Powerguard Heavy Duty

I

W e i n al c o so rro of si fer ve S a t DFs m os for p h us er e e

Switch disconnector fuse unit, Type 3KL and Switch disconnector unit, Type 3KA Range 3KL : Switch Disconnector Fuse Unit Open

In SS Enclosure

32A, 50A, 63A, 100A, 125A, 200A, 250A, 315A, 400A, 630A, 800A 32A, 63A, 125A, 250A, 400A, 630A

3KA : Switch Disconnector Unit Open

63A, 125A, 250A, 400A, 630A, 1000A, 1600A

Application

Standards

Siemens pioneered the AC23A concept, now widely demanded by customers/consultants alike. 3KL/ 3KA unit are suitable for diverse applications of switching ranging from no-load conditions to stringent conditions e.g. switching highly inductive loads. They can be used for mixed resistive, inductive loads, capacitor banks and both in AC & DC circuits. Special execution for corrosive atmosphere are also available.

The Switch disconnector fuse and Switch disconnector conform to IEC 947-3 and IS 13947-3.

India's most trusted and popular SDF / SD units.

Note: Switch disconnector fuse units (SDF) were earlier called fuse switch units.

Benefits

electrical life eliminates any need for contact replacement.

a) Wide range Single source for, SDFs, open upto 800 A SDFs, in SS enclosure upto 630 A SDs, open upto 1600 A

g) Positive isolation All 3KL/3KA satisfy the isolation requirements of IEC 947 / IS 13947 standards. This provides greater safety to operating personnel.

b) No movement of fuses Prevents loosening of fuses; hence reliable short circuit protection. c) Suitable for knife blade fuses Reduced down time for fuse inspection/replacement. d) Double break feature* Isolates the fuses at both the ends. Thus total protection to operating personnel. e) Wide service temperature range -20°C to 55°C Siemens SDFs require no derating even upto service temp of +55°C. e.g. in a distribution feeder with a load current of 375A, you may use 3KL unit rated 400A. If one uses an unit of other make (which needs to be derated at 55°C, say by 15%), it can be used only upto 340A. Thus a 630A unit of that make may be necessary for same application. This means approx. 40% increase in cost for this particular example. f) Maintenance free Very high mechanical life coupled with an equally high

h) Positive indication of contact separation Siemens SDFs come with built in POSITIVE OFF indicator. For the purpose of identifying the ON/OFF state of the unit reliably, for obvious reasons, the handle on the door is normally not preferred by maintenance personnel / consultants. In makes without a POSITIVE OFF indicator, an auxiliary switch plus lamp would be required, amounting to approx. Rs. 300 for 125A SDF. Thus in a typical 125A unit of non-Siemens make one has to reckon with an extra cost of approx. 10%. Of course, the combination of auxiliary switch plus pilot lamp is still not as positive as an unit with built in POSITIVE OFF indicator. i) Adjustable drive shaft, to suit panel depth Siemens SDFs come with a telescopic shaft which allows the panel builder to readily use it for varying panel depth. In the case of other makes, the non-availability of a telescopic shaft makes the

unit inflexible. Hence the panel builder has to fabricate an additional bracket to adapt unit to his panel depth. Thereby increasing labour time & cost e.g. approx. Rs. 50 for 125A unit. j) Front Drive Front drive incorporates door interlock with defeat facility, and padlocking as a standard. k) Neutral Link Every SDF/SD is provided with a neutral link. Its terminals are suitable for accommodating neutral conductors of half the cross-section as those of the maximum permissible main cables. l) Phase barriers as standard Provides greater safety. m) Fuse monitoring provision All 3KL units have tapped holes on lyra contacts to allow monitoring of fuse state using Siemens fuse-monitor type 3VU1300-MS00. n) Suitable for AC loads, DC loads, capacitor application. o) Mounting at 90o in the vertical plane possible. p) Completely type tested at CPRI/ERDA.

