Delta Ultron GES203HH33A035 User manual

Delta UPS - Ultron Family
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HPH Integrated Battery Series, Three Phase
20/30/40 kVA
User Manual
NORMAL
BATTERY
BYPASS
FAULT
ON OFF
ESC

ii
Ultron HPH Integrated Battery Series
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Copyright © 2014 by Delta Electronics Inc. All Rights Reserved. All rights of this User Manual
(“Manual”), including but not limited to the contents, information, and figures are solely owned and
reserved by Delta Electronics Inc. (“Delta”). The Manual can only be applied to the operation or the

extraction, or usage of this Manual in whole or in part is prohibited without the prior written permission
of Delta. Given that Delta will continuously improve and develop the product, changes may be made
to the information in this Manual at any time without obligation to notify any person of such revision
or changes. Delta will make all possible efforts to secure the accuracy and the integrity of this
Manual. Delta disclaims any kinds or forms of warranty, guarantee, or undertaking, either expressly
or implicitly, including but not limited to the completeness, faultlessness, accuracy, non-infringement,

This manual contains important instructions and warnings that you should follow
during the installation, operation, storage and maintenance of this product. Failure
to heed these instructions and warnings will void the warranty.

iii
Table of Contents
Table of Contents
Chapter 1 : Important Safety Instructions
1.1 Placement Warnings ----------------------------------------------------------------- 1
1.2 Connection Warnings ---------------------------------------------------------------- 1
1.3 Usage Warnings ---------------------------------------------------------------------- 1
1.4 Storage Warnings--------------------------------------------------------------------- 3
1.5 Glossary of Symbols ----------------------------------------------------------------- 3
1.6 Standard Compliance---------------------------------------------------------------- 4
Chapter 2 : Introduction ------------------------------------------------------------------ 5
2.1 Product Introduction------------------------------------------------------------------ 5
2.2 Package Inspection ------------------------------------------------------------------ 5
2.3 Functions and Features ------------------------------------------------------------ 7
Chapter 3 : Appearance and Mechanism-------------------------------------------- 9
3.1 Appearance and Dimensions ------------------------------------------------------ 9
3.2 Front View ------------------------------------------------------------------------------ 9
3.3 Front View with Door Open ------------------------------------------------------ 10
3.4 Control Panel ------------------------------------------------------------------------ 12
3.5 Rear Panel---------------------------------------------------------------------------- 13
Chapter 4 : Operation Modes ----------------------------------------------------------16
Chapter 5 : Communication Interfaces ---------------------------------------------20
Chapter 6 : Installation and Wiring---------------------------------------------------26
6.1 Precautions Prior to Installation and Wiring---------------------------------- 26
6.2 Installation Environment----------------------------------------------------------- 26
6.3 UPS Transportation & Handling------------------------------------------------- 27
6.4 UPS Installation --------------------------------------------------------------------- 27
6.5 Wiring ---------------------------------------------------------------------------------- 29
6.5.1 Precautions Prior to Wiring--------------------------------------------- 29
  -------------------------------- 32

iv
Ultron HPH Integrated Battery Series
6.5.3 Single Unit Wiring--------------------------------------------------------- 35
6.5.4 Parallel Units Wiring ----------------------------------------------------- 42
6.6 External Battery Cabinet Connection Precautions ------------------------- 45
Chapter 7 : Operation---------------------------------------------------------------------49
7.1 Connecting the UPS with the Utility AC Power------------------------------ 49
7.2 Turn-on -------------------------------------------------------------------------------- 49
7.3 Turn-off -------------------------------------------------------------------------------- 49
Chapter 8 : LCD Display and Settings ----------------------------------------------51
8.1 LCD Display Hierarchy ------------------------------------------------------------ 51
8.3 Parallel Screen ---------------------------------------------------------------------- 53
8.4 Main Menu---------------------------------------------------------------------------- 54
8.5 Measure------------------------------------------------------------------------------- 55
8.6 Maintenance ------------------------------------------------------------------------- 56
Chapter 9 : Optional Accessories ----------------------------------------------------59
Chapter 10 : Maintenance ---------------------------------------------------------------60
Chapter 11 : Troubleshooting ----------------------------------------------------------61
----------------------------------------------63
Appendix 2 : Warranty--------------------------------------------------------------------65

