Auxiliary, trip and supervision relays
2L10 / 2L11 Battery Earth Fault Relays
- Wide range of battery voltages catered for
- High sensitivity
- 2L11 model differentiates between positive & negative earth faults
- Low burden
- Fast operate time
- High output contact rating with optional magnetic arc blowouts
- Optional hand reset flag
- Size 2M draw out case
Sub-station battery supplies are critical to the correct operation of critical protection & other functions. The 2L10 & 2L11 are designed to operate on earth faults or degradation of the insulation to earth of a battery or other DC supply which has neither pole connected to earth.
The relay earths the battery through a high resistance with a consequent limit to the earth fault current.
It should be noted that the relay will not operate for an earth fault to the centre of the battery.