MGE UPS Systems STS 600A - Manual (Page 26)

1.7.4 Accessing Electrical Connections
CAUTION: Only an authorized electrical professional should access electrical con-
nections. A severe shock hazard exists.
The ONLY user serviceable items in the Epsilon STS™ unit are:
A. The input power connections
B. The load connection
C. Any wire connections to the customer control terminal block.
D. The communication card options
The access method for connections made to the communication cards is clearly seen when the front door to the
Epsilon STS™ unit is opened. Figure 1-5 and 1-6 show the panduit wire-ways used to thread wire through the
conduit plates (top or bottom entry).
However, access to the input and load power connections is made through
the removal of the safety panel located in the upper left of the Epsilon STS™ front (with the door open). This safety
panel is removed by first removing the screws securing the panel. It can then be removed by lifting the safety panel
away from the unit.
Figure 1-5: 200A STS Power and Control Wire Connections.
Table 1-1: Input/Output Power Connections.
# OF CABLES PER MINIMUM CABLE LUG CONDUIT
CABLE SIZE (SUPPLIED) HOLE
PHASE N GND (75°C, CU) DIA. (QTY.)
1 2 1 # 4/0 AWG # 4/0, 3/8” STUD 2-1/2” (3)
(T&B L973 OR EQUIV.)
Epilson STS TM
Introduction 1 — 10 86-504004-00 B03
COMMUNICATION
CARDS
TB1
TERMINAL
CONTROL WIRES
THREADED THROUGH
PANDUIT/WIRE-WAYS
TOP ENTRY
CONDUIT PLATE
CONTROL
WIRES
BRACE AT
12" INTERVALS
BOTTOM ENTRY
CONDUIT PLATE
CONTROL WIRE
PANDUIT/WIRE-WAYS