* Single Break for 3KA 16, 1600A Switch disconnector

Positive OFF Indicator

3KL47 30

2

1. Switch disconnector fuse unit. 2. Fuse-monitor

Switch disconnector fuse unit type 3KL

3KL25 30

Contact System The heart of Siemens SDF unit type 3KL is the unique moving contact system (see illustration) comprising multiple silver plated copper rollers which are spring loaded, free to rotate around their axis and firmly anchored. The spring loading is so designed that the contact friction is minimised and rollers rotate to avoid any tendency of locking or welding. Fixed contacts are knife blade type. Hence self cleaning feature is assured.

Advantages of the Contact System • High short circuit making and withstand capacity. Due to the multiple roller design, each roller carries only a fraction of the total current. This leads to reduction of electrodynamic repelling forces when the switch is in ‘ON’ position. e.g., in 3KL61, there are eight rollers at each break and each roller carries 1/8th of the total current. When the switch is ‘ON’, the forces in each phase are reduced to 1/64 of original. The above feature along with the high closing speed of the unit results in high making capacity. At the same time, when the contacts are closed, based on the principle of increase in attraction due to electrodynamic

force between parallel current paths, the opening of contacts under high short circuits [80kA (rms)] is prevented, thus leading to high short circuit withstand capacity. • High breaking capacity The high breaking capacity corresponding to AC23A utilization category at 550V, is mainly achieved by current sharing in multiple rollers per phase. • Long electrical life Division of current loading explained earlier leads to reduction in arcing time and hence lesser erosion of contacts thus giving long electrical life. • Long mechanical life Lower operating torque, hence longer mechanical life.

3KL Contact System

Switch disconnector unit type 3KA Heavy duty TPN, double break switch disconnectors, type 3KA are also available. The principle of construction is similar to 3KL and, therefore, they have the same high performance.

3

Selection Table for SDF unit and SD unit Rated Suitable for HRC fuse type Order No. for SDF Operational unit in open Current execution without at 550V, 50Hz, 3ph Fuses

Order No. for SDF unit in sheet-steel housing without Fuses

Order no. for SD unit in open execution

Order no. for TIN plated SDF unit for corrosive atmosphere*

32A

3NA 38

DIN

3KL47 30-1YA00

3KL47 37-1YA00

–

–

50A

3NA 38

DIN

3KL49 30-1YA00

–

–

–

63A

3NA 38

DIN

3KL50 30-1YA00

3KL50 37-1YA00

32A

3NWTIA

BS

3KL47 30-1YJ00

–

–

–

50A

3NWTIA

BS

3KL49 30-1YJ00

–

–

–

63A

3NWTIA/3NWTIS

BS

3KL50 30-1YJ00

–

–

–

100A

3NA 38

DIN

3KL51 30-1YA00

–

–

–

125A

3NA 38

DIN

3KL52 30-1YA00

3KL52 37-1YA00

200A

3NA 31

DIN

3KL54 30-1YA00

–

250A

3NA 31

DIN

3KL25 30-1YA00

3LK25 37-1YA00

315A

3NA 32

DIN

3KL31 30-1YA00

–

400A

3NA 32

DIN

3KL41 30-1YA00

3KL41 37-1YA00

3KA41 30-1YA00

3KL41 30-3YA00

630A

3NA 33

DIN

3KL61 30-1YA00

3KL61 37-1YA00

3KA61 30-1YA00

3KL61 30-3YA00

800A

3NWTSLS

BS

3KL81 30-1YJ00

–

1000A

–

–

–

–

3KA10 30-1YA00

–

1600A

–

–

–

–

3KA16 30-1YA00

–

3KA50 30-1YA00

3KA52 30-1YA00

3KL50 30-3YA00

3KL52 30-3YA00

– 3KA25 30-1YA00

– 3KL25 30-3YA00

–

–

–

–

Note : SDF/SD units supplied in Siemens drawout MCC’s and PCC’s are slightly different from the ones described herein. We request you to get in touch with our nearest sales office for replacement requirements. * In case of tin plated SDFs, please contact Siemens for derating factor.

