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OCTOBER 2002 MAXI-T MANUAL
OPERATING MANUAL
MAXI-T
SINGLE PHASE INPUT / OUTPUT
ON-LINE UPS
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OCTOBER 2002 MAXI-T MANUAL
CONTENTS
INTRODUCTION
General Description
Location
INSTALLATION
General
Input and Output cabling and circuit breaker data
Battery Details
Battery Configuration
Battery Connection
SYSTEM OPERATING PROCEDURES
Initial Start-up
Transfer of Load to Reserve
TROUBLE SHOOTING
Description of alarms
TECHNICAL SPECIFICATIONS
DC Data
Battery
Dimensions and weights of UPS cabinet
UPS SERVICE HISTORY
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OCTOBER 2002 MAXI-T MANUAL
INTRODUCTION
GENERAL DESCRIPTION
The Maxi-T range of UPS units utilises a modern innovative design providing many benefits
to the user.
A battery is kept charged via the switching circuit and in the event of a mains failure, the
battery takes over supplying power to the inverter.
The result is that the UPS supplies an uninterrupted, regulated and controlled supply to the
connected load under all conditions including mains failure, load steps and at minimum
battery levels.
To provide additional security to the connected load, a static bypass switch will transfer the
load to the mains supply under overload or fault condition.
The units are housed in a compact aesthetically pleasing cabinet, which includes a userfriendly digital front panel.
LOCATION
The following should be considered when planning the location of your UPS.
1. Protect against excessive temperature and humidity
2. Protection against elements – especially moisture.
3. Ease of access.
4. Ease of electrical reticulation.
5. Adequate ventilation clearance.
6. Close proximity to the UPS battery.
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OCTOBER 2002 MAXI-T MANUAL
INSTALLATION
GENERAL
The following information will be of assistance when installing your UPS. Care should be
taken to select the correct circuit breakers and cable sizes. Information is provided in TABLE
1 that will assist with the selection.
INPUT AND OUTPUT CABLING AND CIRCUIT BREAKER DATA
The recommended input circuit breaker (in clients’ DB board) and cable sizes for the different
UPS units are as follows:
NOTE:
• The input circuit breaker must have a D curve rating.
• All cable sizes are rated for a maximum distance of up to 50 meters.
UPS RATING INPUT
AMPS
RECOM I/P
ACB
INPUT CABLE OUTPUT
AMPS
OUTPUT
CABLE
3kVA 13(1ph) 20A 1 pole 4mm2 2c+e 13A 4mm2 2c+e
5kVA 22(1ph) 30A 1 pole 6mm2 2c+e 22A 4mm2 2c+e
8kVA 35(1ph) 40A 1 pole 10mm2 2c+e 35A 6mm2 2c+e
10kVA 44(1ph) 50A 1plole 10mm2 2c+e 44A 10mm2 2c+e
15kVA 67(1ph) 80A 1 pole 16mm2 2c+e 65A 16mm2 2c+e
20kVA 87(1ph) 100A 1
pole
20mm2 2c+e 87A 20mm2 2c+e
.
Figure 1: Installation wiring layout.
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BATTERY DETAILS
Please take special care when installing the batteries and note the following:
• Batteries should only be installed by a qualified technician.
• Take special care when installing the battery trays
• Do not short out the battery terminals.
• Do not drop the batteries.
• Ensure that the polarity connections are correct.
• Ensure that the battery interconnections are securely fastened.
• DC is dangerous and can be lethal
• Battery life is considerably shortened when operated at temperatures above 25ºC.
• Keep batteries away from direct sunlight and keep the room as cool as possible.
The following battery cables and accessories are supplied with your unit:
• Short inter-battery connectors
• Medium end connector cables
• Long cables for connection to DC terminals F1, F2, F3.
BATTERY CONFIGURATION
A battery tray can house 16 batteries. [32 batteries per bank.]
The UPS cabinet can house a total of 2 or 4 battery trays. [32 or 64 batteries in total.]
An optional external battery cabinet can house an additional 6 trays. [96 batteries extra.]
BATTERY CONNECTION
Open all three battery fuses.
Populate the battery trays, each with 16 x 12V x 7A/h batteries - terminals facing out - see
figure 2.
Connect the short interconnecting cables to all the batteries on the LHS and RHS.
Connect the long red and black cables at the front of the tray but do not connect the longer
link at the back of the tray.
Insert trays into the UPS, starting at the bottom - taking care not to pinch any of the cables
that must go through their respective holes (in the front).
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BATTERY CONNECTION (cont…)
Connect the lower shelf's black cable (negative) to bottom of F2 and the upper shelf's red
cable (positive) to the bottom of F1 (as shown in figure 2).
Connect the remaining long red and black cables to either side of F3.
Slightly open each battery tray and measure the differential between the last two battery
terminals (closest to the back of the unit).
If this differential voltage is less than 3VDC, it is safe to insert the medium end connector
cables across those links that were just measured.
