Definition Of Discrimination Electrical

I have always and still do believe that the only way to asses discrimination between two such devices is to compare.

Definition of discrimination electrical. Electrical discrimination is when a smaller circuit breaker fuse located closer to an electrical fault operates before a bigger circuit breaker which is further away from the fault. Discrimination or protection system coordination is an important aspect of an electrical system design that is often overlooked. Discrimination don t leave it too late. The time selectivity in the case of large circuit breakers for the protection of installations is realised by delaying the magnetic tripping time by a few.

If current selectivity can not be achieved as for example between two quick acting circuit breakers having practically the same reaction time selectivity is to be realised via the adjustable delay time of the breakers. This is the result of the implementation and optimisation of three different techniques. However the switchboards and panelboards. Total discrimination as a standard for optimum continuity of supply compact ns mccbs provide a high level of discrimination in electrical installations.

Discrimination is the practice of selecting protective devices and adjusting their settings in order to limit interruption to electrical installations under fault conditions. When the devices in a distribution path are coordinated it reduces nuisance tripping and makes it easier to identify where a fault has occurred. Electrical discrimination occurs when a protective device near a fault or short comes on and keeps the other circuits working properly. Should a fault occur only the circuit breaker immediately upstream from the fault will trip hence continuity of supply is guaranteed for the other feeders.

Natural discrimination with compact nsx circuit breakers due to the roto active breaking technique employed by the compact nsx the combined use of schneider electric circuit breakers provides an exceptional level of protection discrimination. Discrimination that occurs because of one or more of the above characteristics is unlawful under the equality act. The ideal time to complete a discrimination study is before ordering the switchboard and panel board circuit breakers. On the same subject schneider electric s technical department recently told me to use time current characteristics to verify if discrimination under short circuit will be achieved between an upstream fuse and downstream mccb.

Discrimination as per iec 60947 2 can be defined as follows.