Huawei SUN2000-196KTL-H0 User manual

HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-196KTL-H0
Quick Guide
Issue: 02
Part Number: 31500DDB
Date: 2020-05-15

1
Port Description
Copyright © Huawei Technologies Co., Ltd.
2020. 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-tied indicator
(3) Communication indicator
(4) Alarm/Maintenance
indicator
(5) Host panel cover
(6) Maintenance
compartment
(1)
DC input terminals (controlled by DC SWITCH 1)
(2)
DC switch 1 (DC SWITCH 1)
(3)
DC input terminals (controlled by DC SWITCH 2)
(4)
DC switch 2 (DC SWITCH 2)
(5)
DC input terminals (controlled by DC SWITCH 3)
(6)
DC switch 3 (DC SWITCH 3)
(7) Ventilation valve
(8)
USB port (USB)
(9) Communications port (COM)
(10) Hole for the AC output power cable
(11) Hole for the tracking system power cable

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

3
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.
Position for saving a
security torx
wrench
•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.
1. Install the mounting bracket.

4
3. Adjust the installation positions of the handles, and install the SUN2000 on the mounting
bracket.
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.

5
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 cable
b
Outdoor copper
cable
•
Conductor cross-
sectional area: 50–
240 mm2
•Cable outer diameter:
24–66 mm (multi-
core); 14–35 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); 14–35 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
-

6
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 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
. 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.
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.

7
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.

Crimping
module
8
(Optional) Replacing the Crimping Module
4.4
3. Remove the crimping modules that are bound in the maintenance compartment and save them
properly for future use.
If the AC output power cable has a single core, replace the crimping module.
For some models, a three-hole rubber plug is bound in the maintenance compartment. After
removing the rubber plug, save it properly for future use

9
(Optional) Installing the Solar Tracker Power Cable
4.6
1. A switch-disconnector-fuse or fuse-switch-disconnector with a voltage of no less than 800 V,
current of 16 A, and protection type of gM needs to be installed between the SUN2000 and the
tracker controller for protection.
2. The cable between the wiring terminal on the power cable and the switch-disconnector-fuse or
fuse-switch-disconnector should be less than or equal to 2.5 meters.
Removing the Rubber Rings from the Crimping Module
4.5
Use scissors to cut off the joints of the rubber rings to remove them. All rubber rings are removed in
the same way.

10
Multi-core Cable (Four-Core Cable Is Used as an Example)
Installing AC Output Power Cables
4.7
(five rings)
(four rings)
(three rings)
(two rings)
(one ring)
(six rings)
•Remove the corresponding rubber rings in strict accordance with the cable diameter, and ensure
that the crimping module is not damaged. Otherwise the protection level of the solar inverter will
be affected.
•Ensure that AC terminations provide firm and solid electrical connections. Failing to do so may
cause SUN2000 malfunction and damage to its terminal block, even starting thermal events.
•If the AC output power cables are subject to a pulling force because the inverter is not installed
stably, ensure that the last cable that bears the stress is the PE cable.

