Rockwell 70-602, Technical Manual

Page: 20 / 48

INSTRUCTIONS FOR CONNECTING THE THREE PHASE
MOTOR STARTER TO THE POWER SUPPLY
All three phase motor starters must be wired in the
the red, white, and black power leads terminals L1-
field as follows: Refer to Fig. 10 and remove and dis-
L2-L3 and the green ground lead to the ground strip
in the lower left-hand corner of the starter enclosure.
card the plastic plug covering the entrance hole in the
b o t t o m o f t h e s t a r t e r e n c l o s u r e . B r i n g t h e t h r e e
tor is turned on, simply interchange any two of the
phase power lead through the entrance hole. Connect three input power leads in terminals L1-L2-L3.
Several points must be stressed and closely followed
when connecting the input power to the motor start-
er.
1. To preserve the dust-tight integrity of the motor
starter, an oil-tight box connector should be used for
fastening the input cable to the starter enclosure at
the entrance hole.
2. If copper stranded wires are used for the input
leads, the wires must be soldered, dipped, or tinned
before they are connected to terminals L1-L2-L3 and
the ground strip.
3. The wires must be connected to terminals L1-L2-
L3 through the front face of the terminal block as
shown in Fig. 11. The screws on the top of the termi-
nal block are used for clamping the wires in the ter-
minal block.
4. The ground strip has provisions for three ground
leads. The input power, start/stop station, and motor
must be grounded via the ground strip. Two ground
wires must never be inserted in the ground strip under
one screw.
5. If metal conduit is used in place of cable, the
green ground wire from the three phase input power
system is omitted.
Fig 12 - Connections for
(LVC) Motor Starter
Fig 13 - Terminals L1-L2-L3 Connections
1 4