KEHUA TECH BCS-B-H Series User manual

Power Conversion System
BCS-B-H Series (1000K-1500K)
User Manual

All rights reserved © Kehua Data Co., Ltd.
i
Copyright © Kehua Data Co., Ltd. 2021.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 Data Co., Ltd.
Trademarks and Permissions
and other Kehua trademarks are trademarks of Kehua Data 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 DATA CO.,LTD.
Address:
No.457,MalongRoad,TorchHigh-TechIndustrialZone,Xiamen,Fujian,China
Website:
www.kehua.com
E-mail:
[email protected]
Customer Service Telephone:
400-808-9986
Tel:
0592-5160516
Fax:
0592-5162166

Foreword
Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
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All rights reserved © Kehua Data Co., Ltd.
Foreword
Summaries
Thank you for choosing the power conversion system (hereinafter referred to as “PCS”)!
This document gives a description of BCS-B-H series (1000K-1500K), 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
BCS1000K-B-H (440Vac)
BCS1250K-B-H (550Vac)
BCS1500K-B-H (600Vac)
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.
Anti-static prompting.

Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
Foreword
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Symbol
Description
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: GB-T 34120-2017

Contents
Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
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All rights reserved © Kehua Data Co., Ltd.
Contents
1 Safety Description.........................................................................................................................1
1.1 Safety Announcements.....................................................................................................................................1
1.1.1 Safety Instructions ..................................................................................................................................1
1.1.2 Device Iabel Instruction..........................................................................................................................3
1.1.3 Anti-Static Protection..............................................................................................................................4
1.1.4 Grounding Requirements........................................................................................................................4
1.1.5 Moistureproof Protection........................................................................................................................5
1.1.6 Safety Warning Label Setting .................................................................................................................5
1.1.7 Measure with Electricity.........................................................................................................................5
1.2 Requirements for Operator...............................................................................................................................6
1.3 Environment Requirements..............................................................................................................................6
1.4 Requirements for Escape Way..........................................................................................................................6
2 Overview.........................................................................................................................................7
2.1 Product Intro.....................................................................................................................................................7
2.1.1 Model Meaning.......................................................................................................................................8
2.1.2 Features...................................................................................................................................................8
2.2 Appearance and Operation Panel .....................................................................................................................9
2.2.1 Appearance..............................................................................................................................................9
2.2.2 Operation Panel.....................................................................................................................................10
2.3 Structure Layout.............................................................................................................................................12
2.3.1 DC Electric Disconnect Switch.............................................................................................................12
2.3.2 AC Breaker ...........................................................................................................................................14
2.4 Work Principle................................................................................................................................................16
2.5 Work Status ....................................................................................................................................................16

Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
Contents
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2.6 Work Mode.....................................................................................................................................................18
2.7 Communication Way......................................................................................................................................19
2.7.1 Monitor Mode.......................................................................................................................................19
2.7.2 Communicate with BMS.......................................................................................................................19
3 Installation....................................................................................................................................21
3.1 Installation Procedure.....................................................................................................................................21
3.2 Installation Preparation ..................................................................................................................................22
3.2.1 Installation Tools...................................................................................................................................22
3.2.2 Installation Environment.......................................................................................................................23
3.2.3 Installation Clearance............................................................................................................................23
3.2.4 Heat Dissipation Requirements.............................................................................................................24
3.3 Transportation ................................................................................................................................................25
3.3.1 ForkliftTransportation...........................................................................................................................26
3.3.2 Lift Transportation ................................................................................................................................26
3.4 Unpacking......................................................................................................................................................27
3.5 Installation Procedure.....................................................................................................................................29
3.6 Electrical Connection.....................................................................................................................................32
3.6.1 Wiring Requiremnts..............................................................................................................................32
3.6.2 Wiring ...................................................................................................................................................32
3.7 Check the Installation.....................................................................................................................................37
4 Touch Screen Operation ............................................................................................................38
4.1 Menu Structure...............................................................................................................................................38
4.2 Main Page ......................................................................................................................................................39
4.3 Login..............................................................................................................................................................40
4.4 ON/OFF .........................................................................................................................................................42
4.4.1 ON.........................................................................................................................................................42
4.4.2 OFF.......................................................................................................................................................42
4.5 Energy Query .................................................................................................................................................43
4.5.1 Daily Energy.........................................................................................................................................43
4.5.2 Monthly Energy ....................................................................................................................................44