1
Chapter 1 Important Safety Instructions
Chapter 1 : Important Safety Instructions
1.1 Placement Warnings
yInstall the UPS in a well-ventilated indoor area, away from excess moisture, heat, dust,

yLeave adequate space around all sides of the UPS for proper ventilation. Please refer to 6.2
Installation Environment.
1.2 Connection Warnings
yThe UPS must be well grounded due to a possible risk of current leakage.
yIt is necessary to install protective devices and 4-pole contactors when the UPS is con-
nected to the mains and bypass source. For relevant information, please refer to 6.5.1
Precautions Prior to Wiring.
yThe protective devices connecting to the UPS must be installed near the UPS and must be
easily accessible for operation.
1.3 Usage Warnings
yThis is a class-A product. In a domestic environment, this product may cause radio interfer-
ence, in which case, the user is required to take adequate measures.
yThe UPS can be used to power computers and associated peripheral devices, such as
monitors, modems, cartridge tape drives, external hard drives, etc.
y-
vice personnel.
yIt is strictly forbidden to connect the UPS with any regenerative-type loads.
yThe parallel UPSs can connect with common batteries. Before paralleling batteries, please
make sure the battery voltage difference between each UPS is lower than 5Vdc.
yThe external slits and openings in the UPS are provided for ventilation. To ensure reliable
operation of the UPS and to protect the UPS from overheating, these slits and openings
must not be blocked or covered. Do not insert any object into the slits and openings that
may hinder ventilation.
yIn a low temperature environment (below 0°C), you must allow the UPS to adjust to room
temperature for at least one hour to avoid moisture condensing inside the UPS before us-
age.

2
Ultron HPH Integrated Battery Series
yDo not put beverage containers on the UPS, battery cabinet or any other accessory asso-
ciated with the UPS.
yThe risk of dangerous high voltage is possible when the batteries are still connected to the
UPS even though the UPS is disconnected from the mains. Do not forget to open internal
battery fuse holders and disconnect battery cables to completely cut off the battery source.
For more information about the internal battery fuse holders, please refer to 3.3 Front
View with Door Open.
y-
ing or removing the cover of the UPS to avoid high voltage electric shock.
yDo not open or mutilate the battery or batteries. The released electrolyte is harmful to the
skin and eyes and may be toxic.
y
yThe batteries contain chemical substances that may jeopardize or pollute our environment.
Please contact the supplier shown on the batteries to help to dispose of the batteries.
yA battery can present a risk of electric shock and high short-circuit current. The following
precautions should be observed before replacement of batteries:
1. Remove watches, rings, or other metal objects.
2. Use tools with insulated handles.
3. Wear insulating gloves and boots.
4. Do not lay tools or metal parts on the top of batteries.
5. Disconnect the charging source prior to connecting or disconnecting the batteries’ ter-
minals.
y
1. Liquid is poured or splashed on the UPS.
2. The UPS does not run normally after this User Manual is carefully observed.
NOTE:
If you use the UPS in an area that generates or incurs dust, you should install a dust


3
Chapter 1 Important Safety Instructions
1.4 Storage Warnings
yPrior to Installation
If the UPS needs to be stored prior to installation, it should be placed in a dry area. The al-
lowable storage temperature is between -15°C and +40°C.
yAfter Usage
Press the OFF key ( OFF ) once and the LCD shows the following screen. If you want to
turn off the UPS, please press the DOWN key (). Make sure the UPS is shutdown,
disconnect the UPS from the utility power, open the internal battery fuse holders (please
refer to 3.3 Front View with Door Open), remove all equipment from the UPS, and store
the UPS in a dry and well-ventilated area at a temperature between -15°C and +40°C.
Idle batteries must be recharged fully approximately every three months if the UPS needs
to be stored for an extended period of time. The charging time must not be less than 24
hours each time.
?
6+87'2:1
<(6 12
1.5 Glossary of Symbols
No. Symbol Description
1
NORMAL
Online mode LED indicator: green
2
BATTERY
Battery mode LED indicator: yellow
3
BYPASS
Bypass mode LED indicator: yellow
4
FAULT
Fault LED indicator: red
5ON ON key
6OFF OFF key
7ESC Goes back to previous screen or cancels current selec-
tion.
8Moves down/ Decreases number.
9Moves up/ Increases number.

