Gamatronic POWER PLUS Quick start guide

Har Hotzvim Industrial Park,
14 Hartom St., PO Box 45029, Jerusalem 91450, Israel
Tel: [phone] Fax: [phone]
Email: [email protected] Website: www.gamatronic.com
P
PO
OW WE ER R+ +
M
Mo od du ul la ar r U UP PS S s sy ys st te em m
1
10 0 k kV VA A t to o 1 10 00 0 k kV VA A, , 3 3x x4 40 00 0 V V
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Te ec ch hn ni ic ca al l G Gu ui id de e
Release 2.1, September 2009

Power+ Technical Guide
ii
Gamatronic Electronic Industries Ltd.
Har Hotzvim Industrial Park
14 Hartom St., PO Box 45029, Jerusalem 91450 Israel
Tel: [phone] Fax: [phone]
Email: [email protected] Website: www.gamatronic.com
The equipment described in this document is not intended to be used in connection with any
application requiring fail-safe performance, unless the application design includes appropriate
redundancy. This exclusion includes, but is not limited to, the direct operation of any life support
system or any other system whose failure could lead to serious injury, death, environmental damage
or mass destruction.
©Copyright 2009 by Gamatronic Electronic Industries Ltd. All rights reserved worldwide.
The information contained in this document is proprietary and is subject to all relevant copyright, patent and other laws protecting
intellectual property, as well as any specific agreement protecting Gamatronic Electronic Industries Ltd. rights in the aforesaid
information. Neither this document nor the information contained herein may be published, reproduced or disclosed to third parties,
in whole or in part, without the express, prior, written permission of Gamatronic Electronic Industries Ltd. In addition, any use of this
document or the information contained herein for any purposes other than those for which it was disclosed is strictly forbidden.
Gamatronic Electronic Industries Ltd. reserves the right, without prior notice or liability, to make changes in equipment design or
specifications.
Information supplied by Gamatronic Electronic Industries Ltd. is believed to be accurate and reliable. However, no responsibility is
assumed by Gamatronic Electronic Industries Ltd. for the use thereof nor for the rights of third parties which may be affected in any
way by the use thereof.
Any representation(s) in this document concerning performance of Gamatronic Electronic Industries Ltd. product(s) are for
informational purposes only and are not warranties of future performance, either express or implied. Gamatronic Electronic
Industries Ltd. standard limited warranty, stated in its sales contract or order confirmation form, is the only warranty offered by
Gamatronic Electronic Industries Ltd. in relation thereto.
This document may contain flaws, omissions or typesetting errors; no warranty is granted nor liability assumed in relation thereto
unless specifically undertaken in Gamatronic Electronic Industries Ltd. sales contract or order confirmation. Information contained
herein is periodically updated and changes will be incorporated into subsequent editions. If you have encountered an error, please
notify Gamatronic Electronic Industries Ltd. All specifications are subject to change without prior notice.

