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High sensitive current operated Earth Leakage Circuit Breakers are designed to give protection by disconnecting the supply against risk of dangerous & possible lethal electronic shocks. It detects dangerous leakage current exceeding the generally accepted safe limit of 30 ma & isolates the effected section of installation. It confirms to BS standard 4293:1983.
high sensitive current operated Earth leakage Circuit Breaker incorporates an active current transformer, to sense the sum of all current to be normally zero. Any leakage to earth is sensed as unbalance creates small voltage signal in secondary winding fed to highly sensitive electronic circuit, where it actuates the relay which triggers the tripping mechanisms of MCB.
The sensitivity of current operated EL + MCB & Shockguard (ELCB) is usually stated in terns of their rated tripping current, say generally accepted limit of 30 mA (can be upto 100 mA). It trips within 30 msec when leakage exceeds the safe limit.
It can be easily reset by MCB lever. It also gives High/Low voltage protection (optional). Shockguard (ELCB) does not provide overload and short circuit protection. It has High/Low voltage protections.
To check the operation of the EL+MCB & Shockguard (ELCB), test CKT is incorporated, By pressing push button on from side, artificial leakage is created. Electronic circuit senses the leakage current & trips the EL+MCB & Shockguard (ELCB) in order of sensitivity.
To check the operation of the EL+MCB & Shockguard (ELCB), test CKT is incorporated, By pressing push button on from side, artificial leakage is created. Electronic circuit senses the leakage current & trips the EL+MCB & Shockguard (ELCB) in order of sensitivity.
| Description | Load Current Rating | System Voltage | Sensitivity Variable | Tripping Time | Load Breaking Device | Frequcncy | Overload & Shorcircuit Protection | No Of Poles | Relevant Standard |
|---|---|---|---|---|---|---|---|---|---|
| Suraksha (EL + MCA) |
16A/25A/32A | 230 V AC 1ø |
3.50 mA | < 30 ms | MCB | 50 HZ | Yes | 2 | B-4293 - 1983 / IS 12640 - 1988 |
| Shockguard (ELCB) | 32 A | 230 V AC 1ø |
3.50 mA | < 30 ms | Relay | 50 HZ | ... | 2 | ... |
| Shockguard (ELCB) | 32 A | 415V AC. 1ø |
30 - 100 mA | < 30 ms | Relay | 50 HZ | ... | 4 | ... |