4
Ultron HPH Integrated Battery Series
No. Symbol Description
10 
11
EPO
EPO key
12 R R phase of AC Input/ UPS Output
13 S S phase of AC Input/ UPS Output
14 T T phase of AC Input/ UPS Output
15 N Input neutral line/ Output neutral line / Battery neutral line
16 For UPS grounding
17 For critical load grounding/ For external battery cabinet
grounding
18 Positive battery terminal
19 Negative battery terminal
1.6 Standard Compliance
This product meets the following safety standards and electromagnetic compatibility (EMC)
inspection standards:
yCE
yIEC62040-1
yGB7260.2-2009/ IEC62040-2 C2
yGB17626-2/ IEC61000-4-2 (ESD) Level 4
yGB17626-3/ IEC61000-4-3 (Radiated Field) Level 3
yGB17626-4/ IEC61000-4-4 (EFT) Level 4
yGB17626-5/ IEC61000-4-5 (Surge) Level 4

5
Chapter 2 Introduction
Chapter 2 : Introduction
2.1 Product Introduction
The HPH Integrated Battery Series UPS (hereinafter referred to as UPS) is a three-phase
four-wire online uninterruptible power supply, which provides reliable and stable sine-wave
power to your electronic devices. The UPS applies the latest design of DSP digital control
-
cy of the entire device can reach up to 96% in online mode and up to 99% in ECO mode.
With its outstanding features, the UPS not only provides safe, reliable and uninterrupted pow-
er to your sensitive electronic equipment at all times, but also produces greater electric power

power levels, 20kVA, 30kVA and 40kVA, for your selection.
2.2 Package Inspection
yExternal
During UPS transportation, some unpredictable situations might occur. It is recommended
that you inspect the UPS exterior packaging. If you notice any damage, please immedi-
ately contact the dealer from whom you purchased the unit.
yInternal
1. Check the rating label on the top of the UPS cabinet and make sure the device No. and
capacity match what you ordered.
2. Examine if any parts are loose or damaged.
3. The UPS package contains the following items. Please check if any items are missing.
(Male) (Female) (Male) (Male)
1 2 3 4
6 7
5
8

6
Ultron HPH Integrated Battery Series
For part No.: GES203HH33A035 & GES303HH33A035 & GES403HH33A035
No. Item 20kVA 30/ 40kVA
1UPS (with 80 internal batteries) 1 PC 1 PC
2User Manual 1 PC 1 PC
3Test Card 1 PC 1 PC
4Software CD-UPSentry 2012 1 PC 1 PC
5Battery Fuse 3 PCS 6 PCS
6RS232 Cable 1 PC 1 PC
7Parallel Cable 1 PC 1 PC
8Mini-card Flat Cable*11 PC 1 PC
For part No.: GES203HH33B035 & GES303HH33B035 & GES403HH33B035
No. Item 20kVA 30/ 40kVA
1UPS (without internal batteries)*21 PC 1 PC
2User Manual 1 PC 1 PC
3Test Card 1 PC 1 PC
4Software CD-UPSentry 2012 1 PC 1 PC
5Battery Fuse 3 PCS 6 PCS
6RS232 Cable 1 PC 1 PC
7Parallel Cable 1 PC 1 PC
8Mini-card Flat Cable*11 PC 1 PC
NOTE:
1. The balance supports have been locked on the pallet when the UPS is shipped
out of the factory. Please keep them well after unpacking. You might use them
for installation.
2. *1: The cable connects the UPS and a Delta Mini SNMP card, Mini USB card,
Mini Relay I/O card, or Mini Modbus card. The above-mentioned cards are op-
tional. Please refer to Chapter 9: Optional Accessories.
3. *2: Please use our suggested type of batteries. For more information, please
contact your local dealer or service personnel.

