of 29

Identification System for Power Stations List of Terms

st

1 Edition 1990

QB KT AW KK KW -B DP -N QN QP CP FP AA

BB BB

AF AP AA

AV AP AW

QP KA -P -B -F -S KA QB -B KD KD -A -Y -D -X KF KP KA -F -F -B -D -B QP -D KV KP KW -S

BQ -B CQ FQ DQ

AA AM GZ BQ

-B -G KA -Z KM

-B

VGB Technical Commitee on Technical Classification Systems

KKS

Identification System for Power Stations List of Terms

Description

Equipment Component unit key key

Radial- flow blowers Radial- flow compressors Radial- flow fans Radiation control circuits Radiation detectors Radiation measuring circuits, direct Radiation measuring circuits, indirect Radiation measuring instruments Radiation monitors Radiation sensors (electrical) Radiation transducers Radiators Radiators as equipment units Radio relay systems, PLS and UHF Radio sets Radio transmitters Railings Rails Rapping gear (for separation) Reaction vessels Receivers (electrical) Reciprocating compressors Reciprocating pumps Recombiners Recorders Rectifier components Rectifiers Reducers Reduction gearings Reed relays Reflector assemblies Refrigerating heat exchangers Refrigerators Refuse shredders Registers Regulating ball valves Regulating dampers Regulating gate valves Regulating resistors Regulating valve assemblies Reheaters Relay modules Relays Releasing controllers Relief valves Remote control devices Remote- indicating circuit- breakers Remote manipulators Remote position sensors Resistance devices Resistance heating devices Resistance measuring circuits (apparent, active, reactive) Resistance thermometers Resistance trace heaters (electrical) Resistors (electrical) Retarded combustion grates

AN AN AN DR

st

1 Edition 1990

KN KN KN -B

CR FR -B -E -B -B KC AH -W -B -E BQ BQ AT BB AN AP AT

JF AC AH AJ AA AA AA AA AC

AS AA

KD -E KN KP KT -P -G -V MR MG -K KC KJ -D KA KA KA -R KA KC -D -K KA -U -F KE -B -R

AH CE

AV

-B -E -R KV

Page 21 of 29

VGB Technical Committee on Technical Classification Systems

KKS

Description

Equipment Component unit key key

RF transmission paths Rheostatic starters (electrical) Rheostats Rinsing basins Rinsing equipment Rocker switches Roller conveyors Roller crushers Roller grates Roller mills Rolling equipment (machine tools) Rolling gates Roots blower Rope drives Rope winches Rotary air heaters Rotary blowers Rotary brushes Rotary compressors Rotary displacement pumps Rotary filters Rotary mixers Rotary piston blowers Rotary piston compressors Rotary piston pumps Rotary resolvers Rotary thickeners Rotary transformers Rotary valve compressors Rotary valve pumps Rotary vane compressors Rotary vane feeders Rotating drums RT- type pipe unions Rubber flexible couplings Rupture discs Rupture- type safety equipment Safety check valves Safety clutches Safety dampers Safety valves Sand classifiers Sawing machines (machine tools) Scale- link travelling grates Scraper chain conveyors Scraper conveyors Scrapers Screening machines Screens Screens (for cleaning) Screw compressors Screw conveyors Screw- in fuses Screw pumps Scrubber towers Scrubbers Page 22 of 29

Identification System for Power Stations List of Terms

AT AF AJ AV AJ AW AB AN AE AH AN AN AP AT AM AN AN AP AM AN AP AN AF

AA AA AA AA AW AV AF AF

-W -R -R KD KT -S KF KJ KV KJ KW KB KN MU KE KN KT KN KP KT KM KN KN KP -H KM -T KN KP KN KF -S MR MK KA KA MK KA KA KT KW KV KF KT

AT

AN AF AP AT AT st

1 Edition 1990

KT KT KN KF -F KP KT KT

VGB Technical Commitee on Technical Classification Systems

KKS

Description

Identification System for Power Stations List of Terms Equipment Component unit key key

Selector switches Selectors (electrical) Semiconductors Sensors (electrical) Sensors (non- electrical) Sensors (only if not structurally integral with QP) Separating equipment Separating machines Separator valves Separators Sequence annunciators Sequencers Servo- mechanism (non- electrical), other than MG and MK Servo- mechanism equipment Setpoint adjusters Settering orifices Settling ponds Settling tanks Shafts (for erection and maintenance only) Shakers Shaking equipment Shaping machines (machine tools) Shear blades (machine tools) Shear bolt couplings Sheating Shielding - see insulation Shielding equipment, nuclear Shift registers (eletrot.) Shock absorbers Shoe brakes Short- circuiting equipment (electrical) Showers Shunt resistors Shunts Sight glasses Signal blockers Signal conditioning for computers (EM- EQ available) Signal conditioning for computers (EM- EQ available) Signal conditioning for computers (EM- EQ available) Signal conditioning for computers (EM- EQ available) Signal conditioning for controls (EA- EE available) Signal conditioning for controls (EA- EE available) Signal conditioning for controls (EA- EE available) Signal conditioning for controls (EA- EE available) Signal conditioning for controls (EA- EE available) Signal conditioning for protection (EW- EZ available) Signal conditioning for protection (EW- EZ available) Signal conditioning for protection (EW- EZ available) Signal conditioning for protection (EW- EZ available) Signal conditioning for reactor protection Signal conditioning for signaling (EG- EK available) Signal conditioning for signaling (EG- EK available) Signal conditioning for signaling (EG- EK available) Signal conditioning for signaling (EG- EK available) Signal conditioning, combined Signal converters

