Transducers

Earth-Leakage-Relay ND-Metering-Solutions

Earth Leakage Relays

ELR251

Earth Leakage Relays & Transformers for general earth fault protection

Standard Format:

• DIN rail mount
• From 5mA to 30A
• 3 primary current ranges: 5-100mA; 50mA-1A; 500mA-10A
• Latching facility – manual or auto reset

Parameters Features Applications
• Protection against earth faults
• Adjustable time delay
• Test Facility
• Trip currents & delays can be set
• Remote test & reset

Format Options:

• ELR251 – 110ac Auxiliary
• ELR251 – 230V Auxiliary
• ELR251 – 48Vdc Auxiliary
• ELR251 – 24Vdc Auxiliary
• ELR251 – CT – K2035
• ELR251 – CT – K2070
• ELR251 – CT – K2120
• ELR251 – CT – K2210

Title	Text
Auxiliary Supply	400, 230, 110, 48 or 24 VAC ±15% 3VA 48 or 24 VDC ±15% 3W
Relay Contacts	Single Pole Changeover 10A 230VAC, 2200VA max 1A 230VDC, 30W max
Isolation	Via Transformer
Terminals	4mm2 max. Cable Size
Enclosure	DIN 43880, 3 modules Wide Noryl UL94VO
Rail	DIN EN 50022 – 35mm
Weight	250 gms
Environment	.
Operating	-10°C to 60°C <75% Non Condensing
Storage	-25°C to 70°C < 85% Non Condensing
CT Input	6mA Nominal FS
Trip Delay	100ms to 10 seconds
Repeatability	±2% to VDE0435 ±5% Constant Ambient
Trip Current	5mA – 100mA 50mA – 1 A 500mA – 10 A
Dimensions	84mm x85mm high (inc controls) 48mm along Rail

ELR – Earth Leakage Relays	ND Part Numbers
ELR251 – 110Vac Auxiliary	ELR251-110Vac
ELR251 – 230Vac Auxiliary	ELR251-230Vac
ELR251 – 48Vdc Auxiliary	ELR251-48Vdc
ELR251 – 24Vdc Auxiliary	ELR251-24Vdc
ELR251 CT – K2035	XFR/K2035
ELR251 CT – K2070	XFR/K2070
ELR251 CT – K2120	XFR/K2120
ELR251 CT – K2210	XFR/K2210
Kit – ELR251 plus K2035
Kit – ELR251 plus K2070
Kit – ELR251 plus K2120
Kit – ELR251 plus K2210

Core Balance Current Transformers (CBCTs)

Ref	Trip Range	Internal Size mm	Hight mm	Max Depth mm	Weight Net (Gross) gms
K2035	5mA to 100mA 50mA to 1 A 500mA – 10 A	38 dia.	74	40	65 (75)
K2070	50mA to 1 A 500mA – 10 A	70 dia.	117	40	110 (130)
K2120	50mA to 1 A 0.5 A – 10 A	120 dia.	172	40	187 (238)
K2121	0.5 A – 10 A	120 dia.	172	75	187 (238)
K2210	0.5 A – 10 A	210 dia.	271	75	1510 (1675)
K1020	0.5 A to 10 A	72 x 290 mm	180	45	6000
K1021	1 A to 30 A	72 x 290 mm	180	45	6000

Transducers

Earth Leakage Relays

ELR251

Download ELR251 Brochure:

For manual(s) please contact us below:

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