Lega T Series User manual

USER MANUAL
T SERIES
T - 250 kVA
T - 300 kVA

CONTENTS
SAFETY
SAFETY.............................................................................................................................................2
I. GENERAL DESCRIPTION .........................................................................................................3
1.1 Introduction .........................................................................................................................3
1.2 Design Concept...................................................................................................................4
1.2.1 The Operating Modes of UPS....................................................................................5
1.2.2 The Power Configuration of UPS................................................................................5
1.3 Technical Specifications......................................................................................................9
II. FRONT PANEL .........................................................................................................................10
2.1 Introduction..........................................................................................................................10
2.2 Alarms And Status Messages.............................................................................................10
2.3 Menu Description.................................................................................................................13
2.4 MAIN MENU .......................................................................................................................15
2.5 MEASURES MENU ITEMS.................................................................................................15
2.6 ALARMS Menu Items..........................................................................................................15
2.7 INFORMATION Menu Items ..............................................................................................16
2.8 SETTINGS Menu Items......................................................................................................16
2.9 COMMAND Menu Items .....................................................................................................17
2.10 TIME MENU ITEMS.........................................................................................................18
2.11 PASSWORD Menu Items.................................................................................................18
III. PARALLEL OPERATION...........................................................................................................19
3.1 Introduction..........................................................................................................................19
3.1.1 Security .....................................................................................................................19
3.1.2 Redundancy ..............................................................................................................19
3.1.3 Power Increment........................................................................................................19
3.2 Parallel Operation Modes.....................................................................................................19
3.2.1 Symetric Parallel Mode..............................................................................................19
3.2.2 Redundant Parallel Mode.........................................................................................20
3.2.3 Hot Standby Mode ....................................................................................................21
3.3 Parallel Operation Mode Fault Codes...................................................................................21
3.4 Parallel System Accessories................................................................................................21
IV. OPERATING INSTRUCTIONS...................................................................................................23
4.1 Introduction..........................................................................................................................23
4.2 Procedure For Switching The UPS To Power The Load From a Power-Off Condition...........23
4.3 Procedure For Switching The UPS Into a Maintenance Bypass From Normal Operation ......23
4.4 Procedure For Switching The UPS ON From a Maintenance By-Pass
Power Down Condition ........................................................................................................24
4.5 Procedure For Switching The UPS ON From Static By-Pass................................................24
4.6 Procedure For Completely Powering Down The UPS...........................................................24
4.7 When Utility Power Is Interrupted.........................................................................................25

V. INSTALLATION PROCEDURE..................................................................................................26
5.1 Introduction..........................................................................................................................26
5.2 Unpacking ...........................................................................................................................26
5.3 Equipment Positioning.........................................................................................................26
5.4 Connecting The UPS Power Cables.....................................................................................27
5.4.1 Safety Earth...............................................................................................................28
5.4.2 Cable Connections.....................................................................................................28
5.4.3 Battery Installation .....................................................................................................31
5.4.4 The Communication (UPS-Server).............................................................................33
VI. CUSTOMER SERVICE...............................................................................................................34
6.1 Maintenance........................................................................................................................34
6.2 Troubleshooting...................................................................................................................34
6.3 Storage................................................................................................................................34
VII. REMOTE MONITORING AND CONTROL ................................................................................35
7.1 Using Serial Port .................................................................................................................35
7.2 Serial Communication Cable ..............................................................................................35
7.3 Modem Connection .............................................................................................................35
7.3.1 Hardware Configuration .............................................................................................35
7.3.2 Functioning Principle..................................................................................................35
7.3.3 SMART Modem Programming (PC modem)...............................................................35
7.3.4 DUMB Modem Programming .....................................................................................35
7.3.5 DUMB Modem –UPS Connection Cable.....................................................................35
7.4 Dry Contact (Interface) Connection.....................................................................................37
7.5 Remote Monitoring Panel.....................................................................................................37
VIII. LIMITED WARRANTY................................................................................................................38

