Product type: PTC-resistor relay for dry transformer temperature monitoring
Part numbers: T221717 (AC/DC 24–240 V), T221718 (AC 220–240 V)
Rated supply voltage:
AC/DC 24–240 V (AC 19–264 V, DC 20–297 V)
AC 220–240 V ±10 %, 50/60 Hz
Power consumption: < 3 VA
Connectable PTC resistors: 2 × 1…6 PTC according to DIN 44081/44082
Switching threshold: < 4000 Ω
Output relays:
1 × change-over contact (CO)
1 × normally open contact (NO)
Monitoring functions: Sensor short-circuit and break monitoring (activatable)
Indicators: LEDs for ON, Alarm 1 and Alarm 2
Control: Test button (delayed)
Rated ambient temperature range: –20 °C to +55 °C
Housing type: K-type, vertically arranged terminals
Dimensions (approx): 75 × 22.5 × 110 mm (H × W × D)
Mounting: 35 mm DIN rail or M4 screws
Protection rating: IP30 (housing) / IP20 (terminals)
Weight: Approx. 110 g
