Vacon NXV0010, NX 8000 Solar Series, NXV0030, NXV0040, NXV0015 User Manual

user's manual

3-phase photovoltaic inverters for

connection to mains supply

drives nxv0010 to nxv0100

2 • vacon

CONTENTS

Document code: DPD00426A

Version release date: 25.8.2011

1. SAFETY .......................................................................................................................3

1.1 Danger and warning symbols used in this manual ........................................................ 3

1.2 Symbols and warning marks used in the product .......................................................... 3

1.3 Safety rules ..................................................................................................................... 3

1.4 Earthing and earth fault protection ................................................................................ 4

2. TECHNICAL SPECIFICATIONS ....................................................................................6

2.1 Inverter ratings ............................................................................................................... 6

2.2 Technical data ................................................................................................................. 6

3. RECEIPT OF DELIVERY ...............................................................................................7

3.1 Type designation code ..................................................................................................... 7

3.2 Lifting the unit out of the transport packaging ............................................................... 7

3.3 Storage ............................................................................................................................ 8

3.4 Maintenance .................................................................................................................... 9

3.5 Warranty .......................................................................................................................... 9

4. INSTALLATION ......................................................................................................... 10

4.1 Free space around the cabinet ..................................................................................... 12

4.2 Fixing the unit................................................................................................................ 13

5. ELECTRICAL CONNECTION ...................................................................................... 15

5.1 Electrical diagrams ....................................................................................................... 15

5.2 Cabling .......................................................................................................................... 17

5.3 Control connections ...................................................................................................... 22

5.4 Option board OPTC2 (RS-485) ....................................................................................... 29

5.5 Option board OPTD7 (Line voltage measurement board) ............................................. 30

5.6 Fuse selection ............................................................................................................... 32

6. START UP ................................................................................................................. 33

6.1 Inverter control keypad ................................................................................................. 34

7. MAINTENANCE AND TROUBLESHOOTING ............................................................... 39

7.1 Maintenance .................................................................................................................. 39

7.2 Troubleshooting ............................................................................................................ 40

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1. SAFETY

1.1 Danger and warning symbols used in this manual

This manual contains clearly marked cautions and warnings which are intended for your personal
safety and to avoid any unintentional damage to the product or connected appliances.

Please read the information included in cautions and warnings carefully.

The cautions and warnings are marked as follows:

=

Dangerous voltage! Risk of electric shock

=

General warning! Risk of equipment damage

1.2 Symbols and warning marks used in the product

The product carries some additional symbols and marks. The meanings of these are as follows:

=

Dangerous voltage! Risk of electric shock

i

= See User’s Manual

5

min

= Caution! Risk of electric shock! Energy storage timed discharge:

5 minutes

1.3 Safety rules

ONLY A COMPETENT ELECTRICIAN IS ALLOWED TO CARRY OUT THE ELECTRICAL IN­STALLATION! RISK OF ELECTRIC SHOCK!

The solar inverter VACON 8000 SOLAR has been designed to be installed in enclosed places. It shall
be protected against harsh weather conditions.

The solar inverter VACON 8000 SOLAR can only be opened by qualified technicians. Inside the inver­ter module, there is no element which can be fixed or adjusted by the user.

There is a serious risk of electric shock, even after the device has been disconnected

from the mains supply or

solar panels. This electric shock may cause death or serious

injury.
If the short circuit current of the grid is higher than the short circuit withstanding ca­pability of the QA2, additional circuit breaker must be installed. If the possible short
circuit current at the grid point of connection is higher than the solar inverter’s break­ing capacity, additional current limiting device must be installed (see chapter 5.4).

If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.

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Even when the solar inverter has been disconnected from mains and solar panels, wait until the con­trol panel switches off. After this, it is recommended that you wait at least 5 minutes before opening,
and /or making any kind of alteration or connection to, the device.

Check that there is no voltage present before handling and performing any kind of work on the de­vice. To verify the absence of voltage, type III measurement elements (1000 volts) must be used.

Do not perform any measurement or test when the VACON 8000 SOLAR is connected to mains or so­lar panels.

Do not perform any kind of dielectric strength test on the VACON 8000 SOLAR. Unless the appropri­ate process is followed, performing this test may damage the inverter module.

Appropriate personal protective equipment (PPEs) must be used:

 Helmet
 Safety goggles for electrical risk
 Safety footwear
 Electrically resistant gloves adequate for the voltage
 Protective gloves against mechanical risk

Access to the photo-voltaic field is strictly prohibited!

