Salicru SLC CUBE4 User manual

7,5 - 20 kVA
UNINTERRUPTIBLE POWER SUPPLY
USER MANUAL

2SALICRU
General index
1. INTRODUCTION
1.1. THANK-YOU LETTER
2. SAFETY INFORMATION
2.1. USING THIS MANUAL
2.1.1. Conventions and symbols
2.1.2. Safety considerations
3. QUALITY ASSURANCE AND STANDARDS
3.1. MANAGEMENT STATEMENT
3.2. STANDARDS
3.2.1. First and second environment
3.2.1.1. First environment
3.2.1.2. Second environment
3.3. ENVIRONMENT
4. PRESENTATION
4.1. VIEWS OF THE CABINETS
4.1.1. UPS cabinets
4.1.2. Battery cabinets
4.2. PRODUCT DEFINITION
4.2.1. UPS and battery module nomenclature
4.3. UPS CHARACTERISTICS LABEL
4.4. UPS DESCRIPTION
4.4.1. General description and block diagram
4.4.2. Rectifier-booster
4.4.3. Inverter
4.4.4. Batteries and battery charger
4.4.5. Static bypass
4.4.6. Manual or maintenance bypass
4.4.7. Input-output configurations
4.5. OPERATING MODES
4.5.1. Normal mode.
4.5.2. Battery mode
4.5.3. Bypass mode
4.5.4. Maintenance bypass mode
4.5.5. ECO mode
4.5.6. Frequency converter mode
4.5.7. Standby mode
4.6. OPERATION AND CONTROL DEVICES
4.6.1. Switches
4.6.2. Control panel with touchscreen
4.6.3. External interface and communications
4.6.3.1. Digital inputs, relay interface and communications
4.6.3.2. Manual bypass auxiliary contact terminals (EMBS)
4.6.3.3. EPO (Emergency Power Off) terminals
5. INSTALLATION
5.1. RECEPTION.
5.1.1. Reception, unpacking and contents
5.1.2. Storage
5.1.3. Unpacking
5.1.4. Transport to the site
5.1.5. Siting, immobilisation and considerations
5.1.5.1. Siting for single units
5.1.5.2. Siting for parallel systems
5.1.5.3. Immobilisation and levelling of the unit
5.1.5.4. Preliminary considerations before connection
5.1.5.5. Preliminary considerations before connection, regarding
the batteries and their protection devices
5.2. CONNECTIONS
5.2.1. Connection to the mains, input terminals
5.2.2. Connection of the separate static bypass line. CUBE4 B
version.
5.2.3. Connection of the output, output terminals
5.2.4. Connection of the unit's battery terminals to those of the
battery module (Fig. 31).
5.2.5. Connection of the parallel bus
5.2.6. Installation of SNMP cards
6. OPERATION
6.1. UPS START-UP
6.1.1. Checks before start-up
6.1.2. Initial start-up
6.1.3. Generic start-up procedure (normal mode)
6.1.4. UPS start-up without mains power – Cold Start (battery
mode)
6.1.5. Procedure for transferring to bypass mode
6.2. PROCEDURE FOR STOPPING THE UPS
6.3. MANUAL OR MAINTENANCE BYPASS
6.3.1. Transferring to maintenance bypass mode
6.3.2. Transferring back to normal mode (from maintenance
bypass mode)
6.4. EMERGENCY STOP (EPO)
6.4.1. Activation of the emergency stop (EPO)
6.4.2. System restoration after an emergency stop (EPO)

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USER MANUAL SLC CUBE4 7.5 kVA to 20 kVA - UNINTERRUPTIBLE POWER SUPPLY-
7. CONTROL PANEL
7.1. HOME MENU OR MAIN SCREEN
7.1.1. Contents of the main screen information
7.1.2. Map of screens from the main screen
7.2. CONTROL MENU
7.3. MEASUREMENTS MENU
7.4. SETTINGS MENU
7.4.1. GENERAL configuration
7.4.2. ADVANCED configuration - Password
7.4.2.1. Advanced user configuration menu
7.5. INFO MENU
7.6. DATA LOG MENU
7.6.1. Log submenu
7.7. AC OUS TIC A L ARM
7.8. ALARM, ALERT AND EVENT TABLES
7.8.1. UPS alarm table
7.8.2. UPS warning table
7.8.3. UPS event table
8. MAINTENANCE, WARRANTY AND SERVICE
8.1. BATTERY MAINTENANCE
8.1.1. Notes for installing and replacing the batteries
8.2. WARRANTY CONDITIONS
8.2.1. Warranty terms
8.2.2. Exclusions
8.3. TECHNICAL SERVICES NETWORK
9. ANNEX I. SETTINGS AND OPERATING
MODES
10. ANNEX II. DETAILS OF CONNECTION
TERMINALS AND CONNECTIONS FOR
ALL INPUT-OUTPUT CONFIGURATIONS
AVAILABLE
11. ANNEX III. TECHNICAL SPECIFICATIONS
11.1. INTERNATIONAL STANDARDS
11.2. ENVIRONMENTAL CHARACTERISTICS
11.3. MECHANICAL CHARACTERISTICS
11.4. ELECTRICAL CHARACTERISTICS
11.4.1. Electrical characteristics (rectifier input)
11.4.2. Electrical characteristics (bypass input)
11.4.3. Electrical characteristics (battery charger)
11.4.4. Electrical characteristics (inverter output)
11.4.5. Communications
11.4.6. Efficiency
12. ANNEX IV. CONNECTIVITY
12.1. REGISTRATION OF THE UNIT IN THE CLOUD
12.1.1. Nimbus portal
12.1.2. Reading the QR code
12.2. GENERAL TECHNICAL SPECIFICATIONS

4SALICRU
SALICRUSALICRU
1. INTRODUCTION
1.1. THANK-YOU LETTER
We would like to thank you for purchasing this product. Read
this instruction manual carefully in order to familiarise yourself
with its contents. You will get the most out of the unit, achieve
a higher the degree of satisfaction and guarantee high levels of
safety the more you understand the unit.
Please do not hesitate to contact us for any further information
or any questions you may have.
Yours sincerely,
•The unit described in this manual can cause serious
physical injury if handled incorrectly. Therefore, the
unit must only be installed, serviced and/or repaired by our
staff or by qualified personnel.
•Although every effort has been made to guarantee that the
information in this user manual is complete and accurate,
we are not responsible for any errors or omissions that may
be present.
The images included in this document are for illustrative
purposes only and may not accurately represent the parts
of the unit shown in this manual, therefore they are not
contractual. However, any differences will be reduced or
resolved through the correct labelling on the unit.
•In line with our policy of continuous development, we
reserve the right to modify the specifications, oper-
ating principle or actions described in this document
without prior notice.
Consequently, the contents of this manual may differ from
the latest version available on our website. Check that you
have the latest revision of the document (indicated on the
back cover, on our brand logo) and if not, download it from
the website.
•The reproduction, copying, transfer to third parties,
modification or translation in full or in part of this
manual or document, in any form or by any means, without
prior written consent from our company, is prohibited,
with us reserving the full and exclusive right of ownership
to it.

