The circuit breaker, disconnecting switch, grounding switch, current transformer, busbar, and other components are organically combined on a grounded steel frame, resulting in a compact structure. It occupies only 30%-50% of the space compared to a separate-type configuration, offering significant advantages such as land savings and reduced construction costs.
The entire compartment is prefabricated in the factory, with assembly and all commissioning completed before shipment, allowing for transportation as a complete unit to the installation site. This greatly shortens the installation period. The design utilizes highly proven, high-performance arc-extinguishing chambers and disconnecting switches, which require minimal maintenance and have high reliability.
The self-supporting busbar, prefabricated in the factory, eliminates the need for the user to build a frame. The layout is flexible and can accommodate various wiring configurations. The circuit breaker can be fully lowered for maintenance or replacement. In the event of a failure, the downtime can be reduced to less than 3 hours, minimizing power outages.
No. Name Unit Parameter 1 Rated voltage kV 72.5 2 Rated power frequency withstand voltage (1 Minute) – Grounded kV 160 Rated power frequency withstand voltage (1 Minute) – Contact gap kV 200 3 Rated lightning impulse withstand voltage – Grounded kV 350 Rated lightning impulse withstand voltage – Contact gap kV 410 4 Power frequency withstand voltage of SF6 gas at zero gauge pressure (5 min) kV 84 5 Rated frequency Hz 50 6 Rated current A 3150 7 First level coefficient 1.5 8 Rated short-circuit breaking current kA 31.5 9 Rated short-circuit making current (peak value) kA 80 10 Rated short-circuit withstand current kA 31.5 11 Rated peak withstand current kA 80 12 Rated short circuit duration s 4 13 Rated out of step breaking current kA 8 14 Short-range fault breaking current kA 90%Ik, 75%Ik 15 Rated line charging switching current A 10 16 Rated operating sequence 0-0.3s-CO-180s-CO 17 Main circuit resistance µΩ ≤ 40 18 Rated sulfur hexafluoride gas pressure (20°C gauge pressure) MPa 0.5 19 Alarm/minimum function pressure (20°C gauge pressure) MPa 0.45±0.03 20 SF6 gas annual leakage rate <0.5% 21 Gas moisture content (V/V) ≤150×10⁻⁶ 22 Mechanical life Times 10000 23 Radio interference level µV ≤500 24 Creep distance – Contact gap mm 2585 Creep distance – Grounded mm 2248 25 Weight of each unit filled with SF6 gas kg 10 26 Weight of each circuit breaker kg 1300
The ZCW 72.5 126.5 L Open Air Type High Voltage Assembled Switchgear is a robust, high-voltage electrical distribution solution designed for outdoor substation applications. Combining 72.5kV gas-insulated circuit breaker (GIS) technology with open-air outdoor AIS (Air-Insulated Switchgear) design, it provides reliable, durable, and high-performance electrical protection.
This guide covers application scenarios, warranty policy, product advantages, and user guidance, making it an essential reference for engineers, substation operators, and procurement teams.
The ZCW 72.5 126.5 L is engineered for high-voltage outdoor distribution networks, offering enhanced durability, minimal maintenance, and operational safety. Its combination of GIS and AIS technologies allows flexible deployment, high reliability, and rapid response to electrical faults.
Rated Voltage: 72.5kV
Open-Air Type Design: Simplifies inspection and maintenance
Gas-Insulated Circuit Breaker (GIS): Provides superior arc quenching
Outdoor AIS Configuration: Withstands harsh environmental conditions
Durable and Reliable: Ensures long-term performance under extreme weather
Integrated Protection: Combines switching, monitoring, and control functions
| Parameter | Value |
|---|---|
| Product Model | ZCW 72.5 126.5 L Open Air Type Switchgear |
| Rated Voltage | 72.5 kV |
| Rated Current | 1250A – 3150A (configurable) |
| Short-Circuit Breaking Capacity | 20kA – 31.5kA |
| Insulation Medium | SF6 Gas (GIS) / Air (AIS) |
| Mechanical Endurance | ≥ 10,000 operations |
| Operating Temperature | -40°C to +50°C |
| Applications | Outdoor substations, industrial high-voltage networks |
The ZCW 72.5 126.5 L switchgear is suitable for a variety of high-voltage applications, including:
Outdoor Substations
Provides reliable switching and protection for transmission and distribution lines.
Ensures operational stability under extreme weather conditions.
Industrial Power Networks
Protects heavy industrial machinery and high-capacity loads from overloads and short circuits.
Integrates with automation and monitoring systems for efficient energy management.
Renewable Energy Substations
Ideal for solar, wind, and hydroelectric facilities.
Guarantees safe power distribution and fault interruption in remote outdoor installations.
