COMEX COVER MY 30k User manual

COMEX S.A.
Uninterraptible power supply UPS
COVER MY
30 kVA/kW
User Manual

COMEX S.A.
The content of this document is the copyright of the publisher and
may not be reproduced without prior permission. The right to modify
the design and specifications is reserved without prior notice.
Copyright 2020
COMEX S.A.
All rights reserved.

COMEX S.A.
Table of contents
1. Precautions .................................................................................................................................1
2. Installation procedure.................................................................................................................3
2.1. Introduction..........................................................................................................................3
2.3. Location................................................................................................................................4
2.3.1. UPS room ......................................................................................................................4
2.3.2. Battery room .................................................................................................................4
2.3.3. Storage..........................................................................................................................4
2.4. Unpacking, checking and setting...........................................................................................4
2.4.1. Unpacking......................................................................................................................4
2.4.2. The appearance and dimensions of the UPS ..................................................................6
2.4.3. Service space.................................................................................................................7
2.5. Security elements .................................................................................................................7
2.5.1. UPS input power............................................................................................................8
2.5.2. Battery circuit protection...............................................................................................8
2.6. Power cables ........................................................................................................................9
2.6.1. Maximum power supply currents ..................................................................................9
2.6.2. Connecting the AC cables ............................................................................................10
2.6.3. Battery connection ......................................................................................................12
2.7. Communication ..................................................................................................................14
2.7.1. Dry Contact IN / OUT communicationomun.................................................................14
2.7.2. Parallel connection ......................................................................................................17
2.7.3. Communication card slots ...........................................................................................17
2.7.4. Modbus RTU / RS485 connector ..................................................................................18
3. UPS operation modes................................................................................................................19
3.1. Introduction........................................................................................................................19
3.2. Principle of operation .........................................................................................................19
3.2.1. Bypass module ............................................................................................................20
3.3. Power supply operation modes ..........................................................................................20
3.3.1. Normal operation (On Line) .........................................................................................20
3.3.2. Battery operation ........................................................................................................20
3.3.3. Automatic restart ........................................................................................................21
3.3.4. Electronic bypass.........................................................................................................21
3.3.5. Service bypass .............................................................................................................21
3.3.6. Economical (ECO) ........................................................................................................21
3.3.7. Frequency converter....................................................................................................21
3.3.8. Parallel operation ........................................................................................................22
4. User manual for the power supply ............................................................................................23
4.1. Power connectors...............................................................................................................23
4.2. Procedures for starting the power supply - single operation...............................................24
4.2.1. Boot the UPS from a fully shutdown state ...................................................................24

COMEX S.A.
4.2.2. Running the UPS from the battery ...............................................................................24
4.3. Procedures for switching the power supply between operating modes ..............................25
4.3.1. Switching from normal operation to battery mode......................................................25
4.3.2. Switching from normal operation to bypass operation ................................................25
4.3.3. Switching from Bypass to normal operation ................................................................25
4.3.4. Switching from the normal operation mode to the Service Bypass mode ....................26
4.3.5. Switching from the Service Bypass mode to normal operation ....................................26
4.4. Procedure of complete disconnection of the power supply (power supply to the loads through
a mechanical bypass) ....................................................................................................................26
4.5. EPO emergency shutdown..................................................................................................26
4.6. Procedures for starting the power supply - parallel operation ............................................27
5. LCD panel operation..................................................................................................................28
5.1. Introduction........................................................................................................................28
5.2. Indications of the UPS operating status on the display........................................................29
5.3. Reading the operating parameters .....................................................................................30
5.3.1. Power supply of the bypass line...................................................................................30
5.3.2. Rectifier track supply ...................................................................................................31
5.3.3. Batteries......................................................................................................................31
5.3.4. UPS Output..................................................................................................................32
5.4. Event log.............................................................................................................................32
5.4.1. Device status information (Run info.)...........................................................................33
5.4.2. UPS event history ........................................................................................................33
5.4.3. User Log ......................................................................................................................33
5.4.4. Information about the current firmware versions........................................................34
5.5. System configuration settings.............................................................................................34
5.5.1. Configuration of the operating mode and parameters of the power supply.................35
5.5.2. Battery settings ...........................................................................................................36
5.5.3. Battery tests ................................................................................................................36
5.6. DryContact contact configuration .......................................................................................37
5.7. Modbus communication settings........................................................................................37
5.8. Display settings...................................................................................................................38
5.9. Password settings...............................................................................................................38
5.10. Configuration of the UPS operation mode.......................................................................39
5.11. UPS cleaning mode..........................................................................................................39
5.12. Saving the history of events to USB memory...................................................................40
5.13. Current alarms ................................................................................................................40
5.14. System speaker...............................................................................................................41
5.15. ON/OFF...........................................................................................................................41

