INDCO, Inc.
M-M-30118 mixer manual HS-5
date: 3/8/05
Electric Motor Data, fixed speed
(continued)
Full Load Current Specifications
Note:
The following table is a general guide only and are for normal duty applications. The exact specifications for any given motor
can vary from those listed below,
see actual motor nameplate for exact specifications
.
Temperature Limits - Insulation Classification
Below are the temperature limits for some electric motors.
Most INDCO mixers have insulation class ‘B’ and some have class ‘F’ ratings.
Class
Maximum Ambient
Maximum Heat Rise
Maximum Operating Temperature
A
104°F
117°F
221°F
B
104°F
162°F
266°F
F
104°F
207°F
311°F
H
104°F
252°F
356°F
Operation:
1.
Ensure that voltage and frequency stamped on motor
nameplate corresponds with that of the power line.
2.
Check all connections to the motor with the wiring diagram.
3.
Be sure rotor turns freely when disconnected from the load.
Any foreign matter in the air gap should be removed.
4.
Leave the motor disconnected from the load for the initial
start. Check for proper rotation. After the machine is coupled
to the load, check the nameplate amps are not exceeded.
Shut down the motor if the above parameters are not met or if
any other noise or vibration disturbances are present. Consult
NEMA guidelines or the equipment manufacture if any questions
exist before operating equipment.
Allowable Voltage & Frequency Range:
If voltage and frequency are within the following range,
motors will operate, but with somewhat different
characteristics than obtained with correct nameplate values.
1. Voltage: Within 10% above or below the value stamped
on the nameplate. On three phase systems the voltage
should be balanced within 1%. A small voltage
unbalanced will cause a significant current unbalance.
2. Frequency: Within 5% above or below the value
stamped on the nameplate.
3. Voltage and frequency together: Within 10% (providing
frequency above is less than 5%) above or below
stamped on the nameplate.
Cleanliness:
Keep both the interior and exterior of the motor free from
dirt, water, oil and grease. Motors operating in dirty places
should be periodically disassembled and thoroughly
cleaned.
NOTE:
Explosion proof motors should only be
disassembled by an authorized service station.
Condensation Drain Plugs:
All explosion proof and some totally enclosed motors are
equipped with automatic drain plugs, they should be free of
oil, grease, paint, grit and dirt so they don’t clog up. The
drain system is designed for normal floor (feet down)
mounting. For other mounting positions, modification of
the drain system may be required, consult the manufacture.
Service:
Warning
- Disconnect power before working on motor or
driven equipment. Motors with automatic thermal protectors
will automatically restart when the protector temperature
drops sufficiently. Do not use motors automatic thermal
protectors in applications where restart will be hazardous
to personnel or equipment.
Caution
- Over greasing bearings can cause premature
bearing and/or motor failure. The amount of grease added
should be carefully controlled.
Note
- If lubrication instructions are shown on the motor
nameplate, they will supersede this general instruction.
Some electric motors are pre-greased with a polyurea
mineral oil NGLI grade 2-type grease unless stated
otherwise on the motor nameplate. Some compatible
brands of polyurea mineral base type grease are: Chevron
SRI #2, Rykon Premium #2, Shell Oil Dolium R or Texaco
Polystar RB.
Motors are properly lubricated at time of manufacture. It is
not necessary to lubricate at the time of installation unless
the motor has been in storage for a period of 12 months or
longer.
page 7 of 11
3-phase, 60Hz, AC electric motors:
HP
RPM
230 Volt,
460 Volt,
Full Load AMPS Full Load AMPS
2
1800
6.8
3.4
3
1800
9.6
4.8
5
1800
15.2
7.6
7.5
1800
22.0
11.0
10
1800
28.0
14.0
15
1800
42.0
21.0
20
1800
54.0
27.0
1-phase, 60Hz, AC electric motors:
HP
RPM
115 Volt,
230 Volt,
Full Load AMPS Full Load AMPS
1/4
1800
5.8
2.9
1/3
1800
7.2
3.6
1/2
1800
9.8
4.9
3/4
1800
13.8
6.9
1
1800
16.0
8.0
1.5
1800
20.0
10.0
2
1800
24.0
12.0
3
1800
34.0
17.0
