Aros SENTRY MPS-HP User manual

S
ENTRY MP
S
-HP
USER MANUAL
U
UN NI IN NT TE ER RR RU UP PT TI IB BL LE E P PO OW WE ER R S SU UP PP PL LY Y
100 to 250 kVA Three-Phase Output

page 2 / 75 0MNA080A55-GB REV 01
AROS s.r.l.
Via Somalia, 20
200032 Cormano (MI) – Italy
Tel. [phone]
Fax [phone]
e-mail [email protected]
www.aros.it

0MNA080A55-GB REV 01 page 3 / 75
Thank you for choosing our product.
Aros is highly specialized in the development and production of uninterruptible power supplies (UPS). The UPSs of
this series are high quality products, carefully designed and manufactured to ensure optimum performance.
Symbols used in the manual
In this manual, some operations are shown by graphic symbols to alert the reader to the dangerous nature of the
operations:
Possibility of serious injury or substantial damage to the device, unless adequate
precautionary countermeasures are taken.
This symbol indicates some important information which must be read with care.
It is recommended to read this part of the manual.
Protective equipment to be worn
No maintenance operations must be carried out on the device without wearing the Personal Protective Equipment
(PPE) described below.
Personnel involved in the installation or maintenance of the equipment must not wear clothes with wide sleeves or
laces, belts, bracelets or other items that may be dangerous, especially if they are metallic. Long hair must be tied in
such a way as to ensure that it is not a hazard.
The following signs show the protective equipment that should be worn. The various items of PPE must be selected
and sized according to the nature of the hazard (particularly electrical) posed by the equipment.
Accident prevention footwear
Use: always
Protective eyewear
Use: always
Protective clothing
Use: always
Helmet
Use: When there are suspended loads
Work gloves
Use: always

page 4 / 75 0MNA080A55-GB REV 01
Definition of “operator” and “specialized technician”
The professional figure responsible for accessing the equipment for ordinary maintenance purposes is defined with
the term operator.
This definition covers personnel that know the operating and maintenance procedures for the equipment, and that
have been:
1. trained to operate in accordance with the safety standards relating to the dangers that may arise where
electrical voltage is present;
2. trained to use Personal Protective Equipment and to carry out basic first aid.
The professional figure responsible for the installation and start-up of the equipment, and for any extraordinary
maintenance, is defined with the term specialized technician.
This definition covers personnel that, in addition to the requirements listed above for a general operator, must also:
1. have been suitably trained by the manufacturers or their representative.
2. be aware of installation, assembly, repair and service procedures, and have a specific technical
qualification.
3. must have a background of technical training, or specific training relating to the procedures for the safe use
and maintenance of the equipment.
Emergency interventions
The following information is of a general nature.
First aid interventions
Company regulations and traditional procedures should be followed for any first aid intervention that may be
required.
Firefighting measures
1. Do not use water to put out a fire, but only fire extinguishers that are suitable for use
with electrical and electronic equipment.
2. If exposed to heat or fire, some products may release toxic fumes into the
atmosphere. Always use a respirator when extinguishing a fire.

