DEESYS TOTAL PRODUCTS GUIDE
137
Checking Items for Installation
1. Fabricate relay mounting panel of a suitable size and fix it
on which GFR be installed. Then install ZCT on the circuits
being monitored.
① Install ZCT of adequatable for the load (For selection of
ZCT specification and current rating. use ZCT
manufactured by us for ELD.)
② Ensuring GFR is in stalled at 10cm or more distance
where there are large current bus and strong magnet
field.
③ Install GFR on load circuit of single phase and three
phase power without exception.
④ check confinuity between GFR and ZCT by pressing
self-test button of each circuit line. The receiver is in
nomal status if ground fault current level indicator shows
a value in numerals Below of 18 if the connection of GFR
and ZCT is correctly made, and a value of 18 if they are
disconnected.
2. Connections to terminals on the back of GFR.(Refer to
external wiring diagram)
① One of two ZCT terminals(no ploarities) Shal be
connected to relay terminal of each circuit ①, ②, ③, ④,
⑤, ⑥, ⑦, ⑧, ⑨ and ⑩ and the other terminal to common
terminal ⓩ of GFR.
Checking Items Before Installation
Check up following points befor installation in order to ensure
satisfactory performance of GFR.
1. Connect AC220V power lines to terminals Po and P1 of GFR.
※Note : Operating power is set to AC 220V at factory when
delivered.
If AC 110V is used, slide the power voltage selector switch to
AC 110V position.
2. When the power os connected, power lamp(Green LED)
turns on to indicate power suppy.
3. Check up digital displays by pressing circuit test switch.
The circuit number on display changes by advancing one
circuit at each of pressing the button and ground fault
current level indicator will remain displaying all the
while of testing.
After an elapse of about 25 seconds or so without pressing
test button further, the indication will disappear automatically.
4. Check up operating time settings of each circuit by pressing
operating time check switch.
5. Check up fault sensing current setting by pressing ground
fault sensing setting switch.
6. Check up internal circuits by pressing self- test button of
each circuit.
If the button is pressed of a circuit, relay of the circuit and
ground fault indicator lamp(RED LED) and circuit indicator
relay activate to show status of circuits.(The value of digital
display represent assumed state of grounding fault).
7. Carry out the test of item 6 after auto/manual switch is set
mannual position.
8. Return to the initial status by pressing the reset switch after
finishing the above test.
② With GFR, terminals ⓐ through ⓙ are ‘a’ contacts for
external relays, and terminal COM is ‘contact’ for
external
relays.
The terminals could be used for control of circuit
breakers, external alarm buzzer, and leakage fault in
dication on central control board.
③ Terminals Ta and Tc are provided to use the contacts for
external indicators(buzzer, lamp).
④ Terminal (E) is for grounding which is connedted to the
ground terminal of distribution board. (Refer to external
wiring diagram for connections).
⑤ The control power of relay should be connected an
independent sonrce which is not distributed from main
source.
999
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