7.1.5 Shielding against Electrical Noise 208
7.1.6 External Fan Power Supply 208
7.2 Fuses and Circuit Breakers
208
7.2.1 Fuses 208
7.2.2 D-frame Short Circuit Current Rating (SCCR) 209
7.2.3 Recommendations 209
7.2.4 Power/Semiconductor Fuse Size 210
7.2.5 Power/Semiconductor Fuse Options 211
7.2.6 Supplementary Fuses 213
7.2.7 High Power Fuses 12-Pulse 215
7.2.8 Supplementary Fuses - High Power 216
7.3 Disconnectors and Contactors
217
7.3.1 Line Power Disconnects - Frame Sizes E and F 217
7.3.2 Line Power Disconnects, 12-Pulse 218
7.3.3 Line Power Contactors 218
7.4 Additional Motor Information
219
7.4.1 Motor Cable 219
7.4.2 Parallel Connection of Motors 220
7.4.3 Motor Insulation 222
7.4.4 Motor Bearing Currents 222
7.5 Control Cables and Terminals
222
7.5.1 Access to Control Terminals 222
7.5.2 Control Cable Routing 222
7.5.3 Control Terminals 224
7.5.4 Switches S201 (A53), S202 (A54), and S801 224
7.5.5 Installing Control Terminals 225
7.5.6 Basic Wiring Example 225
7.5.7 Installing Control Cables 226
7.5.8 12-Pulse Control Cables 229
7.5.9 Relay Output D Frame 231
7.5.10 Relay Output E & F-Frame 231
7.5.11 Brake Resistor Temperature Switch 232
7.6 Additional Connections
232
7.6.1 DC Bus Connection 232
7.6.2 Load Sharing 232
7.6.3 Installation of Brake Cable 232
7.6.4 How to Connect a PC to the Adjustable Frequency Drive 233
7.6.5 PC Software 233
Contents Design Guide
Danfoss A/S © Rev. 2014-02-10 All rights reserved. MG34S222
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