Startup Procedures
Pulse Frequency
Parameter | Description |
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P1800 | Pulse Frequency | 1. | Press | to enter the SED2 | Minimum = 4 |
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| Sets pulse frequency (kHz) of |
| parameter mode and to display | Default = | |
| power switches in SED2. The |
| r0000. |
| Varies by |
| frequency can be changed in |
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| model |
| increments of 2 kHz. | 2. | Press | to advance to | (hp/voltage |
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| dependent) | |||
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| parameter P1800. | ||
| Pulse frequencies > 4 kHz |
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| Maximum = 16 | |
| selected on 380V to 480V units |
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| reduce the maximum continuous | 3. | Press | to access the |
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| motor current. |
| parameter values level. |
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| 4. | Press | to advance to |
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| desired value. |
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| 5. | Press | to confirm and save |
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| the setting. |
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NOTES:
1. Minimum pulse frequency depends on P1082 (maximum frequency) and P0310 (rated motor frequency).
2. At 4 kHz, full output current is obtained up to 50 degrees C (CT mode); over 50 degrees C, full output may be obtained at 8 kHz.
3. If silent operation is not absolutely necessary, lower pulse frequencies may be selected to reduce SED2 losses and
4. Under certain circumstances, the SED2 may reduce the switching frequency to provide protection against
Siemens Building Technologies, Inc. | 37 |
