Huawei SUN2000-75KTL Series User manual

HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
Quick Guide
Issue: 19
Part Number: 31500HGH
Date: 2022-05-20

1
1Overview
Copyright © 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 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).
(1)
Panel
(2) LED indicators
(3) Maintenance compartment door
(4) Mounting bracket
(5) External fan tray
Front View
The DC switch of the current model can be manual or automatic.
Port Description (Manual DC Switch)

2
(1) DC input terminal group 1 (PV1
–PV8,
controlled by DC SWITCH 1)
(2) (Optional) Screw hole for DC switch 1
(3) DC switch 1 (DC SWITCH 1)
(4) DC input terminal group 2 (PV9
–PV14,
controlled by DC SWITCH 2)
(5) (Optional) Screw hole for DC switch 2
(6) DC switch 2 (DC SWITCH 2)
(7) DC input terminal group 3 (PV15
–PV20,
controlled by DC SWITCH 3)
(8) (Optional) Screw hole for DC switch 3
(9) DC switch 3 (DC SWITCH 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
(1) DC input terminal group 1 (PV1
–PV8,
controlled by DC SWITCH 1)
(2) (Optional) Screw hole for DC switch 1
(3) DC switch 1 (DC SWITCH 1)
(4) Reset button 1
(RESET 1)
(5) DC input terminal group 2 (PV9
–PV14,
controlled by DC SWITCH 2)
(6) (Optional) Screw hole for DC switch 2
(7) DC switch 2 (DC SWITCH 2)
(8) Reset button 2
(RESET 2)
(9) DC input terminal group 3 (PV15
–PV20,
controlled by DC SWITCH 3)
(10) (Optional) Screw hole for DC switch 3
(11) DC switch 3 (DC SWITCH 3)
(12) Reset button 3
(RESET 3)
(13) Ventilation valve
(14) USB port
(15) Communications port (COM)
(16) Hole for the AC output power cable
(17) Hole for the tracking system power cable
Port Description (Automatic DC Switch)
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.

3
2Installation Requirements
Recommended: 600 mm ≤ Bottom space ≤ 730 mm
Angle Space
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.
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
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
1. Install the mounting bracket.
It is recommended that anti-rust measures be taken on the positions for drilling holes.
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

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3. Install the solar inverter onto the mounting bracket. 4. Tighten security Torx screws.
2. (Optional) Install screws for locking DC switches.
•According to Australian standards, the screws for DC switches are delivered with solar
inverters. The screws are used to secure DC switches (DC SWITCH 1, DC SWITCH 2, and DC
SWITCH 3) to prevent them from being turned on by mistake.
•For the model used in Australia, perform this step to meet the local standards.

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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 (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, you do
not need to prepare a PE cable but
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).
•
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
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
5.5
–9 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.
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.
3-pin Model (125KTL) Cable Description
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.

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4-pin Model (75KTL/100KTL/110KTL) Cable Description
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
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
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 chassis shell
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
mm2
−Sp≥ S/2
•Aluminum alloy
cable or copper
-
clad aluminum
cable:
−S: 95–240
mm2
−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
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
5.5
–9 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.

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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.
1. Loosen the screws on the
maintenance compartment door.
2. Open the maintenance compartment door and
adjust the support bar.
Reserved PE point

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