Sunways NTX3000 User manual

User Manual
Sunways Solar Inverter
NTX 3000/4000/5000/6000
english EN

Copyright Declaration
Copyright @ 2011 SUNWAYS AG. All rights reserved.
No part of this document may be reproduced, stored in a retrieval system, or transmitted, in any form or by
any means, electronic, mechanical, photographic, magnetic or otherwise, without the prior written permis-
sion of SUNWAYS AG.
SUNWAYS AG makes no representation, express or implied, with respect to this documentation or any of the
equipment and/or software it may describe, including(with no limitation) any implied warranties of utility,
merchantability, or fitness for any particular purpose. All such warranties are expressly disclaimed. Neither
SUNWAYS AG nor its distributors or dealers shall be liable for any indirect, incidental, or consequential dam-
ages under any circumstances. (The exclusion of implied warranties may not apply in all cases under some
statutes, and thus the above exclusion may not apply.)
Specifications are subject to change without notice. Every attempt has been made to make this document
complete, accurate and up-to-date. Readers are cautioned, however, that SUNWAYS AG reserves the right to
make changes without notice and shall not be responsible for any damages, including indirect, incidental or
consequential damages, caused by reliance on the material presented, including, but not limited to, omis-
sions, typographical errors, arithmetical errors or listing errors in the content material.
All trademarks are recognized even if these are not marked separately. Missing designations do not mean
that a product or brand is not a registered trademark.
SUNWAYS AG
Max-Stromeyer-Strasse 160,
D-78467 Konstanz, Germany
E-mail: [email protected]
www.sunways.de.

Important Safety Instructions
3
IMPORTANT SAFETY INSTRUCTIONS
Save these instructions
This manual contains important instructions for NTX
inverter, that must be followed during installation
and maintenance of the inverter.
The NTX is designed and tested according to inter-
national safety requirements, but as with all electri-
cal and electronic equipment, certain precautions
must be observed when installing and/or operating
the NTX. To reduce the risk of personal injury and
to ensure the safe installation and operation of the
NTX. You must carefully read and follow all instru-
cions, cautions and warning in this user manual.
Warning in this document
This manual provides safety operation information
and uses the symbol in order to ensure personal and
property security and use the inverter efficiently
when operating the inverter. You must understand
and absolute these emphasize information to avoid
the personal injury and property loss. Please read
the following symbols which used in this manual
carefully.
DANGER
DANGER indicates a hazardous situation which, if
not avoided, will result in death or serious injury.
WARNING
WARNING indicates a hazardous situation which, if
not avoided, could result in death or serious injury.
CAUTION
CAUTION indicates a hazardous situation which,
if not avoided, could result in minor or moderate
injury.
NOTICE
NOTICE is used to address practices not related to
personal injury.
Other symbols in this document
In addition to the safety and hazard symbols
described in the previous pages, the following sym-
bols are also used in this user manual:
Remark:
These symbols note that call attention to supple-
mentary information that you must know and use to
ensure optional operation of the system.
Marking on this product
The following symbols are used as product marking
with the following means.
Warning regarding dangerous voltage
The product works with high voltages. All work on
the product must only be performed as described in
its documentation.
Electric arc hazards
The product has large electrical potential differ-
ences between its conductors. Arc flashes can occur
through air when high-voltage current flows. Do
not work on the product during operation.
Beware of hot surface
The product can become hot during operation. Do
not touch the product during operation.

Important Safety Instructions
4
General Warnings
GENERAL WARNINGS
All electrical installations must be done in accor-
dance with local and National Electrical Code® ANSI/
NFPA 70. For installation in Canada the installations
must be done in accordance with applicable Cana-
dian standards.
The NTX contains no user-serviceable parts except
for the fans on the buttom of the enclose and the
filters behind the fans. For all repair and main-
tenance, always return the unit to an authorized
Sunways Service Center.
Before installing or using the NTX, read all of the
instructions, cautions and warnings in the user
manual.
Before connecting the NTX to the electrical utility
grid, contact the local utility company. This connec-
tion must be made only by qualified personnel.
Warning of the NTX must be made by qualified
personnel only.
WARNING
Risk of electric shock and fire. Use only with PV
modules with a maximum system voltage of rating
of 550 V or lower.
Observe the operating instructions
Read the product’s documentation before working
on it. Follow all safety precautions and instructions
as described in the documentation.
AC current
DC current
Earth Ground
UL 1714 is the standard applied by Canadian Stan-
dards Association to the NTX to certify that it meets
the requirements of National Electrical Code®and
functionality necessary to ensure compatible opera-
tion when power generation is connected to the
utility grid.

