Operating power stations safely

Low voltage control circuits

High availability requires a reliable supply

Low voltage controls must be monitored for electrical safety 24/7. After all, an electrical fault will pose a significant risk in terms of downtime and can become a potential fire hazard. At the same time, sudden service intervention can be expensive and time consuming. For this reason, insurance bodies often request condition monitoring systems from their clients. Such a system, like the Bender ground fault monitoring and detection unit will provide a clear overview of the plants electrical health and provide all the relevant data needed for supervision and maintenance. 

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Offline monitoring for stand by equipment

Ready for operation?

Continuous ground-fault monitoring of de-energized loads plays a decisive role in damage prevention. Crane systems, fire extinguisher pumps, pusher drives, etc. are often only used occasionally or in an emergency - but that is exactly when they need to work flawlessly. Bender offline ISOMETER®s permanently monitor de-energized systems, reporting ground faults early and thus providing perfect protection against critical situations. 

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Voltage monitoring in three phase power systems

The VMD258 analog voltage relay monitors three phase AC systems for under and over voltages (window function) It’s internals are based on analog technology and omit the use of a microprocessor, which makes this relay suitable for nuclear and some demanding military applications. The auxiliary voltage supply can be derived from the system to be monitored. Both, system and supply are separated by a dual layer of insulation for additional internal safety and reliability. Special filter chokes dampen potential electronic noise stemming from the monitored power system. The response values for under and overvoltage and also for time response delays can be adjusted to varying levels.

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Downloads

NameCategorySizeLanguageTimestampD-/B-Number
EDS309x Datasheets 717.2 KB EN2019/05/1313.05.2019D00012
Power Quality/Measuring and monitoring relays Product Overviews 2.7 MB EN2022/05/2525.05.2022
Product Overview ISOMETER®/ISOSCAN® Product Overviews 5.3 MB EN2024/02/1616.02.2024
Product Overview - Residual Current Monitoring Product Overviews 6.2 MB EN2023/11/0909.11.2023
Power Quality Flyers 468.0 KB EN2022/12/1414.12.2022
Power Plants Market Segment Brochures 3.8 MB EN2021/04/1515.04.2021
Insulation Fault Location - Planning and Setup Technical Article 112.4 KB EN2019/05/1313.05.2019
Why the IT System is Often the Best Choice for Power Supply Systems of All Types Technical Article 3.0 MB EN2019/07/1111.07.2019
Where Residual Current Technology Meets the IT System Technical Article 353.8 KB EN2019/05/1313.05.2019
Offline Monitoring Flyers 1.7 MB EN2019/05/1313.05.2019
Electrical Safety in Control and Auxiliary Circuits Technical Article 632.6 KB EN2023/04/2121.04.2023

Products

Measuring and monitoring relays

LINETRAXX® VMD258
LINETRAXX® VMD258

Undervoltage/overvoltage relay for monitoring three-phase AC systems (window discriminator function)

Ground-Fault Monitoring, Ungrounded

ISOMETER® iso685…
ISOMETER® iso685 Series

Ground-fault detector for ungrounded AC/DC systems

ISOMETER® IR425-D4
ISOMETER® IR425-D4

Ground-fault monitoring device for ungrounded AC/DC control circuits

Ground-Fault Location, Ungrounded

ISOSCAN® EDS440
ISOSCAN® EDS440 Series

Ground-fault location module for ungrounded AC/DC systems

ISOSCAN® EDS441
ISOSCAN® EDS441

Ground-fault locator for localization of ground faults in control circuits

ISOSCAN® EDS460-D
ISOSCAN® EDS460-D

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

ISOSCAN® EDS461-D
ISOSCAN® EDS461-D

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

ISOSCAN® EDS460-L
ISOSCAN® EDS460-L

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

ISOSCAN® EDS461-L
ISOSCAN® EDS461-L

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

ISOSCAN® EDS490-D
ISOSCAN® EDS490-D

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

ISOSCAN® EDS491-D

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

ISOSCAN® EDS490-L
ISOSCAN® EDS490-L

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

ISOSCAN® EDS491-L
ISOSCAN® EDS491-L

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

ISOSCAN® EDS460-DG
ISOSCAN® EDS460-DG

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

ISOSCAN® EDS30…
ISOSCAN® EDS3090 Series

Portable ground-fault location systems for ungrounded and grounded systems

ISOSCAN® EDS150
ISOSCAN® EDS150

Ground-fault locator with 6 integrated measuring current transformers for localization of ground faults in main circuits

ISOSCAN® EDS151
ISOSCAN® EDS151

Ground-fault locator with 6 integrated measuring current transformers for localization of ground faults in control circuits

Ground-Fault Monitoring for Grounded Systems

LINETRAXX® SmartDetect RCMS410

Four-channel DC, AC and pulse current sensitive residual current monitor for earthed AC, AC/DC and DC systems

LINETRAXX® RCMS460-D
LINETRAXX® RCMS460-D Blindspot®

Multi-channel AC/DC ground-fault monitor

LINETRAXX® RCMS460-L
LINETRAXX® RCMS460-L Blindspot®

Multichannel AC, pulsed DC and AC/DC sensitive ground-fault monitor

LINETRAXX® RCMS490-D
LINETRAXX® RCMS490-D Blindspot®

Multi-channel AC/DC ground-fault monitor with individual relay outputs

LINETRAXX® RCMS490-L
LINETRAXX® RCMS490-L Blindspot®

Multichannel AC, pulsed DC and AC/DC sensitive ground-fault monitor with one alarm contact per channel

