what is cogging and crawling
Answer Posted / shruti mistry
Cogging
When no.of slots of rotor and stator are equal , then a magnetic interlocking takes place and motor does not start. lt occurs during starting of motor.
Crawling
In this phenomenon motor starts to run stably at speed lower than the rated speed due to presence of harmonics. It occurs during running of motor.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
what is the operating time for LBB and how does the LBB relay realise whether cb is opened or not?
After synchronization with grid what is the demand value QKVAR and how we will maintain that?
Draw the vector diagramme for Asynchronous Induction Generator at noload,half load and fullload.
WHAT IS MEANT BY SHEATH VOLTAGE IN 132Kv cable?
What is the Surge suppresor? Why using in a UDB's and How it works?
Explain the term parallel path in dc machin ?
what is the k var ratting of 1250kva
What is depreciation factor?
when we decide to use soft starter drive or vfd drive in mcc to operate apump?
how can maintain the power factor and why and this is how do work tell us
Do u know any one? how to find out in motor rated amps? formula?
what is the minimum voltage require to injure our body?
how we can calcultae the short circuit level for bus bar
How the setting of the vector surge relay shall be calculated when the relay is to be used for Grid islanding application?
A 3 phase transformer's (Y-Y) Y and B phase is (Y and B connection not broken) broken from neutral and R and Nutral connection is ok, what will be the relay tripping and why