Contents
5
Contents
1 Notes on this manual 8
1.1 Validity 8
1.2 Target group 8
1.3 Storage of the documentation 8
1.4 Additional information 8
1.5 Nomenclature 8
2 Safety 9
2.1 Appropriate usage 9
Anti-Islanding protection 10
PV series fusing 10
Operating temperature 10
Interconnection code compliance 10
FCC compliance 10
2.2 Safety instructions 11
2.3 Installation overview 11
3 Unpacking and inspection 12
3.1 Scope of delivery 12
3.2 Product label 13
4 Mounting 14
4.1 Safety 14
4.2 Package inspection 14
4.3 Installation precaution 15
4.4 Preparation 16
4.5 Installation steps 16
5 Electrical connection 19
5.1 General electrical connection procedure
of NTX inverter 20
Pin Definition 21
Wiring procedure of NTX inverter 23

Contents
6
5.2 Opening wiring cover of NTX inverter 23
5.3 AC wiring 23
AC voltage configuration 24
AC wiring procedure 25
5.4 DC wiring 26
Configuring the DC input channel 26
DC wiring procedure 27
Connection to a single PV array
(NTX 4000/5000/6000) 27
Parallel Connection to 2 PV arrays
(NTX 4000/5000/6000) 28
Two MPPTS connection to 2 PV arrays or
4 PV arrays (NTX 4000/5000/6000) 28
Connection to 1 PV array or 2 PV arrays
(NTX 3000) 28
5.5 Communication wiring 29
6 Commissioning 31
7 Display and messages 32
7.1 LED indicators 32
7.2 Available Data 33
Real-time operational data 33
Internally logged data 33
7.3 LCD display and operation 33
Display upon start-up 33
Default Menu 34
Main Menu 34
Running Menu 34
Setting Menu 35
Event 39
Service 39
8 Troubleshooting 40
8.1 General 40
8.2 Messages and Error Codes 41
9 Maintenance 44
9.1 Cleaning the fans 44
9.2 Checking the DC Disconnect 44

Contents
7
10 Technical data 45
10.1 FCC compliance information 45
10.2 NTX wiring diagrams 46
NTX connections for 208 V and 240 V
AC grids 46
NTX connections for 277 V AC grids 46
10.3 Technical data 47
10.4 Trip limits/trip times 48
11 Contact 51
12 Notes 52

1 Notes on this manual
8
1 Notes on this manual
1.1 Validity
This manual describes the assembly, installation,
commissioning and maintenance of the following
Sunways inverters:
NTX 3000
NTX 4000
NTX 5000
NTX 6000
This manual does not cover any details concerning
equipment connected to the NTX (e.g. PV modules).
Information concerning the connected equipment is
available from the manufacture of the equipment.
1.2 Target group
This manual is for qualified personnel. Qualified
personnel have received training and have dem-
onstrated skills and knowledge in the construction
and operation of this device. Qualified personnel
are trained to deal with the dangers and hazards
involved in installing electric devices.
1.3 Storage of the documentation
Keep all NTX manuals in a convenient place for
future reference.
1.4 Additional information
You will find further information on special topics in
the download area at WWW.SUNWAYS.EU/EN.
1.5 Nomenclature
In this document SUNWAYS AG is referred to the fol-
lowing as Sunways.

2 Safety
9
2 Safety
2.1 Appropriate usage
The NTX is a DC to AC grid-tied utility interactive
inverter for use with photovoltaic (PV). In general,
the NTX takes power from a DC source (PV modules)
and converts it to AC power for the utility grid. This
power is delivered first to local loads (household
appliance, lights, motor loads, etc.), with any excess
power fed to the utility. The power consumed by
the local loads reduces the power needed from the
utility. Excess power may actually spin the utility
meter backwards depending on the type of meter
in you system. This power may also be recorded as
power credits by the utility company depending on
the interconnection agreement. An example of basic
system components is shown in figure below.
Principle of a PV plant with a NTX:
12345
1 PV array
2 NTX with DC Disconnect
3 Local loads
4 Energy meter
5 Utlity Grid
Remark:
Policies vary from one utility company to another.
Consult with a representative of the local util-
ity company before designing and installing a PV
system.