5
USER MANUAL SLC CUBE4 7.5 kVA to 20 kVA - UNINTERRUPTIBLE POWER SUPPLY-
2. SAFETY INFORMATION
2.1. USING THIS MANUAL
The latest version of the unit's user manual can be downloaded byThe latest version of the unit's user manual can be downloaded by
customers from our websitecustomers from our website (www.salicru.com)(www.salicru.com). It must be read. It must be read
carefully before carrying out any action, procedure or operation oncarefully before carrying out any action, procedure or operation on
the unit.the unit.
The purpose of the SLC.CUBE4 documentation is to provide
information relating to safety, as well as explanations about
the unit's installation and operating procedures. The generic
documentation for the unit is supplied in digital format on a
CD-ROM/pen drive and includes, among other documents, the
system user manual itself..
Document EK266*08 relating to the "Safety instruc-
tions" is supplied with the unit. Compliance with
these is mandatory, with the user being legally
responsible for their observance and application.
All units are supplied with the corresponding labels to guar-
antee the correct identification of each part. In addition, the
user can refer to the user manual at any time during installation
or start-up operation, which provides clear, well-organised and
easy-to-understand information.
Nevertheless and as the product is continuously being de-
veloped, there may be slight discrepancies or inconsisten-
cies. Therefore, in the case of any queries, the labels on
the unit itself will always take precedence.
Once the unit is installed and in operation, we recommend that
you keep all of the documentation in a safe place, in case of any
future queries that may arise.
This user manual is intended for units from the SLC CUBE4 series,
of between 7.5 and 20 kVA and consisting of cabinets measuring
(depth x width x height) 688.5 x 250 (370 (1)) x 826.5 mm.
(1) Dimensions corresponding to the unit with the stabilising
supports installed. For safety purposes, it is recommended
to install them to give the unit greater stability, largely avoiding the
risk of tipping (see ).
The following terms are used interchangeably in the document
to refer to:
•"SLC CUBE4, CUBE4, UPS, system, equipment or
unit".- Uninterruptible power supply, CUBE4 series.
Depending on the context of the sentence, they may refer
interchangeably to the UPS itself or to the UPS and the bat-
teries, regardless of whether it is assembled in the same
metal enclosure -box- or not.
•"Batteries or capacitor banks".- A group or set of ele-
ments that stores the flow of electrons by electrochemical
means.
•"T.S.S.".- Technical Service and Support.
•"Customer, installer, operator or user".- They are used
interchangeably and, by extension, to refer to the installer
and/or the operator who will carry out the corresponding
actions, whereby the responsibility for carrying out the
respective actions may be held by the same person when
they act on behalf or in representation of the installer or
operator.
2.1.1. Conventions and symbols
Some symbols may be used and may appear on the unit, bat-
teries and/or in the user manual.
For more information, see section 1.1.1 of document EK266*08
relating to the "Safety Instructions".
When there are differences in relation to the safety instructions
between document EK266*08 and the unit's user manual, those
from the latter will always prevail.
2.1.2. Safety considerations
•Although chapter will cover safety-related considerations
in more detail, the following will be taken into account:
Inside the battery cabinet there are accessible parts
with DANGEROUS VOLTAGES and consequently with a
risk of electric shock, which is why it is classified as a
RESTRICTED ACCESS AREA. Therefore the key for the
battery cabinet will not be available to the OPERATOR
or USER, unless they have been properly instructed.
In the event of an intervention inside the battery cab-
inet, either during the connection, preventive mainte-
nance or repair procedure, it must be taken into account
that the battery group voltage exceeds 200 V DC
and therefore the relevant safety measures must be
taken.
Any connection and disconnection operation of the ca-
bles or handling inside the cabinet must not be carried
out until 10 minutes have passed, in order to allow the
internal discharge of the unit's capacitors. Even so, use
a multimeter to check that the terminal voltage is less
than 36 V.
In case of installing the equipment in IT neutral regime,
the switches, circuit breakers and thermal-magnetic
protection devices must break the NEUTRAL, as well
as the three phases.

