ZW32-12 Pole-Mounted Outdoor Vacuum Circuit Breaker | Reliable High Voltage Protection

Feature

3 configurations for the transformer combination: electromagnetic type (external protection, integrated zero-sequence current transformer, and zero-sequence voltage transformer) and electronic type (external electronic current and voltage transformers).

The feeder terminal features a cover structure and corresponds to the transformer combination modes as electromagnetic feeder terminals, electronic feeder terminals, and digital feeder terminals.

The configured transformers have a wide measurement range, high accuracy, and high reliability, allowing the integrated device to accurately identify various line faults.

Parameter

1. Structural Features: Utilizes a three-phase independent column structure, air-insulated, vacuum arc extinguishing, capable of interrupting short-circuit currents of 20kA up to 30 times.
2. Modular Design: Adopts a modular design concept, allowing flexible interchange of electromagnetic/electronic sensor combinations.
3. Autonomous Capability: The sensor module has qualifications and autonomous production capabilities, with superior performance, a wide measurement range, high accuracy, and strong reliability.
4. State Monitoring: Supports the collection and monitoring of analog and status signals, with remote signaling debounce, local indicators for operating status, communication status, and line fault status.
5. Edge Computing: High-performance edge computing enables on-site analysis of operational conditions.
6. Protection Functions: Capable of precise judgment and rapid isolation of short-circuit faults, grounding faults, and line disconnection faults. Intelligent terminal functions include line loss collection, feeder automation, communication, location, time synchronization, waveform recording, and power management, supporting remote maintenance and high adaptability: suitable for high altitudes, high pollution, high condensation, high salt fog, and extremely cold regions.

Tech. parameters	Unit	Value
Rated voltage	KV	12
Rated current	A	630
Rated frequency	Hz	50
Rated lightning impulse (1,2/50μs) withstand voltage	KV	Interphase, to earth 75/fracture 85
Rated short-time power frequency withstand voltage (1min)	KV	Interphase, to earth 42/fracture 48
Rated short-circuit breaking current	KA	20
Rated breaking times of short-circuit	Times	30
Rated short-time withstand current	KA	20(4s)
Rated peak withstand current	KA	50
Power frequency withstand voltage of secondary loop	KV	2
Partial Discharge (1.1Ur)	pC	≤20
Mounting interfaces	mm	920×160
Phase distance	mm	340
Weight	kg	≤130
Circuit breaker Ingress Protection	/	IP67
Mechanical life	times	20000
Rated operating sequence	/	O-0.3s-CO-180s-CO
Instrument transformer installation method	/	Pole External (Electromagnetic/Electronic)
Feeder automation terminal（FTU） structure form	/	Standardized hood type, box type

Tech. parameters	Tech. parameters	Numeric value
Electromagnetic transformer combination mode	Rated transformation ratio	Phase current transformer: 600A/5A or 600A/1A
		Zero sequence current transformer: 100A/1A (current amplification factor>6)
		Zero Sequence Voltage Sensor: (10kV/)/(6.5V/3)
		Power supply voltage transformer: 10A0.1/0.22kV
	Accuracy class	Phase current transformer: protection 5P10 level, measurement 0.5S level
		Zero sequence current transformer: When the input current of the primary side is 1A to the rated current, it can meet the 1S suction (Phase-angle error, Ratio error), and the protection accuracy level is 5P10.
		Zero sequence voltage sensor: 3P
		Power supply voltage transformer: 0.5/3 class
Electronic transformer combination mode	Rated transformation ratio	Phase current sensor: 600A/1V
		Zero sequence current sensor: 20A/0.2V
		Phase Voltage Sensor: (10kV/)/(3.25V/)
		Zero Sequence Voltage Sensor: (10kV/)/(6.5V/3)
		Power supply voltage transformer: 10kV/0.22kV
	Accuracy class	Phase current sensor: measurement 0.5S level, protection 5P10
		Zero sequence current sensor: When the input current on the primary side is 1A to the rated current, it meets the level of 1S (Phase-angle error, Ratio error), and protects 10P30
		Phase voltage sensor: class 0.5
		Zero sequence voltage sensor: 3P
		Power supply voltage transformer: 3 levels