Earth Leakage Relays
Type A and Type B
Earth Leakage Relays are used by OEMs in combination with fault breaking devices such as MCBs and MCCBs, to provide earth leakage detection in special distribution panels under the control of an Authorised Person.
The OEM tests the combination to verify that the total disconnection time is in conformity with EN60947-2 Annex M.
- Adustable trip current and time setting.
- Compact design combined ELRC-1 /... Type A
- Flexible design ELR -3E or ELR-3C used with separately mounted residual current transformer CT-1/... Type A
- ELR-3B and ELR-3B10 with display screen used with separately mounted residual current transformer CTB-1/... Type B
- ELR-3BN Type B standard version 110-240v AC control.
Special versions available on request:
24-48V AC/DC control.
RS485 communication port for Modbus-RTU protocol.
Note: The internal diameter of the CT is selected to accommodate the c.s.a. of the line conductors including the neutral.
Technical data Download this page - pdf
Ordering reference: see below:
For other voltages / formats please contact us
Product Standard: EN 60947-2 Annex M
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ELRC - 1/... Earth leakage relay - Type A Control supply 110-125V ac/dc, 220-240V ac, 380-415V ac |
| Monitoring: Voltage < 415V 50/60Hz |
Internal Contacts Setting Reference Diam. in mm C/O range |
35 1 0.025 < 25 A ELRC-1/35
60 1 0.025 < 25 A ELRC-1/60
80 1 0.025 < 25 A ELRC-1/80
110 1 0.025 < 25 A ELRC-1/110
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ELR-3E Earth leakage relay - Type A Control supply 110-125V ac/dc, 220-240V ac, 380-415V ac |
| Monitoring: Voltage < 415V 50/60Hz |
Modules Contacts Setting Reference
C/O range
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3 1 0.03 < 1 A ELR-3E |
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ELR-3C Earth leakage relay - Type A Control supply 110-125V ac/dc, 220-240V ac, 380-415V ac |
| Monitoring: Voltage < 415V 50/60Hz |
Modules Contacts Setting Reference
C/O range
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2.5 1 0.025 < 25 A ELR-3C |
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CT-1/... Residual current transformer Type A for use with ELR-3E & ELR-3C relays |
| Monitoring: Voltage < 415V 50/60Hz |
Internal Rated Minimum Meas. Reference Diam. in mm Voltage Current in mA |
35 415V 25 CT-1/35
60 415V 25 CT-1/60
80 415V 100 CT-1/80
110 415V 250 CT-1/110
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ELR-3B Earth leakage relay - 0.03 < 3A - Type B Control supply 220-240V ac |
| Monitoring: Voltage < 415V 50/60Hz / CT Type B |
Modules Contacts Control Setting Reference
C/O Supply range |
3 2 230V AC 0.03 < 3A ELR-3B
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ELR-3B10 Earth leakage relay - 0.3 < 10A - Type B Control supply 220-240V ac |
| Monitoring: Voltage < 415V 50/60Hz / CT Type B |
Modules Contacts Control Setting Reference
C/O Supply range |
3 2 230V AC 0.3 < 10A ELR-3B10
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CTB-1/... Residual current transformer Type B for use with ELR-3B & ELR-3B10 relays |
Internal Minimum* Minimum Meas. Reference
Diam. in mm Setting mA Current in mA
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35 30 25 CTB-1/35
60 ≥ 300 25 CTB-1/60
80 ≥ 300 100 CTB-1/80
110 ≥ 300 100 CTB-1/110
160 ≥ 500 100 CTB-1/160
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* Minimum recommended setting for ELR-3B associated with CTB diameter |
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ELR-3BN Earth leakage relay - 0.03 < 10A - Type B Control supply 110-240V ac |
| Monitoring: Voltage < 415V 50/60Hz / CT Type B |
Modules Contacts Control Setting Reference
C/O Supply range |
3 2 110-240V AC 0.03 < 10A ELR-3BN
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CTB-2/... Residual current transformer Type B for use with ELR-3BN relays |
Internal Minimum* Minimum Meas. Reference
Diam. in mm Setting mA Current in mA
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35 30 30 CTB-2/35
60 30 30 CTB-2/60
80 ≥ 100 100 CTB-2/80
110 ≥ 100 100 CTB-2/110
160 ≥ 500 500 CTB-2/160A**
160 ≥ 500 500 CTB-2/160B**
210 ≥ 500 500 CTB-2/210
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* Minimum recommended setting for ELR-3B associated with CTB diameter **For 160mm, two CTs required per relay 160mm available 2nd quarter 2025/ check availability |
