ZIEHL Temperature Control Relay Kaltleiter-Relais MSF220VL

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The MSF220VL is a temperature monitoring system that is specifically designed for dry transformers. It can also be used to measure the temperature of the core, which is important for rectifier transformers because harmonics can cause heat buildup in the core.

The MSF220VL has an intelligent control system that automatically prolongs the runtime of the cooling fan depending on the load of the transformer. This helps to prevent the transformer from overheating. The system also monitors each PTC circuit for breaks and short circuits, which helps to reduce the likelihood of false alarms. In addition, the relays in operating-current mode prevent the system from tripping when the supply voltage is switched on.

The device can be adapted to different applications with 4 programs:

1. Fan-control – alarm – trip (winding) – trip (core)
2. Alarm – trip (winding) – trip (core) – alarm (fault)
3. Fan-control – alarm – trip (winding) – alarm (fault)
4. Fan-control with hysteresis T1/T2 – alarm – trip (winding) – time relay

Overview of functions

• 4 inputs for PTC
• Intelligent control of fan
• Automatic fan-test 1x / week
• electronic reclosing lock for alarms (trip) connectable
• Monitoring of sensors
• Test-button
• Simple testing with disconnectable monitoring of break and short circuit (for 10 minutes)
• cURus
• LEDs for alarms, states of relays and sensors
• Housing for mounting on DIN-Rail or wall-mount(option)
• Mounting height 55 mm
• Universal supply voltage AC/DC 24-240 V
• DEWA-standard for Dubai