Huawei SUN2000-55KTL User manual

HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-(55KTL, 60KTL)-Serie
Quick Guide
Issue: 06
Part Number: 31508435
Date: 2019-06-30

1Copyright © Huawei Technologies Co., Ltd.
2019. All rights reserved.
1Product Overview
Indicator Description
Front View
Indicator
Status
Description
PV connection
indicator
DC input
detection
status
Blinking green
The DC input is normal.
Blinking red
DC input detection is in progress.
Steady red
The DC input is abnormal.
PV string
connection
status
Steady green
At least one PV string is properly connected, and
the DC input voltage of the corresponding MPPT
circuit is higher than or equal to 600 V.
Off
The SUN2000 disconnects from all PV strings, or
the DC input voltage of each MPPT circuit is less
than 600 V.
Grid
-tied
indicator
Steady green
The SUN2000 has connected to the power grid.
Off
The SUN2000 does not connect to the power grid.
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 installing the device, carefully read the user manual to get familiar with product
information and precautions.
3. Only qualified and trained electrical technicians are allowed to operate the device. Operators
should understand the components and functioning of a grid-tied PV power system, and they
should be familiar with relevant local standards.
4. Before installing the device, check that package contents are intact and complete against the
packing list. If any damage is found or any component is missing, contact the dealer.
5. Use insulated tools when installing the device. For personal safety, wear proper personal
protective equipment (PPE).
6. Huawei shall not be liable for any consequence caused by violation of the storage, moving,
installation, and operation regulations specified in this document and the user manual.
(1) PV connection indicator
(2) Grid-tied indicator
(3) Communication indicator
(4) Alarm/Maintenance indicator
(5) Maintenance compartment door
(6) Host panel cover

2
Ports
Indicator
Status
Description
Communication
indicator
Blinking green
The SUN2000 receives data
over RS485 or PLC
communication.
Off
The SUN2000 has not received
data over RS485 or PLC
communication for 10 seconds.
Alarm/Maintenan
ce indicator
Alarm status
Blinking red at long intervals (on
for 1s and then off for 4s)
A warning alarm is generated.
Blinking red at short intervals (on
for 0.5s and then off for 0.5s)
A minor alarm is generated.
Steady red
A critical alarm is generated.
Local
maintenance
status
Blinking green at long intervals
(on for 1s and then off for 1s)
Local maintenance is in
progress.
Blinking green at short intervals
(on for 0.125s and then off for
0.125s)
Local maintenance fails.
Steady green
Local maintenance succeeds.
Waterproof cable connector is abbreviated as waterproof connector in the following text.
NOTE
(1) Waterproof cable connector (AC OUTPUT)
(2)
Waterproof cable connector (RESERVE)
(3)
USB port (USB)
(4) DC switch 1 (DC SWITCH 1)
(5)
DC switch 2 (DC SWITCH 2)
(6)
Waterproof cable connector (COM1, COM2,
and COM3)
(7)
DC input terminals (controlled by DC
SWITCH 1)
(8)
DC input terminals (controlled by DC
SWITCH 2)

3
2Installation Requirements
Installation Angle
2.1
SUN2000 Dimensions Mounting Bracket Dimensions

4
Installation Space
2.2
For ease of installing the SUN2000
on the mounting bracket,
connecting cables to the bottom of
the SUN2000, and maintaining the
SUN2000 in future, it is
recommended that the bottom
clearance be between 600 mm
and 730 mm.
NOTE
3Installing the SUN2000
The SUN2000 mounting bracket has four groups of tapped holes, each group containing four
tapped holes. Mark any hole in each group based on site requirements and mark four holes in
total. Two round holes are preferred.
The bolts supplied with the SUN2000-60KTL-HV-D1 are M12x40 bolt assemblies. The bolts
supplied with other models of SUN2000s are M12x60 expansion bolts and M12x40 bolt
assemblies. If the bolt length does not meet the installation requirements, prepare M12 bolt
assemblies by yourself and use them together with the delivered M12 nuts.
The following describes how to install the SUN2000 by using support installation as an example.
For details about wall-mounted installation, see the user manual.
NOTE
Round
holes

