Specification for Motors

SPECIFICATION FOR MOTORS

SPECIFICATION FOR MOTORS

Page 1 of 10

SPECIFICATION FOR MOTORS

INDEX

1.0

INTRODUCTION .................................................................................................................... 3

2.0

CODES & STANDARDS .......................................................................................................... 3

3.0

SERVICE CONDITIONS .......................................................................................................... 4

4.0

DESIGN AND CONSTRUCTION .............................................................................................. 4

5.0

ACCESSORIES ........................................................................................................................ 8

6.0

TEST AND INSPECTION ......................................................................................................... 9

7.0

GUARANTEE & DELIVERY REQUIREMENTS ........................................................................ 10

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SPECIFICATION FOR MOTORS

1.0

INTRODUCTION This Specification covers requirements for the design, supply, manufacture, testing & inspection of the LV Motors.

2.0

CODES & STANDARDS Unless otherwise specified in this specification, all components and equipment shall be based on the following standard: IEC

International Electro technical Commission Standards

IEC-60034

Rotating Electrical Machines

IEC-60079

Electrical apparatus for explosive gas atmospheres

IEC-60085

Classification of Materials for the Insulation.

BS 2757

Method for determining the thermal classification of electric Insulation

BS 4278

Specification for eye bolts for lifting purpose

BS 4683

Part 2: The construction & testing of Flame poof enclosures of electrical apparatus

BS-4999

General requirements for rotating electrical machines Part 0, Part 101, Part 105, Part 108, Part 111, Part 112, Part 141, Part142, Part 143, Part 145

BS-5501

Electrical apparatus for potentially explosive atmospheres

BS-5354

Selection, Installation and maintenance of Electrical apparatus for use in potentially Explosive atmospheres.

2. It shall be manufacturer’s responsibility to be, or to become, knowledgeable of the requirements of these standards and codes. Any changes or alternations to the equipment to make it meet standards and codes requirements shall be at the expense of the manufacturer.

3. Order of Preference for Documents

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SPECIFICATION FOR MOTORS

3.0

•

Country laws and regulation

•

Project specifications and drawings

•

IEC & Internationally recognized Standards

SERVICE CONDITIONS The electric motors and accessories shall be designed and constructed for use under the following site conditions. Site Location

: Pengerang Independent Deepwater petroleum Terminal, Pengerang

4.0

Design temperature

: 60 ºC

Minimum ambient temperature

: 20ºC

Relative humidity

: 100%

Altitude above MSL

: 40m

Seismic Condit

: Plant Site is located in ZONE-II/Zone-I/Safe

Design Rainfall Density

: 150mm/hr

Environment

: tropical, exposure to extreme moisture

DESIGN AND CONSTRUCTION 1. Motors shall be of three-phase squirrel cage induction motors and shall comply with the requirements of above standards unless otherwise specified. Motors shall be designed for duty type S1 and be suitable for direct online starting, unless otherwise specified. 2. Motors shall have IEC frame size in accordance with IEC-60072-1 and IEC-60072-2. 3. Motors shall be designed for a minimum of 25000 hours continuous operation without requiring maintenance 4. The minimum design life of motors shall be 20 to 25 years. 5.

All materials and parts included in the construction of the motor or ancillary equipment shall be new or unused, of current manufacture, of the highest grade, and free from all defects and imperfections likely to affect their performance.

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SPECIFICATION FOR MOTORS

6.

Vendor shall only quote motors which shall have already been successfully type tested in accordance with relevant IEC standards. Type test reports shall be made available, on purchaser request with the bid.

7.

Motors shall be suitable for continuous operation at full load rating under a combined variation of the following voltage and frequency as per IEC 60034-1. Voltage fluctuation

:

Frequency Fluctuation : 8.

±10% of rated Voltage ±5% of rated Voltage

The Vendor shall review the service conditions and shall apply moisture-proofing, anticorrosion protection and/or anti-tropical protection etc. to the motor.

9.

Vibration severity requirements shall comply with IEC 60034-14 grade N.

10. The motor rated Voltage, Phase and frequency shall be as follows. Supply voltage

(LV)

:

415V (+/- 10%)

Phase

:

3 Phase

Frequency

:

50Hz ± 5%

11. All motors shall be designed to operate for a periods of not less than 5 minutes at a voltage of 25% below the rated voltage at rated frequency without injuries overheating. 12. Motors shall be capable of starting (3) consecutive times starting from rated ambient temperature and two (2) consecutive times from rated operating temperature

4.1

Type of Ventilation & Cooling The motors shall generally be of self ventilated, air cooled type. The direction of air flow shall be such that air is not drawn from the direction of the driven equipment.

4.2

Type of Enclosure 1.

Enclosures of motors shall generally be of the totally enclosed fan-cooled (TEFC) type, weather protected IP 56 according to IEC. The degree of protection for Indoor Installation shall be IP31.

2.

The motors for use in explosive gas atmospheres shall be of the following types of construction depending on the classifications of the hazardous locations in which they are to be installed:

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SPECIFICATION FOR MOTORS

A) Motors and their terminal boxes for use in Zone 1 area shall be flameproof enclosure “d” B) Motors and their terminal boxes for use in Zone 2 area shall be Increased safety “e” C) For motors to be installed in hazardous areas, the motors and all auxiliary electrical equipment mounted on the motor shall be certified for use in hazardous area. D) The motor manufacturer shall be contacted for advice as to any special recommendations or precautions that shall be adopted or followed with respect to the starting and normal running of the motor under the expected plant environment and conditions. Any such recommendations shall be fully complied with, and any special operational requirements shall be made known to client. 3.

