Interlocking Current-leakage Protection System type ER 600 im
The ER 600im type protection is used to control isolation status in isolated medium-voltage power networks with average voltage of 3.3 kV, as a blocking protection. The measuring circuit of the ER600im protection can interoperate with the controlled network only by means of the integrated set of ER600d chokes and has the following function:
- Signalling when the insulation condition falls below the set reference value, the controlled release time relay is released, whose contacts signal tripping or prevent reclosing a circuit breaker or a contactor energising a controlled section of the network.
Explosion protection
Marking
I M2 [Ex ib] I Mb
Ambient temperature
-20°C to +70°C
Certificate
OBAC 11 ATEX 441U
Rated values
Ingress protection rating
IP20
Supply voltage
230 V or 42 V AC ± 20%
Power input
1 VA
Test voltage
24 V DC ±5%
Rated voltage of controlled network
up to 3600 V AC,
Maximum output current of the measuring circuit
Io=0.214 mA
Internal inductance ER600d (U = 25.2 V)
Li = 5500 H
Internal inductance ER600z (U = 25.2 V)
Li = 1930 H
Internal capacity
Ci – negligible
Setting range for network 3.3 kV
220 kΩ ± 20%
Tripping time
<70 ms
Contacts
2 switching contacts
Switching voltage
max. 250 V AC/DC
Switching current
Imax 5A
Coding
ER 600 im – Interlocking Leakage Protection
Other parameters, including intrinsically safe ones, are included in the instruction manual available on the manufacturer’s website.