Take care when re-closing the trays that these medium connecting cables are tucked under
the above tray to avoid them being pinched.
Figure 2: Single battery bank connection diagram.
A second set of 32 batteries (2 trays) can be installed if required.
Install the second battery bank following the procedures outlined for the first battery bank.
The positive and negative of each tray will be connected in parallel to the respective tray of
the first bank.
The installation of the batteries in the external battery cabinet is identical to the procedure
described above.
The batteries housed in the external battery cabinet are also connected to terminals F1, F2 &
F3 in this cabinet and must be connected to terminals F1 & F2 in the UPS cabinet.
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SYSTEM OPERATING PROCEDURES
INITIAL START-UP OF UPS UNIT
• Turn the INVERTER KEY SWITCH to the off position.
• For 3 - 5kVA units
• Place the ROTARY BYPASS switch into the TEST position.
• For 8 - 20kVA units
• Close the BYPASS ISOLATOR (SW2).
• Open the OUTPUT ISOLATOR (SW1).
• Close the AC input circuit breaker (CB1).
• The LCD will activate.
• After a period of approximately 30 seconds the analogue values and status alarms will be
displayed.
• The unit will synchronise to input reserve source.
• Depress ALARM CANCEL button to silence alarm.
• Turn the INVERTER KEY SWITCH to the “ON” position.
• The unit will start up when synchronised to mains (reserve source).
• The UPS output voltage will ramp up to 230VAC.
• Ensure that *NO ACTIVE ALARMS* is displayed in the alarm status block and that the
battery voltage is greater than 360VDC (432VDC is the charging value).
• Measure the DC differential voltage across F1 and close this fuse if the voltage is less
than 30VDC.
• Repeat for F2 and F3.
• Turn the INVERTER KEY SWITCH to the “OFF” position and confirm LOAD ON BYPASS
is displayed on the LCD DISPLAY.
• For 3 - 5kVA units
• Place the ROTARY BYPASS switch into the NORMAL position.
• For 8 - 20kVA units
• Close the OUTPUT ISOLATOR (SW1).
• Open the BYPASS ISOLATOR (SW2).
• Turn the INVERTER KEY SWITCH to the “ON” position (CW) and depress ALARM
CANCEL button to silence alarm.
• Confirm *NO ACTIVE ALARMS* is displayed on the LCD DISPLAY within 60 sec.
• The unit is operating normally.
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TRANSFER LOAD TO RESERVE
• To transfer to bypass without loosing the load, ensure that *NO ACTIVE ALARMS* is
displayed.
• Turn the INVERTER KEY SWITCH to the off position.
• For 3 - 5kVA units
• Place the ROTARY BYPASS switch into the TEST position.
• For 8 - 20kVA units
• Close the BYPASS ISOLATOR (SW2).
• Open the OUTPUT ISOLATOR (SW1).
• The load is being supplied via the detour supply.
• Open DC Input fuses (F1, F2 andF3).
• Open AC input circuit breaker (CB1).
• Wait 1 min for the internal capacitors to discharge (Electronics will die when discharged.)
• To switch the unit on again, refer to INITIAL START-UP.
TROUBLE SHOOTING
The Maxi-T range is designed to provide the maximum reliability possible. Provided the
equipment is operated within the design specifications and is installed in the correct
environment the high-anticipated reliability will be obtained.
In the unlikely event of a failure occurring, it is advisable to seek advice from your local
service centre. This will prevent any further damage to the UPS and also prevent any
unnecessary expense.
Should any of the system circuit breakers trip, it is advisable to investigate the problem
before attempting to close the breakers, otherwise further damage could occur.
The following alarms are considered to be the type that will occur repetitively:
RES VOLTS OUT OF LIMITS
LOSS OF PHASE LOCK
LOW DC SHUTDOWN
INVERTER OVERLOAD
For detailed descriptions see “DESCRIPTION OF ALARMS”.
If any other alarms persist, contact your local service center immediately.
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DESCRIPTION OF ALARMS
ALARM EXPLANATION
HIGH DC SHUTDOWN Input dc voltage exceeded trip point (+20% of
nominal battery voltage). The over-voltage
must be active for longer than 15 seconds.
BATTERY DISCHARGING DC voltage has dropped below nominal
battery voltage, indicating that energy is
being drained from the battery and not from
the rectifier.
DC CRITICAL DC voltage has dropped to a value close to
the inverter switch-off level.
LOW DC SHUTDOWN DC voltage has dropped below the low dc trip
point (-20% of nominal battery voltage).
INVERTER IN STANDBY The inverter is off. The inverter can restart
automatically when the condition that
switched it off e.g. LOW DC SHUTDOWN
returns too normal.
INV VOLTS OUT LIMITS The inverter output voltage is out of
tolerance. (+10% or –10%).
INVERTER OVERLOADED The load connected to the output of the
inverter exceeded 120% of its full rating. This
condition was active for longer than 15
seconds.
