K8AB-AS

4

■ Specifications

Allowable power supply voltage range

85% to 110% of power supply voltage

Allowable power supply frequency range

50/60 Hz

±5 Hz

Input frequency range

K8AB-AS1 and K8AB-AS2: DC input or AC input (45 to 65 Hz)

K8AB-AS3:

AC input (45 to 65 Hz)

Overload capacity

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.

Setting error

Operating value

Set value

±10% full scale

Reset value

Operating time

Startup lock time

Repeat error

Operating value

Operating value

±2%

Error calculation: Error = ((Maximum operating value

− Minimum operating value (over 10 operations))/2)/

Average value

× 100%

Reset value

Reset value

±2%

Error calculation: Error = ((Maximum reset value

− Minimum reset value (over 10 resets))/2)/Average value

× 100%

Operating time

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

Startup lock time repeat error:

±50 ms (measured at sudden change from 0% to 120% of setting)

Temperature influence

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%)

Humidity influence

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.

Influence of power supply voltage

Operating value:

±5% max.

Operating time:

±10% max.

Note: The error in the operating value and operating time under standard conditions.

Influence of power supply frequency

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.

Influence of input frequency

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.

Applicable

standards

Conforming standards

EN60255-5 and EN60255-6

Installation environment (Pollution Degree 2, Overvoltage Category III)

EMC

EN61326

Insulation resistance

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

Dielectric strength

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

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

10 sweeps of 5 min each in X, Y, and Z directions

Shock resistance

Degree of protection

Terminal section: Finger protection