Huawei SUN2000-15KTL-50KTL Series User manual

Replacing SUN2000-(15KTL-50KTL) Series with

SUN2000-(15KTL-50KTL)-M3 Series

Quick Guide

Issue: 03

Part number: 31500FWV

Date: 2021-05-25

HUAWEI TECHNOLOGIES CO., LTD.

1Removing the Original SUN2000

Remove the original

SUN2000 Install the new SUN2000 Perform electrical

connection

Verify the installation and

power on the SUN2000

Set spare part model

parameters

Start

End

1. The information in this document is subject to change due to version upgrade or other

reasons. 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.

2. Before replacing the device, carefully read the

Replacing SUN2000-(15KTL-50KTL) Series with

SUN2000-(15KTL-50KTL)-M3 Series User Manual

to get familiar with product information

and precautions.

3. Before replacing the device, check whether the SUN2000 settings can be viewed. If yes,

record them for setting or checking parameters after the replacement.

Original Model

Number of

PV Strings

Replacement Model

SUN2000

15KTL

SUN2000

-15KTL-M3

SUN2000

17KTL

SUN2000

-17KTL-M3

SUN2000

20KTL

SUN2000

-20KTL-M3

SUN2000

23KTL

SUN2000

-23KTL-M3

SUN2000

28KTL

SUN2000

-28KTL-M3

Before removing the original SUN2000, ensure that the DC switch on the SUN2000 and all

the switches connected to the SUN2000 are set to OFF. Otherwise, the high voltage of the

SUN2000 may result in electric shocks.

After the SUN2000 is powered off, the remaining electricity and heat may still cause electric

shocks and body burns. Therefore, put on protective gloves and begin operating the

SUN2000 five minutes after the power-off.

1. Power off the SUN2000 to be replaced.

2. Remove the AC connector.

a) Use a screwdriver to press the locking

plate on the AC output terminal.

b) Rotate the AC output connector

counterclockwise.

c) Remove the AC output connector.

SUN2000 V100R001 Replacement Scenario

4. Remove the DC connectors. 5. Remove the RS485 communications cable.

3. Remove the AC power cables.

6. Remove the PE cable.

7. (Optional) Open the antitheft lock. 8. Remove the two hexagonal screws.

9. Remove the SUN2000 from the back panel. 10.Remove the nuts, spring washers, and flat

washers, and then remove the back panel.

Mounting Bracket Dimensions

The mounting bracket has six groups of mounting holes, which are used to adjust the

installation height of the SUN2000.

In the SUN2000 V100R001 replacement scenario, it is recommended that the mounting bracket

be secured at hole 2. If it is difficult to connect cables at this height, select holes based on the

original cable length. The AC power cable length requirements should be preferentially met.

Recommended

holes

2Installing the SUN2000-(15KTL-28KTL)-M3 Series

3. Install the SUN2000 onto the mounting

bracket.

4. Tighten the screws on both sides of the

SUN2000.

1. Install the two mounting brackets together. 2. Align the mounting holes and install the

new mounting bracket.

Connect cables in accordance with local installation laws and regulations.

Before connecting cables, ensure that the DC switch on the SUN2000 and all the switches

connected to the SUN2000 are set to OFF. Otherwise, the high voltage of the SUN2000 may

result in electric shocks.

Do not connect the neutral wire to the enclosure as a PE cable. Otherwise, electric shocks may

occur.

The mounting holes of the engineering mounting kits must be identical to the original one. The

mounting holes can be directly aligned with those on the support. However, if you install the

mounting bracket on a wall, you need to make new holes.

3Connecting a PE Cable

1. Remove the AC terminal box and install partition boards.

Use a socket wrench and extension rod to connect the AC power cable. The extension rod

must be longer than 100 mm.

Do not install third-party devices in the AC connection box.

OT terminals are shipped with the SUN2000 package. The delivered OT terminals apply only

to cables of 8 mm2/10.0 mm2(7 AWG/8 AWG). For other types of cables, you need to

prepare OT terminals.

The PE point at the AC output port is used only as a PE equipotential point, and cannot

substitute for the PE point on the enclosure.

It is recommended that silica gel or paint be used around the ground terminal after the PE

cable is connected.

Reserved PE point

4Connecting the AC Output Power Cable

2. Connect the AC output power cable (using a four-core cable as an example).

1. Before connecting DC input power cables, ensure that the original DC terminals have been

cut off. If the original DC connector is directly connected to the SUN2000-(15KTL-50KTL)-M3

series, the inverter may be burnt.

2. Use the positive and negative Staubli MC4 metal terminals and DC connectors delivered with

the SUN2000. Using incompatible positive and negative metal terminals and DC connectors

may result in serious consequences. The caused device damage is not covered under

warranty.

3. You are advised to use the PV-CZM-22100 (Staubli) crimping tool and do not use it with the

positioning block. Otherwise, the metal terminals may be damaged. The PV-MS (Staubli) or

PV-MS-HZ (Staubli) open-end wrench is recommended.

4. Ensure that the PV module output is well insulated to ground.

5. The DC input voltage of the SUN2000 shall not exceed 1100 V DC under any circumstance.

6. Before installing DC input power cables, label the cable polarities to ensure correct cable

connections.

7. If a DC input power cable is reversely connected and the DC switch is turned on, do not

perform operations on the DC switch or the positive/negative connectors immediately.

Otherwise, the device may be damaged. The caused device damage is not covered under any

warranty. Wait until the night when solar irradiance declines and the PV string current drops

to below 0.5 A. Then set the DC switch to the OFF position, remove the positive and negative

connectors, and correct the polarity of the DC input power cable.

1. Cut off the original DC terminals.

DC Input Terminal Selection

In the spare part replacement scenario, the DC

input power cables can be connected only to PV1–

PV6. If the DC input power cables are connected

to PV7 or PV8, the inverter data cannot be

transmitted to the northbound device.

Number

of Inputs

Terminal

Number of

Inputs

Terminal

PV1

-PV6

PV1 and PV3

PV1, PV3, and PV5

PV1, PV2, PV3, and PV5

PV1, PV2, PV3, PV4, and PV5

PV1, PV2, PV3, PV4, PV5, and PV6

5Connecting DC Input Power Cables

2. Connect the DC power cables.

Positive connector

Negative

connector

Positive metal

terminal

Negative

metal terminal

Ensure that the cables

cannot be pulled out

after being crimped.

Click

PV-CZM-22100

PV-MS-HZ

Open-end

wrench

Ensure that

cable polarities

are correct.

Use the wrench

shown in the figure

to tighten the locking

nut. When the

wrench slips during

the tightening, the

locking nut has been

tightened.

If the original DC input power cables are not long enough, use the DC input extension cables

delivered with the package.

Click

Pull the DC input power cables back to

ensure that they are connected securely.

Extension cables for DC terminals

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