Urban and Critical Infrastructure
Supports data centers, airports, and commercial high-voltage networks requiring high reliability.
The ZCW 72.5 126.5 L offers distinct advantages over traditional outdoor switchgear:
Robust design ensures continuous operation in high-voltage networks.
GIS technology provides rapid arc extinction for high-current faults.
Combines switching, monitoring, and protection in one unit.
Reduces installation space and simplifies substation layout.
Weather-resistant construction protects against dust, humidity, UV exposure, and mechanical stress.
Mechanical components tested for over 10,000 operations.
Easy access to busbars, breakers, and control modules reduces maintenance time.
Supports routine inspections, cleaning, and quick component replacement.
Optimized contacts and busbars reduce energy losses.
Minimizes SF6 leakage with sealed GIS chambers for eco-friendly operation.
Performance testing ensures the apparatus operates safely, reliably, and efficiently.
Insulation Resistance Test: Ensures proper separation between phases and ground.
Contact Resistance Test: Validates low energy loss at switching points.
High-Voltage Withstand Test: Confirms durability under transient overvoltage conditions.
Operating Mechanism Test: Verifies smooth operation of manual and automatic controls.
Endurance Test: Simulates long-term operations to ensure reliability.
Control System Verification: Checks interlocks, alarms, and remote control integration.
Arc Quenching Efficiency: Validates SF6 GIS or air-insulated chambers for fault interruption.
The ZCW 72.5 126.5 L comes with comprehensive warranty and quality assurance policies:
Standard 12–24 months warranty depending on purchase agreement.
Covers manufacturing defects, electrical failures, and mechanical faults.
Includes technical support and component replacement during warranty period.
Manufactured in compliance with IEC 62271, GB/T standards, and international high-voltage regulations.
Each unit undergoes rigorous electrical, mechanical, and environmental testing.
Documentation includes test reports, inspection certificates, and installation manuals.
Proper operation and maintenance ensure long-term safe performance.
Site Preparation: Ensure solid foundation, grounding, and clearance for maintenance.
Positioning and Mounting: Align units for phase compatibility and optimal airflow.
Electrical Connections: Verify all busbars, terminals, and control wiring per specifications.
Operational Testing: Conduct manual and automatic switching tests.
Check control signals, alarms, and breaker status.
Observe environmental conditions for dust, humidity, and temperature extremes.
Inspect contacts, busbars, and insulators monthly.
Lubricate mechanical linkages quarterly.
Perform full annual inspection, including GIS chamber pressure, interlocks, and control system verification.
De-energize equipment before maintenance.
Use PPE and insulated tools.
Follow manufacturer’s torque and alignment specifications.
Challenge: High-voltage distribution reliability in extreme weather.
Solution: Installed ZCW 72.5 126.5 L switchgear with GIS + AIS combination.
Result: Reduced downtime by 40%, simplified maintenance, and improved energy efficiency.
Challenge: Integration of solar and wind power with stable protection.
Solution: Deployed ZCW 72.5 126.5 L for automated switching and monitoring.
Result: Achieved seamless power distribution with minimal operational risk.
Challenge: Space-constrained outdoor substation with high safety requirements.
Solution: Installed open-air type switchgear for easy access and rapid maintenance.
Result: Enhanced safety, reliable operation, and reduced maintenance costs.
High Reliability: Continuous operation under high-voltage conditions.
Durable Construction: Long-lasting performance in outdoor environments.
Maintenance Efficiency: Open-air design simplifies inspection and repair.
Multi-Functional: Switching, protection, and monitoring in one unit.
Energy Efficiency: Minimizes losses and complies with environmental standards.
Warranty Support: Technical assistance and replacement during warranty period.
The ZCW 72.5 126.5 L Open Air Type High Voltage Assembled Switchgear combines high-voltage GIS and outdoor AIS technology to deliver robust, reliable, and durable power distribution solutions. With advanced performance testing, comprehensive warranty, technical advantages, and user-friendly design, it is ideal for industrial substations, renewable energy facilities, and urban high-voltage networks.
By integrating application scenarios, product advantages, maintenance guidance, and real-world case studies, the ZCW 72.5 126.5 L ensures safe, efficient, and long-term operation in demanding outdoor electrical environments.
Phone: +8613736779975
E-mail: sales@vcbbreaker.com
Address: 66 Punan Road, Yueqing Economic Development Zone, Zhejiang, China
Copyright © 2025 Eberry Electric Group All rights reserved
This website uses cookies to ensure you get the best experience on our website.
Español
Portugues
Pусский
العربية
Türk dili
Indonesia
Tiếng Việt
қазақ
فارسی
українська
беларускі
Filipino
o'zbek
български
тоҷикӣ
kiswahili
Монгол
አማራ
Ilocano
Phone