5
1. Set the security torx wrench aside after removing it from the mounting bracket.
2. You are advised to apply anti-rust paint on the hole positions for protection.
NOTE

6
Electrical Connections
4Installing the Ground Cable
4.1
4
•The ground point on the enclosure is preferred to connect to the PE cable for the SUN2000.
•The ground point in the maintenance compartment is mainly used for connecting to the ground
cable included in the multi-core AC power cable. For details, see section "4.3 Installing AC
Output Power Cables."
•You need to prepare M6 OT terminals by yourself.
•The outdoor copper-core cable with a cross-sectional area of 16 mm2is recommended. The
ground cable must be secured.
•It is recommended that PGND cable of the SUN2000 be connected to the nearest ground point.
For a system with multiple SUN2000s connected in parallel, connect the ground points of all
SUN2000s to ensure equipotential connections to ground cables.
•To enhance the corrosion resistance of the PE terminal, apply silica gel or paint on it after
connecting the PGND cable.
NOTE
1. Loosen the two screws on the maintenance compartment door using a security torx wrench.
Opening the Maintenance Compartment Door
4.2
1. Never open the host panel of the SUN2000.
2. Before opening the maintenance compartment door, turn off the downstream AC output switch
and the two DC switches at the bottom.
3. If you need to open the maintenance compartment door on rainy or snowy days, take protective
measures to prevent rain and snow entering the maintenance compartment. If it is impossible to
take protective measures, do not open the maintenance compartment door on rainy or snowy
days.
4. Do not leave unused screws in the maintenance compartment.

7
2. Open the maintenance compartment door and install the support bar, which is bound to the
inductor cover at the bottom of the chassis.
3. Remove the cover and hang it on the hook of the chassis door.
If the screws on the chassis door are lost, obtain spare screws from the fitting bag bound to the
inductor cover at the bottom of the chassis.
NOTE
Installing AC Output Power Cables
4.3
You need to prepare M8 OT terminals by yourself. When using the outdoor copper cables for
AC connection, configure the copper wiring terminals. For the requirements on the cables and
terminals made of other materials, see the user manual.
If you connect a ground cable to the ground point on the chassis shell, you are advised to use a
three-core outdoor copper-core cable with a cross-sectional area of 25 mm2as the AC output
power cable.
If you connect a ground cable to the ground point in the maintenance compartment, you are
advised to use a four-core outdoor copper-core cable with a cross-sectional area of 25 mm2as
the AC output power cable.
NOTE

8
a. Three-core cable (excluding the
ground cable)
3. Remove an appropriate length of the jacket and insulation layer from the AC output power
cable using a wire stripper. (Ensure that the jacket is in the maintenance compartment.)
b. Four-core cable (including the ground
cable)
JacketInsulation layerCore wire
4. Prepare OT terminals.
Core wire
Insulation layer
Heat
gun
Hydraulic pliers
Heat shrink
tubing
1. Remove the locking cap from the AC OUTPUT connector and then remove the plug.
2. Choose whether to use rubber fittings based on the cable outer diameter and select one or more
rubber fittings if required. Route the cable through the locking cap and then the rubber fitting.
•To avoid damaging the rubber fitting, do not route a cable with a crimped OT terminal directly
through the rubber fitting.
•Do not adjust the cable when the locking cap is tightened. Otherwise, the rubber fitting will shift,
which affects the Ingress Protection Rating of the device.

9
5. Route the AC output power cable through the AC OUTPUT connector at the bottom of
the enclosure.
6. Connect the AC output power cable to the terminal block, and then tighten the nut using
a torque wrench that has an extension rod.
a. Three-core cable (excluding the ground cable) b. Four-core cable (including the ground cable)
Installing DC Input Power Cables
4.4
Selecting DC Input Terminals
Number
of Inputs
SUN2000
1
Connects to set 1.
2
Connects to routes 1 and 5.
3
Connects to routes 1, 3, and 5.
4
Connects to routes 1, 3, 5, and 7.
5
Connects to routes 1, 2, 3, 5, and 7.
6
Connects to routes 1, 2, 3, 5, 6, and
7.
7
Connects to routes 1, 2, 3, 4, 5, 6,
and 7.
8
Connects to routes 1, 2, 3, 4, 5, 6, 7,
and 8.
The SUN2000 provides two DC switches,
named as, DC SWITCH 1 and DC SWITCH2.
DC SWITCH 1 controls the first to fourth sets of
DC input terminals, whereas DC SWITCH 2
controls the fifth to eighth sets of DC input
terminals.
NOTE
•Ensure that AC terminations provide firm and solid electrical connections. Failing to do so may
cause SUN2000 malfunction and damage to its components, even start thermal events .
•If the AC output power cables are subject to a pulling force because the inverter is not installed
stably, ensure that the last cable that bears the stress is the PE cable.
7. Tighten the thread-lock sealing nut.
8. Clear debris from the maintenance compartment.

