33kV electrical circuit breakers VCB Vacuum Circuit Breaker
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
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
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.
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.
Customer Visit Photos
Online store
On-time delivery rate
Response time
100.0%
≤4h
Company overview
Workplace: 108000m²m²
Total staff: 700+
Highest Annual Export(usD): 150000000
Services
Business Type: Design/Manufacture/Sales
Main Categories: High Voltage Electrical Apparatus/Electric transformer
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.
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