Does anyone know the top ten manufacturers of Xi'an high-voltage vacuum circuit breakers?
2021-03-21 06:21:26
Does anyone know the top ten manufacturers of Xi'an high-voltage vacuum circuit breakers? Shaanxi Taikai High Voltage Switch Manufacturing Co., Ltd. ZW32-12 series outdoor AC high voltage vacuum circuit breaker (hereinafter referred to as "circuit breaker") is a three-phase AC 50Hz outdoor high voltage switchgear,
It is mainly used in the 10kV outdoor power distribution system of rural power grid and urban power grid, and is used for dividing and closing load current, overload current and short circuit current;
It can also be used in other similar places. ZW32-12 series outdoor AC high-voltage vacuum circuit breaker conforms to the national GB 1984 "AC high voltage
Circuit Breaker "and the International Electrotechnical Commission IEC 60056" High Voltage AC Circuit Breaker "and other standards.
. Conditions of Use
3.1 Normal conditions of use
a) Ambient air temperature: -40 ℃ ～ + 40 ℃;
b) Altitude: no more than 2000m;
c) The surrounding air can be polluted by dust, smoke, corrosive gas, steam or salt mist;
d) The wind speed does not exceed 34m / s (equivalent to 700Pa on the surface of the cylinder);
e) Vibration or ground motion from the switchgear and control equipment can be ignored;
f) Pollution level: Grade III.
3.2 Special use conditions Circuit breakers can be used under normal use conditions other than those specified above, at this time the user's requirements should be negotiated with the manufacturer,
And get a consensus.
4.3 Main technical parameters of CTB spring operating mechanism
4.4 ZW32 outdoor vacuum circuit breaker with isolating switch, in addition to meeting the requirements of Table 1 and Table 2, the isolating switch part should also meet the requirements of Table 4
5. Circuit breaker structure characteristics
5.1 The circuit breaker adopts a three-phase pillar structure, which has stable and reliable breaking performance, no risk of combustion and explosion, no maintenance, small size and weight
Light and long service life.
5.2 The circuit breaker adopts a fully enclosed structure with good sealing performance, which helps to improve the moisture resistance and condensation resistance, and is especially suitable for severe cold or humid areas
use.
5.3 Three-phase pillars and current transformers are imported outdoor epoxy resin solid insulation, or adopting epoxy resin outsourcing organic silicone rubber solid
Insulation; with high and low temperature resistance, UV resistance, aging resistance and other characteristics.
5.4 The operating mechanism adopts a miniaturized spring operating mechanism, the energy storage motor has low power, and the opening and closing energy consumption is low; the mechanism transmission adopts direct-acting transmission mode,
The number of parts is small and the reliability is high. The operation mechanism is placed in a sealed mechanism box, which solves the problem of corrosion of the operation mechanism and improves the mechanism
reliability.
5.5 The opening and closing operation of the circuit breaker can be manual or electric operation and remote control operation. Can be matched with intelligent controller to realize automatic power distribution
It can also be combined with a reclosing controller to form an automatic recloser and a segmenter.
5.6 The circuit breaker can be equipped with two-phase or three-phase current transformers for over-current or short-circuit protection, and can also provide current
Set signal; according to user requirements can be installed with current transformer for measurement.
5.7 The circuit breaker can be equipped with a three-phase linkage disconnector. When the disconnector is in the open state, there is a visible break, and it is equipped with the circuit breaker body.
Anti-error interlocking device. When the circuit breaker is in the closing position, the isolating switch cannot be opened or closed; only the isolation knife is fully closed
The circuit breaker can only be operated when it is fully opened. Insulators for lightning arresters can be connected together for easy maintenance.
6. Operating principle
6.1 Action principle of manual mechanism Closing operation: first pull the energy storage handle to store energy, the applied torque changes from small to large, when the closing spring is in the middle instant, the closing spring is released
Dissipate energy, prompt the energy storage system to rotate counterclockwise and drive the arm to rotate, drive the drive shaft to close the circuit breaker, and at the same time open the arm to buckle
The half shaft is opened, so that the circuit breaker is in the closing state; when the mechanism is in the closing state, the cam is separated from the rotating sleeve, and the mechanism cannot be closed again.
Opening operation: after the circuit breaker is closed, the opening handle is pulled or the overcurrent coil is driven when the line current exceeds the set value of the anti-surge device,
The half shaft of the opening brake is rotated, the opening arm of the opening brake is unfastened, and the transmission rod is opened by the opening spring to open the circuit breaker.
