Huawei SUN2000-111KTL-NHM0 User manual

HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-111KTL-NHM0 (large current)
Quick Guide
Issue: 01
Part Number: 31500HWT
Date: 2023-03-30

1
1Overview
Copyright © Huawei Technologies Co., Ltd. 2023.
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 certified electricians are allowed to operate the device. Operation personnel should
understand the composition and working principles of the grid-tied PV power system and local
regulations.
•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).
Front View
(1) PV connection indicator
(2) Grid connection
indicator
(3) Communication
indicator
(4) Alarm/Maintenance
indicator
(5) Host panel cover
(6) Maintenance
compartment
Port Illustration
(1) Spot
-check terminal connection box
(2) DC input terminal group 1 (PV1
–PV8, controlled
by DC SWITCH 1)
(3) (Optional) Screw hole for DC switch 1
(4) DC switch 1 (DC SWITCH 1)
(5) Reset button 1
(RESET 1)
(6) DC input terminal group 2 (PV9
–
PV14, controlled
by DC SWITCH 2)

2
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.
(7) (Optional) Screw hole for DC switch 2
(8) DC switch 2 (DC SWITCH 2)
(9) Reset button 2
(RESET 2)
(10) DC input terminal group 3 (PV15
–PV20,
controlled by DC SWITCH 3)
(11) (Optional) Screw hole for DC switch 3
(12) DC switch 3 (DC SWITCH 3)
(13) Reset button 3
(RESET 3)
(14) Ventilation valve
(15) USB port (USB)
(16) Communications port (COM)
(17) Hole for the AC output power cable
(18) Hole for the tracking system power cable
SUN2000 Dimensions
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
Mounting Bracket Dimensions
Installation Angle
2.1
2Installation Requirements
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
3Installing a Solar Inverter
•This quick guide describes how to install a solar
inverter on a support. For details about wall-
mounted installation, see the user manual.
•The M12x40 bolt assemblies are delivered with the
solar inverter. 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 and set it aside.
Position for binding the
security Torx wrench
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.
Use the handles
to facilitate
installation.
Handles are
optional and
delivered
separately.
Ensure that the
handles are
securely
installed. After
the installation
is complete,
remove the
handles and set
them aside.
Installation Positions of
Handles During Installation
Installation Positions of
Handles During Transportation

5
1. Install the mounting bracket.
It is recommended that anti-rust measures be taken on the positions for drilling holes.
2. Install the solar inverter onto the mounting bracket. 3. Tighten security Torx screws.

6
No.
Cable
Type
Conductor
Cross-
Sectional Area
Outer Diameter
1
PE
cable[1]
Outdoor cable and M10 OT/DT
terminals
S
p≥ S/2
N/A
2
Tracking system
power cable
Three
-
core outdoor copper cable
with dual
-layer protection
10 mm
2
15
–18 mm
3
AC output
power cable
(multi
-core)
•
If you connect a ground cable
to the ground point on the
chassis shell, you are advised to
use a three-core (U, V, and W
)
outdoor cable and M12 OT/DT
terminals (U, V, and W).
•
If you connect a ground cable
to the ground point in the
maintenance compartment,
you do not need to prepare a
PE cable but are advised to use
a four-core (U, V, W, and PE)
outdoor cable, M12 OT/DT
terminals (U, V, and W), and
M10 OT/DT terminals (PE).
•
Copper cable
−S: 70–240 mm2
−Sp≥ S/2
•
Aluminum alloy
cable or copper-
clad aluminum
cable:
−S: 95–240 mm2
−Sp≥ S/2
24
–66 mm
Preparations
4.1
•S and Spare the conductor cross-sectional areas of AC power cables and PE cables
respectively.
•The cable diameter must comply with local cable standards.
•The factors that affect cable selection include the rated current, cable type, routing mode,
ambient temperature, and maximum expected line loss.
4Connecting Cables
•Connect cables in accordance with the local installation laws and regulations.
•To prevent poor cable connection due to overstress, leave enough slack before connecting the
cables to the appropriate ports.
•To ensure that the inverter can be safely disconnected from the power grid when an
exception occurs, connect an AC switch to the AC side of the inverter. Select an appropriate
AC switch in accordance with local industry standards and regulations.
•Do not connect loads between the inverter and the AC switch that directly connects to the
inverter. Otherwise, the switch may trip by mistake.
•If an AC switch is used with specifications beyond local standards, regulations, or the
Company's recommendations, the switch may fail to turn off in a timely manner in case of
exceptions, causing serious faults.
Each inverter must be equipped with an AC output switch. Multiple inverters cannot connect to
the same AC output switch.