Contents
Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
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4.5.3 Total Energy..........................................................................................................................................45
4.6 Function .........................................................................................................................................................46
4.6.1 Running Infomration.............................................................................................................................46
4.6.2 History Information ..............................................................................................................................48
4.6.3 About.....................................................................................................................................................49
4.6.4 Setting...................................................................................................................................................49
4.7 Current Fault ..................................................................................................................................................61
5 System Commissioning .............................................................................................................62
5.1 Running Operation.........................................................................................................................................62
5.1.1 Check before Operation........................................................................................................................62
5.1.2 Startup Procedure..................................................................................................................................62
5.2 Power Off in Emergency or Fault ..................................................................................................................63
5.3 Recover Normal Operation From Emergency Power Off ..............................................................................63
6 Routine Maintenance .................................................................................................................65
6.1 Maintenance Guide ........................................................................................................................................65
6.1.1 Machine Room Management................................................................................................................65
6.1.2 Preventive Maintenance........................................................................................................................66
6.2 Safety Precautions..........................................................................................................................................69
7 Troubleshooting..........................................................................................................................70
7.1 Rectifying Common Faults ............................................................................................................................70
7.2 Maintenance Operation Procedure.................................................................................................................77
8 Package, Transportation and Storage......................................................................................79
8.1 Package ..........................................................................................................................................................79
8.2 Transporation..................................................................................................................................................79
8.3 Storage ...........................................................................................................................................................79
A Technical Specifications...........................................................................................................80
B Fasten Torque List......................................................................................................................83
C Quality Assurance......................................................................................................................84
D Acronyms and Abbreviations..................................................................................................86

Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
1 Safety Description
All rights reserved © Kehua Data Co., Ltd.
1
1 Safety Description
This chapter introduces the safety announcements. Please read this user manual carefully prior to
installing the device. It provides important information on safe and efficient installation.
1.1 Safety Announcements
Before operation, please read the announcements and operation instructions in this part, which is to
avoid accident.
The DANGER, WARNING, CAUTION in the manual, are not all the safety announcements that
must be abided by, they are just the supplement of the safety announcements during operating.
Kehua 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
It is prohibited touching any terminal or conductor that connected with grid circuit, or, it may cause
deadly danger.

1 Safety Description
Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
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All rights reserved © Kehua Data Co., Ltd.
There is no operational part inside the device. Please do not open the crust of the PCS by yourself, or
it may cause electric shock. The PCS damage caused by illegal operation is out of the guarantee
range.
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.
Before checking or maintenance, if the DC side and AC side is power down just now, it is necessary
to wait for 20 minutes to ensure the inner device is completely discharged, and then the operation can
be performed.
While maintenance, ensure that the connection between the PCS and energy storage battery has been
disconnected, and set warning mark at the disconnected position, which is to avoid reconnection by
accident.
The product may cause DC current in external protective earthing conductor. If adopt residual current
device (RCD) or monitor (RCM) as the protection of direct or indirect contacting, the type-B-H RCD
or RCM can be used only in the input end of the product.

Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
1 Safety Description
All rights reserved © Kehua Data Co., Ltd.
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Please do not put finger or tool into rotating fans to avoid endanger the human safety or damage the
device.
No liquid or other objects are allowed to enter the cabinet.
The product is grade A device. If the product is used in resident living, it may cause wireless
interference. User should take actions to avoid the interference.
In case fire, please use dry power fire extinguisher. If using liquid fire extinguisher, it may cause
electric shock.
1.1.2 Device Iabel Instruction
The labels on or in the device contain the important information about safe operation. It is strictly
prohibited to tear up or damage them!
Table1-1 Label illustration
Label
Illustration
There is dangerous voltage inside the device, which may endanger
human safety. Be care electric shock prompting.

