K6EL

Economical, Compact, High-performance, DIN 48 × 48-mm Ground Fault Relay for Low Voltages

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Ground Fault Relay Ratings

Type		High-speed models		Delayed models	Delayed high-sensitivity models
Control power supply		100/110 VAC or 200/220 VAC, 50/60 Hz (same for all) (See note 1.)			100 VAC
Rated current		Depends on the ZCT
Sensed current		50% to 100% of the rated sensed current (50 mA ±10%, 150 mA ±20%) (See note 2.)
Non-operating current		0% to 50% of the rated sensed current
Rated short-time current		2,500 A
Ground fault indication method		LED (red)
Test method		Relay operation confirmed using a test button. (Independent of ZCT connection.)
Reset method	Manual	Either press the reset button or turn the control power supply OFF and ON again.
	Automatic	Automatically resets when the ground fault is cleared.
Built-in contacts	Contact form	SPDT+SPST-NO			SPDT
	Carrying current	5A			3A
	Rated load		cosΦ = 1	cosΦ = 0.4 (L/R = 7 ms)	cosΦ = 1
		240 VAC	5A	2A	220 VAC, 3 A
		110 VDC	0.3 A	0.2 A
		30 VDC	5A	3A
Power (VA) consumption		3 VA max.
Weight		Approx. 110 g

Note:

1. The K6EL-R50 requires a 100-VAC control power supply.

2. Only the K6EL-R50 can be switched between 50 mA ±10% and 150 mA ±20%.

Ground Fault Relay Characteristics

Type	High-speed models	Delayed models	Delayed high-sensitivity models
Operating time	Less than 0.1 s	0.3 s/0.8 s (switchable)	Less than 0.5 s
Inertial non-operating time	---	0.1 s when set to 0.3 s 0.5 s when set to 0.8 s

Control power supply range	80% to 110% of the control power supply voltage
Operating temperature range	-10 to 55 °C (with no icing)
Operating humidity range	45% to 85% (with no condensation)
Insulation resistance	5 MΩ min. at 500 VDC (between charged parts and the mounting panel)
Dielectric strength	1,500 VAC, 50/60 Hz for 1 min (between charged parts and the mounting panel)
Lightning impulse dielectric strength	1.2/50 μs, 7,000 V (between control power supply terminals)
Lightning impulse operation failure	1.2/50 μs, 7,000 V (primary side of ZCT)
Vibration resistance	Destruction: 16.7 Hz, 4-mm double amplitude for 1 min
Shock resistance	98 m/s²

Note: The range for an operating time of 0.3 s is 0.15 to 0.45 s and the range for an operating time of 0.8 s is 0.6 to 1.2 s.

ZCT (Zero-phase Current Transformer)

Structure	Indoor through-type models						Indoor separate-type models
Model	OTG-L21	OTG-L30	OTG-L42	OTG-L68	OTG-L82	OTG-L156	OTG-CN52	OTG-CN77	OTG-CN112
Rated current	50 A	100 A	200 A	400 A	600 A	1,000 A	200 A	400 A	600 A
Diameter of through-hole	21 mm	30 mm	42 mm	68 mm	82 mm	156 mm	52 mm	77 mm	112 mm
Rated voltage	600 VAC max., 50/60 Hz, single-phase/three-phase
Output terminal polarity	None (The ZCT's output terminals k and l can be connected to either input terminals 3 or 4 of the Relay.) (See note.)
Insulation resistance	100 MΩ min. (between charged metal parts and ground)
Dielectric strength	2,200 VAC, 50/60 Hz for 1 min (between charged metal parts and ground)
Ambient operating temperature	-10 to 60 °C (with no icing)
Weight	Approx. 90 g	Approx. 130 g	Approx. 230 g	Approx. 480 g	Approx. 700 g	Approx. 6.6 kg	Approx. 1.3 kg	Approx. 2.5 kg	Approx. 3.5 kg

Note: Do not connect ZCT output terminals k and l to ground. Doing so may result in damage to the Relay.

Caution: In the interenst of product improvement, specifications are subject to change without notice.

In Addition