11
Single-core Cable
(three rings)
(two rings)
(one ring)
(four rings)

12
Closing the Maintenance Compartment Door
4.8
Installing DC Input Power Cables
4.9
Wiring Description of Y-branch Connectors
•Y-branch connectors can be purchased from Huawei or the manufacturers based on the
following recommended models: If the rated current of the fuse of the Y-branch connector is 15
A, the recommended model is 904095944 (Luxshare) or A040959443039 (Comlink); if the
rated current of the fuse of the Y-branch connector is 20 A, the recommended model is
904095945 (Luxshare) or A040959453039 (Comlink).
•Do not use Y-branch connectors that are not recommended.
•When connecting cables to recommended Y-branch connectors, ensure that the connectors to
be paired match each other and are from the same manufacturer. Otherwise, the contact
resistance of the connectors may exceed the allowed value. In this case, the connectors may
be heated and oxidized, which may cause faults.
•When the Y-branch connector is used with the MC4 EVO2 contacts, you are advised to use the
32.6020-22100-HZ (Staubli) crimping tool. You can also use the PV-CZM-22100 (Staubli)
crimping tool. When choosing PV-CZM-22100 (Staubli), do not use the locator. Otherwise, the
metal contacts would be damaged.
•Ensure that the locking nuts of all connectors are tightened.
•Do not bind more than three fuse enclosures together. Otherwise, the fuses and their
enclosures may be damaged due to overheating. It is recommended that a clearance of 10 mm
or more be reserved between fuse enclosures. You are advised not to bind the fuse enclosures
with other heat emitting conductors.
•Do not place the Y-branch connector harness on the ground. A safe distance must be reserved
between the Y-branch connector harness and the ground to avoid impact caused by water on
the ground to the harness.
•It is recommended that Y-branch connectors be connected from the PV string side or
connected to the solar inverter with a safe distance of at least 4 m and bound to the PV
support.
•The DC input terminals of the solar inverter are prone to damage under stress. When Y-branch
connectors are connected to the solar inverter, bind and secure the connectors to prevent the
DC input terminals from bearing stress.

13
Wiring rules:
1. A maximum of one set of Y-branch connectors can be used for each MPPT.
2. The PV+ on the inverter side must be connected to the PV+ on the PV string side, and the PV–
on the inverter side must be connected to the PV–on the string side.
3. Preferentially and evenly connect the Y-branch connectors to the MPPTs controlled by DC
SWITCH 2 or DC SWITCH 3.
Number of
Y
-branch
Connector
Sets
Recommended MPPT to Be
Connected
Number of
Y
-branch
Connector
Sets
Recommended MPPT to Be
Connected
1
MPPT9
2
MPPT6
、MPPT9
3
MPPT6
、MPPT7、MPPT9
4
MPPT4
、MPPT6、MPPT7、
MPPT9
5
MPPT4
、MPPT6、MPPT7、
MPPT8
、MPPT9
6
MPPT4
、MPPT5、MPPT6、
MPPT7
、MPPT8、MPPT9
7
MPPT3
、MPPT4、MPPT5、
MPPT6
、MPPT7、MPPT8、
MPPT9
8
MPPT1
、MPPT3、MPPT4、
MPPT5
、MPPT6、MPPT7、
MPPT8
、MPPT9
9 MPPT1、MPPT2、MPPT3、
MPPT4、MPPT5、MPPT6、
MPPT7、MPPT8、MPPT9
N/A
N/A
a. Connecting Y-branch connectors to the PV strings (recommended)

14
b. Connecting Y-branch connectors to the solar inverter with a safe distance (recommended)
c. Connecting Y-branch connectors to the solar inverter

15
The SUN2000 has three DC switches (DC SWITCH 1, DC SWITCH 2, and DC SWITCH3).
DC SWITCH 1 controls routes 1–6 of DC input terminals, DC SWITCH 2 routes 7–12, and DC
SWITCH 3 routes 13–18.
Select DC input terminals according to the following rules:
1. Evenly distribute the DC input power cables to the DC input terminals controlled by the three DC
switches. DC SWITCH 1 is preferred.
2. Maximize the number of connected MPPT circuits.
Ensure that the PV module output is well insulated to ground.
Selecting DC Input Terminals
1. Use the MC4 EVO2 PV connectors delivered with the SUN2000. If the PV connectors are lost or
damaged, purchase the connectors of the same model. The device damage caused by
incompatible PV connectors is beyond the warranty scope.
2. Before connecting DC input power cables, label the cable polarities to ensure correct cable
connections. If the cables are connected incorrectly, 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 polarity of the DC input power cable is reversed and the DC switch is ON, do not turn off the
DC switch immediately or unplug positive and negative connectors. The device may be
damaged if you do not follow the instruction. The caused equipment damage is beyond the
warranty scope. Wait until the solar irradiance declines and the PV string current reduces to
below 0.5 A, and then turn off the three DC switches and remove the positive and negative
connectors. Correct the string polarity before reconnecting the string to the SUN2000.

