Figure 39: Single Line Diagram; Figure 40: Example Of Setting Values For Voltage Sensor In Pcm600 - ABB UniGear Series Engineering Manual

Other parameters
The voltage sensor is based on the resistive divider principle. Therefore, the voltage is linear
throughout the whole measuring range. The output signal is a voltage, directly proportional
to the primary voltage. For the voltage sensor all parameters are readable directly from its
rating plate and conversions are not needed.
In this example the system phase-to-phase voltage rating is 10 kV.

Figure 39: Single line diagram

Primary voltage
parameter is set to 10 kV. For protection relays with sensor measurement
Voltage input type
support the is always set to "CVD sensor" and it cannot be changed. The
VT connection
same applies for the parameter which is always set to "WYE" type. The divi-
Division ratio
sion ratio is 10 000: 1. Thus, the parameter is set to "10 000". The primary
voltage is proportionally divided by this division ratio.

Figure 40: Example of setting values for Voltage sensor in PCM600

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