0MNA080A55-GB REV 01 page 5 / 75
GENERAL PRECAUTIONS
This manual contains detailed instructions for the use, installation and start-up of the Sentry MPS-HP.
Read the manual carefully before installation. For information on using the SENTRY MPS-HP, the
manual should be kept close at hand and consulted before carrying out any operation on the device.
This device has been designed and manufactured in accordance with the standards for the product, for normal
use and for all uses that may reasonably be expected. It may under no circumstances be used for any purposes
other than those envisaged, or in any other ways than those described in this manual. Any interventions should
be carried out in accordance with the criteria and the time-frames described in this manual.
•The first connection to be made is the connection between the earth conductor and the terminal
with the symbol shown here:
•The SENTRY MPS-HP must not operate without an earth connection.
•The device must be installed and used in compliance with the instructions set out in this text and with the
procedures suggested.
•The operating and maintenance personnel and specialized technicians should be adequately trained in the
safe use and maintenance of the device. They should always operate with due precaution and wear
personal protective equipment (PPE).
•Maintenance must not be carried it inside the SENTRY MPS-HP when it is being powered from the mains
or when the UPS is operating via the battery. For maintenance close the maintenance disconnector SWMB
and open all the other switches. The disconnecting switch or battery fuse located in the battery cabinet
should also be opened. Before carrying out any operation, always measure the voltage with a multimeter
to ensure that there are no dangerous voltages.
•There are dangerous voltages inside the equipment even when the input and battery switches are in the
open position; personnel must wait around ten minutes for the capacitors to discharge before working on
the inside of the SENTRY MPS-HP.
•The specialized technician must comply scrupulously with the following instructions for the installation
and maintenance of the SENTRY MPS-HP:
-use insulated tools.
-observe polarities.
-if the fuses need replacing, replace only with the same type.
-the replaced components must be disposed of in accordance with the legislation in force in the
country of installation.
•Do not deactivate the protection devices or ignore the warnings, precautions and alarms described in this
manual or those shown on data plates on the equipment.
•Promptly replace any danger signals if they should become illegible through usage.
•The UPS must be used only with all side and internal panels duly secured and with the front door closed.
•Under no circumstances may the structure of the equipment, the devices mounted on it, the operating
sequence, etc. be modified, tampered with or altered in any way without first consulting the manufacturers.
•All ordinary and extraordinary maintenance operations must be noted in the appropriate register with the
date, time, type of intervention, operator name and any other useful information.
•Once the maintenance operations have been concluded, a thorough check should be made in order to
ensure that no tools and/or other materials have been left inside the cabinet.

page 6 / 75 0MNA080A55-GB REV 01
•In the event of faults or malfunctions, contact your local distributor or Aros. All repair operations must be
carried out by authorized technicians.
•Under no circumstances must water be used to clean the internal or external electrical parts of the cabinet.
•Do not leave the device exposed to rain or to the elements. The device must be stored and used in premises
that comply with the environmental requirements set out in this user manual.
Instructions for use
The SENTRY MPS-HP is an Uninterruptible Power Supply for professional use in industrial or
commercial environments. Shielded cables must be used for the connection to "REMOTE" and "RS232"
connectors.
Warning
Sale of this product is reserved for competent installers. Installation restrictions or additional measures
may be necessary in order to avoid problems.
No reproduction of any part of this manual, even partial, is permitted without the Aros authorization. The Aros
reserves the right to modify the product described herein, in order to improve it, at any time and without notice.

0MNA080A55-GB REV 01 page 7 / 75
CONTENTS
1. PRELIMINARY OPERATIONS ............................................................................... 9
1.1 Removing the packaging and positioning the device .....................................................9
1.2 Storage............................................................................................................................9
1.3 Handling .......................................................................................................................10
2. INSTALLATION ENVIRONMENT ......................................................................... 11
2.1 Ambient conditions:......................................................................................................11
2.2 Dimensions of the premises .......................................................................................... 11
2.3 Cooling of the premises ................................................................................................ 11
2.4 Air change for battery premises ...................................................................................12
3. SENTRY MPS-HP IN SINGLE CONFIGURATION ............................................. 13
3.1 Set-up of the electrical system ...................................................................................... 13
3.1.1 Input................................................................................................................................................. 13
3.1.2 Selectivity ......................................................................................................................................... 14
3.1.3 Differential....................................................................................................................................... 15
3.1.4 Battery.............................................................................................................................................. 16
3.1.5 Backfeed protection ......................................................................................................................... 16
3.1.6 Emergency power off device (EPO)................................................................................................. 16
3.2 Mains, load and battery connections............................................................................ 17
3.2.1 Input line without neutral................................................................................................................. 18
3.2.2 input and output line without neutral............................................................................................... 19
3.3 Connection of signals and remote commands .............................................................. 20
3.3.1 Parallel (optional) ........................................................................................................................... 20
3.3.2 EPO connector (emergency power off control) ............................................................................... 20
3.3.3 REMOTE COMMANDS AND ALARMS.......................................................................................... 21
3.3.4 RS232............................................................................................................................................... 22
3.3.5 SLOTS 1-2 , the following cards may be inserted (optional):.......................................................... 23
3.3.6 REMOTE ALARMS (2 optional cards) ............................................................................................ 23
3.3.7 MODEM (optional)......................................................................................................................... 23
3.3.8 MULTI I / O (optional) ................................................................................................................ 24
3.3.9 Battery temperature sensor (optional)............................................................................................. 24
3.3.10 Dual Bus System – UGS (optional).................................................................................................. 24
3.3.11 SWOUT and SWMB aux. ................................................................................................................. 24
3.4 Start-up procedure........................................................................................................ 26
3.4.1 Battery operation check ................................................................................................................... 27
3.5 Operating modes...........................................................................................................28
3.5.1 On - line - factory setting -.............................................................................................................. 28
3.5.2 Standby-on / Smart active ................................................................................................................ 28
3.5.3 Standby-off (with mains present the load is not powered).............................................................. 29
3.5.4 Stabilizer (operation in on-line mode without battery)................................................................... 29
3.5.5 Frequency converter (from 50 to 60Hz or vice versa)..................................................................... 29
3.6 Personalizations ...........................................................................................................30
3.7 Procedure to transfer the load from UPS onto maintenance by-pass..........................30
3.8 UPS and load shutdown ...............................................................................................31
3.9 Block diagram...............................................................................................................32
3.10 Components of the block diagrams ..............................................................................33
4. SENTRY MPS-HP IN PARALLEL CONFIGURATION ........................................... 35
4.1 Introduction ..................................................................................................................35

