Huawei SUN2000-12KTL User manual

SUN2000-(8KTL-12KTL) and SUN2000-(3KTL-
20KTL)-M0 Replacement
Quick Guide
HUAWEI TECHNOLOGIES CO., LTD.
Issue: 04
Part Number: 31500EPF
Date: 2021-11-22

1Copyright © Huawei Technologies Co., Ltd. 2021. All
rights reserved.
1. 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.
2. Before replacing the device, carefully read the SUN2000-(8KTL–20KTL)-M2 User Manual to
get familiar with product information and precautions.
3. Before replacing the device, check whether the configurations of SUN2000-(8KTL–12KTL) and
SUN2000-(8KTL–20KTL)-M0 can be viewed. If they can be viewed, record the parameter
settings for setting or checking parameters after the replacement.
4. Before replacing the device, check whether the cables are long enough. If not, prepare
appropriate cables.
1SUN2000-(8KTL–12KTL) Replacement Scenario
Remove SUN2000-
(8KTL–12KTL).
Install SUN2000-
(8KTL–20KTL)-M2.
Install the
PE cable.
•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 dielectric boots and begin
operating the SUN2000 with specialized insulation tools five minutes after the power-off.
1. Power off the SUN2000 to be replaced.
2. Remove the AC connector and remove the AC output power cable from the mating socket for
future use.
Removing SUN2000-(8KTL–12KTL)
1.1
Removing Cables from SUN2000-(8KTL–12KTL) for Future Use
Install the AC
output power cable.
Install DC input
power cables.
Install the
signal cable.
Replace the
SUN2000-(8KTL–
12KTL) protocol.
Check the installation
and power on the
SUN2000.
Start
End

2
3. Remove the DC connectors and use a cable cutter to cut off the terminals of DC input power
cables. Set the cables aside for future use.
Cable
cutter
Cable
cutter
The DC terminals of SUN2000-(8KTL–12KTL) must be cut off. If the DC connectors of SUN2000-
(8KTL–12KTL) are directly connected to SUN2000-(8KTL–12KTL)-M2, the SUN2000 may be
burnt.
4. Remove the RS485 communications cable and use a cable cutter to cut off the RJ45
connector. Set the cable aside for future use.
5. Remove the PE cable and remove the crimped OT terminal. Set the cable aside for future use.

3
Removing SUN2000-(8KTL–12KTL)
1. (Optional) Open the anti-theft lock. 2. Remove the two hexagonal screws.
3. Remove the SUN2000 from the rear panel. 4. Remove the nuts, spring washers,
and flat washers, and then remove
the rear panel.

4
Installing SUN2000-(8KTL–20KTL)-M2
1.2
1. Install the new rear panel. 2. Install the mounting bracket.
The installation of the new rear panel is the same as that of the SUN2000-(8KTL–12KTL) rear
panel. Align the mounting holes.
3. Install the SUN2000 onto the mounting bracket.
(Optional)
Install an anti-
theft lock.

5
Installing the AC Output Power Cable to SUN2000-(8KTL–20KTL)-M2
1.4
•Ensure that the protective layer of the AC output power cable is inside the connector, that
the core wires are totally inserted into the cable hole, and that the cable is connected
securely. Failing to do so may cause the device malfunction or damage.
•The hex key is delivered with the SUN2000 and bound to the hanging kit at the bottom of
the SUN2000.
It is recommended that silica gel or paint be applied around the ground terminal after the PE
cable is connected.
Installing the PE Cable for SUN2000-(8KTL–20KTL)-M2
1.3
1. Connect the AC output power cable to the AC connector.
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.
Hanging kit
Hex key
Hex Key
Stripping
Requirements

6
Five-Core Cable (L1, L2, L3, N, and PE)
•This section describes how to connect a five-core AC output power cable to an AC connector.
•A three-core AC output power cable can be connected similarly. The three-core cable (L1, L2,
and L3) is not connected to the N terminal or PE terminal.
•A four-core AC output power cable can be connected similarly. The four-core cable (L1, L2,
L3, and PE) is not connected to the N terminal, and the four-core cable (L1, L2, L3, and N) is
not connected to the PE terminal.
Click
2. Connect the AC connector to the AC output port.
AC output port (AC)
3. Check the route of the AC output power cable.

7
Installing DC Input Power Cables for SUN2000-(8KTL–20KTL)-M2
1.5
1. Ensure that the PV module output is well insulated to ground.
2. Use the positive and negative Staubli MC4 metal terminals and DC connectors supplied 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. The DC input voltage of the SUN2000 shall not exceed 1080 V DC under any circumstance.
4. Before installing DC input power cables, label the cable polarities to ensure correct cable
connections.
5. If the polarity of the DC input power cables is reversed, do not operate the DC switch as well
as positive and negative connectors immediately. Failing to do so may cause device damage,
which is not covered under 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 OFF, remove the positive
and negative connectors, and correct the polarity of the DC input power cables.
1. Assemble DC connectors.
Click
Positive metal terminal
Negative metal terminal Ensure that the cable
cannot be pulled out
after being crimped.
Positive connector
Negative
connector
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.
Ensure that cable
polarities are correct.
PV-CZM-22100/19100 (Staubli)
PV-MS-HZ open-
end wrench
(Staubli)
DC input terminals
2. Install the DC input power cables.
If the original DC input power cables are not long enough, add DC input extension cables.

8
Click
Pull the DC input power cables back to
ensure that they are connected securely.
Extension cables for DC terminals
Pin
Definition
Functions
Remarks
Pin
Definition
Functions
Remarks
1
485A1
-1
RS485A, RS485
differential
signal+
Used for
SUN2000
cascading or
connecting to
the RS485
signal port on
the
SmartLogger
2
485A1
-2
RS485A, RS485
differential
signal+
Used for
SUN2000
cascading or
connecting to
the RS485
signal port on
the
SmartLogger
3
485B1
-1
RS485B, RS485
differential
signal
–
4
485B1
-2
RS485B, RS485
differential
signal
–
5
PE
Ground point
on the shield
layer
N/A
6
PE
Ground point
on the shield
layer
N/A
7
485A2
Reserved
N/A
8
N/A
N/A
N/A
9
485B2
Reserved
N/A
10
N/A
11
N/A
N/A
N/A
12
N/A
13
GND
Reserved
N/A
14
N/A
15
DIN5
Reserved
N/A
16
N/A
Communications Port Signal Definitions for SUN2000-(8KTL–20KTL)-M2
Installing the Signal Cable for SUN2000-(8KTL–20KTL)-M2
1.6
Ensure that the protective
layer of the cable is inside
the connector, that excess
core wires are cut off from
the protection layer, that
the exposed core wire is
totally inserted into the
cable hole, and that the
cable is connected securely.
Communications Port Signal Definitions for SUN2000-(8KTL–12KTL)
No. Color Pin Description
1 White and orange RS485A, RS485 differential signal+
2 Orange RS485B, RS485 differential signal–
3 White and green PGND
4 Blue RS485A, RS485 differential signal+
5 White and blue RS485B, RS485 differential signal–
6 Green PGND
7 White and brown PGND
8 Brown PGND

9
Terminals for the Signal Cable
(Optional) Connecting RS485 Communications Cables (SUN2000 Cascading)
1. Connect the signal cable to the signal connector.
The figures show the RJ45
connector when the surface without
the fastener faces upwards. If the
colors and functions of the wires are
different, connect the wires based
on their functions.