The circuit breaker has an outdoor compact floor-mounted tank-type structure, equipped with a CT35 spring operating mechanism. The mechanism is integrally mounted with the body, ensuring simple installation, easy commissioning, and reliable operation, making it suitable for frequent operations. The mechanism’s lifespan exceeds 10,000 operations.
It adopts a compressed air arc-extinguishing structure with strong breaking capability. It can interrupt 40 kA of fault current up to 12 times, setting a domestic record. The sealing performance is reliable, using imported sealing gaskets. The dynamic seal employs a “V”-shaped sealing ring with a spring pressure compensation structure. The secondary wiring board for the current transformer is supplied by a joint venture, ensuring an annual leakage rate of <0.5%.
The internal current transformers use microcrystalline alloy materials with high magnetic conductivity, and the accuracy class can reach 0.2 or 0.2S. Based on user requirements, up to 12 current transformers can be included. It is capable of handling no-load long lines of up to 50 km without reignition.
No. Parameter Name Unit Parameter Value 1 Rated voltage kV 40.5 2 Rated insulation level kV 185 (lightning impulse, full wave peak) /
95 (power frequency, 1 min)3 Rated current A 2000 4 Mechanical life Times 10,000 5 Rated SF6 gas pressure (20℃ gauge pressure) MPa 0.5 6 Alarm/minimum functional pressure (20℃ gauge) MPa 0.45 7 Rated short-circuit breaking current kA 40 8 Rated short-circuit making current (peak) kA 100 9 Rated short-time withstand current (thermal) kA 40 10 Rated short-time withstand current (dynamic) kA 100 11 Rated out-of-step breaking current kA 10 12 Accumulated breaking times (rated short-circuit) Times 12 13 Rated short-circuit duration s 4 14 Closing time (rated operating voltage) s ≤0.15 15 Opening time (rated operating voltage) s ≤0.06 16 Rated operating sequence – O—0.3s—CO—180s—CO* 17 Rated switching current (single capacitor bank) A 400 18 SF6 gas annual leakage rate %/Year ≤0.5 19 SF6 gas moisture content (V/V) ppm ≤150×10⁻⁶ 20 Rated operating voltage (CT14 spring mechanism) – See notes 21 Closing/Opening coil voltage V DC 110/220 22 Energy storage motor voltage V AC 220/380; DC 110/220 23 SF6 gas weight kg 8 24 Circuit breaker weight (including mechanism) kg 1400
The ZCW10-40.5 Open Type Combined Electrical Apparatus is a high-voltage power distribution solution engineered for reliable, durable, and efficient operation in industrial substations, commercial power networks, and high-voltage distribution systems. Its open-type design allows for easy maintenance, rapid inspection, and efficient fault management, making it an ideal choice for modern electrical infrastructure.
This comprehensive guide covers performance testing, energy efficiency standards, maintenance techniques, and technical advantages, providing essential knowledge for engineers, operators, and procurement professionals in the high-voltage sector.
The ZCW10-40.5 apparatus combines switching, protection, and control functions into a single unit, supporting high-voltage AC applications up to 40.5kV. Its robust construction ensures long-term durability, while the open-type configuration allows flexible installation and rapid maintenance access.
Rated Voltage: 40.5kV
Open-Type Configuration: Simplifies maintenance and inspection
High Reliability: Minimizes downtime and operational risk
Durable Design: Resistant to dust, humidity, UV exposure, and mechanical wear
Integrated Functions: Combines switching, protection, and monitoring
Maintenance-Friendly: Easy access to critical components
| Parameter | Value |
|---|---|
| Product Model | ZCW10-40.5 Open Type Combined Electrical Apparatus |
| Rated Voltage | 40.5 kV |
| Rated Current | 630A / 1250A / 1600A (depending on configuration) |
| Short-Circuit Breaking Capacity | 20kA – 31.5kA |
| Insulation Medium | Air / SF6 depending on unit design |
| Mechanical Endurance | ≥ 10,000 operations |
| Operating Temperature | -40°C to +50°C |
| Applications | Outdoor substations, industrial power networks, high-voltage distribution |
Performance testing ensures that the ZCW10-40.5 apparatus operates safely, reliably, and efficiently under all conditions.
Insulation Resistance Test: Confirms proper insulation between phases and to ground.
Contact Resistance Test: Measures resistance at switch contacts to ensure minimal energy loss.
High-Voltage Withstand Test: Validates the ability to withstand rated and transient voltages without breakdown.
Operating Mechanism Test: Checks spring, motor, or manual mechanisms for smooth and rapid switching.
Endurance Test: Simulates 10,000 operations to ensure durability over long-term use.
