Interested to Buy Any Domain ? << Click Here >> for more details...
What is negative phase sequence?
- 7 Answers
- 92733 Views
- Hindalco, Universal Associate, I also Faced
- E-Mail Answers
Answer Posted / sunil kumar sinha
In a three phase AC circuit, current is consetuted of
positive sequence, negative sequence and zero sequence
current.
the positive phase sequence current flows as perr the load
connected to the circuit. The negative phase sequence
current will flow due to diffence of three phase volages of
the system.If no difference of R Y B voltage is present,
the negative sequence current will not flow. The negative
phase sequence current present in the circuit will be of
same frequency but the phase sequence will be negative to
the system sequence. Negative sequence current will cause
excessive heating of generator rotor as the rotor will
experience double the system frequency so far the negative
sequence current is concerned. The zero sequence current is
present only in case of earth fault otherwise it is absent.
| Is This Answer Correct ? | 176 Yes | 16 No |
Post New Answer View All Answers
Name the types of motors used in vacuum cleaners, phonographic appliances, vending machines,refrigerators, rolling mills, lathes, power factor improvement and cranes.
We need to current density & short circuit calculation at 65kA for aluminium & copper busbar.
What is the resonant peak?
PLZ EXPLAIN CORONA,SKIN,BIRD PALE,SPAN,SAG Effects of power cable.
how we calculate the dick for a pole?
What is the rating of a circuit breaker needed for 300 kv load in 33KV supply line of 33/415 transformer ? Whether 800/1200 amp vaccum circuit breaker can perform for a 33 KV line in input in 415 volt in output of the transformer ?
Can we use shunt trip coil instead of trip coil with protection relay for protection?
how to decide the panel size like MDB ,SMDB PANEL SIZES
Explain the advantages and disadvantages of thermal power plant?
Why does amplifier gain reduce?
what is sustainable current of any conductors . a bare busbar or pvc cable has different sustainable current .
in non technical way how can u define POWER FACTOR??
Why water bubbles when D.C. Current is passed through it? Why not when A.C. Current is passed?
why and where we use early make & late break contacts in protection?
What is the method for testing the differential protection stabilty in generator? When the time of starting What will happen if differentail protection connection wrong means?
