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0102030405

China VS1 (VTDIndoor High Voltage AC Vacuum Circuit Breaker - 12kV to 24kV Suppliers & Factory

The VS1 (VTDseries Indoor High Voltage AC Vacuum Circuit Breaker, produced in China, is designed for switchgears operating at rated voltages of 12-24kV. This circuit breaker is essential for protecting and controlling electrical equipment in various industries, including mining enterprises, power plants, and substations. One of its key advantages is its capability to handle frequent operations at rated current and multiple short-circuit currents, making it an ideal choice for demanding applications.

Manufactured by leading suppliers, the circuit breaker features an integrated design that combines the operating mechanism and the circuit breaker itself. This innovative structure consists of a front and rear sub-assembly, ensuring reliable interlocking functionality. The unit can be utilized as either a fixed installation or a handcart unit with a chassis, providing versatility for various installation needs. As a trusted factory in the industry, we ensure high-quality standards in our products.

Product Details

General

VS1 (VTD6) series Indoor high voltage AC vacuum circuit breaker is applicable to switchgears with rated voltage of 12~24kV. It's used for protecting and controlling the electrical equipment in the fields of industry & mining enterprise, power plants and substation. Due to the special advantages of vacuum circuit breakers, it is especially suitable for applications requiring frequent operations at rated current or multiple short-circuit currents.

The circuit breaker adopts the integrated design of operating mechanism and circuit breaker. They form a front and rear sub assembly structure with reliable interlocking function. It can be used as a fixed installation unit or a handcart unit with a chassis.

Standards

Product quality assurance is based on the continuous improvement of product research, development, design and production processes that meet the requirements of all aspects of the quality system. The basic parameters and technical indicators of the product meet the following standards.

GB/T1984	High voltage AC circuit breaker
DL/T403	High voltage AC circuit breaker
IEC60694	Common specifications for high-voltage switchgear and controlgear standards
IEC62271-100	High-voltage switchgear and controlgear-Part 100: Alternating current circuit breakers

Service Conditions

Ambient temperature: - 15 ℃ ~ + 40 ℃
Altitude: ≤ 1000M
Relative humidity: Daily average relative humidity ≤ 95%
Daily average vapor pressure ≤ 2.2x10-3MPa
Monthly average relative humidity ≤ 90%
Monthly average vapor pressure ≤ 1.8x10-3MPa
Earthquake resistant level: ＜ grade 8 3.
Site condition: no dripping, no flammable and explosive hazards, no chemical corrosive gas and no violent vibration

※Note: If the service environment exceeds the above conditions, please consult with the manufacturer.

Type and Designation

Technical Data

◆ Technical parameters of circuit breaker

Item	Unit	Parameters
Rated voltage	kV	12	24
Rated frequency	Hz	50/60
1min Rated power frequency short-time withstand voltage (phase to phase, to earth / isolation distance)	kV	42	65
Rated Lightning impulse withstand voltage (peak) (phase to phase, to earth / isolation distance)	kV	75	125
Rated operation sequence		O-t-CO-t'-CO

Item	Unit	Parameters
Rated current	A	630	1250	1250	1600	2000	2500	1250	1600	2000	2500	3150	3150	4000
Rated short-time breaking current	kA	20/25		31.5				40					50
Rated short-circuit making current (peak)	kA	50/63		80				100					125
Rated short-circuit duration	S	4		4				4					4
Mechanical life	Times	20000		20000				20000					10000

Note:
20kA 25kA 31.5kA t=0.3s t’=180s
40kA 50kA t=180s t’=180s
4000A requires forced air cooling
※ If the mechanical life requirement is higher than the standard configuration, consult with the manufacturer.

◆ Mechanical characteristic parameters of circuit breaker

Item	Unit	Parameters
Item	Unit	12KV			24KV
Distance of contact	mm	9 ± 1			13 ± 1
Over-travel	mm	3.5±0.5
Three-phase C/O asynchrony	ms	≤2
Closing contact bounce time	ms	≤2/≤3(50kA)
Contact pressure of closing contact	N	20kA	25kA	31.5kA		40kA	50kA
Contact pressure of closing contact	N	2000 ± 200	2400 ± 200	3100 ± 200		4250 ± 200	5500 ± 200
Average opening speed	m/s	0.9~1.31			1.1~1.6
Average closing speed	m/s	0.4~0.8			0.6~1.0

◆ Opening and closing time

Closing time: 30~70ms

Opening time: 15~45ms

◆ Technical parameters of coil and locking electromagnet

Name of equipment	Power (W)	Rated voltage (V)
Opening coil	368	220/110
Closing coil	368
Locking electromagnet	4.8
Overcurrent controller Y7 (Y8, Y9)	—	—

◆ Technical parameters of energy charging motor

Rated voltage (V)	Power (W)	Charging time (s)	Applicable current class
220/110	70	≤15	20kA、25kA、31.5kA、40kA
220/110	90	≤15	50kA

Outline dimension drawing

A) Fixed type - 12kV

Rated current(A)	630 / 1250 / 1600
Rated breaking current (A)	20, 25, 31.5 / 25, 31.5 / 31.5, 40
Distance between phases	150 ± 1.5 mm
Top interlock L1	30, 50 mm
Spindle interlock L2	30, 50 mm

Outline dimension drawing of VS1 (VTD6)-12 fixed type circuit breaker (Distance between phases is 150mm)

Rated current (A)	630 / 1250 / 1600
Rated breaking current (A)	20, 25, 31.5 / 25, 31.5 / 31.5, 40
Distance between phases	210 ± 1.5 mm
Top interlock L1	30, 50 mm
Spindle interlock L2	30, 50 mm

Outline dimension drawing of VS1 (VTD6)-12 fixed type circuit breaker (Distance between phases is 210mm)
*Dimension in brackets refers to distance from outgoing terminal of composite insulated pole to center of pole.

