voltwerk electronics GmbH .:. VIS 540 S

Complete pre-assembled system

In addition to two central inverters from the Voltwerk VC WL series, a mean voltage switch gear and a mean voltage transformer, all the connection and ventilation devices that are required for the installation in the PV field as well as the Voltwerk SmartControl monitoring system are already pre-installed in the Voltwerk VIS 540. This complete system requires only minimum installation costs and therefore improves the return on investment of the solar power plant. The very high overall efficiency factor of 98% is achieved thanks to the highly efficient VC WL central inverters and the use of state-of-the-art technology within the mean voltage transformer.

Minimum planning, transport and installation costs

The basic inverter station is available in two different specifications, which differ only in the option either to retrofit a mean voltage switch gear or to have it installed ex factory.
The space for the switch gear is dimensioned in such a way that all common switch gears can be installed. In addition, the station provides room for a measuring transformer.

Optimised ventilation concept

The necessary ventilation system is pre-installed and specially tailored to the needs of the components. The generously dimensioned filter areas and special air outlet ports on the roof of the station allow for cooling regardless of the wind and weather conditions.

top

Components used
Inverters	2 x VC WL 300
Monitoring	SmartControl incl. accessories (e.g. CAN converter)
Medium voltage transformer	Three-phase current oil transformer 550 kVA
Auxiliary supply	Integrated transformer
Medium voltage switching device	Only VIS 540 S, standard Ormazabal GAE 630 (other options available)
Input values (PV generator)¹
Recommended DC output	600 kWp / 300 kWp per inverter
Maximum DC input voltage (V_dcmax)	965 V
Minimum DC input voltage (V_dcmin)	530 V
Maximum MPP voltage (V_mppmax)	780 V
Minimum MPP voltage (V_mppmin)	530 V
Maximum input current (I_pcmax)	1,132 A / 566 A per inverter
Number of inputs	5 per inverter / 10 total
Fuse per input	160 A
Connection design	Generator docking box with copper busbars, holes for M 12 bolts
Output data (grid)
Rated grid voltage (V_{ac, r})	20 kV
Rated power (P_{ac, r})	540 kVA
Rated frequency (f_r)	50 Hz
Maximum frequency (f_max)	52 Hz
Minimum frequency (f_min)	46.5 Hz
Cosphi at rated capacity	≥ 0.99
Distortion factor (at rated capacity)	≤ 2 %
Connections	L1, L2, L3
Rated current	15.88 A
Connection design	Porcelain bushing at the transformer in line with DIN 42530 // connections to the medium-voltage switching device, depending on type
System efficiency factor
Max. efficiency factor²	98.0 %
European efficiency factor²	97.2 %
Auxiliary supply
Standby power consumption³	≤ 200 W
Power consumption in operation³	≤ 3 kW (0.2 kW min. / 3 kW max.) - max. 0.6 % of P_nominal
Design of auxiliary supply	Integrated transformer with galvanic isolation 3-phases with 230 V / 400 V / 11 kVA (other options available)
Supply for customer devices	Two connections 16 A / 230 V / 50 Hz; protection type B, Fi 30 mA
Cooling
Cooling type	Air cooling, thermally controlled fan
Air volume required (inverter area)	7,500 m³/h
Type of air filter	Pocket filter in accordance with G3 EN 779
Filter surface	30 m²
Maximum counterpressure with additional station conversion	20 Pa in total for feed and exhaust air
Environmental / ambient conditions
Temperature range	– 20 °C / + 40 °C
Maximum temperature for permanent rated capacity	+ 40 °C
Relative humidity (non-condensing)	≤ 95 %
Installation altitude above sea level	≤ 2,000 m
Safety / protective equipment
Protection type	IP 54 in accordance with EN 60529
Earth fault monitoring	Yes, integrated in inverter
Surge arrester for PV input	Type II in accordance with DIN EN 61643-11 / -12 (other options available)
Isolation of PV generator from the grid	Galvanic isolation by means of the medium-voltage transformer
Medium-voltage transformer¹
Construction	Hermetic design with aluminium coils, three-coil galvanically isolated
Rated power	550 kVA
Cooling	ONAN
Charging	Dry and vented mineral oil
Tappings	20.5 kV / 20 kV / 19.5 kV / 19 kV / 18.5 kV
Vector group	Dyn11yn11
Short circuit voltage	≤ 6 %
No-load losses	290 VA (typical)
Grid monitoring
Grid monitoring	Integrated in the inverters, in accordance with VDE 0126-1-1⁴
System monitoring¹
Monitoring device	SmartControl with CAN converter
Sensor	Combined radiation and temperature sensor for installation on the PV generator
Communications	Ethernet / analog
Dimensions / Weight
Dimensions in mm (W x H x D)⁵	Station without MV switching device: 6,300 x 3,380 x 2,980 Station with MV switching device: 7,400 x 3,380 x 2,980
Weight of entire station	Station without MV switching device: 30 tons (typical) Station with MV switching device: 34 tons (typical)
Station design
Materials	wu lightweight concrete LC 25/28 in accordance with DIN 1045:2001-07
Exposition class for exterior parts	XC4, XF1, XA1 in accordance with DIN 1045:2001-07
Exposition class for interior parts	XC1 in accordance with DIN 1045:2001-07
Exterior walls	Washed-out concrete, granularity 8/16 (other options available)
Roof	Flat pan roof, telescopic design
Foundation trough	Oil-proof in accordance with § 19 WRA (metal oil pan optionally available)
Exhaust air hood	Aluminium, not assembled for transport
Air grilles / doors / frames	Hot-dip galvanised steel
Attachment points	4 x Deha anchors, type 20 T
Number of cable inputs	10
Type of cable inputs	Hauff system HSI 150
Earthing bushing	Hauff earthing bushing HEA-I-M12, with hot-dip galvanised M12 bolts and hot-dip galvanised truss head connectors
Other electrical equipment
Lighting	Fluorescent lamps in damp location design
Protection	RCD for individual electric circuits
Standards
Transient emissions (EMC)	DIN EN 61000-6-4:2007-09
Interference resistance (EMC)	DIN EN 61000-6-2:2006-03
Grid quality	DIN EN 61000-3-11:2001-04 DIN EN 61000-3-12:2005-09
Device safety (inverter)	DIN EN 50178:1998-04
CE conformity	Yes

1 Further information / details can be found in the data sheets for the individual components
2 Values when an external auxiliary supply is used
3 Varies depending on state of equipment, without medium-voltage transformer losses
4 Grid monitoring, which can be adjusted in VC WL 300, conforms to the VDE 0126-1-1; since the device's output voltage differs from the standard, however, this is not identified on the type plate. The document of compliance is available.
5 Height specification without exhaust air hoods. These should be mounted at the installation location.

VIS 540 (S) Bauart-Prüfung/Zertifizierung	Central Inverter Station	Certificate	MU	0912
VIS 540 (S)	Central inverter station	Manuale di servizio	IT	1005
VIS 540 Declaration of conformity	Inverter Station	Certificate	MU	0912
VIS 540 (S)	Central inverter station	Technisches Datenblatt	DE	1001
VIS 540 (S)	Central inverter station	Technical datasheet	EN	1001

top

VIS 540 S

Pre-assembled central inverter station with integrated mean voltage switch gear

Complete pre-assembled system

Minimum planning, transport and installation costs

Optimised ventilation concept