oatings
3.4
Motor Space Heaters
3.5
Motor Terminal Boxes
3.6
Stator and Bearing Temperature Detection
3.7 Vibration
Detection
and Monitoring System
3.8 Electrical
and
Mechanical Design Requirements

4.0 Slide
Rail
Requirements
4.1 Application
4.2 Fabrication

5.0 Drawings
and
Data
5.1 Motors
5.2 Slide
Rails

6.0 Shipment

7.0 Proposal

8.0 Limited
Warranty

9.0
Motor Data Sheet


Page 1 of 18 Medium Voltage Motors Designed for Processing Applications



Medium Voltage Motors Designed for Process Industry Applications


1.0 Purpose

The intent of this specification is to work with Baldor Electric in a partnership to
supply superior quality motors that consistently perform, with highest efficiency,
improved life cycle and lowest maintenance cost. The motors shall be built to
provide: (1) safe operation; (2) reliability in process industry environments that
are typically corrosive and wet, (3) minimum maintenance requirement due to the
design and quality of materials and workmanship, (4) lowest noise pollution, (5)
greatest energy conservation (when specified).

2.0 Scope

2.1
Motors Covered by Specification

This specification covers the requirements for all three-phase medium
voltage motors 250 HP through 1500 HP Input voltage may be 2300, 4160
or 2300/4160 volts, 60 hertz or 3300 volts 50 Hz. Enclosures may be
TEFC Totally-Enclosed Fan-Cooled or Weather-Proof Type II.

2.2
Motor Data Sheets

Specific motor information required for quotation will be transmitted as
attachments to the release orders on the Motor Data Sheets.

3.0 Motor
Requirements

3.1
Applicable Codes and Regulations

All motors furnished shall be designed, manufactured, and tested in
accordance with the latest applicable standards of ANSI, IEEE, ASTM,
and OSHA (Safety and Health Standards, 29CFR1910). As a minimum
requirement, all motors shall conform to the latest applicable sections of
NEMA Standard MG-1.

3.2 Enclosures

3.2.1 Preferred motor enclosure type should be TEFC with use of WPII
enclosures as allowed by application. All motors will have the
wiring box mounted in NEMA F1 position as standard. Other
conduit box locations are to be specified.

Page 2 of 18 Medium Voltage Motors Designed for Processing Applications


3.2.2 The frame enclosures shall be of cast iron construction. Frame, end
brackets and conduit box shall all be cast iron construction. WPII
hoods may be a corrosion-protected steel fabrication.

3.2.3 Motors shall have permanently attached a means for lifting,
preferably built into the frame. WPII motors have provisions for
lifting by lugs on the frame without removal of the hood.

3.2.4 Motor frames shall have drain openings suitably located for the
mounting assembly being provided. Breather drains shall be
provided.

3.2.5 Motor nameplate shall be made of 316 stainless steel, mounted on
the motors enclosure with stainless steel fastening pins.
Nameplate shall have as a minimum, all information as described in
NEMA Standard MG-1-20.60 and overall weight. Motor bearing
numbers shall be included. Wiring diagram shall also be included
on nameplate or attached to motor and easily readable.

3.2.6 Motors shall be designed such that either rotation may be used.

3.2.7 Any special features required such as lightning arresters, surge
capacitors, vibration and speed switches, motor differential CT's
and others shall be specified on attached Motor Data Sheets.

3.3 Protective
Coatings

3.3.1 Motors shall be designed and have corrosion resistant finishes
suitable for severe duty operation in the adverse environmental
conditions normally encountered in a pulp and paper mill
atmosphere.

3.3.2 Protective coating and/or painting for extended life shall consist of a
primer and epoxy finish coat of 4-5 mils.

3.3.3 Internal surfaces, shaft, rotor, stator iron, end bells and parts shall
be covered with a corrosion resistant coating of epoxy paint or
equal material of 2 mils minimum dry film thickness for increased
life against paper and pulp mill adverse environmental conditions.

3.3.4 Shaft extension shall be protected with a rust preventive strippable
coating capable of being peeled off or unwrapped.
Page 3 of 18 Medium Voltage Motors Designed for Processing Applications



3.4
Motor Space Heaters

3.4.1 Wrap-around type motor space heaters shall be provided on all
motors securely attached to the motor windings. 120-volt space
heaters are standard, 230 volt optional when specified.