1.4 Earthing and earth fault protection

CAUTION!

The Vacon 8000 Solar inverter must always be earthed with an earthing conductor connected to the

earthing terminal marked with

.

The touch current of Vacon 8000 Solar exceeds 3.5mA AC. According to EN62109-1, one or more of
the following conditions for the associated protective circuit shall be satisfied:

A fixed connection and

a) the

protective earthing conductor

shall have a cross-sectional area of at least 10 mm2 Cu or

16 mm

2

Al.

or

b) an automatic disconnection of the supply in case of discontinuity of the

protective earthing

conductor

. See chapter 4.

or

c) provision of an additional terminal for a second

protective earthing conductor

of the same

cross-sectional area as the original

protective earthing conductor

.

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Cross-sectional area of phase conductors

(S)

[mm2]

Minimum cross-sectional area of the cor-

responding

protective earthing conductor

[mm2]

S ≤ 16

16 <

S ≤ 35

35 <

S

S

16

S/2

The values above are valid only if the protective earthing conductor is made of the same metal as

the phase conductors. If this is not so, the cross-sectional area of the protective earthing con­ductor shall be determined in a manner which produces a conductance equivalent to that which
results from the application of this table.

The cross-sectional area of every protective earthing conductor which does not form a part of the
supply cable or cable enclosure shall, in any case, be not less than

• 2.5 mm

2

if mechanical protection is provided or

• 4 mm

2

if mechanical protection is not provided. For cord-connected equipment, provisions
shall be made so that the protective earthing conductor in the cord shall, in the case of failure
of the strain-relief mechanism, be the last conductor to be interrupted.

However, always follow the local regulations for the minimum size of the protective earthing con­ductor.

NOTE: Due to the high capacitive currents present in the AC drive, fault current protective switches

may not function properly.

Do not perform any voltage withstand tests

on any part of Vacon 8000 Solar.
There is a certain procedure according to which the tests shall be performed.
Ignoring this procedure may result in damaged product.

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2. TECHNICAL SPECIFICATIONS

2.1 Inverter ratings

Range of input voltages 340-800Vcc, 50 Hz, 3~

Inverter

type

Nom. output

power

[kW]

Recommended

max PV power

[kW]

Max al-

lowed PV

power

[A]

Max effi-

ciency [%]

Power con-

sumption at

night

[W]

Inverter

dimensions

[mm]

Inverter

weight

[kg]

NXV0010 10 12 50 >94% <5 600x1481x600 220
NXV0015 15 18.5 50 >94%

<5 600x1481x600 220

NXV0020 20 24 99 >94%

<5 600x1481x600 300

NXV0025 25 30 99 >94%

<5 600x1481x600 300

NXV0030 30 36 99 >94%

<5 600x1481x600 300
NXV0040 40 48 198 >95% <30 800x1881x600 550
NXV0050 50 60 198 >96%

<30 800x1881x600 550

NXV0080 80 96 353 >96%

<30 800x2281x600 850

NXV0100 100 120 353 >96%

<30 800x2281x600 850

Table 2-1. Power ratings, dimensions and weights

2.2 Technical data

DC Input

Range of input voltages 340...800 VDC
Maximum input voltage 900 VDC

AC Output

Mains voltage 3*400 ± 10%
Galvanic isolation For each isolator transformer attached
Frequency 50/60 Hz ± 0,5%

Cos

φ

>0.99, for output 20%-100% of Pn

Harmonic distortion < 2.5% for output > 30% of power
Consumption at night < 5W (NXV0010...NXV0030); <30 W (NXV0040...NXV0100)
Maximum efficiency > 94...96%
Ambient temperature -10...+40°C; 1-% derating for each degree up to 50°C required

Relative humidity

< 95% no condensation

Protection IP21
Display

Alfanumeric display per unit with two lines of 14 characters, leds

indicating functioning, plus fault and function push buttons.
Signalling 3 potential free contacts to indicate faults and alarms
Communications May include one of the following communication buses as an op-

tional feature: Modbus RTU, Ethernet (Modbus/TCP), RS485, GPRS,

string and inverter monitoring

May include a monitoring system with http-access as an optional

feature.
IEC61000-3-3 For the product to meet the technical requirements of IEC 61000-3-

3, the supply should have a system impedance accordingly:

≤ NXV0015: Zsys = 0.105 ohm

≤ NXV0030: Zsys = 0.270 ohm

≤ NXV0050: Zsys = 0.176 ohm

≤ NXV0100: Zsys = 0.136 ohm

Ambient condi­tions

Altitude Max. 2,000m
Environmental category Indoor, conditioned
Pollution degree PD2

Overvoltage
category

AC (Mains) OVCIII
DC (Panels) OVCII

Table 2-2. Technical data

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3. RECEIPT OF DELIVERY

3.1 Type designation code

Vacon 8000 Solar inverters have undergone scrupulous tests and quality checks at the factory before
they are delivered to the customer. However, after unpacking the product, check that no signs of
transport damages are to be found on the product and that the delivery is complete (compare the
type designation of the product to the code below).

