Time cut-outs are intended for management of current networks and for protection them from overload. Besides, with their help the mode of course of circuit current is regulated.
Instruction
1. Pay attention: only correctly picked up time cut-out is capable to protect you at dangerous load of electrical wiring and to work instantly in case of accident. Buy "automatic machine" of famous brands and only in specialized shops.
2. It is not necessary to use the time cut-out with visible defects of the body. You should not operate also "automatic machines" with the overestimated nominal indicators of operation. Choose the time cut-out according to parameters of electrical wiring and level of consumption of current.
3. Study technical data sheet of the time cut-out. Usually in it indicators of rated current, tension and operating conditions are specified. If you are going to buy "automatic machine" for connection of increased loads, calculate current. The time cut-out has to disconnect tension in case of short circuit.
4. There are three main characteristics of operation established on time cut-outs: - B (for residential buildings); - C (for residential buildings and also for protection of the chains used by the consumers possessing big starting current); - D (for consumers with very big starting current).
5. According to the established standards, protection in case of overload can be provided if: - the consumed current is less or is equal rated to current of "automatic machine" which has to be no more, than the maximum indicators of loading of chain or cable; - indicators of rated current of operation of "automatic machine" have to be 1.5 times less, than indicators of maximum safe load of chain or cable.
6. Define the maximum indicators of current which the electrical wiring, by means of the special online program (http://electromirbel.ru/vybor_sechenia) or for tables of regulations for electrical installation which can be found to the address can sustain: http://electromirbel.ru/vybor_avtomaticheskogo_v.