Rittal Cabinet - Knowledge Q&A of High and Low Voltage Distribution Cabinet (21-30)

Create Date: 2024-8-30 12:03:23|Source: Rittal/Rittal

21. What does the workplace have to meet for high-voltage electrical appliances?

Answer: A. Rated voltage, B. Maximum working voltage, C. Rated current, D. Rated short-circuit interrupting current, E. Short-time withstand current and peak withstand current.

22. What are the basic requirements for a high-voltage circuit breaker?

Answer: A works reliably; B. Sufficient circuit breaking capacity C. Shortest possible cutting time, D. Simple structure and low price.

23. What is the purpose of the disconnector?

A: A. Isolate electrical equipment from a live grid, B. Change the mode of operation, C. Connect and disconnect small current circuits.

24. What is a busbar?

Answer: In the voltage distribution devices at all levels of power plants and substations, the wires connecting engines, transformers and various electrical appliances are called busbars.

25. What is the classification of busbars?

Answer: soft bus (mostly used in outdoor distribution rooms with high voltage) and hard bus (low voltage mutual internal and external power distribution devices).

26. What is the material of the busbar?

A: Copper busbar, aluminum busbar and steel busbar.

27. What is the significance of busbar coloring?

Answer: It can increase the radiation capacity, which is conducive to heat dissipation, and the allowable load current can be increased by 12-15% after coloring.

28. What are the main technical parameters of the fuse?

Answer: A. Rated voltage, B. Rated current, C. Breaking capacity, D. Melting characteristics, E. Overvoltage.

29. What are the main products of low-voltage power distribution equipment?

A: Low-voltage distribution panels, switch cabinets, switch boards, lighting boxes, power boxes and motor control centers.

30. What is peak load? What is trough load? What is Average Load?

A: Peak load refers to the maximum load that can occur on the grid and the user in a day. Peak load is the hourly average amount of electricity that the grid and consumers use at the least amount of electricity in a day. Average load refers to the average hourly electricity consumption of the grid and users over a defined period of time.
Rittal Cabinet - Knowledge Q&A of High and Low Voltage Distribution Cabinet (21-30)

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