Page top

K6EL

Ground Fault Relay

K6EL

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

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
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.