ericsson
ericsson
Branch Unspecified
14 Jan 2011

What is FIR relay in Transformer

I have faced this question in an interview, what is the use of FIR relay in transformer....?

if anybody knows please explain me..
thanks
regards
ericsson
vasanthmbs

vasanthmbs

Branch Unspecified
10 years ago
FIR relay is induction relay..... same as other relays..
aj_onduty

aj_onduty

Branch Unspecified
8 years ago
I am getting curious about this. How does it protect the transformer? what is its full form? What is its basic principle?How is its working?
I am not expecting a full explanation about it, but I just want a basic knowledge about it. At-least give me the full form of it.
I would be happy if anyone answers this.
Thank you for trying to answer me(in advance).
d_vipul

d_vipul

Branch Unspecified
8 years ago
[​IMG]

CHECK OUT THIS DIAGRAM FOR MORE DETAILS..................

Regards,
VIPUL
Arp

Arp

Branch Unspecified
8 years ago
FIR (Finite Impulse Response) filter banks recognize the distortion of the voltage and current waveforms caused by the arcs usually associated with HIF, by yielding 3 phase voltage and current at a set frequency and inspecting the pattern displayed against a pre set pattern, usually based on an algorithm.
freak16

freak16

Branch Unspecified
8 years ago
@ARP
Can you please tell what is HIF?
Arp

Arp

Branch Unspecified
8 years ago
High impedance faults (HIF) are faults which are difficult to detect using standard overcurrent protection relays for earth and phase fault detection.

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