Poznámky redaktora
To run Trip Test, press the Test" button and the "Enter"
button simultaneously.3.
VT Standard: Single standard transformers, see par.
The following summary table standard connections according the type plant.
- for and systems with neutral, the connection must made N.2 connections
A ielectric strength tests are not allowed the inputs and outputs the releases the secondary lines any
c VTs. positive
result shown the circuit-breaker opening.
14.
Use corded shielded o-w ire cable (see note par. No. 11.3.
94/158
1/6
CB status
.3.4 Test
Before putting into service, test can conducted means the specific "Auto test" function which
can activated the PR123/P.2. With enabled, the Voltage Transformer Inpresent data will set and VT's phase-to-phase primary
and secondary voltage properly adjusted.
A pplication diagram pplication diagram B
N L3
f —
A1 bi
B1i «1
A2
B21
b2
^a2
A3
53^
b3
[ a3
it:::::::::
in i:::::::
H H
1>+ 1
14. customer considers this value too
high has residual current protection which risks being tripped, then application diagram must used.7.
Then test can conducted the whole chain, again using the specific function (Trip test). positive result shown the display.1 Current sensor connection for external neutral
A
If you rre xte tra irc it-b r,
rem InN. rin irc it-b ope and ly
is .
The VTs should only used for voltages 690V; for lower voltages the presence the PR120/V module connected the lower
or higher busbars will sufficient.
The VTs must have performance coming between the values and 20VA inclusive, insulation between the primary and
Installation system
"VT Standard" type transform er
(Star/Star)
"VT Standard" type transform er
(Delta/Delta)
Application diagram Application diagram
TN-C A
TN-S A
IT with neutral A
IT n.2).
Pay particular attention the types cable, the connections earth and the recom ended axim distances.3 Putting into service
14.3.3 and connection test
A
If the PR123/P was installed the user, portant, before closing the CB, check the last line the display when the
relay turned for the first tim via PR030/B battery unit.
14.c A
TT with neutral A
TT without neutral n.
A
A
The axim length the PR120/V iring ust not exceed meters.
14.
Use VTs ith shield, connected earth (see standard par.3. 15.3. and/or disconnected essages ust appear; they
do, not close the circuit-breaker ediately and make the correct connections.
Check the open closed state the circuit-breaker the same "PR123/P Test" screen, checking that
the closed and de-energized. 14.14.1.1.c A
Note for diagram:- for TN-C systems the connection must made PEN;
- for TN-S systems the connection must made for configurations with neutral for configurations without
neutral; the used, the current thereon could around dozen mA.
Auto Test
Trip Test (disabled)
CBopen
Model 2234 Apparatus Scale
L2778
Doc.This ill enable satisfy all the international reference standards and guarantee perfect operation of
the relay even under severe environm ental and electrom agnetic conditions.
The shield ust connected earth both sides.1 ction s
A
For the connections provided the user, recom ended that you com ply strictly ith the recom endations contained
in this docum ent. 2
Page No.2)
