INVT HT33 Series User manual

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HT33 Series User Manual
Safety Precautions
This manual is about the installation and operation of HT33 Series UPS (Hereinafter referred to as
UPS).
Please carefully read this manual prior to installation.
The UPS must be debugged and maintained by the engineer commissioned by the manufacturer or
the agent. Otherwise, human safety may be endangered and the damage of UPS shall not belong to the
warranty scope.
UPS is only used for commercial / industrial purpose and cannot be used as power of life support
equipment.
APPLICABLE STANDARDS
This product complies with CE 73/23 & 93/68 (low voltage safety) and 89/336 (EMC) , and EMC
standards of Australia and New Zealand (C-Tick) , and the following UPS product standards:
*IEC62040-1-1-General and safety requirements for use in operator access area
*IEC/EN62040-2 EMC requirements CLASS C3
*IEC62040-3 Performance requirements and test methods
Continued compliance requires installation in accordance with these instructions and the use of
manufacturer approved accessories only.
WARNING- High earth leakage current
Earth connection is critical before connecting the input supply (include both utility supply and
battery) . This equipment must be earthed in accordance with local electrical authority codes of
practice.
Earth leakage current exceeds 3.5 mA and is less than 1000 mA.
Transient and steady-state earth leakage currents, which may occur when starting the equipment,
should be taken into account when selecting instantaneous RCCB or RCD devices.
Residual Current Circuit Breakers ( RCCBs) must be selected insensitive to DC unidirectional pulses
( class A ) and transient current pulses ( RCCBs) .
Note it that the earth leakage currents of the load will also flow across RCCB or RCD.
Components that can be maintained by user
All the equipment maintenance and servicing procedures involving internal access need special tools
and should be carried out only by trained personnel. The components that can only be accessed by
opening the protective cover with tools cannot be maintained by user.
This UPS full complies with “IEC62040-1-1-General and safety requirements for use in operator
access area UPS”.Dangerous voltages are present within the battery box. However, the risk of
contact with these high voltages is minimized for non-service personnel. Since the component with
dangerous voltage can only be touched by opening the protective cover with a tool, the possibility of
touching high voltage component is minimized. No risk exists to any personnel when operating the
equipment in the normal manner, following the recommended operating procedures in this manual.

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HT33 Series User Manual
Battery Voltage Higher Than 400Vdc
All the battery maintenance and servicing procedures involving internal access need special tools or
keys and should be carried out only by trained personnel.
SPECIAL CARE SHOULD BE TAKEN WHEN WORKING WITH THE BATTERIES ASSOCIATED
WITH THIS EQUIPMENT. WHEN CONNECTED TOGETHER, THE BATTERY TERMINAL
VOLTAGE WILL EXCEED 400Vdc AND IS POTENTIALLY LEATHAL.
Battery manufacturers supply details of the necessary precautions to be observed when working on,
or in the vicinity of, a large bank of battery cells. These precautions should be followed implicitly at all
times. Particular attention should be paid to the recommendations concerning local environmental
conditions and the provision of protective clothing, first aid and fire-fighting facilities.

