Huawei SUN2000-200KTL-H2 User manual

HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-(196KTL-H0, 200KTL-H2, 215KTL-H0)
Quick Guide
Issue: 15
Part Number: 31500CPW
Date: 2022-05-10

1Copyright © Huawei Technologies Co., Ltd.
2022. All rights reserved.
•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.
•Only qualified and trained electrical technicians are allowed to operate the device. Operators
should understand the composition and working principles of the grid-tied PV power system
and local standards.
•Before installing the device, read the user manual carefully to get familiar with product
information and safety precautions. Huawei shall not be liable for any consequences caused
by the violation of the storage, transportation, installation, and operation regulations specified
in this document and the user manual.
•Use insulated tools when installing the device. For personal safety, wear proper personal
protective equipment (PPE).
1Product Overview
Front View
(1) PV connection indicator
(2) Grid-tied indicator
(3) Communication indicator
(4) Alarm/Maintenance
indicator
(5) Host panel cover
(6) Maintenance
compartment
Port Illustration (Manual DC Switch)
The DC switch of the current model can be manual or automatic.

2
(1)
DC input terminals (controlled by DC SWITCH 1)
(2) DC switch 1 (DC SWITCH 1)
(3) DC input terminals (controlled by DC SWITCH 2)
(4) DC switch 2 (DC SWITCH 2)
(5) DC input terminals (controlled by DC SWITCH 3)
(6) DC switch 3 (DC SWITCH 3)
(7) Ventilation valve
(8) USB port
(USB)
(9) Communications port (COM)
(10) Hole for the AC output power cable
(11) Hole for the tracking system power cable
Port Illustration (Automatic DC Switch)
(1)
DC input terminals (controlled by DC SWITCH 1
)
(2) DC switch 1 (DC SWITCH 1)
(3) Reset
button 1 (RESET 1)
(4) DC input terminals (controlled by DC
SWITCH 2)
(5)
DC switch 2 (DC SWITCH 2)
(6) Reset button 2
(RESET 2)
(7) DC input terminals (controlled by DC SWITCH 3)
(8) DC switch 3 (DC SWITCH 3)
(9) Reset button 3
(RESET 3)
(10)
Ventilation valve
(11)
USB port (USB)
(
12) Communications port (COM)
(
13) Hole for the AC output power cable
(
14) Hole for the tracking system power
cable
DC Switch Description
The DC switches automatically turn off when a fault occurs in the inverters (LED4 is steady red,
and the three DC switches are OFF). In this case, contact your technical support. Do not turn on
the DC switches by yourself.
Switch
Component
Description
DC SWITCH
ON
The DC switch is ON and can automatically turn off for protection.
The DC switch is ON but cannot automatically turn off for protection.
OFF
The DC switch is OFF.
RESET
•
When the DC switch automatically turns off for protection, the RESET button
will be released.
•When the RESET button is not pressed, the DC switch can only be turned to the
unloaded position , and cannot be set to the ON position.

3
2Installation Requirements
SUN2000 Dimensions
Mounting Bracket Dimensions
If inverters are installed in a place with abundant vegetation, in addition to routine weeding,
harden the ground underneath the inverters using cement or gravel (recommended area: 3 m x
2.5 m).

4
Installation Angle
2.1
Installation Space
2.2
•The M12x40 bolt assemblies are
delivered with the SUN2000 (bound to
the mounting bracket). If the bolt
assembly length does not meet the
installation requirements, prepare M12
bolt assemblies by yourself and use them
together with the delivered M12 nuts.
•Before installing the mounting bracket,
remove the security Torx wrench from
the mounting bracket and save it for
later use.
•This document introduces how to install
the SUN2000 on a support as an
example. For details about wall-mounted
installation, see the user manual.
3Installing the SUN2000
The clearance at the bottom must
meet the requirements on the
bending radius of the AC output
power cable.

5
1. Install the mounting bracket.
2. Unpack the inverter and move it to the specified position.
Handles are packed in a fitting bag and are not delivered with the SUN2000.

6
3. Adjust the installation positions of the handles, and install the SUN2000 on the mounting
bracket.