6SALICRU
The EC declaration of conformity for the product is
available for the customer and can be requested from
our head office.
3.2.1. First and second environment
The following environment examples cover most UPS installa-
tions.
3.2.1.1. First environment
This environment includes residential, commercial and light
industry installations, connected directly without intermediate
transformers to a public low-voltage power supply network.
3.2.1.2. Second environment
This environment includes all commercial, light industry and
industrial establishments that are not directly connected to a
low-voltage power supply network supplying buildings used for
residential purposes.
3.3. ENVIRONMENT
This product has been designed with the protection of the en-
vironment in mind and has been manufactured in accordance
with the ISO 14001 standard.
Recycling the unit at the end of its useful life:
Our company commits to using the services of approved com-
panies that comply with the regulations in order to process the
recovered product at the end of its useful life (please contact
your distributor).
Packaging:
To recycle the packaging, follow the applicable legal regula-
tions, depending on the particular standards of the country
where the unit is installed.
Batteries:
The batteries represent a serious health and environmental
risk. They must be disposed of in accordance with the appli-
cable laws.
3. QUALITY ASSURANCE AND STANDARDS
3.1. MANAGEMENT STATEMENT
Our aim is to satisfy our customers. Management has estab-
lished a Quality and Environmental Policy for such purposes. As a
result, a Quality and Environmental Management System will be
implemented, which will ensure that we are compliant with the
requirements of the ISO 9001 and ISO 14001 standards and that
we meet all customer and stakeholder requirements.
The company management is also committed to the develop-
ment and improvement of the Quality and Environmental Man-
agement System, through:
•Communication to the entire company of the importance of
satisfaction, both in terms of the customer’s requirements, as
well as legal and regulatory requirements.
•Dissemination of the Quality and Environmental Policy and
setting of the Quality and Environment targets.
•Management reviews.
•Provision of the necessary resources.
3.2. STANDARDS
The SLC CUBE4 product is designed, manufactured and mar-
keted in accordance with the EN ISO 9001 Quality Assurance
standard. The mark indicates conformity with the EEC Direc-
tives through application of the following standards:
•2014/35/EU. - Low voltage directive.
•2014/30/EU. - Electromagnetic compatibility (EMC).
•2011/65/EU. - Restriction of hazardous substances in elec-
trical and electronic equipment (RoHS).
According to the specifications of harmonised standards. Ref-
erence standards:
•EN-IEC 62040-1. Uninterruptible power systems (UPS).
Part 1-1: General and safety requirements for UPS used in
user access areas.
•EN-IEC 62040-2. Uninterruptible power systems (UPS).
Part 2: Electromagnetic compatibility (EMC) requirements.
The manufacturer shall not be held responsible for any
damage caused by the user after altering or tampering with
the unit in any way.
WARNING!:
This is a C3 category UPS. This is a product for commer-
cial and industrial application in the second environment;
installation restrictions or additional measures may be
necessary to avoid disturbances.
This unit is not suitable for use in basic life support
(BLS) applications, whereby a fault in the unit could
prevent the life support machine from working or could
significantly affect its safety or effectiveness. Likewise,
it is not recommended for medical applications, com-
mercial transport, nuclear installations, or other appli-
cations or loads, whereby a fault in the product could
lead to personal injury or material damage.

7
USER MANUAL SLC CUBE4 7.5 kVA to 20 kVA - UNINTERRUPTIBLE POWER SUPPLY-
4. PRESENTATION
4.1. VIEWS OF THE CABINETS
4.1.1. UPS cabinets
The power range between 7.5 and 20 kVA consists of a UPS
cabinet measuring 826.5 mm in height.
Fig. 1 and Fig. 2 show front and rear views and their constituent
parts.
LCD synoptic
Wheel
Wheel brake
Stabilising
supports
Fans
Output earth (T)
Input earth (T)
Parallel connectionIntelligent slot EMBS
RS232
INPUT signal
OUTPUT signal
External battery
terminals
Input circuit
breaker (Q1)
Output discon-
nect switch (Q2)
Bypass circuit breaker
(Q4)
Manual bypass
switch (Q5) (with
mechanical lock)
USB
EPO
ONON
ON
OFF
OFF
OFF
R S T N N R TS U V W N N
INPUT –OUTPUT +BYPASS INPUT
Cable glands
Connection terminals
(see Detail A, Fig. 2)
+ N –
Fig. 1. Front and rear views (without the terminal cover)
of the SLC CUBE4 series 7.5 to 20 kVA cabinet.

8SALICRU
Detail A
Input terminals
R, S, T, N
Input earth
terminal
Output earth
terminal
Bypass termi-
nals N, R, S, T
Output termi-
nals U, V, W, N
Fig. 2. Detailed view of connection terminals.
In the standard unit, the bypass line is connected inter-
nally to the rectifier, being common to the input line. In
this case, there is a label that covers the silk-screen printing of
the bypass input to indicate that the bypass terminals are not
connected/available (see detail Fig. 26). Annex II shows the
other possible input/output configurations.
4.1.2. Battery cabinets
There are 2 battery cabinet sizes for all available UPS power
outputs (depth x width x height): 577.2 x 250 x 576.5 mm and
800 x 250 (371.6 taking the stabilising elements into account) x
836.5 mm and (see Fig. 3 and Fig. 4).
Battery input
terminals
Battery output
terminals
Earth terminal (T)
Battery fuses (F8)
+ N – + N –
Wheel brake
Fig. 3. Front and rear views of the battery cabinet meas-
uring 576.5 mm in height.

9
USER MANUAL SLC CUBE4 7.5 kVA to 20 kVA - UNINTERRUPTIBLE POWER SUPPLY-
Battery disconnect
Battery fuses (F8)
Immobiliser
Stabilising support
Battery input
terminals
Battery output
terminals
Earth terminal (T)
+ N –
+ N –
Fig. 4. Front and rear views of the battery cabinet meas-
uring 836.5 mm in height.

10 SALICRU
4.2. PRODUCT DEFINITION
4.2.1. UPS and battery module nomenclature
KIT SLC-10-CUBE4-LBT B1 Q 0/44AB147 T/T AWCO EE666502
KIT MOD BAT CUBE4 0/2x44AB999 100A BC AWC0 EE666502
EE* Special customer specifications.
CO "Made in Spain" marking on the UPS and packaging (for customs).
W Generic brand unit. The SALICRU brand does not appear on
covers, manuals, packaging, etc.
A Unit for three-phase networks from 3x200 to 3x220 V.
T/T Triangle/triangle unit.
147 Last three digits of the battery code (units with non-standard
autonomy batteries).
AB Letters of the battery family (units with non-standard autonomy
batteries).
44 Number of batteries in a single branch (units with non-standard
autonomy batteries).
0/ Unit prepared for the autonomy or batteries requested.
/ No factory-installed batteries but with the necessary acces-
sories for installing them. Batteries are supplied separately.
Q Group of 2 languages (English, Spanish, Catalan and Portuguese).
B1 Unit with external batteries for non-standard autonomy.
BC Unit prepared for common battery bank (parallel systems of
two units).
– Omit for standard autonomy (only for internal batteries in the
unit's cabinet).
T Top cable entry.
B Separate bypass line.
SB UPS without bypass line.
L Input/output, single-phase/single-phase configuration.
MB Input/output, single-phase/three-phase configuration.
NB Input/output, three-phase/single-phase configuration.
– Input/output, three-phase/three-phase configuration.
CUBE4 UPS series.
10 Power in kVA.
SLC UPS or frequency converter with batteries.
CF Frequency converter.
KIT Only for "/" units as the batteries are not installed in the
units and it is treated as a KIT.
EE* Special customer specifications.
CO "Made in Spain" marking on the UPS and packaging (for customs).
W Generic brand unit.
A Battery module for three-phase network units from 2x200V to
3x220V.
BC Last three digits of the battery code.
100A Protection size.
999 Last three digits of the battery code.
AB Letters denoting the battery type.
44 Number of batteries of a single branch.
*x Number of battery branches in parallel. Omit for one.
0/ Battery module without batteries but with cabinet and the nec-
essary accessories for installing them.
/ Battery module without factory-installed batteries but with a
cabinet and the necessary accessories for installing them. Bat-
teries are supplied separately.
CUBE4 Battery module series.
KIT Only for / units as the batteries are not installed in the units and
it is treated as a KIT.