7
Chapter 2 Introduction
4. If there is any damage or anything missing, please immediately contact the dealer from
whom you purchased the unit.
5. If the UPS needs to be returned, carefully repack the UPS and all of the accessories
using the original packing material that came with the unit.
2.3 Functions and Features
yThe HPH series UPS is designed for systems with medium power. It provides clean power
supply to data systems, communication systems, computer network systems, medical
treatment systems, monitoring systems, factory equipment, etc.
yThe HPH series UPS utilizes all digital high frequency modulation technology, which de-
creases volume, improves reliability and prolongs service life.
yWide AC input voltage range (full load: 173~276/ 300~477Vac; 70% load: 132~173/ 228~
300Vac) reduces frequent transfer from normal mode to battery mode to save battery con-
sumption and prolong battery life.
yBattery test in online mode and regular battery test prolong battery life.
yAutomatic input frequency detection enables operation at 50Hz or 60Hz.
yYou can parallel at maximum four UPS units for N+X parallel redundancy, capacity expan-
sion and reliability enhancement.
yIt is convenient to set the parameters (output voltage, charging current, output frequency
and password setting, etc.) on the LCD panel.
yThe operating conditions, such as load, input and output voltage, input and output frequen-
cy, battery voltage, of the device are available on LCD so that management personnel can
see them accurately and clearly.
yIt can set the output voltage on LCD as: 220/ 230/ 240Vac.
yThe CPU can record up to 200 entries of abnormal information of the UPS, which is helpful

yNo-battery start-up: Even if the UPS does not connect with any batteries, the unit can still
start up normally with normal AC.
yREPO port: Under emergency status, use a user-supplied remote control switch to discon-
nect the output immediately to prevent any danger.
yBuilt-in RS232 port allows monitoring and management of the UPS via the UPSentry 2012
software (http://www.deltapowersolutions.com/en/mcis/software-center.php).
yAttaches optional accessories like SNMP and Mini SNMP cards for network communica-
tion.

8
Ultron HPH Integrated Battery Series
yOther optional accessories include Mini Relay I/O, Mini USB, Mini ModBus and Mini TVSS
cards for dry contact, USB communication, ModBus communication and surge protection.
y
case of any abnormal conditions, the UPS will transfer to online mode automatically.
yAutomatically detects and shows whether fans are operating normally.
yThe fans have automatic speed regulation function. With multi-stage control over the fan

prolong the service life of the fans.
y
maximum. Each adjustment level is 0.5A. The charging mode is set according to the actual
charging current so as to keep the batteries at full charging capacity and prolong the bat-


9
Chapter 3 Appearance and Mechanism
Chapter 3 : Appearance and Mechanism
3.1 Appearance and Dimensions
(Figure 3-1: 20/ 30/ 40 kVA UPS
Appearance and Dimensions)
1400
mm
830
mm
490
mm
EPO
NORMAL
BATTERY
BYPASS
FAULT
ON OFF
ESC
3.2 Front View
(Figure 3-2: Front View)
1LCD Display,
Control Panel and LED Indicators
2Front Door’s Screw
2Front Door’s Screw
3Hidden Door Handle

10
Ultron HPH Integrated Battery Series
1LCD Display, Control Panel and LED Indicators
1. LCD display lets you check the status of the UPS.
 
buttons.
3. LED indicators include NORMAL, BATTERY, BYPASS and FAULT these four indica-
tors.
4. Please see Chapter 8. LCD Display & Settings for more information.
23Front Door’s Screws & Hidden Door Handle
To open the UPS’s front door, please remove the two screws shown in Figure 3-2. A hid-
den door handle is at the lateral side.
3.3 Front View with Door Open
(Figure 3-3: Front View with Door Open)
(20kVA Model) (30/ 40kVA Model)
T 50A H,400V DC
FUSE
+ N
FUSE
T 50A H,400V DC
N
+ -
1
2
1Internal Battery Fuse Holders
Only service personnel can install battery fuses (provided) in the fuse holders. Do not

battery fuse holders.

