High-Voltage Main Incoming Cabinet

A High-Voltage Main Incoming Cabinet sits on the high voltage side of your substation.
It connects directly to the utility power lines.
Its job is to turn on, turn off, and protect the high voltage lines.
This product meets the IEC 62271-200 standard.
Rated voltages are 12kV, 24kV, or 40.5kV.
Rated current goes from 630A to 3150A.
Power frequency withstand voltage is 42kV for 1 minute.
Lightning impulse withstand voltage is 75kV.
The cabinet has a metal-clad, fully enclosed structure.
Each compartment is sealed separately to keep workers safe.
Big projects from China Railway, China Railway Construction, CCCC, and CSCEC use our High-Voltage Main Incoming Cabinet to connect to the grid.

The outer shell uses 2mm thick aluzinc steel plate.
This material resists corrosion very well.
We double-bend and rivet it for high stiffness.
The main switch is a solid-sealed pole vacuum circuit breaker, like VS1 or VD4.
Mechanical life is 30,000 operations.
Electrical life is 10,000 operations.
Breaking capacity is between 31.5kA and 40kA.
The current transformers are epoxy resin cast and fully enclosed, with an accuracy class of 0.2S for metering.
The grounding switch has a fast closing mechanism and can close on a short circuit current.
All doors and panels have mechanical and electromagnetic locks.
We strictly follow the "five-prevention" sequence.
Our factory is 2,000 square meters and has ISO9001 certification.

First, it is safe and smart to run.
The vacuum breaker has an integrated operating mechanism.
Opening time is ≤35ms, so the arc lasts very short.
We add a microcomputer protection relay, like REF615 or SEPAM.
It gives three-stage overcurrent, directional overcurrent, zero-sequence overcurrent, overload, and auto-reclosing.
Protection setting error is ≤3%.
It also supports IEC 61850 communication for digital substations.

Second, it has anti-condensation design.
We put a smart temperature and humidity controller with a heater inside.
This works well in humid areas like the south.

Third, operation is easy to see.
The front panel has a mimic bus diagram and status lights.
We provide full type test reports, plus seismic and internal arc test proof.
This High-Voltage Main Incoming Cabinet has utility-grade reliability.