Options/Accessories
6.4.3.5 Display of Measured Value
See Display of Measured Value in the APC Silcon User Guide.
Time reading and utility 2 current not visible from remote display.
6.4.3.6 Alarms
See Alarms section in the APC Silcon User Guide.
6.5Isolation Transformer Module
CAUTION!
Use only one type of isolation transformers for dual utility input.
Isolation transformer modules can be used in the following configurations:
1.Between utility supply and UPS input, in a
2.Between utility supply and UPS input for galvanic isolation
3.Between UPS output and load for galvanic isolation
4.Between UPS output and load for voltage stepping from 480V - 208V/Y 120V required
Do not use switch gear to bypass isolation transformers. If bypassed, damaging circulation currents may occur, even with a unity turn ratio.
Coupling Methods
Configuration of isolation transformers is as
NOTICE!
Check correct phase connection of inputs and outputs.
CAUTION!
At 100% switch mode load, the neutral must be rated for 173% output phase current.
Recommended use:
•3 wires in/out
•3 wires in/4 wires out
•4 wires in/out
NOTICE!
All external cable dimensions are recommeded sizes only. Refer to local regulations.
6.5.1 Requirements on Site
All isolation transformer parts are accessible from front or top (cable entries accessible from bottom). Isolation transformer may be placed close to walls, allowing free space for the front door to open. Allow free space for ventilation slots for sufficient cooling.
Do not expose isolation transformers to direct sunlight.
Installation Guide APC Silcon | 69 |
