User Manual of A90 Series Inverter
269
Model and
specification
Application
Minimum
Resistance
(Ω)
Average Braking
Current I
av
(A)
Peak
Current
I
max
(A)
Applicable
Inverter Power
(kW)
BR100-045
Energy
consumption
braking
10
45
75
18.5 - 45
BR100-160
Energy
consumption
braking
6
75
150
55 - 160
★
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%, the braking unit will work intermittently. Otherwise, an
over-temperature protection fault will occur.
11.3 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 0-1 for the wiring
specifications of the main circuit. Use the cables with the conforming insulation levels and
cross-sections.
Table 0-1 Wire Specifications of Braking Units and Braking Resistors
Specification
and model
Average Braking
Current I
av
(A)
Peak Braking Current
I
max
(A)
Cross-section (mm
2
) of
Copper-core Cable
BR100-045
45
75
10
BR100-160
75
150
16
BR100-315
120
300
25
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 in Fig. 0-1.