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4.2 Electrical system set-up................................................................................................ 36
4.2.1 Input................................................................................................................................................. 36
4.2.2 Differential ...................................................................................................................................... 36
4.2.3 Emergency power off device (EPO) ................................................................................................ 36
4.2.4 External maintenance by-pass......................................................................................................... 37
4.3 Mains, load and battery connections. .......................................................................... 38
4.3.1 UPS AC input / output power connection........................................................................................ 38
4.3.2 Power connections battery side....................................................................................................... 39
4.4 Connection of signals ................................................................................................... 40
4.5 Start-up procedure ....................................................................................................... 43
4.6 Operating modes .......................................................................................................... 44
4.7 By-pass for maintenance .............................................................................................. 46
5. SIGNAL PANEL FUNCTIONS .............................................................................. 50
5.1 General description...................................................................................................... 50
5.2 Signal messages............................................................................................................ 51
5.3 Alarm messages............................................................................................................ 51
5.4 Control panel menu...................................................................................................... 54
5.4.1 Basic menu....................................................................................................................................... 54
5.4.2 Language setting ............................................................................................................................. 55
5.4.3 Measurements.................................................................................................................................. 56
5.4.4 Times Measurement......................................................................................................................... 56
5.4.5 Menu key 3 "key", Controls ............................................................................................................. 57
5.4.5.1 Keys menu 3, 2 : battery test ................................................................................................. 57
5.4.5.2 PERSONALIZATIONS ......................................................................................................... 58
5.4.5.3 Keys menu 3, 5 : CODE 436215 ............................................................................................ 58
5.4.5.4 RATED OUTPUT VOLTAGE. ............................................................................................. 59
5.4.5.5 BATTERY.............................................................................................................................. 59
5.4.5.6 PRE-ALARM ......................................................................................................................... 60
5.4.5.7 AUTO-OFF "VA" ................................................................................................................ 62
5.4.5.8 AUTO-OFF Timer.................................................................................................................. 62
5.4.5.9 BY-PASS VOLTAGE FIELD................................................................................................ 63
5.4.5.10 BY-PASS FREQUENCY FIELD. ......................................................................................... 63
5.4.5.11 MODEM................................................................................................................................. 63
5.4.5.12 "DIAL /SEND" MODEM....................................................................................................... 64
5.4.5.13 RS232 ..................................................................................................................................... 64
5.4.5.14 ECHO. .................................................................................................................................... 64
5.4.5.15 IDENT. ................................................................................................................................... 65
5.4.5.16 OPERATION IN STANDBY-ON ......................................................................................... 65
5.4.5.17 SMART ACTIVE OPERATION ........................................................................................... 65
5.4.5.18 INVERTER-OFF/BY-PASS .................................................................................................. 65
5.4.5.19 TOTAL BLOCK .................................................................................................................... 66
5.4.6 "RECORDER": RECORDED EVENTS........................................................................................... 66
5.4.6.1 RECORDED VOLTAGES MEASUREMENTS ................................................................... 66
5.4.6.2 RECORDED CODES............................................................................................................. 66
5.4.7 EXCLUDING THE ACOUSTIC ALARM ........................................................................................ 67
5.4.8 "CLOCK": DATE/TIME.................................................................................................................. 67
5.4.9 "ARROW DOWN": INTERNAL CODES......................................................................................... 67
6. MAINTENANCE................................................................................................. 68
7. GENERAL CHARACTERISTICS ........................................................................... 71
8. APPENDIX A-REMOTE COMMANDS AND ALARMS CARD -................................ 74