Selection Table for 3KL/3KA Accessories Description

3KL47/49/50 3KA50 Order No.

3KL51/52 3KA52 Order No.

3KL54/25/31/41 3KA25/41/61 Order No.

3KL61/3KL81 3KA10/3KA16 Order No.

Phase Barriers

3KX34 87-1YA

3KX34 87-1YA

3KX35 57-1YA

3KX35 87-1YA

Protection Guard Kit

3KX34 87-1YB

3KX35 27-1YB

3KX35 57-1YB

3KX35 87-1YB

Aux. Switch Kit (1NO + 1NC)

3SB14 00-0A

3KX35 22-1YC

3KX35 52-1YC

3KX35 82-1YC

3KX35 22-1YD

3KX35 52-1YD

3KX35 82-1YD

8UC62

8UC63

8UC64

Aux. Switch Kit (2NO + 2NC) Front Drive with door interlock, defeat and padlocking facility

–

3KX35 28-1YN

3KX35 58-1YN

3KX35 88-1YN+

Castell interlock (2 locks & 2 keys)

–

–

3KX35 88-1YPF

3KX35 88-1YPF

–

–

8UC92 55

8UC92 55

Depth Setting Template (for quick and correct mounting of 8UC drive) F

4

8UC61

Add-on switched neutral

Switch coupler to replace old 3KX drive by new 8UC drive

+

–

8UC60 46

For 3KL61 and 3KL81 only. The 11th place of the order number indicates the alphabet type of the lock & key; combinations available are A,B,C,D,E & F.

Technical data Data 3KL47 3KL49

3KL50

Switch disconnector fuse unit 3KL51 3KL52 3KL54 3KL25 3KL31 3KL41 3KL61 3KL81 -20oC to +55oC

Service temperature w/o derating Rated continuous current

Switch disconnector unit 3KA50 3KA52 3KA25 3KA41 3KA61 3KA10 3KA16

32A

50A

63A

100A

-20°C to +55°C

125A 200A 250A 315A 400A 630A 800A

Rated insulation voltage

660V

Rated voltage at 50Hz*

550V

63A

125A 250A 400A 630A 1000A 1600A 660V 550V

le/AC22 at 550V, 50Hz, 3ph

32A

50A

63A

100A

125A 200A 250A 315A 400A 630A 800A

63A

125A 250A 400A 630A 1000A 1600+A

le/AC23A at 550V, 50 Hz, 3ph

20A

32A

63A

100A

125A 200A 250A 315A 400A 630A 800A

63A

125A 250A 400A 630A 1000A 1600+A

Maximum permissible fuse rating (backup HRC fuse in case of 3KA)

32A

50A

63A

100A

125A 200A 250A 315A 400A 630A 800A

63A

125A 250A 400A 630A 1000A 1600+A

Siemens HRC fuses - DIN

3NA38 3NA38

3NA38

3NA38 3NA38 3NA31 3NA31 3NA32 3NA32 3NA33

Siemens HRC fuses - Bolted

3NWTIA 3NWTIA 3NWTIA/ – 3NWTIS

–

–

–

–

–

–

3NWTSLS

80kA

80kA

80kA

–

–

80kA –

–

–

–

–

80kA

–

–

–

–

80kA

80kA

80kA

–

–

–

–

–

–

80kA

–

–

–

2kA

8kA 58

–

Type 3NA3

@

@ (See note)

@

@ (See note)

Rated short circuit making capacity (rms) with maximum permissible Siemens HRC fuses - DIN Siemens HRC fuses - Bolted

80kA –

–

–

–

–

–

–

14kA

20kA

25kA

50kA

50kA

116

186

186

467

Upon enquiry

Fused short circuit withstand current (rms) with maximum permissible 80kA

Siemens HRC fuses - DIN Siemens HRC fuses - Bolted Rated short time withstand current (1 sec rating - rms)

–

80kA

not applicable

Suitable for max. capacitor bank (KVAR)