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CONTENTS
Chapter 1 Quick Start..................................................................................... 6
1.1 Introduction...........................................................................................................................................6
1.2 Initial Checking.....................................................................................................................................6
1.3 Environment Checking.........................................................................................................................6
1.4 Installation Checking............................................................................................................................6
Chapter 2 Installation Guidance..................................................................... 7
2.1 Introduction...........................................................................................................................................7
2.2.2 Battery Room........................................................................................................................ 8
2.2.3 Storing................................................................................................................................... 8
2.3 Disassembly, Initial Checking and Positioning .....................................................................................8
2.3.1 System Packing .................................................................................................................... 8
2.3.2 UPS Composition.................................................................................................................. 9
2.3.3 Operation Space................................................................................................................... 9
2.3.4 Front and Back Access ......................................................................................................... 9
2.3.5 Final Positioning.................................................................................................................... 9
2.3.6 Cable Entry ......................................................................................................................... 10
2.4 Protective Devices..............................................................................................................................10
2.4.1 Rectifier and Bypass Input Supply of the UPS.................................................................... 10
2.4.2 Battery................................................................................................................................. 10
2.4.3 UPS Output......................................................................................................................... 11
2.5 Power Cables.....................................................................................................................................11
2.5.1 Maximum stable state current and configuration of cable system....................................... 11
2.5.2 Cable Connection................................................................................................................ 12
2.5.3 Connection for Battery (Only Applicable for the UPS with Build-in Battery) ........................ 12
2.6 Control and Communication Cabling..................................................................................................13
2.6.1 Dry Contact Interface of Battery and Environmental Temperature Detection (Optional)..... 14
2.6.2 Remote EPO Input Port (Optional)...................................................................................... 14
2.6.3 Generator Input Dry Contact (Optional) .............................................................................. 15
2.6.4 BCB Interface (Optional)..................................................................................................... 16
2.6.5 Battery Warning Output Dry Contact Interface (Optional)................................................... 16
2.6.6 Integrated Warning Output Dry Contact Interface (Optional)............................................... 17
2.6.7 Mains Failure Warning Output Dry Contact Interface (Optional)......................................... 17
2.6.8 RS232 Port and SNMP Card Port....................................................................................... 18
2.7 Installation Diagram.........................................................................................................................19
Chapter 3 Operations................................................................................... 21
3.1 Introduction.........................................................................................................................................21
3.1.1 Principle .............................................................................................................................. 21
3.1.2 Bypass Module.................................................................................................................... 22
3.1.3 Battery Temperature Compensation................................................................................... 22
3.2 Operation Mode..................................................................................................................................22
3.2.1 Normal Mode....................................................................................................................... 23
3.2.2 Battery Mode....................................................................................................................... 23
3.2.3 Auto-Restart Mode.............................................................................................................. 23
3.2.4 Bypass Mode ...................................................................................................................... 23

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HT33 Series User Manual
3.2.5 Maintenance Mode.............................................................................................................. 23
3.2.6 ECO Mode .......................................................................................................................... 23
3.2.7 Frequency Converters Mode............................................................................................... 24
3.2.8 Parallel connection redundancy mode................................................................................ 24
3.3 Battery Management..........................................................................................................................24
3.3.1 Normal Function.................................................................................................................. 24
3.3.2 Advanced Functions (Battery Self-checking and Maintenance).......................................... 24
3.4 Battery Protection...............................................................................................................................25
Chapter 4 Installation of Parallel Operation System..................................... 26
Chapter 5 Operating Procedures ................................................................. 28
5.1 Power Switches..................................................................................................................................28
5.2 UPS Start-up......................................................................................................................................28
5.2.1 Normal Mode Start.............................................................................................................. 28
5.2.2 Battery Module Start （Only Applicable for the UPS with Battery Cold Start Elements）.. 30
5.3 Procedure for Switching between Operation Modes ..........................................................................30
5.3.1 Procedure for Switching the UPS into Battery from Normal Mode...................................... 30
5.3.2 Procedure for Switching the UPS into Bypass from Normal Mode...................................... 30
5.3.3 Procedure for Switching the UPS into Normal from Bypass Mode...................................... 31
5.3.4 Procedure for Switching the UPS into a Maintenance Bypass from Normal Mode............. 31
5.3.5 Procedure for Switching the UPS into Normal from a Maintenance Bypass Mode............. 31
5.4 Procedure for Completely Powering down a UPS..............................................................................31
5.5 EPO Procedure..................................................................................................................................32
5.6 Language Selection............................................................................................................................32
5.7 Control Password...............................................................................................................................32
Chapter 6 Operator Control and Display Panel............................................ 33
6.1 Introduction.........................................................................................................................................33
6.1.1 LED Indicator ...................................................................................................................... 34
6.1.2 Audible Alarm (buzzer)........................................................................................................ 34
6.1.3 Functional Keys................................................................................................................... 34
6.2 LCD Display Type ..............................................................................................................................35
6.2.1 Default Display.................................................................................................................... 35
6.2.2 Data Display........................................................................................................................ 35
6.2.3 Setting Display.................................................................................................................... 36
6.2.4 Function Display.................................................................................................................. 36
6.2.5 State Display....................................................................................................................... 36
6.2.6 Confirm Display................................................................................................................... 37
6.2.7 History Record Display........................................................................................................ 37
6.3 Detailed Description of Menu Items....................................................................................................37
6.4 Alarm List ...........................................................................................................................................38
Chapter 7 Maintenance................................................................................ 40
7.1 Instruction of Maintenance Operation.................................................................................................40
7.1.1 Precautions......................................................................................................................... 40
7.1.2 Instruction to Bypass Module.............................................................................................. 40
Chapter 8 Product Specification................................................................... 41
8.1 Applicable Standards .........................................................................................................................41
8.2 Environmental Characteristics............................................................................................................41

