KEHUA TECH MR33 Series User manual
MR33 Series (300K-800K) Modular UPS
User Manual
All rights reserved ©Kehua Hengsheng Co., Ltd.
i
Copyright © Kehua Hengsheng Co., Ltd. 2020.All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Kehua Hengsheng Co., Ltd.
Trademarks and Permissions
and other Kehua trademarks are trademarks of Kehua Hengsheng Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice
The purchased products, services and features are stipulated by the contract made between Kehua and the
customer. All or part of the products, services and features described in this document may not be within the
purchase scope or the usage scope. Unless otherwise specification in the contract, all statements, information,
and recommendations in this document are provided “AS IS”without warranties, guarantees or
representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
KEHUA HENGSHENG CO.,LTD.
Address:
No.457,MalongRoad,TorchHigh-TechIndustrialZone,Xiamen,Fujian,China
Manufacturer:
ZHANGZHOU KEHUA TECHNOLOGYCO.,LTD.
Postal Code:
361000(XIAMEN), 363000(ZHANGZHOU)
Website:
www.kehua.com
E-mail:
The Customer Service
Telephone:
400-808-9986
Tel:
0592-5160516
Fax:
0592-5162166
Foreword
MR33 Series (300K-800K) Modular UPS
User Manual
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All rights reserved ©Kehua Hengsheng Co., Ltd.
Foreword
Summaries
Thank you for choosing the modular MR series modular UPS!
This document gives a description of the MR series modular UPS, including the features,
performance, appearance, structure, working principles, installation, operation and maintenance etc.
Please save the manual after reading, in order to consult in the future.
The figures in this manual are just for reference, for details please see the actual product.
Suitable Model
⚫MR33300（Top wiring）
⚫MR33400、MR33500
⚫MR33600、MR33800
Symbol Conventions
The manual quotes the safety symbols, these symbols used to prompt users to comply with safety
matters during installation, operation and maintenance. Safety symbol meaning as follows.
Symbol
Description
Alerts you to a high risk hazard that could, if not avoided, result in
serious injury or death.
Alerts you to a medium or low risk hazard that could, if not
avoided, result in moderate or minor injury.
Alerts you to a potentially hazardous situation that could, if not
avoided, result in equipment damage, data loss, performance
deterioration, or unanticipated results.
MR33 Series (300K-800K) Modular UPS
User Manual
Foreword
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Symbol
Description
Anti-static prompting.
Be care electric shock prompting.
Provides a tip that may help you solve a problem or save time.
Provides additional information to emphasize or supplement
important points in the main text.
Product standard: Q/ZZKJ 007
Change History
Changes between document issues are cumulative. The latest document issue contains all the changes
made in earlier issues.
Issue 001 (2020-05-30)
First issue.
Contents
MR33 Series (300K-800K) Modular UPS
User Manual
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All rights reserved ©Kehua Hengsheng Co., Ltd.
Contents
1 Safety Description.........................................................................................................................1
1.1 Safety Announcements.....................................................................................................................................1
1.1.1 Safety Instructions ..................................................................................................................................1
1.1.2 Use Announcements for Battery .............................................................................................................4
1.1.3 Anti-Static Protection..............................................................................................................................5
1.1.4 Grounding Requirements ........................................................................................................................5
1.1.5 Safety Warning Label Setting .................................................................................................................5
1.2 Operation and Maintenance Requirements ......................................................................................................5
1.3 Environment Requirements..............................................................................................................................7
2 Overview.........................................................................................................................................8
2.1 Product Intro.....................................................................................................................................................8
2.2 Features ............................................................................................................................................................8
2.3 Work Principle................................................................................................................................................10
2.3.1 Work Principle Diagram .......................................................................................................................10
2.3.2 Work Mode ...........................................................................................................................................10
2.4 Structure .........................................................................................................................................................12
2.4.1 Sturcture Layout....................................................................................................................................15
2.5 Assembly unit illustration...............................................................................................................................17
2.5.1 Power Module/Bypass Module.............................................................................................................17
2.5.2 System Control Box..............................................................................................................................18
2.6 Optional accessories.......................................................................................................................................22
2.6.1 SNMP card and software ......................................................................................................................22
2.6.2 Expansion cards ....................................................................................................................................25
2.6.3 Parallel System Connection ..................................................................................................................27
MR33 Series (300K-800K) Modular UPS
User Manual
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2.6.4 Synchronous BSC .................................................................................................................................27
2.6.5 Battery temperature compensation........................................................................................................27
2.6.6 Lightning protection facilities...............................................................................................................28
2.7 Alarm Function...............................................................................................................................................28
3 Installation....................................................................................................................................39
3.1 Installation Procedure.....................................................................................................................................39
3.2 Installation Preparation ..................................................................................................................................40
3.2.1 Installation Tools...................................................................................................................................40
3.2.2 Installation Environment.......................................................................................................................41
3.2.3 Installation Space..................................................................................................................................42
3.2.4 Input and Output Wire Selection...........................................................................................................42
3.2.5 Surge Protection Device........................................................................................................................44
3.2.6 Reverse Feedback Protection (Optional)...............................................................................................44
3.3 Transportation and Unpacking .......................................................................................................................44
3.3.1 Transportation .......................................................................................................................................44
3.3.2 Unpacking.............................................................................................................................................45
3.4 Mechanical Installation ..................................................................................................................................47
3.5 Install optional accessory ...............................................................................................................................52
