ABB UniGear Series, Engineering Manual

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UNIGEAR DIGITAL S ENS O RS
1VLG5 00007 E 7
2.1.2 Voltage sensors
Voltage measurement in the KEVA sensor is based on the resistive divider principle. Voltage
sensors are designed to be compact and shaped as support insulators. They can be installed
in the switchgear´s cable compartment or directly in the busbar compartment.
KEVA 17.5 B20
KEVA B sensor can be used in all applications up to the voltage level 17.5 kV. The sensor fulfils
requirements of accuracy class 0.5 for measurement purposes and accuracy class 3P for
protection purposes.
Figure 5: Voltage sensor KEVA 17.5 B20
Technical parameters
– Rated primary voltage 15 /  3 kV
– Rated power frequency withstand voltage 38 (42) kV
– Rated lightning impulse withstand voltage 95 kV
– Transformation ratio 10 000: 1
– Accuracy class 0.5 / 3P