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HT33 Series User Manual
8.3 Mechanical Characteristics.................................................................................................................41
8.4 Electrical Characteristics (Input Rectifier)...........................................................................................42
8.5 Electrical Characteristics (Intermediate DC Link)...............................................................................42
8.6 Electrical Characteristics (Inverter Output).........................................................................................42
8.7 Electrical Characteristics(Bypass Mains Input)...................................................................................43
8.8 Efficiency............................................................................................................................................44

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HT33 Series User Manual
Chapter 1 Quick Start
1.1 Introduction
This chapter introduces the basic principles for UPS installation and debugging, so that customers
can install and debug UPS quickly.
1.2 Initial Checking
Perform the following checking operations prior to the UPS installation.
1. Visually examine if there is any damp, water, or damage inside and outside the UPS packing,
products and battery equipments due to the transportation. Report any such damage to the shipper
immediately.
2. Verify the product label and confirm the correctness of the equipment. The equipment label is
attached on the back of front door. The UPS model, capacity and main parameters are marked on
the label.
3. Verify correctness of the accessories. If there is any mistake for accessories, contact with shipper
or provider.
1.3 Environment Checking
Before installing UPS, please check these items as below:
1. Is the UPS operation environment temperature above 25℃?If so, please add cooling equipments.
Note: Environment temperature above 20℃,battery life will reduce to half when environment
rise each 10℃.
2. Is the UPS operation environment temperature below 0℃? If so, please add heaters.
3. Is the UPS operation environment humidity is above 90%? Is there any condensing? If so, please
add additional protection.
4. In the UPS operation environment, is there any sunshine shining in directly or life-form coming in? If
so, please add additional protection.
5. In the UPS operation environment, is there any dust, combustible or explosive gas? If so, please
add additional protection.
1.4 Installation Checking
After finishing installation, please check these items as below:
1. Is UPS installed on the flame-retardant materials?
2. Are all cables connected exactly?
3. Are all grounded system connected according to the manual?
4. Is there enough operation space around UPS?
5. Please confirm all UPS external terminals are fastened, the moment should meet requirements.
6. Please confirm that there are no screws, cables and other conductor left in the UPS. If there is,
please take out.

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HT33 Series User Manual
Chapter 2 Installation Guidance
2.1 Introduction
This chapter introduces UPS installation, it provide normal installation steps and ideas. Please
installation engineers operate according to difference for each place,
Warning-Installation can only be done by authorized engineers
1. Do not apply electrical power to the UPS equipment before the approval of commissioning
engineer.
2. The UPS should be installed by a qualified engineer in accordance with the information contained
in this chapter.
Note: 3-Phase 4-Wire Input Power is required
The standard UPS can be connected to TN, TT and IT AC distribution system (IEC60364-3) of
3-phase 5-wire
WARNING: battery hazards
SPECIAL CARE SHOULD BE TAKEN WHEN WORKING WITH THE BATTERIES ASSOCIATED
WITH THIS EQUIPMENT. When connecting the battery, the battery terminal voltage will exceed
400Vdc and is potentially lethal.
Eye protection should be worn to prevent injury from accidental electrical arcs.
Remove rings, watches and all metal objects.
Only use tools with insulated handles.
Wear rubber gloves.
If a battery leaks electrolyte, or is otherwise physically damaged, it must be replaced, stored in a
container resistant to sulfuric acid and disposed of in accordance with local regulations.
If electrolyte comes into contact with the skin, the affected area should be washed immediately
with water.
2.2.1 Distribution Room
The UPS is designed for indoor installation, which shall be located in a clean environment with
adequate ventilation to keep the environmental temperature within the required specification. The UPS
uses forced convection cooling by internal fans. Cooling air enters the module through ventilation grills
located at the front part of the cabinet and exhausted through grills located in the rear part of the cabinet.
Please do not block the ventilation holes.
If necessary, a system of extractor fans should be installed to aid cooling-air flow. An air filter should
be used when the UPS is to operate in a dirty environment and should be regularly cleaned to maintain
airflow.
Note: The UPS should be installed on a cement surface or other surface that is not
combustible.

