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■ Specifications
Allowable power supply voltage range
Allowable power supply frequency range
Input frequency range
Overload capacity
Setting error
Operating value
Reset value
Operating time
Startup lock time
Repeat error
Operating value
Reset value
Operating time
Startup lock time
Temperature influence
Humidity influence
Influence of power supply voltage
Influence of power supply frequency
Influence of input frequency
Applicable
Conforming standards
standards
EMC
Safety standards
Insulation resistance
Dielectric strength
Noise immunity
Vibration resistance
Shock resistance
Degree of protection
4
Single-phase Current Relay
85% to 110% of power supply voltage
50/60 Hz ± 5 Hz
K8AB-AS1 and K8AB-AS2: DC input or AC input (45 to 65 Hz)
K8AB-AS3:
AC input (45 to 65 Hz)
K8AB-AS1 and K8AB-AS2: Continuous input: 120% of maximum input, 1 s max.: 150% of maximum input.
K8AB-AS3:
Continuous input: 120% of maximum input, 30 s max.: 200% of maximum input,
1 s max.: 600% of maximum input
Note: Overload capacity of primary side of CT.
Set value ± 10% full scale
Operating value ± 2%
Error calculation: Error = ((Maximum operating value − Minimum operating value (over 10 operations))/2)/
Average value × 100%
Reset value ± 2%
Error calculation: Error = ((Maximum reset value − Minimum reset value (over 10 resets))/2)/Average value
× 100%
Operating time repeat error: ± 50 ms
Overcurrent:
Measured when input suddenly changes from 0% to 120% of setting.
Undercurrent:
Measured when input suddenly changes from 120% to 0% of setting.
Startup lock time repeat error: ± 50 ms (measured at sudden change from 0% to 120% of setting)
Operating value
Drift based on measured value at standard temperature:
− 20 ° C to standard temperature: ± 1,000 ppm/ ° C max.
Standard temperature to 60 ° C: ± 1,000 ppm/ ° C max.
(Humidity: 25% to 80%)
Operating time
Fluctuation based on measured value at standard temperature:
− 20 ° C to standard temperature: ± 10% max.
Standard temperature to 60 ° C: ± 10% max.
(Humidity: 25% to 80%)
Operating value
Based on ambient humidity of 65%
25% to 80%: ± 5% max.
Operating time
Based on ambient room humidity
25% to 80%: ± 10% max.
Operating value: ± 5% max.
Operating time: ± 10% max.
Note: The error in the operating value and operating time under standard conditions.
Operating value: ±5% max. (at 45 to 65 Hz)
Operating time: ±10% max. (at 45 to 65 Hz)
Note: The error in the operating value and operating time under standard conditions.
Operating value (45 to 65 Hz)
K8AB-AS1 and K8AB-AS2: ± 5% max.
K8AB-AS3: ± 10% max.
Operating time (45 to 65 Hz)
± 10% max.
Note: The error in the operating value and operating time under standard conditions.
EN60255-5 and EN60255-6
Installation environment (Pollution Degree 2, Overvoltage Category III)
EN61326
UL508
20 M Ω min.
Between external terminals and case
Between power supply terminals and input terminals (excluding models with DC power supply)
Between power supply terminals and output terminals
Between input terminals and output terminals
2,000 VAC for one minute
Between external terminals and case
Between power supply terminals and input terminals (excluding models with DC power supply)
Between power supply terminals and output terminals
Between input terminals and output terminals
1,500 V power supply terminal common/normal mode
Square-wave noise of ±1 µ s/100 ns pulse width with 1-ns rise time
Frequency 10 to 55 Hz, 0.35-mm single amplitude, acceleration 50 m/s
10 sweeps of 5 min each in X, Y, and Z directions
2
100 m/s
, 3 times each in 6 directions along three axes (up/down, left/right, forward/backward)
Terminal section: Finger protection
K8AB-AS
2
Cat. No. N142-E1-02
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