3.5.1 SNMP card............................................................................................................................................52
3.5.2 Dry contact expansion card/BMS expansion card ................................................................................52
3.6 System Wiring................................................................................................................................................53
3.6.1 MR33300 (Top wiring) .........................................................................................................................53
3.6.2 MR33400, MR33500, MR33600 ..........................................................................................................57
3.6.3 MR33800 ..............................................................................................................................................61
3.7 Parallel System Connection ...........................................................................................................................65
3.7.1 Parallel system connection of MR33300 ..............................................................................................65
3.7.2 Parallel system connection of MR33400, MR33500, MR33600 ..........................................................65
3.8 System Check and Test...................................................................................................................................66
3.8.1 Check Electrical Connection.................................................................................................................66
3.8.2 UPS Test................................................................................................................................................67
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MR33 Series (300K-800K) Modular UPS
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3.8.3 Connect Load........................................................................................................................................67
4 Touch Screen Operation and Setting ......................................................................................68
4.1 Menu Structure...............................................................................................................................................68
4.2 Main Page ......................................................................................................................................................69
4.3 System Work Status Display ..........................................................................................................................70
4.4 Buzzer Control Function ................................................................................................................................75
4.5 Monitor Function ...........................................................................................................................................75
4.5.1 Bypas Information ................................................................................................................................75
4.5.2 Mains Information ................................................................................................................................76
4.5.3 Battery Information...............................................................................................................................77
4.5.4 Power Module Information...................................................................................................................77
4.5.5 Inverter Information..............................................................................................................................78
4.5.6 Output Information ...............................................................................................................................79
4.6 Information Query..........................................................................................................................................79
4.6.1 Event log...............................................................................................................................................80
4.6.2 User Log ...............................................................................................................................................80
4.6.3 Device Information ...............................................................................................................................81
4.7 ON/OFF .........................................................................................................................................................82
5 Use and Operation ......................................................................................................................84
5.1 Use Announcements.......................................................................................................................................84
5.2 Operation Procedure.......................................................................................................................................84
5.3 UPS Start and Shutdown................................................................................................................................85
5.3.1 Check before Startup.............................................................................................................................85
5.3.2 Startup...................................................................................................................................................85
5.3.3 UPS Shutdown......................................................................................................................................87
5.3.4 Switch to Bypass Mode Manually ........................................................................................................88
5.3.5 Switch to Maintenance Bypass Mode From Normal Output ................................................................88
5.3.6 Switch to Inverter Power Supply from Maintenance Bypass................................................................89
5.3.7 Emergency Power Off (EPO)................................................................................................................90
5.3.8 Emergency Power Off Recovery...........................................................................................................90
MR33 Series (300K-800K) Modular UPS
User Manual
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5.4 Parallel System Startup and Shutdown...........................................................................................................90
5.4.1 Start Parallel System.............................................................................................................................90
5.4.2 Shutdown Parallel System ....................................................................................................................93
5.4.3 Emergency Power Off (EPO)................................................................................................................94
6 Maintenance and Troubleshooting .........................................................................................95
6.1 Maintenance Guide ........................................................................................................................................95
6.1.1 Safety Precautions.................................................................................................................................95
6.1.2 Preventive Maintenance........................................................................................................................95
6.2 Battery Maintenance ......................................................................................................................................96
6.3 Announcementsfor Battery Replacement.......................................................................................................96
6.4 Troubleshooting..............................................................................................................................................97
6.4.1 Common Abnormal Phenomena Diagnosis ..........................................................................................97
6.4.2 Emergency Dispose for System Fault ...................................................................................................99
7 Package, Transportation and Storage....................................................................................100
7.1 Package ........................................................................................................................................................100
7.2 Transportation ..............................................................................................................................................100
7.3 Storage .........................................................................................................................................................100
A Technical Specifications .........................................................................................................101
B Physics Characters....................................................................................................................106
C Acronyms and Abbreviations................................................................................................108
MR33 Series (300K-800K) Modular UPS
User Manual
1 Safety Description
All rights reserved ©Kehua Hengsheng Co., Ltd.