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TABLE OF CONTENTS
1. SYSTEM STRUCTURE........................................................................................................ 1
2. FUNCTIONAL OVERVIEW.................................................................................................. 4
2.1 UPS Basic Module (10kVA / 8KW).......................................................................... 4
2.1.1 Single UPS Module Specifications ....................................................... 9
2.2 UPS System Controller ......................................................................................... 10
2.2.1 System Controller Specifications ....................................................... 12
2.3 Static Switch (ST/SW) Module.............................................................................. 12
3. SYSTEM INTERCONNECTION......................................................................................... 15
3.1 internal System wiring .......................................................................................... 16
3.1.1 The Power+ always requires a neutral line........................................ 20
3.1.2 UPS Module – Connectors Description.............................................. 24
3.1.3 UPS Module Pin Assignment Table.................................................... 25
3.2 DC Distribution Panel Cabling ............................................................................. 26
3.2.1 DC Fuses ............................................................................................... 28
3.3 AC Input Fuses ...................................................................................................... 29
3.4 AC Distribution Compartment.............................................................................. 30
3.5 AC Input/Output Main Terminals.......................................................................... 31
3.6 Static Switch Connections ................................................................................... 32
3.7 System Controller Connections........................................................................... 33
3.7.1 PC714 – the controller card................................................................. 33
3.8 Setting the Shelf Address..................................................................................... 36
3.9 F.A.Q. (Frequently Asked Questions).................................................................. 39
3.9.1 Batteries ................................................................................................ 39
3.9.2 General................................................................................................... 40
3.9.3 Menus..................................................................................................... 41
3.9.4 Installation............................................................................................. 42
3.9.5 Mechanics ............................................................................................. 43
3.9.6 Common problems............................................................................... 43
4. SYSTEM INSTALLATION ................................................................................................. 45
4.1 Inspections to be Performed Prior to Installation.............................................. 47
4.2 Installation Procedure and System Start-up....................................................... 48
4.3 Initial Start-up Sequence ...................................................................................... 49
4.4 Checks to be Performed Following Initial Startup............................................. 51
4.5 Special considerations for 1-phase output......................................................... 52
4.5.1 Dip-switch settings on the modules................................................... 52
4.5.2 Wiring of input and output terminals.................................................. 52
4.5.3 System start-up..................................................................................... 53
4.6 DIP switch settings of the UPS modules ............................................................ 54
5. USING THE SYSTEM CONTROLLER.............................................................................. 55
5.1 System information display.................................................................................. 56
5.2 Display UPS module data ..................................................................................... 59
5.3 Setting the Number of UPS Modules................................................................... 61
5.4 Retrieving History (LOG of Events) ..................................................................... 62
5.5 System Controller Alarms..................................................................................... 65
6. BATTERIES .......................................................................................................................66
6.1 Batteries and Configurations ............................................................................... 66
6.1.1 Internal Batteries .................................................................................. 66
6.1.2 External Batteries ................................................................................. 67
6.2 Installing and connecting the Batteries .............................................................. 67

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6.2.1 Configuring the batteries to the system............................................. 69
7. DRY CONTACTS AND ALARM TERMINALS.................................................................. 70
7.1 DC Current measurement..................................................................................... 71
7.2 Temperature sensor.............................................................................................. 71
7.3 User-defined alarms.............................................................................................. 71
8. PERIODIC MAINTENANCE .............................................................................................. 72
8.1 Objectives of the Periodic Maintenance ............................................................. 72
8.2 Recommended Tools ............................................................................................ 72
8.3 Maintenance Procedures and Report.................................................................. 73
9. TROUBLESHOOTING....................................................................................................... 76
10. SYSTEM CONTROLLER & COMMUNICATIONS............................................................ 80
10.1 Introduction............................................................................................................ 80
10.2 SCC POWER+ characteristics.............................................................................. 80
10.3 Controller User Interface ...................................................................................... 81
10.4 Service Utilities...................................................................................................... 81
10.4.1 Start-up Screens................................................................................... 81
10.4.2 The Main Menu...................................................................................... 84
11. SETUP PROCEDURES..................................................................................................... 85
11.1 Setting Alarm Thresholds..................................................................................... 85
11.1.1 Setting Alarm Vibration Parameters................................................... 86
11.1.2 Setting the Integration Factor for Alarms .......................................... 86
11.1.3 'Auto' Test Batteries............................................................................. 86
11.2 Setting Password Level 1.....................................................................................86
11.3 Adding a POWER module..................................................................................... 87
11.4 System Controller setup verification................................................................... 88
11.4.1 ACCESS................................................................................................. 88
11.4.2 SCREEN 1.............................................................................................. 88
11.4.3 SCREEN 2.............................................................................................. 89
11.4.4 SCREEN 3.............................................................................................. 89
12. REPLACEMENT PROCEDURES...................................................................................... 90
12.1 UPS module............................................................................................................ 90
12.2 System Controller module.................................................................................... 91
12.3 Static Switch module ............................................................................................ 92
12.4 Replacing the controller's flash memory............................................................ 93
13. USING SERVICE PROGRAMS......................................................................................... 95
13.1 Access to Service Mode ....................................................................................... 95
13.2 Selecting the Controller’s Low Level Utilities .................................................... 96
13.3 Setting the Network Addresses........................................................................... 96
13.3.1 Setting the SNMP Factor...................................................................... 96
13.4 Configuring Dry Contacts and Alarms................................................................ 97
13.4.1 Linking Alarms to Dry Contacts.......................................................... 97
13.4.2 Enabling and disabling specific alarms............................................. 97
13.5 Calibrating Measurements.................................................................................... 98
13.6 Controller Self-Test ............................................................................................... 98
13.7 Battery Test............................................................................................................ 98
13.7.1 Periodic/Automatic Battery Test......................................................... 98
14. MONITORING THE SYSTEM............................................................................................ 99
14.1 Power Meter ........................................................................................................... 99
14.2 System Operating Times..................................................................................... 100

