7200 Series UPS User Manual Chapter 2 - Operating Instructions
Single Module and 1+1 Parallel System Introduction
document in response to "powersure ups"
Page 2-1
Issue 6
(03/98)
2. Chapter 2 - Operating Instructions
2.1 Introduction
The UPS can be considered to be in one of three operating conditions:
• Normal operation - All relevant power switches and circuit breakers closed, the load is
powered by the UPS.
• On Maintenance Bypass - UPS shut down but the load connected to the unprotected mains via
the Maintenance Bypass Supply line.
• Shutdown - All power switches and circuit breakers open - no load power.
This chapter contains instructions which enable you to switch between the three above conditions, to
carry out a RESET after a fault transfer and how to switch OFF the inverter.
2.1.1 General notes
Note 1: All the user controls and indicators mentioned in these procedures are identified in chapter
1. Some of the diagrams are repeated here to assist in understanding the procedures.
Note 2: The audible alarm may annunciate at various points in these procedures. It can be canceled
at any time by pressing the `Alarm Reset' push-button.
Note 3: The 7200 series UPS incorporates an optional automatic boost charge facility which can be
used in systems containing conventional flooded lead-acid batteries. If this type of battery is used in
your installation you may notice that the battery charger voltage may be greater than its nominal (432V
d.c. for 380V a.c.,
446V d.c. for 400V a.c. and 459V d.c. for a 415V a.c. system) when the mains supply
returns from a prolonged outage. This is the normal response of the boost charge facility: the charger
voltage should return to normal after a few hours.
To Next Page
