Sunways NT 2600 User manual

200
MANUAL
User Manual for
Sunways Solar Inverters NT 6000, NT 5000,
NT 4000 and NT 2600
New Version
850 V

SOLAR
INVERTERS
User Manual for Sunways
Solar Inverters NT 6000, NT 5000, NT 4000
and NT 2600

EN
R
S
List of Contents
1.0 General information
1.1 Safety information
1.2 Sunways Solar Inverters NT
6000, NT 5000, NT 4000 and
NT 2600
2.0 Information on installation
2.1 Safety information
2.2 Basic configuration
2.3 Installation
93
94
95
96
97
98
100
101
102
103
105
106
107
89
General safety information
Opening the unit
Scope of supply
Inspecting the delivery
Integration into the PV system
Design of the PV generator
Standard components of a PV system
Protection concept
Electrical safety
Mechanical safety
Information on cleaning
Fixed voltage setting
Country selection
Requirements on the place of installation
Electrical connection and cable entry
Grid connection

2.4 Commissioning
3.0 Information on operation
3.1 Monitoring and diagnosis
3.2 Sunways NT Monitor software
3.3 Fault indications
3.4 Fault diagnosis
109
111
112
114
116
118
120
125
126
127
128
129
134
136
137
139
143
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PV generator connection
Important Information
Communication connections
Connection of the alarm relay
Connecting the sensors
Switching the solar inverter on and off
Configurations
Display
Data memory
General information
Initialising the remote modem
Connection and circuitry options
Configuring the interface cables
Data acquisition
Operation
Fault indications
Fault display, causes and remedies

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3.5 Warranty terms and conditions
4.0 Appendix
4.1 Subject and abbreviation index
4.2 Function and information index
150
153
155
158
160
164
166
170
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Warranty terms and conditions
Designation and description
Functional principle and explanations
Block diagram of the Solar Inverter in
the PV system
Technical data
Tyco Solarlok connectors
Conformity and safety declarations
General exclusion of liability
Rights
Registered trademarks

1.0 General information
92

EN
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1.1 Safety information
The User Manual contains safety hints.
These are identified by a triangle with an
exclamation mark.
General safety information
All safety hints contained in this section
and throughout the User Manual must
be complied with at all times to guarantee
the user's safety. The described product
must not be operated if any mechanical
or electrical components are defective.
Before commissioning the system, we
strongly advise you to carefully read and
heed the instructions! Non-compliance
can have serious consequences, for exam-
ple damage to the unit or other property
or physical injuries with possible loss of
life.
The solar inverter must be installed by a
trained, qualified electrician. The electrici-
an must be approved by the competent
electricity board (EB). The relevant tasks
to be carried out are identified by an addi-
tional adjacent symbol in the respective
chapter headings.

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Opening the unit
Before opening the cabinet, the unit must
always be disconnected from the grid and
from the PV generator.
The unit continues to conduct a hazardous
voltage internally and at the connection
sockets for ca. five minutes after disconnec-
ting from the PV generator. The energy
storage capacitors are only fully discharged
after this period.
After disconnecting the unit from the grid
and from the PV generator, you must wait
at least five minutes before opening the
unit.

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1.2 Sunways Solar Inverters NT 6000,
NT 5000, NT 4000 and NT 2600
Scope of supply
· Sunways Solar Inverter in the NT series
· Installation frame
· Manual, setup, warranty card, CD-Rom
with software
· 2 pairs of Tyco Solarlok connectors
95
Inspecting the delivery
The condition of our products is checked
prior to delivery. Although our products
are carefully packed in recyclable packing,
transportation damages can still occur.
These are generally the transport compa-
ny's responsibility.
Please inspect the delivered solar inverter
thoroughly!
If you discover any damage to the packing
or the solar inverter, please inform the
transport company immediately. Your
specialist dealer will be glad to assist you
if required. Any damages must always be
reported to the transport company in wri-
ting seven days after receipt of the goods
at the latest.

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Integration of the solar inverter into the
PV system
Design of the PV generator
The technical data of the selected PV
generator must be within the specification
of the solar inverter (see Technical Data).
Incorrect dimensioning can cause losses in
yield and destruction of the unit. The
Sunways NT Sundim design program for
the PV generator may be helpful. Sunways
NT Sundim is available on the enclosed
CD or from our website, www.sunways.de.
Please take account of the following points
before planning your system:
· Pay attention to the skyward alignment
of the modules. You will obtain maxi-
mum yield in Central Europe with a
module inclination of 30° to the hori-
zontal and a direct southerly alignment
of the generator field.
· The output of the cells decreases as the
module temperature increases. Install
your PV generator with adequate rear
ventilation.
· Check your PV generator for soiling ca.
every three years. This occurs particularly
at the lower edge of the modules and
forms a film, which even heavy rain can-
not wash away. Decreases in yield can be
prevented by cleaning with a wet cloth
or a brush.
· Avoid shading of individual modules or
solar cells in your system. This can result
in heavy losses in yield.