6.2 Action principle of electric mechanism Energy storage operation: pull the energy storage handle, or the energy storage motor rotates, and the cam rotates under the drive of the transmission gear, and the closing spring is gradually pulled
Long, when the spring is over, the cam is no longer rotated by the positioning member, and the circuit breaker is in the state of closing; at the same time, the cam is disconnected from the transmission shaft
It can't store energy again.
Closing operation: After the energy storage is completed, pull the manual closing handle or apply voltage to the closing coil to make the closing half shaft rotate, and the closing arm will close
The closing half shaft is unbuckled, the closing spring releases energy, drives the drive shaft to close the circuit breaker, and the opening spring is stored in energy. Agency closing
Under the state, the energy storage operation is performed again, and the closing spring is elongated again. After the spring is over, the closing half shaft is caught by the interlocking device to avoid the machine
The structure is closed by mistake. In the state of closing the stored energy, the mechanism is in the state of reclosing, which can realize "O-0.3S-CO" one reclosing operation.
Opening operation: After the circuit breaker is closed, pull the opening handle or apply voltage to the opening coil or when the line current exceeds the setting of the anti-surge device
The overcurrent coil is driven at a fixed value, which causes the opening half shaft to rotate, the opening brake arm is tripped, and the transmission rod is driven by the opening spring to make the circuit breaker
Open.
Note: The overcurrent coil of the operating mechanism is a short-term working system, and it cannot be passed for a long time.
The electrical schematic diagram of the overcurrent protection and mechanism control of the circuit breaker is shown in Figure 3. (Note: Mainly based on the secondary wiring schematic diagram of the circuit breaker)
7. The shape and installation dimensions of the circuit breaker
8. Installation and maintenance
8.1 The operator should have a preliminary understanding of the product's performance, installation adjustments, and maintenance knowledge, and should record the problems in operation and notify if necessary
Manufacturer.
8.2 The product must be visually inspected before installation. Observe whether the insulating sleeve of the product is damaged, whether the opening and closing instructions and energy storage instructions
There is leakage phenomenon, whether the cabinet is deformed, etc. After the inspection is completed, the product should be installed on a column above 4m in height and used. With isolating switch
When installing the circuit breaker, the accuracy of the action of the mechanical interlocking device between the disconnector and the circuit breaker should be carefully checked.
8.3 Before putting the product into operation, carefully check whether the rated voltage and rated current of each operating element are consistent with the actual situation. Concurrent machine
The organization operates to check whether the various actions are correct.
8.4 The parameters of the circuit breaker have been adjusted during the factory inspection, and the user does not need to start the inspection; after the voltage test is performed as required, that is
Can be installed.
8.5 The circuit breaker can be installed with single pole or double pole. The circuit breaker should be installed on the special steel frame stably and firmly. Installation diagram
See Figure 19.
8.6 The product is regularly inspected to check whether the circuit breaker is operating normally. Circuit breaker with isolating switch, the isolating switch is checked annually
2 times, the content is to check whether the mechanical interlocking action between the isolating switch and the circuit breaker is normal, and inject some grease into the moving parts.
9. Transportation, acceptance and storage
9.1 During transportation and transportation, the whole unit must be packed in a closed packing box and fixed. During transportation, it must not be overturned or tilted, and anti-vibration measures must be taken. Overhang
When using the router body, the four lifting rings hooked on the box body shall not directly handle the epoxy insulation cylinder. When the overhanging circuit breaker is equipped with an isolating switch, the center of gravity is off
On the isolating switch side, it should be carried out slowly when lifting.
9.2 Acceptance After receiving the circuit breaker, the user should perform the following acceptance work:
1) Check whether the packaging is damaged;
2) Check whether the documents and accessories are complete against the product packing list;
3) Check whether the technical parameters and product certificate on the nameplate of the circuit breaker meet the order requirements.
9.3 Storage The circuit breaker should be stored in a dry, ventilated, moisture-proof, shock-proof and harmful gas-proof room. For long-term storage, the environment should be checked regularly for compliance.
Meet the requirements. Packing, unpacking and storage should be carried out in a dry room, and the products and various parts should be checked for completeness and conformity.
10. Common faults and troubleshooting methods
11. Random documents and spare parts
11.1 Product certificate;
11.2 Instruction manual of circuit breaker;
11.3 Factory inspection report;
11.4 Packing list;
11.5 Secondary wiring diagram;
11.6 Operating manual of operating mechanism;
11.7 Random spare parts.
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