Solar

Operating photovoltaic systems safely with high availability

Grounded PV arrays

Solve the blind spot issue

Using a fuse on grounded solar arrays for ground-fault protection can create the "blind spot" issue - a ground fault on the already grounded conductor of a PV array may not drive sufficient current to trip the fuse. Additional faults can go undetected and may cause unexpected behavior, leading to a high risk of fire.

Bender's ground-fault relays detect low-level AC and DC ground faults on grounded arrays by using a differential measurement method, mitigating the blind spot issue. Advanced technology alerts technicians to conditions that may lead to damage to equipment or fire.

 

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PV power plants <= 50 kW

Electrical safety at home

In small photovoltaic systems, protection of the house residents and possible operators (fire department, chimney sweep) is very important. The inverters are mostly factory-equipped with the appropriate safety equipment. They are only safe enough if they can also detect symmetric faults caused by moisture and dirt. At the point of transfer between the internal network and the general power grid, the voltage and frequency must be checked at a predefined range.

 

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Network and system protection

Safe voltage and frequency levels

Before internal generation systems (photovoltaics, water power, CHP, biogas, etc.) can feed electrical energy into the public grid, an automatic switching point must be installed between the generation system and the low voltage network. This checks whether the frequency and voltage fed in are within the specified range. The three-phase voltage monitoring relay is used to pre-configure numerous standard specifications at the touch of a button.

 

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Downloads

NameCategorySizeLanguageTimestampD-/B-Number
Product Overview ISOMETER®/ISOSCAN® Product Overviews 5.3 MB EN2024/02/1616.02.2024
Renewable Energy Market Segment Brochures 4.3 MB EN2017/02/2727.02.2017
EDS309x Application Notes 1.4 MB EN2019/05/1313.05.2019D00012
Insulation Fault Location - Planning and Setup Technical Article 112.4 KB EN2019/05/1313.05.2019
Electrical Safety in Control and Auxiliary Circuits Technical Article 632.6 KB EN2019/05/1313.05.2019
Safe Connection to the Grid VMD460-NA Flyers 222.0 KB EN2019/05/1313.05.2019D00001
Operating Photovoltaic Installations Safely and Efficiently Technical Article 457.2 KB EN2019/05/1313.05.2019
The Largest Photovoltaic System in Latin America Technical Article 447.8 KB EN2019/05/1313.05.2019

Products

Measuring and monitoring relays

LINETRAXX® VMD460-NA
LINETRAXX® VMD460-NA

Network and system protection (NS protection) for monitoring the power infeed of power generation systems

Ground-Fault Monitoring, Ungrounded

ISOMETER® isoPV425 mit AGH420
ISOMETER® isoPV425 with AGH420

Ground-fault monitoring device for photovoltaic systems up to AC 690 V/DC 1000 V

Ground-Fault Location, Ungrounded

ISOSCAN® EDS30…
ISOSCAN® EDS3090 Series

Portable ground-fault location systems for ungrounded and grounded systems

Measuring and monitoring relays

LINETRAXX® VMD460-NA
LINETRAXX® VMD460-NA

Network and system protection (NS protection) for monitoring the power infeed of power generation systems

Details

Ground-Fault Monitoring, Ungrounded

ISOMETER® isoPV425 mit AGH420
ISOMETER® isoPV425 with AGH420

Ground-fault monitoring device for photovoltaic systems up to AC 690 V/DC 1000 V

Details

Ground-Fault Location, Ungrounded

ISOSCAN® EDS30…
ISOSCAN® EDS3090 Series

Portable ground-fault location systems for ungrounded and grounded systems

Details

Standards

CEI 0-21

Regola tecnica di riferimento per la connessione di Utenti attivi e passivi alle reti AT ed MT delle imprese distributrici di energia elettrica (Reference technical rules for the connection of active and passive consumers to the HV and MV electrical networks of distribution Company)

VDE-AR-N 4105

Anwendungsregel:2011-08 Erzeugungsanlagen am Niederspannungsnetz Technische Mindestanforderungen für Anschluss und Parallelbetrieb von Erzeugungsanlagen am Niederspannungsnetz

VDE-AR-N 4110

Anwendungsregel:2018-11 Technische Regeln für den Anschluss von Kundenanlagen an das Mittelspannungsnetz und deren Betrieb (TAR Mittelspannung)

C10/11

Specifieke technische aansluitingsvoorschriften voor gedecentraliseerde productie-installaties die in parallel werken met het distributienet

BDEW-Richtlinie 2008 einschl. Ergänzungen bis 01.2013
DIN VDE 0126-1-1/A1

Selbsttätige Schaltstelle zwischen einer netzparallelen Eigenerzeugungsanlage und dem öffentlichen Niederspannungsnetz (Norm wurde zurückgezogen und durch DIN VDE V 0126-1-1 ersetzt)

G59/2

Recommendations for the Connection of Generating Plant to the Distribution Systems of Licensed Distribution Network Operators

G59/3

Recommendations for the Connection of Generating Plant to the Distribution Systems of Licensed Distribution Network Operators

G83/2

Recommendations for the Connection of Type Tested Small-scale Embedded Generators (up to 16A per phase) in parallel with Low Voltage Distribution Systems

G83/3

Recommendations for the Connection of Type Tested Small-scale Embedded Generators (up to 16A per phase) in parallel with Low Voltage Distribution Systems

G99/1
G98/1
CEI 0-21 C10/11

Regola tecnica di riferimento per la connessione di Utenti attivi e passivi alle reti AT ed MT delle imprese distributrici di energia elettrica (Reference technical rules for the connection of active and passive consumers to the HV and MV electrical networks of distribution Company)

DIN V VDE V 0126-1-1

Selbsttätige Schaltstelle zwischen einer netzparallelen Eigenerzeugungsanlage und dem öffentlichen Niederspannungsnetz

BDEW
EN 61557-8

Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V – Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 8: Isolationsüberwachungsgeräte für IT-Systeme

DIN EN 60255-127

Messrelais und Schutzeinrichtungen - Teil 127: Funktionsnorm für Über-/Unterspannungsschutz 

Accionamiento y cintas de transporte

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