11
USER MANUAL SLC CUBE4 7.5 kVA to 20 kVA - UNINTERRUPTIBLE POWER SUPPLY-
(B1) The unit is supplied without batteries and without accessories (screws and electric cables). The batteries are expected to be
installed in an external cabinet or battery rack. Upon request, the cabinet or rack and the necessary accessories can be supplied.
For units ordered without batteries, their purchase, installation and connection will always be borne by the customer and under their
responsibility. However, the intervention of our T.S.S.to carry out the necessary installation and connection work may be necessary.
The data related to the batteries in terms of number, capacity and voltage are indicated on the battery label next to the unit's name plate.
Adhere strictly to these data and the polarity of the battery connection.
On units with a separate static bypass line, a galvanic insulation isolation transformer must be inserted in either of the two UPS
power lines (rectifier or static bypass input), to prevent the direct connection of the neutral of the two lines via the unit's in-
ternal connections. This only applies when the two power lines come from two different networks, such as:
- Two different electricity companies. - An electricity company and a generator set...
4.3. UPS CHARACTERISTICS LABEL
SLC CUBE4
4.4. UPS DESCRIPTION
4.4.1. General description and block diagram
The SLC CUBE4 unit is a double conversion online Uninterrupt-
ible Power Supply (UPS). The classification in terms of its per-
formance is in accordance with the UPS international standard
(IEC 62040-3), corresponding to “VFI-SS-111” (1).
The UPS achieves maximum performance in terms of efficiency,
reliability, availability and adaptability to the needs of every in-
stallation, thanks to its advanced design:
•Control based on 2 DSP (Digital Signal Processor) cores for
the PFC and the Inverter, and two microcontrollers for the
display and communications.
•Rectifier and inverter with 3 switching levels.
•State-of-the-art electronic switching devices.
•Compact mechanical design optimised for maintenance.
•Advanced control techniques for achieving the best elec-
trical performance.
•Parallel system of up to 4 units.
The main constituent parts of this unit are:
•Input and output EMI filters.
•Active rectifier with power factor correction (PFC) and low
harmonic absorption (THD-i) for the input current. It also car-
ries out the function of battery booster.
•3-level inverter, and low harmonic voltage distortion.
•Batteries (they may be external to the unit), and battery
charger.
•Static bypass
•Manual or maintenance bypass
•Control panel.
•Interface for external signals and communications.
(1)Note:
“VFI” (“Voltage Frequency Independent”), indicates that the output voltage and frequency
of the UPS are independent of the input voltage and frequency.
“SS” (sinusoidal-sinusoidal): sinusoidal output voltage both in normal and battery mode.
(See chapter 4.5. of this manual)
“111” (dynamic response classification “1”, see. IEC 62040-3): both in operating mode
changes, as well as in linear and non-linear load steps, the dynamic response is the best
possible (response speed, voltage drop) within the classification specified by the standard
in question.

12 SALICRU
MANUAL BYPASS
RECTIFIER-BOOSTER
DC LINK
INVERTER
BATTERY
CHARGER
BATTERY PACK
BYPASS
LINE
AC INPUT
AC OUTPUT
STATIC BY-
PASS SWITCH
Fig. 5. SLC CUBE4 UPS block diagram.
4.4.2. Rectifier-booster
The rectifier-booster has the double function of:
•Converting (rectify) the alternating voltage (AC) into direct
voltage (DC) in normal mode (input network voltage pre-
sent), voltage required at the inverter input.
•Adapting (boost) the battery voltage (DC) to the required
direct voltage (DC) at the inverter input.
This direct voltage generated by the rectifier-booster (supplied
to the inverter) will be referred to as direct bus voltage.
The rectifier-booster has a static switch at the input, using
thyristors, which allows the input source, alternate network
or batteries, to be selected at all times, according to the UPS
operating mode.
The rectification-boosting stage is carried out by the 3 sets of
dual boost converters, one per phase, made up of a power in-
ductor, IGBT transistors, diodes and electrolytic capacitors for
filtering the bus voltage. The excitation of the IGBT transis-
tors via PWM, controlled digitally, is carried out by one of the
floating-point DSPs, with the aim of obtaining:
•Sinusoidal current absorption (low THDi) in normal or AC
mode, so that no distortion is added to the input network,
avoiding affecting the other loads.
•Power factor 1 from very low levels of output load.
•Balanced absorption of the three-phase input currents.
•Direct current absorption in battery or DC mode.
The sizing of the rectifier will allow the inverter to be perma-
nently supplied with 100% load, plus the power required to
charge the batteries.
4.4.3. Inverter
The inverter converts the DC voltage present at the DC bus into
AC alternating voltage, stabilised in amplitude and frequency.
Therefore, it completes the double conversion, so that this new
"clean" AC voltage is independent of the input voltage (isolated
from potential disturbances, peaks, dips, unstable frequency,
etc.).
The architecture of this converter is based on 3 separate single-
phase inverters with 3 switching levels (4 IGBT transistors per
phase), thus achieving the following:
•Minimal switching losses (half the PWM voltage compared
to a conventional 2-level inverter).
•A reduction of the switching ripple on the power inductor,
and an overall reduction of the L-C filtering effort.
•The switching frequency is raised to non-audible values.
The control of this inverter is also digital, and is carried out by
another of the system's floating-point DSP cores. The gener-
ated voltage has:
•Low harmonic voltage distortion (THDv), even for highly dis-
torting loads (non-linear load).
•Stable output voltage, with accuracies greater than 0.5%
with regards to voltage and greater than 0.05% with re-
gards to frequency.
•Current limit: in the event of output short circuits, starting
loads with peak overcurrent ("in-rush"), or similar. The in-
verter limits the output current by reducing the output
voltage (at the limit, to 0 V in the case of short circuits),
in order to protect the unit in such situations, or it allows
"starting" loads with this initial overcurrent.
The inverter is sized to operate permanently charged at 100%,
and also for temporary overloads, depending on a Load-Time
curve, with typical values of 125% for 10 minutes, 150% for
1 minute.
4.4.4. Batteries and battery charger
The batteries are the element that allows the UPS to work in
the absence of an AC input network, i.e. in autonomy or battery
mode. These elements can be integrated in the standard cab-
inet of the UPS or in an external cabinet or rack (a combination
of internal and external batteries is also an option). The number
of batteries (normally in 12 V blocks) must be enough to allow
the rectifier-booster to work within its operating ranges, with a
certain amount of flexibility to adjust to the required autonomy.
As already explained in the Rectifier-booster section, in battery
mode, the battery voltage will be connected (via controlled thy-
ristors) to the booster input, and this converter will be discon-
nected from the AC input (except for hybrid operating modes).