OVER-CURRENT STOP The inverter has switched off due to
excessive overload (output current exceeded
300% for longer than 40ms).
INVERTER LOCKOUT The inverter has failed to start after 5 times
attempts within 250 seconds and has
switched off. The load will now be supplied
from the mains via the Static Switch.
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DESCRIPTION OF ALARMS (cont…)
RES V OUT OF LIMITS The reserve source voltage is out of
tolerance. (+/-15%).
LOAD ON BYPASS The Critical Load is fed from the reserve
source via the static switch.
ON/OFF SWITCH OFF The key switch on the front door is in the OFF
position.
FREQ OUT LIMITS The reserve source frequency is out of
tolerance. (+/-2%)
LOSS OF PHASE LOCK The inverter is unable to phase lock to its
reserve source.
SINE ERROR The instantaneous value of the inverter
output voltage deviated by more than 15%.
The internal voltage detector has detected
this malfunction. Load will be switched to the
reserve source if it is available.
CHARGER FAIL The Rectifier/Charger is off.
OVER-TEMPERATURE The internal temperature of the unit is
excessive.
NO ACTIVE ALARMS No alarm conditions exist the unit is operating
normally.
SUPERVISION STOP The inverter has stopped operating due to an
over-current condition detected in the IGBT
Bridge. This could be due to either an
external fault e.g. a short circuit or an internal
fault. The inverter will not restart.
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TECHNICAL SPECIFICATIONS
UPS INPUT
Input rated voltage 230V, 1 Phase +/-15%
Input frequency 50Hz, +/- 5%
Input power factor >0,9 IND
UPS OUTPUT
Rated output at 0,7 IND PF 3kVA, 5kVA, 8kVA, 10kVA, 15kVA, 20kVA
Rated output voltage 230V, 1Phase
Steady State output voltage regulation +/- 1%
from no-load to full load at rated PF
and DC voltage variation from
maximum to minimum
Transient voltage regulation with +/- 5%
100% application or removal of load
Recovery Time 30 Milliseconds
Overload Capability 200% for 15 seconds
Crest Factor Ratio 3 : 1
Total Harmonic Distortion Less than 5% (typically 3% for linear loads)
Load Power Factor From 0,6 inductive to unity within kW rating
Waveform Sinusoidal
Frequency:
Free Running 50Hz +/- 0,05%
Synchronised with mains 50Hz +/- 2% (adjustable)
GENERAL
Efficiency at full load Input - Output 95%
Audible noise Less than 50 DBA at 1 metre
Static Transfer Switch 1000% Overload 5 cycles
Operating Temperature Range at 0 degrees C to 40 degrees C
maximum humidity of 90%
Lightning protection designed to withstand standard test impulses of 6KV
and 3KA
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BATTERY
Type Lead acid maintenance free
Anticipated life 3 to 5 years depending on number of discharges
and temperature
DIMENSIONS AND WEIGHTS OF UPS CABINET
Rating 3kVA, 5kVA 8kVA, 10kVA, 15kVA, and 20kVA.
UPS cabinet, with standard battery (mm) (SHORT) 370 (W) x 650 (D) x 550 (H)
UPS cabinet, with standard battery (mm) (TALL) 370 (W) x 650 (D) x 850 (H)
Weights of UPS with one set batteries 120kg 150kg 165kg 180kg 215kg 230kg
DIMENSIONS AND WEIGHTS OF OPTIONAL BATTERY CABINET
Extended battery cabinet 370 (W) x 650 (D) x 850 (H)
Weight of battery cabinet with 3 sets batteries 300 kg
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DC DATA
5kVA 32 X 12 VOLT BATTERIES: 192 CELLS
V Float 432V
V Min 336V
Max DC discharge current 11.0A
Max DC Power 3.7kW
Maximum charging 1.4A
8kVA 32 X 12 VOLT BATTERIES: 192 CELLS
V Float 432V
V Min 336V
Max DC discharge current 17.5A
Max DC Power 5.9kW
Maximum charging 2.0A
10kVA 32 X 12 VOLT BATTERIES: 192 CELLS
V Float 432V
V Min 336V
Max DC discharge current 21.9A
Max DC Power 7.4kW
Maximum charging 3.0A
15kVA 32 X 12 VOLT BATTERIES: 192 CELLS
V Float 432V
V Min 336V
Max DC discharge current 32.9A
Max DC Power 11.0kW
Maximum charging 5.0A
20kVA 32 X 12 VOLT BATTERIES: 192 CELLS
V Float 432V
V Min 336V
Max DC discharge current 32.9A
Max DC Power 14.8kW
Maximum charging 5.0A
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UPS SERVICE HISTORY
INSTALLATION DATE
INSTALLED BY
COMMISSIONED DATE
COMMISSIONED BY
SERVICE DATE SERVICED BY
RECOMMENDED NEXT
SERVICE
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