Huawei SUN2000-90KTL User manual

HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-(90KTL, 95KTL, 100KTL, 105KTL) Series
Quick Guide
Issue: 08
Part Number: 31509903
Date: 2020-03-15

1Copyright © Huawei Technologies Co., Ltd.
2020. All rights reserved.
1Overview
•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).
(1) Maintenance compartment door
(2) LED indicators
(3) Host panel
(4) Mounting bracket
(5) Heat sink
(6) Communications cable glands
(COM1/COM2/COM3)
(7) USB port (USB)
(8) Auxiliary handles
(9) DC input terminals (+/
–; controlled by DC
SWITCH 1)
(10) DC input terminals (+/
–; controlled by DC
SWITCH 2)
(11) AC output cable gland (AC OUTPUT)
(12) Reserved cable gland (RESERVE)
(13) DC switch 1 (DC SWITCH1)
(14) DC switch 2 (DC SWITCH 2)

2
Recommended: 600 mm ≤ bottom space ≤ 730 mm
2Installation Requirements
Dimensions
Angle Space
3Installing the SUN2000
•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.
Position for bundling a
security Torx wrench

3
1. Install the mounting bracket.
3. Install the SUN2000 on the mounting
bracket. 4. Tighten security Torx screws.
You are advised to apply anti-rust paint
on the hole positions for protection.
2. For the SUN2000-90KTL-H2 used in Australia, install the delivered screw for locking each DC
switch.

4
No.
Cable
Type
Recommended
Conductor
Cross
-
Sectional Area
Outer
Diameter
1
PE cable
Outdoor copper cable and M8
OT/DT terminals
≥ 16 mm
2
N/A
2
(Optional) Tracking
system power cable
Three
-
core outdoor copper cable
with dual
-layer protection
6 mm
2
14
–18 mm
3
AC output power cable
•
If you connect a PE cable to
the PE point on the enclosure,
you are advised to use a
three-core (L1, L2, and L3)
outdoor copper cable and
M10 OT/DT terminals (L1, L2,
and L3).
•
If you connect a PE cable to
the PE point in the
maintenance compartment,
you do not need to prepare a
PE cable separately but are
advised to use a four-core
(L1, L2, L3, and PE) outdoor
copper cable, M10 OT/DT
terminals (L1, L2, and L3),
and M8 OT/DT terminals (PE).
•
L1, L2, L3:
35 mm2
•
PE: ≥ 16
mm2
24
–57 mm
4
DC input
power
cable
Amphenol
UTX PV
Connectors
PV cable that meets the 1500 V
standard
4
–6 mm2
4.5
–7.8 mm
MC4 EVO2
PV
Connectors
4
–6 mm2
4.7
–6.4 mm
5
RS485 communications
cable (connected to a
terminal block;
recommended)
Multi
-paired, individually foil
shielded cable that complies with
local standards and M6 OT
terminals
1
mm2
14
–18 mm
RS485 communications
cable (connected to a
network port)
CAT 5E outdoor shielded
network cable with internal
resistance ≤ 1.5 ohms/10 m, as
well as the shielded RJ45
connector
N/A
7
–9 mm
Preparing Cables
4.1
4Electrical Connections
Connect cables in accordance with the local installation laws and regulations.

5
Reserved PE point
Installing the PE Cable (on the Enclosure)
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.
1. Loosen the screws on the maintenance
compartment door.
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 two 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.
2. Open the maintenance compartment door
and adjust the support bar.
3. Remove the cover and hang it on the hook of the enclosure door.

6
Installing the AC Output Power Cable
4.4
•This document introduces how to install the four-core AC output power cable, which can be a
reference for installing the three-core cable. The three-core cable does not need a PE cable
installed in the maintenance compartment.
•To avoid damaging the rubber liner, do not route a cable with a crimped OT/DT terminal directly
through it.
•Do not adjust the cable when the sealing nut is tightened. Otherwise, the rubber liner will shift,
which affects the IP rating of the device.
•Ensure that AC terminations are secured. Failing to do so may cause the SUN2000 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.
After the AC output power cable is installed, seal the cable gland.

