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

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

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

Operating Instructions



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
       3	             1	         0.03 < 1 A	           ELR-3E

Operating Instructions



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
      2.5	             1	         0.025 < 25 A	           ELR-3C

Operating Instructions




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

Operating Instructions


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

Operating Instructions


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

Operating Instructions

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
       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
 * Minimum recommended srtting for ELR-3B associated with CTB diameter