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14.3 Main DIP Switch Status....................................................................................... 100
14.4 Panel and Slave DIP Switch Status ................................................................... 101
14.5 SC POWER+ Internal Power Supply..................................................................101
14.6 System Temperature........................................................................................... 101
14.7 Internal Communication ..................................................................................... 102
14.8 Monitoring System Components ....................................................................... 103
14.8.1 Monitoring the Batteries .................................................................... 103
14.8.2 Monitoring Alarms.............................................................................. 104
14.9 After Using the Emergency Power Off .............................................................. 104
15. SYSTEM SPECIFICATIONS ........................................................................................... 105
16. SYSTEM MODULES ORDERING INFORMATION......................................................... 106
LIST OF FIGURES
Figure 1-1: Block diagram ...................................................................................................... 1
Figure 1-2: Sub-assemblies.................................................................................................... 2
Figure 1-3: 10kVA configuration............................................................................................ 2
Figure 1-4: 50kVA configuration............................................................................................ 3
Figure 1-5: 100kVA configuration.......................................................................................... 3
Figure 2-1: Single UPS Module- Front/Rear View ................................................................ 4
Figure 2-2: Block diagram of a single UPS Module ............................................................. 5
Figure 2-3: Power section of the PFC in a single UPS module .......................................... 6
Figure 2-4: Input currents of the PFC (without filters) ........................................................ 6
Figure 2-5: PFC control scheme ............................................................................................ 7
Figure 2-6: DC/AC inverter principal topology..................................................................... 8
Figure 2-7: System controller - Front panel........................................................................ 10
Figure 2-8: System controller - Block diagram................................................................... 11
Figure 2-9: ST/SW front panel view ..................................................................................... 13
Figure 2-10: ST/SW block diagram ...................................................................................... 13
Figure 2-11: 3-Phase ST/SW block diagram ....................................................................... 14
Figure 3-1: Power+ system - Modular structure................................................................. 15
Figure 3-2: Schematic of a 3:1 Phase 30kVA POWER+ System....................................... 16
Figure 3-3: Schematic of a 3-Phase 30kVA POWER+ System.......................................... 17
Figure 3-4: POWER+ System - Rear View ........................................................................... 18
Figure 3-5: Control PCB and flat cable................................................................................ 19
Figure 3-6: Wrong way to connect UPS with grounded-neutral-generator..................... 21
Figure 3-7: Acceptable connection for grounded generator and 4-pole switch............. 22
Figure 3-8: Preferred generator (neutralized) and connection (3-pole)........................... 23
Figure 3-9: UPS module – Rear view................................................................................... 24
Figure 3-10: UPS module connectors - Pin assignments ................................................. 24
Figure 3-11: DC distribution panel (50KVA model)............................................................ 27
Figure 3-12: DC distribution. panel (100kVA model) ......................................................... 27
Figure 3-13: DC fuses on front side of DC dist. panel (50KVA model)............................ 28
Figure 3-14: DC fuses on front of DC dist. panel (100KVA model) .................................. 28
Figure 3-15: UPS modules - AC input fuses (100KVA model) ........................................... 29
Figure 3-16: AC input fuse assignments (50KVA model).................................................. 29
Figure 3-17: AC distribution ................................................................................................. 30
Figure 3-18: AC distribution panel (100KVA model).......................................................... 30
Figure 3-19: AC distribution panel (50KVA model)............................................................ 30
Figure 3-20: Input & output main terminals........................................................................ 31
Figure 3-21: Static switch terminals –Rear view ............................................................... 32
Figure 3-22: System controller outside the shelf - Rear view........................................... 33
Figure 3-23: Front side of PC714 card................................................................................. 34
Figure 3-24: Rear of PC714 –white rectangle indicates jumper area.............................. 34
Figure 3-25: The jumpers on PC714 .................................................................................... 34
Figure 3-26: The PC917 Control PCB on a shelf –general view....................................... 36