7
If outdoor copper-core cables are used, select copper wiring terminals. For details about the
requirements for cables and terminals of other materials, see the user manual.
4Installing Cables
Installation Preparations
4.1
No.
Item
Type
Specifications
Description
1
PE cable
Single
-core
outdoor copper
cable
Conductor cross
-
sectional area ≥
S/2[1]
(S
is the conductor cross
-
sectional area of the AC
output power cable.)
•
If you choose the
ground point on the
chassis shell for
connecting a PE
cable, prepare the PE
cable.
•
If you choose the
ground point in the
maintenance
compartment for
connecting a PE
cable, use a four-
core
AC output power
cable and do not
have to prepare a PE
cable.
2
AC output
power
cable
[2][3][4]
Outdoor copper
cable
•
Conductor cross-
sectional area: 50–
240 mm2
•Cable outer diameter:
24–66 mm (multi-
core); 14–32 mm
(single-core)
If you choose the ground
point in the maintenance
compartment for
connecting a PE cable,
use a four
-core cable.
Otherwise, use a three
-
core cable or three
single
-core cables.
Outdoor
aluminum
-core
cable
•
Conductor cross-
sectional area: 70–
240 mm2(multi-
core); 70–240 mm2
(single-core)
•Cable outer diameter:
24–66 mm (multi-
core); 14–32 mm
(single-core)
3
DC input
power cable
PV cable that
meets the 1500 V
standard
•
Conductor cross-
sectional area: 4–6
mm2
•Cable outer diameter:
4.7–6.4 mm
-

8
No.
Item
Type
Specifications
Description
4
RS485
communication
s cable
Outdoor shielded
twisted pair cable
•
Conductor cross-
sectional area: 0.25–
1
mm2
•Cable outer diameter:
4–11 mm
When three
communications cables
connect to the signal
cable connector, the
outer diameter of the
cables should be 4
–8
mm.
5
(Optional)
Power cable of
the tracking
system
Three
-
core outdoor
copper cable with
dual
-layer
protection
•
Conductor cross-
sectional area: 10
mm2
•Cable outer diameter:
15–18 mm
-
Note [1]: The value is valid only if the conductors of the PE cable and AC power cable use the
same material. If the materials are different, ensure that the conductor cross
-
sectional area of the
PE cable produces a conductance equivalent to that of the area S/2. The specifications of the PE
cable are subject to this table or calculated according to IEC 60364
-5-54.
Note [2]: You are advised to use a soft cable to prevent poor terminal contact due to the bending
stress of the cable
.
Note
[3]: For some models, the outer diameter of a single-core cable ranges from 14 mm to 36
mm based on the label in the maintenance compartment.
Note [4]: For some models, when the OT/DT terminal is crimped as shown in the following figure
and the rubber baffle plate of the AC wiring terminal is 112 mm, the maximum conductor cross
-
sectional area of the single
-core cable can be 400 mm2.
Specifications of the Crimped OT/DT Terminal
Specification of the Rubber Baffle Plate

9
Opening the Maintenance Compartment Door
4.3
•Do not open the host panel of the SUN2000.
•Before opening the SUN2000 maintenance compartment door, turn off the downstream AC
output switch and three DC switches at the bottom.
•Do not open the maintenance compartment door in rainy or snowy days. If you must, take
protective measures to prevent rain or snow from entering the maintenance compartment.
•Do not leave unused screws in the maintenance compartment.
1. Loosen the screws on the maintenance
compartment door.
2. Open the maintenance compartment door
and adjust the support bar.
Installing the PE Cable
4.2
•It is recommended that the PE cable
be connected to a nearby PE point.
Connect the PE points of all
SUN2000s in the same PV array to
ensure equipotential connections to
PE cables.
•To enhance the corrosion resistance
of a ground terminal, you are advised
to apply silica gel or paint on it after
connecting the PE cable.

Crimping
module
10
(Optional) Replacing the Crimping Module
4.4
3. Remove the crimping modules that are bound in the maintenance compartment and save
them properly for future use.
If the AC output power cable has a single core, replace the crimping module.
For some models, a three-hole rubber plug is bound in the maintenance compartment. After
removing the rubber plug, save it properly for future use.

