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13
7. Installation
7.1 Breakers and Wiring Terminal Block
The input breaker, maintenance bypass breaker and output breaker are located at the front of the Switch Module of the UPS system. The battery
breaker and input/output wiring terminal blocks are at the rear of the Switch Module. To access the terminals from the back of the UPS, remove
the protective Plexiglas
®
panel cover. Wiring installation must be made from the top of the UPS cabinet using the two terminal conduit covers
provided. For connection details, refer to Figure 7.1 (large-frame terminal block shown).
Figure 7.1
Function Description
Output Block Connection to the supported load Includes R (L1), S (L2), T (L3) and Neutral terminals
Alternate Input Block (Input 2) AC input source connection Includes R (L1), S (L2), T (L3) and Neutral terminals
Main Input Block (Input 1) Primary AC input source connection Includes R (L1), S (L2), T (L3) and Neutral terminals
Grounding Terminal For UPS grounding Includes one grounding terminal
Battery Input Block For external battery connection Includes Positive (+), Negative (-) and Neutral (N) terminals
7.2 STS Module Installation
The STS Module and Switch Module are pre-installed in the frame. STS Module comprises:
• Control Circuit
• Power Circuit
• Communication Circuit (including SNMP and Serial [RS232])
• Internal Static Transfer Switch
• Breaker(s)
Power and Battery Modules can be added according to the user’s requirements. The tables on the following page indicate the maximum current
and cable configurations per assembly.
Note: Internal battery modules for Small- and Medium-Frame systems only.
OUTPUT INPUT2 INPUT1
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