VNA-BHA 10kV Indoor Load Break Switch with Earthing Option

The VNA-BHA 10kV Indoor Load Break Switch with Earthing Option provides safe and reliable load interruption for medium-voltage AC systems. Designed for indoor switchgear, it supports 10kV operations, modular integration, and earthing safety. Ideal for industrial, commercial, and utility applications, it ensures operational reliability, personnel protection, and fault isolation.

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VNA Load Break Switch

This VNA load break switch is equipped with an arc extinguishing chamber made from polymethyl methacrylate (PMMA). It is designed for interrupting current circuits under load conditions at a voltage level of 10kV. Arc quenching takes place inside the polymer chamber due to the combustion byproducts of the chamber material and the rapid disconnection speed.

The product is available with or without an integrated earthing switch. For models with earthing knives, three structural variants are available:

Type I: The earthing switch is positioned on the separable contact side.
Type II: The earthing switch is located on the hinged side of the moving contact.
Type III: The earthing switches are installed on both sides of the breaker.

VNA-BHA

Item	Specification
Rated Voltage	10 kV
Maximum Operating Voltage	12 kV
Rated Current	630 A
Type of Operating Mechanism	Left-side
Earthing Blade Position	Bottom (Type II)
Rated Breaking Current (cos φ ≥ 0.7)	630 A
Rated Thermal Withstand Current	20 kA
Rated Dynamic Withstand Current	51 kA
Duration of Short-Circuit Current	1 s
Maximum Breaking Time	≤ 0.2 s
Maximum Closing Time	≤ 0.2 s
Weight	38 kg