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Kriwan 22A278S30 INT369 KA Diagnose
Application
The motor protector 22A278S30 KA Diagnose is a further development of the reliable KRIWAN motor protectors.
The 22A278S30 INT369 KA Diagnose automatically saves operational and error data in a non-volatile memory. This data can be retrieved on a PC and analysed for diagnosis.
This motor protector is mainly employed on compressors of which the PTC sensors in the motor winding are led out individually.
The 22A278S30 INT369 KA Diagnose automatically saves operational and error data in a non-volatile memory. This data can be retrieved on a PC and analysed for diagnosis.
This motor protector is mainly employed on compressors of which the PTC sensors in the motor winding are led out individually.
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 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.
The 22A278S30 INT369 KA Diagnose monitors the applied module supply voltage and switches off as soon as it drops below a fixed specified limit value. After expiration of the reset delay and elimination of the error, the compressor can be restarted.
An active reset delay can be reset only by briefly connecting the terminals "X" and "C".
The built-in LED signals the current status of the motor protector
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 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.
The 22A278S30 INT369 KA Diagnose monitors the applied module supply voltage and switches off as soon as it drops below a fixed specified limit value. After expiration of the reset delay and elimination of the error, the compressor can be restarted.
An active reset delay can be reset only by briefly connecting the terminals "X" and "C".
The built-in LED signals the current status of the motor protector
| Temperature measuring circuits | |
| - Type | 3 separate inputs for PTC sensors acc. to DIN 44081, DIN 44082 |
| - Rtrip, static | 13KΩ ± 3KΩ |
| - Rreset | 3.25kΩ ± 0.5KΩ |
| - Max. length connection line | 30m |
| Reset delay | 2min ± 20s |
| Reset of reset delay | Activation of the reset input only possible if there is no error current |
Kriwan 22A278S30
