Schrack AVARA Sentryum USS3M Series User manual

User Manual
UNINTERRUPTIBLE POWER SUPPLY
Series AVARA Sentryum
SERIE USS3M - USS3T 10 - 20 kVA
1 - 3 phase input / 1 phase output (USS3M..)
3 phase input / 3 phase output (USS3T..)
On Line / Double Conversion (VFI) Technology

2
INTRODUCTION
For information with regards to the use of, and to ensure that you obtain the best performance from your UPS. This
manual should be stored near to the UPS and must be READ PRIOR TO PERFORMING ANY OPERATIONS UPON IT.
NOTE: Some of the images in this document are provided as a guideline only, and they may not accurately reproduce the
depicted product components.
SAFETY PRECAUTIONS
Read the specific safety manual prior to performing any operations upon the USS3T - USS3M UPS.
This manual must be read in conjunction with the installation manual that contains further information with regards to the safe
configuration of the product.
ENVIRONMENTAL PROTECTION
Whilst developing its products, the companytakes great care to analyses all environmental issues. All our products seek the objectives
defined by the policies of the environmental management system, developed by the company according to the current legislation.
Hazardous materials such as CFCs, HCFCs or asbestos have not been used in this product.
The packaging is made of recyclable material. Please dispose of the individual elements according to the current legislation in force
in the country where the product is to be employed. Please refer to Table 1 for identifying the materials:
DESCRIPTION
MATERIAL
Pallet
Wood
(FOR)
Packaging box
Corrugated cardboard
(PAP)
Protective bag
High Density
Polyethylene (PE-HD)
Buffers
Low Density Polyethylene
(PE-LD)
Table 1 –Packaging material list
DISPOSAL OF THE PRODUCT
The UPS contains materials which (in case of decommissioning/disposal) are considered TOXIC and DANGEROUS WASTE, for
example circuit boards and batteries. Treat such material according to the current legislation by using licensed disposal centres. Their
correct disposal helps to protect the environment and human health. If the various components are to be stored, pending admission
to landfills, take care to keep them in a safe place and protected from atmospheric agents, to avoid contamination of the ground and
ground water (especially with lead and the electrolyte of the batteries).
For further information about the disposal requirements under WEEE regulations please refer to the relative manual.
©The reproduction of any part of this manual, even if partial, is forbidden unless authorised by the manufacturer.
The manufacturer reserves the right to change the product described at any time without prior notice for improvement purposes.

3
SUMMARY
GLOSSARY OF ACRONYMS 7
PRESENTATION 8
USS3T –USS3M 10/15/20KVA 8
DESCRIPTION 9
GENERAL VIEWS 10
CPT 10
ACT 11
XTD 12
COMMUNICATION 13
COMMUNICATION PORTS 13
UPS OPERATION 14
OPERATING MODES 14
ON LINE MODE 14
ECO MODE 14
SMART ACTIVE MODE 14
FREQUENCY CONVERTER MODE 14
STAND BY OFF MODE 14
OPERATING STATUS 14
NORMAL 14
STAND-BY WITH BATTERY CHARGER OFF 14
STAND-BY WITH BATTERY CHARGER ON 14
BATTERY WORKING 15
TEMPORARY BYPASS 15
MANUAL BYPASS 15
OTHER FEATURES 15
BACK-FEED PROTECTION 15
LATCH-ON-BYPASS FUNCTION 15
POWER WALK-IN15
DISPLAY 16
OVERVIEW 16
STATUS BAR 16
ICONS AND SYMBOLS 17
ACTIVE TEXT AREAS 18
NAVIGATION 18

