Whatsapp
Selecting the right switching device for a 35kV class power system requires more than checking voltage ratings. Engineers must consider fault clearing capability, insulation coordination, installation environment, maintenance requirements, and future grid expansion. The 40.5KV Vacuum Circuit Breaker is designed for these demanding requirements, providing dependable circuit protection for utility substations, industrial power distribution systems, renewable energy plants, and infrastructure projects.
Unlike conventional breakers that require frequent inspection of arc extinguishing media, this 40.5KV Vacuum Circuit Breaker adopts a sealed vacuum interruption structure with long service intervals and stable dielectric performance. It can be integrated into indoor switchgear panels, outdoor switchgear systems, and customized substation configurations. For higher environmental protection requirements, it can also be supplied as an Outdoor Vacuum Circuit Breaker, while projects requiring integrated protection measurement can combine it with a Current Transformer Circuit Breaker solution.
Designed according to international medium-voltage switchgear practices, the breaker supports flexible configuration including spring-operated mechanisms, motor charging systems, protection relay interfaces, auxiliary contacts, and remote operation modules. This makes it suitable for both new substation construction and replacement projects where improving reliability and reducing maintenance costs are key objectives.
The 40.5KV Vacuum Circuit Breaker is widely selected for medium-voltage power systems where safe isolation and fast fault clearance are required.
| Application Area | Typical Usage |
|---|---|
| Utility Substations | Transformer feeders, incoming lines, bus section protection |
| Industrial Power Systems | Mining plants, factories, chemical facilities, steel mills |
| Renewable Energy Projects | Wind farms, solar collection substations, energy storage systems |
| Infrastructure Projects | Railway power supply, airports, commercial buildings |
| Parameter | Specification |
|---|---|
| Rated Voltage | 40.5 kV |
| Maximum System Voltage | 42 kV |
| Rated Frequency | 50 / 60 Hz |
| Rated Current | 630 A / 1250 A / 2000 A / 2500 A |
| Rated Short-Circuit Breaking Current | 25 kA / 31.5 kA |
| Rated Short-Circuit Making Current | 63 kA / 80 kA peak |
| Short-Time Withstand Current | 25 kA / 31.5 kA (4 seconds) |
| Power Frequency Withstand Voltage | 95 kV (1 minute) |
| Lightning Impulse Withstand Voltage | 185 kV |
| Mechanical Endurance | 10,000 operations (M2 class) |
| Operating Mechanism | Motor charged spring mechanism |
| Control Voltage | DC 24V / 48V / 110V / 220V |
| Installation Type | Indoor fixed, withdrawable, outdoor enclosure |
| Protection Grade | IP4X indoor / IP54-IP65 outdoor option |
| Applicable Standards | IEC 62271-100, IEC 62271-200, ANSI C37 Series |
Compared with traditional oil circuit breakers and basic vacuum breaker designs, the 40.5KV Vacuum Circuit Breaker provides advantages in maintenance efficiency, environmental adaptability, and smart grid integration.
| Feature | 40.5KV Vacuum Circuit Breaker | Traditional Oil Circuit Breaker | Standard Basic Vacuum Breaker |
|---|---|---|---|
| Arc Extinguishing Medium | Vacuum interrupter | Insulating oil | Vacuum interrupter |
| Maintenance Requirement | Low maintenance, sealed interrupter | Regular oil inspection required | Normal maintenance |
| Environmental Impact | No oil leakage risk, SF6-free option | Potential oil pollution risk | Low environmental impact |
| Smart Grid Integration | Compatible with SCADA and digital relays | Limited communication capability | Depends on configuration |
| Typical Service Life | 20-30 years depending on operation conditions | Shorter due to insulation aging | 20+ years |
The 40.5KV Vacuum Circuit Breaker provides a higher insulation level and safety margin compared with standard 35kV class breakers. It is commonly selected for 35kV networks where additional dielectric reliability is required.
It can be installed in utility substations, industrial distribution systems, renewable energy plants, mining facilities, and infrastructure power networks.
No. The vacuum interrupter design eliminates SF6 gas filling, leakage monitoring, and gas maintenance procedures.
The breaker can work with protection relays supporting overcurrent protection, earth fault protection, short circuit protection, remote control, and SCADA monitoring.
Yes. Custom options include rated current, operating mechanism, control voltage, communication interfaces, CT integration, and outdoor enclosure design.
The product can be manufactured according to IEC 62271-100 and related international medium-voltage switchgear standards.
As a professional medium-voltage switchgear manufacturer, we provide complete customization services for utilities, EPC contractors, and industrial power users. From technical parameter selection to installation configuration, our engineering team supports project requirements with reliable products and application experience.
Contact us today for datasheets, technical drawings, OEM requirements, and project quotations for your 40.5KV Vacuum Circuit Breaker application.
