VSG-12/1250A Efficient Medium Voltage 12kV Handcart Type Vacuum Circuit Breaker 

• Specification
• Technical parameter

• VSG-12/1250A  12kV Handcart Type Vacuum Circuit Breaker Product Overview

  Our VSG Vacuum Circuit Breaker (VCB) is designed for medium voltage power distribution and protection applications. Built with advanced vacuum technology, the VSG series ensures reliable and safe operation in various industrial and commercial environments. This breaker is ideal for applications requiring frequent switching and offers exceptional performance and durability.

  Key Features

  • Voltage Rating: 12kV
  • Current Rating: 1250A
  • High Interrupting Capacity: Capable of handling high fault currents, ensuring protection and safety.
  • Compact and Robust Design: Space-saving design without compromising on durability.
  • Long Mechanical and Electrical Life: Engineered for longevity, reducing maintenance and replacement costs.
  • Fast Operating Speed: Quick response to faults, minimizing potential damage to the system.
  • Environmental Safety: Free from SF6 gas, making it an eco-friendly option.

  Applications

  • Industrial Facilities: Provides reliable protection and switching for manufacturing plants and processing facilities.
  • Commercial Buildings: Ideal for use in office complexes, shopping centers, and other commercial properties.
  • Power Distribution: Suitable for use in substations and utility networks for medium voltage power distribution.

  Advantages

  • Safety and Reliability: Vacuum technology ensures arc extinguishing is quick and reliable, enhancing safety.
  • Low Maintenance: Minimal moving parts reduce the need for regular maintenance.
  • Energy Efficiency: Designed to consume less energy during operation.
  • Versatility: Compatible with various switchgear configurations and standards.

• VSG-12 Handcart Type Vacuum Circuit Breaker Technical parameter

  No.	Item		Unit	Data
  1	Rated voltage		kV	12
  2	Rated frequency		Hz	50
  3	Rated insulation level	1min power frequency withstand voltage	kV	42
  		Rated lightning impulse withstand voltage	kV	75
  4	Rated current		A	630/1000/1250/1600/2000/2500/3150/4000
  5	Rated short circuit breaking current Rated short-time withstand current (virtual value)		kA	20/25/31.5/40/50
  6	Rated short circuit making current (peak value) Rated dynamic current(peak value)		kA	50/63/80/100/125
  7	Rated short-circuit breaking current breaking time		times	30, 50
  8	Rated thermal stability time		s	4
  9	Rated operation sequence			O-0. 3s-CO-180s-CO
  10	Mechanical life		times	30000
  11	Rated breaking current of single capacitor bank		A	630
  12	The breaking current of single rated capacitance bank		A	400
  13	The breaking current of rated back to back capacitance bank		s	4

  Overall dimensions

  

   

  Contact Us

  For more information about the VSG Vacuum Circuit Breaker or to request a quote, please contact us. Our experts are ready to assist you with your medium voltage switchgear needs.

VBI-24 Side Mounted Vacuum Circuit Breaker With 3 Current Transformers

• Specification
• Technical parameters

• VBI-24 Side Mounted Vacuum Circuit Breaker With 3 Current Transformers

  VBI-24 indoor medium-voltage sealed vacuum circuit breaker is suitable for air-insulated indoor switches and is used for control and protection in power grids with AC and rated voltage of 24KV and below. Vacuum circuit breakers are used in frequent It has extremely excellent performance in operation and situations where the circuit breaker current needs to be opened, fully meets the requirements of automatic closing, and has high reliable operation and service life.

  The operation mechanism of VBI-24 side mounted type vacuum circuit beaker is used spring to storage energy, which can be operated by two ways, manual or electrical. The characteristics are accordance with GB1984-89 <AC High Voltage Circuit Breaker>, JB3855-96<10kv Indoor High Voltage Vacuum Circuit Breaker General Technical Specifications>, Relevant Provisions of IEC56 standard.