VACON NXV 0010 4 A 2 L A1A2 D700XX

nk3_1b_solar.ai

Vacon NXV = Solar power inverter

Nominal power

0010 = 10 kW, 0100 = 100 kW etc.

4 = Galvanic isolation transformer, ouptut 3 x 400 VAC

Control keypad and display on the cabinet door:

A = standard (alpha-numeric)
B = no local control keypad
F = dummy keypad
G = graphic display

Enclosure class:

2 = IP21/NEMA 1

EMC emission level:

L = fulfils requirements of category C3 of standard EN61800-3 (2004),

2nd environment and rated voltage less than 1000V

T = fulfils standard EN61800-3 (2004) when used in IT networks

Option boards; each slot is represented by two characters where:

A = basic I/O board, B = expander I/O board,
C = fieldbus board, D = special board, 00 = Not used

Figure 3-1. Type designation code

3.2 Lifting the unit out of the transport packaging

Before unpacking the device, check the correctness of delivery by comparing your order data to the
drive information found on the package label.

The unit is delivered either in a wooden box or a wooden cage. The box may be transported either
horizontally or vertically, while transportation of the cage in a horizontal position is not allowed. Al­ways refer to shipping marks for more detailed information. To lift the unit out of the box, use lifting
equipment capable of handling the weight of the cabinet.

There are lifting lugs on the top of the cabinet and these lugs can be used to lift the cabinet into an
upright position and to move it to the place needed.

Units NXV 0010 and NXV0100 may be lifted as shown in Figure 3-2, in vertical or horizontal position.

8 • vacon RECEIPT OF DELIVERY

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Min 60°

Min 60°

Min 60°

Figure 3-2. Lifting unit cabinet

After unpacking the product, check that no signs of transport damages are to be found on the prod­uct and that the delivery is complete.

If the delivery does not correspond to your order, contact the supplier immediately.

Should the drive have been damaged during the shipping, please contact primarily the cargo insur­ance company or the carrier.

If the equipment has been damaged, do not install it.

Keep the original packaging in case it is necessary to return the equipment to the manufacturer.
Otherwise recycle the packaging material according to local regulations.

3.3 Storage

If the inverter is to be kept in store before use make sure that the ambient conditions are acceptable:

Storing temperature –40…+70

°C

Relative humidity <95%, no condensation

The environment should also be free from dust. If there is dust in the air the inverter should be well
protected to make sure dust does not get inside it.

If the inverter is to be stored during longer periods the power should be connected to the inverter
once in 24 months and kept on for at least 2 hours. If the storage time exceeds 24 months the elec­trolytic DC capacitors need to be charged with caution. Therefore, such a long storage time is not
recommended.

If the storing time is much longer than 24 months, the recharging of the capacitors has to be carried
out so that the possible high leakage current through the capacitors is limited. The best alternative
is to use a DC-power supply with adjustable current limit. The current limit has to be set for example

RECEIPT OF DELIVERY vacon • 9

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to 300…500mA and the DC-power supply has to be connected to the B+/B- terminals (DC supply
terminals).

DC-voltage must be adjusted to nominal DC-voltage level of the unit (1.35*Un AC) and supplied at
least for 1 hour.

If DC-voltage is not available and the unit has been stored de-energized much longer than 1 year
consult factory before connecting power.

3.4 Maintenance

In normal conditions, Vacon NX 8000 Solar inverters are maintenance-free. However, we recom­mend to keep the inverter clean, e.g. by cleaning the heatsink with compressed air whenever neces­sary.

We also recommend to follow proactive maintenance schedule below to ensure the highest possible
utilization rate of the cabinet drive.

