Zw8-12f Vacuum Circuit Breaker (with watchdog)

Summary:
ZW8-12/F Intelligent Outdoor High Voltage Vacuum Circuit Breaker (hereinafter referred to as Intelligent Circuit Breaker) is used in three-phase power system with 50 Hz AC and 10-12 kV voltage. It is used for breaking and closing load current. It has overload and short-circuit protection function, quick-break protection function, time-delay protection function, automatic reclosing function, and also has the function of overload and short-circuit protection. Arrester or disconnector can be installed according to user's needs (i.e. combination of circuit breaker and disconnector, hereinafter referred to as "combination intelligent circuit breaker"). The intelligent circuit breaker has its own power supply, which can be operated by remote control near the circuit breaker. It has CT and PT interfaces, which can meet the requirements of telemetry.

Main uses:
ZW8-12F series outdoor high-voltage vacuum circuit breakers (hereinafter referred to as "circuit breakers") are used in three-phase power systems with 50 Hz AC and 12 kV rated voltage. They are used for split-load current, combined-load current, overload current and short-circuit current. The configurable reclosure controller of circuit breaker can identify current characteristics and isolate multiple automatic reclosures or permanent faults; self-contained PT is used as power source to become an intelligent circuit breaker with voltage and current signal output and control; power supply is provided by electronic PT and three-stage composite protection of over-current delay, inrush delay and short-circuit fast break can be achieved. Protect.

Characteristic:
The combination of circuit breakers and disconnectors can form a "combined circuit breaker" with obvious breaks (hereinafter referred to as "combined circuit breaker"). Silicone rubber insulating sheath is available for users to choose from on disconnector. The sheath has the characteristics of rain, snow, sand, pollution and corrosion resistance, and can effectively avoid the freezing and oxidation of disconnector.

Circuit breakers can be equipped with lightning arresters, which can be installed on either side of the line of entry or exit according to user's requirements.

The circuit breaker can be equipped with inrush current controller, which has the function of avoiding inrush current and overcurrent speed breaking.

Circuit breakers can be equipped with 2 to 3 measuring or measuring transformers.
Main technical parameters:
Composition:
1) The whole structure is three-phase common box type.
2) Vacuum interrupter
3) Spring Operating Mechanism
4) Insulation System
5) Conductive circuit
6) Cover and body of box
7) Seals
Installation Dimension Diagram:

Use of environmental conditions:
Ambient temperature: upper limit + 40 t lower limit - 30. C
Elevation: 1000M
Wind pressure: <700 Pa (equivalent wind speed 34m/s)
Air pollution: Grade III
No frequent violent vibration
Characteristic:
1) According to user's needs, 50/5, 100/5, 200/5, 400/5, 630/5 current transformers can be installed with external insulation using high voltage silicone rubber bushing as internal insulation for composite insulation.
2) Built-in multi-tap current transformer can be used as overcurrent protection
3) Double-winding current transformer can be used for protection and measurement.
4) If voltage transformers, automatic reclosure controllers and automatic subsection controllers are installed, the distribution protection automation and "four telemetry" (telemetry, telesignaling, remote control and remote adjustment) functions can be realized. Compound controllers are installed (eliminating 


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