ZW32G-24 Outdoor Medium Voltage Vacuum Circuit Breaker
ZW32G-24 outdoor high-voltage vacuum circuit breaker is a cutting-edge power distribution device engineered to meet the demanding requirements of modern power systems. With a rated voltage of 24kV and operating at 50Hz in three-phase AC, it is specifically designed for outdoor applications in power stations, industrial and mining enterprises, as well as rural power grids where frequent operations are common.
This versatile breaker can serve multiple crucial roles. It functions as a reliable ring network power supply unit and terminal equipment, facilitating the efficient distribution, control, and protection of electrical equipment. When integrated with an isolation switch, it transforms into a highly effective sectional switch. Its primary purpose is to handle the opening and closing of load currents, overload currents, and short-circuit currents with precision and safety, ensuring the stable operation of the power system.
Outstanding Features
Innovative Vacuum Interrupter: Equipped with a patented solid-sealed vacuum interrupter, it offers enhanced performance and durability, minimizing the risk of arc faults and ensuring long-term reliable operation.
Superior Insulation and Weather Resistance: The external insulation with silicone rubber bushings not only provides excellent insulation properties but also exhibits outstanding weather resistance. This allows the breaker to withstand harsh environmental conditions, from extreme temperatures to heavy rain and UV exposure, ensuring a long service life and minimal maintenance requirements.
Efficient Operating Mechanism: The compact and highly reliable spring operating mechanism, with its simple structure, offers a mechanical life of up to 10,000 operations. For even greater stability and reliability, an advanced permanent magnet mechanism is available as an option, guaranteeing consistent performance over time.
Manual Operation Capability: In addition to its automated functions, the breaker can be equipped with a manual opening and closing mechanism. This provides a failsafe option, allowing for on-site manual operation in case of emergencies or system failures, ensuring uninterrupted power supply.
Smart Grid Integration: When paired with a controller, the ZW32G-24 becomes a sophisticated recloser, enabling remote control, telemetry, remote signaling, and remote adjustment – the renowned “four-remote” functions. This integration empowers operators to monitor and manage the breaker from a distance, enhancing the overall efficiency and responsiveness of the power distribution network.
Compliance with Standards
The ZW32G-24 adheres to a comprehensive set of industry-leading standards, including
GB1984 “AC High Voltage Circuit Breakers”,
GB11022 “Common Technical Requirements for High-Voltage Switchgear and Control Equipment Standards”,
GB311.1-6 “Insulation Coordination for High Voltage Transmission and Transformation Equipment”,
GB763 “Heating of AC High Voltage Electrical Apparatus in Long-Term Operation”,
GB2706 “Dynamic and Thermal Stability Test Methods for AC High Voltage Electrical Apparatus”,
GB3309 “Mechanical Tests on High-Voltage Switchgear at Ambient Temperature”,
DL/T593 “Common Ordering Technical Conditions for High-Voltage Switchgear”.
This strict compliance ensures that the breaker meets the highest quality and performance benchmarks, providing customers with peace of mind and reliable power distribution.
Environmental Adaptability
Altitude: It can operate smoothly at altitudes up to 2000m, making it suitable for a wide range of geographical locations, from plains to mountainous regions.
Temperature Range: The breaker is designed to function reliably in ambient air temperatures ranging from -40°C to +40°C, ensuring consistent performance in both cold and hot climates.
Wind Resistance: With a wind speed tolerance of ≤34m/s (equivalent to 700Pa on the cylindrical surface), it can withstand strong winds, maintaining its structural integrity and operational stability.
Pollution Level: Rated at the TIV level, it is resistant to environmental pollution, ensuring reliable performance even in areas with moderate levels of dust and contaminants.
Vibration and Seismic Resistance: It is engineered to handle no frequent severe vibrations, and can withstand seismic intensities not exceeding 8 degrees, providing added safety and reliability in earthquake-prone regions.
Safe Environment: The breaker is suitable for installation in areas free from fire, explosion, or chemical corrosion, ensuring the safety of both the equipment and the surrounding environment.
Technical Specification
No.
Item
Unit
Data
1
Rated Voltage
KV
24
2
Rated Frequency
HZ
50
3
Rated Current
A
630
4
Rated Short-Circuit Breaking Current
KA
20
5
Rated Peak Withstand Current
KA
50
6
Rated Short-Time Withstand Current
KA
20
7
Rated Short-Circuit Closing Current (Peak)
KA
50
8
Mechanical Life
Times
10000
9
Rated Short-Circuit Breaking Current Breaking Times
Times
30
10
Power Frequency Withstand Voltage (1min): Wet/Dry,
Dry (Between Phases, Phase to Ground/Opening)
KV
30/42/48
11
Lightning Impulse Withstand Voltage (Peak):
Between Phases, Phase to Ground/Opening
KV
75/85
12
Power Frequency Withstand Voltage of Secondary Circuit (1min)
