Query on Tolerance on Starting Current
Query on Tolerance on Starting Current
(OP)
Can someone please tell me the specific Section of NEMA MG-1 which gives the tolerance for starting current for a LV motor?
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Query on Tolerance on Starting Current
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RE: Query on Tolerance on Starting Current
Is that what you're looking for?
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RE: Query on Tolerance on Starting Current
12.35 LOCKED-ROTOR CURRENT OF 3-PHASE 60-HERTZ SMALL AND MEDIUM SQUIRRELCAGE
INDUCTION MOTORS RATED AT 230 VOLTS
12.35.1 60-Hertz Design B, C, and D Motors at 230 Volts
The locked-rotor current of single-speed, 3-phase, constant-speed induction motors rated at 230 volts,
when measured with rated voltage and frequency impressed and with rotor locked, shall not exceed the
values listed on the next page.
and this...
12.35.2 50-Hertz Design B, C, and D Motors at 380 Volts
The locked-rotor current of single-speed, 3-phase, constant-speed induction motors rated at 380 volts,
when measured with rated voltage and frequency impressed and with rotor locked, shall not exceed the
values shown in Table 12-1.
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RE: Query on Tolerance on Starting Current
RE: Query on Tolerance on Starting Current
So if it is called a kva code B, my take is that it should be below the max number for B and above the max number for A.
(By the way, dont' confuse KVA code letter with NEMA design letter).
Again - just my understanding from reading NEMA MG-1 which is not exactly easy reading. If anyone else has any other insights, I'd be interested to hear them.
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RE: Query on Tolerance on Starting Current