st

1 Edition 1990

AT AT AA AT

-S -S -V -B QB QB KT KT KA KT -H -D MU

AU

BB AT BE

-N QB KD KD KT

AT AW AW

KW KW MK

BU JS -D BQ MB -F AT -R -R QP -D EM EN EP EQ EA EB EC ED EE EW EX EY EZ ER EG EH EJ EK EU -N

Page 23 of 29

VGB Technical Committee on Technical Classification Systems

KKS

Description

Equipment Component unit key key

Signal converters Signal devices (electrical) Signal fuses Signal isolators Signaling equipment (electrical) Signaling equipment (non- electrical) Signaling lamps Signaling modules Silencers Simulators Siphon loops Sira valves Sirens Slat conveyors Sleeve couplings Slewing crushers Slewing gates Slewing mechanisms Sliding gates Smoke detectors Smoothing chokes Snubbers Socket outlets Sockets (power outlets, electrical) Solder tag blocks Solenoid actuators Solenoid locking actuators Solenoid valves Solenoids Solid waste balers Soot- blowers Sound pressure measuring circuits Special assemblies (nuclear) Special components (electrical) Specific gravity measuring circuits Specific volume measuring circuits Spectrometers Speed control circuits Speed governors (non- electrical) Speed measuring circuits, direct Speed measuring circuits, indirect Speed measuring devices (non- electrical) Speed measuring instruments (non- electrical) Speed sensors (electrical) Speed transducers (electrical) Spherical cap luminous annunciators Spray attemporators Spray- coating equipment Spray equipment Spring clutches Sprinkling equipment (for aerating/deaerating) Sprinkling equipment (for cooling) Sprinkling equipment (for separation) Stairways Standard volume measuring circuits Star- delta starters Page 24 of 29

Identification System for Power Stations List of Terms

st

1 Edition 1990

-U -H -F -U -H QH -H -H BS

AA

AJ AB AE AB

-P MR KA -H KF MK KJ KB KE KB QH -L

BQ -X -X -X -Y -Y AA AK AT CP JZ

-Y KK KT

-E CD CD -B DS QN CS FS

AC AW AT

QP QP -B -B -H KC KW MK

AT AC AT BQ CD -Q

VGB Technical Commitee on Technical Classification Systems

KKS

Description

Identification System for Power Stations List of Terms Equipment Component unit key key

Starter motors (electrical) Starters Starters (electrical) Starting engines (non- electrical) Static converters Static inverters Stationary grates Steam conditioning valves Steam drums Steam engines Steam generators Steam jet refrigerators Steam- operated air ejectors Steam- operated jet pumps Steam rate, special measuring circuits Steam soot- blowers Steam turbines Steam valves Steel pylons Steel spring clutches Stirring equipment Stirring units Stopcocks Storage and memory functions Storage tanks Stork spargers Strain gauge cells Strain gauges Strain transducers Strength measuring circuits Strippers Structural supports for electrical and I & C equipment Structural supports, other than GZ Subassemblies Subassemblies (not assignable to another letter) Subassemblies for high- voltage switchgear Subassemblies for instrumentation and control Subassemblies for low- voltage switchgear Submersible pumps Sunken gates Superheaters Support frames Supports for electrical and I & C equipment Supports, other than GZ Surface heat exchangers Surge arrester systems Surge arresters Surge conductors Surge diverters Surge protective devices Surge short- circuiters Surge tanks (in measuring circuits) Surge tanks (system engineering) Swing check valves Swing check valves, damped Switches in main power circuits

st

1 Edition 1990

AA AT AC AH BN

-M -D -R MM -G -G KV KA KD MM KC

KP CU AT AA BQ

MT KA MK

AM AM AA BB

CU AT GZ BQ

KA -D KD KT -B -B -B KT

-A -A -A -A -A AP AB AC BQ GZ BQ AC GV

AA AA

KB KC

KC -F -F -F -F -F QS KD KA KA -Q

Page 25 of 29

VGB Technical Committee on Technical Classification Systems

KKS

Description

Equipment Component unit key key

Switches in protective circuitry Switches, electrical Switchgear equipment (if not identified under procedure equipment) Switchgear trucks Switchgear, automatic Synchro- generators (electrical) Synchronization monitoring devices Synchronous motors Tachometer generators Tachometers (electrical) Tanks Tap changers for transformers Tape punches Telecommunication cables Telegraphic translators Telemeters Telephone sets Telephones Temperature control circuits Temperature controllers (non- electrical) Temperature measuring circuits, direct Temperature measuring circuits, indirect Temperature measuring instruments (non- electrical) Temperature monitors Temperature sensors (electrical) Temperature sensors (non- electrical) Temperature transducers (electrical) Tensioning equipment, not for electrical control variables Terminal blocks Terminals Terminations (electrical) Test adapters Test equipment (electrical) Test equipment (non- electrical) Test equipment for plant maintenance Test fittings Test jacks Test plugs Testing fixtures Testing machines Thermal insulation Thermal power measuring circuits Thermal quantity measuring circuits Thermal/cutting machine tools Thermocouples Thermoelectric cells Thermoelectric sensors Thermometers (non- electrical) Thermostats Thermowells (only for sensor protection) Thickeners Thickening evaporators Thin- film evaporators for separating media Throttling valves Through conveyors Thyratrons Page 26 of 29

