BlueSun BSM8K-B Manual de usuario

Bluesun Series

String Inverter

User Manual

Version: V1.0

(BSM8K-B~BSM33K-B)

About this manual

For Readers

This manual is helpful for technicians who install, debug, operate and maintain string inverters of

Please read this manual carefully before operates the product .

Readers are required to know the basic knowledge about electric components, wiring, signs and

mechanical drawings.

Outlines

Chapter Contents

1 Safety Precautions This chapter describes the safety precautions when transporting, storing, installing,

running and maintaining the Inverter.

2 Product Description This chapter describes the basic principles, naming rules, product configuration and

data.

3 System Installation This chapter describes the unpacking inspection, installation tools, installation

environment, reserved space, fixing method, cable connection.

4 Commissioning

Guide

This chapter describes the inspection before startup, Commissioning and startup of

string inverter.

5 Maintenance and

Troubleshooting

This chapter describes the daily maintenance methods, maintenance intervals and

troubleshooting of the product.

6 Inverter handling

Guide

This chapter describes the basic requirements and precautions when disassembling,

replacing, and scrapping the inverter.

Warning Signs in This Manual

DANGER

It shows that there is a significant potential danger. If the operation is not performed

according to requirements, serious injury or damage may be caused to people or

equipment.

WARNING

It shows that there is a general potential danger. If the operation is not performed

according to requirements, general injury or damage may be caused to people or

equipment.

CAUTION

It shows that there is a general potential danger. If the operation is not performed

according to requirements, general injury or damage may be caused to equipment.

Terms and Abbreviations

Terms/Abbreviations Description

MPPT Maximum Power Point Tracking

Photovoltaic string Multiple solar cell arrays in parallel or series.

EEPROM Electrically Erasable Programmable Read-Only Memory

hopeInsight A monitoring and debugging software for inverter.

Version Description

Version Release Date Description

V1.0 2021-8-5 The first version

Bluesun

Content About this manual ·················································································· 5

Content ································································································· 7

1 Safety Precautions··············································································· 1

1.1 Transportation·······················································································1

1.2 Storage ·······························································································1

1.3 Installation····························································································2

1.4 Operation·····························································································2

1.5 Maintenance·························································································3

2 Product Description············································································· 5

2.1 Product Description················································································5

2.1.1 Schematic Diagram ·············································································· 5

2.1.2 Operation Mode··················································································· 6

2.2 System Configuration and Application·························································6

2.2.1 Application Description·········································································· 6

2.2.2 Supported Grid Form ············································································ 7

2.3 Naming Rules ·······················································································7

2.4 Nameplate label ····················································································8

2.5 Machine Configuration ············································································9

2.6 Signs and labels ·················································································· 11

2.7 Warning Labels in Inverter ····································································· 11

2.8 Technical Data ···················································································· 12

2.9 Mechanical Parameters········································································· 13

2.10 Ambient Requirements ········································································ 14

3 System installation ·············································································17

3.1 Unpack and inspection·········································································· 17

3.2 Preparation of installation tools ······························································· 17

3.3 Installation environment requirements ······················································ 17

3.4 Requirements for reserved space ···························································· 18

3.5 Fixing method ····················································································· 19

3.6 Electrical connection············································································· 20

3.6.1 Cable requirements ············································································ 20

3.6.2 Recommended cable specifications······················································· 20

3.6.3 Torque requirements··········································································· 21

3.6.4 Preparation before operation································································ 21

3.6.5 Connect the ground wire ····································································· 22

3.6.6 Connect the AC output cable ································································ 22

3.6.7 Connect the communication cable························································· 24

3.6.8 Connect DC input cables ····································································· 25

4 Commissioning Guide·········································································27

4.1 Check before starting············································································ 27

4.2 Power on the system ············································································ 28

4.3 Power off the system ············································································ 28

5 Maintenance and troubleshooting ························································29

5.1 Maintenance items and cycle·································································· 29

5.2 Troubleshooting··················································································· 30

6 Inverter handling instructions ······························································35

6.1 Disassembly of the inverter ···································································· 35

6.2 Replace the inverter ············································································· 35

6.3 Package the inverter············································································· 35

6.4 Scrapped the inverter ··········································································· 35

1 Safety Precautions

This chapter describes the safety precautions to be observed during the installation, operation

and maintenance of inverter. Please carefully read the safety precautions before the installation,

maintenance and other operations of inverter. All personals must strictly observe safety

precautions during the operation. Personal injury or damage to inverter and associate devices

may occur if the safety precautions are ignored.

When operating the inverter, please pay particular attention to the following items:

DANGER

1. Only qualified professionals can install, operate and maintain the inverter.

2. Please avoid toppling and knocking the inverter cabinet during moving the inverter.

3. Prevent liquid, debris or chippingsfrom getting inside the inverter; a conductive fluid and debris may cause

an internal short circuit of inverter and result in equipment damage.

4. Before completing installation and maintenance, the inverter must be isolated from power grid and other

electrified devices.

5. Please make sure that relevant protective measures have been taken to avoid electric shock, fire or other

accidents.

