FUNCTION CHARACTERISTICS
53
NVA100X-D - Manual - 02 - 2016
Polarity reversing
For each inputs of each phase current and residual current input, the polarity “NORMAL” or “RE-
VERSE” can be select.
With “NORMAL” selection the input polarity from this input is not inverted, with “REVERSE” selec-
tion the input polarity is reversed. This function allows you to correct any connection errors due to
reverse polarity.
—
polarity.ai
Proper connections -> none polarity correction required
Wrong connections -> polarity correction required
Wrong connections -> polarity correction required
side L CTs
side H CTs
Protected object
(Motor/Generator/
Transformer)
side H CTs
Polarity = NORMAL
Polarity = NORMAL
Polarity = NORMAL
Polarity = NORMAL
C1-C3-C5-C7 terminals
C2-C4-C6-C8 terminals
A1-A3-A5-A7 terminals
A2-A4-A6-A8 terminals
C1-C3-C5-C7 terminals
C2-C4-C6-C8 terminals
A1-A3-A5-A7 terminals
A2-A4-A6-A8 terminals
side L CTs
Phase current inputs side H
Polarity = INVERSE
Phase current inputs side L
Phase current inputs side H
Phase current inputs side L
NVA100X-D
NVA100X-D
TA lato H
Phase current inputs side H
Polarity = INVERSE
Phase current inputs side L
Protected object
(Motor/Generator/
Transformer)
Protected object
(Motor/Generator/
Transformer)
NVA100X-D
NO CORRECTION
REQUIRED
REQUIRED POLARITY
CORRECTION ON SIDE L
REQUIRED POLARITY
CORRECTION ON SIDE L
C1-C3-C5-C7 terminals
C2-C4-C6-C8 terminals
A1-A3-A5-A7 terminals
A2-A4-A6-A8 terminals
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