Rated current (A)	630 / 1250 / 1600
Rated breaking current (A)	20, 25, 31.5 / 25, 31.5 / 31.5, 40
Distance between phases	210 ± 1.5 mm
Top interlock L1	30, 50 mm
Spindle interlock L2	30, 50 mm

Outline dimension drawing of VS1 (VTD6)-12 fixed type circuit breaker (Distance between phases is 275mm)

B) Withdrawable type - 12kV (trolley travel distance is 200mm)

Rated current (A)	630 / 1250
Rated breaking current (A)	20, 25, 31.5 / 25, 31.5
Static contact dimension	Φ35 / Φ49 mm
Distance between phases	150 ± 1.5 mm

Outline dimension drawing of VS1 (VTD6)-12 withdrawable type circuit breaker (For cabinet width 550mm)

Rated current (A)	630 / 1250 / 1600
Rated breaking current (A)	20, 25, 31.5 / 25, 31.5, 40 / 31.5, 40
Static contact dimension	Φ35 / Φ49 / Φ55 mm
Distance between phases	150 ± 1.5 mm

Outline dimension drawing of VS1 (VTD6)-12 withdrawable type circuit breaker (For cabinet width 650mm)

Rated current (A)	630 / 1250 / 1600
Rated breaking current (A)	20, 25, 31.5 / 25, 31.5, 40 / 31.5, 40
Static contact dimension	Φ35 / Φ49 / Φ55 mm
Distance between phases	210 ± 1.5 mm

Outline dimension drawing of VS1 (VTD6)-12 withdrawable type circuit breaker (For cabinet width 880mm)

Rated current (A)	1600 / 2000 / 2500 / 3150 / 4000
Rated breaking current (A)	31.5, 40 / 31.5, 40 / 31.5, 40 / 31.5, 40 / 40, 50
Static contact dimension	Φ79 / Φ79 / Φ109 / Φ109 / Φ109 mm
Distance between phases	275 ± 1.5 mm

Outline dimension drawing of VS1 (VTD6)-12 withdrawable type circuit breaker (For cabinet width 1000mm)

C) Fixed type - 24kV

Rated current (A)	630 / 1250 / 1600
Rated breaking current (A)	20, 25, 31.5 / 25, 31.5, 40
Distance between phases	275 ± 1.5 mm
Top / Spindle interlock	30, 50 mm

Outline dimension drawing of VS1 (VTD6)-24 fixed type circuit breaker (Distance between phases is 275mm)
* Note: Outgoing conductive surface of 1600A fixed & sealed pole and transition block provided by customer. Dimension in brackets is from outgoing terminal of composite insulated pole to center of pole.

Rated current (A)	1600 / 2000 / 2500 / 3150
Rated breaking current (A)	31.5, 40
Distance between phases	275 ± 1.5 mm
Top / Spindle interlock	30, 50 mm

Outline dimension drawing of VS1 (VTD6)-24 fixed type circuit breaker (Distance between phases is 275mm)

D) Withdrawable type - 24kV (trolley travel distance is 300mm)

Rated current (A)	630 / 1250 / 1600
Rated breaking current (A)	20, 25, 31.5 / 25, 31.5, 40 / 31.5, 40
Static contact dimension	Φ35 / Φ49 / Φ55 mm
Distance between phases	275 ± 1.5 mm

Outline dimension drawing of VS1 (VTD6)-24 withdrawable type circuit breaker (For cabinet width 1000mm)

Rated current (A)	1600 / 1600 / 2000 / 2500 / 3150
Rated breaking current (A)	31.5, 40 / 31.5, 40 / 31.5, 40 / 31.5, 40 / 31.5, 40
Static contact dimension	Φ55 / Φ79 / Φ79 / Φ109 / Φ109 mm
Distance between phases	275 ± 1.5 mm

Outline dimension drawing of VS1 (VTD6)-24 withdrawable type circuit breaker (For cabinet width 1000mm)

Frequently Asked Questions (FAQ)

Q1: What is the rated voltage range for the VS1 (VTD6) series vacuum circuit breaker?

A1: The VS1 (VTD6) series is designed for indoor high voltage AC switchgears with a rated voltage range of 12kV to 24kV.

Q2: Which international and local standards do these circuit breakers comply with?

A2: The product meets the requirements of GB/T1984, DL/T403, IEC60694, and IEC62271-100 standards.

Q3: What are the environmental limits for operating the VS1 (VTD6) vacuum circuit breaker?

A3: The standard service conditions require an ambient temperature between -15℃ and +40℃, an altitude of ≤ 1000m, daily average relative humidity ≤ 95%, and an earthquake resistant level below grade 8.

Q4: Does the 4000A current class require special cooling methods?

A4: Yes, the 4000A rated current configuration requires forced air cooling to maintain optimal operating temperatures.

Q5: What is the typical mechanical life of the circuit breaker?

A5: The mechanical life is rated up to 20,000 operations for standard models, and 10,000 operations for the 50kA rated short-time breaking current model. Higher specifications can be consulted with the manufacturer.

Q6: Can this circuit breaker be installed in environments exceeding standard service conditions?

A6: If your operational environment exceeds standard limits (e.g., altitude higher than 1000m or extreme temperatures), please consult directly with the manufacturer for custom technical configurations.