PMDsrange electronic monitoring relays

Use PMDsrange electronic monitoring relays to monitor:

• Voltage
• Phase sequence
• Current
• Insulation
• True power
• Temperature
• Standstill
• Fault voltage

  The information below provides real examples of the PMDsrange in practice. Of course you can also use PMDsrange products for applications other than those described here.

Use voltage monitors, for example, to monitor voltage supplies on bottling plants. The monitoring relay ensures that the plant is shut down in a controlled manner. It also protects against an uncontrolled restart.

Use phase sequence monitors to monitor the phase sequence. This will reduce the number of hazardous situations for man and machine. On rollers on which the direction of rotation has been set incorrectly, for example.

Current monitoring is required, for example, on a screw conveyor. It can provide protection against blockage and wear and tear, thereby helping with preventive maintenance.

Use insulation monitoring in hospitals. In operating theatres, for example, preventive maintenance and advance information can help to achieve greater availability.

The range of different true power monitors is as diverse as the number of applications. Using the measured true power, it is possible to derive variables such as fill level, volume, torque or air pressure, for example. So it is possible to check contamination, flow rate or wear and tear on an air conditioning plant.

Use thermistor monitoring to protect your motors from overheating. You can also prevent an automatic start-up. This is particularly important with adverse cooling and when frequent start-up and braking of the motor is required.

Initiate automatic tool change as soon as standstill is achieved! It's possible thanks to standstill monitoring. Where you have tools with different run down times it's possible to resume work more quickly. So you can improve your cycle times. Without standstill detection, automatic tool change would be calculated to suit the tool requiring the longest run-down time.

In accordance with VDE 0545, welding transformers in automotive body plants, for example, are monitored for hazardous contact voltages and insulation faults. Monitor up to six secondary windings on welding transformers independently for hazardous voltages. You can also detect shorts across contacts and earth faults. At the same time you can monitor and display the correct earth connections.