Standard components of a PV system
Depending on the recommendations
of your electrician, your PV system will
consist of the following components:
PC
(3)
INVERTER
PV
PV (1)
(2)
(4)
GRID
PV generator switch:
Designed as DC load break cut-out to cut
off the PV generator from the solar inverter.
Dimensioning: min. 900 V, ≥16 A
Grid connection:
3-phase (Feed-in: 1-phase; grid monitoring:
3-phase)
Standard components of the PV system
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(1) PV generator switch
(2) Irradiation sensor with
integrated temperature
sensor
(3) Mains fuse
(4) Energy meter

Protection concept
The following parameters are monitored
continuously and in parallel by the micro-
controller and displayed on the screen:
· DC overvoltage (Fault 3)
· Frequency error (Fault 4)
· Overheating (Fault 5)
· Grid undervoltage, 1-phase (Fault 6)
· Grid overvoltage, 1-phase (Fault 7)
· Grid undervoltage, 3-phase (Fault 8)
· AFI error (Fault 9)
· Insulation error (Fault 10)
· DC feed (Fault 11)
· Isolated operation (Fault 12)
· Grid overvoltage, 3-phase (Fault 13)
· Surge error (Fault 14)
· Grid voltage 10-minute average value
> 10 % UNOM (Fault 15)
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In the event of a fault, the conversion is
blocked immediately and the grid relay is
isolated. An alarm relay with floating
output is activated (not for Fault 6).
In addition, the following protective
devices are provided on both grid and
PV generator side:
· Grid-side varistors
Protect the power semiconductors from
high-energy, time-limited voltage spikes
on the grid and provide for a reduction
of energy in the throttle in the event of
grid disconnection.
· Generator-side varistors
Thermally monitored varistors provide
protection against atmospheric overvol-
tages (e.g. due to remote strikes during
storms).

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2.0 Information on installation
99

2.1 Safety information
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Electrical safety
Before opening the cabinet, the solar
inverter must be disconnected from the
grid and from the PV generator.
The solar inverter conducts a hazardous
voltage internally and at the connectors of
the PV generator for approx. five minutes
after isolation from the PV generator and
the grid. The energy storage capacitors are
only fully discharged after this period.
After disconnecting the solar inverter from
the grid and PV generator, you must wait
at least five minutes before opening the
solar inverter.
Mechanical safety
During installation, make sure that the
cables or connection lines fitted to the
solar inverter are securely laid and that
suitable mechanical cable supports
(cable ducts etc.) are used.

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Information on cleaning
Before cleaning, disconnect the system
from the power grid by opening the grid
breaker (main fuse) and open the DC
switch on the PV generator, in order to
exclude the danger of electric shocks.
Use a soft, dry cloth to clean the system.
Never use corrosive, solvent-containing
or abrasive cleaners or polishes.

2.2 Basic configuration
Fixed voltage setting
Your Sunways solar inverter has a precise
MPP control. The control operates in fixed
voltage mode beneath a feed-in capacity
of 200 watts. This prevents unnecessary
MPP search behaviour. In order to minimi-
se the adaptive losses in fixed voltage
mode, the solar inverter has the facility to
set the fixed voltage level. The optimal
fixed voltage level is dependent on your
PV generator model.
The fixed voltage can be set with the S100
slide switch on the control board. At the
factory, the switch is set on the right in
status «410 V». In order to set a fixed vol-
tage of 530 V, slide the switch to the left
into the «530 V» position.
Fixed voltage level
depending on no-
load voltage
410 V
530 V
No-load voltage PV
generator at 25°C
≤630 V
> 630 V
Switch position
«410 V»
Switch position
«530 V»
(Fig.) Sliding switch to set the fixed
voltage level
102

EN
Country selection
Please note that a different device confi-
guration is required to operate Sunways
Solar Inverters in different countries. You
can make the relevant setting with DIP
switch S300 beneath the display panel.
Country
Germany
Spain
modification
·Disconnect interval after power failure
3 minutes
· 1-phase grid monitoring
switch position
(Fig.) DIP switch S300 for country selection
103

2.3 Installation
The solar inverter must be installed by a trained, qualified electrician. A special tool is
necessary for installation. Please read this chapter very carefully.
➟
150 mm
Cool air
Warm
air
300 mm 300 mm
150 mm
➟
➟
➟
(Fig.) Minimum
distances that
must be kept clear
around the solar
inverter
104

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105
If installing the solar inverter in a switch
box, ensure adequate heat dissipation.
The ambient temperature must not fall
below or exceed –25°C or +40°C.
The solar inverter should not be exposed to
direct solar irradiation, so as to protect it
from unnecessary external heating.
· Protection from damp and foreign bodies
The IP54 high protection class permits instal-
lation both inside and in roofed outdoor
areas, but the solar inverter must not be
exposed to direct rain.
Make sure that the solar inverter cannot be
exposed to foreign bodies (deposits of dust
and dirt). In order to avoid losses in yield,
the unit should be regularly freed from dust
deposits.
Requirements on the place of installation
· Mechanical bearing capacity
During installation please bear in mind
that the solar inverter weighs 26 kg. The
installation base must be firm and capable
of continuously bearing the weight.
· Thermal interaction
The installation base must consist of
flame-retardant material (e.g. no wood or
plastic in the base; concrete and brickwork
are suitable), as the heat sink emits tempe-
ratures up to max. 85°C.
A minimum distance of 300 mm must be
maintained above and below the cabinet,
and 150 mm on right and left from other
units, cabinets, ceilings, cable ducts etc..
The solar inverter must be installed verti-
cally, so as not to hinder adequate free
convection.
Several solar inverters must not be instal-
led on top of each other, so as to prevent
reciprocal heating.

Electrical connection and cable entry
For installation, please observe the
instructions in the «Setup» leaflet!
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If the solar inverter is fixed to the installa-
tion frame, the electrical connection can
be led through. The unit may only be ope-
ned by a qualified electrician. The cabinet
cover must first be released and removed.
The SUB-D connector for the RS 232 con-
nection is located on the bottom, as well
as inlets for cables:
DC– DC– DC+ DC+
AC wiring loom
L1, N, L2, L3, PE
(Fig.) Inlets on the unit underside
Alarm relay
Irradiation sensor with
integrated temperature
sensor cable
RS 232
RS 485
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