Maintenance interval Maintenance action

12 months (if unit stored)

• Reform capacitors (see separate instruction)

6-24 months

(depending on environment)

• Check I/O terminals

• Check tightness of mains connection (e.g. with

thermography)

• Clean cooling tunnel

• Check operation of cooling fan, check for cor-

rosion on terminals, busbars and other surfaces

5-7 years

• Change cooling fans:

- main fan

-

fan of the LCL filter

5-10 years

• Change DC bus capacitors if DC voltage ripple

is high

Table 3-1. Proactive maintenance schedule

3.5 Warranty

Only manufacturing defects are covered by the warranty. The manufacturer assumes no responsibil­ity for damages caused during or resulting from transport, receipt of the delivery, installation, com­missioning or use.

The manufacturer shall in no event and under no circumstances be held responsible for damages
and failures resulting from misuse, wrong installation, unacceptable ambient temperature, dust,
corrosive substances or operation outside the rated specifications.

Neither can the manufacturer be held responsible for consequential damages.

The Manufacturer's standard time of warranty is 18 months from the delivery or 12 months from the
commissioning whichever expires first (Vacon Warranty Terms).

The local distributor may grant a warranty time different from the above. This warranty time shall be
specified in the distributor's sales and warranty terms. Vacon assumes no responsibility for any oth­er warranties than that granted by Vacon itself.

In all matters concerning the warranty, please contact first your distributor.

10 • vacon INSTALLATION

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4. INSTALLATION

The installation of the VACON 8000 SOLAR solar inverter may only be carried out by a qualified tech­nician who fully understands the safety and installation instructions included in this manual.

The IP21 protection of the VACON 8000 SOLAR inverter only allows for installation in enclosed places.
Note the locations of some essential components of the inverters in pictures below:

PE terminals
(8 pcs)

Opening for
cables

DC+ terminals

DC- terminals

PE busbar

L1, L2, L3

Control unit

RFI filter

Figure 4-1. Pricipal drawing of inverter modules NXV0010 to NXV0030 with some essential components

INSTALLATION vacon • 11

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DC switch

DC switch

DC- terminals

DC+ terminals

PE busbar

AC switch

AFE unit

Control
unit

L1, L2, L3

Opening for
cables

PE terminals
(8 pcs)

AC switch

Emergency
stop

Figure 4-2. Pricipal drawing of inverter modules NXV0040 and NXV0100 with some essential components

Due to the heavy weight of the device, it must be placed on a firm and horizontal surface.

The equipment has to be installed in a place where the room temperature is between -10ºC and
+40ºC. Lower temperatures prevent the equipment from starting up and higher temperatures limit
the output power.
The buzzing noise occurring during the operation of the equipment is normal. Do not install the
equipment in an occupied dwelling.

NOTE:

It is important to prevent small particles falling onto the device. Small particles

may enter the equipment through the ventilation grids and damage the equipment.

Do not block the ventilation grids.

Unit must be installed on non-flammable ground.

The unit is not intended for wet location.

12 • vacon INSTALLATION

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4.1 Free space around the cabinet

Enough space must be left above, behind and in front of the cabinet to ensure sufficient cooling and
space for maintenance.
The amount of cooling air required is indicated in the table below. Also make sure that the tempera­ture of the cooling air does not exceed the maximum ambient temperature of the inverter.

200 mm

800 mm

25 mm

Figure 4-3. Space to be left free above (left) and in front of (right) the cabinet.

Type

Cooling air required

[m3/h)

NXV0010

300

NXV0015

300

NXV0020

425

NXV0025

425

NXV0030

425

NXV0040

700

NXV0050

700

NXV0080

800

NXV0100

800

Table 4-1. Required cooling air

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4.2 Fixing the unit

The cabinet can be fixed to the floor alone or to the floor and the back wall.

4.2.1

Fixing the unit to floor alone

For the floor-only-mounting, the fixing points in all four bottom corners of the cabinet shown in Fig­ure 4-4 below must be used.

BOTTOM VIEW

FRONT

REAR

Figure 4-4. Fixing the cabinet to the floor only

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4.2.2

Fixing the unit to floor and wall

For additional stability, the cabinet can also be mounted to the floor and the back wall. To accom­plish this, follow this procedure:

1. On the bottom of the cabinet, remove the screws of the rear iron clamp. Flip it and refix the

screws as shown in

Figure 4-5.

2. Then bolt the cabinet to the floor at the fixing points on the bottom front side, see Figure 4-5.

BOTTOM VIEW

FRONT

REAR

Rear iron clamp

Figure 4-5.

3. Use the fixing points at the top rear side of the cabinet to bolt it to the back wall. See Figure 4-6.

TOP VIEW

REAR

FRONT/TOP VIEW

FRONT

Figure 4-6.

Welding of the cabinet might risk sensitive components in the converter.
Ensure that no grounding currents can flow through any part of the converter.