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1. Precautions
This user manual contains necessary information on the installation and use of the MY COVER
power supplies.
Before starting the installation and use, please read the manual carefully. The UPS must be
installed and configured by the manufacturer's or distributor's authorized service center. In the
case of installations by persons without the required experience, there is a risk of exposing users
to loss of health or life. Persons not authorized to install may cause damage to the power supply,
which in this case is not covered by the warranty terms.
STANDARDS FULFILLED
The device meets the CE 73/23 and 93/68 (low voltage safety) directives as well as 89/336
(EMC) and the following standards:
*IEC62040-1-1
*IEC/EN62040-2 EMC CLASS C3
*IEC62040-3
CAUTION - High leakage current
The connection of the protective conductor (PE) is essential and must be made before
connecting the other working conductors (power supply, receiving, battery). Earthing should
be performed in accordance with the prevailing standards and practical knowledge in the
place of installation. The leakage current is greater than 3.5mA and less than 1000mA. When
selecting immediate action RCCB or RCD devices, take into account the transient and steady
state leakage currents that may occur during commissioning of the device. Select residual
current circuit breakers (RCCBs) that are sensitive to DC unidirectional pulses (Class A) and
not sensitive to transient current pulses. It should also be remembered that a given RCCB or
RCD device conducts leakage currents of the receiver.
Service
Dangerous voltage exists in the UPS housing. The risk of contact with such voltage is kept to
a minimum as the live parts are located behind the closed housing. Additional internal
protective covers ensure that the device is protected in accordance with the protection class
IP20. Normal operation of the device, taking into account the recommended operating
procedures, does not pose any threat to the personnel. All maintenance and service
procedures require access to the interior of the unit and should only be performed by trained
personnel.
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High battery voltage > 400 Vdc
All work related to the maintenance and installation of batteries may be performed by a
properly trained service. When the batteries are connected, the voltage across their
terminals exceeds 400 Vdc and is potentially lethal. Battery manufacturers provide detailed
precautions that must be observed when working on or in the vicinity of large battery
batteries. Such measures must always be strictly adhered to. Particular attention should be
paid to the recommendations regarding local environmental conditions and the provision of
protective clothing, first aid and fire fighting equipment.
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2. Installation procedure
This chapter is devoted to the method of installation, mounting and wiring of the UPS.
2.1. Introduction
This chapter presents the basic requirements for the location and cabling of the power supply.
The description presents a step-by-step installation manual, which is a series of guidelines that
should be followed by the service when installing the device.
Warning - Installation may only be performed by an authorized service
center
1. Do not connect electrical appliances to the power supply until the service technician has
verified that the power supply is properly connected and configured.
2. The UPS should be installed by qualified technical personnel in accordance with the
guidelines contained in this chapter.
Do not perform any electrical work interfering with the electrical system upstream and
downstream of the UPS while the UPS system is operating. Damage resulting from this (eg
change of the phase sequence) is not covered by the warranty.
Warning: Dangerous Batteries
Particular precautions must be taken when working with batteries connected to the power
supply. When the battery is connected, the terminal voltage exceeds 400 Vdc and is
potentially lethal.
To protect the eyes against an accidental electric arc, it is recommended to wear protective
glasses. Additionally, it is recommended to:
Remove rings, watches and all metal items
Only use tools with insulated handles.
If the battery leaks or is otherwise damaged, it must be replaced. Damaged batteries
should be stored in a sulfuric acid resistant container and disposed of in accordance with
local regulations.
If the electrolyte comes into contact with the skin, wash the contaminated area immediately
with water.
2.2. Initial inspection
Please perform the following checks prior to installation:
Visually check that the delivered devices, i.e. the UPS and the batteries, have not been
damaged during transport. Any damage found should be reported to the supplier
immediately.
Verify the compliance of the supplied equipment with the installation requirements. The
power of the power supply is each time described on the label.
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2.3. Location
2.3.1. UPS room
The UPS is intended for indoor installation. The device should be placed in a clean environment
with adequate ventilation to keep the ambient temperature within the required specification
range. The UPS provides forced convection cooling through internal fans. Cold air enters the
device through the vents at the front of the housing and is blown out through the grills at the
rear of the housing. Do not block the ventilation openings.
Depending on the room conditions, the ventilation openings of the power supply should be
regularly cleaned, e.g. with a vacuum cleaner. The accessibility of ventilation will ensure
efficient cooling and extend the life of the device.
Note: The UPS should be installed on a stable and non-flammable surface.
2.3.2. Battery room
The battery temperature should be stable as it is the main parameter influencing the battery
life and capacity. The optimal operating temperature of the battery is 15-25 ° C. It is
recommended to maintain a nominal temperature of 20 ° C.
Working at higher temperatures shortens the battery life, and working at lower temperatures
reduces their capacity. Each increase of the battery operating temperature by another 8 ° C
reduces the service life by 50%.
Keep batteries away from heat sources and hot air vents.
When installing the battery outside the UPS, use the battery circuit protection located as close
to the battery as possible. Keep the cables connecting the battery and the UPS as short as
possible.
2.3.3. Storage
If the device is not installed and needs to be stored, it should be protected against excessive
moisture and high temperature. Batteries should be stored in a dry and cool room. The most
suitable storage temperature for the battery is 20-25 ° C. If the appliance is not installed
immediately after delivery, it should be stored indoors so that it is protected from excessive
moisture and heat sources.
2.4. Unpacking, checking and setting
Before unpacking, carefully inspect the delivered packaging of the device to make sure that it
has not been damaged during transport. After removing it from the packaging, check that the
equipment has no signs of damage. If there is any damage, report it to the supplier immediately.
2.4.1. Unpacking
The power supply is delivered in a cardboard box on a wooden pallet. To unpack, remove the
cardboard packaging and protective foams inside the packaging. The following shows the device
after removing the packaging.