3.4.2 Motor space heaters shall be designed to maintain the motor
internal temperature above the dew point when the motor is not
running.

3.4.3 Space heaters shall be designed for long life, low skin temperature.

3.5
Motor Terminal Boxes and Leads

3.5.1 Motors shall be fitted with an oversized, cast iron, main terminal
box. The box shall be arranged so that conduit can enter from the
bottom. Gaskets shall be supplied between the box and motor
frame as well as between the box and its cover. As standard, the
box shall be mounted on the right hand side when facing the end of
the motor opposite the shaft extension (F1 location). Other
locations are optional when specified. The boxes shall come
completely assembled to the motor and shall use all cadmium-
plated attachments. The conduit box shall be completely rotatable
360
° in 90° increments, without obstruction of belt path.

3.5.2 Motor leads in the conduit box shall be sized in accordance with
NEC suggested minimum ampacity values using a minimum of
125
°C insulated lead wire. The wiring shall be clearly identified
every inch or the lead shall have a metal band in accordance with
ANSI C6.1, latest revision. Nameplates shall be supplied stating the
above data and permanently attached to the motor. Leads are to be
numbered for clockwise rotation when facing opposite the shaft
end.

3.5.3 Motors shall be provided with a compression type grounding lug,
the same size as motor leads, mounted in the conduit box by
drilling and tapping into the motor frame or by a double ended
silicon bronze cap screw.

3.5.4 A separate cast iron motor mounted terminal box shall be provided
for RTDs, bearing relays, space heaters, and any other specified
accessories. The accessory conduit box should be rotatable 360
°
in 90
° increments.
Page 4 of 18 Medium Voltage Motors Designed for Processing Applications



3.6
Stator and Bearing Temperature Detection

3.6.1 All stock ECP motors (Baldors Super-E Chemical Processing)
449T frame (~250 hp) and larger shall be supplied with 6
resistance-type detectors (RTD) suitably distributed around the
circumference of the stator, 2 per phase, located between coil sides
and located in position to sense the highest temperature of the
stator. Standard RTDs shall be 100 ohm platinum type. 10-ohm
copper or 120 ohm nickel winding RTDs may be supplied as an
option. RTD leads shall be supplied from the RTD to the terminal
box and securely attached. RTDs should be specified on custom
motor orders.

3.6.2 When specified, two resistance-type detectors (RTD) for bearing
temperature protection shall be supplied on each bearing. RTD
leads to be brought out to a separate terminal box. A terminal strip
may be supplied when specified.

3.7 Vibration
Detection
and Monitoring System

3.7.1 When specified, motors requiring vibration monitoring shall have
the required type of devices specified on the motor data sheet.

3.7.2 Motors shall be run and vibration checked prior to shipment.
Maximum vibration allowed should be 0.15 inches/second velocity
measured at the bearing housings.

3.8 Electrical
and
Mechanical Design Requirements

3.8.1 Motors shall be NEMA Design B, 80
° C temperature rise at rated
load, class F insulation minimum, premium efficiency design,
squirrel cage induction type. Where other designs are required,
they will be specified on the Motor Data Sheet. Nameplate shall
read 1.15 service factor.

3.8.2 Motors shall have normal Design B starting torque per NEMA. If
other NEMA Designs or operating conditions are required, specify
requirements on the Motor Data Sheet.

3.8.3 Motors shall be wound for three-phase, 60-Hertz operation. Voltage
shall be 2300/4160. It is the responsibility of the motor
manufacturer to take into consideration the voltage drop normally
observed when starting large AC motors. When specified, other
voltages and 50 hertz designs are available.

Page 5 of 18 Medium Voltage Motors Designed for Processing Applications


3.8.4 Insulation system shall be class F minimum, non-hygroscopic.
Motors shall be capable of carrying full load current continuously in
an ambient temperature of 40
° C. Such motors shall not exceed 80°
C average winding temperature rise by resistance for 1.0 service
factor. The insulation shall be built for long trouble-free life in a
process industry atmosphere containing excessive amounts of
steam, moisture, chemicals, and abrasive materials.

3.8.5 Form wound coils shall be constructed in a way and of materials
suitable for VPI treatment. Coils shall be made from heavy fused
polyester glass fiber film coated insulated rectangular conductors
rated 200
° C, unless otherwise specified. Form wound coils shall be
made with a full length Nomex slot wrapper rated at 5000 volts
minimum which extends