Huawei SUN2000-185KTL-INH0 User manual

HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-(175KTL-H0, 185KTL-INH0, 185KTL-H1)
Quick Guide
Issue: 14
Part Number: 31500BWE
Date: 2022-01-20

1
Port Illustration (Manual DC Switch)
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 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 connection indicator
(3) Communication indicator
(4) Alarm/Maintenance
indicator
(5) Host panel cover
(6) Maintenance
compartment
•The DC switch of the current model can be manual or automatic.
•DC switch locking screws are delivered only for models used in Australia.

2
Port Illustration (Automatic DC Switch)
(1)
DC input terminals (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 terminals (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 terminals (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
(1
) DC input terminals (controlled by DC SWITCH 1)
(2) (Optional)
Screw hole for DC switch 1
(3
) DC switch 1 (DC SWITCH 1)
(4
) DC input terminals (controlled by DC
SWITCH 2)
(5
) (Optional) Screw hole for DC switch 2
(6
) DC switch 2 (DC SWITCH 2)
(7
) DC input terminals (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 (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.

3
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.
SUN2000 Dimensions
Mounting Bracket Dimensions

4
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).
Installation Space
2.2
The clearance at the bottom must
meet the requirements on the
bending radius of the AC output
power cable.

5
3Installing the SUN2000
1. Install the mounting bracket.
•The M12x40 bolt assemblies are
delivered with the SUN2000. 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.
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. (Optional) Install screws for locking DC switches.
For the model used in Australia, perform this step to meet the local standards.
4. 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
a(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
cablebcd
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
-
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.

8
No.
Item
Type
Specifications
Description
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 a: 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
b: You are advised to use a soft cable to prevent poor terminal contact due to the bending
stress of the cable
.
Note c: 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 d: 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
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.
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.