ZW32I-12T630 deep fusion pole-mounted circuit breaker

1. Introduction:

The ZW32I-12T630 deep fusion pole-mounted circuit breaker adopts a three-pole linkage structure driven by a spring operating mechanism. Each phase pole integrates a vacuum interrupter, a voltage and current sensor, and a power-taking capacitor to realize line opening and closing, voltage and current detection, and power extraction. electricity and other functions. Meet the development requirements of distribution network automation, miniaturization and intelligence. It has the advantages of compact structure, light weight, and maintenance-free. Both ends of the incoming and outgoing lines are equipped with voltage sensors and capacitors to take power. In addition to being used as a boundary circuit breaker, it can also be used as a segment and connection circuit breaker

2. Product Features:

1. It adopts a three-pole linkage structure, and the three-phase solid-sealed pole has a base and an operating mechanism.
2. The pole adopts epoxy resin + encapsulation technology, which is anti-ultraviolet, anti-collision and maintenance-free.
3. The pole integrates vacuum arc extinguishing, voltage and current sensors, and power-taking capacitors, and has the advantages of compact structure, 4. Small size, light weight, and maintenance-free.
5. The voltage sensor adopts capacitive voltage divider + isolation structure, which is accurate, safe and anti-interference
5. The current sensor adopts low power consumption, low temperature floating iron core coil, which is accurate, safe and anti-interference.
6. Capacitor power-taking function replaces traditional PT power-taking, small size, light weight, low power consumption, avoiding ferromagnetic saturation and ferromagnetic resonance.
7. A set of EVT and capacitors can be installed at both ends of the incoming and outgoing lines of each phase insulation pole to take power, meeting the requirements of demarcation, segmentation, and contact circuit breakers
8. The operating mechanism is operated by the most reliable spring operating mechanism, with reliable action and long mechanical life
9. The circuit breaker adopts a fully sealed structure, with moisture-proof and anti-condensation performance, and can be used in high-temperature and humid areas

3. Implementation and Reference Standards
3.1. GB1984-2003 High Voltage AC Circuit Breaker

3.2. Common technical requirements of GB/T11022-1999 high-voltage switchgear and control equipment standards

3.3. JBT11203-2011 Standard for Embedded Pole for High Voltage AC Vacuum Switchgear

3.4.TCES018-2018 Technical Conditions of 10kV and 20kV AC Sensors for Distribution Network

4. Basic parameters
rated value

   Rated voltage: 12kV

   Rated frequency: 50Hz

   Rated current: 630A

insulation level

   Rated voltage factor: 1.2 (continuous), 1.9 (8 hours)

   1min power frequency withstand voltage, dry test: 42kV/48kV (fracture)

   1min power frequency withstand voltage, wet test: 34kV

   Partial discharge: ≤20pC (14.4kV)

   Lightning impulse withstand voltage (peak value): 75/85kV

   Insulation resistance: ≥1000MΩ

Current carrying capacity

   Loop resistance per phase: ≤80µΩ

   Continuous thermal current (temperature rise less than 50k): 1.1InA

   Short-time withstand current: 20kA (4s)

   Rated peak withstand current: 50kA

breaking capacity

   Rated short-circuit breaking current: 20kA

   Rated short-circuit making current (peak value): 50kA

   Rated Operating Sequence: C-0.3s-CO-180s-CO

   Electrical life (rated short-circuit current breaking times): 30 times

   Mechanical life: 10000 times

Mechanical parameters of circuit breaker

   Contact opening distance: 9±1mm

   Contact overtravel: 2mm

   Average closing speed: 0.6±0.2m/s

   Average opening speed: 1.1±0.2m/s

   Closing bounce time: ≤2ms

Three phase out of phase: ≤1ms

   Closing time: ≤45ms

   Opening time: ≤40ms

spring operating mechanism

   Energy storage motor rated voltage: DC24V

   Energy storage motor rated power: 70W

   Rated operating voltage: DC24V

Some performance indicators of the voltage sensor

   Temperature range: -40℃～+70℃

   Rated frequency: 50Hz

   Rated primary voltage: 10/√3kV

   Rated primary voltage: phase sequence: 3.25/√3V, zero sequence: 6.5/3V

   Basic accuracy: 0.5/3P

   Rated load: comprehensive impedance 1MΩ

   Accuracy vs Frequency:

     0.5 level or 1 level (frequency range 49.5 ~ 50.5Hz)

     3P (Frequency change range 48～51Hz)

   Insulation resistance: 1000MΩ

Some performance indicators of current sensor

   Temperature range: -40℃～+70℃

   Rated frequency: 50Hz

   Rated primary current: phase sequence 600A, zero sequence 20A

   Rated secondary voltage: phase sequence 1V, zero sequence 0.2V

   Basic accuracy: phase sequence 0.5S/5P10, zero sequence 1S/10P10

   Comprehensive impedance: 20kΩ

   Rated continuous thermal current: 720A

   Rated short-time thermal current: 20kA/3s

   Rated dynamic current: 50kA

5. Structural parameters