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1. Preliminary operations
1.1 Removing the packaging and positioning the device
On delivery, the packaging must be inspected to ensure that it is whole and that it has not been crushed or dented.
Check in particular that neither of the two impact resistant devices on the packaging is red; if one of them is red,
follow the instructions on the packaging.
The essential details of the device are provided on the shipping document. The marking, weight and dimensions of
the various items making up the packing list are shown.
Check the state of the device by means of a visual inspection of both the inside and the outside. Any dents seen
mean that it has suffered knocks during shipping, which could compromise the normal operation of the device.
1.2 Storage
In the following situations:
- installation not immediately after delivery;
- de-installation and storage while awaiting relocation,
place the device in covered premises that are protected from direct contact with atmospheric agents and dust. The
following environmental values are those allowed in the storage area:
Temperature: -25 ÷ + 75 °C
Relative humidity: 30÷95 % max.

page 10 / 75 0MNA080A55-GB REV 01
For the installation of a battery cabinet, if provided with the uninterruptible power supply, follow the
instructions given in the specific manual.
The list of material provided may vary depending on the order specifications. As a general rule, the packaging
should include the following: this manual, the installation drawing, the warranty and eventual accessories.
1.3 Handling
The equipment must only be handled by adequately trained personnel. It can be unloaded from the vehicle and put
into place by lifting the box or the wooden deck to which the equipment is secured with a fork-lift truck. A
transpallet or fork-lift truck should be used for the permanent positioning of the equipment, in accordance with the
instructions provided below.
1Insert the forks of the fork-lift truck in the lower part of the device, from the front or back, and ensure
that they stick out about 30 cm on the other side.
If a transpallet is used, raise the device only as much as is strictly necessary.
2Secure the device to the transpallet or fork-lift before moving it.
Risk of overturning
In order to avoid the risk of the device overturning, ensure that it is firmly secured to the transpallet or
fork-lift truck by means of appropriate ropes before moving it.
When being moved the cabinet should be handled with care; knocks or drops can damage it. Once in position,
remove the packaging carefully in order not to scratch the device.
The packaging should be removed as follows:
1. Cut the bands
2. Carefully remove the cardboard packaging.
3. Remove the screws securing the cabinet to the wooden base.
4. If using a transpallet, remove the device from the pallet and set it on the floor, using the same
precautions as set out in the section on Handling.

0MNA080A55-GB REV 01 page 11 / 75
2. Installation environment
The SENTRY MPS-HP and the battery cabinet have been designed for indoor installation. The choice of premises
for installation should comply with the points set out below.
2.1 Ambient conditions:
•ensure that the floor can support the weight of the SENTRY MPS-HP and of any battery cabinet that
may be used;
•avoid dusty environments;
•avoid narrow environments that could hinder normal maintenance operations;
•avoid placing the device in areas exposed to direct sunlight or heat;
•ensure that the ambient temperature conforms to the following:
minimum operating temperature: 0 °C
maximum temperature for 8 hours a day: + 40°C
average temperature for 24 hours: + 35°C
2.2 Dimensions of the premises
For the mechanical dimensions of the cabinets, refer to the “INSTALLATION DRAWINGS” supplied with the
UPS and with the battery cabinet, if present. These drawings provide the following data:
•the position of the holes in the base to secure the device to the floor, if applicable;
•the view of the floor support for the sizing of a structure to raise the cabinet, if applicable;
•the position of cable entry;
•the position of the fans on the top of the UPS, for the positioning of a structure to convey the warm air
discharged by the equipment outside the premises, if applicable;
•the input, output and battery cables section;
•the power dissipated by the equipment (kW).
2.3 Cooling of the premises
N.B.: the recommended operating temperature for the lifetime of the UPS and of the batteries is between 20 and
25°C. The lifespan of the battery depends on the operating temperature; with an operating temperature of between
20°C and 30°C, the lifespan of the batteries is halved.
A heat dissipation system is required to keep the temperature of the premises housing the equipment within the field
20÷25°C.
The heat dissipation needed for the correct operation of the UPS is
brought about by the air current made by the fans located inside the
UPS (forced convection) and by the air around the side panels
(natural convection).

