Sungrow PVS-18RM User manual

PVS-18RM-UEN-202010
PVS-18RM
PV Reverse Combiner Box
User Manual

Table of Contents
1About This Manual..............................................................1
1.1 Applicability ...............................................................................1
1.2 Brief introduction .......................................................................1
1.3 Intended audience.....................................................................1
1.4 Using this manual......................................................................2
1.5 Symbols ....................................................................................2
2Safety instructions..............................................................4
3Product description ............................................................7
3.1 System introduction...................................................................7
3.2 Key features..............................................................................7
3.3 Appearance and structure.........................................................8
4Mechanical Installation.......................................................9
4.1 Scope of supply.........................................................................9
4.2 Dimensions ...............................................................................9
4.3 Storage....................................................................................10
4.4 Installation............................................................................... 11
4.4.1 Installation environment requirements..................................... 11
4.4.2 Installation tool preparation...................................................... 11
4.4.3 Installation method ..................................................................13
5Electrical Installation ........................................................14
5.1 System diagram overview .......................................................14
5.2 Internal structure .....................................................................15
5.3 Waterproof terminal.................................................................15
5.4 Preparation before wiring ........................................................16
5.5 Wiring......................................................................................17
5.5.1 Input wiring.............................................................................. 17
5.5.2 Output wiring...........................................................................20
5.5.3 Grounding ...............................................................................22

6Power Up/Down.................................................................25
6.1 Power up..................................................................................25
6.2 Power down.............................................................................25
7Routine Maintenance........................................................26
7.1 Replacing the fuse...................................................................26
7.2 Replacing the sealing strip.......................................................27
8Appendix............................................................................28
8.1 Basic parameters.....................................................................28
8.2 Warranty ..................................................................................28
8.3 Contact information..................................................................30

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1 About This Manual
1.1 Applicability
This manual is applicable to PVS-18RM PV reverse combiner box which are
hereafter referred to as "combiner box" unless otherwise specified.
1.2 Brief introduction
This manual is intended for combiner boxes and covers the following:
Safety instructions
describes the safety precautions for operating and maintaining the combiner
box.
Product description
describes the overall dimensions and external composition of the combiner
box.
Installation
describes the mechanical installation and electrical connection of the
combiner box.
Routine Maintenance
describes how to replace the fuse of the combiner box.
Miscellaneous
describes the technical data, quality assurance clauses of the combiner box
and contact information.
1.3 Intended audience
This manual is intended for personnel who operate, maintain and perform other
work on the combiner box. The personnel who operate the combiner box
electrically should have knowledge of electricity and be familiar with the
electrical schematic diagram and the characteristics of the electronic
components.

1 About This Manual User Manual
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1.4 Using this manual
Please read this manual carefully before using this product. Please put this
manual and other materials of the module together so that relevant personnel
can easily access it.
All contents, pictures, logos and symbols in this manual are the property of
SUNGROW. No part of this manual shall be reproduced, in whole or in part,
without written authorization by SUNGROW.
Descriptions in this manual are subject to changes and may differ from the
physical product. Please refer to the actual product purchased.
1.5 Symbols
This manual contains notices which you should observe to ensure your own
personal and property safety or to ensure efficient use and optimal product
performance. These notices are highlighted with appropriate symbols.
The symbols that may be used in this document are listed below. Please read
carefully to make better use of this manual.
"Danger" indicates high-risk potential hazards that, if not avoided, will
lead to death or serious injury.
"Warning" indicates moderate-risk potential hazards that, if not
avoided, may lead to death or serious injury.
"Caution" indicates a slightly hazardous situation which, if not
avoided, may result in minor or moderate injury.
"Note" indicates potential risks that, if not avoided, can lead to device
malfunction or financial losses.

User Manual 1 About This Manual
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"Information" indicates additional information in the manual, which is
an emphasis or supplement to the manual and may provide tips for
users to better use the product, solve problems or save time.
Always pay attention to the hazard warnings on the machine, including:
Symbol
Description
indicates high voltage in the machine. touching it may cause electric
shock.
indicates the temperature exceeding the acceptable range for the
human body. It is prohibitted to touch it in order to avoid personal
injury.
indicates a protective ground terminal. This terminal should be firmly
grounded in order to ensure the safety of the operator.

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2 Safety instructions
You are advised to read this chapter carefully before installing and using the
combiner box. SUNGROW assumes no responsibility or quality assurance for
any personal injury or device damage due to failure to observe these safety
precautions.
There is a high voltage in the PV string. Accidental contact may cause
fatal electric shock or severe burns. When wiring the combiner box,
you need to:
disconnect the end of the PV string before wiring.
follow the string manufacturer’s safety instructions.
Damaged device or system failure may cause electric shock or fire!
Before operation, visually check the device for damage or other hazards.
Check that other external devices or circuit connections are safe.
Make sure the device is safe before operating.
Touching the internal terminals of the device may result in electric
shock or fire!
Do not touch the terminals or conductors connected to the inverter or
string.
Pay attention to all instructions or safety documents regarding the
connection of the combiner box.

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There may be a high voltage electric shock hazard inside the product!
Note and observe the warnings on the product.
Observe the safety precautions listed in this manual and other related
documents of this device.
The grounding cable must be well connected to ground, otherwise:
It may cause fatal electric shock to the operator in case of failure!
The device may be damaged when struck by lightning!
Incorrect cable connection can cause damage to PV modules,
combiner boxes, and inverters. When wiring, observe the following
precautions:
Wire according to the wiring drawing.
Before wiring, measure the open circuit voltage of the string to ensure that
the DC input voltage range meets the requirements of the combiner box.
Before wiring, check the positive and negative polarity of the string and
ensure that there is no ground fault.
Operation and wiring can only be done by professional electricians or
qualified personnel.
Operations and wiring must be done in accordance with relevant national
and local standards.
Warning signs must be legible and should be replaced immediately if
damaged.

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When wiring, make sure that the fastening screws of the combiner box
terminal are tightened in place. If the copper core of the cable cannot
be in full contact with the wiring terminal or pressed tightly, the
terminal would be heated and burned after a prolonged period.
Multi-strand copper core flame-retardant cables must be used, with the
wire diameter not less than the recommended value in the appendix.
The screw cap of the waterproof terminal must be fastened in place,
otherwise it may cause water leakage and damage the combiner box.
Do not check or replace the fuse with load! Installation and removal of
the fuse must be carried out with no load to avoid arc damage to the
device personal injury.
After operation, be sure to lock the door.
Do not open the door cover of the combiner box frequently to avoid
affecting its waterproof performance.