K6EL

Ground Fault Relay

K6EL

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

* Information in this page is a reference that you created on the basis of information in the product catalog before the end of production, may be different from the current situation, such as goods for / supported standards options / price / features of the product. Before using, please check the compatibility and safety system.

last update: November 21, 2022

Ground Fault Relay Ratings

Type		High-speed models		Delayed models
Control power supply		100/110 VAC or 200/220 VAC, 50/60 Hz (same for all)
Rated current		Depends on the ZCT
Sensed current		50% to 100% of the rated sensed current
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.
Built-in contacts	Contact form	SPDT+SPST-NO
	Carrying current	5 A
	Rated load		cosφ = 1	cosφ = 0.4 (L/R = 7 ms)
		240 VAC	5 A	2 A
		110 VDC	0.3 A	0.2 A
		30 VDC	5 A	3 A
		Minimum applicable load: 5 VDC, 10 mA (reference value)
Power (VA) consumption		3 VA max.
Weight		Approx. 110 g

Ground Fault Relay Characteristics

Type	High-speed models	Delayed models
Operating time	Less than 0.1 s	0.3 s/0.8 s (switchable)
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.

last update: November 21, 2022

Product Category

Power Supplies / In Addition
- Measuring / Motor Protective Relays
  - Discontinued
    - K6EL

Top of page