The Network 0

Only in this way ensures that even if damage to the network, such as failure of the phase wire or break in the neutral wire, the remains protective vdt action. To protect against possible damage to the supercurrent vdt should be connected in series with the circuit breaker or fuse. Before the vdt should be installed a circuit breaker, which is mainly in relation to the downstream machine (installed, for example, in residential electrical panel). Button "Test>> vdt availability can be checked with a test button. When you click artificially created by the leakage current and vdt should work.

Advised to check the efficiency of vdt during commissioning and at regular intervals – about every six months. Currently, the Russian market there are two fundamentally different categories of circuit breaker: 1. Electromechanical (independent of the network) .2. Electronic (network dependent). Consider the principle of operation of each of the categories. Electromechanical RCDs consists of several main components: – a current transformer (his goal to track the leakage current and pass it with a certain coefficient in the secondary winding) – sensitive magneto-electric element acts as a threshold element (at operation without external interference can not return to its original state) – relay (allows decoupling in the case triggered a magneto-electric element) This type of ust requires high-precision mechanics for sensitive magnetoelectric element. Currently, the electromechanical RCDs offer mostly foreign manufacturers. See more detailed opinions by reading what apmex offers on the topic.. The price is accordingly higher than in electronic.

Advantages: This type of ust work in case of leakage current regardless of voltage, ie ust guarantees 100% network outage and the protection of rights. E uzo in principle constructed by the same scheme and electro. The difference is that the location of sensitive magnetoelectric element is an element of comparison. To validate this scheme in the rcd is also a rectifier, and a signal amplifier, that work can interfere. The work of the rcd depends not only on the leakage current, but also from the mains supply, which causes a decrease in the protective functions of ust when the voltage drops in the network. Electronic RCDs can use only in those cases when catering apartments used stabilizer or ups.