Technical description
2 Protection functions
2.12 Programmable stages (99)
VM55.EN005
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Table 2.12-1Available signals to be supervised by the
programmable stages
U12, U23, U31
Line-to-line voltages
UL1, UL2, UL3
Phase-to-ground voltages
Uo
Zero-sequence voltage
f
Frequency
THDUa
Total harmonic distortion of input U
a
THDUb
Total harmonic distortion of input U
b
THDUc
Total harmonic distortion of input U
c
fy
Frequency behind circuit breaker
U12y
Voltage behind circuit breaker
U12z
Voltage behind 2
nd
circuit breaker
ULLmin,
ULLmax
Minimum and maximum of line voltages
ULNmin,
ULNmax
Minimum and maximum of phase
voltages
Eight independent stages
The device has eight independent programmable stages. Each
programmable stage can be enabled or disabled to fit the
intended application.
Setting groups
There are two settings groups available. Switching between
setting groups can be controlled by digital inputs, virtual
inputs (communication, logic) and manually.
There are two identical stages available with independent
setting parameters.
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