2 Safety
10
Anti-Islanding protection
Islanding is a condition that can occur if the utility
grid is disconnected while the NTX is operating and
the remaining load is resonant at 60 Hz and matches
the output of the NTX perfectly. This condition
is highly unlikely and had never been witnessed
outside of a controlled laboratory. Nevertheless,
the NTX incorporates an advanced active islanding
protection algorithm to ensure that the system will
not export power into a balanced 60 Hz resonant
load while the utility is disconnected. The NTX peri-
odically injects both leading and lagging reactive
current into the utility grid. This method has been
proven by Canadian Standards Association to effec-
tively destabilize and disconnect from a balanced
island condition.
The NTX is equipped with a ground isolation fault
detection device. If a ground isolation fault is
detected, the NTX will not run and display the fault
function on the user interface display. Once the
ground fault is located and corrected, the ground
fault error will need to be manually cleared and
the inverter will then resume normal operation
automatically.
PV series fusing
Series fusing may be required depending on the
type of PV module used in the system.
See NEC 690.9.
Remark:
For NTX 6000, the AC fuses are optional installed in
the unit. When not provided with the unit, it should
be provided at end installation.
Operating temperature
The NTX has been designed to maintain full
power output at ambient temperatures as high as
+113°F(+45°C). Fan cooling allows this level of out-
put power to be achieved even in enclosed spaces.
The NTX will continue to operate well between
+113°F(+45°C) and +140°F(+60°C) and de-rates as
needed to maintain a safe internal component
temperature.
WARNING
Continuous storage time must be less than 3 months
below -13°F(-25°C).
Interconnection code compliance
The NTX has been tested and listed by Canadian
Standards Association to meet the requirements of
UL 1741 Static Inverters and Charge Controller for
use in Photovoltaic Power Systems and IEEE 1547
Standard for Interconnecting Distributed Resources
with Electric Power System. The NTX is also listed
under UL 1741 for Nationally Recognized Testing
Laboratory.
UL 1741 is the standard applied by Canadian Stan-
dards Association to the NTX to certify that it meets
the requirements of National Electrical Code®and
functionality necessary to ensure compatible opera-
tion when power generation is connected to the
utility grid.
Remark:
Contact the local utility and/or the authority having
jurisdiction prior to connecting the NTX to the utility
grid.
FCC compliance
The NTX has been tested and shown to confirm with
all FCC Part 15 B EMI/EMC emissions regulations.

2 Safety
11
2.2 Safety instructions
DANGER
· High voltages are present in the NTX during
the operation. Death or seriously injury due to
electric shock.
· All work on the NTX must only be carried out by
qualified personnel.
WARNING
The NTX can become hot during operation.
Risk of burns: Do not touch enclosure during opera-
tion; Only touch panel during operation.
WARNING
When the NTX is running, connect it to the ground.
2.3 Installation overview
This section provides a brief overview of the installa-
tion process of NTX.
Section 3: Unpacking and inspection
This section provides instructions and information
for unpacking the NTX and inspecting it for shipping
damage.
Section 4: Mounting
This section includes guidelines to help you select
the best mounting location, suggestions to ensure
optimum performance, cautions and warnings that
you should follow to avoid injury and/or equipment
damage and step-by-step instructions for mounting
the NTX inverter.
Section 5: Electrical connection
This section includes configuration of AC voltage
and DC input channel, guidelines for selecting the
correct wire size, cautions and warnings that you
should follow to avoid injury and/or equipment
damage and step-by-step instructions for wiring the
NTX to a PV array, household electrical circuits and
the utility grid. Procedures are also included for con-
necting optional data-communication cables.
Section 6: Commissioning
Commissioning involves applying DC input power
to the NTX, observing the LED and LCD indicators
on the front cover, and resolving any problems that
occur.
Section 7: Displays and messages
This section provides messages for displays, settings
and faults during installation and operation.
Section 8: Troubleshooting
This section provides troubleshooting tips and
procedures for resolving problems that may occur
during installation and operation.
Section 9: Maintenance
This section includes maintenance and cleaning of
the NTX and cautions and warnings you should fol-
low to avoid injury and/or equipment damage.
Section 10: Technical data
This section includes technical data for the NTX, con-
nection diagrams and torque specifications for the
connection of cables and the screws of the NTX.

