Poznámky redaktora
c A
TT with neutral A
TT without neutral n. rin irc it-b ope and ly
is .2.7. positive
result shown the circuit-breaker opening.
A
A
The axim length the PR120/V iring ust not exceed meters.
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.3.
Use VTs ith shield, connected earth (see standard par.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.3.1 Current sensor connection for external neutral
A
If you rre xte tra irc it-b r,
rem InN.
Pay particular attention the types cable, the connections earth and the recom ended axim distances. and/or disconnected essages ust appear; they
do, not close the circuit-breaker ediately and make the correct connections.
Then test can conducted the whole chain, again using the specific function (Trip test).3.
Auto Test
Trip Test (disabled)
CBopen
Model 2234 Apparatus Scale
L2778
Doc. positive result shown the display.1.
Check the open closed state the circuit-breaker the same "PR123/P Test" screen, checking that
the closed and de-energized.2).1.To run Trip Test, press the Test" button and the "Enter"
button simultaneously.
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.14. 2
Page No.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.
14.3.4 Test
Before putting into service, test can conducted means the specific "Auto test" function which
can activated the PR123/P.
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. No.
- for and systems with neutral, the connection must made N.3 Putting into service
14. 11.2). 15.
14.
The shield ust connected earth both sides.
94/158
1/6
CB status
.
The following summary table standard connections according the type plant. customer considers this value too
high has residual current protection which risks being tripped, then application diagram must used.2 connections
A ielectric strength tests are not allowed the inputs and outputs the releases the secondary lines any
c VTs.3. With enabled, the Voltage Transformer Inpresent data will set and VT's phase-to-phase primary
and secondary voltage properly adjusted.
Use corded shielded o-w ire cable (see note par.
14. 14.3.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.
VT Standard: Single standard transformers, see par.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