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In order to ensure proper air circulation, and therefore the correct operation of the UPS, measures must be taken
during installation to avoid any obstructions to the free circulation of air. These include the following:
•ensure a distance of at least 60 centimetres from the ceiling, so as not to hinder air extraction,
•leave a free space of at least one metre at the front of the equipment to ensure both the circulation
of the air and installation and maintenance operations;
•With natural convection the thermal load is dissipated to the outside through the walls; thus a
cabinet placed against a wall or in a hollow dissipates less heat than one located in a free
environment.
The following rule must be observed:
leave at least one of the three side walls free: right, left or back.
•the side strips must not be mounted for installations where cabinets are placed side by side.
2.4 Air change for battery premises
The premises housing the battery cabinet must have sufficient air circulation to ensure that the concentration of
hydrogen issued during battery charging is kept below the danger limit.
The air change in the premises should preferably be provided by natural ventilation, otherwise by forced ventilation.
The standard EN 50272-2 for air change envisages that the minimum opening must satisfy the following equation:
A = 28 x Q = 28 x 0.05 x n x Igas x C10 (1/10³) [cm²]
where: A = free opening for air intake and outlet
Q = flow of air to be removed [m³/h]
n = number of battery elements;
C10 = battery capacity over 10 hours [Ah]
Igas = current that produces gas [mA//Ah]
in accordance with the standard: Igas = 1 VRLA type battery (*)
(*) for open vase or nickel batteries, contact the battery manufacturer.
When the equation is applied for 40 hermetically-sealed lead batteries:
A = 56 x C10 / 10³ [cm²]
When using 120Ah batteries, the minimum aperture should be:
A = 6.7 [cm²]
The air intake and outlet must be positioned to ensure the best possible circulation; for example:
- apertures on opposite walls,
- a minimum distance of 2 m when they are on the same wall.

0MNA080A55-GB REV 01 page 13 / 75
3. SENTRY MPS-HP in single configuration
3.1 Set-up of the electrical system
3.1.1 Input
The UPS input must have a max. current protection device for the section of line coming from the distribution panel
as well as for the two inputs into the SENTRY MPS-HP: the rectifier line and the by-pass line.
The protection device should be sized according to the situation, as follows:
a) Single power line
The fuse represented with the letter F alone provides the protection for all three lines mentioned above.
b) main power supply and separate by-pass
When there are two separate power lines, the main power line and the by-pass line, two protection devices must be
provided (indicated with the letters Fand Gin the drawing b), one for each line.
+/-
SWBY
SWOUT
SWMB
UPS
F
SWIN
SWIN
SWBY
SWOUT
SWMB
UPS
+/-
G
F

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- table of connections-
100kVA 120kVA 160kVA 200kVA 250kVA
Power line
Imax (*) [A] 145 173 229 288 359
External fuse type gG [A] 160 200 250 315 400
BYPASS (**)
Current [A] 145 173 231 289 361
External fuse type gG [A] 160 200 250 315 400
OUTPUT
Current [A] 145 173 231 289 361
BATTERY
Permanent battery eq. Current [A] 200 240 320 400 495
(*)100% load, minimum input voltage, battery charging; (**) inside the UPS, no max. current protection device is provided on
the by-pass line, this protection must be provided in the system;
3.1.2 Selectivity
The system where the UPS is inserted must be set up in such a way that in the event of a shortcircuit on one of the
lines downstream of the UPS, the fuse on the output will be triggered rather than the fuse located at the UPS input.
This is known as selectivity, and ensures that the remaining feeders maintain the power supply.
In order to select the correct protection devices to be inserted downstream of the SENTRY MPS-HP, the following
two operating modes have to be taken into consideration: mains power supply and battery power supply.
With mains power supply the output fuse must be selective with the input fuse; the condition is verified for the
following values:
100kVA 120kVA 160kVA 200kVA 250kVA
rated output current: [A] 145 173 231 289 361
type gG fuse used at the UPS input
(as shown in the table of connections) [A] 160 200 250 315 400
maximum fuse at the UPS output for selectivity:
fuse size for type gG fuse [A] 100 125 160 200 250
fuse size for type aM fuse [A] 63 80 125 125 160
At least two feeders are necessary in order to use the UPS at rated load with fuses of type gG.
UPS
F
H