3 Unpacking and inspection
All NTX inverters are thoroughly tested and
inspected before they are packed and shipped.
Although they are shipped in sturdy, recyclable
packaging, damage can still occur during shipping.
It is important to carefully inspect the shipping
container prior to beginning the installation. If any
external damage to the packaging makes you sus-
pect the inverter itself could be damaged, or if you
find that the inverter is damaged after unpacking
it, report the damage immediately to your Sunways
dealer and to the shipping company that delivered
the NTX. If it becomes necessary to return the NTX,
use the original packaging in which it was delivered.
CAUTION
Failing of the NTX may cause injuries.
Crushing of body parts will result in injuries.
Take the weight of the NTX of 60.6 lbs. (27.5 kg)
into account when mounting.
If you need assistance with a damaged NTX, contact
your Sunways dealer or Sunways. Contact informa-
tion is provided in section “11 Contact”, see page
51.
3.1 Scope of delivery
CD-ROM
Sunways Solar Inverter
NTX 3000
NTX 4000
NTX 5000
NTX 6000
Copyright
Sunways AG
Photovoltaik Technology
Max-Strohmeyer-Strasse 160
D-78467 Konstanz
Germany
SD101312A 12/12
Monitoring Software
Sunways NTX
EN
1 2 3 4 5 6 7 8 9
Position Number Description Remark
11NTX series inverter –
21Bracket –
31Screw bag Screw bag containing:
Nr.4 M6x40 screws;
Nr.4 PEB8-38 wall plugs;
Nr.2 M6x10 screws.
41Packing list –
51Product manual –
61Warranty card –
71Quality certificate –
82Magnetic buckle –
91CD –

3 Unpacking and inspection
13
3.2 Product label
The product label provides basic information of the
inverter. Pay special attention to the type of inverter
and other specifications.

4 Mounting
14
4 Mounting
4.1 Safety
WARNING
The electrical installation of the NTX inverter must
be performed in accordance with the electrical stan-
dards prescribed by the local regulations and by the
National Electric Code (ANSI/NFPA 70 standard).
WARNING
The connection of a NTX inverter to the electrical
distribution grid must be performed only receiving
authorization from the utility that operates the grid.
WARNING
Before installation and maintenance, AC and DC
side does not carry electricity. If DC side is just
disconnected, capacitance still contains electric-
ity, so please wait for at least 5 minutes to ensure
the capacitors completely release the energy and
inverter is not electrified.
WARNING
Inverters must be installed by qualified person.
4.2 Package inspection
NOTE
The distributor delivered your NTX inverter to
the carrier safely packaged and in perfect condi-
tion. Upon acceptance of the package, the carrier
assumes responsibility for its safe delivery. In spite
of careful handing, transportation damage to the
package or its contents is always a possibility.
The customer is encouraged to perform the follow-
ing checks:
· Inspect the shipping box for apparent damage,
such as holes, cracking, or any other sign of pos-
sible damage to its contents.
· Describe any damage or shortage on the receiv-
ing documents and have the carrier sign his/her
full name.
· Open the shipping box and inspect the contents
for internal damage. While unpacking, be careful
not to discard any equipment, parts or manuals.
If any damage is detected, call the delivering
carrier to determine the appropriate action. Save
all shipping material in the event that the carrier
sends an inspector to verify damage!
· If the inspection reveals damage to the inverter,
contact your supplier or authorized distributor.
They will determine if the equipment should
be returned for repair. They will also provide
instructions on how to get the equipment
repaired.
· It is the customer’s responsibility to file a claim
with the carrier. Failure to file a claim with the
carrier may void all warranty service rights for
any damage.
· Save the NTX series inverter’s original shipping
package in the event that you should ever need
to return the inverter for repair.

4 Mounting
15
4.3 Installation precaution
Installation site should be selected based on the fol-
lowing considerations:
· The ambient temperature is in the range of
tolerable ambient temperature (-25°C to +60°C,
-13°F to +140°F);
· Lower than the altitude of about 2000m above
sea level;
· Unable to be damaged by sea water;
· Don’t be exposed to steam, vapor, or water;
· Far away from corrosive gas or liquid (for exam-
ple, locations where chemicals are processed or
the location where feed lots of poultry).
· Far away from the television antenna or antenna
cable;
· Choose a location that allows unobstructed air-
flow around the inverter;
· Allow sufficient room around the inverter to
enable easy installation and removal from the
mounting surface.
WARNING
Not installing the inverter in the place mentioned
above may cause the malfunction of the system.
Sunways will not compensate the fault caused by
the above situation.
The following figures show the recommended
installation of the inverter:
Minimum clearance for NTX series inverter
300 mm 300 mm
200 mm
500 mm
Recommended arrangement

