Kriwan 22A263S80 INT69 TM2 Diagnose


The motor protector INT69 TM2 Diagnose is a further development of the reliable KRIWAN motor protectors.

Its supplementary flexible-response protective functions help to improve the availability and extend the service life of a refrigeration system.

The INT69 TM2 Diagnose automatically saves operational and error data in a non-volatile memory.

This data can be retrieved on a PC and analysed for diagnosis.

The full scope of the diagnosis is achieved by using a KRIWAN-specific AMS sensor.

This motor protector is mainly employed on compressors which are qualified acc. to IEC/EN 60335.

Functional Description

The temperature monitoring of the motor winding is done with two evaluation processes:

1) Static: Switch-off is immediate if the nominal response temperature of the built-in AMS or PTC sensors is reached.

2) Dynamic: If the temperature increases unusually quickly, the motor is switched off immediately even if the temperature is still far below the nominal response temperature. This prevents excess temperatures from occurring.

A short circuit at an AMS or PTC input also leads to a switch-off.

After expiration of the reset delay and elimination of the error or cooldown, the compressor can be restarted.

Temperature measuring circuits
- Type 1-2 AMS sensors in series alternative 1-9 PTC sensors acc. to DIN 44081, DIN 44082 in series  
- R25,total <1.8KΩ
- Rtrip, static 4.5KΩ ± 20%
- Rreset 2.75kΩ ±20%
- Max. length connection line 30m
Short circuit monitoring system PTC   Typically <30Ω  
Reset delay
 
- Motor temperature static - 5min  ± 1 min
- Motor temperature dynamic - 5min  ± 1 min

 

Kriwan 22A263S80