Single Line Diagram - MGE UPS Systems Epsilon STS 200A Installation And User Manual

1.6

Single Line Diagram

During normal operation, CB1, 2, 3A and 3B (if installed) are closed and the load receives power from the
designated preferred source through either SW1 or SW2 SCR switch. In the event of a preferred source failure, the
STS will transfer the load to the alternate source in a fraction of a cycle. If bypassed by closing either CB4 or CB5
bypass switch, CB1, 2, 3A and 3B (if installed) are opened, isolating the static switch section for maintenance.
Figure 1-4: Single Line Diagram, Epsilon STS
A
B
SOURCE
C
#1
N
G
A
B
SOURCE
C
#2
N
G
86-504004-00 B03
with Options.
TM
CB4
SOURCE
S1
INPUT
CB1
A
B
C FUSE
AC-DC PS 1
AC-DC PS 2
AC-DC PS 3
SOURCE
S2
INPUT
CB2
FUSE
A
B
C
CB5
N
G
COMMUNICATIONS
OPTION OPTION
RELAY JBUS/MODBUS
CARD CARD
CARD CARD
(SEE SECT. 2.5.3) (SEE SECT. 2.5.4)
(SEE SECTION 2.5.2.1)
SW1
CB3A
TVSS 1
(OPTION)
CONTROLS
CB3B
(OPTION)
TVSS 2
SW2
(OPTION)
TB1
1 2 3 4
EPO SOURCE LOSS TEST
(SEE SECTION 2.5.2.2)
Introduction
Installation and User Manual
OUTPUT
A A
B
B
C C
CRITICAL
N
G
CB CONTROL
EPO PS
EPO
SHUNT TRIPS
BYPASS LEDs
STS CABINET
TO
LOAD
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