WARNING

Don

't place explosive and inflammable substances around the inverter!

1.1 Transportation

WARNING

1. Please keep the inverter well packed and upward, avoid strong shock or collision during the transportation.

2. Please transport the inverter with package and operate in accordance with the signs and labels during the

transportation. Please refer to "2.6 Signs and labels" for detailed information.

3. Please ensure the transportation environment can meet the requirements. Please refer to "2.10 Ambient

Requirements" for detailed information.

1.2 Storage

WARNING

The storage environment of inverter should meet the corresponding requirements. Please refer to "2.10

Ambient Requirements" for detailed information.

About long-term storage:

Before or after the installation, it's regarded as long-term storage if the inverter has been in the no power

supply status for over three weeks. Please pay attention to the following issues about long-term storage:

Put the desiccant into several equipment cabinets and pack the inverter with packaging materials;

Attention must be paid to ventilation and moisture prevention where equipment is stored and any water is

strictly prohibited;

Necessary measures must be taken to deal with adverse environments, such as abrupt cooling and

heating, collision and dust storm to prevent damages to the inverter.

Regular inspection at least once a week, inspect whether the package is intact and prevent it from

damages caused by insects and rats. Please replace the damaged package immediately.

The inverter shall be unpacked, inspected, repacked, and replace the new desiccant if it is stored for over

User Manual of String Inverter

half a year.

Don't store the inverter without package.

1.3 Installation

DANGER

1. The DC switch and breaker of the inverter must be cut off and the inverter shell must be reliably grounded

before any operation is conducted inside the inverter.

2. The inverter must be grounded canonically and the dimension of grounding conductor must conform to the

requirements of security specifications to ensure the personal safety.

3. Don't place explosive and inflammable substances around the inverter.

WARNING

1. The installation environment of the inverter must have good ventilation and heat dissipation, the inverter

can’t expose to the sunlight directly.

2. It's advised to fix the inverter by four personals to avoid mechanical injury. Please take safety measures to

prevent injury during installation.

3. Liquid, dust or debris must be prevented from entering the inverter during installation and maintenance as

conducting liquid and debris may cause short circuit inside the inverter, thus damaging the equipment.

4. Please ensure the installing torque of power cable is proper during the wiring of external cables and

inverter, excessive torque will damage the screw, and too small torque will increase the contact resistance

and result in overheating.

5. The terminal of the power cable connected with the inverter must comply with national standard as

substandard terminal or disqualified construction may lead to overheating of the power cable and outbreak

of fire in severe cases.

6. Installation place must meet the operation environment requirements. Please refer to "2.10 Ambient

Requirements" for detailed information.

1.4 Operation

DANGER

1. During the operation of inverter, the cabinet door of inverter needs to be locked to avoid electric shock and

other personnel injuries, which can also prevent salinity, water, dust or other conducting materials in the air

from entering into inverter.

2. Please keep the surrounding environment of operating inverter non-corrosive.

3. Don't place explosive and inflammable substances within two meters from the inverter.

4. Don't touch the internal board, components, cables and terminal blocks of inverter during the powering on.

5. When there are faults or abnormal smell or sound, turn off the DC switch and open the breaker of AC side

immediately.

WARNING

1. Power on the inverter only after completing the installation and properly connecting the cables.

2. Do not conduct any insulation resistance test or high-voltage resistance test for inverter, because wrong

test may cause damages to inverter.

3. Cut off wiring between inverter and external equipment when conducting insulation and voltage resistance

test for external equipment.

1 Safety Precautions

1.5 Maintenance

1. Please cut off the AC side breaker first, then cut off the DC switch, and wait for at least 5 minutes before

performing maintenance.

2. Please prevent irrelevant personals from entering maintenance scene during the maintenance.

3. Please maintain the inverter under the condition of understanding this manual and being equipped with

proper tools and test devices.

4. Please wear insulating gloves and safety shoes for you safety.

WARNING

Regular check and maintenance must be performed, please refer to "5 Maintenance and troubleshooting" for

details.

--Chapter End--

2 Product Description

2.1 Product Description

Bluesun series three -phase string on-grid inverter is independent developed by Bluesun.

it's main function is converting DC current generated by PV arrays into AC current and feeding it

into the grid.

Bluesun BSM8K-B/10K-B/12K-B are 2-input string inverters. Bluesun BSM15K-B/17K-B are

3-input string inverters. Bluesun BSM20K-B/22K-B/25K-B are

4-input string inverters. Bluesun

BSM30K-B/33K-B

are 6-input string inverters. These products only suit for 400VAC low-voltage

grid-connected scenarios, such as village-level photovoltaic power stations below 400KW or

industrial and commercial rooftop photovoltaic power stations.

2.1.1 Schematic Diagram

Bluesun BSM8K-B/10K-B/12K-Bare connected to the inverter through 2 PV string inputs.

