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Operating
Manual
SG Series
10, 20, 30 & 40 kVA
8.1.3 Programmable input free contacts
Some programmable UPS functions (indicated in
Section 4.1
), can be activated by closing an
external contact, if connected, on:
X1 / 10, 21 or
J2 / 10, 23
User Input 1 (default = Not used) (RL1)
X1 / 11, 22 or
J2 / 11, 24
User Input 2 (default = Emergency GEN ON) (RL2)
8.1.4 Gen Set Signaling (GEN ON)
If an emergency generator set supplies the UPS in case of
Utility Failure
and the generator is
particularly unstable in frequency, it should be suitable to install the signal
“Generator ON”
on
X1/11, 22
or
J2/11, 24
(this input is programmed as default for this function).
When this contact closes, it causes the change of certain functions (programmable) such as:
•
Enabling or disabling of synchronization and consequently the
Load
transfer to generator.
•
Reduction or elimination or delay of
Battery
recharging during the generator operation.
In a parallel system a separate NO (Normally Open) contact must be
connected individually to each unit.
8.1.5 AUX external Maintenance Bypass
If the UPS system is equipped with an external
Maintenance Bypass Switch
, it is possible to
connect a NO (normally open) voltage free aux. contact from the
External Bypass Switch
to
the programmable input
X1/10-21
or
J2/10-23
, making the UPS operate as if the internal
switch
Q2
has closed.
This function can be activated by changing a dedicated parameter (password required).
When this NO (Normally Open) contact closes, the output
Inverter Contactor
K7
it is
automatically opened and the
Load
transfer back to
Inverter
will be inhibited.
In a parallel system, the input on customer interface of each unit must
be connected to a separate AUX contact of the External Maintenance
Bypass Switch.
8.1.6 Auxiliary Power Supply (APS) 24 VDC / 1A
4
1
3
2
3
2
1
SGT
50
00_100-
150_C
us
to
m
er
in
te
rf
ac
e
24VD
C
_01
4
XA
Fig. 8.1.6-1 Terminals for connection 24 VDC
XA - 1
24
VDC
XA - 2
GND
XA - 3
24
VDC
XA - 4
GND