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Figure 3-27: DIP switches on PC719 card–close-up......................................................... 37
Figure 3-28: Recommended master/slave DIP switch settings........................................ 37
Figure 3-29: DIP switch settings........................................................................................... 38
Figure 4-1: POWER+ system connections.......................................................................... 45
Figure 4-2: Switch and wire ratings for 10-100kVA installation ....................................... 46
Figure 4-3: Start-up screen 1................................................................................................ 49
Figure 4-4: Start-up screen 2................................................................................................ 49
Figure 4-5: Start-up screen 3................................................................................................ 49
Figure 4-6: Start-up screen 4................................................................................................ 49
Figure 4-7: Normal display of the controller LCD (default)............................................... 50
Figure 4-8: Example of dip switch setting for 3/3 phase, 50 Hz UPS............................... 53
Figure 5-1: The controller’s main menu.............................................................................. 55
Figure 5-2: Main menu option 1 ("System")........................................................................ 56
Figure 5-3: System DC voltages........................................................................................... 56
Figure 5-4: Output power factor 1........................................................................................ 57
Figure 5-5: Input power factor 1........................................................................................... 57
Figure 5-6: Overall phase voltages/currents ...................................................................... 57
Figure 5-7. General timers and counters ............................................................................ 57
Figure 5-8. Jumper setting and general information ......................................................... 58
Figure 5-9. Internal controller voltages............................................................................... 58
Figure 5-10: Main Menu option 2 (“UPS Module”) .............................................................. 59
Figure 5-11: LCD Panel –Selection ..................................................................................... 60
Figure 5-12: Module phase voltages/currents.................................................................... 60
Figure 5-13: Battery voltages, I-active current ................................................................... 60
Figure 5-14: Controller menu #2 ..........................................................................................61
Figure 5-15: Controller menu #3 ..........................................................................................61
Figure 5-16: Controller menu #4 ..........................................................................................61
Figure 5-17: Number of UPS modules................................................................................. 61
Figure 5-18: Log display ....................................................................................................... 62
Figure 6-1: 40kVA N+1 System with Internal Batteries...................................................... 66
Figure 6-2: Internal Battery Drawer –Exploded View........................................................ 67
Figure 6-3: Connection diagram for external battery ........................................................ 68
Figure 7-1: Location of dry contacts at rear of POWER+ controller module .................. 70
Figure 7-2: Dry Contacts “group A”(as per Figure 7-1).................................................... 70
Figure 7-3: Dry Contacts “group B”(as per Figure 7-1).................................................... 71
Figure 9-1: UPS module front panel .................................................................................... 76
Figure 12-1: PC575 ................................................................................................................ 93
Figure 12-2: Extracting the EPROM..................................................................................... 93
Figure 13-1: Low level utility menu (SC2012 menu) .......................................................... 96
Figure 14-1: Key panel .......................................................................................................... 99
LIST OF TABLES
Table 2-1 Single UPS Module Specifications........................................................................ 9
Table 2-2: System controller specifications ....................................................................... 12
Table 3-1: UPS module pin assignment and function ....................................................... 25
Table 3-2: Jumpers on PC714 .............................................................................................. 35
Table 3-3: DIP switch setup in a 100kVA system (X = don't care).................................... 38
Table 4-1: Power Configuration DIP Switch Settings........................................................ 53
Table 5-1: Controller main menu options ............................................................................ 55
Table 5-2: Format of log messages ..................................................................................... 62
Table 5-3: Log Messages "description" field...................................................................... 63
Table 5-4: Static Switch transfer code (for LOADBP event) ............................................. 64
Table 5-5: System controller alarms..................................................................................... 65
Table 9-1: UPS Module Indicators........................................................................................ 77
Table 9-2: Troubleshooting table......................................................................................... 78
Table 10-1: General information screen.............................................................................. 83

