Section 1
General Information
3-4 Receiving & Installation
MN715
Electrical Installation
To make electrical connections, use UL listed closed loop connectors that are of
appropriate size for wire gauge being used. Connectors are to be installed using crimp
tool specified by the manufacturer of the connector. Only Class 1 wiring should be used.
Baldor Series H controls feature UL approved adjustable motor overload protection
suitable for motors rated at no less than 50% of the output rating of the control. Other
governing agencies such as NEC may require separate over-current protection. The
installer of this equipment is responsible for complying with the National Electric Code
and any applicable local codes which govern such practices as wiring protection,
grounding, disconnects and other current protection.
System Grounding
Baldor Controls are designed to be powered from standard three phase lines that are
electrically symmetrical with respect to ground. System grounding is an important step in
the overall installation to prevent problems. The recommended grounding method is
shown in Figure 3-1.
Figure 3-1 Recommended System Grounding
L1
AC
Main
Supply
Safety
Ground
Driven Earth
Ground Rod
(Plant Ground)
Four Wire
“Wye”
L1
L2
L3
Earth
LOCAL
SHIFT
DISP
RESET
PROG
ENTER
JOG
STOP
REV
FWD
L2 L3
T1 T2 T3
Series H
Line
Reactor
Load
Reactor
Route all 4 wires L1, L2, L3 and Earth
(Ground) together in conduit or cable.
Route all 4 wires T1, T2, T3 and Motor
Ground together in conduit or cable.
Connect all wires (including motor ground)
inside the motor terminal box.
Ground per NEC and
Local codes.
Note: A line reactor is recommended
and must be ordered separately.
Note: A load reactor is recommended
and must be ordered separately.
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