Identification System for Power Stations List of Terms

st

1 Edition 1990

-Q -S GS GS GS

-A -B -F -M -B -B KD -Q

AW -W -U -P -B -B DT QN CT FT QP -F -B QP -B AS -X -X -Z -P -P QP AX

AX AX BU CU CU AW

-P -X -X QP

-B -B -B QP -B QT AT AT AT AA AF

KA KF -V

VGB Technical Commitee on Technical Classification Systems

KKS

Description

Identification System for Power Stations List of Terms Equipment Component unit key key

Thyristor controllers Thyristors Time control circuits Time- delay relays Time measuring circuits, direct Time measuring circuits, indirect Time measuring instruments (non- electrical) Time monitors Time transducers Timers Timing accessories Timing relays Tipping equipment Tooling, stationary Toothed couplings Torque measuring circuits Trace heating equipment Transducers Transductors Transformer circulation pumps Transformer equipment Transformer load devices Transformers Transistors Transmission gear (non- electrical), other than MG, MK Transmission paths (electrical) Transmission shafts (non- electrical) Transport gear Travelling grates Triacs Trigger equipment Trips, magnetic Trolleys (associated with process) Tube mills Tubes (electrical) Tubs Tumbler switches Tun dishes Tunnel diodes Turbines (not main and heavy machinery) Turbocompressors Turbofans Turning gear Turntables (for railway vehicles) TV cameras Ultrasonic cleaning equipment Ultrasonic instruments Underfeed stokers Uniselectors Universal- fuel engines (non- electrical) Universal motors (electrical) Vacuum breakers Valve assemblies (valve blank) Valve boxes Valve chests Valves (electrical)

st

1 Edition 1990

-G -V DK -K CK FK QP -D -B -D -D -K AE AW

KW MK

CW AH

AP GT

AE AV

AE AJ BB

AN AN AE AE

-B -N KP -Q -T -V MU -W MU KE KV -V -N -F KJ -V KD -S MR -V MT KN KN KE KE -E

AT AV

AA AA

-B KV -S MM -M KA KA KA -V

Page 27 of 29

VGB Technical Committee on Technical Classification Systems

KKS

Identification System for Power Stations List of Terms

Description

Equipment Component unit key key

Valves, dampers, etc., incl. Actuators, also manual Valves, excl. Actuators Vane pumps Vapor compression refrigerators Vapor extractors Vaposcopes Variable capacitance diodes Vent valves Ventilation ducts Venturis Vessel level measuring circuits Vibrating control circuits Vibrating conveyors Vibrating screens Vibration detectors (electrical) Vibration measuring circuits, direct Vibration measuring circuits, indirect Vibration measuring instruments (non- electrical) Vibration sensors Vibration transducers Vibrators (for separating) Video display units Video screens Viscosity control circuits Viscosity measuring circuits, direct Viscosity measuring circuits, indirect Viscosity measuring instruments (non- electrical) Viscosity sensors (electrical) Voltage measuring circuits (electrical) Voltage monitors Voltage operated earth- leakage circuit- breakers Voltage transformers Volume measuring circuits (for vessels) Volume measuring circuits (not for vessels) Volumetric flow measuring circuits Volumetric flow rate measuring circuits Volumetric flow sensors (electrical) Volumetric flow sensors (non- electrical) Waldron couplings Washing machines Water meters Water- operated air ejectors Water- operated jet pumps Water soot- blowers Waterhammer suppressors Wave traps (electrical) Weighing machines Weighing machines as measuring circuits Weight control circuits Weight measuring circuits Weight measuring circuits, direct Weight measuring circuits, indirect Weight measuring instruments (non- electrical) Weight transducers (electrical) Weirs Welded joints

AA

Page 28 of 29

st

1 Edition 1990

AP AH AN AA AA BR CL DY AF AT

KA KP KN KA -V KA MR QB

KF KT -B

CY FY

AT

QV -B -B KT -P -E

DV CV FV QP -B CE -F -F -T CL CU CF CF -B QB MK AT QP BN BN AT AA

KT KA -L QB

CW DW CW CW FW QP -B AB MR

VGB Technical Commitee on Technical Classification Systems

KKS

Identification System for Power Stations List of Terms

Description

Equipment Component unit key key

Welding machines Winches Windows Work meters Zener diodes

AW AE AB

st

1 Edition 1990

KE KB -P -V

Page 29 of 29