4
SYSTEM HOME PAGE 19
SYSTEM MEASUREMENTS 21
SYSTEM STATUS 22
MENU ENTRIES 24
COMMAND PANEL 24
System Off/On command 24
Bypass command 25
Battery Test command 26
Battery Charger On command 26
ALARM TEMPORARY SUPPRESSION 26
GLOBAL SYSTEM INFORMATION 26
MAIN SETUP PAGE 27
Language setting 28
Display setting 28
System clock 29
Screen saver and buzzer 29
Change password 30
SYSTEM LOG PAGE 30
“EXPERT”LEVEL 31
GENERAL SYSTEM SETTINGS 32
General configuration 32
Operating mode 32
Auto restart 32
Auto power off 33
Enable default IN signals 33
Inverter output settings 33
Voltage setting 34
Frequency setting 34
Battery configuration 35
Battery test scheduling 35
Battery low time 35
ACCESS USERS LEVEL 36
“PowerUser” level 36
“User” level 36
ACCESS LEVEL SELECTION 37
PASSWORD CHANGE 37
STATUS LED 38
BUZZER 38
CONFIGURING THE UPS FROM DISPLAY 39
DEFAULT SETTING FOR OTHER PARAMETERS 39
DEFAULT CONFIGURATION OF THE INPUT/OUTPUT SIGNALS 40
OUTPUT SIGNALS CONFIGURATION (FACTORY DEFAULT) 40
INPUT SIGNALS CONFIGURATION (FACTORY DEFAULT) 40
INPUT SIGNALS CONFIGURATION (DEFAULT CONFIGURED FROM THE DISPLAY PANEL) 40
OPERATIVE PROCEDURES 41
PRELIMINARY OPERATIONS 41

5
SYSTEM ON DIRECT COMMAND 42
SYSTEM ON COMMAND VIA BATTERY (COLD START) 43
OPERATIONS CHECKS 44
BATTERY TEST 44
BATTERY WORKING 44
LOAD FORCED ON BYPASS 44
SWITCHING THE SYSTEM FROM ON-LINE TO MANUAL BYPASS 45
EMERGENCY MANUAL BYPASS PROCEDURE 45
RESTORE THE ON LINE MODE AFTER MANUAL BYPASS 46
LOAD ON STATIC BYPASS AFTER MANUAL BYPASS 47
SYSTEM OFF COMMAND 47
POWER OFF THE UPS WITHOUT ACCESS TO THE DISPLAY 47
OPTIONS 48
EXTERNAL BATTERY CABINET 48
BATTERY ROOM VENTILATION 49
SETTING THE RATED BATTERY CAPACITY –SOFTWARE CONFIGURATION 49
EXTERNAL BATTERY TEMPERATURE PROBE 50
EXTENDED RUN-TIME 50
DUAL INPUT 50
REMOTE MAINTENANCE BYPASS 51
EXTERNAL SYNC KIT 52
INTERNAL TRANSFORMER 53
REMOTE PANEL 54
PARALLEL 54
OPTIONAL SLOT BOARDS 54
FRONT DOOR AIR FILTER 54
IP30 VERSION 54
IPX1KIT 54
STATUS / ALARM CODES 55
STATUSES 55
COMMANDS 55
WARNING 56
ANOMALIES 56
FAULTS 57
LOCKS 58

6
TROUBLESHOOTING GUIDE 59
PREVENTIVE MAINTENANCE 62
INTRODUCTION 62
BATTERIES 62
FANS 62
CAPACITORS 62
TECHNICAL DATA TABLE 63

7
GLOSSARY OF ACRONYMS
Acronym
ITEM
Description
CPT
CPT Version
UPS model type
ACT
ACT Version
UPS model type
XTD
XTD Version
UPS model type
USS3T
Three Phase Version
Three phase output voltage UPS
USS3M
Single Phase Version
Single phase output voltage UPS
ER
Extended Runtime
Version with high battery charging current capability
DI
Dual Input
Version with separated lines for Mains and Bypass input
connections
SLOT
Expansion Slot
Slot to accommodate the communication cards and relays
expansion board
COM
Communication Board
It includes R.E.P.O., IN/OUT signals interface, USB
communication port, serial port
PAR
Parallel Board
Communication interface card between UPS for parallel
function
SWBATT
Battery Switch
Internal Battery fuse holders.
Warning: these fuse holders only disconnect the batteries
contained within the UPS cabinet
SWMB
Manual Bypass Switch
Maintenance bypass switch disconnector
SWIN
Mains Input Switch
Mains input switch disconnector
SWBYP
Bypass Input Switch
Bypass line input switch disconnector
SWOUT
Output Switch
Output switch disconnector
B+
-
Positive battery voltage/current/temp.
B-
-
Negative battery voltage/current/temp.
CB
Battery Charger
UPS internal battery charger