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HT33 Series User Manual
2.2.2 Battery Room
The battery will generate some amount of hydrogen and oxygen at the end of charging, so the
fresh air volume of the battery installation environment must meet EN50272-2001 requirements. The
ambient temperature of the battery must be stable. Ambient temperature is a major factor in determining
the battery capacity and life. The nominal operating temperature of battery is 20°C. Operating above this
temperature will reduce the battery life, and operation below this temperature will reduce the battery
capacity. If the average operating temperature of battery is increased from 20ºC to 30ºC, then the
service life of the battery will be reduced by 50%. If the operating temperature of the battery is above
40ºC, then the battery service life will be decreased in exponent rate. In a normal installation, the battery
temperature is maintained between 15°C and 25°C. Keep batteries away from heat sources or air
outlets.
If external batteries are to be used, a battery protection device (a DC circuit breaker) must be
mounted as close as possible to the batteries, and the connecting cables should be as short as possible.
2.2.3 Storing
If the equipment not be installed immediately, it must be stored in a room so as to protect it against
excessive humidity and heat sources. The battery needs to be stored in dry and cool place with good
ventilation. The most suitable storage temperature is 20 ºC to 25ºC.
2.3 Disassembly, Initial Checking and Positioning
Check the packaging first upon the arrival of product to see if there is any damage; open the
packaging to check the equipment; report any such damage to the shipper immediately.
2.3.1 System Packing
Open the wooden case first, then take out the foam. Be careful not to scratch the product.
Fig 2-1 UPS Packing Diagram
Tip: Dismantle the bolts that connect the cabinet and wooden pallet after disassembly, then
lift the cabinet to installation position. The dismantlement should be careful so as not to scratch
the body.
Verify the product label and confirm the correctness of the equipment. The equipment label is
attached on the back of front door. The UPS model, capacity and main parameters are marked on the
label.

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HT33 Series User Manual
Warm Tips: Please dispose the wasted materials in accordance with environmental
protection requirements after disassembly.
To prolong the service life, the place chosen for the UPS must guarantee:
Easy wiring
Sufficient space for operation
Air sufficient enough to dispel heat produced by UPS
Against ambient corrosive gases
Against excessive humidity and heat sources
Against dust
With the current fire prevention requirements
The operating environment temperature is within 20℃-25℃. The batteries are at maximum
efficiency in this temperature range (for information about the battery storage and transportation as
well as the environment, please refer to table 8-2)
2.3.2 UPS Composition
UPS composition shall refer to fig 2-2.
a. 10KVA~30KVA cabinet without built-in battery b.10KVA~30KVAcabinet with built-in battery
Fig 2-2 UPS Composition Diagram
2.3.3 Operation Space
As UPS has no ventilation grills at either side, no clearances are required for the sides.
To enable routine tightening of power terminations within the cabinet, it is recommended that
clearance around the front and back of the equipment should be sufficient to enable free passage of
personnel with the doors fully opened. The back door of the cabinet is more than 800mm from the wall or
other cabinets.
2.3.4 Front and Back Access
The component layout of the UPS supports front and back access for servicing, diagnosing and
repairing the UPS, thus reducing the space requirement for side access.
2.3.5 Final Positioning
When the equipment has been finally positioned, ensure the adjustable feet are set so that the UPS
will remain stationary and stable.

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HT33 Series User Manual
2.3.6 Cable Entry
A lower incoming line is used for 10KVA~30KVA UPS.
2.4 Protective Devices
For safety concerns, it is recommended to install external circuit breakers or other protective devices
for the input AC supply of the UPS system. This section provides generic practical information for
qualified installation engineers. The installation engineers should have the knowledge of the regulatory
wiring standards, and of the equipment to be installed.
2.4.1 Rectifier and Bypass Input Supply of the UPS
Install suitable protective devices in the distribution unit of the incoming mains supply, considering
the power cable current-carrying capacity and overload capacity of the system. Generally, the magnetic
circuit breaker with IEC60947-2 tripping curve C (normal) at the 125% of the current listed in table 2-1 is
recommended.
Note
For IT power network system, 4-pole protective device must be installed on the external input distribution of the
UPS.
Earth leakage current
If protection against earth faults (RCD devices) is required for the upstream of the input supply, the
installed device should:
Sensitive to DC unidirectional pulses (class A) in the network
Insensitive to transient current pulses
Have an average sensitivity that is adjustable between 0.3A-1A
The RCCB must be sensitive to DC unidirectional pulses (class A) in the network, while insensitive
to transient current pulses, as shown in fig 2-3 respectively.
Fig 2-3 RCCB sign
2.4.2 Battery
A battery unit is composed of 40 batteries connected in series, a centreline is drawn from in between
(the joint part between the 20th and 21st battery), plus the line drawn from the front and back, there are
altogether 3 lines connected with UPS line contact bank. The battery line must push through a DC circuit
breaker before connecting to corresponding UPS line contact bank. The detailed wiring please refers to
fig 2-4 below:

