Emerson 7400M Series User manual

Series7400M UPS
USER MANUAL
Single Module
Parallel 1+N
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7400M
UNINTERRUPTIBLEPOWER SYSTEM
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7400M
UNINTERRUPTIBLEPOWER SYSTEM
Part No. : 500203072038 Revision : 01

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Dear Customer,
Please accept our thanks for giving us the privilege to serve you by choosing a Liebert
make ‘UPS’.
If this is your first Liebert UPS, we hope it is the beginning of a long relationship which
delivers value to your organisation. If you already own and use a Liebert UPS, we are
doubly honoured by your decision of continuing this relationship.
It is our constant endeavour to partner you for the growth and success of your business.
This philosophy is reflected in our Mission statement “To deliver value through Air &
Power Quality solutions to achieve customer delight”. Please do give us feedback to help
us realise our Mission.
Emerson Network Power (India) Pvt. Ltd.

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This manual contains information concerning the installation, operation and maintenance of the
Liebert Series 7400-M Uninterruptible Power System (UPS) for the Single Module and One plus One
Systems.
All relevant parts of the manual should be read prior to commencing installation.
The UPS must be commissioned by an engineer approved by the manufacturer (or his agent)
before being put into service. Failure to observe this condition will invalidate any implied
warranty.
The Series 7400-M UPS has been designed for Commercial / Industrial use only.
The Series 7400-M UPS has not been designed for direct use in any life support application.
If you encounter any problem with the procedures contained in this manual you should seek
immediate assistance from Emerson Network Power Sales Office from whom the equipment was
purchased. Alternatively contact the Emerson Network Power -Customer Service & Support
department at the address shown below:
Emerson Network Power (India) Pvt. Ltd.
Plot No. C-20, Road No. 19
Wagle Industrial Estate
Thane –400 604, INDIA
Phone : [phone]
25802388
Fax : [phone]
25828358
Emerson Network Power pursues a policy of continual product development and reserves the right to
change the equipment without notice.
@ Copyright 2002 by Emerson Network Power
Unauthorized reproduction prohibited
All rights reserved
IMPORTANT

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REGISTERED HEAD OFFICE
Emerson Network Power (India) Private Limited
PLOT NO. C-20, ROAD NO. 19
WAGLE INDUSTRIAL ESTATE
THANE –400 604 MAHARASHTRA, INDIA
TELEPHONE: [phone]
FAX: [phone]
*** WEST ZONE ***
Mumbai
Address: B-414, 424, Bhaveshwar Arcade, (opp. Shreyas cinema), LBS Road, Ghatkopar,
Mumbai 400 086
Tel: [phone]
Fax: [phone]
Pune
Address: B/6, Shree Dwarka Co-op. Soc., Hare Krishna Mandir Path, Model Colony, Off.
University Road, Pune 411 016
Tel: [phone]
Fax: [phone]
Baroda
Address: 39 / 2, Arunodaya Soc., Alkapuri, Baroda 390 005
Tel: [phone]
Fax: [phone]
Nagpur
Address: 203, Ganga Apts, 13, Giripeth, Nagpur 400 010
Tel: [phone]
Fax: [phone]
*** SOUTH ZONE ***
Bangalore
Address: No. 412, Jindal Center, 2nd Flr, 100 Fleet Road, Koramangalam, Opp.
Sukhsagar Hotel, Bangalore -95
Tel: [phone] / 5770 / 5870
Fax: [phone]
Chennai
Address: OMS Court, No. 1, Nathamuni Street, T., Nagar, Chennai 600 017
Tel: [phone]
Fax: [phone]
Kochin
Address: "Nedumparambil", No. 1419/36, Kattakara Road, Kaloor, Kochin 682 017
Tel: [phone]
Fax: [phone]
Secunderabad
Address: 1-1-40/1, 2nd floor, Vasavi Towers, S. D. Road, Secunderabad -500 003
Tel: [phone] / 5/ 6
Fax: [phone]