8
PRESENTATION
USS3T –USS3M 10/15/20KVA
USS3T –USS3M UPS Systems are intended to ensure a perfect supply voltage for the equipment connected to it, both with and
without a power supply network. Once connected and powered, the system generates an alternating sinusoidal voltage, with stable
amplitude and frequency, regardless of surges and/or variations affecting the electrical supply.
USS3T –USS3M UPS, in both three phase (USS3T) and single phase (USS3M) versions, are available in three different chassis:
CPT, ACT and XTD, whose main features will be highlighted within this manual.
USS3T –USS3M is the very our latest development resulting in a third-generation transformer-free UPS, originally introduced into
the market over twenty years ago.
This ultimate solution is rated at output power factor 1 and defined as ON LINE double conversion technology in accordance with VFI-
SS-111 classification (as set out in standard IEC EN 62040-3) and it provides the very highest levels of performance such as:
HIGH EFFICIENCY: up to 96.5% in ON LINE double conversion mode.
ULTIMATE TECHNOLOGIES: USS3T –USS3M applies the advanced technologies such as DSP (Digital Signal Processor),
dual core microprocessor, three level inverter circuits and resonant control to provide maximum protection to the critical loads,
whilst maintaining optimised energy savings.
COMPACTNESS AND FLEXIBILITY: USS3T –USS3M is offered in three different frame solutions (CPT, ACT and XTD) to
suit any installation scenario and satisfy any critical power demand.
GRAPHIC DISPLAY: USS3T –USS3M offers a multiplatform communication choice together with a coloured graphic touch
screen display to easily monitor and manage the UPS.
CPT
ACT
XTD

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DESCRIPTION
The purpose of a UPS is to provide a perfect power supply voltage for the devices connected to it, irrespective of whether the mains
power supply is present or not. Once connected and powered, the UPS generates a sinusoidal alternating voltage with a stable
amplitude and frequency, regardless of any changes and/or variations occurring on the electricity network. Whilst the UPS receives
energy from the mains supply, the DSP will ensure that the connected batteries remain charged. The DSP also monitors the amplitude
and frequency of the mains voltage, the amplitude and frequency of the voltage generated by the inverter, the load applied, the internal
temperature and the condition of the connected batteries.
The block diagrams below show each of the components that make up the UPS for both single and dual input versions.
Block diagram showing the single input UPS (without separate bypass)
Block diagram showing the dual input UPS (with separate bypass)

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GENERAL VIEWS
CPT
FRONT
REAR
1. Touch screen display
8. Slot for optional accessory communication cards
2. UPS status LED
9. Internal battery fuse holders (SWBATT)
3. Battery start button (COLD START)
10. Mains input switch (SWIN)
4. Communication ports (R.E.P.O., IN/OUT SIGNAL)
11. Output switch (SWOUT)
5. Communication ports (USB, SERIAL)
12. Manual bypass switch (SWMB)
6. Parallel card (optional)
13. Brake plate
7. Slot for optional accessory communication and contacts cards

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ACT
FRONT
REAR
1. Touch screen display
9. Internal battery fuse holders (SWBATT)
2. UPS status LED
10. Mains input switch (SWIN)
3. Battery start button (COLD START)
11. Output switch (SWOUT)
4. Communication ports (R.E.P.O., IN/OUT SIGNAL)
12. Manual bypass switch (SWMB)
5. Communication ports (USB, SERIAL)
13. Brake plate
6. Parallel card (optional)
14. Bypass input switch (SWBYP)
7. Slot for optional accessory communication and contacts cards
15. Terminal cover panel
8. Slot for optional accessory communication cards

