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ZW20-12F
Fenarro
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Developed with Toshiba VSP5 sealing and insulation technology, the ZW20-12F breaker ensures reliable performance even in harsh environments.
Internal SF6 gas is fully sealed, guaranteeing no leakage and long-term insulation stability.
The operating mechanism uses direct chain drive and multi-stage trip system, providing improved reliability compared to traditional mechanisms.
Contact resistance is low, with minimal temperature rise due to the advanced inner-expansion and outer-contraction chain structure.
Fully compliant with GB1984, GB/T11022, and related IEC standards.
Integrated protection and automation: overcurrent protection, grounding protection, reclosing function, event recording, and fault location.
The ZW20-12F breaker is widely used in:
Opening and closing load current and short-circuit current in 10kV power systems.
Substations and industrial/mining distribution systems for protection and control.
Distribution automation systems with “Four Remote” functions (remote control, measurement, signaling, and regulation).
Boundary breaker applications between utilities and end users, providing full protection and fast fault isolation.
Flexible operation – Supports electric/manual energy storage and remote/local operation.
Excellent breaking capacity – Capable of interrupting rated short-circuit current up to 30 times.
Compact & reliable mechanism – New miniaturized spring system with low operating power (approx. 40W).
Versatile installation – Can be pole-mounted or base-mounted.
Maintenance-free – All key components sealed in SF6 gas, unaffected by external conditions.
Superior sealing – Advanced sealing technology ensures long-term reliability.
High insulation performance – Silicone rubber bushings provide excellent insulation distance and safety.
Explosion-proof design – Equipped with a pressure relief device for safe fault handling.
Automation-ready – Compatible with intelligent controllers, supporting “Four Remote”functions.
| Serial No. | Item | Unit | Numerical Value |
|---|---|---|---|
| 1 | Rated Voltage | kV | 12 |
| 2 | Rated Current | A | 630, 1250 |
| 3 | Rated Frequency | Hz | 50 |
| 4 | Power Frequency Withstand Voltage (1min) | ||
| Dry - type (Phase - to - phase, Phase - to - ground/Break) | kV | 42/48 | |
| Wet - type (Phase - to - ground, External Insulation) | kV | 34 | |
| 5 | Lightning Impulse Withstand Voltage (Peak Value) (Phase - to - phase, Phase - to - ground/Break) | kV | 75/85 |
| 6 | Rated Short - circuit Breaking Current | kA | 20, 25 |
| 7 | Rated Short - circuit Making Current (Peak Value) | kA | 50, 63 |
| 8 | Rated Peak Withstand Current | kA | 50, 63 |
| 9 | 4s Short - time Withstand Current | kA | 20, 25 |
| 10 | Rated Operating Sequence | - | Open - 0.3s Close & Open - 180s Close & Open |
| 11 | Number of Rated Short - circuit Current Breaking Operations | times | 30 |
| 12 | Mechanical Life | times | 10000 |
| 13 | Power Frequency Withstand Voltage of Secondary Circuit (1min) | kV | 2 |
Developed with Toshiba VSP5 sealing and insulation technology, the ZW20-12F breaker ensures reliable performance even in harsh environments.
Internal SF6 gas is fully sealed, guaranteeing no leakage and long-term insulation stability.
The operating mechanism uses direct chain drive and multi-stage trip system, providing improved reliability compared to traditional mechanisms.
Contact resistance is low, with minimal temperature rise due to the advanced inner-expansion and outer-contraction chain structure.
Fully compliant with GB1984, GB/T11022, and related IEC standards.
Integrated protection and automation: overcurrent protection, grounding protection, reclosing function, event recording, and fault location.
The ZW20-12F breaker is widely used in:
Opening and closing load current and short-circuit current in 10kV power systems.
Substations and industrial/mining distribution systems for protection and control.
Distribution automation systems with “Four Remote” functions (remote control, measurement, signaling, and regulation).
Boundary breaker applications between utilities and end users, providing full protection and fast fault isolation.
Flexible operation – Supports electric/manual energy storage and remote/local operation.
Excellent breaking capacity – Capable of interrupting rated short-circuit current up to 30 times.
Compact & reliable mechanism – New miniaturized spring system with low operating power (approx. 40W).
Versatile installation – Can be pole-mounted or base-mounted.
Maintenance-free – All key components sealed in SF6 gas, unaffected by external conditions.
Superior sealing – Advanced sealing technology ensures long-term reliability.
High insulation performance – Silicone rubber bushings provide excellent insulation distance and safety.
Explosion-proof design – Equipped with a pressure relief device for safe fault handling.
Automation-ready – Compatible with intelligent controllers, supporting “Four Remote”functions.
| Serial No. | Item | Unit | Numerical Value |
|---|---|---|---|
| 1 | Rated Voltage | kV | 12 |
| 2 | Rated Current | A | 630, 1250 |
| 3 | Rated Frequency | Hz | 50 |
| 4 | Power Frequency Withstand Voltage (1min) | ||
| Dry - type (Phase - to - phase, Phase - to - ground/Break) | kV | 42/48 | |
| Wet - type (Phase - to - ground, External Insulation) | kV | 34 | |
| 5 | Lightning Impulse Withstand Voltage (Peak Value) (Phase - to - phase, Phase - to - ground/Break) | kV | 75/85 |
| 6 | Rated Short - circuit Breaking Current | kA | 20, 25 |
| 7 | Rated Short - circuit Making Current (Peak Value) | kA | 50, 63 |
| 8 | Rated Peak Withstand Current | kA | 50, 63 |
| 9 | 4s Short - time Withstand Current | kA | 20, 25 |
| 10 | Rated Operating Sequence | - | Open - 0.3s Close & Open - 180s Close & Open |
| 11 | Number of Rated Short - circuit Current Breaking Operations | times | 30 |
| 12 | Mechanical Life | times | 10000 |
| 13 | Power Frequency Withstand Voltage of Secondary Circuit (1min) | kV | 2 |
