Anhui Mingge Electric Co., Ltd.

1. Overview
ZN□-27.5, 2000-31.5 single-phase indoor electrified railway vacuum circuit breaker (hereinafter referred to as the circuit breaker).
This circuit breaker is a single-phase AC 50Hz indoor power distribution device, suitable for traction substations, zoning booths and switching stations of electrified railways, as control switches and fault protection switches.
2. Use environmental conditions
a. ambient temperature: -25 degrees ~+40 degrees.
b. air relative humidity: the daily average is not more than 95%, and the monthly average is not more than 90%. The average daily water vapor is not more than 2.2X10-3Mpa, and the average monthly water vapor is not more than 1.8x10-3 MPa.
c. altitude: not more than 1000m for ordinary type and 3000m for plateau type.
d. atmospheric conditions: there should be no pollution, corrosive and explosive media that seriously affect the insulation of products.
e. installation place: there should be no serious vibration and bumps.