Power Quality

LINETRAXX® PEM353

Universal measuring device with numerous measured quantities, energy and power measurement with storage, Power Quality Monitoring, limit value monitoring with alarm forwarding

System Components

AGH150W-4
AGH150

Extension of the nominal voltage range of ISOMETER® iso685… series to AC 0…1150 V, DC 0…1760 V

AGH204S-4
AGH204S-4

Extension of the nominal voltage range of ISOMETER® iso685 series to AC, 3(N)AC 0...1650/0...1300 V

AGH520S
AGH520S

Extension of the nominal voltage range of ISOMETER® to AC 0...7200 V

AGH676S-4
AGH676S-4

Extension of the nominal voltage range of ISOMETER® iso685.../IR420-D64 series to AC 0...12 kV

Measuring and monitoring relays

LINETRAXX® VMD258
LINETRAXX® VMD258

Undervoltage/overvoltage relay for monitoring three-phase AC systems (window discriminator function)

Details

Ground-Fault Monitoring, Ungrounded

ISOMETER® iso685…
ISOMETER® iso685 Series

Ground-fault detector for ungrounded AC/DC systems

Details
ISOMETER® IR425-D4
ISOMETER® IR425-D4

Ground-fault monitoring device for ungrounded AC/DC control circuits

Details

Ground-Fault Location, Ungrounded

ISOSCAN® EDS440
ISOSCAN® EDS440 Series

Ground-fault location module for ungrounded AC/DC systems

Details
ISOSCAN® EDS441
ISOSCAN® EDS441

Ground-fault locator for localization of ground faults in control circuits

Details
ISOSCAN® EDS460-D
ISOSCAN® EDS460-D

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

Details
ISOSCAN® EDS461-D
ISOSCAN® EDS461-D

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

Details
ISOSCAN® EDS460-L
ISOSCAN® EDS460-L

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

Details
ISOSCAN® EDS461-L
ISOSCAN® EDS461-L

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

Details
ISOSCAN® EDS490-D
ISOSCAN® EDS490-D

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

Details
ISOSCAN® EDS491-D

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

Details
ISOSCAN® EDS490-L
ISOSCAN® EDS490-L

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

Details
ISOSCAN® EDS491-L
ISOSCAN® EDS491-L

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

Details
ISOSCAN® EDS460-DG
ISOSCAN® EDS460-DG

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

Details
ISOSCAN® EDS30…
ISOSCAN® EDS3090 Series

Portable ground-fault location systems for ungrounded and grounded systems

Details
ISOSCAN® EDS150
ISOSCAN® EDS150

Ground-fault locator with 6 integrated measuring current transformers for localization of ground faults in main circuits

Details
ISOSCAN® EDS151
ISOSCAN® EDS151

Ground-fault locator with 6 integrated measuring current transformers for localization of ground faults in control circuits

Details

Ground-Fault Monitoring for Grounded Systems

LINETRAXX® SmartDetect RCMS410

Four-channel DC, AC and pulse current sensitive residual current monitor for earthed AC, AC/DC and DC systems

Details
LINETRAXX® RCMS460-D
LINETRAXX® RCMS460-D Blindspot®

Multi-channel AC/DC ground-fault monitor

Details
LINETRAXX® RCMS460-L
LINETRAXX® RCMS460-L Blindspot®

Multichannel AC, pulsed DC and AC/DC sensitive ground-fault monitor

Details
LINETRAXX® RCMS490-D
LINETRAXX® RCMS490-D Blindspot®

Multi-channel AC/DC ground-fault monitor with individual relay outputs

Details
LINETRAXX® RCMS490-L
LINETRAXX® RCMS490-L Blindspot®

Multichannel AC, pulsed DC and AC/DC sensitive ground-fault monitor with one alarm contact per channel

Details

Power Quality

LINETRAXX® PEM353

Universal measuring device with numerous measured quantities, energy and power measurement with storage, Power Quality Monitoring, limit value monitoring with alarm forwarding

Details

System Components

AGH150W-4
AGH150

Extension of the nominal voltage range of ISOMETER® iso685… series to AC 0…1150 V, DC 0…1760 V

Details
AGH204S-4
AGH204S-4

Extension of the nominal voltage range of ISOMETER® iso685 series to AC, 3(N)AC 0...1650/0...1300 V

Details
AGH520S
AGH520S

Extension of the nominal voltage range of ISOMETER® to AC 0...7200 V

Details
AGH676S-4
AGH676S-4

Extension of the nominal voltage range of ISOMETER® iso685.../IR420-D64 series to AC 0...12 kV

Details

Standards

DIN EN 60255-1 VDE 0435-300

Messrelais und Schutzeinrichtungen - Teil 1: Allgemeine Anforderungen

DIN EN 60255-127 VDE 0435-3127

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

DIN VDE 0100-731

Errichten von Niederspannungsanlagen - Teil 7-731: Anforderungen für Betriebsstätten, Räume und Anlagen besonderer Art – Abgeschlossene elektrische Betriebsstätten

EN 61557-9

Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V – Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 9: Einrichtungen zur Isolationsfehlersuche in IT-Systemen

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

EN 61557-15

Elektrische Sicherheit in Niederspannungsnetzen bis 1000 V AC und 1500 V DC - Geräte zum Prüfen, Messen oder Steuern von Schutzsystemen - Teil 15: Anforderungen an die funktionale Sicherheit von Isolationssteuergeräten in IT-Systemen und Geräten zur Erkennung von Isolationsfehlern in IT-Systemen

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