10kv line installation watchdog vacuum switch zw32-12
2021-03-16 06:20:39
10kv line installation watchdog vacuum switch zw32-12-Shaanxi Taikai High Voltage Switch Manufacturing Co., Ltd. If you install a user boundary switch (commonly known as a watchdog) at the T junction or user terminal (responsibility boundary point), confirm the user after judgment If a fault occurs in the boundary (overcurrent, short circuit, single-phase grounding, etc.), the fault is automatically isolated, which can ensure that users in the non-fault area use electricity normally.
Area of ​​development
Distribution network automation was proposed in the 1990s. After years of development, related technologies have initially matured and are increasingly used in power grid systems. Distribution network automation technology is a new technology that uses modern scientific technology to integrate communication technology, electronic technology and computer information technology with electrical equipment, and to build a corresponding automation system based on this. The application of distribution network automation technology to the actual power grid operation can ensure the reliability of the power grid power supply system and improve the user's power quality and experience satisfaction.
Model overview
use
The ZW20-12 outdoor user boundary vacuum circuit breaker is an ideal device for solving the above-mentioned accidents. The zero-sequence current transformer is built in the outlet side of the device, which is used in conjunction with the boundary controller. It is installed at the T junction of the 10kV overhead distribution line or the user terminal, which can automatically cut off the single-phase ground fault and automatically isolate the interphase short-circuit fault. Ensure the safety of electricity for non-faulty users. It is suitable for use in substations, industrial and mining enterprises, and rural power grid distribution systems for protection and control and frequent operation sites.
Control and protection device
In order to obtain excellent protection performance, the product uses FDR-02 type controller. The user can set the parameters of the controller and perform the opening and closing operations on the spot, or use the handheld computer to set the parameters of the controller, check the protection settings, perform the opening and closing operations and check various event records, or by specifying Mobile phones replace PDAs with text messages. In addition, you can use a simple wireless remote control to open and close the circuit breaker.
The composition of the control and protection system of BSZW20A-12F / T630-16 outdoor AC high-voltage boundary circuit breaker is shown in Figure 7. Among them, the power management background machine is a user-supplied device. Even if it does not, it will not affect the use of the boundary breaker.
The effective control radius of the simple wireless remote control is 100 meters, and it can only open and close the circuit breaker. The simple wireless remote control is divided into two types: special type and general type. The dedicated simple wireless remote controller and the controller are one-to-one, and its advantage is that it will not cause the other boundary circuit breakers to be mistakenly divided and mismatched when operating one boundary circuit breaker.
However, the large number of boundary circuit breakers brings trouble to the storage of the remote controller. The universal simple wireless remote controller can operate all the boundary circuit breakers with only one. However, if multiple boundary circuit breakers are installed relatively close, other boundary circuit breakers are prone to misdivision and misoperation during operation. This is its shortcoming. Users should fully consider and choose the appropriate simple wireless remote control. Figure 7 is a physical diagram of the composition of the control and protection system. It can be seen from Figure 7 that the interface between the human and the FRD-02 controller can be used as a text message on a handheld computer or mobile phone.
These two methods have their own merits. The advantage of the handheld computer mode is that it can be easily interfaced with the controller, but its effective service radius is 100 meters. Using mobile phone SMS and the controller interface, as long as the communication signal between the boundary breaker and the personnel is good, there is no limit to the distance, but The communication signal at the installation site of the boundary circuit breaker must be good. And the mobile phone short message service needs to pay. The user must choose one of the interface modes after considering it comprehensively.
Installation diagram:
Installation check
In order to ensure the safe and reliable operation of the circuit breaker, it must be checked before entering the installation. First, after the packaging is removed, first check the appearance of the circuit breaker, such as whether the insulation protection layer on the conductive rod is intact, whether there are cracks and other defects, the surface of the case, whether it is damaged due to transportation reasons, and whether the number of nameplates meets the order requirements. Secondly check whether the attachments, spare parts and documents are complete. After that, manually try 5 to 10 times to check the operating performance of the circuit breaker operating mechanism. Afterwards, 42kV / min power frequency withstand voltage test is conducted between the same pole break of the main circuit of the circuit breaker, between phases and relative ground and the control part.
Matters that users clearly specify when ordering
1. Product model, name, parameters and communication method;
2. Transformer transformation ratio and accuracy level;
3. Quantity and delivery time;
4. Name and quantity of spare parts and spare parts;
5. Other special operating requirements, such as contacts and accessories.
6. Product certificate (including PT, CT, zero sequence transformer)
7. Installation and operating instructions;
8. Packing list;
9. Schematic diagram of product secondary wiring.
10kv line installation watchdog vacuum switch zw32-12-Shaanxi Taikai High Voltage Switch Manufacturing Co., Ltd.
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