1
1 Safety Description
This chapter introduces the safety announcements. Prior to performing any work on the UPS, please
read the user manual carefully to avoid human injury and device damage by irregular operations.
1.1 Safety Announcements
This section introduces the safety announcements that must be complied with and pay special
attention while installing, using, maintenance and other relative operations.
Before operating, please read the announcements and operation instructions in this section carefully,
which is to avoid accident.
The DANGER, WARNING, CAUTION in the manual are not all the safety announcements that you
must abide by, they are just the supplements for the safety announcements during operating.
Kehua Company does not undertake the responsibility caused by violating common safety operation
requirements or the safety standard of design, manufacture and use.
1.1.1 Safety Instructions
The input and output of the UPS is dangerous high voltage, once operate improperly, it may endanger
human safety. Please read this manual carefully before installing or operating, and pay attention to
the warning labels. Do not dismantle the case of the UPS unless authorized person.
1 Safety Description
MR33 Series (300K-800K) Modular UPS
User Manual
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It is prohibited to touching any terminal or conductor that connected with grid circuit, or, it may
cause deadly danger.
The damaged device or device fault may cause electric shock or firing!
⚫Before operating, please inspect the device and see if there is any damage or exist other danger.
⚫Check if the external devices or circuit connection is safe.
Touching high voltage directly or through damp objects will lead to lethal risk.
During a lightning storm, it is strictly prohibited to perform high voltage and AC operation, as well as
in the tower or the mast. The atmosphere will generate a strong electromagnetic field in a lightning
storm. Therefore, in order to avoid equipment struck by lightning, lightning protection and grounding
system should be prepared in time.
Do not reversely connect the grounding wire and neutral wire, live wire and neutral wire, which will
cause short circuit.
It should be well grounded and the voltage between ground wire and neutral wire should be less than
5V.
MR33 Series (300K-800K) Modular UPS
User Manual
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If the output of the UPS cannot be half-wave rectification load or inductive load, such as
air-condition, hair drier, starter, electric drill, motor, daylight lamp, etc.
Please do not put finger or tool into rotating fans to avoid endanger the human safety or damage the
device.
In case of fire, please use dry power fire extinguisher. If using liquid fire extinguisher, it may cause
electric shock.
No liquid or other objects are allowed to enter the cabinet.
Keep good ventilation! Ensure that the air inlet and outlet and fan unblocked.
The product is class C3 device. If it is used in the environment that includes all commercial, light
industry and industrial establishments other than those directly connected to a low-voltage mains that
supplies building used for residential purpose, it may cause wireless interference. User should take
actions to avoid the interference.
1 Safety Description
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User Manual
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Warning label should be affixed away from UPS location!
When UPS is power off, there still exists dangerous voltage. It should affix warning labels away from
UPS location and the warning labels should include: 1. It supplies power for UPS. 2. Please
disconnect UPS before wiring.
1.1.2 Use Announcements for Battery
Please use specified battery. Non-specified battery will damage the UPS.
The charging voltage of different brand and different model battery is different. Before using, ensure
that the charging voltage of the UPS matches that of battery. If doubted, please consult the
manufacturer for support.
Battery operation must be done according to instructions!
Battery operation must be done according to instructions, especially battery wiring. Irregular
operation will cause battery damage, even human injury.