13
USER MANUAL SLC CUBE4 7.5 kVA to 20 kVA - UNINTERRUPTIBLE POWER SUPPLY-
In terms of charging the batteries, this will occur when the UPS
is working in normal mode (AC voltage network present, AC/DC
rectifier operating). The UPS has a reducer converter ("buck"),
which is supplied by the DC bus voltage, adjusting it to the re-
quired levels for charging the batteries. This battery charging
includes 2 basic stages, or even 3 (depending on the type of
battery):
•Constant current: the set charge current must not be ex-
ceeded, and the output voltage of the charger will be dy-
namically adjusted to achieve this allocation.
•Constant voltage: once the battery floating voltage is
reached, the charge current will decrease. This floating
voltage must be maintained in normal mode, a voltage that
will be readjusted depending on the temperature.
•Quick charge or "boost" voltage: depending on the type of
battery (chemistry), an intermediate stage can be config-
ured, after charging at constant current and before allo-
cating continuous float voltage, which consists of supplying
the batteries with a voltage that is higher than the floating
voltage for a limited time, in order to obtain a quicker and
more efficient recharge.
The architecture of the charger is based on a double reducer
converter: from positive and negative semi-buses, positive and
negative battery charge voltages and currents are obtained.
The switching of the charger's IGBTs also consists of a PWM
controlled digitally by DSP.
The charger incorporated as standard in the units allows the
batteries to be recharged for both standard autonomy and for
extended autonomy (greater capacity in Ah installed).
4.4.5. Static bypass
The static bypass switch allows the load or loads to be switched
between the inverter and the emergency (or bypass) network,
and vice versa, without interruption. This bypass line may or
may not be common to the rectifier AC input.
However, and unless otherwise requested - separate networks
-, the phase terminals of both blocks are connected internally at
the factory in order to have a single common input.
When separate power supplies are required, it will be neces-
sary to remove the bridges between phases from both blocks
before connecting the power cables.
The switching of the output load to the bypass line can be or-
dered manually, or it can be activated by the UPS automatic
control in certain emergency situations, such as overload or over-
temperature.
As power switching elements, it uses thyristors (SCR) and re-
lays. Thyristors for connecting/disconnecting the voltage of the
bypass line to the loads, relays for connecting/disconnecting
the inverter voltage.
4.4.6. Manual or maintenance bypass
The manual bypass is used to isolate the UPS from the input
voltage and loads, supplying the load directly from the input net-
work in the event of maintenance or serious faults.
It consists of a switch, supplied as standard and integrated in
the unit, which allows the bypass or emergency line voltage
(common or not to the rectifier AC input) to be connected
directly to the output by simply activating this switch, and
without the intervention of a converter or controlled electronic
device. An auxiliary signal will notify the UPS control that this
switch is activated.
The manual bypass switch supplied in the unit has a mechan-
ical lock that makes it impossible for it to be activated acciden-
tally by unqualified staff.
Before operating this switch, it is necessary to transfer the
power supply of the load on the static bypass via the respec-
tive command from the touchscreen. The transfer of the power
supply to the loads from the static bypass to the manual bypass
is without interruption.
External manual bypass
In addition to the standard internal manual bypass, it is also
possible to optionally install an external manual bypass.
4.4.7. Input-output configurations
The types available are:
•Three-phase/three-phase (with or without separate by-
pass).
•Three-phase/single-phase.
•Single-phase/single-phase (with or without separate by-
pass).
The user is not permitted or authorised to change the
configuration, as this implies the modification of the
plates between the power terminals by adding or removing
them in order to obtain the required configuration, as well as
changes to variables from menus accessed by "Password" via
the control panel.
4.5. OPERATING MODES
The UPS can operate in various operating modes, which can
be reached automatically or forced by a manual action of the
operator. These basic operating modes are:
•Normal mode.
•Battery mode (autonomy mode).
•Bypass mode.
•Maintenance bypass mode.
•ECO mode.
•Frequency converter mode.
•Standby mode.
4.5.1. Normal mode.
For the UPS to work in normal mode, there must be an input
network (input switch activated), output switch activated
(supply for the loads), and there must be batteries in the unit or
connected in an external cabinet.
In this double conversion mode, the rectifier works powered by the
AC network and supplying direct voltage to the inverter (DC bus). The
inverter converts the DC voltage into a stabilised sine wave, con-
necting to the loads via its static switch. The rectifier also supplies
voltage to the battery charger, which keeps the batteries in an op-
timal state of charge.

14 SALICRU
input for the rectifier and the bypass, the power supply of the load
is interrupted ("black-out"). For units with a bypass line that is inde-
pendent of the rectifier AC input, if, upon reaching the battery dis-
charge limit, the voltage in the bypass line is within the tolerance
limits, the power supply of the load will be transferred to this emer-
gency line.
After a stop due to the end of autonomy, when the power supply
is restored, the rectifier will restart the charging of the batteries.
If the power supply of the loads was interrupted (common bypass
at rectifier input), they will be powered initially via the static by-
pass switch, and once the inverter restarts and is reconnected to
the output, they will be powered by it.
It is the operating status with the highest protection for the
loads, as it applies "clean" voltage to them independently of the
input voltage, and with the battery power available in case an
AC network fault occurs.
MANUAL BYPASS
AC OUTPUT
STATIC BY-
PASS SWITCH
INVERTER
DC LINK
BATTERY
CHARGER
BATTERY PACK
AC INPUT
BYPASS
LINE
RECTIFIER-BOOSTER
Fig. 6. UPS power flow in normal mode.
4.5.2. Battery mode
In the event of an AC power supply fault, the rectifier-booster
switches its input power source from the AC network to the bat-
tery without interruption. Although the battery voltage decreases
according to the discharge current value, the rectifier-booster is re-
sponsible for keeping the direct voltage to the inverter input within
the nominal working values.
If the supply is restored before the batteries are completely dis-
charged, the system will return to normal operation automatically:
rectifier operating in AC/DC conversion, charger charging batteries
and inverter operating normally.
Otherwise, as soon as the batteries reach the discharge limit (end of
autonomy), the inverter switches off, and if the unit has a common
MANUAL BYPASS
AC OUTPUT
STATIC BY-
PASS SWITCH
INVERTER
BATTERY
CHARGER
BATTERY PACK
DC LINK
RECTIFIER-BOOSTER
BYPASS
LINE
AC INPUT
Fig. 7. UPS power flow in battery mode.

