Topic: Protective Relay Study
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Answers to Common Questions
How Do Protective Relays Work?
A protective relay works like a normal relay as long as the current running through the circuit is nominal and within the parameters for the particular circuit. An automobile or a house circuit will work identically for all practical purpos... Read More »
Source: http://www.ehow.com/how_4886499_protective-relays-work.html
What is LBB protection Relay?
LBB is local breaker protection Read More »
Source: http://wiki.answers.com/Q/What_is_LBB_protection_Relay
What is protective relaying?
Answer A protective relay is a complex electromechanical apparatus, often with more than one coil, designed to calculate operating conditions on an electrical circuit and trip circuit breakers when a fault was found. Unlike switching type r... Read More »
Source: http://wiki.answers.com/Q/What_is_protective_relaying
More Common Questions
Answers to Other Common Questions
Relay are operated by small current /voltage connected to Secondary side of Current Transformer and /or Voltage Transformer. The signal stimulates the magnetic substance nearby with the attracting force. This closes or opens the circuit bei...
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Source: http://wiki.answers.com/Q/How_relay_used_for_protection_purpose
Well any type of relay protection is extremely complicated any many people will spend their whole career learning about protection and control. But a distance relay essentialy looks at the impedance of the circuit to be protected. When a fa...
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Source: http://wiki.answers.com/Q/How_does_distance_protection_Relay_work
Auxiliary relay is a relay which will repeat the operations of protective relay such as tripping, time lag, breaking of trip circuit current, giving alarms and showing flags etc.. Protective relay contacts are delicate and light weight henc...
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Source: http://wiki.answers.com/Q/What_is_the_function_of_auxiliary_relay...
The distance relay trips when a fault occurs at a distant or a remote place in the electric transmission line. There is a mechanism based on the impedance calculation of the distance of the transmission line after which it is accurately kno...
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Source: http://wiki.answers.com/Q/How_does_a_distance_protective_relay_wo...
the P63X series transformer differential relays are good funtional relays, but the software is different than the Micom PX2X and PX4X series relays. Not worse or better, just a different format. Functionally it provides adequate protection ...
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Source: http://wiki.answers.com/Q/How_p632_micom_relay_protect
Current transformers (CTs) are used to monitor the current (or lack of) in high-voltage systems, and their secondary outputs controls the behaviour of protection-system relays. The CTs (1) reduce the current to values that match the current...
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Source: http://wiki.answers.com/Q/Why_current_transformers_are_required_i...
50 is the ANSI device number for an instantaneous overcurrent relay. The G suffix stands for "ground." A 50G protection relay trips the circuit breaker without time delay when it detects a ground fault on the circuit.
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Source: http://wiki.answers.com/Q/What_is_50G_protection_relay_mean