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Figure 2.1. View of an exemplary power supply after removing the packaging
Tip: Remove the screws connecting the UPS housing with the wooden pallet, and screw in the
feet stabilizing the UPS, and then place the UPS at the installation point, using the exit provided
in the UPS housing. Disassembly should be done carefully so as not to damage the housing.
Please check the supplied equipment for correctness on the label located on the top cover of
the UPS. The label provides basic information about the model, power, etc.
Note: The protective materials remaining after dismantling (wood, plastic, etc.) must be
disposed of in accordance with the applicable local environmental regulations.
In order to extend the life of the device, it is necessary to provide a suitable place for its
installation, which should guarantee:
- Easy to connect to the electrical installation
- Sufficient space for handling
- Ventilation or air conditioning to ensure adequate cooling of the power supply
- Protection against corrosive gases and vapors
- Protection against excessive moisture and heat sources
- Protection against dust, dirt and other contaminants
- Adequate fire protection
- Working temperature should be in the range of 20-25ºC. At this temperature, the batteries
perform at their optimum.

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2.4.2. The appearance and dimensions of the UPS
The appearance and dimensions [mm] of the UPS are shown in the figures below:
Figure 2.2. Front / side view of the MY 30K UPS
Figure 2.3. Bottom view of the MY 30K UPS

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2.4.3. Service space
There are no vents on the side walls of the power supply, so no free space is required on the
side for ventilation. However, for access to the device from each side, it is recommended to
maintain min. 50 cm service space.
It is required to provide adequate space in front of the power supply for easy operation and the
possibility of drawing cold air from the environment. Recommended space from the front 80
cm. Due to the required access to the rear of the power supply as well as free air exhaust and
circulation, the recommended space from the rear of the power supply is at least 30 cm.
2.5. Security elements
For safety reasons, it is required to install appropriate protections in the form of over-current
circuit breakers or other protection devices in the UPS supply switchboard. This chapter
provides general practical information for installation by qualified electricians. Additionally,
≥500

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personnel with appropriate knowledge and authorizations should have knowledge of the
standards and norms in force on the local market regarding the type and cross-sections of
cables, their arrangement and load capacity. It is recommended to use LgY or OpD hoses.
2.5.1. UPS input power
The UPS should be supplied from an electrical switchboard equipped with an appropriate
protection device, matched to the maximum power of the system, and flexible cables with an
appropriate current-carrying capacity matched to the applied protection.
If installation of RCDs on the UPS power supply is required, remember that these devices should:
- be sensitive to unidirectional DC current pulses (class A)
- not be sensitive to transient current pulses
- have adjustable sensitivity in the range 0.3 - 1A.
The RCD must be sensitive to unidirectional DC current pulses, and insensitive to transient
current pulses, as shown in the figure below:
Figure 2.4. RCD marking
2.5.2. Battery circuit protection
The battery required for correct operation of the power supply consists of 30 - 40 12 V batteries
connected in series. A 3-wire installation is required with a center neutral point taken from the
central connection between battery 20 and 21, in the case of a string 40 of batteries. The battery
circuit must be protected with an appropriate fuse, selected according to the power of the UPS.
The detailed battery installation drawing is shown below:
Figure 2.5. Diagram of connecting 40 batteries in series with the central point
MY series UPS are equipped with an advanced discontinuous charging system, characterized by
two charging levels and a rest period. The batteries are charged with a constant current value
and a constant voltage value to obtain the maximum battery capacity. After the charging
process, which usually takes up to 2 days, the so-called “resting mode” period consisting in
switching off the charging system. Disconnecting the charger from fully charged batteries
eliminates the process of their continuous recharging, which in long operation may lead to
drying out of the electrolyte and accelerated battery wear. The period of restoration depends
on the speed of self-discharge of the accumulator batteries over time and the conditions in the
room where they are used. As standard, in the absence of power outages, the charging system
is activated after 14 days of the rest period, which is the most optimal value from the point of
view of battery life and ensuring the required autonomy.

