ZW32-12 Outdoor High-voltage Vacuum Circuit Breaker

ZW32-12 Series Outdoor High-Voltage Vacuum Circuit Breaker Product Introduction

1. Product Brief Introduction

The ZW32-12 series outdoor high-voltage vacuum circuit breaker (hereinafter referred to as "circuit breaker") is an outdoor power distribution switchgear with a rated voltage of 12kV and three-phase AC 50Hz. The circuit breaker is mainly used for switching on and off, closing the load current, overload current and short-circuit current in the power line, with overload and short-circuit protection functions, meeting the requirements of control and measurement. It can also realize remote control and monitoring functions, and is widely used in substations, industrial and mining enterprise power distribution systems for control and operation, especially suitable for places requiring frequent operation.

The circuit breaker complies with technical standards such as GB1984-2003, DL/T 402-2007 and IEC60056.

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:

ZW32-12 Model Meaning

Z: Vacuum Circuit Breaker
W: Outdoor
32: Design Serial Number
12: Rated Voltage (kV)
(G): Isolating Switch
T: Spring Operating Mechanism
□ (first): Rated Current (A)
□ (second): Rated Short-Circuit Breaking Current (kA)

4. Main Technical Parameters

Serial No.	Name	Unit	Value
1	Rated Voltage	kV	12
2	Rated Current	A	630, 1250
3	Rated Frequency	Hz	50
4	Rated Insulation Level (1min Power Frequency Withstand Voltage)	kV	Dry test: 42/48 (break)
			Wet test: 34
			Lightning Impulse Withstand Voltage (Peak) to Ground: 2
5	Lightning Impulse Withstand Voltage (Peak)	kV	75/85 (break)
6	Rated Short-Circuit Breaking Current	kA	20, 25
7	Rated Short-Circuit Making Current (Peak)	kA	50, 63
8	Rated Short-Time Withstand Current	kA	20, 25
9	Rated Peak Withstand Current	kA	50, 63
10	Number of Rated Short-Circuit Breaking Current Operations	times	30
11	Rated Short-Circuit Duration	s	4
12	Rated Operating Voltage and Auxiliary Circuit Rated Voltage	V	DC/AC110, AC/DC220
13	Rated Operating Sequence	-	Close-0.3s-Open-180s-Close
14	Overcurrent Release Rated Current	A	5
15	Mechanical Life	times	10000
16	Allowable Cumulative Wear Thickness of Moving and Static Contacts	mm	3
17	Overcurrent Release Rated Current	A	5
18	Current Transformer Ratio	-	200/5, 400/5, 600/5
19	Contact Opening Distance	mm	9±1
20	Contact Overtravel	mm	2.5±0.5
21	Average Opening Speed	m/s	1.0±0.2
22	Average Closing Speed	m/s	0.6±0.2
23	Opening Time	ms	≤ 50
24	Closing Time	ms	≤ 100
25	Closing Bounce Time	ms	≤ 2
26	Three-Phase Closing/Opening Asynchronism	ms	≤ 2
27	DC Resistance Between Phases	μΩ	≤ 80 (≤ 150 with isolation)