Why circuit breakers are used in substation?

Why circuit breakers are used in substation?

Circuit breakers are used to open and close circuits. They can be operated manually to perform maintenance or will automatically trip if a short circuit occurs. This function in the power system is similar to that of the fuses or breakers in a household distribution panel.

What is GE circuit breaker?

GE – General Electric – Miniature – Circuit Breakers. GE – General Electric – Molded Case – Circuit Breakers. Circuit Breakers. A circuit breaker is an automatically-operated electrical switch designed to protect an electrical circuit from damage caused by excess current.

Which type of relay is used in substation?

Definite time relays. Inverse time relays with definite minimum time(IDMT) Instantaneous relays….Relays for Transmission & Distribution Lines Protection.

SL	Lines to be protected	Relays to be used
4	33 KV lines	Non-directional IDMT 3 O/L and 1 E/L relays.
5	11 KV lines	Non-directional IDMT 2 O/L and 1 E/L relays.

How do I know what type of circuit breaker I have?

Circuit breakers have markings stamped on the side of them and are usually located inside the panel cover door. There is a label that will tell you what type of breaker is needed for installation in that particular panel.

What is current transformer in substation?

Current transformers are used for protection, measurement and control in high-voltage electrical substations and the electrical grid. Current transformers may be installed inside switchgear or in apparatus bushings, but very often free-standing outdoor current transformers are used.

Does GE still make circuit breakers?

5, 2016 – ElfaPlus*, a miniature circuit breaker (MCB) designed and manufactured by GE (NYSE: GE), recently achieved an Underwriters Laboratories (UL) rating, making it a global MCB platform. Suitable for branch circuit device protection, the ElfaPlus platform offers a range of UL489 and UL1077 MCBs up to 63 amperes.