Section 6 1MRK 505 350-UEN
Additional functions
52 Technical Manual
Distributed busbar protection REB500
Section 6 Additional functions
6.1 Voltage release
The voltage function is used to enable tripping or other functions as described
below. It forms part of a bay unit equipped with the corresponding VTs. The
internal output signal of the voltage function is an enabling signal.
An enabling logic (matrix) provides facility for assigning the
enabling (release) signal to the respective functions.
The enabling signal can be assigned to a feeder, a bus-tie breaker or
a protection zone. The assignment is performed by the ABB
engineering department and cannot be changed subsequently by
customers.
The dialog “Voltage release” enables the voltage function to be configured and set.
“Overview” lists the VTs, their assignment to bay units, any direct assignments to
protection zones and also whether they are active or inactive.
In the “Detailed view”, the voltage function can be activated and configured to
detect under- or overvoltage, and the operating voltage can be set.
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