Curtis 1234/36/38 Manual, Rev. D
7
1 1 J U LY 2 0 0 8 D R A F T
High current wiring recommendations: all models
Battery cables (B+, B-)
These two cables should be run close to each other between the controller
and the battery. Use high quality copper lugs and observe the recommended
torque ratings. For best noise immunity the cables should not run across the
center section of the controller. With multiple high current controllers, use a
star ground from the battery
B- terminal.
Motor wiring (U, V, W)
The three phase wires should be close to the same length and bundled together
as they run between the controller and the motor. The cable lengths should be
kept as short as possible. Use high quality copper lugs and observe the recom
-
mended torque ratings. For best noise immunity the motor cables should not
run across the center section of the controller. In applications that seek the
lowest possible emissions, a shield can be placed around the bundled motor
cables and connected to the
B- terminal at the controller. Typical installations
will readily pass the emissions standards without a shield. Low current signal
wires should not be run next to the motor cables. When necessary they should
cross the motor cables at a right angle to minimize noise coupling.
Lug assembly: 1236 and 1238 models
Five brass M8 terminals are provided. Lugs should be installed as follows, using
M8 bolts sized to provide proper engagement (see diagram):
• Place the lug on top of the brass
terminal, followed by a
high-load safety washer with its convex side on top. The
washer should be a
SCHNORR 700800, or equivalent.
• If two lugs are used on the same
terminal, stack them so the
lug carrying the least current is on top.
• Tighten the assembly to 9.6 ±0.9 N·m (85 ±8 in-lbs).
Note: The
terminals may rotate up to ±5° in the cover.
2 — INSTALLATION & WIRING: High Current Connections
To Next Page
Loading...
