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K8AK-VW

Single-phase Overvoltage/Undervoltage Relay

K8AK-VW

Ideal for Voltage Monitoring for Industrial Facilities and Equipment. Monitor for overcurrents and undercurrents simultaneously.

Input Range

Model Range* Connection terminal Setting range Input impedance Overload capacity
K8AK-VW2 0 to 10 V
AC/DC
V1-COM 1 to 10 V
AC/DC
3 to 30 V
AC/DC
15 to 150 V
AC/DC
Approx. 120 kΩ Continuous input at
115% of maximum input.
10 s at 125%
(up to 600 VAC)
0 to 30 V
AC/DC
V2-COM Approx. 320 kΩ
0 to 150 V
AC/DC
V3-COM Approx. 1.6 MΩ
K8AK-VW3 0 to 200 V
AC/DC
V1-COM 20 to 200 V
AC/DC
30 to 300 V
AC/DC
60 to 600 V
AC/DC
Approx. 1.2 MΩ
0 to 300 V
AC/DC
V2-COM Approx. 1.7 MΩ
0 to 600 V
AC/DC
V3-COM Approx. 3.1 MΩ

* The range is selected using connected terminals.

Ratings

Power supply
voltage
Isolated power supply 24 VAC/DC
100 to 240 VAC
Power consumption 24 VAC/DC: 2.0 VA/1.1 W max.
100 to 240 VAC: 4.6 VA max.
Operating value setting range
(AL1 and AL2)
10% to 100% of the maximum value of the setting range
K8AK-VW2:
1 to 10 V AC/DC
3 to 30 V AC/DC
15 to 150 V AC/DC
K8AK-VW3:
20 to 200 V AC/DC
30 to 300 V AC/DC
60 to 600 V AC/DC
Operating value 100% operation at set value
Reset value 5% of operating value (fixed)
Reset method Manual reset/automatic reset (switchable)
Note: Manual reset: Turn OFF power supply for 1 s or longer.
Operating time setting range (T) 0.1 to 30 s
Power ON lock time (LOCK) 1 s or 5 s (Switched using DIP switch.)
Indicators Power (PWR): Green, Relay output (RY): Yellow, Alarm outputs (AL1, AL2): Red
Input impedance Refer to Input Range on previous page.
Output relays Two SPDT relays (NC operation)
Output relay ratings Rated load
Resistive load
5 A at 250 VAC
5 A at 30 VDC
Maximum switching capacity: 1,250 VA, 150 W
Minimum load: 5 VDC, 10 mA (reference values)
Mechanical life: 10 million operations min.
Electrical life:
5 A at 250 VAC or 30 VDC: 50,000 operations
3 A at 250 VAC or 30 VDC: 100,000 operations
Ambient operating temperature -20 to 60°C (with no condensation or icing)
Storage temperature -25 to 65°C (with no condensation or icing)
Ambient operating humidity 25% to 85% (with no condensation)
Storage humidity 25% to 85% (with no condensation)
Altitude 2,000 m max.
Terminal screw tightening torque 0.49 to 0.59 N·m
Terminal wiring method Recommended wire
Solid wire: 2.5 mm2
Twisted wires: AWG16, AWG18
Note: 1. Ferrules with insulating sleeves must be used with twisted wires.
Note: 2. Two wires can be twisted together.
Recommended ferrules
Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact
Al 1-8RD (for AWG18) manufactured by Phoenix Contact
Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color N1.5
Case material PC and ABS, UL 94 V-0
Weight Approx. 150 g
Mounting Mounts to DIN Track.
Dimensions 22.5 × 90 × 100 mm (W×H×D)

Specifications

Allowable operating voltage range 85% to 110% of rated power supply voltage
Allowable operating frequency range 50/60 Hz ±5 Hz
Input frequency range 40 to 500 Hz
Overload capacity Continuous input at 115% of maximum input, 10 s at 125% (up to 600 VAC).
Repeat
error
Operating value ±0.5% full scale (at 25°C and an ambient humidity of 65% at the rated power
supply voltage, DC and 50/60 Hz sine wave input)
Operating time ±50 ms (at 25°C and 65% humidity, rated power supply voltage)
Applicable
standards
Conforming
standards
EN 60947-5-1
Installation environment (pollution level 2, installation category III)
EMC EN 60947-5-1
Safety standards UL 508 (Recognition), Korean Radio Waves Act (Act 10564),
CSA: C22.2 No.14, CCC: GB/T 14048.5
Insulation resistance 20 MΩ min.
Between all external terminals and the case
Between all power supply terminals and all input terminals
Between all power supply terminals and all output terminals
Between all input terminals and all output terminals
Dielectric strength 2,000 VAC for 1 min
Between all external terminals and the case
Between all power supply terminals and all input terminals
Between all power supply terminals and all output terminals
Between all input terminals and all output terminals
Noise immunity 1,500 V power supply terminal common/normal mode
Square-wave noise of ±1 μs/100 ns pulse width with 1-ns rise time
Vibration resistance Frequency: 10 to 55 Hz, 0.35-mm single amplitude
10 sweeps of 5 min each in X,Y, and Z directions
Shock resistance 100 m/s2, 3 times each in 6 directions along 3 axes
Degree of protection Terminals: IP20