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HT33 Series User Manual
Fig 2-4 Diagram of batteries connected in series
2.4.3 UPS Output
A main output switch has been installed in UPS; the user shall install the overcurrent protective
device on the bypass of each output of the external distribution cabinet.
2.5 Power Cables
Design the cables according to the descriptions in this section and local regulatory wiring standards,
and the environmental conditions should be taken into consideration. Refer to IEC60950-1 table 3B.
Warning
Prior to cabling the UPS, confirm the status and positions of the switches of the UPS rectifier input
power supply / bypass power supply and mains power distribution board.
Ensure that these switches are opened and attached with WARNING label so as to prevent
unauthorized operation to these switches.
2.5.1 Maximum stable state current and configuration of cable system
Table 2-1 Maximum stable state current and configuration of cable system
System Name HT 33010 HT 33015 HT 33020 HT 33030
Capacity System capacity 10KVA 15KVA 20KVA 30KVA
Cabinet
dimension mm
W*D*H
540*690*1100 (with built-in battery)
280*730*668 (without built-in battery) 320* 781* 788
Main Input Rated current A 15 22.5 30 45
Cable mm2 4 6 10 10
Output Rated current A 15 22.5 30 45
Cable mm2 4 6 10 10
Battery Rated current A 18 26.5 36 53
Cable mm2 6 10 10 16
PE Cable mm2 10 10 16 25
Forty batteries in series connection in total

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HT33 Series User Manual
Warning
FAILURE TO FOLLOW ADEQUATE EARTHING PROCEDURES CAN RESULT IN EMI, ELECTRIC
SHOCK HAZARD OR RISK OF FIRE, SHOULD AN EARTH FAULT OCCUR.。
2.5.2 Cable Connection
Important
The operations described in this section must be performed by authorized electricians or qualified
technical personnel.. If you have any difficulties, do not hesitate to contact our Customer Service &
Support department .
After the equipment has been finally positioned and secured, connect the power cables as
described in the following procedures:
1. Verify that all the external input distribution switches of the UPS are completely opened and the
UPS internal maintenance bypass switch is opened. Attach necessary warning signs to these
switches to prevent unauthorized operation.
2. Open the back door of the cabinet, remove the cover and then the input and output terminal,
battery terminal and earth terminal are visible.
3. Connect the input earth wire to input earth terminal. Please note: the earth wire shall be connected
in accordance with related local or state regulation
4. If in UPS, same electric supply input is used for the by-pass and rectification, AC input cables
should be connected with the input terminal of UPS (Main input A-B-C-N) and the output load
cables are connected with the output terminal of UPS (Output A-B-C-N). If in UPS, two
electric supply inputs are respectively used for the by-pass and rectification, the AC input cables
should be respectively connected with the main input terminal of UPS (Main input A-B-C-N) and
the input terminal of the bypass, and at the same time the short circuit copper bars of the
main circuit and the bypass are removed; fastening moment of force is 30kg(M5), 50kg(M6),
180kg(M8) and 260kg(M10). Attention is given to phase sequence and the short circuit at a joint
between cable terminals.
5. Connect the battery cables between the UPS battery terminals and battery switch. ENSURE
CORRECT PHASE ROTATION.
Warning-Hazardous battery terminal voltage of 400Vdc
Ensure the correct polarity connection between the battery terminals and the UPS terminals: Positive
terminal to positive terminal, negative terminal to negative terminal, and disconnect one or more than
one cable between every two layers of batteries.Do not connect the cables and close the battery
circuit breakers before getting the approval from the commissioning engineer.
6. Re-install all the protective covers.
2.5.3 Connection for Battery (Only Applicable for the UPS with Build-in Battery)
For the type below 30KVA with build-in battery of HT33 series UPS, there is an internal battery
breaker in the UPS. Also, this type UPS offer external battery connection terminals. If customers want to
use external battery, they should fix a battery breaker between the UPS and external battery.
Customers can choose the type below 30KVA with build-in battery (40*12AH) of HT33 series UPS,
they also can install the battery and connect battery cables by themselves, The franchiser will provide
battery cables as optional components for customers selecting. The method of build-in battery
connection as shown fig. 2-5:

