Lenze EVF9383 - Manual (Page 96)

Basic devices in the power range 250 ... 400 kW
Wiring of motor temperature monitoring 5.5
5.5.9
l
5.5−14 EDSVF9383V EN 7.1−04/2012
Wire T1, T2 only if the motor is equipped with a PTC thermistor or thermal
contact (NC contact).
ƒ An "open" cable acts like an antenna and can cause faults on the drive
controller.
{
Danger!
ƒ All control terminals only have basic insulation (single
isolating distance) after connecting a PTC thermistor or a
thermal contact.
ƒ Protection against accidental contact in case of a defective
isolating distance is only guaranteed through external
measures, e.g. double insulation.
PE U V W T1 T2 +UG -UG
PES PES
PE M
3~
J>
PES PES
PES
2.7 k
MONIT-OH8
15 V
3.3 k
7.4 k
T1 T2
9300vec139 9300std328
Fig. 5.5−13 Connection of PTC thermistor or thermal contact (NC contact) at T1, T2
Characteristics of the connection for motor temperature monitoring:
Terminals T1, T2
Connection l PTC thermistor
– PTC thermistor with defined tripping temperature (acc. to
DIN 44081 and DIN 44082)
l Thermal contact (NC contact)
– Thermostat as NC contact
Tripping point l Fixed (depending on the PTC/thermal contact)
l PTC: R J > 1600 W
l Configurable as warning or error (TRIP)
Notes l Monitoring is not active in the Lenze setting.
l If you do not use a Lenze motor, we recommend the use of a PTC
thermistor up to 150°C.
Motor with PTC thermistor or
thermal contact (NC contact)