European box changing configuration introduction

How do you equipped with European boxes? Don't worry, below, European box transitions will introduce everyone.

Box of high voltage side equipped

(1) The box will be divided into a smart terminal type and a dual-circuit power supply type according to the primary wire picking method on the high voltage side. It is the smart terminal box that does not need to be fully considered: Two out), can be seen as a dual-circuit power supply box.

(2) The European box has a high voltage side with a knife gate. Also there is a load switch - fuse constitutes maintenance. Taking into account the box-changing engineering budget, for the capacity of no more than 800kV · a, the high-voltage side maintenance is not high, and the rear side is used. 

(3) The high pressure load switch equipped with the European box is more common to the FLN-12 hexafluorinated sulfur load switch.

(4) Maintenance of high pressure fuse melt-based rated currents are selected:

Irr = kigmax

IRR - rated current of the melt, a;

K - index value, usually use 1.3:

Igmax - transformer high voltage side rated current.

(5) Fully consider the safety factor on the operation process and overhaul, and the European box changes high-voltage side equipments should meet the following requirements.

1 The load switch has ground protection in the disconnection, ensuring maintenance safety factor.

2 The load switch is guaranteed to lock each other to ensure the operating safety factor.

(6) Modern American box changes due to high pressure load switch a fuse constitutes electrical products and transformer combined two, assembled in the same oil-changing box body, including position load switches, storage fuse, plug-in fuse, and transformer. Its dual-circuit power supply is based on the internal connection end of the conversion position load switch.