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*** EAST ZONE ***
Kolkatta
Address: Jindal Towers, 21/1A/3, Darga Road, Kolkata -700 017
Tel: [phone]
Fax: [phone]
Bhubaneshwar
Address: 69, Satya Nagar, Bhubaneshwar 751 007
Tel: [phone]
Fax: [phone]
Jamshedpur
Address: Kashi Kunji, Road No. 2, Ground Floor, Contractors Areas, Bistupur, Jamshedpur
831 001
Tel: [phone]
Fax: [phone]
*** NORTH ZONE ***
New Delhi
Address: 18/14, WEA, Pusa Lane, Karol Baug; New Delhi 110 005
Tel: [phone] / 18
Fax: [phone]
Chandigarh
Address: SCO No. 272, Sector 32 -C & D, 1st Floor, Above Punjab and Sind
Bank,Chandigarh.
Tel: [phone]
Fax: [phone]
Lucknow
Address: 213, 2nd Floor, Saran Chambers-II, 5, Park Road, Lucknow -226 001 (U.P)
Tel: [phone]
Fax: [phone]
Guwahati
Address : C/o. Ashok Bhasin, South Sarania, Ashram Road, (Near GMC Tax Office),
Ulubari, Guwahati -
781 007.
Tel: [phone]
Fax: [phone]
(Updated: December 1, 2004)

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Safety Procedure
WARNING
In a domestic environment, this product may cause radio interface in which case the user may be
required to take additional measures.
WARNING
HIGH EARTH LEAKAGE CURRENT: EARTH CONNECTIONS IS ESSENTIAL BEFORE CONNECTING THE
INPUT SUPPLY. This equipment must be earthed in accordance with local electrical codes.
WARNING
THIS UPS DOES NOT INCORPORATE AUTOMATIC BACKFEED PROTECTION. A WARNING LABEL MUST
BE FITTED TO ALL EXTERNAL PRIMARY POWER ISOLATIONS STATING.
INSULATE THE UNINTERRUPTIBLE POWER SYSTEM BEFORE WORKING ON THIS CIRCUIT.
GENERAL
As with other types of high power equipment, dangerous voltages are present within the UPS and battery
enclosure. The risk of contact with these is minimised as the live component parts are housed behind a
hinged, lockable door. Further internal safety screens make the equipment protected to IP20 standards.
No risk exists to any personnel when operating the equipment in the normal manner, following the
recommended operating procedures.
All equipment maintenance and servicing procedures involve internal access and should be carried out
only by trained personnel.
BATTERIES
Battery manufacturers supply details of the necessary precautions to be observed when working on, or in
the vicinity of a large bank of battery cells. These precautions should be followed implicitly at all times.
Particular attention should be paid to the recommendations concerning local environmental conditions
and the provision of protective clothing, first-aid and fire fighting facilities
TEST EQUIPMENT
When the battery is under charge, it is earth-referenced about its mid-point –e.g. if the battery is being
charged at 460V the battery extremities will be at +230V and –230V with respect to neutral (earth).
When using mains-powered test equipment such as oscilloscopes in the UPS voltage area, always use a
differential mode of operation to avoid the need to disconnect the oscilloscope frame earth.
PERSONNEL
When working inside the UPS (trained personnel only) it is recommended that protection be worn to
prevent eye damage, should an electric arc be struck by mishandling or severe electrical fault.
Some of the power components are very heavy. If their removal is necessary, ensure that sufficient
manpower is available; otherwise use adequate mechanical handling equipment.
When working in the general area of the UPS where high voltages are present, a second person should
be standing-by to assist and summon help in case of accident.

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Chapter 1-General Description 9
1.1 Introduction 9
1.2 Design Concept 9
1.2.1 7400-M Module Design 9
1.2.2 Bypass supplies 10
1.2.3 UPS Power Switch Configuration 11
1.2.4 Battery Circuit Breaker 11
1.2.5 Battery Cabinet/ Racks 11
1.2.6 Battery Circuit Breaker Box 11
1.2.7 Battery temperature compensation (optional) 11
1.3 Operator Control and Display Panel 13
1.3.1 LED Indications 14
1.3.2 LCD Display 15
Chapter 2-Operating Instructions 19
2.1 Introduction 19
2.1.1 General notes 19
2.2 Procedure for switching the UPS to Power the Load from a Power off condition 21
2.3 Procedure for switching the UPS into a Maintenance Bypass condition
from normal operation 22
2.4 Procedure for Switching the UPS ON from a Maint. Power down condition 24
2.5 Procedure for completely powering down the UPS 25
2.6 Procedure for carrying out a RESET after a recognised
controlled transfer to bypass or EPO action 27
Chapter 3 -Installation Procedure 28
3.1 Introduction
3.1.1 Equipment positioning and Environmental considerations 29
3.1.2 Raised floor installation 29
3.1.3 Battery Location 30
3.2 Preliminary Checks 32
3.3 Connecting the UPS power cables 33
3.3.1 Cable entry 33
3.3.2 Cable rating 33
3.3.3 Cable connections 34
3.3.4 Safety earth 34
3.3.5 Protective devices 34
3.3.6 Cabling procedure 35
3.4. Battery Installation 39
Table of Contents