  Advantages of installing current transformers on side-mounted circuit breakers
  1. Integrated design: Installing the current transformer directly on the circuit breaker makes installation and wiring easier, reducing additional installation space and costs.
  2. Instant response: Directly monitoring the current near the circuit breaker can respond to fault conditions more quickly, improving the protection speed and accuracy of the system.
  3. Reduced interference: Reduced interference and attenuation in the signal transmission path, improving the accuracy of the measurement.

• Main Technical Specification

  No.	Name		Unit	Data
  *	Type		/	口Insulating cylinder 口Epoxy resin embedded poles 口Nylon embedded poles		口Upper outlet 口Side outlet
  1	Rated voltage		kv	24
  2	Rated insulation level	Power frequency withstand voltage		65
  		Rated lightning impulse withstand voltage		125
  3	Contact opening distance		mm	12±1
  4	overtravel			3±0.5
  5	Distance between phases			210±1
  6	Contact closing bounce time		ms	≤2
  7	Three-phase points,closing at different times			≤2
  8	Opening time			≤50
  9	Closing time			≤100
  10	Average opening speed(contact is separation after 6mm)		M/s	0.9~1.3
  11	Average opening speed(contact is closed before 6mm)			0.4~0.8
  12	Closing contact contact pressure		N	25KA	31.5KA
  				2200±200	3200±200

   

  External Dimensions

  

VSG-12 2000A Current Handcart Type Vacuum Circuit Breaker With Fixed Pole

• Specification
• Technical Parameters

• VSG-12 2000A Current Handcart Type Vacuum Circuit Breaker With Fixed Pole

  VSG type indoor high-voltage vacuum circuit breaker is suitable for switching various loads of different natures and frequent operations in power systems with three-phase AC 50Hz and rated voltage of 7.2kV-40.5kV. It can be used in industries, mining, enterprises, and power plants. And for the protection and control of electrical equipment in substations. It can be equipped with KYN28A and other mid-mounted handcart switch cabinets, and can also be equipped with XGN fixed switch cabinets. The VSG indoor high-voltage vacuum circuit breaker complies with the national standards GB1984 “AC High-voltage Circuit Breaker”, JB/T3855 “3.6~40.5kV Indoor AC High-voltage Vacuum Circuit Breaker” and IEC60056 “High-Voltage AC Circuit Breaker” standards.

  VCB Features:

  • • VSG Spring Operating Mechanism: Ensures fast and reliable switching operations with minimal maintenance.
    • Handcart Design: Provides flexibility and ease of installation, maintenance, and replacement.
    • Embedded Pole Technology: Enhances dielectric strength and reliability, reducing maintenance needs and increasing lifespan.
    • Compact and Robust: Designed for space-saving installations without compromising performance and safety.

  Applying Ambient Conditions:

  1.Ambient temperature -25℃– +40℃
  2.The height above sea level: ≤1000 m
  3.Relative humidity: the average humidity of a day should be no more than 95％; the average humidity of a month should be no more than 90％.
  4.Saturated vapor pressure: the average pressure of a day should be no mare than 2.2kPa; the average pressure of a month should be no more than1.8KPa.
  5.Earthquake intensity: not exceed 8 degrees
  6.It should be Installed in the places without fire, explosion, serious filth, and chemical erosion and violent vibration.

• VSG-12 2000A Current Handcart Type Vacuum Circuit Breaker With Fixed Pole

  No.	Item		Unit	Data
  1	Rated voltage		kV	12
  2	Rated frequency		Hz	50
  3	Rated insulation level	1min power frequency withstand voltage	kV	42
  		Rated lightning impulse withstand voltage	kV	75
  4	Rated current		A	630/1000/1250/1600/2000/2500/3150/4000
  5	Rated short circuit breaking current Rated short-time withstand current (virtual value)		kA	20/25/31.5/40/50
  6	Rated short circuit making current (peak value) Rated dynamic current(peak value)		kA	50/63/80/100/125
  7	Rated short-circuit breaking current breaking time		times	30, 50
  8	Rated thermal stability time		s	4
  9	Rated operation sequence			O-0. 3s-CO-180s-CO
  10	Mechanical life		times	30000
  11	Rated breaking current of single capacitor bank		A	630
  12	The breaking current of single rated capacitance bank		A	400
  13	The breaking current of rated back to back capacitance bank		s	4