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2.6. Power cables
The main factors that influence cable selection are the supply voltage, amperage, room
temperature and cable installation conditions.
System power cables must be selected in accordance with the regulations in force at the place
of installation and in accordance with the following description:
The UPS input cables must be sized for the maximum input current and maximum battery
charging current specified in the table below, taking into account the power rating of the UPS
and the AC input voltage.
Output and bypass cables must be sized for the rated output current shown in the table, taking
into account the power rating of the power supply and the AC output voltage.
The battery cables must be selected for the battery discharge current at the end of discharge
voltage given in the table, taking into account the rated power of the PSU.
The terminal block for connecting the power / receiving cables in the 30kVA UPS is located on
the back of the UPS. The strip has M6 bolt and eyelet connections. Cable access is provided on
the bottom of the power supply as shown in Figure 2-7.
Figure 2.5. View of the back wall of the power supply and the place of connecting the cables
Warning
BEFORE WIRING THE POWER SUPPLY, ENSURE THE POSITION AND OPERATION OF THE
EXTERNAL DISCONNECTORS THAT CONNECT THE INPUT / BYPASS POWER SUPPLY WITH THE
POWER DISTRIBUTION PANEL.
VERIFY THAT THE ABOVE POWER SOURCES ARE ELECTRICALLY DISCONNECTED AND
ARRANGE THE NECESSARY WARNING SIGNS TO PREVENT THEIR ACCIDENTAL START-UP SO
THAT THE VOLTAGE WILL NOT APPEAR ON THE CABLE.
2.6.1. Maximum power supply currents
The currents given in the table below are for the maximum system power, depending on the
system power. The given currents are used to select appropriate protections in the supply,
battery and receiving line as well as appropriate cable cross-sections. Currents given for 230 /
400Vac installations.
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Table 2.1. Power supply current table
System
MY30K
MY30K
Work configuration
3:3
3:1
Housing dimension [mm]
(W x D x H)
300 x 834 x 1250 mm
Rectifier
supply
Max current [A]
65,7
65,7
Bypass supply
Max current [A]
65,7
197,1
Output
Nominal current
[A]
45,5
136,4
Warning
The power supply requires a PE protective conductor. Incorrect connection of the protective
conductor can cause the EMI filters to malfunction and result in electric shock or fire.
2.6.2. Connecting the AC cables
Warning
The operations described in this section should be performed by a properly trained service
team. The ordering party is responsible for the preparation of the power supply and receiving
installation for the power supply.
The COVER MY UPS can operate in the configuration 3/3 (3 supply phases / 3 output phases)
and 3/1 (3 supply phases / 1 output phase). By default, the power supply is configured to work
in a 3: 3 system. Changing the operating system to the 3/1 mode requires switching the wires
located under the mask below the connection terminals and reconfiguring the power supply by
bridging the power supply on the bypass terminals and output terminals.
Figure 2.7. View of the terminal strip for connecting MY 30K wires