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HT33 Series User Manual
Fig 2-5a Build-in battery connection diagram
The UPS and battery are connected by Anderson terminals as shown below, according to the mark
of cables, connect cables W404,W405,W406 to K(+),K(N),K(-).
Fig 2-5b Build-in battery connection diagram
2.6 Control and Communication Cabling
As shown fig. 2-6, the dry contact interface (J2-J10), communication interface (RS232 interface, 485
interface and SNMP card interface) and LBS interface.

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HT33 Series User Manual
Fig 2-6 Dry contact interface and communication interface
The UPS accepts external signal from zero-voltage (dry) contacts connected through external dry
contact terminals produced and phoenix terminals that are in bypass module. Through software
programming, these signals become active when these contacts connect to +24V to ground.The cables
connected to DRY terminal must be separated from power cables. Moreover, these cables should be
double insulated with a typical 0.5 to 1.5 mm2
2.6.1 Dry Contact Interface of Battery and Environmental Temperature Detection
(Optional)
cross-section area for a maximum connection length
between 25 and 50 meters.
The input dry contact J2 and J3 can detect the temperature of batteries and environment
respectively, which can be used in environment monitoring and battery temperature compensation 1.
J2 and J3 interfaces diagram are shown in fig 2-7, the description of interface is in table 2-2.
J2 J3
T
E
M
P
_
B
A
T
T
E
M
P
_
E
N
V
Fig 2-7 Diagram of J2 and J3 dry contact for temperature detecting
Table 2-2 Description of input dry contact interface J2 and J3
Position
Name
Purpose
J2.1
TEMP_BAT
Battery temperature detection
J2.2
GND
Power ground
J3.1
TEMP_ENV
Environment temperature detection
J3.2
GND
Power ground
Note:
Specified temperature sensor is required for temperature detection (R25=5Ohm, B25/50=3275),
please confirm with the manufacturer, or contact local maintenance engineers when placing an order.
2.6.2 Remote EPO Input Port (Optional)
The UPS has an Emergency Power OFF (EPO) function. This function can be activated by pressing
a button on the control panel of the UPS or through a remote contact provided by the user. The EPO
pushbutton is protected by a hinged plastic cover.

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HT33 Series User Manual
J4 is the input port for remote EPO. It requires shorting NC and +24v during normal operation, and
the EPO is triggered when opening NC and +24v, or shorting NO and +24v. The port diagram is shown in
Fig 2-8, and port description is shown in table 2-3.
J4
E
P
O
_
N
C
+
2
4
V
E
P
O
_
N
O
+24V
Fig 2-8 Diagram of input port for remote EPO
Table 2-3 Description of input port for remote EPO
Position
Name
Purpose
J4.1
EPO_NC
EPO is activated when disconnecting fromJ4.2
J4.2
＋
24V
+24V, connect the common terminal of NC and NO
J4.3
EPO_NO
EPO is activated when shorting with J4.2
The EPO is triggered when shorting pin 2 and 3 or opening pin 2 and 1 of J4.
If an external emergency stop facility is required, it is connected via the reserved terminals of
J10.The external emergency stop facility needs to use shielded cables to connect to the `normally
open/closed remote stop switch between these two pins. If this facility is not used, then pin 3 and pin 4 of
J4 must be open, or pin 1 and pin 2 of J4 must be shorted.
Note
1. The emergency stop action within the UPS will shut down the rectifier, inverter and static bypass.
However, it does not internally disconnect the mains input power supply. To disconnect ALL power to
the UPS, open the upstream input circuit breaker(s) when the EPO is activated.
2. Pin 1 and 2 of J4 have been shorted before the UPS is delivered
2.6.3 Generator Input Dry Contact (Optional)
J5 is status interface for generator connection. Connect pin 2 of J5 with + 24V power supply, and it
indicates that the generator has been connected with the system. The interface diagram is shown in fig
2-9 and interface description is shown in table 2-4