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Table 10-2: Main Menu functions......................................................................................... 84
Table 11-1: Setup Menu options .......................................................................................... 85
Table 11-2: Setting alarm thresholds .................................................................................. 85
Table 13-1: Calibrating battery current measurements..................................................... 98
Table 14-1: Time displays................................................................................................... 100
Table 14-2: Main dip switch statuses ................................................................................ 100
Table 14-3: Panel and slave dip switch statuses ............................................................. 101
Table 14-4: Controller external and internal power statuses.......................................... 101
Table 14-5: System temperature displays......................................................................... 101
Table 14-6: Battery test information .................................................................................. 103
Table 15-1: Technical specifications................................................................................. 105
Table 16-1: Ordering parts.................................................................................................. 106

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WARNING: RISK OF
SEVERE DAMAGE TO THE UPS!!!
THIS SYSTEM USES THE NEUTRAL LINE FOR
OPERATION.THEREFORE,IT IS STRICTLY
FORBIDDEN TO CONNECT THIS SYSTEM TO
THE AC POWER SOURCE WITHOUT A NEUTRAL
(NULL)CONDUCTOR!!
FAILURE TO USE A NEUTRAL CONDUCTOR MAY
CAUSE PERMANENT DAMAGE TO THE SYSTEM.
IN THE EVENT THAT SYSTEM OUTPUT CAPACITY IS INCREASED ABOVE THE
ORIGINAL FACTORY CONFIGURATION, THE SYSTEM NAMEPLATE MUST BE
UPDATED TO INDICATE THE NEW POWER AND CURRENT CAPACITY.
This condition applies when new, non-redundant power modules are added to the
system or when formerly redundant modules are designated as non-redundant.

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1. SYSTEM STRUCTURE
The Power+ is a parallel redundant UPS. A block diagram is shown in Figure 1-1 below.
UPS
10KVA
UPS
10KVA
Static Switch
RS232, TCP/IP, Cellular,
Centralized
UPS
10KVA
Mains Powe
r
Outpu
t
Isolation
T
ransformer
(optional)
Bypass Powe
r
UPS
10KVA
System
Controller
Figure 1-1: Block diagram

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The system comprises the following sub-assemblies.
1-10 UPS modules × 10kVA (4 in the example in Figure 1-2 below)
System Controller
Static Switch Module
Power Distribution Block
Figure 1-2: Sub-assemblies
Figure 1-3: 10kVA configuration

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Figure 1-4: 50kVA configuration
Figure 1-5: 100kVA configuration

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2. FUNCTIONAL OVERVIEW
2.1 UPS BASIC MODULE (10KVA / 8KW)
The UPS Basic Module is the core of the system, which comprises 1 to 10 identical parallel
modules depending on capacity requirements.
A general module view is shown in Figure 2-1. The module classic on-line double-conversion
type block diagram is illustrated in Figure 2-2.
This design has proved to be very stable. No transfer time is required for the UPS to switch
from normal to backup mode; the load is supplied constantly by stable and clean power. A
Power Factor Correction (PFC)1is responsible for the low Total Harmonic Distortion (THD) and
unity Power Factor (PF) at the input.
The input voltage(s) is converted to a stable ±425V at the DC link.
This stage can maintain current sharing between the three input phases as well as among
other parallel units, because of the current sharing signal that it produces.
Figure 2-1: Single UPS Module- Front/Rear View
1PFC is a feature included that reduces the amount of generated reactive power. Reactive power
operates at right angles to true power and energizes the magnetic field. Reactive power has no real
value for an electronic device, but electric companies charge for both true and reactive power resulting in
unnecessary expense.
In power factor correction, the power factor (represented as "k") is the ratio of true power (kwatts) divided
by reactive power (kvar). The power factor value is between 0.0 and 1.00. If the power factor is above
0.8, the device is using power efficiently. A standard power supply has a power factor of 0.70–0.75, and
a power supply with PFC has a power factor of 0.95–0.99.

