Temporary loss of supply
Temporary loss of supply
(OP)
In your opinion under the following condtions would large motors 300 kw to 4000 kw be able to copewith the following
"Motors shall be capable of recovering normal operation in the event of a system disturbance causing temporary loss of supply voltage of periodfs of upto 0.2 seconds ( fault clearance time ) followed by a sudden restoration, intially to 60% rated voltage for 3 seconds, then followed by a sudden restoration to 80% voltage, from which voltage the motors shall then be capable of accelerating and ulitmate recovery under the most arduous conditions. )Pump full load, open discharge )"
Your thoughs would be welcome, thanks
"Motors shall be capable of recovering normal operation in the event of a system disturbance causing temporary loss of supply voltage of periodfs of upto 0.2 seconds ( fault clearance time ) followed by a sudden restoration, intially to 60% rated voltage for 3 seconds, then followed by a sudden restoration to 80% voltage, from which voltage the motors shall then be capable of accelerating and ulitmate recovery under the most arduous conditions. )Pump full load, open discharge )"
Your thoughs would be welcome, thanks





RE: Temporary loss of supply
Motor designer should calculate the torque-speed characteristics based on the pump torque-speed curve in order to have a motor capable of doing it
You can calculate the motor speed after the 0.2 seconds failure, and so you also know motor torque capability (at the specified voltage). If the load torque demand is higher than motor capability, the motor will not recover the full speed.
RE: Temporary loss of supply
RE: Temporary loss of supply
RE: Temporary loss of supply
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