Separate Input Utility (Option) - GE Digital Energy LP 33 Installation Manual

Digital Energy™
3.9.2

Separate input utility (option)

Fig. 3.9.2-1 Separate input utility (option)
ON
ON
OFF
OFF
Fig. 3.9.2-2 Power connections Separate Input Utility
For UPS correct operation, the input utility phase rotation must be clock-wise.
Neutral of rectifier input and neutral of bypass input must be coming from the
same input bar.
Inside the UPS, all neutrals N1 and N2 are connected together.
Connect wire to the Terminals using appropriate tools and appropriate torque.
Torque specification for Input / Output and DC power connections on Terminals: Section 3.8.1.
This UPS is designed to operate in a wye-configured electrical system with a
solidly grounded neutral.
If the UPS is equipped with an input transformer, the secondary of the
transformer must be wye-configured with neutral solidly grounded.
OPM_LPS_3UI_10K_20K_0US_V010.doc
Separate input utility
On request, the UPS can be delivered for
separate input utility.
Two independent lines (F2 and F3) supply
separately the rectifier and the bypass inputs
With this configuration, when the rectifier-input
fuses are opened, the automatic bypass and the
maintenance bypass are supplied by the other
line.
Rectifier input utility
L1-1 = Rectifier Phase A
L2-1 = Rectifier Phase B
L3-1 = Rectifier Phase C
X2
N1
LOAD
PE
Bypass input utility
L1-2 = Bypass Phase A
L2-2 = Bypass Phase B
X1
L3-2 = Bypass Phase C
(N1 = Neutral utility)
PE
Output load
L1
L2
L3
N2
PE
Max. rating X1 and X2
terminals: 4 AWG (25mm
Installation Guide LP 33 / 10 - 20 kVA
27/38
g
= Neutral utility
= Earth
= Earth
= Load phase A
= Load phase B
= Load phase C
= Neutral load
= Earth load
2
)