11
(Optional) Installing the Solar Tracker Power Cable
4.6
1. A switch-disconnector-fuse or fuse-switch-disconnector with a voltage of no less than 800 V,
current of 16 A, and protection type of gM needs to be installed between the SUN2000 and
the tracker controller for protection.
2. The cable between the wiring terminal on the power cable and the switch-disconnector-fuse
or fuse-switch-disconnector should be less than or equal to 2.5 meters.
Removing the Rubber Rings from the Crimping Module
4.5
Use scissors to cut off the joints of the rubber rings to remove them. All rubber rings are
removed in the same way.
Installing AC Output Power Cables
4.7

12
Multi-core Cable (Four-Core Cable Is Used as an Example)
(five rings)
(four rings)
(three rings)
(two rings)
(one ring)
(six rings)
•Remove the corresponding rubber rings in strict accordance with the cable diameter, and ensure
that the crimping module is not damaged. Otherwise the protection level of the solar inverter
will be affected.
•Ensure that AC terminations provide firm and solid electrical connections. Failing to do so may
cause SUN2000 malfunction and damage to its terminal block, even starting 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.

13
Single-core Cable
(three rings)
(two rings)
(one ring)
(four rings)
The 32–36 mm cable is supported only
by some models. Refer to the
corresponding label to get the
supported size.
Bending Radius
Multi
-Core Cable
Single
-Core Cable
Unarmored
Armored
Unarmored
Armored
R
≥ 15D
R
≥ 12D
R
≥ 20D
R
≥ 15D
R indicates the bending radius, and D indicates the
outer diameter of the cable.
The AC power cable must be
routed vertically into the
maintenance compartment.
(five rings)

14
Closing the Maintenance Compartment Door
4.8
Installing DC Input Power Cables
4.9
Wiring Description of Y-branch Connectors
•Y-branch connectors can be purchased from Huawei or the manufacturers based on the
following recommended models: If the rated current of the fuse of the Y-branch connector is
15 A, the recommended model is 904095944 (Luxshare) or A040959443039 (Comlink); if
the rated current of the fuse of the Y-branch connector is 20 A, the recommended model is
904095945 (Luxshare) or A040959453039 (Comlink).
•When connecting cables to recommended Y-branch connectors, ensure that the connectors
to be paired match each other and are from the same manufacturer. Otherwise, the contact
resistance of the connectors may exceed the allowed value. In this case, the connectors may
be heated and oxidized, which may cause faults.
•Ensure that the locking nuts of all connectors are tightened.
•Do not bind more than three fuse enclosures together. Otherwise, the fuses and their
enclosures may be damaged due to overheating. It is recommended that a clearance of 10
mm or more be reserved between fuse enclosures. You are advised not to bind the fuse
enclosures with other heat emitting conductors.
Wiring rules:
1. The PV+ on the string side must be connected to the PV+ on the SUN2000 side, and the PV–
on the string side must be connected to the PV–on the SUN2000 side.
2. Preferentially and evenly connect the Y-branch connectors to the MPPTs controlled by DC
SWITCH 1 or DC SWITCH 2.

15
Number
of Y
-
branch
Connector
Sets
Recommended MPPT to Be
Connected
Number of
Y
-branch
Connector
Sets
Recommended MPPT to Be
Connected
1
MPPT1
2
MPPT1 and MPPT4
3
MPPT1, MPPT3 and MPPT4
4
MPPT1, MPPT3, MPPT4 and
MPPT6
5
MPPT1, MPPT2, MPPT3, MPPT4,
and MPPT5
6
MPPT1, MPPT2, MPPT3, MPPT4,
MPPT5, and MPPT6
7
MPPT1, MPPT2, MPPT3, MPPT4,
MPPT5, MPPT6, and MPPT7
8
MPPT1, MPPT2, MPPT3, MPPT4,
MPPT5, MPPT6, MPPT7, and
MPPT8
9
MPPT1, MPPT2, MPPT3, MPPT4,
MPPT5, MPPT6, MPPT7, MPPT8,
and MPPT9
N/A
N/A
Y-branch Connector Solution

