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please see details in this site
http://electricalandelectronics.org/2009/03/17/negative-phase-sequence-relay/
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How Negative phase sequence relay work?
How Negative phase sequence relay work
What is the definition of negative phase sequence relay?
negative phase relay is used for the protection against unbalanced condition in a basic model a wheastones bridge is used with the operating coil connected across it.when any fault occurs unbalance will occur in the system and the relay will operate
What is the Mechanism of negative phase sequence relay?
A negative sequence relay is looking at unbalanced current, such as what would result from a line to line or line to ground fault. I'm not sure what you're meaning by "mechanism". Please explain if the above doesn't answer your question.
What is phase failure relay?
These relay sense the Negative Sequence Voltage components of system supply & offers protection against Phase Failure, Phase Sequence Reversal with Under/Over Voltage conditions which are dangerous to motor winding and cause motor burnouts.
What will happen if negative sequence relay is absent in generator?
The flux capacitor will overload and you will fail to reach 88 mph.
Who developed the first relay operated computer?
Howard Aiken developed the first relay operated computer that is Howard Mark II.
What is a phase overload relay?
only the single phase monitored at which it installed
What is CT operated electronic relay?
CT (Current Transformer ) is essential whether is electronic relay or electromagnetic relay. A relay requires the CT to sense the line current.
How is a IDMT relay used to give protection against a phase to earth fault a phase to phase fault on a feeder?
As with any IDMT relay the higher the fault current the quicker the trip time.
Is relay an active or passive device?
Yes, it is an electrically operated switch.
3 phase reverse relay can be utilized for motor control speed?
3 phase reverse relay can be utilized to control 480V motor 60HZ for controlling their speedspeed.
What is directional protection relay and how is it works?
Directionalized relays are relays that use a polarizing circuit to determine which "direction" (in the zone of protection, or out of the zone protection) a fault is. There are many different types and different polarizing methods - ground polarizing, voltage polarizing, zero sequence voltage polarizing, negative sequence polarizing, etc. The basic operation of this relay is just like any nondirectional relay, but with an added torque control - the directionalizing element. This element allows the relay to operate when it is satisfied that the fault is within the zone of protection (ie not behind where the relay is looking).