12
XTD
FRONT
REAR
1. Touch screen display
9. Internal battery fuse holders (SWBATT)
2. UPS status LED
10. Mains input switch (SWIN)
3. Battery start button (COLD START)
11. Output switch (SWOUT)
4. Communication ports (R.E.P.O., IN/OUT SIGNAL)
12. Manual bypass switch (SWMB)
5. Communication ports (USB, SERIAL)
13. Brake plate
6. Parallel card (optional)
14. Bypass input switch (SWBYP)
7. Slot for optional accessory communication and contacts cards
15. Terminal cover panel
8. Slot for optional accessory communication cards
16. Schuko socket (10A max)

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COMMUNICATION
COMMUNICATION PORTS
The communication ports are situated in the top section at the rear of the UPS. Refer to the following image for the exact location of
each port.
4
R.E.P.O / IN / OUT:
these are digital inputs and dry contact outputs
available to the user to perform various functions.
The R.E.P.O. input is fixed for the Remote
Emergency Power Off normally closed contact (the
UPS is supplied with a link pre-fitted from the factory
as standard).
All the other inputs and outputs can be programmed
with the aid of the configuration software.
Please refer to the installation manual for more
information with regards to the connections.
5
USB / Serial RS232 ports:
These ports allow the UPS to communicate with a
computer enabling the system to be monitored and
configured.
The two ports cannot be used simultaneously.
The USB port is to be used as an alternative to the
RS232 serial interface.
USB port function is only guaranteed when using a
cable no longer than 1.5m. If a longer cable is
required, the use of the RS232 serial interface is
recommended.
6
Parallel board:
An optional parallel board can be fitted into the UPS
in order to enable up to eight three phase units
(USS3T) or four single phase units (USS3M) to be
connected in parallel.
For further information with regards to this function,
please refer to the parallel board kit user manual.
7
SLOT 2 - Communication and contact Slot:
Slot to accommodate additional communication
cards (default configuration), or contacts/relay
expansion cards.
For further information with regards to the
communications expansion cards, please refer to
the communications card user manual.
8
SLOT 1 - Communication Slot:
Slot to accommodate the additional communication
cards (no contacts/relay card).
For further information with regards to the
communications cards, please refer to the
communications card user manual.

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UPS OPERATION
OPERATING MODES
The UPS can be configured for different operating modes. The following operating modes as listed below may be selected.
ON LINE MODE
When in ON LINE mode, the system operates in ON LINE double conversion. This mode provides maximum protection for the load.
During operation the energy coming from the electrical supply network (AC), is converted into a clean and stable output.
The voltage supplied to the load is a perfect sinewave, with the frequency and voltage independent of the incoming mains supply (VFI
technology). During this mode, the batteries are constantly maintained under charge.
ECO MODE
In order to optimise efficiency, in ECO MODE, the load is normally powered via the bypass (any disturbances that occur within the
network can affect the load). In the event of a mains power supply failure or if the power supply is not within the pre-set tolerances,
the UPS will seamlessly switch to ON LINE operation automatically. Approximately five minutes after the power supply returns within
tolerance, the load is switched back to bypass.
SMART ACTIVE MODE
The UPS may be set in SMART ACTIVE mode during which, according to the statistical data of the quality of the mains power supply,
the UPS will autonomously decide the most appropriate operating mode between ON LINE and ECO MODE.
FREQUENCY CONVERTER MODE
The system can be configured in this mode to generate a fixed output frequency different from the input frequency. This configuration
automatically disables the bypass line. FREQUENCY CONVERTER mode can be operated with and without connected batteries.
WARNING: Do NOT switch on the SWMB (manual bypass switch) when the UPS is in FREQUENCY CONVERTER mode.
To prevent maintenance bypass operation, the user shall lock the SWMB switch handle. To first configure this operating mode, open
the SWOUT (Output switch).
STAND BY OFF MODE
The UPS is set to operate only in an emergency: when the mains power is present, the load is not powered and the battery remains
charged; in the event of a mains supply failure, the load is powered by the inverter from the batteries, and is then powered off once
the mains supply returns. The activation time is less than 0.5 sec. When the mains supply returns, the output is powered off after a
certain period of time (configurable) has passed. In default configuration, if the mains returns, the output is immediately powered off
(default time 0s).
OPERATING STATUS
The UPS may be in a different status for each operating mode explained above. The following is a list of possible operating states.
NORMAL
When the UPS operates "normally" in the selected Operating Mode without any alarm.
In this condition the selected "Operating Mode" is displayed in light blue.
STAND-BY WITH BATTERY CHARGER OFF
This is the default status when the UPS is supplied. The UPS is powered but the system is in idle status (no power stages are active).
STAND-BY WITH BATTERY CHARGER ON
When the UPS is supplied, the user can turn on the battery charger without turning on the whole UPS. In this condition the load is not
supplied.