1 Safety Description
Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
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All rights reserved © Kehua Data Co., Ltd.
Label
Illustration
Please consult the user manual while using.
It is necessary to put aside the device for 20min after powering down
to ensure completely discharged.
Do not dispose with general garbage. It needs to recycle by special
method.
Pay attention to safety.
External grounding label. It needs to connect with earth firmly to
ensure the safety of operator.
1.1.3 Anti-Static Protection
The static electricity generated by human bodies may damage the electrostatic-sensitive components
on boards. 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 ground 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.

Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
1 Safety Description
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1.1.5 Moistureproof Protection
Moisture incursion may cause the PCS damage!
For normal use of the PCS, please comply with the following items.
If the atmosphere humidity larger than 95%, please do not open the door of PCS.
On overcast or rainy or moist condition, avoid opening the door to maintain or other operation.
1.1.6 Safety Warning Label Setting
To avoid irrelevant person close to or misoperate the PCS, during installation or daily maintenance,
please abide by the related standards.
Set warning labels at the battery input end and AC input end of the PCS, which is to avoid
wrongly close and even cause accident.
Set warning label board or safety warning area, which is to avoid irrelevant person entering and
cause human injury or device damage.
After maintenance, ensure that pull out the key of the PCS and save it properly.
1.1.7 Measure with Electricity
There is dangerous high voltage, contacting by accident may lead to deadly danger. So, when
measure with electricity, it is necessary to do the protection (such as wear insulated gloves, etc.)
The measure meter must accord with the following requirements.
The range and sue condition of the measure meter should conform to the site requirements.
Ensure that connection of the measure meter is proper and normative, which is to avoid the
danger of electric arc, etc.

1 Safety Description
Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
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All rights reserved © Kehua Data Co., Ltd.
1.2 Requirements for Operator
The related operation and wiring for the PCS 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.
The operator should be familiar with the constitution and work principle of the whole energy
storage system.
The operator must be acquainted with the related standards of local nation and region.
Personnel under 14 years old and above 70 years old must not operate the power conversion
system.
1.3 Environment Requirements
The used environment may influence the service life and reliability of the device. So, please avoid
using the device in the following environment for long time.
The place where beyond the specification.
The place where has direct sunshine or rain.
The place where has vibration or easy impacted.
The place where has dust, corrosive material, salty or flammable gas.
The place where without good ventilation or closed.
The place where close to the resident living quarters.
1.4 Requirements for Escape Way
For safe evacuation in case of accident, please comply with following rules.
Keep the escape way unblocked during installing, operating, etc.
It is strictly prohibit to place any sundries on the escape way or occupy the escape way by any
other ways.

Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
2 Overview
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2 Overview
This chapter mainly introduces the product features, appearance, operation panel, work principle,
work modes, etc.
2.1 Product Intro
BCS-B-H series (1000K-1500K) PCS is researched and developed by Kehua Company, it is used in
the link of energy storage. The basic feature is bidirection (rectification, inversion), and it equips a
series of special performance and can be used in grid-tied and off-grid system. It can regulate and
control the electricity resource effectively and balance the difference of used electricity in different
seasons and day and night, and also, it guarantees the safety of grid. It is the important premise of
renewable energy sources and the effective means of realizing the interaction management of grid.
The PCS is the necessary link for achieving smart grid. The energy storage system is made up of
energy storage batteries, PCS and distribution system, boost transformer and load, as shown in
Figure2-1.
Battery PCS 10kV/35kV grid
Boost
transformer
Load
Figure2-1 Compose of energy storage system

2 Overview
Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
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All rights reserved © Kehua Data Co., Ltd.
The grid-tied power generation of the PCS should be allowed by local power supply department and
operate by professionals.
The AC side of the PCS must be connected with IT distribution system.
2.1.1 Model Meaning
BCS □□□K–B–H
Rated power
When it is “1000K”, it means the rated power is
1000K;
When it is “1250K”, it means the rated power is
1250K;
And so on.
Without built-in transformer
BCS series power conversion system
High voltage
Figure2-2 Model meaning illustration
2.1.2 Features
Battery management
Bidirectional current transformation, charge and discharge the storage battery.
Can be charged in constant current or equalized charge mode or floating charge mode.
Can be discharged in constant power or constant current mode.
Perfect physics parameter
At most, 40 sets of the PCS can be used in parallel system. If the max. power of the PCS is
1500K, for 40 sets of the PCS, the max. power can be 60MW. It decreases the expansion cost and
achieves the best benefit for user.
The communication rate can be 2*100M, which achieves inter-switch of independent operation
and parallel operation between two circuits. It enhances the system operation rate and satisfies
the user needs for high efficiency and high speed.
The DC input voltage range is very wide, which is the leading level in partners. It is suitable for
use in various grid conditions.

Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
2 Overview
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Easy operation and close to user
Adopts 7 inch touch screen to make the daily management and maintenance easily. The touch
screen shows real-time operation parameter and status of the system.
The PCS provides various communication ways to satisfy the needs of high speed
communication. The scheduling communication adopts RS485 and Ethernet, BMS
communication adopts RS485and CAN.
The system supports the electric communication protocol of 104 and 61850 (optional) and is
suitable for various sites.
Precise operation and maintenance, reliable design
Single PCS can realize the switch between VF mode and PQ mode free. It makes the operation
and maintenance more conveniently.
Adopts DSP digitization technology, each energy storage container battery can balance the
capacity of themselves, which make the battery capacity of each container the same.
When the system part fault, it will exit to protect itself real time, which won’t affect the running
of micro-grid and guarantee the user benefit.
Provides multi protection function, such as islanding effect, low voltage ride through, etc., to
guarantee the device safety.
Can be used in highland. The used altitude can be 4000m at most. When the altitude exceeds
2000m, it needs to decrease rated power to use.
Green and high efficient, energy conservation
It can be scheduled by grid and the active power, reactive power can be adjusted independently,
the power factor can be adjusted at will.
It is suitable for multi-type battery and the battery charging & discharging rate can be adjusted
among several settings to achieve max. profit.
2.2 Appearance and Operation Panel
2.2.1 Appearance
The appearance of the PCS is as shown in Figure2-3.

2 Overview
Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
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Figure2-3 Appearance
2.2.2 Operation Panel
The operation panel of the PCS is as shown in Figure2-4.
Figure2-4 Operation panel
The description for the operation panel is as shown in Table2-1.

Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
2 Overview
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Table2-1 Description of the operation panel
NO.
Silk-screen
Name
Description
○
1
RUN
RUN indicator
Green: If the indicator light on, that means the PCS
is working normally.
○
2
POWER
POWER indicator
Green: If the indicator light on, that means the
controlling power source is normal.
○
3
ALARM
ALARM indicator
Red: If the indicator light on, that means there is
fault detected; once the fault is removed, the
indicator will light off automatically.
○
4
-
Touch screen
Check the running parameters;
Check and change the work mode;
Check the fault information;
Check and change the time.
○
5
-
EPO emergency
power off button
EPO button is used to disconnect the connection of
the PCS and power grid in emergency, which ensure
the safety of the PCS.
Be sure to spin off the EPO button before the system
restart.
The EPO button is just used in emergency or device fault. When normal use, the ON/OFF operation
must be done according to ON/OFF instruction in the screen.
In emergency, press the EPO button directly to power off the converter rapidly.
After using EPO button, if you want to recover the normal running of the PCS, it needs to popup the
EPO button (rotate the button in clockwise) and reboot the control power.

2 Overview
Power Conversion System BCS-B-H Series (1000K-1500K)
User Manual
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2.3 Structure Layout
The structure of the PCS after opening the front door is as shown in Figure2-5.
Figure2-5 Structure layout (open front doors)
Distribution switch is not allowed to connect with external power source.
After using the AC disconnect switch, please dismantle and put it into box behind the front door.
DC power switch is used to supply power from DC side to inner PCS.
AC power switch is used to supply power from AC side to inner PCS.
Distribution switch is only used to supply power of 230V to external use.
2.3.1 DC Electric Disconnect Switch
DC electric disconnect switch is the connection switch of the PCS and energy storage batteries, as
shown in Figure2-6.
The DC electric disconnect switch cannot be disconnected or operated manually, it is auto controlled.
After power off normally, it will disconnected automatically.