NPH1 Pushbutton Box

1. General NPH1 Pushbutton Box

Electric ratings of NPH1 Pushbutton Box : AC50/60Hz, AC415V/DC250V; Degree of protection: IP65; Standard: IEC/EN60947-5-1

2. Operating conditions Pushbutton Box

2.1 Ambient temperature is -5℃~+40℃, the average temperature during 24 hours couldn’t exceed +35℃.

2.2 Altitude: ≤2000m.

2.3 Atmosphere condition: Relative humidity of the atmosphere couldn’t exceed 50% when the highest temperature is +40℃; much higher relative humidity is allowable under the condition of lower temperature, for example, when the temperature reaches +20℃, the relative humidity is up to 90%. As for dews, which contingently appear due to change of temperature, special steps should be taken.

2.4 Pollution grade: 3

2.5 Installation category: Ⅱ

2.6 Tightening torque is 0.8~1.2N·m for the cable terminals. Cross section of the cable connection is 0.5~2.5mm2, and 8mm conductor length is needed.

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