Operating power stations safely

Control voltage circuit

High availability requires a reliable supply

[] Steuerspannungskreis

Control voltage circuits must be monitored for electrical safety; after all, an undetected electrical fault is as significant as unexpected system downtime and also significantly increases the fire risk. At the same time, unplanned service interventions can be expensive and time-consuming. Some power plant insurers also demand effective condition monitoring systems. The Bender condition monitoring system gives you a clear overview of all the relevant data for your system.

Product overview ISOMETER®
Product overview Residual current monitoring
Product overview Power Quality
Flyer Power Quality
Application Note EDS309x
Technical paper Insulation fault location - Planning and set up in the solar charging station at the University of Applied Sciences Bingen
Technical paper Electrical safety in control and auxiliary circuits
Technical paper Where residual current technology meets the IT system
DIN VDE 0100-731
Errichten von Niederspannungsanlagen - Teil 7-731: Anforderungen für Betriebsstätten, Räume und Anlagen besonderer Art – Abgeschlossene elektrische Betriebsstätten

Rotor monitoring

Safe monitoring of rotating parts

[] Rotor-Überwachung

All kinds of power plant use generators which convert mechanical energy into electrical energy. Therefore, operating them reliably is crucial for a functional energy supply. All insulation in electrical machines is subject to ageing processes. Permanent insulation monitoring can determine the condition of the insulation of your machine. This protects you from surprises. The contacting is either direct (stator) or via collector rings (rotor). Potential problems and risks can easily be recognised. For example, the excitation system is causing high levels of harmonics which generate incorrect readings in many conventional insulation measuring devices. An ISOMETER® from Bender considers these problems during insulation measurement.

Product overview ISOMETER®
Technical paper Why the IT system is often the best choice

Recommended systems for insulation monitoring:

Recommended coupling devices:

DIN VDE 0100-731
Errichten von Niederspannungsanlagen - Teil 7-731: Anforderungen für Betriebsstätten, Räume und Anlagen besonderer Art – Abgeschlossene elektrische Betriebsstätten

De-energised loads

Ready for operation?

[] Abgeschaltete Verbraucher

Continuous insulation monitoring of de-energised 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-energised systems, reporting insulation faults early and thus providing perfect protection against critical situations. 

Flyer Offline Monitoring

Recommended systems for insulation monitoring:

EN 61557-8
Electrical safety in low voltage distribution systems up to 1 000 v a.c. and 1 500 v d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 8: Insulation monitoring devices for IT Systems

EN 61557-9
Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 9: Equipment for insulation fault location in IT Systems

EN 61557-15
Electrical safety in low voltage distribution systems up to 1000 V ac and 1500 V dc - Equipment for testing, measuring or monitoring of protective measures - Part 15: Functional safety requirements for insulation monitoring devices in IT systems and equipment for insulation fault location in IT systems

Voltage monitoring

Monitoring of three-phase AC systems

[] VMD258

The VMD258 analogue voltage relay monitors three-phase AC systems for under and overvoltage (window function). It does not need a neutral point connection and is therefore suitable for all 3AC systems. The supply voltage of the electronics is taken from the system to be monitored. The supply for the electronics, the relays and the connection for the external energy store are separated from the system with dual insulation. Special input transformers muffle the transfer of interference factors from the system. The response values for under and overvoltage and for response delays can be adjusted to any level.

Product overview Power Quality

Recommended measuring and monitoring relays:

DIN EN 60255-1 VDE 0435-300
Measuring relays and protection equipment - Part 1: Common requirements

DIN EN 60255-127 VDE 0435-3127
Measuring relays and protection equipment - Part 127: Functional requirements for over/under voltage protection