2
SAFETY
This manual contains important instructions for T series UPS that should be followed during installation and
maintenance.
IMPORTANT NOTICES
1. Read instructions carefully before operating the UPS
2. All warnings in the manual should be adhered to.
3. All operating instructions should be followed.
4. The unit should be supplied by a grounded outlet. Do not operate the unit without ground source.
5. Power cord of the UPS should be routed carefully so that they are not to be walked on.
6. Please save this manual.
7. Please save or recycle the packaging materials.
WARNING !
Do not insert any object into ventilation holes or other openings.
To reduce the risk of fire or electric shock, install in temperature and humidity controlled indoor area free of
conductive contaminants.
To reduce the risk of fire, replace fuses with the same type and rating when necessary.
CAUTION !
Only qualified personnel should install or service UPS/batteries.
Risk of electric shock, do not remove cover. No user serviceable parts inside, refer servicing to
qualified service personnel.
The output may be energized when the unit is not connected to a mains supply.
Risk of electric shock hazardous live parts inside this unit are energized from the battery supply
even when the input AC power is connected.
Turn OFF the UPS before installing a computer interface signal cable. Reconnect the power cord only after
signaling interconnections have been made.
CAUTION !
Units are designed to operate on the concrete floor.
ABOUT THE BATTERY
A battery can present a risk of electric shock or burn from high short circuit currents. The following
precaution should be observed when working on batteries :
* Remove watches, rings or other metal objects.
* Use tools with insulated handles.
The batteries in this UPS are recyclable. Batteries must be disposed of according to local environmental
laws. The batteries contain lead and pose a hazard to the environment and human health if not disposed of
properly.
Do not dispose of batteries in a fire. The batteries will explode. Do not open or mutilate the batteries. They
contain an electrolyte which is toxic and harmful to the skin and eyes. If electrolyte comes into contact with
the skin the affected area should be washed immediately.
The energy source (the battery) cannot be de-energized by the user.

3
I. GENERAL DESCRIPTION
1.1 Introduction
T Uninterruptible Power Supplies, are On-Line UPS’s, being manufactured with the state-of-the art PWM and
IGBT technology, produce microprocessor controlled pure sine wave output to critical loads.
T series UPS’s install between the critical load and the mains.
The advantages of using UPS:
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.
Increased power quality:
The UPS has its own internal voltage and frequency regulator circuits, 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.
WARNING for restricted sales distribution.
Features :
Parallel mode operation (optional) up to 2 UPS. (1 redundant)
On-line technology with pure sine wave output.
PWM and IGBT technology.
3 Microprocessors at each UPS
Microprocessor controlled main controller board.
Microprocessor controlled rectifier board.
Microprocessor controlled parallel control board.
Static (STS) and maintenance by-pass.
LCD (Liquid Crystal Display) display.
Alarm history (Memory for max. 64 alarms.)
High quality maintenance-free lead-acid type batteries.
High nonlinear load capacity, special for computers.
Automatic and Manual Battery Test System:
After all the pre conditions ensured, the battery test is made periodically by itself.
Interactive battery management system (optional)
Nonlinear loads driving capability.
Facility of connection with the PC:
In case of failure, alarms of the UPS (Battery low, mains control or general) is shown by the dry relay contacts
and RS232, to the user. The relay interfaces are specially produced for the server systems (IBM AS400
and Microsoft Windows NT).
Accessories:
oOptional UPS monitoring software ( RUPS, RUPSII, UPSILON) SNMP devices, compatible to
any operating system.
oRemote Monitoring Panel (RMP) available: You can observe the UPS status and parameters without
using a computer at a remote location up to 200 meters away (via RS485 interface). Up to 5 remote
monitoring panel connection is possible.
oUPS Port Sharer up to 24 server is available

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1.2 Design Concept
S1
: Inverter input power switch
S2
: Static by-pass input power switch
S3
: Maintenance by-pass power switch
S4
: UPS power out switch
S5
: Battery circuit breaker (optional)
RECTIFIER: The first conversion stage (from AC to DC) uses a 3 phase, fully controlled rectifier to convert the
incoming mains supply into a regulated DC BUS BAR. The DC BUS BAR produced by the rectifier provides
both battery charging power and power to the inverter section.
BATTERY GROUP: It keeps as an reserve DC power supply, for the inverter in case of mains failure.
INVERTER: It is made by utilizing the latest technology of power transistor (IGBT) and pulse width modulation
(PWM). Inverter converts dc bus voltage into (second conversion) an alternative voltage like line voltage. And
provides this voltage and frequency being fixed.
STATIC TRANSFER SWITCH (STATIC BY-PASS): Two types of bypass circuitry is available for T series UPS
Full static switch for parallel systems
Half static switch for normal UPS
The circuit block annotated contains an electronically controlled switching circuit, which enables the critical
load to be connected either to inverter output or to a by-pass power source via the “static by-pass line”.
Normally at standart models, the load is connected to the inverter via a contactor K1 (controlled by the static
switch circuits); but in the event of a UPS overload, or inverter failure, it is automatically transferred to the
static by-pass line.
In parallel systems the second static switch is builded, from inverter output, to load.
Inverter
Rectifier
Static By-pass
Static Transfer Switch
Maintenance By-pass
Mechanic Transfer Switch
3 Phase
Line
Input
3 Phase
Load
Output
Battery Group
S3
S2
S1
S5
S4
Figure 1-1 Block Diagram

