• Ambient air temperature is neither higher than +40°C nor lower than -10°C;
• Altitude of installation site does not exceed 1000m;
• The maximum mean monthly relative air humidity is 90% in the wettest month. The minimum mean monthly temperature is 25°C, with consideration of condensation generated on the surface of product due to temperature change.
• The operating condition shall be free from obvious impact and vibration;
• The medium is without explosion danger, and in the medium there is no gas and dust (including conductive dust) sufficient for corroding metal and destroying insulator.
• The operating condition shall be free from rain and snow.

Composition of model No. and meanings:

For product specifications, rated voltages are 7.2kV, the rated current is below 630A. Control voltages include 220V, 380V.

• Overall and installation dimensions (See Fig.1,2)
• See Table 1 for main technical features;
• Number of pole of main loop is 3;
• Control power supply: 220V, 380V and 50Hz/60Hz, and also customized according to user needs;
• Control loop is DC electromagnet. Coils are connected with AC control power supply via power module. Schematic diagram and wiring diagram (See Fig3);
• Rated duty: discontinuous long-time duty and repeated short-time duty (rated on-load factor is 40%); The auxiliary contact is three normally open and normally closed two, heating current is 5A.

We are engaged in manufacturing, development, service, solution, maintenance & marketing of H.V./L.V. power distribution equipments, switchgears, transformers, substations..etc. for all over the world. As a leading & professional manufacturer, we mainly manufacture below items and supply their electrical accessories:

• H.V.& L.V.switchgears
• Power Distribution Board (PDB)
• M.V solid insulated switchgears (SIS)
• compact substations /Package substation/kiosk substation
• single phase & three phase pad mounted transformers(PMT)
• Gas insulated switchgears(GIS)
• Cable Brach box
• Blokset Switchboards/switchgears
• Automatic feeder Voltage Regulator
• Ring main units (RMU)
• Oil-immersed transformers and dry type transformers