Shunt
- Thread starter jamal
- Start date
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- Location
- Bremerton, Washington
Re: Shunt
Are your referring to a GFPE service with a shut trip circuit breaker or a simply a shut trip circuit breaker?
Are your referring to a GFPE service with a shut trip circuit breaker or a simply a shut trip circuit breaker?
Ed MacLaren
Senior Member
Re: Shunt
The shunt trip feature enables a circuit breaker to be "tripped" by the operation of an external sensor, instead of, and sometimes in addition to, the normal "series" integral thermal and magnetic trip units.
The external sensors can be any type that can initiate a contact closure, such as overcurrent, ground fault, undervoltage, phase loss, etc.
A small solenoid built into the breaker mechanically unlatches the main contacts when supplied with voltage from the external control voltage source. This control voltage is often taken from an emergency power source so that the breaker can be operated manually in the event of main power failure.
Ed
The shunt trip feature enables a circuit breaker to be "tripped" by the operation of an external sensor, instead of, and sometimes in addition to, the normal "series" integral thermal and magnetic trip units.
The external sensors can be any type that can initiate a contact closure, such as overcurrent, ground fault, undervoltage, phase loss, etc.
A small solenoid built into the breaker mechanically unlatches the main contacts when supplied with voltage from the external control voltage source. This control voltage is often taken from an emergency power source so that the breaker can be operated manually in the event of main power failure.
Ed
hurk27
Senior Member
- Location
- Portage, Indiana NEC: 2008
Re: Shunt
Ed you forgot one other use for a shunt trip
Ansel system for a hood over a cooking area in a resturant. to shut down all appliances under the hood.
Ed you forgot one other use for a shunt trip
Ansel system for a hood over a cooking area in a resturant. to shut down all appliances under the hood.
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