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Figure 2-2: Block diagram of a single UPS Module

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The PFC power section block diagram is shown in Figure 2-3. Input currents of the PFC
(without filters) is shown in Figure 2-4; the control scheme is illustrated in Figure 2-5.
-+
T
Control
-+
+
Ir
+
Control
Is
Control
N
-+
R S
It
Figure 2-3: Power section of the PFC in a single UPS module
Ir Is
It
(CCM) t
-Ipeak
Ipeak
Figure 2-4: Input currents of the PFC (without filters)
As shown in Figure 2-3, the PFC section operates in Continuous Current Mode (CCM)
conduction, which has many advantages. Input currents are shaped in such a way that they
follow the input voltages with precision.
This makes the system appear to be nothing more than a resistive load with respect to the line
voltage. In other words, the system corrects the input current waveform of the connected load,
and acts as an active power filter.
The PFC section also draws symmetrical currents from each phase, and maintains good
current sharing among identical UPS modules in parallel.
Each phase input is sensed for voltage and current, required to force the input current drawn
from the phase input to follow its voltage and emulate a resistor. Two feedback loops are

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required for the proper operation, an inner current loop for maintaining a correct wave shape
and an outer voltage loop to ensure a correct DC output level.
The voltage sample (k*Vin) is multiplied by the error voltage from a common voltage feedback
amplifier (Integrator). The result is than compared to the actual sampled phase current which
forces the current amplifier current to follow the phase input voltage. The output of the
integrator is connected to a current sharing bus causing all other modules to be connected to
this bus via the same resistor. This ensures that all the multipliers of each UPS module receive
the same input and all that modules are equally loaded.
K2*Vout
Comparator
Triangle
NEUTRAL
MULT
Triangle
PWM
Comparator
Integarator
PH1
NEUTRAL
Current
Amplifier
Current
Amplifier
+
-
Vout (DC)
+
-
POWER
BLOCK
NEUTRAL
Comparator
POWER
BLOCK
Triangle
+
-
MULT
K1*V1
POWER
BLOCK
PWM
+
-
+
-
K1*V3
Current
Amplifier
+
-
K1*V2
PH3
Vref
PWM
MULT
Verror
PH2
DC
share
bus
+
-
Figure 2-5: PFC control scheme

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The second stage of the UPS module is the DC/AC inverter.
This stage is fed by the DC symmetrical voltage produced by the PFC stage which then it
inverts to create clean sinusoidal output(s).
POWER+ employs “3-L” (3-level) topology which achieves very high efficiency (over 96%)
which in turn enhances the overall AC-AC efficiency of the entire system.
As shown in Figure 2-6 the inverter voltage is produced using three levels of DC voltage (unlike
standard two-level system).
The POWER+ inverter uses Insulated Gate Bipolar Transistors (IGBT) as efficient high
frequency switches.
Apart from the AC/DC PFC and DC/AC inverter each UPS module also contains a digital
controller, responsible for all the control mechanism and all communications with other modules
of the system.
Each UPS module also provides the system controller with a report related to its condition and
operation status. All the data available from all modules is displayed on an LCD display.
The UPS module is cooled using forced convection. The fan varies with the load level, making
for improved reliability, reduced noise, and less dust is introduced.
Vr
C
Vs
C
Vt
+
N
-+-+
+
C
-+
L
L
Control
L
Figure 2-6: DC/AC inverter principal topology

