String Combiner - VENSYS Elektrotechnik GmbH

PV modules must be connected parallel to the central inverter; The powerful and compact String Combiner by VENSYS Electronics GmbH serves this purpose. Whether indoors or outdoors, thanks to their efficient and robust design the boxes are easily installed stand for durability and maximum safety in the PV field.

The innovative and pre-installed monitoring system enables an optimal management of each solar module individually, thus achieving maximum output from your solar park.

The Highlights: SMART COMPACT ROBUST POWERFUL SAFE

Safe and efficient collection of up to 16 strings
Compact and robust housing for indoor and outdoor applications
Easy installation thanks to an optimised design and low weight
Innovative monitoring system
Excellent safety standard thanks to protective features and optimal monitoring
Operation at ambient temperatures from -20 °C to 45 °C
Support and spare parts available through licensed partners worldwide

Well thought-out down to the tiniest detail

ROBUST AND COMPACT

The robust housing ensures the protection against foreign matter and bad weather conditions with safety class IP55 or optionally IP65, at an operating temperature between -20 °C and +45 °C. In addition, the simple design and low weight allow for quick and easy installation and maintenance.

POWER AND CONNECTION

The VENSYS String Combiner offers 16 string inputs that are connected in pairs and can be operated with up to 150A as well as 1000V. All inputs are equipped with PV fuses (all poles) and are brought together on a load-break switch. The sealing range measures 22 to 36 millimeters, and cable cross-sections between 70 and 2 x 240 mm² are compatible.

CONTROL AND SAFETY

The innovative monitoring software safeguards that each module in the PV-field is monitored and analyzed precisely. Occurring errors in the strings are thus detected at an early stage, the corresponding string combiner is disconnected automatically from the inverter, while the rest of the system continues to operate and generate a valuable yield. A remarkably fast service is guaranteed through this accurate localization of errors. Therefore, downtimes are minimised, and a higher output can be generated. The collected operating data are transmitted to superordinate controllers for monitoring and analysis purposes. This transfer is carried out either through copper or fiber-optic technology.

TECHNICAL DATA

GENERAL	VENSYS String Combiner
Version	Outdoor Master / Slave
Principle	1 x Master with up to 8 x Slave
Switching voltage of switch disconnectors	230 V
Total weight	25 kg
Dimensions (WxDxH)	600 x 600 x 210 mm
Protection class	IP55 / IP56 (optional)
Housing material	Plastic

CONNECTIONS AC SECTION
Max. Number of Strings	16
Nominal voltage per String	1000 V
Max. input current per String	10 A
Cable cross section per string cable	4 - 6 mm²

CONNECTIONS DC SECTION
Max. output current	150 A
Cable connection	Tubular cable-lugs copper or alum., width max. 32 mm
Max. cable cross section to the inverter	2 x 240 mm²

MONITORING
Communication interface	Modbus RS 485
LWL	Optional
Current measurement (2 Strings each)	8 x 20 A
Monitoring switch disconnectors	Available
Supply voltage master box	24 V
Control voltage of switch disconnectors	230 V

ENVIRONMENT
Operating temperature range	-20.0 °C ...+45.0 °C
Storage temperature range	-20.0 °C ...+60.0 °C
Max. relative humidity	95,00 % (not condensing)
Max. installation height (altitude)	< 1.500 m (above sea level)

SAFETY AND APPROVAL
String fuses	All-pole PV-fuses 15 A 10 x 38 mm
String protection	Switch disconnectors with remote operator or manual
Overvoltage protection category	Type 2 acc. to SPD DIN EN 50539-11 with response
Compliance	IEC 61439-2

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