MITSUBISHI | 9700 SERIES UPS | Page Number: |
ELECTRIC | OWNERS / TECHNICAL MANUAL |
1.2Overview
The UPS provides two power paths between the utility source and the critical load as shown in figures 1.1 and 1.2.
A) Through the UPS Module (FIGURE 1.1)
FIGURE 1.1 Single Line Diagram - Normal Operation
CB |
|
| Static Transfer |
AC Bypass |
|
| |
Input |
|
| Switch |
Use supplied | CB3 |
|
|
MCCB | CONVERTER | INVERTER |
|
| 52S | ||
AC input |
|
| Output |
|
|
| |
CB1 |
|
| 52C |
|
| CB2 | Power Flow |
|
|
| Not in Use |
Battery cabinet |
| UPS Module | |
When the load is on the Inverter, the internal control system determines which of the two paths supplies power to the load. During normal operation, the path through the UPS module is used.
Input AC power flows through the UPS where it is converted to DC by the Converter / Charger. This DC power is utilized to charge the UPS battery and to provide power to the Inverter. The Inverter converts the DC power to clean AC power to supply the critical load.
The conversion - inversion process eliminates any voltage transients or fluctuations existing in the input power before it reaches the critical load.
*The Bypass Input circuit breaker (MCCB) for protection of the UPS and cables is field supplied and field installed. (See WARNING 2 on page iv)
MITSUBISHI ELECTRIC 9700 SERIES UPS