15
USER MANUAL SLC CUBE4 7.5 kVA to 20 kVA - UNINTERRUPTIBLE POWER SUPPLY-
4.5.3. Bypass mode
In this operating mode, the voltage supplied to the loads cor-
responds directly to the emergency (or bypass) line, connected
to the output by controlled thyristors. The inverter is discon-
nected from the output (open relays), and this converter can be
completely stopped. This is a transient operating mode, or one
that has been reached due to an emergency, where the loads
are not "protected" against disturbances in the AC network or
even power outages.
From normal operating mode, the load can be transferred to the
bypass line, both via manual command by the operator or via
communications, as well as automatically via the UPS (through
its management logic), given specific circumstances (alarms),
such as:
•Output overload.
•Overtemperature of UPS parts or elements.
•Failure or malfunctioning of an internal converter.
•Manual bypass activation.
MANUAL BYPASS
AC OUTPUT
STATIC BY-
PASS SWITCH
INVERTER
BATTERY
CHARGER
DC LINK
BATTERY PACK
RECTIFIER-BOOSTER
BYPASS
LINE
AC INPUT
Fig. 8. UPS power flow in bypass mode.
4.5.4. Maintenance bypass mode
This operating mode allows the UPS to be maintained or re-
paired without interrupting the power supply to the loads.
The operations for transferring to manual bypass and
returning to normal operation will be carried out in ac-
cordance with the steps set out in the corresponding chapter of
this document. The user will be solely responsible for any
damage caused to the UPS, loads and/or installation due to
improper actions.
After the controlled transfer process to the maintenance by-
pass, the loads will be supplied directly from the bypass line
(common or not to the rectifier AC input), and initially all con-
verters and internal power supplies of the UPS will be stopped.
In this way, the qualified technical service staff will be able to:
•Check the inside of the UPS without the presence of dan-
gerous voltages (except for battery voltage).
•Replace boards or electronic components that require
maintenance or repair.
•Start parts of the UPS in test mode.
MANUAL BYPASS
AC OUTPUT
STATIC BY-
PASS SWITCH
INVERTER
BATTERY
CHARGER
DC LINK
BATTERY PACK
RECTIFIER-BOOSTER
BYPASS
LINE
AC INPUT
Fig. 9. UPS power flow in manual or maintenance
bypass mode.

16 SALICRU
account that some of the bypass line disturbances can reach crit-
ical loads in a "transparent" way, either because they cannot be
detected or due to the delay in their detection and the connection
of the inverter to the output.
The increase in efficiency (about +2%~3%) is due to the fact
that while the bypass line is connected to the output, the in-
verter is stopped, therefore the conduction and switching
losses of this converter are avoided.
Even when in bypass, the rectifier will remain in operation, with
the aim of the DC bus being within the operating ranges of the
inverter, allowing a quick intervention of the latter. In turn, the
charger will carry out periodic start-stop cycles for greater ef-
ficiency of the system averaged over time, always monitoring
the possible self-discharge of the batteries and recharging them
when necessary.
MANUAL BYPASS
AC OUTPUT
STATIC BYPASS
SWITCH
INVERTER
DC LINK
BATTERY
CHARGER
BATTERY PACK
AC INPUT
BYPASS
LINE
RECTIFIER-BOOSTER
Fig. 10. UPS power flow in ECO mode.
4.5.6. Frequency converter mode
When operating in this mode, activated by configuration, the unit
supplies a fixed output frequency of 50 or 60 Hz, which may be
different to the input frequency. It consists of an operating mode
derived from normal mode, as double conversion is performed,
AC/DC rectifier and DC/AC inverter running.
4.5.5. ECO mode
In addition to normal mode and bypass mode, it is possible to
activate ECO mode in order to obtain greater overall system
efficiency than normal mode. The downside is that the degree
of protection for critical loads will be lower than normal mode
(although greater than bypass mode).
In this operating mode, the output voltage is supplied by the
static bypass via the emergency (or bypass) line, and the in-
verter converter will be stopped and ready to restart and
connect to the output when a bypass voltage outside of the
programmed ranges is detected.
In the moments of transition (automatic transfer of the
output: from the bypass to the voltage generated by the
inverter), voltage dips can occur at the output of a few milliseconds
(from 2 to 4 ms) that the critical loads must be capable of tolerating
in order to make ECO mode viable. In addition, it must be taken into
When operating in this mode, the UPS static bypass is disabled,
and may not even be physically present in the unit construction
(if a frequency converter has been specifically ordered from the
factory). The manual bypass switch (if present) should also not
be actuated due to the possible impact on the loads connected
at the output.
MANUAL BYPASS
AC OUTPUT
STATIC BY-
PASS SWITCH
INVERTER
DC LINK
BATTERY
CHARGER
BATTERY PACK
AC INPUT
BYPASS
LINE
RECTIFIER-BOOSTER
Fig. 11. UPS power flow in frequency converter mode.