0MNA080A55-GB REV 01 page 15 / 75
With battery power supply ( first fault) in the event of a shortcircuit on one of the outputs (second fault) it must be
possible for the fuse to be triggered before the inverter shuts down.
If the shortcircuit is of the three-phase type, the inverter can supply a current for 1 second that is 1.8 times the value
of the rated current of the UPS output (with a single phase shortcircuit the current is around 3 times the value).
In the worst-case scenario, that is a three-phase shortcircuit then a smaller current, the condition occurs if:
100kVA 120kVA 160kVA 200kVA 250kVA
rated output current: [A] 145 173 231 289 361
shortcircuit current (three-phase) 1.5 times the rated output current for 1 second
maximum fuse at the UPS output for selectivity:
fuse size for type gG fuse [A] 40 40 63 63 80
fuse size for type aM fuse [A] 20 25 32 50 50
At least five feeders are necessary in order to use the UPS at rated load with fuses of type gG.
To sum up, when there is a shortcircuit on the output, there are two alternatives if only the line affected by the
shortcircuit is to be isolated; let us consider the example of the 200kVA:
selectivity with both mains power supply and battery power supply;
the load has to be shared between at least five feeders, each sized at 20% of the rated power.
selectivity, with mains power supply only:
since it is considered unlikely that after a first fault a second fault will occur in the limited time of
operation from the battery, it is sufficient to share the output between two lines, each sized for 50% of the
rated power.
3.1.3 Differential
If the SENTRY MPS-HP protection against electric shock uses differential current devices, these have to have the
following characteristics:
-minimum differential current 300mA
-sensitive direct current and unidirectional components (class A or class B)
-protected against spurious tripping;
-delay greater than or equal to 0.1 s.
neutral
In the standard version without isolating transformer on the by-pass line, the neutral from the mains power
supply is connected to the output neutral of the UPS.
THE ELECTRICAL SYSTEMS UPSTREAM AND DOWNSTREAM OF THE UPS ARE EXACTLY
THE SAME
In operation with mains voltage, a differential switch inserted on the input is triggered because the output circuit is
not isolated from the input circuit. In operation without mains voltage (battery power supply), the input differential
only cuts in if it is able to trigger because of the fault current without voltage at its ends (for example, not the
differential with auxiliary relay).
Other differential switches can always be inserted on the output, and should preferably be coordinated with the
switches on the input.

page 16 / 75 0MNA080A55-GB REV 01
3.1.4 Battery
Battery cabinet
For connection to the UPS, the battery cabinet must have an overcurrent protection device and a
disconnecting device.
The disconnector may be closed only when the UPS is started up regularly; see the section “Start-up
procedure” on page 26.
The function of the fuses is to protect the batteries and the cables from a shortcircuit between the battery cabinet and
the UPS. The following rules should be observed for their sizing:
•if rapid fuses of the type gl / gG are installed: the maximum size of fuse to be used is 2 times the
battery capacity in Ah.
•If ultra rapid fuses of the type aR are installed: the maximum size of fuse to be used is 2.5 times
the battery capacity in Ah.
For example: the following fuses may be used for batteries of the type 150Ah: 250A type gl/gG or 315A type aR.
3.1.5 Backfeed protection
The SENTRY MPS-HP is provided with a device to prevent voltage backfeed on the input line due to an internal
fault. This protection device works by switching off the inverter if the current flow is faulty, thereby causing voltage
backfeed on the by-pass line during operation from the inverter. If the fault occurs when the UPS is operating from
the battery, the load will not be powered.
Should it be required to avoid the shutting down of the inverter in order to keep the load powered by the inverter
even in the event of a double fault, the system can be customized to control the opening coil of a switch located
upstream by reprogramming one of the relays on the “REMOTE COMMANDS AND ALARMS” card.
The control logic allows the function of the relay to be reconfigured, for example for the backfeed alarm, and then
the free voltage contact can be used to control the triggering of a switch located on the UPS input.
3.1.6 Emergency power off device (EPO)
The UPS is pre-set to be connected to a remote emergency power off device as laid down in standard EN 62040-1-
2. If the remote device (not supplied with the equipment) is activated, the inverter output voltage is cut.
The connection procedure is shown below.

