IEC Manual Motor Starter Protectors Frequently Asked Questions
IEC Manual Motor Starter Protectors Frequently Asked Questions
| Question | Can the starters be used for dc motors? |
| Answer | All of our starters and contactors have an IEC utilization code of AC-1 (non-inductive or slightly inductive loads) and AC-3 (inductive loads like induction motors.) Under IEC 60947-2, -3, -4, and 5. The Categories for dc rated low voltage switchgear and control gear are clearly defined. The reasons for not using an AC rated contactor in a dc system: 1.) Not specified by the manufacturer. 2.) The device does not monitor the dc voltage the same way. 3.) The make or break ratings are higher in dc applications. 4.) No arc suppression. |
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This item was last updated on 06-05-2002
Document ID: 925
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