  Overall dimensions

  

VSG-12 1600A Big Current Medium Voltage Fixed Type Solid Pole Vacuum Breaker 12kV

• Specification
• Technical Parameters

• VSG-12 1600A Big Current Medium Voltage Fixed Type Solid Pole Vacuum Breaker 12kV

  VSG-12 indoor high-voltage vacuum circuit breaker is an indoor and outdoor switching device used in 12KV power systems. It is used as a protection and control unit for power grid equipment and power design of industrial and mining enterprises. It is suitable for switching loads of different natures and frequent operations. The occasion of breaking short-circuit current for the first time. The product adopts VSG module integrated spring operating mechanism. The primary part of VSG-12 can use a sealed pole to seal the vacuum arc extinguisher and the main conductive circuit parts into a whole, protecting the arc extinguisher from collision, dust and condensation. It has strong environmental adaptability and greatly reduces the cost of the arc extinguisher. operation and maintenance costs

  Features:
  1. Integration, modularization, miniaturization and lightweight;
  2. High reliability, long life, more stable performance;
  3. High degree of generalization, inventory and standardization of parts;
  4. High transmission efficiency and more reasonable design;

  Applying Ambient Conditions:

  1.Ambient temperature -25℃– +40℃
  2.The height above sea level: ≤1000 m
  3.Relative humidity: the average humidity of a day should be no more than 95％; the average humidity of a month should be no more than 90％.
  4.Saturated vapor pressure: the average pressure of a day should be no mare than 2.2kPa; the average pressure of a month should be no more than1.8KPa.
  5.Earthquake intensity: not exceed 8 degrees
  6.It should be Installed in the places without fire, explosion, serious filth, and chemical erosion and violent vibration.

• VSG-12 1600A Big Current Medium Voltage Fixed Type Solid Pole Vacuum Breaker 12kV

  Technical Parameters

  No.	Item		Unit	Data
  1	Rated voltage		kV	12
  2	Rated frequency		Hz	50
  3	Rated insulation level	1min power frequency withstand voltage	kV	42
  		Rated lightning impulse withstand voltage	kV	75
  4	Rated current		A	630/1000/1250/1600/2000/2500/3150/4000
  5	Rated short circuit breaking current Rated short-time withstand current (virtual value)		kA	20/25/31.5/40/50
  6	Rated short circuit making current (peak value) Rated dynamic current(peak value)		kA	50/63/80/100/125
  7	Rated short-circuit breaking current breaking time		times	30, 50
  8	Rated thermal stability time		s	4
  9	Rated operation sequence			O-0. 3s-CO-180s-CO
  10	Mechanical life		times	30000
  11	Rated breaking current of single capacitor bank		A	630
  12	The breaking current of single rated capacitance bank		A	400
  13	The breaking current of rated back to back capacitance bank		s	4

  Overall dimensions

   

  

  VCB selection table

  S/N	Item		Unit	Data
  *	Type		/	□Handcart Type with Embedded Pole □Handcart Type with Insulated Cylinder □Fixed type with Embedded Pole □Fixed type with Insulated Cylinder
  1	Rated voltage		kV	12
  2	Rated frequency		Hz	50/60
  3	Rated  insulating level	1min  power frequency withstand voltage	kv	42
  		Rated lightning impulse withstand voltage	kv	75
  4	Rated current		A	630	1250	1600	2000	2500	3150	4000
  5	Rated short circuit breaking current Rated thermal stability current(effective value)		kA	20
  				25	25
  				31.5	31.5	31.5	31.5	31.5
  						40	40	40	40	40
  										50
  6	Rated short circuit making current（peak value） Rated dynamic current(peak value)		kv	50
  				63	63
  				80	80	80	80	80
  						100	100	100	100	100
  										125
  7	Rated short circuit current breaking times		times	30,50
  8	Rated thermal stability time		s	4
  9	Rated operating sequence		times	0-0.3s-C0-180s-C
  10	Mechanism life		times	30000
  11	The breaking current of single rated capacitance bank		A	400
  12	The breaking current of rated back to back capacitance bank		S	4

