Add to Cart
ZW8 Series Automatic Vacuum Circuit Breaker AC High Voltage Three Phases Interrupter Circuit Breaker Switch
Product Description:
The ZW8-12 automatic vacuum circuit breaker is a specific type of
circuit breaker designed for outdoor use in high-voltage switchgear
systems. It is specifically suitable for three-phase AC outdoor
high-voltage switchgear with a rated voltage of 12kV and a rated
frequency of 50Hz.
The primary function of the ZW8-12 circuit breaker is to control
and protect the distribution systems in 10kV urban and rural power
grids. It is responsible for switching on or off load currents and
also for interrupting short-circuit fault currents that may occur
in the power system.
As a vacuum circuit breaker, it utilizes a vacuum interrupter to
extinguish the arc that forms when the circuit breaker opens during
switching operations. Vacuum interrupters provide reliable arc
interruption capabilities and are known for their high dielectric
strength and excellent electrical performance.
The ZW8-12 circuit breaker is considered to be one of the most
widely used, mature, and stable products in the power system. This
implies that it has a long history of successful operation,
extensive field deployment, and proven reliability. It has
undergone rigorous testing and meets the necessary industry
standards for performance and safety.
Feature:
1.The ZW8-12 automatic vacuum circuit breaker is designed with
anti-pollution ability. This means that it is capable of operating
reliably even in environments with high levels of pollution, such
as areas with heavy dust or industrial emissions. The internal
insulation is designed to withstand such pollution and maintain the
required insulation levels. Additionally, the circuit breaker
utilizes air and epoxy resin composite insulation, which provides
enhanced insulation properties and improves the overall performance
of the breaker.
2.The circuit breaker is equipped with a missile energy storage
operating mechanism. This operating mechanism stores mechanical
energy that can be released rapidly to open or close the circuit
breaker contacts. The missile energy storage mechanism is designed
for efficient and reliable operation, ensuring quick and effective
switching of the circuit breaker.
3.The ZW8-12 circuit breaker can be equipped with either a one-side
(left side) or two-side separation switch. This allows for
flexibility in the configuration and installation of the circuit
breaker in the switchgear system. Additionally, it can be equipped
with an external PT (Potential Transformer), which is used for
voltage measurement and control purposes. The external PT
facilitates accurate voltage monitoring and helps ensure the proper
functioning of the circuit breaker in the high-voltage system.
Advantages:
1.It is equipped with CT23 type spring energy-stored operating
mechanism. Energy-stored, opening and closing can be achieved by
motor or by manual.
2.ZW8-12G consists of ZW8-12 breaker and isolator, called combined
breaker, can be used as sectionalizer.
3.The structure of breaker is of three-phase assembled in a tank,
three-phase vacuum arc-extinguishing chamber enclosed in metal
tank, insulation material between phases and phase to each made of
SMC.
4.reliable performances, and high insulating strength.
Conditions:
1.Ambient temperature: The circuit breaker is designed to operate
within a temperature range of -15°C to +40°C. This means it can
function effectively in environments with temperatures as low as
-15°C and as high as +40°C.
2.Wind pressure: The circuit breaker can withstand wind pressures
of up to 700Pa, which is equivalent to a wind speed of 34m/s. This
ensures that the circuit breaker remains stable and unaffected by
strong winds.
3.Altitude: The circuit breaker is suitable for installation at
altitudes of up to 1000m above sea level. It is designed to operate
reliably within this altitude range.
4.Seismic intensity: The circuit breaker is designed to withstand
seismic activities with an intensity level of up to 8 on the
seismic intensity scale. This ensures that it remains operational
and unaffected by seismic vibrations up to this level.
Technical Parameter:
erial No. | Parameter | Unit | Data | ||||||||
1 | Rated voltage | kV | 12 | ||||||||
2 | Rated insulation level | 1min Industrial frequency withstanding voltage | Dry Test | 42 | |||||||
Wet Test | 34 | ||||||||||
Lightning surge withstand voltage (Peak) | 75 | ||||||||||
3 | Rated Current | A | 630 | ||||||||
4 | Rated short-circuit breaking current | kA | 20 | ||||||||
5 | Rated short-circuit breaking current times | time | 30 | ||||||||
6 | Rated short-circuit switching current (peak) | kA | 50 | ||||||||
7 | Rated peak withstanding current | 50 | |||||||||
8 | Rated short time withstand current | 20 | |||||||||
9 | Rated short-circuit duration | S | 4 | ||||||||
10 | Breaking time (Separate excitation decoupling) | Max. operating voltage | ms | 15-50 | |||||||
Rated operating voltage | 30-60 | ||||||||||
Min. operating voltage | |||||||||||
11 | Closing time | 25-50 | |||||||||
12 | Full disconnection time | ≤100 | |||||||||
13 | Arc burning time | ≤20 | |||||||||
14 | Mechanical lifetime | time | 10000 | ||||||||
15 | Closing function | J | 70 | ||||||||
16 | Rated input power of energy storage motor | W | <250 | ||||||||
17 | Rated operating voltage/ rated auxiliary circuit voltage | V | DC220 | ||||||||
AC220 | |||||||||||
18 | Energy storage time at rated voltage | S | <10 | ||||||||
19 | Overcurrent decoupler | Rated Current | A | 5 | |||||||
Accuracy of decoupling current | % | ±10 |