Product Overview
The ZW32-12 Primary and Secondary Fusion Pole-Mounted Circuit Breaker Capacitive Power Extraction Type (Measurement Control Device, Integrated Fault Isolation) is an outdoor power distribution device used in 12kV voltage and three-phase AC 50Hz, mainly used for breaking overload current, short-circuit current, and automated devices for line fault detection, diagnosis, and handling. Integrated design of the switch body, power access unit, measurement unit, and control unit: features simple installation and convenient maintenance, making it a device for automated feeder system for distribution lines.
The circuit breaker is equipped with a unified standardized current-voltage integrated sensor, featuring a wide measurement range, high accuracy, and high reliability. It offers comprehensive analog data and accurately determines various line faults.
Citation Standards:
IEC56-427 "High Voltage AC Circuit Breaker"
GB/T1984-2014 "High Voltage AC Circuit Breaker"
GB/T11022-2011 "Common Technical Requirements for Standards for High Voltage Switchgear and Control Equipment"
SD132-89 "Technical Specifications for High-Voltage AC Circuit Breakers"
GB/T13384-1992 "General Technical Conditions for Packaging of Electromechanical Products"
DL/T402-2016 "High Voltage AC Circuit Breaker Ordering Conditions"
Model and meaning
Main technical parameters
Main technical parameters of the circuit breaker
| Project name | Unit | Technical specifications |
| Rated voltage | kV | 12 |
| 1 min power frequency withstand voltage Ud | kV | 42 alternating and ground-to-ground sections, 48 fractures |
| Rated Impulse Withstand Voltage Up (Peak) | kV | Alternating and ground-to-ground 75, fracture 85 |
| Rated current A | A | 630 |
| Rated short-circuit breaking current | kA | 20、25 |
| Rated short-circuit breaking current number of breaks | Times | ≥ 30 |
| Rated short-circuit closing current (peak value) | kA | 50、63 |
| Rated peak withstand current | kA | 50、63 |
Mechanical characteristic parameters of circuit breakers
| Project name | Unit | Technical specifications |
| Rated short-term withstand current | kA | 20、25 |
| Rated short circuit duration | s | 4 |
| Rated operation sequence | O-0.3s-CO-180s-CO | |
| Mechanical lifespan | Times | ≥ 10000 |
| Rated operating voltage | V | DC24 |
| Energy storage time at rated voltage | s | <10 |
| Partial discharge | pC | ≤ 10(14.4KV) |
Technical parameters of voltage transformers
| Project name | Unit | Technical specifications |
| Contact head spacing | mm | 9±1 |
| Contact overtravel | mm | 2±0.5 |
| Average gate opening speed | m/s | 1.2±0.2 |
| Average closing speed | m/s | 0.7±0.2 |
| Contact closing bounce time | ms | ≤ 2 |
| Three-phase closing has different phases | ms | ≤ 2 |
| Three-phase sluice gates have different phases | ms | ≤ 2 |
| Closing time (electric) | ms | ≤ 50 |
| Opening time (electric) | ms | ≤ 45 |
| DC resistor in the main circuit of each phase | μΩ | ≤ 80 |
| The interphase center distance | mm | 340 |
Technical parameters of voltage transformers
| Project name | Technical specifications |
| Rated voltage ratio | Phase sequence: (10/√3)/(3.25V/√3) Zero sequence: (10/√3)/(6.5V/3) |
| Implementation methods | Capacitive voltage divider |
| Accuracy level | Phase sequence: 0.5 order, zero sequence 3P class |
| Temperature range | -40~ 50℃ |
| Insulation resistance (to ground) | ＞1000MΩ |
| Load impedance | ≥ 5MΩ |
Main technical parameters of the circuit breaker
| Project name | Technical specifications |
| Rated current ratio | Phase sequence: 600A/1V, zero sequence: 20A/0.2V |
| Implementation methods | Low power electromagnetic type |
| Accuracy level | Phase sequence: 0.5s/5P 10 levels, zero sequence 1/10P 10 levels |
| Temperature range | -40~ 50℃ |
| Load impedance | ≥ 20kΩ |
Operating environment conditions
Ambient temperature: temperature 50°C, low temperature -40°C. Daily temperature difference 35K;
Relative humidity: daily average <95%, monthly average <90%;
Altitude: below 3000m:
Wind speed: not exceeding 35m/s (equivalent to air pressure 700Pa);
Pollution level: Level IV;
Ice coating thickness: 10mm;
Locations free from fire, explosion, chemical corrosion, and frequent severe vibrations;
Note: When the usage environment differs from the above application environment, consultation between the user and the manufacturer is required.
Product structural design and dimensions
