Implementation of the system of control of electrical insulation characteristics

1. Purpose

1.1. УП500-VECTOR unit is designed for operational control of insulation inputs of transformer under operating voltage. Controlled parameters: current through the input and dielectric loss tangent.

1.2. Operating conditions of devices included in the set of УП500-VECTOR:

for connecting shunts:

- Ambient temperature (operating and limit values) - from -60 ° C to +40 ° C;

- Relative humidity - 100% at 25 ° C;

- Atmospheric pressure (725 ± 75) torr.

for УП500 instrument panel and "Vector-2.0M":

- Ambient temperature (operating and limit values) - from -10 ° C to +40 ° C;

- Relative humidity - 80% at 15 ° C;

- Atmospheric pressure (725 ± 75) torr.

1.3. Connecting shunts are vibration resistant when exposed by sinusoidal vibration at a frequency of 100 Hz during acceleration up to 10 m/s2.

2. Technical data

2.1. Features of connecting shunts:

- Current through input insulation from 5 to 100 mA;

- Insulation resistance of at least 2 MW.

2.2. Features of panel УП500:

- Separation transformer’s reference channel transformation ratio 6,06:1;

- Co = 100000 pF;

- There are grounders of connecting shunts and a switch of measured phases.

2.3. Device characteristics for "VECTOR-2.0M" are given in technical passport.

3. Structure of the device

УП500-VECTOR device:

- Connecting shunts in three pieces, mounted on the output PIN of each of the three controlled inputs;

- (Under load) transformer inputs insulation control panel (panel УП500), mounted on a substation control board;
 

- A measuring instrument of the insulation characteristics ("VECTOR-2.0M");

- Coaxial radiofrequency cable RG-58, laid in metal hose from the transformer inputs to the panel УП500, which connects outputs of connecting shunt and terminals of panel УП500;

- UTP-5 cable that connects the secondary circuits of voltage transformers connected to the controlled inputs and the corresponding terminals of panel УП500.