VZG-12GD Indoor High Voltage Three Station Vacuum Circuit Breaker

The VZG-12GD indoor high-voltage three position vacuum circuit breaker is an intelligent switchgear designed specifically for 12kV distribution systems. It integrates the functions of closing, opening, and grounding, and is suitable for high-frequency operation scenarios in industrial and mining enterprises, substations, and data centers. Adopting vacuum arc extinguishing technology, the short-circuit current breaking capacity reaches 31.5kA, and the mechanical life exceeds 20000 times, which complies with GB/T 1984-2014, JB/T 3855-2008 and DL/T 403-2000 standards. Modular handcart design suitable for fixed cabinets and inflatable cabinets (C-GIS), with a protection level of IP4X, capable of withstanding environments from -25 ° C to+60 ° C, supporting quick insertion and maintenance, and optional intelligent monitoring module (contact wear, real-time temperature feedback), providing an "efficient, safe, and maintenance free" power protection solution.

Price：

￥0.00
Category：

Indoor High Voltage Vacuum Circuit Breaker
Browse number：

49
Release time：

2024-10-21 23:08:34
Quantity： - +
Share：

INQUIRY

Detailed Description

Product Overview

The VZG-12GD series indoor high-voltage three station vacuum circuit breaker has excellent electrical and mechanical performance, reliable and stable mechanism, and long service life. The main circuit adopts fixed sealing columns, which improves the environmental adaptability and insulation reliability of the circuit breaker; Reliable mechanical and electronic performance, extended mechanical and electronic lifespan, make maintenance free Circuit breakers possible. It can be used in 3.6-12kV power systems as a power grid equipment and a protection box control unit for power design in industrial and mining enterprises. It is suitable for various types of loads and frequent operations, as well as situations where short-circuit currents are disconnected multiple times. The product has complete mechanical and electrical interlocking devices, with high operational stability and reliability, ensuring the safety of operators and electrical safety.

◆ Adopting fixed sealing technology.

The product adopts a modular design: a frame structure that integrates high-performance miniaturized high-voltage electrical products such as isolation switches, sealed Vacuum Circuit Breakers, grounding switches, sensors, interlocking mechanisms, and operating mechanisms.

The compatible cabinet size is (450x1000x1800) mm.

◆ Rotary isolation switch, with visible fracture after opening.

There is a mandatory mechanical interlock between the isolation switch, circuit breaker, and grounding switch to prevent misoperation.

The circuit breaker adopts a modular operating mechanism, which can be independently replaced or maintained, and has good interchangeability. It can be operated manually or remotely controlled through AC or DC energy storage operation.

The cabinet door and grounding switch are designed with a reliable interlocking structure to ensure the safety of operators.

Technical Parameter

Item	Unit	Data
Rated voltage	kv	12
(1 minute) Rated short-time power frequency withstand voltage: phase to phase/fracture		42/48
Rated lightning impulse withstand voltage (peak): phase to phase/fracture		75/85
Secondary circuit power frequency withstand voltage (1min)	V	2000
Rated frequency	Hz	50
Rated current	A	20	25	31.5
Rated short-circuit breaking current	kA	50	63	80
Rated peak withstand current	kA	50	63	80
Rated short-circuit closing current	kA	20	25	31.5
4s rated short-time withstand current	kA	20	25	31.5
Rated short-time withstand current duration	S	4
Rated breaking current of single/back-to-back capacitor bank	A	630/400
Rated capacitor bank closing inrush current	kA	12.5 (frequency not exceeding 1000Hz)
Rated short-circuit current breaking times	times	30
Mechanical lifespan (isolating switch/circuit breaker/grounding switch)		3000/10000/3000
Allowable cumulative thickness of wear for dynamic and static contacts	mm	3
Rated closing operation voltage	V	AC24/48/110/220 DC24/48/110/220
Rated opening operation voltage
Rated voltage of energy storage motor	V	AC24/48/110/220 DC24/48/110/220
Rated power of energy storage motor	W	70
Energy storage time	S	15
Contact opening distance	mm	9±1
Overtravel		3.5±1
Contact closing bounce time	ms	≤2
Three phase asynchronous opening and closing		≤2
Opening time (rated voltage)		40
Closing time (rated voltage)		60
Average opening speed (contact just opened~6mm)	m/s	0.9~1.3
Average closing speed (6mm~just closed contact)		0.5~1.1
Contact opening rebound amplitude	mm	≤2
Contact closing contact pressure	N	2400±200(20-25kA)3100+200(31.5kA)
Rated operating sequence		O-0.3s-CO-180s-CO