Products 
Measuring and monitoring relays Monitoring relays for special functions
Monitoring relays for special functions
| ZUE150 | |
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A voltage drop or interruption in control circuits of production lines or conveying systems the processes of which are susceptible to interruptions may cause considerable costs. Therefore, it is often desired to restart the loads automatically after voltage interruptions. In order to avoid that all loads are connected to supply at the same time, the loads have to be connected at intervals. |
| GM420 | |
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The loop monitor of the GM420 series is designed to monitor the resistance of PE conductor connections in AC systems and in deenergized systems. For the measurement of the resistance the extraneous voltage Uf between the terminals E and KE must not exceed AC 12 V. At voltages above AC 12 V only the voltage is measured. The ohmic resistance of the conductor loop and the existing extraneous AC voltage Uf will be indicated on the display. |
| RM475/RM475LY | |
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The devices of the RM475 series in conjunction with a terminating device are designed to monitor a closed and voltage-free loop for interruption (series resistance) and for short-circuit (cross resistance). The RM475 version has a continuously set response value for series and cross resistance. The response time is max. 1 s. The response value for the series resistance of device version RM475LY can be adjusted between 50…500 Ω. |
| SB146 | |
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The relays of the SB146 series monitor the secondary circuits of welding transformers for fault voltages. A total of six secondary circuits can be monitored. |
| SB471/473/476 | |
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The relays of the SB47x series monitor the secondary circuits of welding transformers for fault voltages. A total of six secondary circuits can be monitored. The versions SB473 and SB476 can be linked for common alarm messages. |
| SP100 | |
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The energy backup of the SP100 series is a supplementary device for measuring and monitoring relays with a time function, if these are to be operated without external supply voltage. It provides the electronics of the connected monitoring relay with the necessary energy, to cover the duration of the maximum time delay after power supply failure. |
