User Manual Liebert Hipulse E Chapter 9 - Operating Instructions
Single or '1+N' UPS System Procedure
(07/04) Page 9-1
9 Chapter 9 - Operating Instructions
9.1 Introduction
The UPS can be considered to be in one of following 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.
• On Static Bypass - The load power is supplied though the mains static bypass line. This may be considered as
an intermediate operating condition being utilized for the purpose of load transfers between inverter and
maintenance bypass or supply under abnormal operating conditions.
• ECOMODE – All relevant power supply switches and the battery switch are on, and the load is fed by the
Bypass Mains through the UPS Static Transfer Switch, while the Inverter remains on stand-by.
This chapter contains instructions which enable you to switch between the above conditions, to carry out a RESET and
how to switch ON\OFF the inverter, etc.
9.1.1 General notes
Note 1: All the user controls and indicators (led) mentioned in these procedures are identified in Chapter 8.
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 Liebert Hipulse E UPS System 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.
9.1.2 Power Switches
The UPS can be separated by means of power switches, mounted inside the cabinet and accessible after opening the
front door, which has a key.
The location of the UPS power switches is shown in Figure 9-1.
The UPS module power switches are:
Q1 - Input Isolator: connects the UPS with the mains supply.
Q2 - Bypass Isolator: connects the UPS with the bypass supply.
Q3 – Maintenance Bypass Isolator (padlocked) permits supply of the load directly by the bypass line for maintenance
of the UPS module.
The internal maintenance bypass must not be used when the UPS system is comprised of more than two UPS modules
in parallel.
Q4 - Output Isolator: connects the output of the UPS to the load.
Note : The battery interrupter is not expected inside of the UPS and should be installed in the proximity of the
respective battery.
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