MK Diamond Baldor Motor - Manual (Page 14)

2-4 Installation & Operation MN428
AC Power Motors with flying lead construction must be properly terminated and insulated.
Connect the motor leads as shown on the connection diagram located on the name plate or inside the cover
on the conduit box. Be sure the following guidelines are met:
1. AC power is within +10% of rated voltage with rated frequency. (See motor name plate for ratings).
OR
2. AC power is within +5% of rated frequency with rated voltage.
OR
3. A combined variation in voltage and frequency of +10% (sum of absolute values) of rated values, provided
the frequency variation does not exceed +5% of rated frequency.
Performance within these voltage and frequency variations are shown in Figure 2-3.
Figure 2-2 Accessory Connections
Rotation
All three phase motors are reversible. To reverse the direction of rotation, disconnect and lock out power
and interchange any two of the three line leads for three phase motors. For single phase motors, check the
connection diagram to determine if the motor is reversible and follow the connection instructions for lead
numbers to be interchanged. Not all single phase motors are reversible.
Adjustable Frequency Power Inverters used to supply adjustable frequency power to induction motors produce
wave forms with lower order harmonics with voltage spikes superimposed. Turn−to−turn, phase−to−phase,
and ground insulation of stator windings are subject to the resulting dielectric stresses. Suitable precautions
should be taken in the design of these drive systems to minimize the magnitude of these voltage spikes.
Consult the drive instructions for maximum acceptable motor lead lengths, and proper grounding.
Note: Main power leads for CE Marked Motors may be marked U,V,W – for standard configurations,
please consult connection diagrams.
Caution: The space heaters are designed to operate at or below the maximum surface temperature stated on the
nameplate. If the marked ambient and/or voltage are exceeded this maximum surface temperature can
be exceeded and can damage the motor windings. If applied in a division 2 or zone 2 environment this
excessive temperature may cause ignition of hazardous materials.
One heater is installed in each end of motor.
Leads for each heater are labeled H1 & H2.
(Like numbers should be tied together).
Three thermistors are installed in windings and tied in series.
Leads are labeled TD1 & TD2.
Winding RTDs are installed in windings (2) per phase.
Each set of leads is labeled 1TD1, 1TD2, 1TD3, 2TD1, 2TD2, 2TD3 etc .
* One bearing RTD is installed in Drive endplate (PUEP), leads
are labeled RTDDE.
* One bearing RTD is installed in Opposite Drive endplate (FREP), leads
are labeled RTDODE.
* Note RTD may have 2−Red/1−White leads; or 2−White/1−Red Lead.
TD1 TD2