ZW20-12F Outdoor High-Voltage Vacuum Circuit Breaker

ZW20-12F/T□-□ Outdoor High-Voltage Vacuum Circuit Breaker Product Introduction

ZW20-12F Outdoor High-Voltage Vacuum Circuit Breaker Product Introduction

1. Product Brief Introduction

The ZW20-12F series outdoor high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is outdoor power distribution equipment with a rated voltage of 12kV and three-phase AC 50Hz. It adopts vacuum arc extinguishing and SF6 gas as insulation medium, which is an upgraded product of ZW20-12F pole-mounted vacuum circuit breaker. The tank body adopts the VS5 gas chamber imported from Mitsubishi Corporation of Japan, with airtight, explosion-proof and insulation structure design. The inlet and outlet lead wires are designed for excellent sealing performance, with no leakage of SF6 gas filled inside. Its spring operating mechanism has been optimized for miniaturization, reliability and stability, and adopts direct chain drive and multi-stage latching system, with several times higher operating reliability and stability than traditional domestic spring operating mechanisms; the contact between the main circuit shaft and the bushing adopts an internal and external expansion type chain structure, with small contact resistance and low temperature rise. Therefore, the ZW20-12F outdoor pole-mounted vacuum circuit breaker is a product with simple maintenance and an excellent choice among pole-mounted circuit breakers.

The ZW20-12F is additionally equipped with overcurrent protection and mechanical spring energy storage indication, and is equipped with aviation sockets for secondary electrical connection, which is convenient to combine with intelligent controllers. Its excellent electrical and mechanical properties make the ZW20-12F outdoor pole-mounted vacuum circuit breaker widely used. It is mainly used for opening and closing 10kV power system load current and short-circuit current, suitable for protection and control in power distribution systems of power stations and industrial and mining enterprises, and more suitable for places with frequent switching operations in power grids. The product is matched with controller accessories and has a perfect combined function, which can meet the requirements of power grid automation system.

2. Model Meaning & Explanation

The coding of the product model contains the core structural characteristics and parameter information of the circuit breaker. The specific meaning of each part of the model is as follows:

3. Main Technical Parameters

Serial No.	Item	Unit	Data
01	Rated voltage	kV	12
02	Rated frequency	Hz	50
03	Rated current	A	630 / 1000
04	Rated short-circuit breaking current	kA	20 / 25
05	Rated peak withstand current	kA	50 / 63
06	Rated short-time withstand current	kA	20 / 25
07	Rated closing short-circuit current	kA	50 / 63
08	Rated operating sequence	-	Open-0.3s-Close-Open-180s-Close-Open
09	Mechanical life	times	10000
10	Rated breaking times	times	10000
11	Rated short-circuit breaking times	times	30
12	Power frequency withstand voltage for 1min (wet) phase to phase, phase to ground	kV	34
12	Power frequency withstand voltage for 1min (dry) phase to phase, phase to ground / break	kV	42/48
13	Lightning impulse withstand voltage phase to phase, phase to ground / break	kV	75/85
14	Secondary circuit power frequency withstand voltage for 1min	V	2000
15	Mass	kg	Approx. 140
16	Contact opening distance	mm	9±2
17	Contact travel	mm	3±1
18	Average opening speed	m/s	1.2±0.2
19	Average closing speed	m/s	0.6±0.2
20	Rated operating voltage	V	AC/DC220
21	Rated pressure of SF6 gas (pressure gauge)	MPa	0.05 (20℃)