   

Liyond Indoor 33kV 35kV 36kV 40.5kV VSG Mechanism Side Type M.V. Vacuum Circuit Breaker

• Specification
• Parameters

• Liyond Indoor 33kV 35kV 36kV 40.5kV VSG Mechanism Side Type M.V. Vacuum Circuit Breaker

  VSG/C-40.5 Series Side Mounted Vacuum Circuit Breaker is a new type of three phase 50Hz according to the unique design concept and combined with the market demand and development, the rated voltage of indoor switchgear 40.5kV, it can be provided to industrial and mining enterprises, power plant and substation as the control and protection of electrical equipment, and is suitable for frequent operation.

   

  Applying ambient conditions
  1. Ambient temperature: -10 °C ~ +40 °C (It allows storage and transportation at -30 degrees centigrade);
  2. Ambient humidity: the average humidity of a day should be no more than 95%. The average humidity of a month should be no more than 90%
  3. Saturated vapor pressure: the average pressure of a day should be no more than 2.2kPa; the average pressure of a month should be no more than 1 .8kPa;
  4. Altitude: < 1500m;
  5. Earthquake intensity:≤8 degree;
  6. It should be installed in the place without fire, explosion, serious filth, and chemical erosion and violent vibration.

• Technical parameters

  No.	Item		Unit	Data
  1	Rated voltage		kV	40.5
  2	Rated insulation level	1 min power frequency withstand voltage (RMS)	kV	95
  		Lightning impulse withstand voltage (peak)	kV	185
  3	Rated frequency		Hz	50
  4	Rated current		A	1250/1600/2000
  5	4S rated short-time withstand current		kA	25	31.5
  6	Rated peak withstand current		kA	63	80
  7	Rated short circuit breaking current		kA	25	31.5
  8	Rated short circuit closing current		kA	63	80
  9	Rated operating sequence			O-0.3s-CO- 180s-CO
  10	Rated short circuit breaking current breaking times		times	20
  11	Breaking current of rated capacitor bank		A	630
  12	Mechanical Life		times	20000

  After adjusting the circuit breaker, the mechanical characteristic parameters are shown below

  No.	Item		Unit	Data
  1	Contact opening distance		mm	18±1
  2	Contact stroke		mm	5±1
  3	Average closing speed		m/s	0.8±0.2
  4	Average breaking speed		m/s	1.8±0.2
  5	Breaking time(rated voltage)		ms	20-50
  6	Closing time(rated voltage)		ms	≤100
  7	Contact closing trip time		ms/M	≤3
  8	Three phase switching off synchronism		ms/M	≤2
  9	The movable and static contact allow the accumulated thickness of friction		mm	3
  10	Dominant loop resistance		μΩ	≤60

  Shape and Installation Dimensions

  

Medium Voltage Indoor Fixed Type 3 Poles Air Insulated VD4 VCB Vacuum Circuit Breaker Wholesale

• Specification
• Technical parameters
• Drawing

• Medium Voltage Indoor Fixed Type 3 Poles Air Insulated VD4 VCB Vacuum Circuit Breaker Wholesale

  VS1-12 series of indoor vacuum breaker with common insulated cylinder is three-phrase A.C. 50 Hz indoor power distribution equipment with the rated voltage of 12KV. It’ s used for protecting controlling the electrical equipment in the fields of industry and mining enterprise, power plants and substation. This type vacuum circuit breaker conforms to national standards and the stipulation of IEC standard, the capability reaches grade of M2-E2-C2.

  The product adopts composite insulation way,spring charged operation and rod push mechanism, with the characteristics of small volume, compact design and reliable operation. It can easily match with the switchgear and meet the “Five Preventions” demands.
  This kind of vacuum circuit breaker can be used for many kinds of switchgear like KYN28(GZS1). This series of products include:VCB truck isolation truck and Fuse truck, etc.

