How to select the KYN28A-12 high voltage switchgear?

High voltage switchgear is mainly divided into two types: fixed type and handcart type. In terms of structure, it is divided into open type, semi-closed type and closed type. As far as the use environment is concerned, there are indoor and outdoor points.

How to choose KYN28A-12 high voltage switchgear correctly?

1. When choosing KYN28A-12 high-voltage switchgear, it is necessary to decide whether to choose the user's internal or outdoor type according to the use environment. According to the number of switchgear and the reliability requirements, determine whether to use a fixed or handcart type switchgear. The fixed switch cabinet is cheaper, but it is not as flexible as the handcart type. For substations that do not require high reliability and have a small number of switch counters, try to use fixed switch cabinets to reduce investment.

2. To determine the primary plan of the switch cabinet based on the high wiring design, the primary plan of the KYN28A-12 switch cabinet can be found in the relevant electrical manual. Combining the requirements of control, metering, protection, signal, etc., select or design the secondary wiring by yourself. After the switch cabinet is selected, the main components in the cabinet should be verified according to the conditions of use (altitude, ambient temperature, relative temperature, sunshine, wind speed, daily temperature difference, etc.) and short circuit conditions.

3. When selecting the operating mechanism, it should be determined in accordance with the operating power supply of the substation. Where there is a DC operating power supply (silicon rectifier, storage battery, etc.), try to use electromagnetic operating mechanism. It is relatively simple to adopt manual operation mechanism in small substation, but the cut-off flow of KYN28A-12 switchgear is much weaker.

The information that should be provided to the manufacturer when ordering KYN28A-12 high-voltage switchgear generally includes:

1. KYN28A-12 high voltage switch cabinet model, primary circuit number, secondary wiring diagram of substation, and operating mechanism;

2. Layout plan;

3. The secondary wiring diagram and terminal diagram of KYN28A-12 high-voltage switchgear; if the centralized plan of secondary wiring standard diagram is selected, the plan number and control circuit voltage should be indicated;

4. When ordering, indicate whether you need variable equipment in the cabinet, and indicate the transformation ratio of the current transformer;

5. If you need to use non-standard primary and secondary circuit plans or entrust the manufacturer to design, you can negotiate with the manufacturer.