K2CM

3

■ 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

µs

Voltage reverse-phase detection models:

4,500 V (between current-carrying terminals and mounting panel)

Waveform: 1.2/50

µs

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:

Destruction:

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.