7
Installing a PE Cable
4.2
•It is recommended that the
PE cable of the solar inverter
be connected to a nearby
ground point. Connect the PE
points of all solar inverters in
the same 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.
Opening the Maintenance Compartment Door
4.3
•Do not open the panel of the solar inverter.
•Before opening the 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 have to, take
protective measures to prevent rain or snow from entering the maintenance compartment.
•Do not leave unused screws in the maintenance compartment.
Reserved PE point
No.
Cable
Type
Conductor
Cross-
Sectional Area
Outer Diameter
3
AC output
power cable
(single
-core)[2]
You are advised to use a single
-
core
outdoor cable and M12
OT/DT terminals.
•
Copper cable
−S: 70–240 mm2
•
Aluminum alloy
cable or copper-
clad aluminum
cable:
−S: 95–240 mm2
14
–32 mm
4
DC input power
cable
PV cable that meets the 1100 V
standard
4
-6 mm2,12-10
AWG
5.9
-8.8 mm
5
RS485
communications
cable
Outdoor shielded twisted pair
that meets the local standard
0.25
–1 mm2
•
One or two
communications
cables: 4–11 mm
•
Three
communications
cables: 4–8 mm
Note
[1]: The value of Sp
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 of the PE cable with a
proper cross
-
sectional area produces a conductance equivalent to that of the cable specified in the
table. The
specifications of the PE cable are subject to this table or calculated according to IEC
60364
-5-54.
Note
[2]: 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.

8
3. Remove the accessories and set them aside.
Removing the Rubber Rings from the Crimping Module
4.4
Use scissors to cut off the joints of the rubber rings to remove them. All rubber rings are
removed in the same way.
Remove the corresponding rubber rings strictly according to the cable diameter range, and
ensure that the crimping module is not damaged. Otherwise, the protection level of the solar
inverter will be affected.
1. Loosen the screws on the
maintenance compartment door.
2. Open the maintenance compartment door and
adjust the support bar.

9
(Optional) Installing the Tracking System Power Cable
4.5
•A switch-disconnector-fuse or fuse-switch-disconnector with a voltage of no less than 500 V,
current of 16 A, and protection type of gG needs to be installed between the SUN2000 and
the tracker controller for protection.
•The tracking system should be equipped with an overcurrent protective device or component.
The length of the cable between the power cable terminal and the overcurrent protection
device or component must be less than or equal to 2.5 m.
•The power supply of the tracking system should be an AC three-phase power grid.
•Keep inflammable materials away from the power cable.
•The power cable must be protected with a conduit to prevent short circuits caused by
insulation layer damage.
Installing the AC Output Power Cable
4.6
•The cable outer diameter can be measured using the ruler sticker in the maintenance
compartment.
•Ensure that the AC output power cable is secured. Failure to do so may cause the solar inverter
to malfunction or damage to its terminal block by issues such as overheating.
•Sufficient slack should be provided in the PE cable to ensure that the last cable bearing the
force is the PE cable when the AC output power cable bears pulling force due to force majeure.
•If a screw on the maintenance compartment door is lost, obtain the spare screw from the fitting
bag tied at the bottom of the maintenance compartment.