11
Chapter 3 Appearance and Mechanism
(Figure 3-4: Open/ Close the Internal Battery Fuse Holders)
Open the Internal
Battery Fuse Holders
Close the Internal
Battery Fuse Holders
2Internal Battery Cabinet
Different models of UPSs have different contents inside the internal battery cabinet.
There are two types and please see the table below for more information.
Type 1 (For part No.: GES203HH33A035 & GES303HH33A035 & GES403HH33A035)
1. The internal battery cabinet includes:
No. Item Quantity
1Internal Batteries 80 PCS
2Battery Tray 20 PCS
3Battery Cable (Long & Black) 20 PCS
4Battery Cable (Short & Black) 60 PCS
5Battery Cable (Red) 20 PCS
2. The internal batteries, battery trays and battery cables shown in the table above have
-
form battery installation, wiring and connection.
Type 2 (For part No.: GES203HH33B035 & GES303HH33B035 & GES403HH33B035)
The internal battery cabinet does not include any batteries. Please install our suggested
type of batteries. For battery type, please contact your local dealer or service personnel.
Please note that you need to additionally purchase a battery kit (not provided; please re-
fer to Chapter 9: Optional Accessories) for battery installation. Only service personnel
can perform battery installation, wiring and connection.

12
Ultron HPH Integrated Battery Series
3.4 Control Panel
EPO
NORMAL
BATTERY
BYPASS
FAULT
ON OFF
ESC
7
1256
3 8
4
12 9
10
11
(Figure 3-5: Front Panel)
No. Item Description
1
NORMAL
This indicates that the UPS is operating in online mode and
the utility AC power is normal.
2
BATTERY
This indicates that the UPS is operating in battery mode and
the external batteries are discharging.
3
BYPASS
This indicates that the UPS is operating in bypass mode.
4
FAULT
This indicates that the UPS has abnormalities.
5LCD Display This displays the operating status of the UPS and the rel-
evant monitoring data.
6ON ON key: Press this key for 3~4 seconds and release it after
you hear a beep to start up the UPS.
7OFF OFF key: Press this key once and the LCD shows the fol-
lowing screen. To turn off the UPS, please press the DOWN
key ( ).
?
6+87'2:1
<(6 12
8

13
Chapter 3 Appearance and Mechanism
No. Item Description
9Moves up/ Increases number.
10
Moves down/ Decreases number.
11
ESC Goes back to previous screen or cancels current selection.
12
EPO When an emergency event occurs, press the EPO key for

of the UPS immediately.
3.5 Rear Panel
(Figure 3-6: 20kVA Model Rear Panel)
12
ON
P1 P2 P3 P4 P5 P6 P1 P2
SMARTSLOT MINISLOT
PARALLELPARALLEL
SWITCH
PARALLEL
REPO CHARGER
DETECTION
INPUT
DRYCONTACT
OUTPUT
DRYCONTACT
MANUALBYPASS SWITCH
RS-232
WARNING:
OPENINGTHIS COVER PLATE WILL
CAUSE INVERTERSHUTDOWN.ONLY
AUTHORIZED SERVICEPERSONNEL
CAN OPENAND OPERATE IT.
BYPASS BREAK ER
INPUT BREAKER
UPS OUTPUT
N
T
S
R
-
N
240V DC 240V DC AC INPUT
N
T
S
R
+
BATTERY INPU T
RST NRS T N
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
(Figure 3-7: 30kVA Model Rear Panel)
WARNING:
OPENINGTHIS COVER PLATE WILL
CAUSE INVERTERSHUTDOWN.ONLY
AUTHORIZED SERVICEPERSONNEL
CAN OPENAND OPERATE IT.
12
ON
WARNING:
OPENINGTHIS COVER PLATE WILL
CAUSE INVERTERSHUTDOWN.ONLY
AUTHORIZED SERVICEPERSONNEL
CAN OPENAND OPERATE IT.
MANUALBYPASS SWITCH
P1 P2 P3 P4 P5 P6 P1 P2
SMARTSLOT MINISLOT
PARALLELPARALLEL
SWITCH
PARALLEL
REPO CHARGER
DETECTION
INPUT
DRYCONTACT
OUTPUT
DRYCONTACT
RS-232
240V DC 240V D C
+
N
-
R
AC INPUT
STN
UPS OUTPUT
RST N
BATTERY INPUT
BYPASS BREAK ERINPUT BREAKER
RST NRS T N
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
12
13
14
15
16
17
18
19
20
21
1
3
4
5
6
7
8
9
10
11
2

