The ZN73A (VKP) -12 indoor AC high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is a three-phase AC 50Hz indoor high-voltage switchgear with a rated voltage of 7.2-12KV. The circuit breaker complies with Chinese standards GB/T1984 "High Voltage AC Circuit Breakers", JB3855 "3.6-40.5KV Indoor AC High Voltage Vacuum Circuit Breakers" and relevant IEC standards, and has reliable interlocking function.
Circuit breakers can operate frequently and have the ability to open and close multiple times and quickly reclose.
The circuit breaker is designed as a front and rear split structure, which can be used as a fixed installation unit or as a separate handcart with the chassis.

Main technical parameters of VKP-12 indoor high-voltage vacuum circuit breaker
Mechanical characteristic parameters of circuit breaker

Mechanical characteristic parameters of circuit breaker

Note: The average closing and opening speed refers to the average speed at which the contact is fully open

Figure 1 Dimensions of Handcart ZN73-12: Rated current>1600A, dimensions in parentheses indicate rated current ≤ 1600A



Figure 1 Fixed ZN73-12 external dimension diagram: rated current>1600A, dimensions in parentheses indicate rated current ≤ 1600A

VKP-12 Indoor High Voltage Vacuum Circuit Breaker