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Chapter 4-Optional Equipment 42
4.1 AS400 Alarm Interface Board 432
4.1.1 Remote control inputs 42
4.1.2 AS400 Interface 42
4.1.3 Alarm outputs 44
4.1.4 X2 Extension 44
4.2 Remote Alarms Interface Board 45
4.2.1 Alarm outputs 45
4.3 Additional 3 X A5400 Interface 48
4.4 Remote Alarm Monitor 49
4.4.1 Connections 49
4.5 Battery cabinet/ Racks 51
4.6 Battery circuit breaker boxes 54
4.6.1 Temperature Sensor Board 54
4.7 Communications Kits 56
Chapter 5 -Maintenance 58
5.1 Introduction 58
5.2 Safety Precautions 58
5.3 Scheduled Maintenance 58
5.3.1 Daily cheeks 58
5.3.2 Weekly checks 59
5.3.3 Annual service 59
5.3.4 Extended service 60
5.3.5 Battery maintenance 60
5.4 UPS Status parameters 61
Chapter 6 -Troubleshooting 63
6.1 Troubleshooting UPS systems 63
6.1.1 Operating parameters and limitations 63
6.1.2 General Troubleshooting Procedure 63
6.2 LED interpretation 65
6.3 Display panel message interpretation 66
6.4 Number of messages, red LED and buzzer 68
Chapter 7 -1 +1 Parallel System 70
7.1 Generality 70
7.1.1 Introduction 70
7.1.2 Design concept 73

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7.2 Operating Instructions 75
7.2.1 Generality 75
7.2.2 Switching the system to Power the load from a power off condition 75
7.2.3 Switching the system to Maintenance bypass from Normal operation 75
7.2.4 Switching the system ON from a Maintenance power down condition 75
7.2.5 Powering down the system 75
7.2.6 Reset of the system after a recognised transfer to bypass or EPO Action 76
7.2.7 Powering down and insulating one module, the other still operating and back 76
7.3 Installation Procedure 77
7.3.1 Preliminary Cheeks 77
7.3.2 Power cables 78
7.3.3 Control cables 79
7.4 Optional Equipment 80
7.4.1 Auxiliary Battery Distribution Boxes 80
7.5 Specifications for 1 +1 configuration 83
Chapter 8 -Specification Single Module 84
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1.1 Introduction:
The 7400-M series Uninterruptible Power Supply (UPS) system is
connected between a critical load, such as a computer, and its three
phase mains power supply. Being designed to furnish a well
regulated 3 phase output power supply under all rated load and input
supply conditions, the system offers the user the following advantages:
Increased power quality:
The UPS has its own internal voltage and frequency regulator which
ensure that its output is maintained within close tolerances
independent of voltage and frequency variations on the mains power
lines.
Increased noise rejection:
By rectifying the input AC power to DC power, and then converting it
back to AC, any electrical noise present on the input mains supply line
is effectively isolated from the UPS output, therefore the critical load
sees only clean power.
Power blackout protection:
If the mains power fails, the UPS continues to power the critical load
from its battery source, leaving the load immune from power
disturbances.
1.2 Design Concept
1.2.1 7400-MModuleDesign This section describes an individual module’s operating principles.
The UPS basically operates as an AC-DC-AC converter (see figure 1-
1). The first conversion stage (from AC to DC) uses a 3 phase, fully
controlled SCR bridge rectifier to convert the incoming mains supply
into a regulated DC busbar.
The DC busbar produced by the rectifier provides both battery
charging power and power to the inverter section –which utilizes the
latest IGBT switching, pulse width modulation (PWM) design and
provides the second conversion phase; i.e. reconverting the DC
busbar voltage back into an AC voltage waveform.
Chapter 1 –General Description
Figure 1-1: Single Module Block Diagram
RECTIFIER STATIC
SWITCH
INVERTER
BATTERY
Bypass
Supply
Mains
Supply
UPS
Output
Supply