12

14

29

46

58

95

116

145

186

294

374

29

Mechanical life in switching cycles

15000

15000

15000

15000

15000 10000 10000 10000 10000 5000

3000

15000 15000 10000 10000 10000 5000

– Main Terminals mm2

1x35

1x35

1x35

1x70

1x70

1x300 1x300 1x300 2x300 2x400 2x630

1x35

1x70

1x300 2x300 2x400 2x630 4x60x10++

– Neutral Terminal mm2

1x16

1x16

1x16

1x35

1x35

1x50

1x150 1x150 2x150 2x185 2x300

1x16

1x35

1x150 2x150 2x185 2x300 2x40x10++

Approx. weight of unit in open execution without drive and fuses

0.65 Kgs

0.65 Kgs

0.7 Kgs

2.7 Kgs

2.7 Kgs

7 Kgs

7 Kgs

7.5 Kgs

8 Kgs

14 Kgs

15 Kgs

0.65 Kgs

2.7 Kgs

7 Kgs

8 Kgs

8 Kgs

11.7 Kgs

16 Kgs

Continuous current

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

Rated voltage, AC, 50Hz

500V

500V

500V

500V

500V 500V 500V 500V 500V 500V 500V

3000

Terminal size suitable for AI cables with lugs

Ratings of Aux. Switches

DC

500V 500V 500V 500V 500V 500V 500V

600V

600V

600V

600V

600V 600V 600V 600V 600V 600V 600V

600V 600V 600V 600V 600V 600V 600V

le/AC12 at 415V

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

le/DC12 at 110V

4A

4A

4A

4A

4A

4A

4A

4A

4A

4A

4A

4A

4A

4A

4A

4A

4A

4A

Maximum fuse rating for short circuit protection : delayed action cartridge type

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

10A

@ Use fuses of reputed make only * Higher rated voltages - on enquiry

+AC 21 at 500V, 50Hz

++ Flats

DC Ratings of Switch disconnector fuse unit and Switch disconnector unit Type

Type of connection

3KL 47 Two poles in series 3KL 49 +ve

-ve

3KL50/3KA50 3KL51 3KL52/3KA52 Three poles in series 3KL54 3KL25/3KA25/3KL31 3KL41/3KA41 3KA61 3KL61 3KA10 3KA16

DC rating

Two poles in series Three poles in series Two poles in series Three poles in series Two poles in series Three poles in series Two poles in series Three poles in series Two poles in series Three poles in series Two poles in series

le/DC23 at 220V = 20A le/DC23 at 440V = 20A le/DC23 at 220V = 32A le/DC23 at 440V = 32A le/DC23 at 220V = 63A le/DC23 at 440V = 63A le/DC23 at 220V = 100A le/DC23 at 440V = 100A le/DC23 at 220V = 125A le/DC23 at 440V = 125A le/DC22 at 440V = 200A

Two poles in series

le/DC22 at 440V = 250A

Two poles in series

le/DC22 at 440V = 630A

+ve

To Load L = Load

Upon Enquiry

5

Switch disconnector fuse units in open execution Type: 3KL47 3/3KL49 3/3KL50 3 (Suitable for bolted fuses)

Type: 3KL47 3/3KL49 3/3KL50 3 (Suitable for DIN fuses)

Type: 3KL51 3 / 52 3 (Suitable for DIN fuses)

All dimensions are in mm. 6

Switch disconnector fuse units in open execution Type: 3KL54 3/3KL25 3/3KL31 3/3KL41 3 (Suitable for DIN fuses)

Switch disconnector fuse type

A

B

C

D

E

F

3KL54 / 3KL25 / 3KL31

234

12.5

66.5

80

4

203/217

3KL41

245

12.5

70

75

6

217

Type: 3KL61 3 (Suitable for DIN fuses)

Type: 3KL81 3 (Suitable for bolted fuses)

All dimensions are in mm. 7

Switch disconnector fuse units in sheet steel enclosure Type: 3KL47 37 / 3KL50 37 / 3KL52 37