10
Ensure that the PV module output is well insulated to ground.
Before inserting the positive and negative connectors respectively into the positive and
negative DC input terminals of the SUN2000, check that the DC voltage does not exceed
1500 V using a multimeter and that the cables are connected correctly. Otherwise, the
SUN2000 will be damaged.
1. Use the Amphenol UTX PV connectors provided with the
SUN2000. If the terminals are lost or damaged, purchase the
PV connectors of the same model. The device damaged
caused by incompatible PV connectors is not covered under
any warranty or service agreement.
2. The metal contacts supplied with the Amphenol UTX PV
connectors are either the cold forming contacts or stamping
forming contacts. Choose the crimping tools that fit the metal
contact types. Do not mix up the tools.
3. Crimp the metal cold forming contacts using crimping tool
UTXTC0001 (recommended) or H4TC0001. When choosing
H4TC0001, do not use the locator.
4. Crimp the metal stamping forming contacts using crimping tool
UTXTC0002.
5. Before connecting DC input power cables, label the cable
polarities to ensure correct cable connections. If the cables are
connected incorrectly, the SUN2000 may be damaged.
6. Insert the crimped metal terminals of the positive and negative
power cables into the appropriate positive and negative
connectors. Then pull the DC input power cables to ensure that
they are connected securely.
7. Connect the positive and negative connectors to the
appropriate positive and negative DC input terminals. Then pull
the DC input power cables to ensure that they are connected
securely.
8. If polarity of the DC input power cable is reversed and the DC
switch is ON, do not turn off the DC switch immediately or
unplug positive and negative connectors. The device may be
damaged if you do not follow the instruction. The caused
equipment damage is beyond the warranty scope. Wait until
the solar irradiance declines and the PV string current reduces
to below 0.5 A, and then turn off the two DC switches and
remove the positive and negative connectors. Correct the
string polarity before reconnecting the string to the SUN2000.
Locator

11
If the voltage is a negative value, the DC input polarity is incorrect. Correct the polarity.
If the voltage is greater than 1500 V DC, too many PV modules configured to the same string.
Remove some PV modules.
Only after at least one PV string correctly connects to the MPPT1 circuit, can the SUN2000
enable the DC input detection function. Therefore, you are required to connect DC input power
cables to the MPPT1 circuit first.
Ensure
that the
locking
nut is
secured.
Installing DC Input Power Cables (Cold Forming Metal Contact)
Positive connector
Negative
connector
Positive metal terminal
Negative metal terminal Ensure that the cable
cannot be removed after
crimped.
Click
Recommended: PV cable
that meets the 1500 V
standard
Use a multimeter
to measure the
DC voltage.
UTXTC0001
(Amphenol)
UTXTWA001
(Amphenol)
Positive connector
Negative
connector
Positive metal terminal
Negative metal terminal Ensure that the cable
cannot be removed after
crimped.
Click
Recommended: PV cable
that meets the 1500 V
standard
Ensure
that the
locking
nut is
secured.
Use a multimeter
to measure the
DC voltage.
UTXTC0002
(Amphenol)
UTXTWA001
(Amphenol)
Installing DC Input Power Cables (Stamping Forming Metal Contact)

