itpart Samit from leaking to the ground voltage performance of PB 3(6) kV

Purpose and scope.

The device is intended to implement, in conjunction with a high voltage cell protective disable the appearance of one-, two - or three-phase leakage the ground and continuous monitoring of insulation resistance in isolated cable networks in mines, hazardous gas and dust, reduce the risk the defeat of people by an electric current and the probability of explosions of mine gas fire isolation of electrical equipment and combustible materials, and also prevent premature ignition of electric detonators.
The devices are available in two versions.
Camera AZO-3 is designed for use in separate cable networks 3 kV supplied from a step-down explosion-proof transformers 6/3 kV, installed directly in mines.
Camera AZO-6 is designed for operation in separate cable networks 6 kV voltage supplied from intrinsically safe separation transformers 6/6 kV, installed directly in mines and also from General industrial dividing transformers 6/6 kV or separate transformer windings
35/6 - 6 kV, installed on the surface.

Function.

The device provides the following functions:
1. Continuous monitoring of insulation resistance of power circuits to the electrical load;
2. The command to disable the switching apparatus by reducing resistance earth leakage below the permissible values and appearance leakage current to ground;
3. Light alarm activation;
4. Check of serviceability of functioning;
5. Disabling the switching device when disconnecting disconnector or disappearance of operative voltage;
6. Preventive control of the insulation resistance of the network;
7. Visual inspection of insulation resistance.
8. Continuous self-test apparatus and circuits connecting the midpoint of the transformer.

Production : JSC"NPP"Makiivka plant of mine automatics"