The motors to be installed in non-hazardous area shall be of the weather protected type.

4.

Enclosures for weather protected type motors shall be designed to prevent entrance of liquids or solid through any openings such as air intakes, air outlets, enclosure joints or shaft extensions and the entrance of moisture and dust through the ventilating system to the enclosures shall be minimized. Motor openings shall be suitably screened to prevent the entrance of harmful materials.

4.3

5.

Frames shall be constructed from cast iron or fabricated steel.

6.

Vertical mounting motors for outdoor use shall have a drip shield over the fan.

Rotor 1. Rotors and external fans shall be balanced. Balance weights, if fitted, shall not be of lead or similar ductile material and the rotor design shall allow for the addition of balancing weights.

2. The vibration in any plane shall not exceed 10 microns (0.010 mm) in total amplitude as measured on the bearing housing at any operating speed. Each motor shall generally be provided with a coupling key on the motor shaft.

4.4

Insulation Class The motor shall be of Insulation class F & the allowable temperature rise shall not exceed that of Class B

4.5

Noise level Page 6 of 10

SPECIFICATION FOR MOTORS

Noise levels shall meet as a minimum of the requirements of IEC-60034-9.

4.6

Bearing and Lubrication 1. Motors shall be equipped with ball and/or roller bearings. When stated on the data sheet or when confirming with Seller's standards, sleeve bearings may be offered. 2. Grease or Oil lubricated bearings shall be used as a minimum. 3. Ball and roller bearings housing shall be such that re-lubrication, if required, can be carried out without stopping the motor. The minimum lubrication levels shall be 4000 hours for horizontal motors and 2000 hours for vertical motors. 4. Grease lubricated motors with re-lubrication facilities shall have a grease relief device to the outside of the motor. 5. To prevent damage to bearings by shaft circulating currents the non drive end bearing shall be electrically insulated from the motor frame, or base plate, if the induced voltage measured between shaft ends exceeds either 250mV rms for ball and roller bearings, or 400mV rms for sleeve bearings. 6. The responsibility of providing the correct bearings to suit the motor type and application shall rest with the motor Seller.

4.7

Terminal Boxes 1. Terminal box shall be located on the right hand side of the motor when viewed from the non drive-end and be capable of being turned in steps of 90 degrees. Vendor's standards shall be considered. 2. Terminal box of space heater or embedded thermal detectors shall be separately provided, if necessary, by Vendor's standard. 3. All motors shall be provided with cast iron terminal boxes which have adequate space for cable termination. Sheet steel terminal boxes may be used for general purpose type motor. Vendor shall submit drawings indicating dimensions of terminal boxes for approval. 4. Terminal in the terminal box shall be clearly and permanently marked with reference letters in accordance with applicable standards. 5. The terminal box and cable gland arrangement shall permit disconnection of the cable from the motor without disturbing the actual cable termination and seal.

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SPECIFICATION FOR MOTORS

6. The motor terminal box shall have IP55 or above weather protection. 7. The main terminal box and auxiliary terminal box shall be separated. 8. The Cable Glands at motor terminal shall meet the requirements of area classification, preferably flame proof.

5.0

ACCESSORIES

5.1

Grounding Terminals 1. Each motor shall be provided with an external grounding terminal on the motor frame and an internal grounding terminal in the motor terminal box. These grounding terminals shall be clearly and permanently marked with the letter "E". 2. Other necessary accessories shall be provided in accordance with the Vendor's standard.

5.2

Name Plate 1. Nameplates shall be of stainless steel. 2. The following shall be provided on the motor frame: 3. The following shall be provided on the motor frame: a)

Nameplate

b)

Item number

c)

Direction of rotation

d)

Instructions for lubrication

e)

Magnetic center

f)

Other necessary information and/or instructions

g)

TAG No. identification

h)

Motor DE/NDE bearing number

4. Rating plate shall be in accordance with IEC except that rating plate for motors in hazardous atmosphere shall be in accordance with NEMA and other applicable standards.

5.3

Finish

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SPECIFICATION FOR MOTORS

1. The exterior shall be thoroughly cleaned, scraped and wire brushed to remove all rust, grease and dirt. Immediately after preparation the exterior shall be primed with one coat of red oxide primer followed by two coats of best quality anti corrosive finishing paint. 2. The color of the finish shall comply with the specific job requirement.

6.0

TEST AND INSPECTION 1. Inspections by the Engineer or his assigned representative during manufacturing and witnessing of test are included in the scope of supply. Listed below are the main tests to be performed: -

locked rotor test

-

No-load test

-

Starting test

-

Insulation resistance test

-

Resistance measurement

-

Phase Sequence

2. The Contractor shall specify the expected values for type tests and special tests and produce certification documents. Upon request the Contractor shall perform type tests, such as: -

Vibration

-

Noise

-

Temperature rise

-

Resistance

-

Efficiency

-

Power Factor

-

Momentary Overload

3. Relative to the tests performed, the Contractor shall deliver test certificates. 4. For the flameproof and increased safety motor a "Certificate of Conformity" according to CENELEC shall be delivered for every motor.

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SPECIFICATION FOR MOTORS

7.0

GUARANTEE & DELIVERY REQUIREMENTS 1. Storage and Preservation Requirements As required by COMPANY. 2.

Performance CONTRACTOR shall guarantee satisfactory continuous operation at any point over the full operation range. The package performance shall be guaranteed at the normal operating point.

3.

Warranties and Guarantees As defined in the project General Conditions and Data Specification.

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