12
Selecting a Communication Mode
4.5
The SUN2000 supports either PLC or RS485 communication mode.
If PLC is used, you do not have to connect any communications cable to the SUN2000, but
have to connect the PLC CCO module or SmartLogger2000 to the AC power cable. For detailed
operations, see the PLC CCO01A User Manual or SmartLogger2000 User Manual.
If RS485 is used, do not connect the PLC CCO module to the AC power cable.
NOTE
Terminal Block Connection (Recommended)
The DJYP2VP2-22 2x2x1 computer cable or a communications cable with a conductor cross-
sectional area of 1 mm2and outer diameter of 14–18 mm is recommended.
1. Remove an appropriate length of the jacket
and core wire insulation layer from the
communications cable using a wire stripper.
3. Remove the cable terminal base from the
terminal block. Connect the communications
cable to the terminal base.
Installing the RS485 Communications Cable
4.6
2. Route the cable through the waterproof
connector.
No.
Port Definition
Description
1
RS485A IN
RS485A, RS485 differential signal+
2
RS485A OUT
RS485A, RS485 differential signal+
3
RS485B IN
RS485B, RS485 differential signal
–
4
RS485B OUT
RS485B, RS485 differential signal
–
1. When routing communications cables, separate communications cables from power cables to
prevent communication from being affected by signal interference.
2. An RS485 cable can connect to either a terminal block or an RJ45 network port. It is
recommended that the RS485 cable connect to a terminal block.

13
4. Install the terminal base on the terminal block,
and connect the shield layer to the ground
point.
5. Bind the communications cable.
When connecting the shielded cable, choose whether to crimp the OT terminal based on site
requirements.
NOTE
6. Tighten the thread-lock sealing nut and seal the waterproof connector.
No.
Color
Pin Definition
1
White
-and-
orange
RS485A, RS485
differential signal+
2
Orange
RS485B, RS485
differential signal
–
3
White
-and-green
N/A
4
Blue
RS485A, RS485
differential signal+
5
White
-and-blue
RS485B, RS485
differential signal
–
6
Green
N/A
7
White
-and-brown
N/A
8
Brown
N/A
1. Prepare an RJ45 connector.
You are recommended to use a CAT 5E outdoor shielded network cable with an outer diameter
less than 9 mm and internal resistance not greater than 1.5 ohms/10 m, as well as a shielded RJ45
connector.
RJ45 Network Port Connection
2. Route the cable through the waterproof
connector.

14
3. Insert the RJ45 connector into the RJ45
network port in the SUN2000 maintenance
compartment.
4. Bind the communications cable.
5. Tighten the thread-lock sealing nut and seal the waterproof connector.
5Checking After Installation
1.
The SUN2000 is installed correctly and securely.
Yes
□No □N/A □
2.
The DC switches and downstream AC switch are OFF.
Yes
□No □N/A □
3.
All ground cables are connected securely, without open circuits or
short circuits.
Yes
□No □N/A □
4.
AC output power cables are connected correctly and securely, without
open circuits or short circuits.
Yes
□No □N/A □
5.
DC input power cables are connected correctly and securely, without
open circuits or short circuits.
Yes
□No □N/A □
6.
The RS485
communications cable is connected correctly and securely.
Yes
□No □N/A □
7.
Check that all used waterproof connectors at the bottom of the
enclosure are sealed, and that the thread-lock sealing nut is tightened.
Yes
□No □N/A □
8.
The AC terminal cover is reinstalled.
Yes
□No □N/A □
9. The maintenance compartment door is closed and the door screws are
tightened.
Yes
□No □N/A □
10.
Unused DC input terminals are sealed.
Yes
□No □N/A □
11.
Unused USB ports are plugged with waterproof plugs.
Yes
□No □N/A □
12.
Unused waterproof connectors are plugged and the thread-lock
sealing nuts are tightened.
Yes
□No □N/A □