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HT33 Series User Manual
J5
G E N
+24V
AUX-N.O.
AUX-N.O.
发电机
Fig 2-9 Diagram of status interface and connection of generator
Table 2-4 Description of maintenance bypass switch and output switch status interface
Position
Name
Purpose
J5.1
+24V
+24V power supply
J5.2
GEN
Connection status of generator
J5.3
GND
Power ground
2.6.4 BCB Interface (Optional)
J6 and J7 are battery circuit breaker (BCB) interface. The interface diagram is shown in fig 2-10 and
interface description is shown in table 2-5.
B
C
B
_
D
R
V
B
C
B
_
C
O
N
T
J6 J7
B
C
B
_
O
N
L
+24V
+24V
+24V
Fig 2-10 BCB Interface
Table 2-5 Description of BCB Interface
Position
Name
Purpose
J6.1 BCB_DRV BCB drive signal: providing +24V, 20mA drive signal
J6.2 BCB_CONT BCB contact status，connect to BCB’s normal open signal
J7.1 GND Power ground
J7.2 BCB_ONL BCB online input（normal open），
it shows BCB is online when this
signal connects to GND.
2.6.5 Battery Warning Output Dry Contact Interface (Optional)
J8 is the output dry contact interface, which outputs the battery warnings of low or excessive voltage,
when the battery voltage is lower than set value, an auxiliary dry contact signal will be provided via the
isolation of a relay. The interface diagram is shown in fig 2-11, and description is shown in table 2-6.
Generator

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HT33 Series User Manual
J8
B
A
T
_
L
O
W
_
N
C
B
A
T
_
L
O
W
_
N
O
G
N
D
Fig 2-11 Battery warning dry contact interface diagram
Table 2-6 Battery warning dry contact interface description
Position
Name
Purpose
J8.1
BAT_LOW_NC
Battery warning relay (normally closed) will be open during warning
J8.2
BAT_LOW_NO
Battery warning relay (normally open) will be closed during warning
J8.3
GND
Center of battery warning relay
2.6.6 Integrated Warning Output Dry Contact Interface (Optional)
J9 is the integrated warning output dry contact interface, when one or more than one present
warning is triggered, the system will send integrated warning information, and provide an auxiliary dry
contact signal via the isolation of a relay. The interface diagram is shown in fig 2-12, and description is
shown in table 2-7
J9
A
L
A
R
M
_
N
C
A
L
A
R
M
_
N
O
G
N
D
Fig 2-12 Integrated warning dry contact interface diagram
Table 2-7 Integrated warning dry contact interface description
Position
Name
Purpose
J9.1
ALARM_NC
Integrated warning relay (normally closed) will be open during warning
J9.2
ALARM_NO
Integrated warning relay (normally open) will be closed during warning
J9.3
GND
Centre of integrated warning relay
2.6.7 Mains Failure Warning Output Dry Contact Interface (Optional)
J10 is the output dry contact interface for mains failure warning, when the mains fails, the system
will send a mains failure warning information, and provide an auxiliary dry contact signal via the isolation
of a relay. The interface diagram is shown in fig 2-13, and description is shown in table 2-8.

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HT33 Series User Manual
J10
U
T
I
_
F
A
I
L
_
N
C
U
T
I
_
F
A
I
L
_
N
O
G
N
D
Fig 2-13 Mains failure warning dry contact interface diagram
Table 2-8 Mains failure warning dry contact interface description
Position
Name
Purpose
J10.1
UTI_FAIL_NC
Mains failure warning relay(normally closed) will be open during warning
J10.2
UTI_FAIL_NO
Mains failure warning relay( normally open) will be closed during warning
J10.3
GND
Centre of mains failure warning relay
2.6.8 RS232 Port and SNMP Card Port
RS232 and RS485 Port: provide serial data which can be used for commissioning and maintenance
by authorized engineers or maintainers, or can be used for networking or integrated monitoring system in
the service room.
SNMP Card Port: used for field installation of the communication option card (SNMP card).

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HT33 Series User Manual
2.7 Installation Diagram
a. 10KVA~30KVA wiring diagram (with built-in battery)

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HT33 Series User Manual
b. 10KVA~30KVA wiring diagram (without built-in battery)
Fig 2-14 10~30KVA UPS wiring diagram