Operating transformer stations safely

Control voltage

High availability starts with a reliable supply

Control voltage

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 transformer station 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
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
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

USV

A safe supply until the generator is running

USV

An uninterruptible power supply (UPS) is used to ensure the supply of critical electrical loads in the event of problems in the power supply. The UPS systems (normally battery or oscillating weight systems) bridge the period until the emergency power systems (generators) are activated or the network is available again. Electrical safety is continuously monitored by Bender products, including offline monitoring.

Product overview Power Quality
Product overview Residual current monitoring

Recommended systems for ground-fault detection (ungrounded systems):

Recommended systems for ground-fault monitoring (grounded systems):

Recommended systems for permanent monitoring:

Recommended measuring current transformers:

DIN EN 50272-2
Safety requirements for secondary batteries and battery installations - Part 2: Stationary batteries

Voltage monitoring

Monitoring of three-phase AC systems

VMD258

The VMD258 analog 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 Residual current monitoring

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