33kV electrical circuit breakers VCB Vacuum Circuit Breaker

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Key attributes

Brand	ROCKWILL
Model NO.	33kV electrical circuit breakers VCB Vacuum Circuit Breaker
Rated voltage	33kV
Rated frequency	50Hz
Series	VS1

Product descriptions from the supplier

Description

Products Description

Vacuum Circuit Breaker (VCB) is an electrical switching device that uses a vacuum as the interrupting medium to extinguish the electric arc when a fault occurs in the electrical circuit. VCBs are typically used in medium-voltage applications (up to several thousand volts) and are often used in power generation, transmission, and distribution systems.

Main Technical Parameter
Item	Description		Unit	Data
1	Rated Voltage		kV	12
2	Rated Frequency		HZ	50
3	Rated Lighting impulse withstand Voltage (Peak)		kV	75
4	Rated Power frequency withstand voltage (1min)		kV	42
5	Rated Voltage		A	630	1250	1600	2000	2500
				1250	2000	2500	3150	4000
6	Rated Short Circuit Breaking Current		kA	20/25	31.5		40
7	Rated Short Circuit Making Current (Peak)		kA	50/63	82		100
8	4 Second Rated Withstand Current		KA/S	20/4 25/4 31.5/4
9	Rated insulation level	Power frequency withstand voltage (1min)	KV	42/48
		Lighting impulse withstand voltage (peak)		75/85
10	Rated Operating Sequence			O-0-3s-CO-180s-CO
11	Mechanical Life		times	20000
12	Rated short circuit current breaking time		times	30
13	Rated close brake voltage of operating machine		V	AC220/110 DC220/110
14	Contact stroke		mm	11±1
15	Exceed range(the compress length of contact spring)		mm	3.5±0.5
16	Average closing speed		m/s	0.5-0.8
17	Average Opening speed		m/s	0.9-1.2
18	The jump time of contact close break		ms	≤2
19	Different period of three-phase break and close break		ms	≤2
20	Resistance of each phase main loop		μΩ	≤50(630A) ≤45(1250A) ≤35 (1600-2000A) ≤25 Above 2500A)

Overview

Place of Origin:Zhejiang, China

Brand Name:CHSH
Model Number:VS1-12
Breaking Capacity:31.5KA
Rated Voltage:12kV
Rated Current:630A-4000A
Certificate:ISO 9001 CCC CE
Type:Vacuum
Poles Number:3
Standard:IEC62271
Mechanical Life:20000 times
Frequency:50H/60Hz
Packing:Wooden case/ netural packing
Payment:T/T/ Western Union
OEM:offered
Usage:Power distribution breaker
BCD Curve:D/other

The main advantage of VCBs over other types of circuit breakers is that they are very reliable and require very little maintenance. They are also more environmentally friendly than other types of circuit breakers because they do not use any harmful gases or liquids.

When a fault occurs in an electrical circuit, the VCB interrupts the current flow by creating a high resistance path through the vacuum. This causes the current to be rapidly reduced to zero, which extinguishes the arc and breaks the circuit. VCBs are capable of interrupting both AC and DC currents and are designed to handle both short-circuit and overload conditions.

Overall, VCBs are a very reliable and effective way to protect electrical systems from damage due to faults. However, they are typically more expensive than other types of circuit breakers and may not be suitable for all applications.

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Model

VS1-12

Warranty by

Whole life care manager

Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.

The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.

33kV electrical circuit breakers VCB Vacuum Circuit Breaker

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