Transcription of ABB circuit breakers for direct current applications
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ABB circuit breakers for direct current applicationsLow Voltage Products & Systems 1 ABB Inc. 888-385-1221 1 SXU210206G0201 Index1. Introduction ..2 2. Generalities on direct current ..3 - 4 3. applications Conversion of alternative energies into electrical energy ..5 Electric traction ..7 Supply of emergency services or auxiliary services ..8 Particular industrial applications ..84. Generation Storage batteries ..9 Static conversion ..10 Dynamo ..115. Interrupting direct current ..12 - 136. Types of DC networks Network insulated from ground ..14 - 15 Network with one terminal grounded ..16 - 17 Network with the middle point of the supply source connected to ground ..18 - 197. Choice of the protective device ..20 - 308. Use of alternating current equipment in direct current Variation of the magnetic field ..31 - 32 Connection of circuit breaker poles in parallel ..339. ABB offering circuit breakers ..34 Molded case circuit breakers .
Currently, direct current is used primarily in urban transport like trolleybuses, trams and underground railways, with a supply voltage of 600 V or 750 V, up to 1000 V. The use of direct current is not limited only to vehicle traction. Direct current represents a supply source for the auxiliary circuits on board vehicles as well. In this case, ac-
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