Critical Power
Modifications reserved
Page 38/43
GE_UPS_ISG_LPS_3UL_20K_30K_2US_V010.docx
Installation Guide
LP33 Series 20 & 30 UL S2
5.3
EPO (EMERGENCY POWER OFF)
WARNING !
Connections described in this chapter shall be done only by a
TRAINED PERSON
or
SERVICE ENGINEERS
.
Fig. 5.3-1 Terminals X7 - EPO
An external Emergency switch (
NC
-
Normally Closed voltage-free contact) can
be connected on terminals
X7 / 1, 2
of the
P1 – Control board.
NOTE !
Check that the
Jumper JP5
is
not installed on the
P1 –
Control board
.
In a Parallel System a
separate NC
(Normally
Closed)
contact must be
connected individually to
each unit
.
When activated, this switch causes the immediate shut-down of
booster
,
battery-charger
,
inverter
; and
the
contactors K4, K6
and
K7
.
NOTE !
This procedure could imply a load shut-down.
When the
EPO
has been activated, the system must be restored as follows:
Press the push-button
EPO
(contact on
X7 / 1, 2
is closed again).
Press the key
“
O
”
(
Inverter OFF
– see
Section 6.2 of User Manual
) on the
control panel
.
Press the key
“
I
”
(
Inverter ON
– see
Section 6.2 User Manual
) on the
control panel
.
In case of a Parallel System press the key “O” (Inverter OFF) on the control panel of
each unit connected on the parallel bus and having its output switch Q1 closed.
1
2
P1 - Control board
JP5
X7
LPS33U_0
20-030_S2
_UPS-X7-J
P5_01