7
Number of
PV Strings
Terminal Selection
Number of
PV Strings
Terminal Selection
6
Connects to routes 2, 4, 6, 8, 10,
and 12.
7
Connects to routes 2, 4, 6, 8, 9, 10,
and 12.
8
Connects to routes 1, 2, 4, 6, 8, 9,
10, and 12.
9
Connects to routes 1, 2, 4, 6, 7, 8, 9,
10, and 12.
10
Connects to routes 1, 2, 4, 6, 7, 8, 9,
10, 11, and 12.
11
Connects to routes 1, 2, 3, 4, 6, 7, 8,
9, 10, 11, and 12.
For example, if the number of input routes is 6–11, the recommended DC input terminals are as
follows:
1. Use the positive and negative metal contacts and DC connectors delivered with the SUN2000.
Using other positive and negative metal contacts and DC connectors may result in serious
consequences. The caused device damage is not covered under any warranty.
2. Before connecting the DC input power cable, label the cable polarities to ensure correct cable
connections. Otherwise, the SUN2000 may be damaged.
3. Measure the voltage at the DC input end using a multimeter. If the voltage is a negative value,
the DC input polarity is incorrect. Correct the polarity. If the voltage is greater than 1500 V, too
many PV modules are configured to the same string. Remove some PV modules.
4. If the DC input power cable is reversely connected and the DC switch is turned on, do not
perform operations on the DC switch or the positive/negative connectors immediately. Otherwise,
the device may be damaged. The caused device damage is not covered under any warranty.
Wait until the night when solar irradiance declines and the PV string current drops to below 0.5 A.
Then turn the two DC switches to the OFF position, remove the positive and negative DC input
power connectors, and correct the polarity of the DC input power cable.
•Ensure that the PV module output is well insulated to ground.
•Before inserting the positive and negative connectors respectively into the positive and negative
DC input terminals of the SUN2000, ensure that the DC voltage does not exceed 1500 V DC using
a multimeter and that the cable polarities are correct. Otherwise, the SUN2000 will be damaged.
Installing the DC Input Power Cable
4.5
The SUN2000 provides 12 DC
input terminals, which are
controlled by its two DC switches.
DC SWITCH 1 controls DC input
terminals 1–6 (MPPT1–3) and DC
SWITCH 2 controls DC input
terminals 7–12 (MPPT4–6).
When DC inputs are not fully configured, the input terminals should meet the following requirements:
1. Evenly distribute DC input power cables on the DC input terminals controlled by the two DC
switches.
2. Maximize the number of connected MPPT circuits.

8
Positive connector
Negative
connector
Positive metal contact
Negative metal contact Ensure that the cable
cannot be pulled out after
being crimped.
UTXTC0003
(Amphenol)
Click
Ensure that the
locking nut is
secured.
UTXTWA001
(Amphenol)
Click
DC voltage
measurement range
≥ 1500 V DC
Amphenol UTX PV Connectors
Crimp the metal contacts using crimping tool UTXTC0003 (Amphenol, recommended) or
UTXTC0002 (Amphenol).
MC4 EVO2 PV Connectors
13001462
(STAUBLI)
32.6020-22100-HZ
(STAUBLI)
Positive connector
Negative
connector
Positive metal contact
Negative metal contact Ensure that the cable
cannot be pulled out after
being crimped.
Click
Ensure that
the locking
nut is
secured.
Click
DC voltage
measurement
range ≥ 1500 V DC

9
Installing the RS485 Communications Cable
4.6
1. When routing the communications cable, separate it from power cables and connect the shield
layer to the ground point to prevent communication from being affected.
2. The RS485 communications cable can connect to a terminal block or an RJ45 network port.
Select one in actual installation.
Connecting to a Terminal Block (Recommended)
No.
Definition
Description
No.
Definition
Description
1
RS485A IN
RS485A, RS485
differential signal+
2
RS485A OUT
RS485A, RS485
differential signal+
3
RS485B IN
RS485B, RS485
differential signal
–
4
RS485B OUT
RS485B, RS485
differential signal
–
After the RS485 communications cable is installed, seal the cable gland.