0MNA080A55-GB REV 01 page 17 / 75
a - EPO terminal board located on the UPS
b - EPO switch with auxiliary contacts (not provided).
On the SENTRY MPS-HP, the jumper on the EPO terminals (page 20) must be removed, and the wires from the
auxiliary contact of the button must be connected in place of the jumper.
The contact must be closed with the button in the rest position and must open when the button is pressed.
3.2 Mains, load and battery connections
The operations described in this chapter must be carried out exclusively by a specialized technician.
The first connection to be made is the earth conductor.
The SENTRY MPS-HP MUST NOT OPERATE WITHOUT AN EARTH CONNECTION
Before making the connection, open all the switches on the device and ensure that the UPS is completely isolated
from the power sources: battery and AC power line. More specifically, check that:
- the UPS input line or lines are completely isolated;
- the battery cabinet disconnector / fuse (if present) is open;
- all the UPS disconnectors - SWIN, SWBY, SWOUT and SWMB - are in the open position (position 0);
- check with a multimeter that there are no dangerous voltages on the terminal board.
For connection of the power cables to the terminal boards, refer to the “INSTALLATION DRAWINGS”
provided with the UPS and with the battery cabinet, if present.
Input neutral
The power supply to the SENTRY MPS-HP input (by-pass line) must be three-phase with neutral.
The neutral conductor is necessary only on by-pass line.
UPS
a
b

page 18 / 75 0MNA080A55-GB REV 01
3.2.1 Input line without neutral
The transformer must be inserted either on the mains supply line or on the by-pass line (as shown in the drawings).
-Single power line without neutral
-main power supply and separate by-pass without neutral
MAINS LINE
UPS
LOAD
3Ph+N
or
OPTIONAL
MAINS LINE
UPS
LOAD
3Ph+N
BY-PASS LINE
or
OPTIONAL

0MNA080A55-GB REV 01 page 19 / 75
3.2.2 input and output line without neutral
If the input line and the load are three-phase without neutral type (and only in this case), a kit to create
the signal neutral (optional) may be used. The kit may only be used by a specialized technician.
BATTERY CABINET if present:
The battery cabinet must be provided with a sectioning device to be connected to the UPS.
This disconnector must be closed only when the UPS is started up regularly. During connection to the
UPS the disconnector must stay in the open position.
Up to 5 battery cabinets can be connected in parallel, in accordance with the diagram below.
Cabinet disconnector
For systems with 3 or more battery cabinets (up to 5 units), use a cabinet with a disconnector where the
cables can be parallel-connected (refer to the marketing department). For the sizing of the cables and
connection procedures, refer to the “INSTALLATION DRAWING” attached to the battery cabinet.
For back-up times requiring a greater number of Battery cabinets, contact the marketing department.
Cabinet
disconnector
MAINS LINE
UPS
LOAD
3Ph
OPTIONAL

page 20 / 75 0MNA080A55-GB REV 01
3.3 Connection of signals and remote commands
In order to access the interface cards, open the door and remove the protection panel secured with screws (K) as
shown in the drawing:
A- PARALLEL (optional)
B- EPO (emergency power off control)
C- REMOTE COMMANDS AND ALARMS
D- RS232-2
E- RS232-1
F- SLOT 1 (main)
G- SLOT 2 (aux)
H- REMOTE ALARMS (optional)
I- REMOTE ALARMS (optional)
L- MODEM (optional) or MULTI I/O (optional)
M- BATTERY TEMPERATURE SENSOR (optional)
N- UGS (optional)
P- SWOUT aux
Q- SWMB aux
3.3.1 Parallel (optional)
-A- To be used for the connection of UPSs in parallel configuration. See the chapter “parallel version” on page 35.
3.3.2 EPO connector (emergency power off control)
-B- If the jumper on the connector is opened, the voltage on the UPS output will be cut.
The UPS is factory-fitted with the EPO terminals shortcircuited. If this input is used, the UPS can be shut down in a
hazardous situation from a remote position simply by pressing a button.
If only the power supply is removed, for example by opening the switch of the power supply panel, the UPS will
keep the load powered using the energy in the batteries.
FG
E
D
B
C
N
A
L
I
K
H
P
M
Q