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STARTING
/ SPEED CONTROL / BUFFER RESISTOR FOR MOTORS: |
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For
starting / Speed Control of A.C or D.C. Motors, resistors are
manufactured as per customer’s requirement at specified
starting torque or for limiting initial inrush current to an acceptable
value. Mainly these are used for cranes. Rating can be 2 minute,
5 minute, 10 minute, continuous or intermittent. Material of resistor
is normally Stainless steel AISI-304, AISI -410 or AISI 430 or
FeCrAl-AISI-406. |
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QUALITY: |
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Standards
Followed: |
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IPSS-1-10-002-82 with amendment no.1 and BS 587 for starting
/ speed control resistor.
- IS
2147 & IS 12063 of 1987 for degree of protection for enclosure.
- IS
5 for paint shade.
- Any
other standard as required can also be followed.
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TESTS:- |
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(A).
ROUTINE TESTS: - FOLLOWING TESTS WILL BE CONDUCTED. |
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- Visual
and Dimensional
-
Insulation resistance value measurement by using 500V megger
before and after dielectric test.
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Resistance value measurement with ± 10 % tolerance.
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H.V. Test of twice the rated voltage +1000 volts for voltage
class below 660 volts.
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TYPE
TESTS:- |
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Temperature
rise test i.e., Heat run test if required will be conducted by
passing equivalent / rated current for rated / equivalent time
keeping I²T Constant through a part of Resistor. |
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INFORMATION
TO BE FURNISHED TO US: |
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For
Starting / Speed Control resistor: |
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- Rotor
volts at standstill.
- Rotor
Current at full load.
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Duty rating (Time on / off No. of Cycles).
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Starting Torque in percentage of full load Torque.
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Material of Resistor.
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No. of steps / sections and its resistance values per phase.
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Type of enclosure (Protection Class as per IS-12063).
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Temperature rise allowed.
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Whether terminals should be brought down at one place.
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Details of atmospheric conditions at site.
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For
Buffer resistors : - Rotor
volts at standstill.
- Rotor
Current at full load.
- Percentage
(%) of slip required.
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