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Figure 2.8. Wiring view for configuration of 3/3 or 3/1 operating mode
(visible connection is valid for mode 3/3)
Figure 2.9. View of cabling connection to the power supply operating in 3/3 configuration (two-line power supply - on the left
or single-line power supply - on the right)
In the case of the configuration of the power supply to the 3/1 mode, switch the wiring of the
operating mode according to the connection diagram below, and then bridge the UPS terminal
terminals according to Figure 2.11.
Figure 2.10. View of the necessary wiring changes from the 3/3 system to work in the 3/1 system

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Figure 2.11. View of the terminal strip prepared for connection of 3/1 wires
After the power supply is properly positioned and secured against movement, connect the wires
according to the following rules:
1. 1. Check that the UPS is completely disconnected from the external power source and that
the service bypass switch on the UPS is open. Make sure these power sources are electrically
isolated and post the necessary warning signs to prevent accidental activation.
2. 2. Configure the operating system of the power supply 3/3 (default) or 3/1 as shown in the
figures above.
3. Remove the cover to gain access to the place where the power cables are inserted.
4. Connect the protective earth conductor. The connection must comply with local regulations
and applicable standards.
5. Connect the UPS (rectifier and bypass) power supply and the receiving cables.
Warning - Dangerous voltage at the battery terminals
6. Install the protective cover and the power supply bezel
2.6.3. Battery connection
UPS enables connection of internal batteries in the maximum amount of 2 x 40 AGM VRLA 9Ah
/ 12V batteries. Each of the internal battery chains is protected by a battery breaker located on
the rear of the UPS and labeled Battery1 and Battery2.
If the UPS is equipped with external batteries, they must be protected with an additional battery
disconnector equipped with appropriate fuse links. The external batteries are connected via the
delivered original cables equipped with terminals for connection to the UPS inputs described as
External battery cabinet 1 and External battery cabinet 2. Both external battery inputs must be
connected with external batteries according to the diagram below, depending on the number
of strings external:
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+
-
……
NO.1
Battery cabinet
NO.2 NO.16
NO.3
NO.17 NO.18 NO.32
NO.19
+
-
+
- -
+
-
……
+
-
+
- -
UPS
BATT. -
BATT. +
+
+
BATT. N
BATT. -
BATT. +
BATT. N
EXTERNAL BATTERY CABINET 2EXTERNAL BATTERY CABINET 1
+
-
N
DC
Breaker 1
DC
Breaker 2
+
-
N
Figure 2.12. Diagram of connection of external batteries for a single chain
+
-
……
NO.1
Battery cabinet 1
NO.2 NO.16
NO.3
NO.17 NO.18 NO.32
NO.19
+
-
+
- -
+
-
……
+
-
+
- -
+
-
……
NO.1
Battery cabinet 2
NO.2 NO.16
NO.3
NO.17 NO.18 NO.32
NO.19
+
-
+
-
+
-
+
-
……
+
-
+
-
+
-
UPS
BATT. -
BATT. +
+
+
BATT. N
BATT. -
BATT. +
BATT. N
DC
Breaker 1
DC
Breaker 2
EXTERNAL BATTERY CABINET 2EXTERNAL BATTERY CABINET 1
+
-
N
+
-
N
Figure 2-13 Diagram of connection of external batteries with two battery chains

