Wholesale VSB-12 Indoor High-Voltage Vacuum Circuit Breaker Manufacturers, Manufacturer
Wholesale VSB-12 Indoor High-Voltage Vacuum Circuit Breaker Manufacturers, Manufacturer
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Wholesale VSB-12 Indoor High-Voltage Vacuum Circuit Breaker Manufacturers, Manufacturer
Wholesale VSB-12 Indoor High-Voltage Vacuum Circuit Breaker Manufacturers, Manufacturer

Wholesale VSB-12 Indoor High-Voltage Vacuum Circuit Breaker Manufacturers, Manufacturer

The VSB-12 Indoor High-Voltage Vacuum Circuit Breaker is designed for 12kV power systems, offering rated currents from 630A to 4000A and short-circuit breaking capacity up to 40kA. This VSB-12 Indoor High-Voltage Vacuum Circuit Breaker ensures reliable performance with high insulation strength, mechanical endurance of 20,000 operations, and low contact resistance. Suitable for a wide range of indoor applications, the VSB-12 Indoor High-Voltage Vacuum Circuit Breaker supports both AC and DC control voltages, features rapid opening/closing times, and is built for long-term stability under frequent switching conditions.

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Product Description

Type Designation

Brand: MINGRI
Product Name: High-Voltage Vacuum Circuit Breaker
Model: VSB-12
Rated Voltage: 12kV
Rated Current: 63A
Rated Frequency: 50Hz
Altitude: ≤1000 meters
Mechanical Life: 20,000 operations

Technical Parameters

No. Item Unit Value
1 Rated Voltage kV 12
2 Maximum Operating Voltage kV 12
3 Rated Current A 630
1250		 630 1250
1600 2000
2500 3150		 1250 1600
2000 2500
3150 4000
4 Rated Short-Circuit Breaking Current (Rated Short-Time Withstand Current - RMS Value) kA 20/25 31.5 40
5 Rated Short-Circuit Making Current (Peak) kA 50/63 80 100
6 Rated Peak Withstand Current(Rated Peak Withstand Current-Peak) kA 50/63 80 100
7 4S Rated Short-Circuit Withstand Voltage kA 20/25 31.5 40
8 Rated Insulation Level Power-Frequency Withstand Voltage (1min) (Before and After Rated Breaking) KV Phase-to-Earth42(Across Isolating Distance48)
Impulse Withstand Voltage (Before and After Rated Breaking)/Rated Lightning Impulse Withstand Voltage (Peak) Phase-to-Earth75(Across Isolating Distance85)
9 Rated Short-Time Withstand Current Duration s 4
10 Rated Operating Sequence O-0.3s-CO-180s-CO
11 Mechanical Life time 20000
12 Rated Short-Circuit Current Breaking Operations time 50
13 Operating Mechanism Rated Closing Voltage (DC) V AC、DC 110,220
14 Operating Mechanism Rated Opening Voltage (DC) V AC、DC 110,220
15 Contact Gap mm 11±1
16 Over-Travel(Contact Spring Compression Length) mm 3.5±0.5
17 Three-Phase Contact Bounce Time (During Opening/Closing) ms ≤2
18 Contact Bounce Time During Closing ms ≤2
19 Average Opening Speed m/s 0.9-1.2
Average Closing Speed m/s 0.5~0.8
20 Opening time At Maximum Operating Voltage s ≤0.05
21 At Minimum Operating Voltage ≤0.08
22 Closing time s 0.1
23 Main Circuit Resistance UΩ 630≤50 1250≤45
24 Permissible Cumulative Wear Thickness of Moving/Fixed Contacts mm 3

Product Display

VSB-12 High-Voltage Vacuum Circuit Breaker
VSB-12 Indoor High-Voltage VCB

Outline and Installation Dimension

Inside the brackets: 275mm phase spacing

VSB-12 Outline and Installation Dimensions

Ordering Instructions

Order Specifications Required from Customers:
a) Product Name: Model Number, Rated Current;
b) Rated Current, Number of Poles;
c) Minimum order Quantity.

Frequently Asked Questions

What is the rated voltage of the VSB-12 Vacuum Circuit Breaker?
The VSB-12 High-Voltage Vacuum Circuit Breaker has a rated voltage and maximum operating voltage of 12kV at 50Hz frequency.
What is the mechanical life of this vacuum circuit breaker?
The mechanical life of the MINGRI VSB-12 model is rated at up to 20,000 operations, ensuring long-term durability and low maintenance.
What operating voltage options are available for the mechanism?
The operating mechanism supports rated closing and opening voltages of AC/DC 110V and AC/DC 220V.
What is the standard altitude limit for the VSB-12?
The standard design is engineered to perform reliably at altitudes of ≤1000 meters above sea level.
What information is needed when placing an order?
Customers need to specify the product name, model number, rated current, number of poles, and the minimum order quantity.

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