R-
R+
ohm
PE
1 kV DC,
> 1 Mohm
￭ Connection procedure
1. Connect the resistor cable to the R+ and R- terminals in the same way as the other
power cables. Use the same cable type as with the DC input cable. If a shielded
threeconductor cable is used, cut the third conductor, insulate it, and ground the twisted
shield of the cable (protective earth conductor of the resistor assembly) at both ends.
2.
Connect the thermal switch of the brake resistor as described above under Protecting
the system against thermal overload.
Resistor braking using frames R1i…R4i inverter modules 333
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