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BATTERY WORKING
When the UPS is supplying the output with the batteries present, if the mains supply network falls outside the pre-set tolerances, for
example in case of a blackout, voltage or frequency disturbance, the system automatically switches to BATTERY OPERATING
STATUS and draws power from the batteries to support the load.
Once the mains supply network is again clean and stable, the system automatically returns back to the pre-set operational mode.
TEMPORARY BYPASS
During this operational state, the load is directly powered by the incoming mains supply, therefore, any input disturbances will
directly affect the connected load.
MANUAL BYPASS
The manual bypass enables the user to physically connect the UPS input directly to the output. This condition is required to perform
maintenance operations on the UPS without the need to disconnect the power from the protected load.
Before closing the manual bypass switch, an auxiliary contact informs the UPS that the load is going to be transferred to manual
bypass. This activates an immediate, synchronised transition to the internal static bypass to ensure a safe closure of the manual
bypass power contacts.
WARNING: Maintenance work inside the UPS is to be performed exclusively by qualified staff. There may be
voltages present within the UPS even when the input, output and battery fuse holders are open. Removal of the
UPS panels by non-qualified staff may result in injury to the operator and damage the equipment.
For further instructions in relation to the manual bypass function, please refer to the “Switching the system to manual bypass” chapter.
OTHER FEATURES
BACK-FEED PROTECTION
The UPS has an internal protection against back-feed. This protection acts by means of a sensing circuit which turns off the inverter
if a fault within the static switch is detected. In this condition, to avoid interrupting the supply to the connected load, the UPS switches
to bypass line.
If the bypass is not available, the connected load is switched off.
To avoid stopping the inverter, a dry contact can be configured to drive a disconnection device. This device must be installed upstream
of the bypass input to the UPS, in this case when a back-feed fault occurs, the system opens the external disconnection device (for
further information, refer to the configuration software manual).
The label supplied with the UPS must be affixed to all isolators installed in the electrical system upstream of the
UPS.
LATCH-ON-BYPASS FUNCTION
The UPS has an internal device (redundant bypass power supply) which activates the bypass automatically when a major failure
occurs within the UPS; thus, keeping the load powered without any internal protection and without any limitation to the power supplied
to the load.
WARNING: Under these emergency conditions, any disturbance present at the input supply will affect the load.
POWER WALK-IN
The Power Walk-In function can be activated through the configuration software. This function enables, upon reconnection to the
network (following a mains supply failure), a progressive absorption of power from the incoming supply, in order to avoid stressing
(due to the inrush current) a generator or a weak network which is potentially installed upstream. The duration of the Power Walk-In
mode can be set between 1 to 120 seconds. As default configuration the Power Walk-In is disabled, however the maximum input
current is limited. During this mode the required power is partially taken from the batteries and partially from the network whilst
maintaining a sinusoidal power ramp-up. The battery charger is only switched on once the transition is complete.

