what's the different between ELCB, ELR and ELS?
- 1 Answers
- 32218 Views
- CP, I also Faced
- E-Mail Answers
Answer Posted / asif mansoori
All 3 devices are used for protection from Earth Faults.
Earth Leakage Circuit Breaker is used for putting the circuit off in case any residual current passes out of the circuit & the difference is more than the rating of leakage current, e.g. 300mA, the circuit breaker will go off or cause the main circuit breaker to trip. Usually ELCB is comprising of one main circuit breaker and leakage breaker.
Nowadays, MCB+RCCB acts as RCBO or ELCB. If you use RCCB alone, only protection from leakage current is achieved, if you use both MCB & RCCB, then you get protection from both overload, short circuit and leakage.
ELR is earth leakage relay which is available standalone relay with dry contacts for externally tripping the main circuit breaker.
ELS is also type of ELR, but this is sensor & rating of this is lesser than ELR. For smaller leakage currents, ELS is used.
ELCB-Earth Leakage Circuit Breaker
ELR- Earth Leakage Relay
ELS- Earth Leakage Sensor
| Is This Answer Correct ? | 28 Yes | 1 No |
Post New Answer View All Answers
What is time invariant system?
any one please tell taht what type questions will be asked in BHEL interview, i am having interview on 24th Dec, please send this to mail pradeepsistam@yahoo.co.in
what is the constructional difference between a power transformer and potentian transformer?
which connection is safer series or parallel?usually which connection we prefer at home?
WE HAVE THE DC RECTIFIER 1500A, INPUT VOLTAGE IS 3 PHASE. HOW TO CALICULATE THE LOAD? 3 PHASE SIDE EITHER dC SIDE. PLEASE SUGGEST ME
for opening electrical shop, tips needed.
What is super thermal power plant? and how it will differ from normal thermal power plant
what is the calculation method to design core and winding of a 200kva 3phase distribution transformer?
in HT service 3ph 4 wire service Y-phase voltage shows zero . whether it is meter fault? or what be the reason ? if y-ph voltage zero ,can current is recorded? reasons for failure?
WHAT HAPPENED DC SERIES MOTOR FIELD WINDING OPEN. CAN POSSIBLE.
how to select fuse rating for a 3-phase motor ???
how the B-H loop obtain under the static condition
Can I use distributon class/transmission class Lightning arresots for protecting the building? If not why please explain?
What is critical disruptive voltage?
What is the earth treantment procedure?