5
MECHANIC TRANSFER SWITCH (MAINTENANCE BY-PASS): A second, manually controlled, ”maintenance
by-pass” supply is also incorporated into the UPS design. Its purpose is to enable the critical load to be
powered from the mains (by-pass) supply while the UPS is shut down for maintenance or troubleshooting.
The load is unprotected against mains power supply aberrations or failure when it is connected to either the
static by-pass or maintenance by-pass supply.
BATTERY CIRCUIT BREAKER: There is a fuse loadbreak switch (externally mounted) between the UPS and
the batteries. The battery is connected to the DC BUS BAR through a fuse loadbreak switch. This switch has
two built-in fuses (one for battery plus, and one for battery minus). This circuit breaker is closed manually.
Also electronic controlled battery circuit breaker (optional) available. This circuit breaker is closed manually
but it contains an under voltage release coil which enables it to be tripped from the UPS control electronics
following certain detected faults. It also has a magnetic trip facility for overload protection.
BATTERY GROUP (CABINET): The batteries associated with the UPS are generally housed in a purpose-built
cabinet located along-side the main UPS equipment. For a long-term efficiency from the batteries, keep them in
room temperature (20C).
1.2.1 The Operating Modes of UPS
A. Normal Operation (If there is a main) : All relevant power isolators and circuit Breakers
Closed (except mechanical bypass circuit breaker), the load is powered by the UPS. Also during the
normal operation battery charges. This is made by the UPS’s rectifier.
B. Battery operation:
During this operation Inverter part of the UPS is converting DC power (from battery group) to AC
power, and feeding the load. Critical load works till the batteries are being empty. At the end of
discharge UPS gives ”A7 BATTERY LOW” alarm.If the batteries are fully discharged UPS gives
“A5 BAT.AUT END” message and shutdown. When the mains is restored the UPS returns back to
normal operation.
NOTE: The battery circuit breaker must be turn to “1” position when the mains is restored. If not in a
second main failure the critical load will be without Voltage.
C. On maintenance by-pass: UPS shutdown but the load connected to the unprotected mains
via the maintenance by-pass supply line.
D. Parallel operation : (optional, need special hardware) At least 2 UPS’s is installed to system
for increasing security and redundancy, they operates together and interactive.
1.2.2 The Power Configuration of UPS
The power switch location of the T series UPS’s are shown in the figures 1.1-2-3 In the figure 1.2 external (split)
by-pass block diagram is given. Optionally the static and mechanic by-pass line can be connect to a different 3
phase AC source ( other UPS etc.),and the rectifier input is connected to generator or mains voltage. If there is
no other power supply static and mechanic by-pass line input (S2) and the rectifier input connections will be
connect to each other. (See figure 1.1)
During the normal operation except the maintenance by-pass switch, all the Switches will be at “1-On” position.

6
3 phase
load
output
Inverter
Rectifier
Static By-Pass
Static Transfer Switch
Maintenance Bypass
Mechanic transfer switch
3 Phase
Line
Input
Battery group
S3
S2
S1
S5
S4
3 Phase
By-Pass
Supply
Input
Figure 1.2 UPS Split (external) By-Pass Block Diagram

7
Parallel System
Data Socket
(DB25 Female)
(optional)
RS232
Communication
Port
(DB9 Female)
Parallel System
Analog Signals
Socket
(DB15 Female)
(optional)
Dry Relay Output Contacts
Battery Circuit
Breaker Input
Emergency
Stop
Line Failure
Relay
Battery Low
Relay
By-Pass
Relay
Figure 1.3 250-300 kVA Power Switch Locations
RS232 –SNMP
Communication
Select Switch
SNMP Socket
(optional)
S2
S4
S1
S3