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I think that the questioner is asking what is the difference between an isolator and a circuit breaker.
A circuit breaker is a switching device designed to interrupt a fault current.
An isolator is not intended to break a live circuit but, rather, to provide a visible separation between a circuit component and live conductors.
For example, isolators (or 'disconnectors' in US parlance) are located on either side of a high-voltage circuit breaker. If the circuit breaker requires maintenance, then the procedure is to:
a. trip the circuit breaker.
b. open the isolators on each side of the circuit breaker, so there is a visible gap between the circuit breaker and the 'hot' conductors.
c. apply temporary earths (grounds) between each isolator and the circuit breaker.
d. complete a 'permit to work' card.
e. begin work.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoCircuit breakers are overcurrent protective devices, so must be capable of interrupting a fault current, and closing onto a fault, without damage to the circuit breaker. Circuit breakers are also used to interrupt load currents. Isolators are generally designed to disconnect circuits on 'no load' -that is when there is no current is flowing through the circuit; their function is simply to provided a physical break between the load and the supply once the circuit has been interrupted by a load-breaking device such as a circuit breaker.
Wiki User
∙ 11y agoA circuit breaker is designed to (a) interrupt load current, and (b) to interrupt a fault current. An isolator(called a 'disconnector' in North America) is not designed to interrupt a current, but to provide a visible break in a circuit, after the current has already been interrupted.
Wiki User
∙ 10y agoAn isolator is not designed to interrupt a load current and, so, is opened after a circuit has been interrupted using a circuit breaker, and closed before a circuit breaker restores that circuit. An isolator is used to provide a visible break between the part of the circuit on which work is to be carried out, and any energised part.
A circuit breaker is designed not only to interrupt a load current, but to interrupt and close onto a fault current, which is many time greater in magnitude than a laod current.
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Is the main circuit breaker is a sum of the sub circuit breaker?
Typically yes because that is what makes sense. However, the subpanel could have the same size breaker as long as the panel were rated for that amperage and the wire sizes were appropriate.
How ate a riverbed different from a circuit?
How are circuit And a river bed different
Can different rating circuit breakers have the same short circuit characteristics?
Yes, different amperage rating circuit breakers can have the same short circuit characteristics.
How parallel and series circuit different?
In a series circuit, current has to pass through each part of the circuit. In a parallel circuit, the current has several alternative paths.
How are series parallel circuits different?
A series is an electric circuit with a single path.A parallel circuit is an electric circuit with multiple paths.
Is the main circuit breaker is a sum of the sub circuit breaker?
Typically yes because that is what makes sense. However, the subpanel could have the same size breaker as long as the panel were rated for that amperage and the wire sizes were appropriate.
Why is a resistor needed to discharge or charge a capacitor in an electric circuit?
A resistor may be used in series charging for current limiting, filtering, or as a signal isolater. Resistors across caps are to discharge them for your safety or equalize voltages across the caps in series filtering circuit.
When was Arno Breker born?
Arno Breker was born on July 19, 1900, in Elberfeld, Wuppertal, North Rhine-Westphalia, Germany.
What actors and actresses appeared in Din - 2004?
The cast of Din - 2004 includes: Miles Boisselle as Man in Elevator Eric Breker as Father Melissa Breker as Mother Tegan Breker as Young Gil Tammy Gillis as Female Cyclist Craig March as Man
Who invented microwave isolator?
Tipeni Sae2 invented the microwave isolater
What is the name of the part that connects motor to motor mounts?
The rubber part is called an isolater.
Do you need an isolator for dual battery setup?
You do not need an isolater, but it is reccomended as without one you can drain your battery connected to your starter (your vehicle won't start). I do not run an isolater, just don't leave your accessories running and the battery won't drain.
What will happend when isolater will open on load?
An 'isolator' (UK terminology) or 'disconnect' (US terminology) are generally not designed to break a load current. The circuit must first be broken using a circuit breaker. If an isolator were to be opened 'on load', then it's likely to draw an arc which it has no means of breaking. The heat produced by that arc is likely, then, to damage the isolator's contacts.
What actors and actresses appeared in De breker - 2011?
The cast of Brot - 2011 includes: Bruno Ganz as Mann Angela Winkler as Frau
How ate a riverbed different from a circuit?
How are circuit And a river bed different
What is the birth name of Freddy Breck?
Freddy Breck's birth name is Gerhard Breker.
Can different rating circuit breakers have the same short circuit characteristics?
Yes, different amperage rating circuit breakers can have the same short circuit characteristics.