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DISPLAY
OVERVIEW
The UPS is equipped with a 5’’ touch screen colour display, through which, amongst others, it is possible to:
view the status of the system;
switch on / switch off the system, activate a battery test and perform bypass operation commands;
configure the system, access levels and the network services.
The “Home” page shows a synoptic diagram of the general operation status of the system. It is possible to interact with the system
and access further information via the icons.
STATUS BAR
The status bar at the top shows the UPS model, the rated power of the system and the system date and time.
In the event of an alarm an exclamation mark will also be present indicating the number of alarms active at that time.
In parallel system configuration, the status bar shows “-M” if the UPS is master or “-S” if the UPS is slave.
From the top of the status bar the user can access the anomaly/alarm log by pressing the “Exclamation mark” icon.
The “Exclamation mark” icon will only be visible if an anomaly, warning, lock or command occurs.
Icon indicating the existence and number of alarms that are active at that time. If you tap on the icon, a pop-up will
appear showing the individual alarms in detail. To close the pop-up, tap the "exclamation mark" icon again.
In the list of alarms:
Blue messages indicate warning (W) alarms;
Orange messages indicate anomalies (A) alarms;
Red messages indicate lock (L) alarms and faults (F) alarms.
For the alarm code list, refer to the “STATUS/ALARM CODES” chapter.

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ICONS AND SYMBOLS
System input/mains status
% Battery charge level
System output status
% Phase 1 load level
Bypass status
% Phase 2 load level
Battery status
% Phase 3 load level
System status
Manual bypass switch closed (SWMB)
In general, the color and the shape of the icons provide instant information to the status of the system.
Grey: communication lost (Com-Lost)
Orange: anomaly
Light blue: normal status
Flashing red: alarm
Blue: Temporary bypass status

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ACTIVE TEXT AREAS
NAVIGATION
Menu expansion / reduction tab icons (the menu reduces automatically after a few
seconds). The menu may change depending on the pre-set access level.
HOME
Press this icon to close the currently selected page and return to the Home page.
RETURN
Press this icon to go back to the previous page.
SAVE
Press this icon to save any changes.
EXIT WHITOUT SAVING
Press this icon to exit without saving changes.
System Status: area of the display reserved for thedescription of the system status.
If the UPS is in NORMAL MODE this area will indicate the current operating mode,
or another operational system state. NORMAL MODE means that the UPS is
working in the expected operational state for the configured operating mode (e.g.
when in ON LINE mode the expected status is “Load on Inverter”, during ECO MODE
the expected operating state is “Load on Bypass”)
Mains Input: Area of the display reserved for displaying the main electrical values
related to the input to the system.
Battery: Area of the display reserved for displaying the mainelectrical values related
to the battery.
Bypass input: Area of the display reserved for displaying the main electrical values
related to the bypass line.
Output: Area of the display reserved for displaying the main electrical values related
to the output of the system.

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SYSTEM HOME PAGE
The home page provides a schematic view of the overall operating condition of the system. It is possible to interact with the system
and access further information via the icons .
Depending on the current state of the system, this page may assume different appearances as shown in the examples below.
The user can return on the home page at any time by tapping the “Home” icon on the status bar.
The following are some examples of the home page whilst displaying various operating conditions:
Home page displaying UPS in ON LINE mode (normal operation, load on inverter).
- DUAL INPUT version -
Home page displaying UPS in ON LINE mode (normal operation, load on inverter).
- SINGLE INPUT version -
Home page displaying UPS in ECO mode (normal operation, load on static bypass).

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Home page displaying BATTERY WORKING status.
Home page displaying MANUAL BYPASS SWITCH CLOSED.
Home page with alarm drop-down list opened.