Huawei SUN2000-75KTL-M1 User manual

HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-(75KTL-M1, 100KTL-M2, 110KTL -M2,
115KTL -M2)
Quick Guide
Issue: 01
Part Number: 31500JFK
Date: 2023-04-30

1
1Overview
Copyright © Huawei Technologies Co., Ltd. 2023.
All rights reserved.
•Before installing the equipment, read the user manual carefully to get familiar with product
information and safety precautions. The product warranty does not cover equipment damage
caused by failure to follow the storage, transportation, installation, and usage guidelines
specified in this document and the user manual. Log in to the technical support website
(https://support.huawei.com/enterprise) to view the user manual and safety precautions.
•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.
•The Danger, Warning, Caution, and Notice statements described in this document do not cover all
the safety precautions. You also need to comply with relevant international, national, or regional
standards and industry practices.
•Only qualified professionals or trained personnel are allowed to perform operations on the
equipment. Operation personnel should understand the system, its working principles, and relevant
national/regional standards.
•During operations, use dedicated insulated tools and wear personal protective equipment, such as
protective clothing, insulated shoes, goggles, safety helmets, and insulated gloves.
(1)
Panel
(2) LED indicators
(3) Maintenance compartment door
(4) Mounting bracket
(5) External fan tray
Appearance
Port Description
(1) DC input terminal group 1 (PV1
–PV8,
controlled by DC SWITCH 1)
(2) DC switch 1 (DC SWITCH 1)

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.
2Installation Requirements
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.
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).
600–730 mm of clearance is recommended underneath.
Angle Clearance
(5) DC switch 2 (DC SWITCH 2)
(6) Reset button 2
(RESET 2)
(7) DC input terminal group 3 (PV15
–PV20,
controlled by DC SWITCH 3)
(8) DC switch 3
(DC SWITCH 3)
(9) Reset button 3
(RESET 3)
(10) Ventilation valve
(11) USB port
(12) Communications port (COM)
(13) Hole for the AC output power cable
(14) Hole for the tracking system power cable

3
Dimensions
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
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

4
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.
4Connecting Cables
•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.
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.

5
No.
Cable
Type
Conductor Cross
-
Sectional Area
Outer Diameter
1
PE cable
[1]
Outdoor cable and M10 OT/DT
terminal
s
S
p≥ S/2
–
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 device enclosure
and the neutral wire is not used, you
are advised to use a three-core (L1,
L2, and L3) outdoor cable and M12
OT/DT terminals (L1, L2, and L3).
•
If you connect a ground cable to the
ground point in the maintenance
compartment and the neutral wire is
not used, you are advised to use a
four-
core (L1, L2, L3, and PE) outdoor
cable, M12 OT/DT terminals (L1, L2,
and L3), and M10 OT/DT terminals
(PE).
•
If you connect a ground cable to the
ground point on the device
enclosure
and the neutral wire is used, you are
advised to use a four-
core (L1, L2, L3,
and N) outdoor cable and M12 OT/DT
terminals (L1, L2, L3, and N).
•
If you connect a ground cable to the
ground point in the maintenance
compartment and the neutral wire is
used, you are advised to use a five-
core (L1, L2, L3, N, and PE) outdoor
cable, M12 OT/DT terminals (L1, L2,
L3, and N), and M10 OT/DT terminals
(PE).
•
Copper cable
−S: 70–240 mm
2
−Sp≥ S/2
•Aluminum alloy
cable or copper-
clad aluminum
cable:
−S: 95–240 mm
2
−Sp≥ S/2
24
–66 mm
AC output
power cable
(single
-core)
You are advised to use a single
-core
outdoor cable and M12 OT/DT
terminals.
•
Copper cable
−S: 70–240 mm
2
•Aluminum alloy
cable or copper-
clad aluminum
cable:
−S: 95–240 mm
2
14
–32 mm
Cable Description
Preparations
4.1
•S and Spare the conductor cross-sectional areas of AC power cables and PE cables respectively.
•The cable size 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.
•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.

6
No.
Cable
Type
Conductor Cross
-
Sectional Area
Outer Diameter
4
DC input power
cable
PV cable that meets the 1100 V
standard
4
–6 mm2
5.5
–9 mm
5
RS485
communications
cable
Outdoor shielded twisted pair
that
meets the local standard
0.25
–1 mm2
•
One or two
communicatio
ns cables: 4–
11 mm
•
Three
communicatio
ns cables: 4–
8
mm
Note
[1]: The value of Spis 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.
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.
Reserved PE point

7
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 on rainy or snowy days. If you need to, 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.

8
4. Select a crimping module according to the type of the AC output power cable.
3. Remove the accessories and set them aside.
Multi-core Cable
Single-core Cable

9
(Optional) Installing the Tracking System Power Cable
4.5
•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 flammable materials away from the power cable.
•The power cable must be protected with a conduit to prevent short circuits caused by
insulation layer damage.
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.