Control System Verification: Ensures interlocks, alarms, and remote operation functions work correctly.
Arc Quenching Efficiency: Confirms SF6 or air insulation prevents damage during short-circuit interruptions.
The ZCW10-40.5 apparatus is designed in compliance with modern energy efficiency and environmental standards, reducing operational losses and carbon footprint.
High-conductivity contacts and optimized busbar connections reduce energy loss.
SF6 insulation minimizes arcing and energy dissipation.
IEC 62271 series for high-voltage switchgear.
GB/T 11022 and relevant national power distribution standards.
Energy efficiency certifications ensuring minimal operational losses.
Minimal SF6 leakage with sealed chambers.
Reduced maintenance energy consumption through easy-access components and low lubrication requirements.
Regular maintenance ensures long-term reliability and Safe Operation of the apparatus.
Visual Checks: Inspect housing, terminals, and insulators monthly.
Lubrication: Apply recommended lubricants to mechanical linkages quarterly.
Mechanical Operation: Test manual or automatic switching mechanisms.
Disassemble key components for inspection, cleaning, and replacement if necessary.
Verify contact integrity, insulation resistance, and SF6/air pressure.
Check control circuits, alarms, and remote operation systems.
External Housing: Wipe with soft, non-abrasive cloths.
Insulators and Terminals: Remove dust using dry brushes or approved cleaning agents.
Contacts and Arc Chambers: Inspect for erosion; clean with non-abrasive tools.
Always de-energize the apparatus before maintenance.
Wear appropriate personal protective equipment (PPE).
Follow manufacturer’s torque and alignment specifications for all components.
The ZCW10-40.5 Open Type Combined Electrical Apparatus offers several technical advantages over traditional distribution equipment:
Robust design ensures minimal downtime and continuous high-voltage protection.
Combines switching, protection, and monitoring in one apparatus, reducing installation space and complexity.
Provides easy access for inspection and maintenance, improving operational efficiency.
Resistant to environmental stressors such as UV radiation, humidity, and dust.
Mechanical components tested for over 10,000 switching cycles.
High-conductivity contacts and optimized busbars minimize operational energy loss.
Compliance with international energy standards reduces environmental impact.
Proper installation is crucial for safe and efficient operation.
Verify foundation stability and grounding.
Ensure adequate clearance for maintenance and ventilation.
Confirm environmental conditions are within -40°C to +50°C.
Place the apparatus on a level and secure foundation.
Connect busbars and terminals according to torque specifications.
Align phases accurately with incoming and outgoing feeders.
Check control circuits, interlocks, and monitoring systems.
Perform insulation resistance and continuity tests before energization.
Test manual and automatic switching.
Verify alarms, interlocks, and remote operation functionality.
| Feature | Description |
|---|---|
| Arc Quenching | SF6 or air insulation ensures fast arc extinction |
| Mechanical Operation | Motor or spring mechanism enables smooth switching |
| Contact System | High-conductivity copper alloy contacts |
| Environmental Resistance | Dust, humidity, and UV-resistant construction |
| Safety Interlocks | Prevents unsafe operation |
| Control Options | Supports manual, automatic, and remote operation |
“ZCW10-40.5 provides exceptional reliability and performance for our high-voltage distribution networks. Maintenance is simple, and operational efficiency has improved dramatically.”
“The open-type design and robust construction make this apparatus ideal for our outdoor substations. SF6 insulation ensures long-term protection with minimal intervention.”
“Our solar and wind substations benefit from integrated protection and monitoring, reducing downtime and ensuring safe operation.”
High Reliability: Ensures continuous protection under high-voltage conditions.
Durable Design: Long-term performance with minimal maintenance.
Maintenance-Friendly: Open-type configuration simplifies inspection and repair.
Energy Efficient: Reduces operational losses and complies with modern standards.
Multi-Functional: Switching, protection, and monitoring integrated in one unit.
Professional Support: Installation guidance, technical support, and after-sales service available.
The ZCW10-40.5 Open Type Combined Electrical Apparatus delivers reliable, durable, and energy-Efficient Power Distribution solutions. Its robust construction, integrated functions, maintenance-friendly open design, and high-voltage performance make it ideal for industrial substations, high-voltage distribution networks, and renewable energy facilities.
With performance testing, maintenance guidelines, technical advantages, and compliance with energy standards, ZCW10-40.5 ensures safe, efficient, and long-lasting operation in demanding high-voltage environments.
Phone: +8613736779975
E-mail: sales@vcbbreaker.com
Address: 66 Punan Road, Yueqing Economic Development Zone, Zhejiang, China
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