Cat. No. N146-E1-02
Three-phase Phase-sequence Phase-loss Relay
K8AB-PM
3
■
Specifications
Input frequency range
45 to 65 Hz
Overload capacity
Continuous input: 115% of maximum input, 10 s max.: 125% of maximum input
Setting error
Operating value
Set value
±
10% of full scale
Operating time
Startup lock time
Set value
±
0.5 s
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
Overvoltage: Operating value x 95%
±
2%
Undervoltage: Operating value x 105%
±
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
Overvoltage:
Measured when input suddenly changes from 70% to 120% of setting.
Undervoltage:
Measured when input suddenly changes from 120% to 70% of setting.
The input voltage, however, must be between 70% and 125% of rating.
Startup lock time
Startup lock time repeat error:
±
0.5 s
(The operating time when the operating time is set to the minimum value and the power supply suddenly
changes from 0% to 100%.)
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 input frequency
At 45 to 65 Hz
Operating value
±
5% max.
Operating time
±
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
Safety standards
UL508
Insulation resistance
20 M
Ω
min.
Between external terminals and case
Between input terminals and output 1 terminals
Between input terminals and output 2 terminals
Between output 1 terminals and output 2 terminals
Dielectric strength
2,000 VAC for one minute
Between external terminals and case
Between input terminals and output 1 terminals
Between input terminals and output 2 terminals
Between output 1 terminals and output 2 terminals
Noise immunity
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
Vibration resistance
Frequency 10 to 55 Hz, 0.35-mm single amplitude, acceleration 50 m/s
2
10 sweeps of 5 min each in X, Y, and Z directions
Shock resistance
100 m/s
2
, 3 times each in 6 directions along three axes (up/down, left/right, forward/backward)
Degree of protection
Terminal section: Finger protection