⚫It is prohibited to short circuit the anode and cathode of the battery. The battery wiring must be
tightened. It is strictly prohibited to touch any two wiring terminals of battery or the bare
terminals of wires simultaneously, or it may cause battery damage or human injury.
⚫Prevent electrolyte leaking from batteries. The metal objects and circuit board will be corroded
by the overflowing electrolyte and it will result in equipment damage and circuit board short
circuit.
⚫Keep the battery away from fire source and all device that easy cause spark to avoid danger or
unnecessary lose.
MR33 Series (300K-800K) Modular UPS
User Manual
1 Safety Description
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1.1.3 Anti-Static Protection
The static generated by human bodies may damage the electrostatic-sensitive components on PCB.
Before touching the sensitive component, please wear anti-static rings and well connect the other end
of the anti-static rings to ground.
1.1.4 Grounding Requirements
High leakage risk! The device must be grounded before electrical connection. The grounding
terminal must be connected to earth.
⚫When installing, connect the grounding wire first; when dismantling, the grounding wire must be
removed at last.
⚫It is prohibited to damage the grounding conductor.
⚫The device must be connected with protection earthing permanently. Before operating, please
check the electric connection and ensure the device has been connected to earth reliably.
1.1.5 Safety Warning Label Setting
To avoid irrelevant person close to or misoperate the UPS, during installation or daily maintenance,
please comply with the related standards.
⚫Set warning labels at the switches of input end and output end to avoid wrongly close and even
cause accident.
⚫Set warning label or safety warning area to avoid irrelevant person entering and cause human
injury or device damage.
⚫After maintenance, ensure that pull out the key of the UPS and save it properly.
1.2 Operation and Maintenance Requirements
There exists high temperature and high voltage inside the UPS. Please comply with the relevant
safety regulations and operation procedures during installation, operation and maintenance to avoid
human injury or device damage. The safety precautions mentioned in the user manual is just as a
1 Safety Description
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All rights reserved ©Kehua Hengsheng Co., Ltd.
supplement to the local safety regulations. Our company does not undertake the responsibility caused
by violating the common safety operation requirements or safety standards for design, manufacture
and use the device.
The related operation and wiring for the UPS should be performed by qualified professionals, and
ensure the electric installation accord with the electricity installation standards.
The installation and maintenance man should be trained and know each safety announcements and
get the right operation method, and then, the installation, operation and maintenance can be done.
Mounting and dismantling power cables is prohibited when power on. Please switch off the power
switches before mounting or dismantling power cables. Before connecting, make sure the cable
connection, cable labels are in accordance with the actual installation.
⚫Only authorized professionals are allowed to open the UPS chassis! The input and output of UPS
are dangerous high voltage. Touching high voltage will lead to lethal risk.
⚫Before maintenance, please disconnect the AC power and battery to isolate the power input. It is
better to measure the input, output and battery terminal bars by a voltmeter to ensure the input
power is disconnected and in a safe condition.
⚫Even if all external power is disconnected, there still exists residual electric charge on the
capacitance inside the UPS, and the output terminal bars may exists high voltage which
endangers human life. It is necessary to set the UPS aside for enough time (≥10 min) to release
all charge before opening the UPS chassis.
⚫The battery cables are not isolated with AC input. There may exist dangerous voltage between
battery terminal and grounding terminal. Pay attention to the insulation when installing and using
the battery.
⚫Do not wear conductive objects, such as watches, bracelets and rings during operating.
MR33 Series (300K-800K) Modular UPS
User Manual
1 Safety Description
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Drilling holes on the cabinet is prohibited! Inappropriate drilling will damage the components inside
the UPS. Metal debris generated by drilling will lead to circuit board short circuit.
Changing the UPS configuration, structure or assembly will affect the performance of the UPS. If user
needs to do like this, please consult the manufacturer in advance.
1.3 Environment Requirements
Do not put the UPS in the environment where has inflammable, explosive gas or smog, do not do any
operation in this environment.
The operation about any electronics device in explosive environment is exceeding danger, while
using or storing the UPS, please strictly according to the environment mentioned in the manual.
The operation environment of UPS should meet the following requirements.
⚫Please meet the technical specification for equipment operation (temperature: 0℃-40℃, relative
humidity: 0%-95%).
⚫Please keep it well ventilated and far away from water sources, heat sources and inflammable and
explosive goods.
