Dranetz Visa Uživatelská příručka stáhnout pdf (Strana 240)

E-16

Connecting to a Potential Transformer

Procedure

Follow these steps to connect voltage probes to a potential transformer.

Scale factor

The scale factor of the PT must be accounted for in making accurate voltage

measurements. Because the monitored output voltage of the PT is stepped-down

(divided) from the original voltage, this ratio must be stepped-up (multiplied) by the

PowerVisa when voltage computations are performed. The PT scale factor is usually

mounted on the PT assembly and is entered into the PowerVisa on the scale factors

screen (refer to page 5-10). Refer to the PT manufacturer’s literature for the scale factor

for the device you are using.

Step Action

1 Turn off power to the PT.

2 Connect the colored voltage probes to the channel inputs on the

PowerVisa top panel.

3 Connect the colored voltage probes to the PT’s connections in

accordance with the manufacturer’s instructions.

4 Turn on power to the PT.

1 2 ... 235 236 237 238 239 240 241 242 243 244 245 ... 273 274

Žádné komentáře

Dranetz Visa Uživatelská příručka Strana 240