14
Ultron HPH Integrated Battery Series
(Figure 3-8: 40kVA Model Rear Panel)
WARNING:
OPENINGTHIS COVER PLATE WILL
CAUSE INVERTERSHUTDOWN.ONLY
AUTHORIZED SERVICEPERSONNEL
CAN OPENAND OPERATE IT.
12
ON
WARNING:
OPENINGTHIS COVER PLATE WILL
CAUSE INVERTERSHUTDOWN.ONLY
AUTHORIZED SERVICEPERSONNEL
CAN OPENAND OPERATE IT.
MANUALBYPASS SWITCH
P1 P2 P3 P4 P5 P6 P1 P2
SMARTSLOT MINISLOT
PARALLELPARALLEL
SWITCH
PARALLEL
REPO CHARGER
DETECTION
INPUT
DRYCONTACT
OUTPUT
DRYCONTACT
RS-232
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
240V DC 240V D C
+
N
-
R
AC INPUT
STN
UPS OUTPUT
RST N
INPUTBREAKER
R S T N
BYPASS BREAKER
R S T
N
BATTERY INPUT
1
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
2
No. Item Description
1SMART Slot Connects SNMP/ Relay I/O/ ModBus card. For detailed informa-
tion, please refer to Chapter 5 : Communication Interfaces.
2MINI Slot Connects Mini SNMP/ Mini Relay I/O/ Mini USB/ Mini ModBus/
Mini TVSS card. For detailed information, please refer to Chapter
5 : Communication Interfaces.
3DC Fans Cool and ventilate the UPS.
4Parallel Switch Controls parallel ports' status (ON or OFF). For detailed informa-
tion, please refer to Chapter 5 : Communication Interfaces.
5Parallel Ports For UPS parallel usage. For detailed information, please refer to
Chapter 5 : Communication Interfaces.
6Output Dry
Contacts
Receive the UPS’s event information. Please refer to Chapter 5 :
Communication Interfaces.
7Input Dry
Contacts
Receive external information of devices connected to the input dry
contacts. Please refer to Chapter 5 : Communication Interfaces.

15
Chapter 3 Appearance and Mechanism
No. Item Description
8REPO Port When an emergency event occurs, it can disconnect the UPS
power supply rapidly and shut down the UPS safely and immedi-
ately. For detailed information, please refer to Chapter 5 : Com-
munication Interfaces.
9Manual Bypass
Switch
For maintenance only! Only authorized service personnel can
open the cover plate of the manual bypass switch and operate it.
Please note that opening this cover plate will cause inverter shut-
down.
10
RS232 Port Connects to a computer. For detailed information, please refer to
Chapter 5 : Communication Interfaces.
11
Charger
Detection Port
Connects to a charger box and detects the charger status.
Please refer to Chapter 5 : Communication Interfaces.
12
Input Breaker Controls the UPS’s main input switch and for safety protection.
13
Bypass
Breaker
Controls the UPS’s bypass power switch and for safety protection.
14
For external battery cabinet grounding.
15
Battery Input
Terminal Block
Connects an external battery cabinet. Only batteries with the same
type and rating can be paralleled.
16
AC Input
Terminal Block
Connects the main AC source.
17
For UPS grounding.
18
UPS Output
Terminal Block
Connects the critical loads.
19
For critical load grounding.
20
Casters The casters are designed for a short distance movement only. Do
not use the casters to move the UPS over a long distance. The
casters are not designed to provide long-term support for the UPS
after installation.
21
Levelers The levelers are designed to provide long-term support for the
UPS.

16
Ultron HPH Integrated Battery Series
Chapter 4 : Operation Modes
yOnline Mode
The critical load is supplied by the inverter, which derives its power from the utility AC power, and
the UPS charges the batteries as needed and provides power protection to the equipment. During
on-line mode, the NORMAL LED indicator (
NORMAL
) illuminates (green).
BYPA.
MAIN
LOAD
Batteries
Rectifier Inverter
(Figure 4-1: Path of Electrical Power through the UPS in Online Mode)
yStandby Mode
When the input voltage and frequency of the utility AC power are within the normal range, the UPS
runs in standby mode and charges the batteries. The bypass and the inverter have no output.
(Figure 4-2: Path of Electrical Power through the UPS in Standby Mode)
BYPA.
MAIN
LOAD
Batteries
Rectifier Inverter