Bluesun BSM15K-B/17K-B are connected to the inverter through 3 PV string inputs. Bluesun

BSM20K-B/22K-B/25K-B are connected through 4 PV string inputs In the inverter. Bluesun

BSM30K-B/33K-B are connected to the inverter through 6 PV string inputs. There are 2 MPPT

inside the inverter for MPPT tracking of the strings, and then the inverter circuit realizes DC

conversion to three-phase Alternating current as he schematic diagram below.

1+2+1-2-

InputEMIFilterMPPTCircuit1MPPTCirciut2

BUS+BUS-

Three-l evel invertcircuitLCLFilter

RCD l eakage curr ent detection

OutputEMIFilter

NABC

Figure 2-1 Two-input string inverter system schematic diagram

1+2+1-2-3+3-PEInputEMIFilterMPPTCircuit1MPPTCircuit2BUS+BUS-Three-levelinvertcircuitLCLFilterRCD l eakage curr ent detectionOutputEMIFilterNABC

Figure 2-2 Three-input string inverter system schematic diagram

OutputEMIFilter1+2+1-2-3+4+3-4-PEInputEMIFilterMPPTCircuit1MPPTCirciut2BUS+BUS-Three-l evel invertcircuitLCLFilterNABCRCD l eakage curr ent detection

Figure 2-3 Four-input string inverter system schematic diagram

1+2+1-2-3+4+3-4-5+6+5-6-

InputEMIFilterMPPTCircuit1MPPTCircuit2

BUS+BUS-

Three-phaseinvertcircuitLCLFilterOutputEMIFilter

NABCPERCD l eakage curr ent detection

Figure 2-4 Six-input string inverter system schematic diagram

circuits

User Manual of String Inverter

2.1.2 Operation Mode

HV string inverter includes three operation modes: standby mode, operation mode

and shutdown mode. The three mode switching conditions are shown in Figure 2-5.

Standby

Mode

Operation

Mode

Shutdown

Mode

Operation mode to standby mode:

Insufficient sunshine or DC switch

is turned off

Standby mode to operation mode:

Abundant sunshine without

system faults

Fault or shutdown command is detected

Standby mode to

shutdown mode: fault or

shutdown command is

detected

Shutdown mode to standby

mode: fault is deleted or

startup command is detected

Figure 2-5 string inverter operation mode

Operation Mode

Description

andby

1) Standby mode mainly refers to the external environment doesn't meet the operation

condition, such as insufficient sunshine or DC switch is turned off. Under this mode, the

inverter continuously performs self-checking and enters operation mode once the

operation conditions are satisfied.

2) Under standby mode, the inverter will enter shutdown mode after detecting the

shutdown command or faults.

peration

1) Under the operation mode, the inverter converts DC current of photovoltaic arrays into

AC current and feeds it to the grid. The inverter performs MPPT arithmetic and outputs

the maximum power of photovoltaic arrays.

2) The inverter will enter shutdown mode after detecting the faults or shutdown

command.

3) The inverter will enter standby mode after detecting the input power of photovoltaic

arrays is lower than the on-grid power generation condition.

hutdown

1) If the inverter detects a fault occurrence or shutdown command during standby or

operation mode, it enters shutdown mode.

2) In the shutdown mode, if the inverter detects that the fault has been cleared or the

power-on command, it enters standby mode.

2.2 System Configuration and Application

2.2.1 Application Description

Figure 2-6 shows the application diagram of the string inverter network, Figure 2-7 shows the

design scheme of the distributed PV power plant.

Photovoltaic

panel

String

inverter Measuri ng unit Grid

Figure 2-6 Application diagram of the string inverter network

Bluesun

2 Product Description

String inverter

PV arrays

Box-type

transformer

Power grid

User load

WiFi/GPRS

wireless module

Mobile

Internet

hopeCloud

hopeView

Client

Central monitoring center

Figure 2-7 Design scheme of the l distributed PV power plant

2.2.2 Supported Grid Form

BluesunBSM8K-B ~ Bluesun BSM33K-B support the TN -S , TN -C , TN -C -S ,TT IT sys tems in Figure

2-8.

Figure 2-8 Schematic diagram of IT system

2.3 Naming Rules

30K-B

Rated output power:

30K--30kW 33K--33kW…String inverter series

Output side without

isolationtransformer

Figure 2-9 Naming rules

BLUESUN BSM

User Manual of String Inverter

2.4 Nameplate label

(Note: The data is for reference only; please refer to the physical or technical agreement of the

corresponding product for actual parameters)

PV Grid-interactive

Inverter

贴序列号标签

Protection Class：I Model: BSM30K-B

Serial No.:

Ingress Protection：IP65

Max.Output Power：33kW

Bluesun Solar Co., Ltd

www.bluesunpv.com

Nominal Output Voltage：400Va.c./230Va.c.;3P+N+PE

Nominal Output Frequency：50Hz/60Hz

Max.Output Current：47.8A

Rated Output Power：30kW

Operating Ambient Temperature：-40 to +60℃

Power Factor：0.8 -0.8

（lagging）（leading）

Max. Input Current：40A/40A

Isc PV：60A/60A

Max.Input Voltage：1100Vd.c.

MPP Voltage Range：200-1000Vd.c.

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