  Applying Ambient Conditions:
  1. Ambient temperature: -10℃–+40℃
  2. Ambient humidity: the average humidity of a day should be no more than 95%; the average humidity of a month should be no more than 90%;
  3. Earthquake intensity: not exceed 8 degrees
  4. Saturated vapor pressure: average pressure of a day should be no more than2.2kPa, the average pressure of a month should be no more than 1.8kPa;
  5. The height above sea level: less than 1000m;(not including special requirements)
  6. It should be installed in the places without fire, explosion, serious filth, chemical corrosion and violent vibration.

• Medium Voltage Indoor Fixed Type 3 Poles Air Insulated VD4 VCB Vacuum Circuit Breaker Wholesale

  No.	Item		Unit	Data
  1	Rated voltage		kV	12
  2	Rated frequency		Hz	50
  3	Rated insulation level	1 min power frequency withstand voltage	kV	42
  		Rated lightning impulse withstand voltage	kV	75
  4	Rated current		A	630/1000/1250/1600/2000/2500/3150/4000
  5	Rated short circuit breaking current Rated short-time withstand current (virtual value)		kA	20/25/31.5/40/50
  6	Rated short circuit making current  Dynamic stability rated current		kA	50/63/80/100/125
  7	Rated short-circuit breaking current breaking time		Times	(above 40kA)
  8	Rated short-circuit duration		S	4
  9	Rated operation sequence			O-0. 3s-CO-180s-CO, O-180s-CO-180s-CO(above 40kA)
  10	Mechanical life		Times	30000
  11	Rated breaking current of single capacitor bank		A	630
  12	Rated breaking current of back to back capacitor bank		A	400
  13	Maximum D.C componen			50%

• Medium Voltage Indoor Fixed Type 3 Poles Air Insulated VD4 VCB Vacuum Circuit Breaker Wholesale

  

Liyond 36kV 40.5kV VCB Auto Recloser Medium Voltage VSG Type Vacuum Circuit Breakers Sales

• Specification
• Drawing

• Liyond 36kV 40.5kV VCB Auto Recloser Medium Voltage VSG Type Vacuum Circuit Breakers Sales

  Vacuum circuit breaker is the most commonly used type of high-voltage circuit breaker, mainly divided into two kinds of indoor and outdoor. We mainly focus on indoor vacuum circuit breakers. 

  The vacuum circuit breaker is named after its interrupting medium and the insulating medium of the contact gap after interrupting is high vacuum; it has the advantages of small size, light weight, suitable for frequent operation and interrupting without maintenance, and is more popularly used in the 3kV-40.5kV distribution network.

  The components of vacuum circuit breaker are vacuum interrupter, spring-operated mechanism, bracket and other parts.

  Vacuum interrupter is the core component of vacuum circuit breaker, its main role is, through the excellent insulation of the vacuum inside the tube to make the medium and high voltage circuit cut off the power can quickly extinguish the arc and suppress the current to avoid accidents and accidents.

  Detail display

  Types of VSG Operating mechanism

  The VSG mechanism uses a cam (in the core module of the mechanism) to drive the spindle directly (in the frame spindle module) to reduce the transmission link and improve the transmission efficiency (no hinge connection). Reduce the energy input of the product and increase the service life of the product. Install the main circuit module, that is, complete the basic configuration of the vacuum circuit breaker. Then install the chassis car module, the contact arm, the contact, and the insulating sleeve to complete the configuration of the hand-cranked circuit breaker.

  Normal use environment.
  1. The ambient air temperature does not exceed 40C, and the average value measured within 24h does not exceed 35℃.
  2. The minimum ambient air temperature is -5℃ for the “-5 indoor” level, -15℃ for the “-15 indoor” level and -25℃ for the “-25 indoor” level. 15℃, and -25℃ for the “-25 house” level.
  3. The effect of sunlight radiation can be ignored.
  4. The altitude does not exceed 1000m.
  5. The surrounding air is not significantly contaminated by dust, smoke, corrosive and/or flammable gases, vapors or salt spray.

   

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