4 Mounting
16
Recommended installation of NTX inverters
Tilted Mounting
Derating
NO Derating
Derating
Derating
-5° +5°
0°
NOTE
Vertical mounting is propositional. Tilted mounting
is permitted, but will reduce heat dissipation and
result in self-derating.
4.4 Preparation
Below tools are needed before installation:
Installation tools:
Crimping plier for binding post, crimping plier for
RJ45 and RJ11, screwdriver, allen wrench and Ø8
driller.
4.5 Installation steps
1. Drill holes in the concrete wall with Ø8 driller
according to the size of bracket. The size is
shown in following figure. Keep drilling verti-
cal to the wall, and don’t shake when drilling
to avoid damage to the wall. The depth of the
holes should be about 45 mm and should be the
same. After removing the dust in the holes, mea-
sure the net depth of the holes. If the depth is
more than 50 mm or less than 40 mm, the expan-
sion tubes wouldn’t be installed and tightened.
NOTE
When the wall is made of a different material (other
than concrete), the installation should be done
using adequate mounting material. Sunways recom-
mends always using stainless steel screws.
The size of the holes
100
Ø8
375 110
2. Clean all dust outside/inside the hole and mea-
sure pitch-row before installation. It need repo-
sitioning and drilling holes if the hole with much
error. Then put wall plug into the hole vertically
(shown in the following figures), use rubber
hammer to tap the pipe into the wall completely.
After that, mount the metal bracket to a con-
crete wall. The screws should be mounted in the
4 holes present in the bracket (shown as pos A in
the following figures).

4 Mounting
17
Installation of wall plug
Installation of bracket
A
A
A
A
BB
NOTE
The bracket needs to be mounted vertically to the
wall and the side with the hook (shown as pos C in
the next figure) should be mounted with the hook
pointing upward as shown in the figure.
3. After the bracket is secured to the wall, install
the inverter as shown in the following figure.
The inverter should be hung onto the bracket
using the hook D and the hole F that need to be
well inserted into their counterparts C and E (D
connects to C and F connects to E).
Wall mounting of inverter
C
E
D
F
4. After the inverter is hung onto the wall mount-
ing, it needs to be secured using the M6x10
screws that will pass through the opening on the
lower side of the inverter (shown as pos H in the
following figure) into to the PEM faster (shown
as position B).
Fasten inverter installation
H
H

4 Mounting
18
5. Lock the inverter and the bracket with lock for
safety.
Lock the inverter
6. Complete the installation process.

5 Electrical connection
19
5 Electrical connection
WARNING
The electrical connections must be connected only
after the NTX inverter is firmly mounted to the wall.
WARNING
The connection of NTX inverter to the electrical dis-
tribution grid must be performed by qualified and
trained personnel and only after receiving authori-
zation from the utility that operates the grid.
WARNING
For a step-by-step description of the correct proce-
dure, please read closely and follow the instructions
provided in this section (and its subsection) and all
safety warning. Not complying with the instructions
that follow can lead to hazards and possible injury
to personnel and/or equipment damage.
WARNING
AC side field wiring should be secured away from
DC side field wiring.
WARNING
Always respect the normal ratings of voltage and
current defined in section “10 Technical data”, see
page 45 when designing your system. Please
observe these considerations in designing the PV
system:
· Maximum array DC voltage input to each MPPT
circuit: 550 V DC under any condition.
· Maximum array DC current input to each MPPT
circuit: 17.5 A DC under any condition. For NTX
6000 models, 14.5 A DC under any condition,
for NTX 5000 models, 11 A DC under any condi-
tion, for NTX 4000 models, 17.5 A DC under any
condition, for NTX 3000 models (only one MPPT
input).
WARNING
On the AC output side an AC breaker/disconnected
should be inserted between the NTX inverter and
the distribution grid. On the DC input side NTX
inverter has an optional integrated DC disconnect.
WARNING
To reduce the risk of fire, connect only to a circuit
provided with maximum branch circuit over current
protection in accordance with the National Electric
Code (ANSI/NFPA 70).

5 Electrical connection
20
5.1 General electrical connection procedure of
NTX inverter
The DC input from the PV arrays and the output to
the AC utility grid connect to the inverter inside the
NTX inverter case. AC, DC and COM knockouts are
provided on the bottom of the NTX inverter.
±DC1 ±DC2 AC GRID
COM
OFF
ON
15
234
1 OFF
ON
2 ±DC1 (DC knockouts-water tight plug size: M32)
3 ±DC2 (DC knockouts-water tight plug size: M32)
4 AC GRID (DC knockouts-water tight plug size:
M32)
5 COM (Communication knockouts-water tight
plug size: M20)
WARNING
The AC and DC knockouts are sized for 1 in. con-
duits, and the communication knockouts are sized
for 1/2 in. rigid conduits. Do not enlarge the knock-
out holes because this will result ingress of water
and damage to the inverter.
2
1
4
3
1 1/2 in. conduit
2 1/2 in. conduit fitting
3 1 in. conduit
4 1 in. conduit fitting
WARNING
In order to tighten correctly the screw terminal of
the inverter, Pin Definition applied, AWG size, tem-
perature and torque listed in the following tables.
The restrictions on minimum AWG value are due
to cable gland. The resteictions on maximum AWG
value are due to National Electric Code (ANSI/NFPA
70).