Type: 3KL25 37 / 3KL41 37 / 3KL61 37

Type of Switch disconnector fuse

A

B

C

D

E

F

G

H

I

J

3KL25 37

80

4

400

300

60

215

26.5

180

176

6.5

3KL41 37

75

6

400

300

60

215

26.5

180

176

6.5

3KL61 37

95

6

400

395

96

262

25

208

223.5

2.5

Mounting Dimensions of sheet steel housing

All dimensions are in mm. 8

Type of Switch disconnector fuse

A

B

C

D

3KL47 37 / 3KL50 37 / 3KL52 37

220

180

30

30

3KL25 37 / 3KL41 37

370

180

15

60

3KL61 37

320

208

40

96

Switch disconnector units in open execution Type: 3KA50 3

Type: 3KA52 3

Type: 3KA25 3 / 3KA41 3 / 3KA61 3

Dimensions in mm Switch type

A

B

C

D

E

F

3KA 253

234

12.5

66.5

80

4

147

3KA 413

254

12.5

66.5

80

4

147

3KA 613

270

15

70

75

6

156

All dimensions are in mm. 9

Switch disconnector units in open execution Type: 3KA10 3

Type: 3KA16

All dimensions are in mm. 10

8UC6 Front Drive – Some Features

À

Drive coupler Operating or extension shaft

 Ã

Installation

À

Mounting position for switches and rotary mechanisms with “0” position.

Á

Door hinge spacing.

Ä

a

Handle with masking frame

d

Fixing screws

b

Gasket

e

Drive coupler

c

Door

f

Operating shaft

Required position of drive coupler with respect to handle.

Pull-out strength : The pull-out strength (=being pulled of the shaft or destruction of the mechanism) of locked mechanisms is ³ 800N with pulling force exerted directly on the mechanism in the direction of the shaft.

Å

Basic design

Tolerances of drive coupler and operating or extension shaft.

Æ

Door interlock defeat facility Push through knockout (a) and actuate with any pin to defeat door interlock. Locking facility in “OFF” position.

È Ç

Ç

Removing the door interlock The hooks (b) serve only to secure during transport.

È

Mounting position of Switch Coupler for 3KL 54/25/31/ 41/61/81 for coupling with 8UC63 and 8UC64 drives.

11

Sequence for mounting the 8UC drive. 1. Mount the product inside the panel. 2. Make the cut-outs on the panel door. (Ref. Door drilling dimensions below) 3. Mount drive coupler on the shaft of the unit. 4. Close the panel door fully, as is the case during operation. 5. Adjust the drive coupler with the help of Depth Setting Template as shown. 6. Mount the handle of the 8UC on the panel door.

* 3KL47/48/49/50/51/52, 3KA50/52, RHOEBO, 3VU9133/63, 3RV19.26/36/46 ** 3KL54/25/31/41/61/81, 3KA25/41/61/10/16, RHOFBO/JBO/MBO

Door drilling dimensions (8UC61 / 8UC62)

Door drilling dimensions (8UC63 / 8UC64)

(Not to scale)

(Not to scale)

8UC6 Front Drive – Installation and adjustment dimensions

Check for easy movement of door interlock. 1) Dimension to be adjusted

SDF/SD Unit

Front Drive

L

D

H 66

K (Min) 180

K (Max) 260

3KL47/49/50 3KA50 3KL51/52 3KA52 3KL54/25/31/41 3KA25/41/61 3KL61/81 3KA10/16

8UC61

36

28

8UC62

62

28

66

180

240

8UC63

140

40

88

231

256

8UC64

200

40

88

285

310

All dimensions are in mm. Siemens Ltd. Standard Products Division Control and Distribution Products Fax : (022) 760 0076

Siemens Ltd. SGR-01-109-035 This replaces SGR-01-109-034

‘Product development is a continuous process. Consequently, the data indicated in this leaflet is subject to change without prior notice. For latest issue contact our Sales Offices.’

069910 UNIFORM