3
K2CM
■
Characteristics
Note:
This means that no malfunction occurs with the open-phase element, but the operating value of the overload element may vary.
Variation due to
temperature
fluctuation
At 20
±
20
°
C
Overcurrent:
±
5% of operating value,
±
10% of operating time
Open-phase:
±
10% of operating value,
±
10% of operating time
Reverse-phase:
±
10% of operating value,
±
10% of operating time
At 20
±
30
°
C
Overcurrent:
±
10% of operating value,
±
20% of operating time
Open-phase:
±
20% of operating value,
±
20% of operating time
Reverse-phase:
±
20% of operating value,
±
20% of operating time
Variation due to
voltage fluctuation
At 85% to 110% of
rated voltage
Overcurrent:
±
5% of operating value,
±
10% of operating time
Open-phase:
±
5% of operating value,
±
10% of operating time
Reverse-phase:
±
5% of operating value,
±
10% of operating time
Variation due to
frequency
fluctuation
At 95% to 105% of
rated frequency
Insulation resistance
10 M
Ω
min. (between current-carrying terminals and mounting panel)
5 M
Ω
min. (between current-carrying terminals and between contact poles)
Dielectric strength
2,500 VAC (between current-carrying terminals and mounting panel and between current-carrying
terminals)
1,000 VAC (between contact poles)
Permissible impulse voltage
Current reverse-phase detection models:
6,000 V (between current-carrying terminals and mounting panel)
4,500 V (between current-carrying terminals and between control power supply terminals)
Waveform: 1.2/50
μ
s
Voltage reverse-phase detection models:
4,500 V (between current-carrying terminals and mounting panel)
Waveform: 1.2/50
μ
s
Overcurrent strength of main circuit
No abnormality develops when 20 times the set current value is applied for 2 s, 2 times with a 1-
minute interval.
Overvoltage strength of control power
supply circuit
No abnormality develops when 1.15 times the relay’s rated voltage is applied once for 3 hours.
Variation due to waveform distortion
No malfunction occurs when pulse containing 100% of the 2nd to 9th harmonics is applied (open-
phase switch set to “Low”). (See note.)
Vibration
Malfunction:
10 to 55 Hz, 0.3-mm double amplitude (in X, Y, and Z directions for 10 minutes each)
Destruction:
10 to 25 Hz, 2-mm double amplitude (in X, Y, and Z directions for 2 hours each)
Shock
Malfunction:
98 m/s
2
(approx. 10 G) in X, Y, and Z directions
Destruction:
294 m/s
2
(approx. 30 G) in X, Y, and Z directions
Test current
(reference only)
Operating time
Set time value
Setting
characteristics of
operating time
Approx.
±
30% of the maximum setting value
Service life
Electrical: 10,000 operations
Ambient temperature
Operating:
−
10 to 60
°
C (with no icing)
Storage:
−
25 to 65
°
C
Humidity
35% to 85%
Altitude
2,000 m max.