16
Installing a DC input power cable
13001462
(STAUBLI)
Click
32.6020-22100-HZ
(STAUBLI)
Positive metal contact
Negative metal contact
Use a multimeter
to measure the
DC voltage.
Ensure that the cable
cannot be removed after
crimped.
Click
Positive connector
Negative
connector
Ensure that
the locking
nut is
secured.
Communication Port Pin Definition
Installing the RS485 Communications Cable
4.10
1. The RS485 and MBUS communication modes are mutually exclusive.
2. When routing communications cables, separate communications cables from power cables to
prevent communication from being affected.
Port
Pin
Definition
Pin
Definition
Description
RS485
-1
1
RS485A IN,
RS485
differential signal+
2
RS485A OUT,
RS485
differential signal+
Used for cascading
inverters or connecting to
devices such as the
SmartLogger.
3
RS485B, RS485
differential signal
–
4
RS485B, RS485
differential signal
–
PE
5
PE, shielding ground
6
PE, shielding ground
-
RS485
-2
7
RS485A, RS485
differential signal+
8
RS485B, RS485
differential signal
–
Used for connecting to
RS485 slave devices.

17
Connecting Communications Cables (4–8 mm Four-Hole Rubber Plug)
When using the four-hole rubber plug, block the unused cable hole with a plug, and then tighten
the locking cap.

18
5Verifying the Installation
1.
The SUN2000 is installed correctly and securely.
2.
The DC switches and downstream AC switch are OFF.
3.
All ground cables are connected securely, without open circuits or short circuits.
4.
AC output power cables are connected correctly and securely, without open circuits or short
circuits.
5.
DC input power cables are connected correctly and securely, without open circuits or short
circuits.
6.
The RS485 communications cable is connected correctly and securely.
7.
The maintenance compartment door is closed and the door screws are tightened.
8.
Unused DC input terminals are sealed.
9.
Unused USB ports are plugged with watertight caps.
Connecting Communications Cables (4–8 mm Two-Hole Rubber Plug)
If three communications cables are to be connected, use the three-hole rubber plug that is bound
in the maintenance compartment.

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6Powering On the System
1. Turn on the AC switch between the SUN2000 and the power grid.
2. Set DC SWITCH 1 (MAIN SWITCH) at the bottom of the SUN2000 chassis to ON.
3. Check the status of LED 1. If it is steady green, set DC SWITCH 2 and DC SWITCH 3 to
ON.
4. Observe the LED indicators to check the SUN2000 operating status.
Display Category
Indicator Status
Description
PV indication
LED1
LED4
-
Steady green
-
At least one PV string is properly connected, and
the DC input voltage of the corresponding MPPT
circuit is higher than or equal to 500 V.
Blinking
green at
short
intervals
Steady
red
An environmental fault occurs at DC side.
Off
-
The SUN2000 disconnects from all PV strings, or
the DC input voltage of each MPPT circuit is less
than 500 V.
Grid
-tied indication
LED2
LED4
-
Steady green
-
The SUN2000 has connected to the power grid.
Blinking
green at
short
intervals
Steady
red
An environmental fault occurs at AC side.
Off
-
The SUN2000 does not connect to the power grid.
Communications
indication
LED3
-
Blinking green at short
intervals
The SUN2000 receives data over RS485 or MBUS
communication.
Off
The SUN2000 has not received data over RS485
or MBUS communication for 10 seconds.
Before turning on the AC switch between the SUN2000 and the power grid, use a multimeter to
check that the AC voltage is within the specified range.
•Blinking at short intervals (on for 0.2s and then off for 0.2s).
•Blinking at long intervals (on for 1s and then off for 1s).