Huawei SUN2000-125KTL-JPH0 User manual

HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-125KTL-JPH0
Quick Guide
Issue: 08
Part Number: 31500ECT
Date: 2021-09-30

1Copyright © Huawei Technologies Co., Ltd.
2021. 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
Port Illustration (Manual DC Switch)
The DC switch of the current model can be manual or automatic.

2
(1
) Spot-check terminal connection box
(2
) DC input terminals (controlled by DC SWITCH 1)
(3
) DC switch 1 (DC SWITCH 1)
(4
) DC input terminals (controlled by DC SWITCH 2)
(5
) DC switch 2 (DC SWITCH 2)
(6
) DC input terminals (controlled by DC SWITCH 3)
(7
) DC switch 3 (DC SWITCH 3)
(8
) Ventilation valve
(9
) USB port (USB)
(10
) Communications port (COM)
(11
)
Hole for the AC output power cable
(12) Hole for the tracking system power cable
Port Illustration (Automatic DC Switch)
The DC switch can be automatically disconnected when an internal fault is detected in an inverter.
(1) Spot
-check terminal connection box
(2) DC input terminals (controlled by DC SWITCH 1)
(3) DC switch 1
[1] (DC SWITCH 1)
(4) Reset button 1
(RESET 1)
(5) DC input terminals (controlled by DC
SWITCH 2)
(6) DC switch 2
[1] (DC SWITCH 2)
(7) Reset button 2
(RESET 2)
(8) DC input terminals (controlled by DC SWITCH 3)
(9) DC switch 3
[1] (DC SWITCH 3)
(10) Reset button 3
(RESET 3)
(11) Ventilation valve
(12) USB port (USB)
(13) Communications port (COM)
(14) Hole for the AC output power cable
(15) Hole for the tracking system power
cable
Note [1]: If the DC switch rotating handle is at the position , the DC switch is not
completely closed and may not be automatically switched off.

3
Installation Angle
2.1
2Installation Requirements
SUN2000 Dimensions
Mounting Bracket Dimensions

4
3Installing the SUN2000
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.
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.

5
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.
3. Adjust the installation positions of the handles, and install the SUN2000 on the mounting
bracket.

6
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]
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
-

7
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.
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.

8
1. Loosen the screws on the maintenance
compartment door.
2. Open the maintenance compartment door
and adjust the support bar.
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.

9
(Optional) Replacing the Crimping Module
4.4
If the AC output power cable has a single core, replace the crimping module.
Crimping
module
3. Remove the crimping modules that are bound in the maintenance compartment and save
them properly for future use.
A three-hole rubber plug is bound in the maintenance compartment. After removing the rubber
plug, save it properly for future use.