17
USER MANUAL SLC CUBE4 7.5 kVA to 20 kVA - UNINTERRUPTIBLE POWER SUPPLY-
4.5.7. Standby mode
By default, when the unit has bypass voltage, the unit powers
the loads via the bypass. This function can be deactivated and
the unit remains in standby mode without powering the loads
via the bypass, and remains in standby mode until the order is
given to start the UPS in online mode.
MANUAL BYPASS
AC OUTPUT
INVERTER
DC LINK
BATTERY
CHARGER
BATTERY PACK
AC INPUT
BYPASS
LINE
RECTIFIER-BOOSTER
STATIC BYPASS
SWITCH
Fig. 12. UPS power flow in standby mode.
4.6. OPERATION AND CONTROL DEVICES
The operation and control devices allow the UPS user/operator
to carry out the following actions, among others:
•Unit start-up.
•Special operations (such as switching to bypass mode).
•Maintenance and repair interventions (maintenance bypass
mode).
•Monitoring of parameters and measurements "in-situ" via
the unit screen (for example: consumption, load percent-
ages, etc.).
•Remote monitoring and signalling (external to the UPS):
Digital inputs corresponding to external switchgear
(e.g. external manual bypass).
Activation of UPS operating mode indication relays (e.g.
UPS in battery mode indication relay).
RS232/USB communication ports.
Communication slot (SNMP, Nimbus, relay extension,
extension of functions).
The use of UPS operation and control devices is only
intended for authorised staff. It is recommended to
check the training of staff who are responsible for the use and
maintenance of the system.
4.6.1. Switches
The switches arranged in the UPS are used to isolate the unit
from the AC power supply, the storage batteries and the load.
Presence of voltage at unit terminals.
The disconnect switches do not fully isolate the UPS, as
the AC voltage is still present at the UPS input terminals. Before
carrying out any maintenance on the unit, it is necessary to:
•Fully isolate the UPS by opening (disconnecting) the ex-
ternal switches.
•Wait for at least 5 minutes to allow the capacitors to dis-
charge.
The SLC CUBE4 UPS has the following switches:
•Rectifier AC input line switch, circuit breaker type (Q1).
•AC bypass line switch, circuit breaker type (Q4).
•Circuit breaker for maintenance bypass (Q5). This switch
will remain mechanically locked (against activation) during
operation in normal mode.
•Output disconnect switch (Q2). It allows the voltage sup-
plied by the UPS to be connected to the loads, or for them
to be isolated if necessary.
•For external battery cabinets, fuse holder disconnect switch
(F8).
In the case of battery cabinets with a fuse holder
disconnect switch, disconnection with load is not
permitted.
4.6.2. Control panel with touchscreen
The control panel of the UPS is fully integrated into a graphic
touchscreen ("touch panel"). Some of the characteristics of this
screen are as follows:
•5” diagonal screen size.
•16:9 aspect ratio.
•Resolution of 800 x 480 pixels.
•65 K colours.
•Capacitive touch sensor.
This control panel allows:
•Monitoring of measurements and operating parameters.
•Display and acknowledgement of alarms and statuses (ac-
tive and passed).
•Modification of basic operating configurations and parameters.
•Change of UPS operating mode (normal, bypass, ECO mode,
battery test).

18 SALICRU
4.6.3. External interface and communications
The communications line (COM) consists of a very low
voltage circuit and it must be installed separately from
other lines that carry dangerous voltages (power distribution
line).
4.6.3.1. Digital inputs, relay interface and communications
The unit's interface with the outside consists of various dedi-
cated input and output signals, and different ports and com-
munication slots, as shown below in Fig. 13:
INTELLIGENT SLOT PARALLEL CONNECTIONEMBS
USB
EPO
OUTPUT SIGNAL INPUT SIGNAL
RS232
12
6
3 5
COM2
COM1
4
87
2
GND Vdc
3 5
1
OP OP
4 6
Fig. 13. Detailed view of the external interface and com-
munications.
1. Signalling (terminal strip):
Digital inputs (INPUT SIGNAL):
Pin Description
1Remote On UPS.
2 Remote Off UPS.
3Shutdown-Restore: UPS stop, restart in 1 min.
4Generator set supplying the UPS (activates generator func-
tion).
5External output switch auxiliary contact. Opening the external
control panel output switch activates warning <45> External
output switch open and the unit is disconnected from the par-
allel system.
6External battery switch auxiliary contact. Opening the external
control panel battery switch activates warning <46> Battery
switch open.
7Signal provided for an external bypass line switch auxiliary con-
tact. Opening the external control panel bypass switch activates
warning <47> Bypass switch open.
8External input line switch auxiliary contact. Opening the external
control panel input line switch activates warning <48> Input
breaker open.
Connection with posi-
tive common
Connection with
negative common
Fig. 14. Connection diagram of the digital input contacts.
Digital outputs (OUTPUT SIGNAL), via potential free
relay contacts (standard unit):
Pin Description
1Unit in online or normal mode.
2 Unit in bypass mode.
3Unit in battery mode.
4Low battery. Battery end of autonomy alarm (early activation).
5Any warning present in the unit. The UPS continues to operate
in normal mode.
6Summary Alarm (bypass mode / battery mode / bat open /
bypass loss / fault / warning / line fault).

