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.
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.
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.
| Name | Category | Size | Language | Timestamp | D-/B-Number |
|---|---|---|---|---|---|
| EDS309x | Datasheets | 717.2 KB | EN | 2019/05/1313.05.2019 | D00012 |
| Power Quality/Measuring and monitoring relays | Product Overviews | 2.7 MB | EN | 2022/05/2525.05.2022 | |
| Product Overview ISOMETER®/ISOSCAN® | Product Overviews | 5.3 MB | EN | 2024/02/1616.02.2024 | |
| Product Overview - Residual Current Monitoring | Product Overviews | 6.3 MB | EN | 2024/10/2929.10.2024 | |
| Power Quality | Flyers | 468.0 KB | EN | 2022/12/1414.12.2022 | |
| Power Plants | Market Segment Brochures | 5.2 MB | EN | 2024/03/0606.03.2024 | |
| Insulation Fault Location - Planning and Setup | Technical Article | 112.4 KB | EN | 2019/05/1313.05.2019 | |
| Why the IT System is Often the Best Choice for Power Supply Systems of All Types | Technical Article | 3.0 MB | EN | 2019/07/1111.07.2019 | |
| Where Residual Current Technology Meets the IT System | Technical Article | 353.8 KB | EN | 2019/05/1313.05.2019 | |
| Offline Monitoring | Flyers | 1.7 MB | EN | 2019/05/1313.05.2019 |
Products
Undervoltage/overvoltage relay for monitoring three-phase AC systems (window discriminator function)
Ground-fault detector for ungrounded AC/DC systems
Ground-fault monitoring device for ungrounded AC/DC control circuits
Ground-fault location module for ungrounded AC/DC systems
Ground-fault locator for localization of ground faults in control circuits
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
Ground-fault locator with 6 integrated measuring current transformers for localization of ground faults in main circuits
Ground-fault locator with 6 integrated measuring current transformers for localization of ground faults in control circuits
Portable ground-fault location systems for ungrounded and grounded systems
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
Four-channel DC, AC and pulse current sensitive residual current monitor for earthed AC, AC/DC and DC systems
Multi-channel AC/DC ground-fault monitor
Multichannel AC, pulsed DC and AC/DC sensitive ground-fault monitor
Multi-channel AC/DC ground-fault monitor with individual relay outputs
Multichannel AC, pulsed DC and AC/DC sensitive ground-fault monitor with one alarm contact per channel
Universal measuring device with numerous measured quantities, energy and power measurement with storage, Power Quality Monitoring, limit value monitoring with alarm forwarding
Extension of the nominal voltage range of ISOMETER® iso685… series to AC 0…1150 V, DC 0…1760 V
Extension of the nominal voltage range of ISOMETER® iso685 series to AC, 3(N)AC 0...1650/0...1300 V
Extension of the nominal voltage range of ISOMETER® to AC 0...7200 V
Extension of the nominal voltage range of ISOMETER® iso685.../IR420-D64 series to AC 0...12 kV
Undervoltage/overvoltage relay for monitoring three-phase AC systems (window discriminator function)
Ground-fault detector for ungrounded AC/DC systems
Ground-fault monitoring device for ungrounded AC/DC control circuits
Ground-fault location module for ungrounded AC/DC systems
Ground-fault locator for localization of ground faults in control circuits
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
Ground-fault locator with 6 integrated measuring current transformers for localization of ground faults in main circuits
Ground-fault locator with 6 integrated measuring current transformers for localization of ground faults in control circuits
Portable ground-fault location systems for ungrounded and grounded systems
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.
Four-channel DC, AC and pulse current sensitive residual current monitor for earthed AC, AC/DC and DC systems
Multi-channel AC/DC ground-fault monitor
Multichannel AC, pulsed DC and AC/DC sensitive ground-fault monitor
Multi-channel AC/DC ground-fault monitor with individual relay outputs
Multichannel AC, pulsed DC and AC/DC sensitive ground-fault monitor with one alarm contact per channel
Universal measuring device with numerous measured quantities, energy and power measurement with storage, Power Quality Monitoring, limit value monitoring with alarm forwarding
Extension of the nominal voltage range of ISOMETER® iso685… series to AC 0…1150 V, DC 0…1760 V
Extension of the nominal voltage range of ISOMETER® iso685 series to AC, 3(N)AC 0...1650/0...1300 V
Extension of the nominal voltage range of ISOMETER® to AC 0...7200 V
Extension of the nominal voltage range of ISOMETER® iso685.../IR420-D64 series to AC 0...12 kV
Messrelais und Schutzeinrichtungen - Teil 1: Allgemeine Anforderungen
Messrelais und Schutzeinrichtungen - Teil 127: Funktionsnorm für Über-/Unterspannungsschutz
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
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
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
Errichten von Niederspannungsanlagen - Teil 7-731: Anforderungen für Betriebsstätten, Räume und Anlagen besonderer Art – Abgeschlossene elektrische Betriebsstätten
