www.usmotors.com
ID300/302 Integrated Motor Drive |
Overview of the ID300/302 Integrated Motor & Drive
15
2.5 Earth Leakage Current
2.5.1 Ground Leakage of the Motor and Drive
The motor and drive leakage current values are as follows:
*Proportional to the supply voltage and frequency.
•
Due to the leakage current, a permanent fixed ground connection must be provided, or other
suitable measures must be taken to prevent a safety hazard occurring if the connection is lost. For
more details, refer to Section 4.5 on
page 27
.
•
ID300/302 integrates an internal EMC filter, but there is no possibility to disconnect it. If the
ground leakage current is unacceptable for the application, contact Nidec Motor Corporation.
2.5.2 Use of Earth Leakage Detector (RCD)
A type B RCD that is capable to detect AC and pulsating DC fault currents can be used with the
ID300/302. If an external EMC filter is used, a delay of at least 50 ms is recommended to avoid
nuisance tripping. The leakage current is likely to exceed the trip level if all phases are not energized
simultaneously.
2.6 Thermal Overload Protection and Limits
The ID300/302 integrates internal functions to protect the motor and drive against overloads.
2.6.1 Motor Protection
Current in the lower IGBTs is continuously measured. The drive software uses these measurements to
calculate the actual I²t value for the motor. If the actual motor I²t exceeds the rated motor I²t, the drive
will trip. All drive models have thermal memory retention. However, an optional PTC thermistor can be
added in the motor windings to secure additional thermal protection.
Size 1 or 2 Drive
Size 3 Drive
50 Hz
•
2.9 mA* AC at 230 V 1ph (L-N)
•
0.8 mA* AC at 230 V 1ph (L-L)
•
1.2 mA* AC at 230 V 3ph (TN)
•
2.9 mA* AC at 230 V 3ph (corner delta)
•
19.4 mA* AC at 480 V 3ph (TN)
•
49.4 mA* AC at 480 V 3ph (corner delta)
60 Hz
•
3.5 mA* AC at 230 V 1ph(L-N)
•
0.9 mA* AC at 230 V 1ph (L-L)
•
1.4 mA* AC at 230 V 3ph (TN)
•
3.4 mA* AC at 230 V 3ph (corner delta)
•
21.3 mA* AC at 480 V 3ph (TN)
•
57.3 mA* AC at 480 V 3ph (corner delta)
50 Hz
•
1.6 mA* AC at 230 V 3ph (TN)
•
2.9 mA* AC at 230 V 3ph (corner delta)
•
3.2 mA* AC at 480 V 3ph (TN)
•
5.7 mA* AC at 480 V 3ph (corner delta)
60 Hz
•
1.9 mA* AC at 230 V 3ph (TN)
•
3.4 mA* AC at 230 V 3ph (corner delta)
•
3.8 mA* AC at 480 V 3ph (TN)
•
6.9 mA* AC at 480 V 3ph (corner delta)
WARNING
!
