Chapter 4 – Electrical Installation
4-14 Installation and Start-up Guide for NBRA-6xx
ACS 600 Connection Ensure that the UDC+ and UDC– busses of the chopper are properly
connected to the corresponding terminals of the ACS 600 (see
Chapter 3 – Voltage Selection and Mechanical Installation).
Resistor Cable
Connection
Connections at the braking resistor:
(For terminal tightening torques, consult resistor documentation.)
• Twist the screen wires together and connect them to the earthing
terminal, along with conductor no. 3 (if present).
• Crimp cable terminals of appropriate type onto conductors 1 and 2.
• Connect conductor no. 1 to the R+ terminal.
• Connect conductor no. 2 to the R– terminal.
Connections at the braking chopper:
Figure 4-9 Resistor cable stripping diagram (braking chopper end).
All lengths are approximate and may vary according to the
cable lugs used.
• Cut and strip the cable as shown in Figure 4-9 above.
• Cut an opening in the grommet at the cable entry. For best results,
cut along the appropriate diameter marking.
• Lead the cable through the bushing into the converter unit.
• Place the strain relief onto the cable insulation and tighten to 6 Nm.
• Twist the screen wires together and connect to the earthing clamp
on the ACS 600 PE bus, along with conductor no. 3 (if present).
Tighten the clamp to 6 Nm.
• Crimp cable lugs onto conductors 1 and 2. (The screws on the R+
and R– busbards of the chopper are M8.)
• Connect conductor no. 1 to the R+ terminal of the chopper. Support
the back nut with a tool and tighten to 16 Nm.
• Connect conductor no. 2 to the R– terminal of the chopper. Support
the back nut with a tool and tighten to 16 Nm.
• Leave enough free space to make subsequent servicing (eg.
replacement of the converter cooling fan) easier. (See picture on
left.)
85 mm
115 mm
Gland Plate
Screen
1
2
3
min. 150 mm
Side view
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