User Manual of EM730 Series Inverter ★ When BR100-160 works with the minimum resistance, the braking unit can work continuously at the braking frequency D=33%. In the case of D>33%, intermittent operation will be performed; otherwise, the over-temperature protection will be enabled. 10.2.1 Selection of Connecting Wires Since all braking units and braking resistors work at high voltage (>400VDC) and in the discontinuous status, please select appropriate wires. See Table 4-29 for the wiring specifications of the main circuit. Use the cables with the conforming insulation levels and cross-sections.
Table 4- 29 Wire Specifications of Braking Units and Braking Resistors Flexible cables have higher flexibility. Because cables may be in contact with high-temperature devices, it is recommended to use copper-core and heat-resistant flexible cables or flame-retardant cables. The braking unit should be close to the inverter as much as possible and no more than 2m far away from the inverter. Otherwise, the DC-side cables should be twisted and used with magnetic rings to reduce radiation and inductance.
The lengths of connecting wires of the braking unit, braking resistor and inverter are shown 366 BR100-045 consumption braking 10 45 75 18.5 ~ 45 BR100-160 Energy consumption braking 6 75 150 55 ~ 160 BR100-200 Energy consumption braking 5 100 200 185 ~ 200 BR100-315 Energy consumption braking 3 120 300 220 ~ 315 BR100-400 Energy consumption braking 3 200 400 355 ~ 450 Specification and model Average Braking Current I (A) av Peak Braking Current I (A) max Cross-section (mm2) of Copper-core Cable BR100-045 45 75 10 BR100-160 75 150 16 BR100-200 100 200 25 BR100-315 120 300 25 BR100-400 200 400 35