Huawei SUN2000 Series User manual

HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-(50KTL, 50KTL-C1)
Quick Guide
Issue: 08
Part Number: 31509128
Date: 2019-07-03

1
1Overview
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 device installation, carefully read the SUN2000-(50KTL, 50KTL-C1) User Manual to get
familiar with product information and safety 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 be
familiar with relevant local standards.
4. Before installing the device, check that deliverables 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 insulation gloves and
protective shoes.
6. Huawei shall not be liable for any consequence caused by violation of the storage,
transportation, installation, and operation regulations specified in this document and the user
manual.
Waterproof cable connector is abbreviated as connector in the following text.
NOTE
Ports
(1) PV connection indicator
(2) Grid-tied indicator
(3) Communication indicator
(4) Alarm/Maintenance indicator
(5) Maintenance compartment door
(6) Host panel
SUN2000 Front View
(1) Waterproof cable connector (AC OUTPUT 1)
(3) USB port (USB)
(5) DC switch 2 (DC SWITCH 2)
(7) DC input terminals (controlled by DC
SWITCH 1)
(2) Waterproof cable connector (AC OUTPUT 2)
(4) DC switch 1 (DC SWITCH 1)
(6) Waterproof cable connectors
(COM1/COM2/COM3)
(8) DC input terminals (controlled by DC
SWITCH 2)
Copyright ©Huawei Technologies Co.,Ltd.2019.All rightsreserved.

2
Chassis dimensions Mounting bracket dimensions
2Installation Requirements
Installation Angle
2.1
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 greater than or equal
to 600 mm and less than or equal
to 730 mm.
NOTE
Vertical Backward HorizontalUpside down Forward

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5. Install the SUN2000 on the mounting bracket. 6. Tighten the security torx screws using a
security torx wrench.
1. Remove the security torx wrench from the
mounting bracket and set it aside. 2. Mark hole positions.
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 SUN2000 is delivered with M12x40 screw assemblies. If the screw length does not meet
the installation requirements, prepare M12 screw assemblies by yourself and use them together
with the delivered M12 nuts.
•The following describes how to support-mount the SUN2000 as an example. For details about
how to wall-mount the SUN2000, see the SUN2000-(50KTL, 50KTL-C1) User Manual.
4. Secure the mounting bracket.3. Drill holes. (You are advised to apply anti-rust
paint on the hole positions for protection.)
M12
45 N·m
NOTE

4
Preparations
4.1
4Electrical Connections
No.
Name
Model or
Specifications
Quantity
Function
Description
1
OT terminal
M6
1 PCS
Connects to a
ground cable.
If you connect ground cables to
ground points on the chassis shell
or in the maintenance
compartment, use M6 OT
terminals.
2
OT terminal
M8
3 PCS
Connects to an
AC output
power cable.
N/A
3
Ground cable
Outdoor
copper
-core
cable
with a
cross
-
sectional
area of
16
mm2
N/A
Connects to a
ground cable.
•If you choose the ground point
on the chassis shell for
connecting a ground cable,
prepare the ground cable.
•If you choose the ground point
in the maintenance
compartment for connecting a
ground cable, use a four-
core
AC output power cable and do
not have to prepare a ground
cable.
4
AC output
power cable
Outdoor
copper
-core
cable with a
cross
-
sectional
area of 25 mm2
N/A
Connects to an
AC output
power cable.
If you choose the ground point in
the maintenance compartment for
connecting a ground cable, use a
four
-
core cable. Otherwise, use a
three
-core cable.
5
DC input power
cable
PV1
-F/4 mm2
N/A
Connects to a
DC input power
cable.
N/A
6
RS485
communications
cable
Computer
cable
DJYP2VP2
-
22
2x2x1
N/A
Connects to an
RS485
communications
cable over a
terminal block.
•
If RS485 communication is
used, prepare the RS485
communications cable.
•
A terminal block is
recommended for connecting
to the RS485 communications
cable.
Outdoor
shielded
network cable
CAT 5E
N/A
Connects to an
RS485
communications
cable
over an
RJ45
network
port.
7
Cable tie
N/A
Based on
site
requirements
Binds cables.
N/A
Before connecting cables, ensure that all required OT terminals and cables are prepared. Copper-
core cables with copper wiring terminals are recommended. For the requirements on the cables
and terminals made of other materials, see the SUN2000-(50KTL, 50KTL-C1) User Manual.