⚫The altitude shall not exceed 1000m. If the altitude exceeds 1000m, it shall be reduced according
to GB/T3859.2.
⚫Please avoid using the device in the following environment for long time.
−The place where has direct sunshine or near a heat source.
−The place where has metallic conductive dust.
−The place where has dust, corrosive material, high salty or volatile gas.
2 Overview
MR33 Series (300K-800K) Modular UPS
User Manual
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2 Overview
This chapter mainly introduces the product features, work principle, structure of the UPS, including
panel indicator meaning and signal port illustration.
2.1 Product Intro
MR series UPS is modular online double-conversion UPS. They are made up of cabinet, power
module, bypass module, system control box and distribution unit. The system is designed in module
and user can online add /decrease or replace the power module conveniently and do not worry about
the normal operation of system. The system is high performance sine-wave UPS that special designed
for the network computer room and precision instrument of financial, communication, insurance,
transportation, tax, army, security, energy source, education, government, enterprise, etc.
2.2 Features
Hot swappable
The power module adopts none-principle-subordinate parallel control technique, each power module
is independent and do not need to match each other strictly. They can be put into use or exit online at
will, which achieves the online hot maintenance. The system has high adaptability, availability,
expandability and low cost.
Three-level inversion technology
Adopts three-level inversion technology, which makes the quality of output voltage wave better and
the efficiency of whole UPS higher.
Completely digitalized DSP control
Adopts digitalized DSP to control the inverting, phase synchronization, output current-sharing, logic
of the power unit, which is with high precision, high speed and perfect whole system performance.
MR33 Series (300K-800K) Modular UPS
User Manual
2 Overview
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Energy conservation and high efficiency
Adopts advanced PFC control technology, the input power factor is greater than 0.99, which greatly
improves the use ratio of electric energy and reduces the load of power grid, and save the cost of
power distribution. The size of whole UPS is small, and the weight is light, calorific value is small,
which enhances the use ratio of environment and decrease the investment cost.
Smart fan speed control
The fan speed is adjusted automatically in accordance with the load status, which prolong fan life and
reduce noise.
ECO energy conservation mode design
The UPS is designed with ECO energy conservation mode. When the user power grid is good, if the
UPS operating in this mode, the bypass prior to output, and the efficiency can be 99%.When the
bypass voltage or frequency out of normal range and cannot satisfy the user’s power supply
requirement, it will switch to inverter output, and this guarantee the reliability of power supply and
also, save energy.
Manual maintenance bypass design
It designs manual maintenance bypass channel to ensure the UPS supply power for load while
maintenance, which greatly improve the system operation reliability and maintainability.
Reliable EMC performance
Pass the authority institution and professional test on EMC, including conducting disturbance,
radioactive disturbance, conducting anti-disturbance, radioactive anti-disturbance, power falling,
mass impulse, static discharging, surge, etc. The excellent EMC characteristics can completely filter
each power grid interference, and also, decrease and eliminate the interference of UPS itself
effectively.
7 inch touch screen display
With 7 inch touch screen display, the operation is simple and convenient, which is convenient to daily
manage and maintain the UPS. It can display the running parameters and running status of UPS and
each power unit, and record the history event and alarm information. It can store 10000 pieces of
information at most.
2 Overview
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2.3 Work Principle
2.3.1 Work Principle Diagram
Work principle diagram of the UPS is as shown in Figure2-1.
ACDC DCAC
DC
DC
Maintenance bypass
Bypass input
Mains input
Battery input
Bypass module
Power module 1
ACDC DCAC
DC
DC
Power module N
Output
Figure2-1 Work principle diagram
2.3.2 Work Mode
There are four work modes of the MR series modular UPS: normal mains power supply mode,
battery power supply mode, bypass power supply mode and maintenance bypass power supply mode.
Normal mains power supply mode
When the mains normal, AC power is transformed to DC power by PFC, and supply power for
inverter. While rectifying the AC power into DC power, the rectifier eliminates the abnormal noise
wave, noise and unstable frequency, and make the inverter provide stable and clean power for load.
The specific work process is as follows.
When the mains power supply is normal, the rectifier inside the power module will rectify the mains
power supply to a positive and negative DC voltage, and the DC voltage will output a stable 220Vac
AC voltage to supply the load after the inverter. When the system detects the inverter normal, it will
supply the inverting voltage to load.
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