PTC thermistor tripping device MSR 220 KA is a motor protection device designed to protect electrical equipment with built-in PTC thermistor sensors against excess temperatures. It is suitable for direct monitoring of explosion-proof motors of ignition protection type Ex e and Ex d in gas explosion hazardous areas (zones 1 and 2) and in areas with combustible dust (zones 21 and 22).

Equipment features include:

• Input for 1 to 6 PTC thermistors according to DIN 44081/44082
• Short-circuit monitoring in the sensor circuit
• ATEX approval according to Directive 94/9/EC
• UL recognized component
• Electronic fault memory (can be switched off)
• Output relay with 2 changeover contacts.

Technical data:

• Outputs: 2
• Operating voltage: 200 - 240 V/50 Hz
• Weight: 150 g
• Measuring inputs:
• Product dimension, width: 22.5 mm
• Product dimension, height: 75 mm
• Type (manufacturer type): MSR 220 KA
• Other technical data: Relay voltage: 5 A/250 V/AC.