15
6DC Input Detection
Only after at least one PV string correctly connects to the MPPT1 circuit, can the SUN2000
enable the DC input detection function. Therefore, you are required to connect DC input power
cables to the MPPT1 circuit first.
The DC input detection function allows only independent access from each PV string to the
inverter. That means, the PV strings cannot be connected in parallel and then to the inverter.
The DC input detection only functions when the two DC switches on SUN2000 are OFF.
After the DC input power cable connects to the SUN2000 of this model, the SUN2000 detects the
DC input voltage of each route using the power generated by PV modules. After one PV string
correctly connects to the MPPT1 circuit, the SUN2000 can start the DC input detection function. DC
input detection can be performed automatically or manually.
The following table describes the LED indicator status and buzzer status under the condition that
the SUN2000 is detecting the DC input.
PV Connection
Indicator Status
Buzzer Status
Meaning
Blinking red
No sound
DC input detection is in progress.
Blinking green
No sound
The DC input is normal.
Steady red
Buzzing
The DC input is abnormal.
Automatic Detection
Following are the rules for starting automatic detection:
•Initial automatic detection is triggered 2 minutes after at least one PV string correctly connects to
the MPPT1 circuit.
•Within three days after initial automatic detection is triggered, the SUN2000 performs automatic
detection once every 10 minutes. From the fourth day, the SUN2000 performs automatic
detection only when the PV string voltage equals the lowest operating voltage of the SUN2000.
Perform manual detection by pressing the DC input detection button or using the SUN2000 app as
showing below:
•Once the DC input detection triggered, the detection process cannot be aborted or restarted
until detection cycle completed.
•The audible alarm can be manually turned off by pressing DC input detection button twice.
Manual Detection
DC Input detection button

16
SUN2000 Bluetooth module Mobile phone
1. Turn on the AC switch between the SUN2000 and the power grid.
2. Ensure that the DC switches at the inverter bottom are ON.
3. (Optional) Measure the temperatures at the joints between DC terminals and connectors using a
point-test thermometer.
Before turning on the AC switch between the SUN2000 and the power grid, use a multimeter to
check that the AC voltage is within the specified range.
Before turning on the DC switches on the SUN2000, ensure that the DC input power cable is
connected correctly.
To ensure that the DC terminals are in good contact, check the temperatures at the joints between
DC terminals and connectors after the SUN2000 has been running for a period of time. Ensure that
the temperature rise does not exceed 40°C.
NOTE
7Powering On the System
SUN2000 App
8
Connection over a Bluetooth Module
Data Cable Connection
SUN2000 USB data cable Mobile phone
1. The SUN2000 app enables the SUN2000 to communicate with the monitoring system through
a USB data cable or Bluetooth for you to query alarms, configure parameters, and perform
routine maintenance. The SUN2000 app is a convenient platform for local monitoring and
maintenance. The app name is SUN2000.
2. Mobile phone operating system: Android 4.0 or later, iOS 7.0 or later. When the iOS is used,
the app supports only Bluetooth connection.
3. Access the Huawei app store (http://appstore.huawei.com), Google Play
(https://play.google.com), or App Store (iOS), search for SUN2000, and download the
SUN2000 app software package.
4. Connect a USB data cable or a Bluetooth module to the USB port of the SUN2000 to enable
the communication between the SUN2000 and the app.
NOTE

17
9FAQ
How Should I View Active Alarms?
Connect a USB data cable or a Bluetooth module to the USB port of the SUN2000 to enable the
communication between the SUN2000 and the app. After login, tap Alarm on the main menu to
display the Active Alarm screen.
10 Troubleshooting
Symptom
Possible Cause
Suggestion
The PV string is
connected reversely.
The PV string cables are
connected reversely during
the SUN2000 installation.
Wait until the solar irradiance declines at night
and the PV string current reduces to below 0.5
A. Then, turn off the two DC switches, remove
the positive and negative connectors, and
rectify the connection of the DC input power
cable
.
Login screen Selecting a
connection mode
Main menu
screen
Connecting
Bluetooth Switching between users
Quick
settings The preset passwords for Common User,
Advanced User, and Special User are
00000a.
Use the initial password upon first power-on
and change it immediately after login. To
ensure account security, change the password
periodically and keep the new password in
mind. Not changing the initial password may
cause password disclosure. A password left
unchanged for a long period of time may be
stolen or cracked. If a password is lost, devices
cannot be accessed. In these cases, the user
is liable for any loss caused to the PV plant.
Set the correct grid code based on the application
region and scenario of the SUN2000.
NOTE

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Huawei Industrial Base, Bantian, Longgang,
Shenzhen 518129, People's Republic of China
www.huawei.com