5
OT-M6
M6
5 N·m
Installing Ground Cables (Using the Ground Point on the Chassis Shell)
4.2
Installing AC Output Power Cables
4.3
•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."
1. The outdoor copper-core cable with a cross-sectional area of 16 mm2is recommended. The
ground cable must be secured.
2. It is recommended that ground 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.
3. To enhance the corrosion resistance of the ground terminal, apply silica gel or paint on it after
connecting the ground cable.
NOTE
•If you connect a ground cable to the ground point on the chassis shell, you are recommended 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
recommended to use a four-core outdoor copper-core cable with a cross-sectional area of 25
mm2as the AC output power cable.
•For more details about cable specifications, see the SUN2000-(50KTL, 50KTL-C1) User Manual.
•The AC OUTPUT 1 connector supports the cable with an outer diameter of 18 mm to 44 mm.
NOTE
1. Never open the host panel of the SUN2000.
2. Before opening the SUN2000 maintenance compartment door, turn off the downstream AC output
switch and the two bottom DC switches.
PE terminal

6
1. Remove the two security torx screws from the
maintenance compartment door using a security
torx wrench. (Set the two screws aside. Use the
idle ground screw on the chassis shell as the
standby screw, and the idle floating nut on the
chassis as the standby floating nut.)
2. Open the maintenance compartment door
and adjust the support bar. (The support bar
is bound to the chassis base.)
3. Remove the AC terminal cover.
4. Remove the locking cap from the AC OUTPUT 1 connector and then remove the plug.
5. 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.
•Mismatch between the cable outer diameter
and the rubber fitting may degrade the Ingress
Protection Rating of the device.
•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.

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7. Insert the exposed core wires into the crimping area of the OT terminal and crimp them using
hydraulic pliers.
8. Wrap the wire crimping area with heat shrink tubing or PVC insulation tape.
If heat shrink tubing is used, route the AC output power cable through the heat shrink tubing and
then crimp the OT terminal. Ensure that the area wrapped by the heat shrink tubing does not
exceed the crimping area of the OT terminal.
9. Route the AC output power cable through the AC OUTPUT 1 connector at the bottom of the
enclosure.
6. 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.)
a. Three-core cable (excluding the ground cable) b. Four-core cable (including the ground cable)
JacketInsulation layerCore wire
10.Connect the AC output power cable to the AC terminal block, and then secure the connector
using a 13 mm socket wrench with an extension rod. If you connect a ground cable to the
ground point in the maintenance compartment, tighten the ground screw using a 10 mm socket
wrench with an extension rod.
a. Three-core cable (excluding
the ground cable) b. Four-core cable (including the ground cable)
•Ensure that the AC output power cable is connected securely. Otherwise, the SUN2000 may fail
to operate or experience a fault that will damage the terminal block. For example, the SUN2000
may generate heat during operation due to unreliable connection.
•If the SUN2000 is insecurely installed and the AC output power cable bears the pulling force,
ensure that the last cable bearing the force is the PE cable.
11.Use a torque wrench with an open end of 65 mm to tighten the locking cap to a torque of 7.5 N·m,
and seal the waterproof connector.
M8
8 N·m
M6
5 N·m

8
Installing DC Input Power Cables
4.4
Selecting DC input terminals
Number of Inputs
SUN2000
1
Connects to any route.
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,
namely, DC SWITCH 1 and DC SWITCH 2.
DC SWITCH 1 controls the first to fourth
routes of DC input terminals, whereas DC
SWITCH 2 controls the fifth to eighth routes
of DC input terminals.
NOTE
•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 1100 V DC
using a multimeter and that the cables are connected correctly. Otherwise, the SUN2000 will be
damaged.
1. Use the positiveand negative metal contacts and DC connectors supplied withthe SUN2000. Using
other models of positive and negative metal contacts and DC connectors may result in serious
consequences. The caused device damage is not covered under any warranty or serviceagreement.
2. The metal contacts supplied with the DC connectors are either coldforming contacts orstamping
forming contacts. Crimp the metal cold forming contacts using crimping tool UTXTC0005 (Amphenol,
recommended) or H4TC0001 (Amphenol). Crimp the metalstamping forming contacts usingcrimping
tool H4TC0003 (Amphenol, recommended) orH4TC0002 (Amphenol). Choose the crimping tools that
fit the metal contacts.
3. 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.
4. Insert the crimped metal contacts of the positive and negative power cables into the appropriate
positive and negative connectors. Then pull back the DC input power cables to ensure that they
are connected securely.
5. Connect the positive and negative connectors to the appropriate positive and negative DC input
terminals. Then pull back the DC input power cables to ensure that they are connected securely.
6. If the DC input power cable is reversely connected, do not operate the DC switches and positive
and negative connectors immediately. Otherwise, the SUN2000 will be damaged. The caused
equipment damage is beyond the warranty scope. 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 correct the polarity of the DC input power cable.

9
Positive connector
Negative
connector
Positive metal contact
Negative metal contact
Recommended: PV cable
(PV1-F) with a cross-
sectional area of 4 mm2.
Ensure that the cable
cannot be removed after
crimped. Click
Ensure
that the
locking nut
is secured.
H4TW0001
(Amphenol)
UTXTC0005 (Amphenol)
Ensure that cables
are connected
correctly and that
the voltage does not
exceed 1100 V DC.
Installing a DC input power cable (using metal cold forming contacts)
Positive connector
Negative
connector
Positive metal contact
Negative metal contact
Recommended: PV cable
(PV1-F) with a cross-
sectional area of 4 mm2.
Ensure that the cable
cannot be removed after
crimped. Click
Ensure
that the
locking nut
is secured.
H4TW0001
(Amphenol)
H4TC0003 (Amphenol)
Ensure that cables
are connected
correctly and that
the voltage does not
exceed 1100 V DC.
Installing a DC input power cable (using metal stamping forming contacts)