High Voltage Switchgear vacuum circuit breaker in the closing work within the low voltage switch cabinet sales, dish cabinet and the back door with a mechanical lock on the door earthing. (To prevent mistakenly charged interval). Vacuum breaker closing within high voltage switchgear at work, unable to put together a ground knife. (Antistatic articulated ground) within the vacuum circuit breaker high voltage switchgear at work running low voltage switch cabinet closing arguments, not exit the car breaker operating position. (To prevent negative Hera Knife) * ambient air temperature must not exceed + 40 ℃ low voltage switch cabinet, not less than -5 ℃, and its average temperature within 24h shall not exceed + 35 ℃. * Air cleaner low voltage switch cabinet principle, the maximum temperature is + 40 ℃, its relative humidity must not exceed 50%, at lower temperatures, allows a greater relative humidity. * Pollution degree 3. * GGD low-voltage switchgear installation site altitude not exceeding 2000m. * Special conditions of use, shall be negotiated when ordering. HV & LV low voltage switch cabinet principle _ _ Tianchang instrument linked instruments provided by the United Instrument Sales Co., Ltd. Tianchang instrument. Tianchang instrument Alliance Instrument Sales Co. (www.ylybxs.com) (www.ylybxs.com) strong, credible, in Chuzhou temperature instrumentation industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Tianchang instrument linked instruments and you hand into the brilliant, for a better future!