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Figure 2.24. View of the original terminals for connecting external batteries
2.7. Communication
The communication interface of the COVER MY 30K power supply is located on the back of the
power supply, and consists of DryContact potential-free connectors (1 and 3), a parallel
operation connector (2 - optional), two communication card slots (6 and 7 - optional) and a
communication connector Modbus RTU / RS485 (5). There is also a USB port behind the front
LCD panel.
Figure 2-15. MY 30K communication interface
2.7.1. Dry Contact IN / OUT communicationomun
The COVER MY 30K UPS is equipped with DryContact communication as standard.
The UPS has five output contacts (Dry contact 1) and two input contacts (Dry contact 2).

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Figure 2.16 DryContact In / OUT interface
No.
Connector description
Function
Comments
Dry contact 1
OUT.1
NC
Default setting:
Main power is missing or parameters are out of
tolerance.
NC - normally closed
contact.
NO - normally open
contact.
COM - common
terminal.
Valid values: 24V /
1A.
NO
COM
OUT.2
NC
Default setting:
No bypass power or parameters out of tolerance.
NO
COM
OUT.3
NC
Default setting:
Battery error or battery parameters incorrect.
NO
COM
OUT.4
NC
Default setting:
Output error.
NO
COM
OUT.5
NC
Default setting:
Output overload.
NO
COM
Dry contact
2
EPO
-
EPO uses the NC connection. The EMERGENCY
STOP is activated by disconnecting the pins.
-
IN.1
-
Default setting:
Charge lock - NC signal.
Each of the Dry Contact inputs / outputs can be configured according to the states / events
listed in the table below:
Table 2.2. Input signals (Dry Contact 2 - input IN.1)
No.
Signals available
Description
1
Charging lock
When the UPS receives a signal at input IN.1, the UPS generates an Alarm
and shuts down the battery charging circuit.

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No.
Signals available
Description
2
External bypass ON
When the UPS receives a signal at input IN.1, the inverter is automatically
turned off and the bypass mode is activated.
3
Battery breaker
When theUPSreceives asignal atinputIN.1,theUPS generates analarm
related to disconnecting the battery circuit.
4
On/Off UPS
When the UPS receives a signal at input IN.1, the UPS turns on or off the
inverter depending on the current operating status.
5
Battery drain
When theUPSreceives asignal atinput IN.1, the UPS generates an alarm
related to a ground fault in the battery circuit
6
Discharge lock.
When the UPS receives a signal at input IN.1, the UPS generates an Alarm
and turns off the battery operation.
Table 2.1. Output signals (Dry Contact 1 - OUT.x output)
No.
Signals available
Description
1
No Supply
The occurrence of the event occurs when the primary rectifier power
supply fails, or when the power supply parameters are outside the
tolerance range.
2
No bypass
The occurrence of the event occurs when the bypass power supply fails,
or when the power supply parameters are outside the tolerance range.
3
Battery error
The event occurs when the battery is connected, the battery voltage is low,
the so-called BatLow, high battery voltage or high battery temperature.
4
No Output
An event occurs when the output power is disconnected or the output
power is incorrect.
5
Output overload
The event occurs when the nominal output power of the UPS is exceeded.
6
General alarm
An event occurs when any alarm is generated by the UPS.
7
Normal mode
The event occurs during normal operation of the UPS from the inverter.
8
Battery mode
The event occurs when the UPS is running on battery.
9
Bypass mode
The event occurs when the UPS is operating in the bypass.
10
On/Off UPS
The event occurs when the UPS is turned on.