16
•It is recommended that the Y-branch connectors be connected from the PV string side and
tied to the PV trackers.
•The DC input terminals of the solar inverter are prone to damage under stress. When Y-
branch connectors are connected to the solar inverter, bind and secure the connectors to
minimize stress on the DC input terminals.
•Do not place the Y-branch connector harness on the ground. A safe distance must be
reserved between the Y-branch connector harness and the ground to avoid impact caused by
water on the ground to the harness.
Scenario
Model of Y
-branch
Connector (Part A)
Connection Description
Connecting Y
-
branch connectors
to the PV strings
(recommended)
All models
Use the DC terminals delivered with the
SUN2000s
to connect part B to the
SUN2000s.
Connecting Y
-
branch connectors
to the
SUN2000
Models recommended
by Huawei
Part A can be directly connected to the
SUN2000,
and part B is not needed.
Other models
To ensure that the terminals of part A
match
the DC
terminals of the
SUN2000, part B is needed to
connect part A to the
SUN2000. Use the DC
terminals delivered with the
SUN2000 to connect
part B to the
SUN2000.
Recommended tying solution:

17
The SUN2000 has three DC switches (DC SWITCH 1, DC SWITCH 2, and DC SWITCH 3).
DC SWITCH 1 controls routes 1–6 of DC input terminals, DC SWITCH 2 routes 7–12, and DC
SWITCH 3 routes 13–18.
Select DC input terminals according to the following rules:
1. Evenly distribute the DC input power cables to the DC input terminals controlled by the three
DC switches. DC SWITCH 1 is preferred.
2. Maximize the number of connected MPPT circuits.
Ensure that the PV module output is well insulated to ground.
Selecting DC Input Terminals
1. Use the MC4 EVO2 PV connectors delivered with the SUN2000. If the PV connectors are lost
or damaged, purchase the connectors of the same model. The device damage caused by
incompatible PV connectors is beyond the warranty scope.
2. 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.
3. Measure the voltage at the DC input end using a multimeter. If the voltage is a negative
value, the DC input polarity is incorrect. Correct the polarity. If the voltage is greater than
1500 V, too many PV modules are configured to the same string. Remove some PV modules.
4. 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 three DC switches and remove the positive and negative
connectors. Correct the string polarity before reconnecting the string to the SUN2000.
5. For models of the crimping tool and removal wrench, use the recommended model or
contact your Staubli dealer.
6. Connect the PV string connector to the inverter connector, and then pull back the PV string
connector along the axial direction to check whether the connectors are securely connected.
7. The connector must be securely connected. Damages caused by improper connection are not
covered under the warranty.

18
Installing a DC Input Power Cable
13001462
(STAUBLI)
Click
PV-CZM-41100
(STAUBLI)
Positive metal contact
Negative metal contact
Use a multimeter
to measure the
DC voltage. (DC
voltage: ≤ 1500 V)
Ensure that the cable
cannot be removed
after crimped.
Click
Positive connector
Negative
connector
Ensure that
the locking
nut is
secured.
Connector connection:
Communication Port Pin Definition
Installing the RS485 Communications Cable
4.10
When routing communications cables,
separate communications cables from
power cables to prevent communication
from being affected.

19
Connecting Communications Cables (4–8 mm Four-Hole Rubber Plug)
When using the four-hole rubber plug, block the unused cable hole with a plug, and then
tighten the locking cap.
Port
Pin
Definition
Pin
Definition
Description
RS485
-1
1
RS485A IN,
RS485
differential signal+
2
RS485A OUT,
RS485
differential signal+
Used for cascading
inverters or connecting to
devices such as the
SmartLogger.
3
RS485B, RS485
differential signal
–
4
RS485B, RS485
differential signal
–
PE
5
PE, shielding ground
6
PE, shielding ground
-
RS485
-2
7
RS485A, RS485
differential signal+
8
RS485B, RS485
differential signal
–
Used for connecting to
RS485 slave devices.