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Primary and Secondary Deeply Integrated Complete Pole-Mounted Circuit Breaker

Product Description

The ZW68 complete pole-mounted circuit breaker is a new outdoor primary and secondary integrated complete set jointly designed by our company and the China Electric Power Research Institute. It is used for the control and protection of three-phase AC 50Hz, rated voltage 12kV distribution network overhead lines. It can be equipped with corresponding automation control interfaces according to customer requirements, or can be purchased as a complete set with the FTU intelligent controller to achieve automatic detection, isolation, and alarm of line faults, monitor line operation, and automatically restore power supply to non-fault sections. It is also equipped with measurement, protection, control, and communication modules to meet distribution automation requirements. While meeting the needs of regular users, it is also suitable for frequent operation and harsh environmental conditions.

Product Advantages

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Single-phase independent structure design

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The internal insulation of the break at rated opening distance meets 1-minute power frequency withstand voltage of 48kV

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Direct-acting modular design

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Arranged horizontally and vertically with the embedded pole vacuum circuit breaker, flexible combined installation

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Fully enclosed in the housing, long mechanical life, maintenance-free

Primary and Secondary Deeply Integrated Complete Pole-Mounted Circuit Breaker

ZW68-12 | HXD837-F30

Outdoor high-voltage AC intelligent vacuum circuit breaker

Model		ZW68-12/T630-20
Operation Mode		Manual/Motorized
Rated Voltage		12 kV
Rated Frequency		50 Hz
Rated Current		630 A
Rated Short-Circuit Breaking Current		20 kA
Rated Peak Withstand Current (Peak)		50 kA
Rated Short-Time Withstand Current (4s)		20 kA
Rated Short-Circuit Making Current (Peak)		50 kA
Rated Current Breaking Cycles		10000 cycles
Rated Short-Circuit Breaking Cycles		30 cycles
1-Minute Power-Frequency Withstand Voltage	Phase-to-Phase, Phase-to-Ground	42 kV
	Across Open Contact	48 kV
	Secondary Circuit Withstand Voltage	2 kV
Lightning Impulse Withstand Voltage (Peak)	Phase-to-Phase, Phase-to-Ground	75 kV
	Across Open Contact	85 kV
Mechanical Life	Circuit Breaker	10000 cycles
	Disconnect Switch (Manual)	3000 cycles

Cover-Type FTU Feeder Terminal

Parameter Name	Parameter	Remarks
Power Source	DC24V
Communication Power Supply	DC24V/DC48V
Communication Channels	No less than 3 communication channels.
Telemetry	Collects 2 line voltages, three-phase protection/measurement current, zero-sequence current, zero-sequence voltage
Output Circuits	2 remote control open/close circuits
Communication Interfaces	1 Bluetooth interface; 1 hot-swappable 4G/5G module interface; 2 RS232 communication interfaces, 2 Ethernet communication interfaces; 1 serial maintenance port;
Metering Function	Built-in line loss metering
Protection Functions	Three-stage overcurrent protection, two-stage zero-sequence current protection, short-circuit fault alarm, small current grounding line selection, three-shot auto-reclosing, non-breaking current blocking, undervoltage alarm, zero-sequence overvoltage alarm, PT disconnection alarm, post-acceleration protection
Time Synchronization	GPS/Beidou time synchronization
Connection Type	Circular aviation connector (6-pin PT, 6-pin anti-open circuit current, 14-pin digital input/output)	Connected to the 26-pin aviation connector of the pole-mounted switch
Backup Power Supply	Rated voltage DC24V, single battery capacity ≥7Ah, service life ≥3 years, capable of completing "open-close-open" operation and maintaining operation of the distribution terminal and communication module for at least 4 hours.	Optional 12Ah or other capacities based on customer requirements
IP Rating	IP65

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