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2.1.1 SINGLE UPS MODULE SPECIFICATIONS
Table 2-1 Single UPS Module Specifications
TECHNICAL DATA – UPS MODULE
Output Rated Power 10 kVA / 8 kW
Topology Online Battery, Double Conversion
Construction Modular parallel hot-plugged modules
Input Voltage (V) 3 × 400+N (3 × 230 V)
Input Voltage range (%) -27 and +20
Input Current (A) 15 A
Input Frequency (Hz) 47–63 Hz
Frequency tracking range (Hz) ±1, ±2, ±3 (selectable)
Output slew rate 1 Hz/sec
Power walk-in (sec) > 60
Input Power Factor 0.99
Input THDI (%) 5
Output Voltage (V) 3 × 400+N (3 × 230V)
Output Static Regulation (%) ±1
Output Regulation for unbalanced load (%) ±1 for 100% unbalanced load
Dynamic response to 100% load step (%) 2
110 % for 10 minutes
125 % for 60 seconds
Overload
1000 % for 1 cycle
Output Waveform Sinusoidal
Output THD (%) Less than 2 for linear load
Load CF (max) 6:1
Fuse clearance capability Input, Output, DC link
AC-AC efficiency (nominal) Up to 96 at full load
Maximum power dissipation (Po=8KW) 421 W (1437 BTU)
-10 to +40 (operating)
Ambient temperature (ºC) -20 to +60 (storage)
Relative humidity (%) 95 max non-condensing
Altitude (m) 1500 w/o de-rating
DC-Link Voltage ±340 V to ±425 V
Cooling system Forced air: multi-fan with speed control
Dimensions: W x H x D 19" x 2U x 455 mm (Excluding shelf)
Weight 9.5 Kg

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2.2 UPS SYSTEM CONTROLLER
The POWER+ system controller is designed primarily for monitoring, diagnostics and
communications.
Some other useful features include temperature compensation of the battery voltage.
The POWER+ can work without the system controller but with reduced functionality.
Figure 2-8 shows the system controller block diagram. The core of the controller is a powerful
embedded micro-controller, surrounded by many peripherals (analog, digital, communication).
The controller front panel is shown in Figure 2-7.
Figure 2-7: System controller - Front panel

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Figure 2-8: System controller - Block diagram

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2.2.1 SYSTEM CONTROLLER SPECIFICATIONS
Table 2-2: System controller specifications
TECHNICAL DATA – SYSTEM CONTROLLER
Micro Controller core 16 bit
Display 4 x 40 characters LCD with backlight
Other indicators 8 LED’s, buzzer
Analog input channels 4
Digital input channels 8
Real Time Clock (RTC) Yes, with backup
Power meter kVA, kW, PF
Voltage-free outputs (dry contacts) 6
RS232 user port Yes, isolated
Optional communication TCP/IP, GPRS/SMS Wireless
communication (Optional)
Communications with system modules Serial, isolated
Events log 255 events
System operation without controller Unchanged
On-screen parameters Load bar-graph
3-phase voltages
3-phase currents
Battery voltage
Status of each UPS module
Static-switch parameters and status
Battery sensor temperature
Alarms AC abnormal
DC abnormal
UPS module(s) failure
Load on bypass
Battery test failed
Over/under temperature
Overload
RTC operation without power 2 weeks
Power requirements 12V±10%, 1A via 2.1mm phono jack
2.3 STATIC SWITCH (ST/SW) MODULE
The static switch module is used for overriding the input to output in case of a system failure or
heavy load start or if specifically requested by the user.
The module receives two AC inputs and supplies only one.
Generally the ST/SW connects the output of the paralleled UPS modules to the main output of
the system. However, if the modules fail to provide an adequate voltage for a determined time,
i.e. detection time, the ST/SW module instantly switches to the alternative power source, that is
the AC input, as illustrated in Figure 2-10. The unit employs an efficient AC switch for this
purpose using a combination of fast semiconductors and an electromechanical relay.
The module monitors all the inputs in real time to determine the method of operation. The
ST/SW module’s front panel is shown in Figure 2-9.