19
USER MANUAL SLC CUBE4 7.5 kVA to 20 kVA - UNINTERRUPTIBLE POWER SUPPLY-
Application example:
UPS
Fig. 15. Connection of digital outputs.
2. Direct communications of the unit:
USB (Type-B) port.
RS232 port (DB9 connector).
Both ports are mutually exclusive.
Parallel ports (see Parallel Connection Fig. 13)
–Two DB15 connectors: communication bus.
–Two 6-pin strips: current signal bus.
To connect units in parallel, it is necessary to intercon-
nect both ports (output of one to input of the next one
using the cables supplied).
3. Communication slot:
A slot for installing a communication card, either SNMP or
any other card for extending communications, signalling and/
or other services. a "Nimbus" communication card is supplied
by default, which allows connection to the "cloud" services
owned by SALICRU.
4.6.3.2. Manual bypass auxiliary contact terminals (EMBS)
The unit's manual bypass switch (Q5) has a microswitch fitted
behind its mechanical lock. This normally open contact is ex-
tended to a two-terminal strip (EMBS) located behind the unit
(see Fig. 13 and Fig. 16) and internally connected to the UPS
control.
On distribution boards with a manual bypass supplied on re-
quest, there is a two-terminal strip connected in parallel with
the normally open auxiliary contact of the manual bypass
switch or disconnect switch of the board itself. The manual by-
pass auxiliary contacts are of the advanced when closing type.
The connection between the board's auxiliary contact and the
UPS or UPSs is in parallel with that of the board. As such, any
of the auxiliary contacts that close the circuit will activate the
inverter stop order, supplying output voltage via the static by-
pass, unless it is disabled via the control panel, which will cut
the power to the loads.
In parallel systems, the manual bypass switch or discon-
nect switch of the distribution board has an auxiliary
contact block for each unit. Under no circumstances join the
different contacts to each other, thus avoiding joining the dif-
ferent earths of the control of each UPS.
If you acquire a manual bypass panel from another
source, check that it has the indicated auxiliary contact
and connect it to the terminal strip of the UPS or of each unit in
parallel systems. The auxiliary contacts must be the advanced
when closing type.
As a safety measure for the system, including the loads,
it is ESSENTIAL to connect the UPS strips to the strip
with the same functionality on the manual bypass panel. As
such, an incorrect action on any manual bypass switch or dis-
connect switch with the UPS running will be prevented from
causing the total or partial failure of the installation, including
loads.
Fig. 16. UPS manual bypass switch auxiliary contact
connector.
4.6.3.3. EPO (Emergency Power Off) terminals
The UPS has two terminals for the installation of an external
Emergency Power Off (EPO) button (Fig. 13).
By default, the unit is issued from the factory with the closed
EPO circuit type -NC-: the UPS will cut the power supply, emer-
gency stop, by opening the circuit:
•Either by removing the female connector of the socket
where it is inserted. This connector has a cable connected
as a bridge that closes the circuit (see Fig. 17-A).
•Or by activating the unit's external button, which belongs to
the user and is installed between the connector terminals
(see Fig. 17-B). The connection on the button must be in the
normally closed (NC) contact, so the circuit will open when
it is activated.
Via the communication software, it is possible to select the re-
verse functionality (NO).
However, and except for specific cases, we advise against this
type of connection in view of the purpose of the EPO button, as
it will not act upon an emergency request if either of the two
cables that run from the button to the UPS is cut (this anomaly
would immediately be detected in a closed EPO circuit -NC-,
which, although there is a risk of an unexpected cut in the pow-
ering of the loads, ensures an effective emergency function-
ality).
To recover the normal operating status of the UPS, it is neces-
sary to insert the connector with the bridge into its receptacle
or deactivate the EPO button. The unit will be operational.
Fig. 17. Connector for the external EPO.

20 SALICRU
5. INSTALLATION
Read and follow the Safety Information set out in
chapter 2of this document. Failure to adhere to any of
the indications set out in chapter 2 may cause a serious or very
serious accident for those who are in direct contact with the
unit or who are in the vicinity, as well as faults in the unit and/
or in the loads connected to it.
In addition to the unit's user manual, other documents are sup-
plied on the documentation pen drive. Consult them and strictly
follow the indicated procedure.
The cross-sections of the cables used for the installation will be
in line with the currents indicated on the name plate, in compli-
ance with local Low Voltage Electrotechnical Regulations.
This chapter details the relevant requirements for locating and
wiring the SLC CUBE4 7.5-20 kVA UPS series. As each site has
its own location and installation particularities, the purpose of
this chapter is not to provide precise step-by-step instructions,
rather it should be used as a guide for the general procedures and
practices to be observed by qualified staff (figure recognised
and defined in the EK266*08 safety instructions).
Unless indicated otherwise, all actions, indications, premises,
notes, etc. are applicable to the SLC CUBE4 units, whether or not
they form part of a parallel system.
5.1. RECEPTION.
All cabinets are supplied on wooden pallets that are mechani-
cally attached to them, with cardboard or wooden packaging
according to the model. Although the risk of tipping is minimal,
they must be handled with care, especially the taller cabinets
and when there is a slope.
•It is dangerous to handle the unit on the pallet in a
careless manner, as it could tip and cause serious or
very serious injuries to the operators, resulting from impact
due to it possibly tipping over and/or operators becoming
trapped. Pay attention to section 1.2.1. of the safety in-
structions -EK266*08- in all matters relating to the han-
dling, moving and positioning of the unit.
Use the most suitable means for moving the UPS when it is still
packed, with a pallet truck or forklift.
Any handling of the unit must be done paying attention to the
weights indicated in "Annex III. Technical specifications" ac-
cording to the model.
5.1.1. Reception, unpacking and contents
•Reception. Check that:
The information on the label attached to the packaging
corresponds to the information specified in the order.
Once the UPS is unpacked, check the above information
with the information on the unit's name plate.
If there are any discrepancies, deal with the non-con-
formity as soon as possible, citing the unit's manufac-
turing number and the references on the delivery note.
It has not suffered any mishap during transport (pack-
aging and impact indicator in perfect condition).
Otherwise, follow the protocol indicated on the label at-
tached to the impact indicator, located on the packaging.
•Unpacking
To check the contents, the packaging must be removed.
Complete the unpacking according to the proce-
dure in section 5.1.3.
•Contents
UPS:
The unit itself.
The user manual in electronic format [Pen Drive].
1 RJ45 cable for connection with the Nimbus commu-
nication card.
In the case of a parallel system, a set of parallel cables.
Battery cabinet:
Battery connection bundle.
Three battery fuses to be installed in the fuse holder
disconnect switch.
Once the reception process is complete, the UPS should be
repacked until it is started up in order to protect it against me-
chanical shock, dust, dirt, etc.
5.1.2. Storage
The unit must be stored in a dry, well-ventilated area, protected
from rain, dust, splashes of water or chemical agents. It is
recommended to keep each unit in its original packaging, as it
has been specifically designed to ensure maximum protection
during transport and storage.
For units that contain Pb-Ca batteries, the charging periods
indicated in Tab. 2 of document EK266*08 must be ob-
served, as well as the storage temperature to which they are ex-
posed, otherwise the warranty may be invalidated.
Fecha carga / Fecha recarga /
Charging date : Recharging date:
DY933B00 - 401AF000001
BACK MATERIAL
MUY IMPORTANTE PARA LA VIDA DE LAS BATERÍAS DE Pb-Ca: Para evitar
su degradación deben ser recargadas en los intervalos indicados. Respetar
el procedimiento referido en el manual de usuario del equipo.
VERYIMPORTANT FOR THELIFETIME OF Pb-Ca BATTERIES:In order to avoid
their degradation, they must be recharged according to the stated interval
times. Respect the procedure referred in the equipment user’s manual.
0 - 20 12
21 - 30 9
31 - 40 5
41 - 50 2,5
Meses /
Months
ºC
Factory charging date noted.
Space to note the new charging date.
**-**-****
Data label for the model.
Fig. 18. Label on the packaging of the battery unit.
•After this period, connect the unit to the mains together
with the battery unit, if applicable, start it according to the
instructions described in this manual and charge for 12
hours.