Interroll DL Series - Thermal Protection

Version 1.2 (08/2022) en
Translation of original operating instructions 13 of 64
General technical information
3.5 Thermal protection
Under normal operating conditions, the thermal circuit breaker integrated in the stator winding is closed. When the
motor limit temperature is reached (overheating), the switch opens at a preset temperature to prevent damage to the
motor.
WARNING
The thermal circuit breaker is automatically reset after the motor has cooled o.
Inadvertent start-up of the motor
¾ Connect the thermal circuit breaker in series with a suitable relay or contactor so that the current supply to
the motor is safely interrupted when the switch trips.
¾ Ensurethatthemotorcanbeswitchedonagainafteroverheatingonlywithaconrmationbutton.
¾ Aftertheswitchhastripped,waituntilthemotorhascooledo,andensurepriortoswitch-onthatthereis
no danger to persons.
Standard design: temperature limiter, automatically switching back
Service life: 10.000 cycles
AC cos φ = 1 2,5 A 250 V AC
cos φ = 0,6 1,6 A 250 V AC
DC 1,6 A 24 V DC
1,25 A 48 V DC
Service life: 2.000 cycles
AC cos φ = 1 6,3 A 250 V AC
Reset temperature 40 K ± 15 K
Resistance <50mΩ
Contact bounce time < 1 ms