Rockwell Automation 8720SM User Manual

Installation Instructions

8720SM High Performance AC Induction
Motors

(Catalog Number 8720S M-xxxxxxxSx)

Introduction

This publication provide s installation instructi ons for the 8720SM
motors. Use this document if you are responsible for the design
and installation of 8720SM motors. Refer to the 8720MC High
Performance Drive Integration Manual (publication
8720MC-IN002x-EN-P) for performance information.

For: See page:

Complying w ith European Unio n Directives 2
8720SM AC Motor Overview 3
8720SM Receiving and Storage Information 4
Before Mounting Your Motor 5
Building Your 8720SM Motor Cables 7
Guidelines for Installing Your Motor 8
Wiring Your 8720SM Motor Power 9
Blower Motor 13
Motor Operation and Maintenance 15
Specifications 16
Dimensions 18
Motor Load Force Ratings 25

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2 8720SM High Perform a n ce AC Induction Motors

Complying with European Union Directives

If this product is installed wi t hi n the Eu rope an Uni on or EEC reg io ns
and has the CE mark, the following re g ul a ti ons apply.

EMC Directive

This unit is tested to meet Council Directive 89/336/EEC
Electromagnetic Compatib ility (EMC) using the f ollowing s tandards, i n
whole or in part:

•

EN 50081-2 EMC - Emission Standard, Part 2 - Industrial
Environment

•

EN 50082-2 EMC - Immunity Standard, Part 2 - Industrial
Environment

•

EN 61800-3 - Adjustable Speed Electrical Power Drive Systems,
Part 3 - EMC Product Standard inclu ding specific test methods

The product described in thi s installation instructions is intended fo r
use in an industrial environment.

Low Voltage Directive

These units are tested to meet Council Directi ve 73/2 3/EEC Low
Voltage Directive. The EN 60204-1 Safety of Machinery-Electrical
Equipment of Machines, Part 1-Specification for General Requirements
standard applies in whol e or in part.

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8720SM High Performance AC Induction Motors 3

8720SM AC Motor Overview

8720SM -

The 8720SM motors are high performance AC induction motors
specifically designed for use with the Allen-Bradley 8720MC Drives.
Refer to the configurator below to help identify your 8720SM motor.

xxx

x x xx S x

Feedback1

1 = SRS-660 (high resolution incremental feedback, MP-Series connector)
2 = SRM-60 (high resolution absolute feedback, MP-Series connector)
3 = SNS-60 (incremental feedback with marker)
4 = SNS-60 (incremental feedback with marker, MP-Series connector)

Speed Class

S = Standard

Curve Identification

Refer to publication 8720MC-IN002

Frame Number

1 = 112
2 = 132
3 = 132A

Winding Type

S = Single

Power

005 = 5.5 kW
007 = 7.5 kW
011 = 11 kW
015 = 15 kW
018 = 18.5 kW
022 = 22 kW
030 = 30 kW

Bulletin Number

4 = 160
5 = 180
6 = 200

037 = 37 kW
045 = 45 kW
055 = 55 kW
063 = 63 kW
075 = 75 kW
093 = 93 kW

x

-EN-P

1

Feedback options 1 and 2 apply to SERCOS mode applications. Feedback options 3 and 4 apply to Analog mode
applications.

Refer to the following table to compare the motor frame number to
the motor catalog number.

Frame Catalog Number (8720SM)

DL1106 -005S1BASx, -005 S1BBSx, -005S1BCSx
DL1108 -007S1CASx, -007 S1CBSx, -007S1CCSx
DL1110 -011S1DASx, -011S1DBSx, -011S1DCSx
RDL1307 -015S2EASx, -015S2EBSx, -015S2ECSx
RDL1308 -018S2FASx, -018S2FBSx
RDL1310 -022S2GASx
RDL1611 -030S4JASx
RDL1613 -037S4KASx
DL1811 -045S5NASx
DL1813 -055S5PASx
DL1815 -063S5QASx
DL2010 -075S6SASx
DL2012 -093S6TASx

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4 8720SM High Perform a n ce AC Induction Motors

8720SM Receiving and Storage Information

The customer is responsible for inspecting the equipment before
accepting the shipme nt from the freight company. Check t he items
against your purchase order.

Handling

The 8720SM motors are equipped with lifting eye bolts. These eye
bolts are provided to assist in handling and mounting the motors. The
motors can accommodate either flange or foot mount.

ATTENTION

Eyebolts may unscrew during lifting. Check the
eyebolts to insure that they are tight. Failure to
observe this precaution could result in bodily injury.

!

Storage

Store motors in a clean, dry area protected from extreme
temperatures, moisture, shock, and vibration. Observe storage
temperatures of -20° to 80° C (-4° to 176° F) with a relative humidity
of 5 to 95%.

IMPORTANT

ATTENTION

!

The application of motors and other electrical equipment in hazardous
locations is restricted by the National Electric Code. To ensure
compliance, observe these regulations and consult with local code
inspection and enforcement agencies.

All drains are fully operable while in storage. Store
motors so that the drain is at the lowest point. Dr ains
are located in the lower po rtion of the motor c astings
on both the drive and non-drive ends of the motor.

Only qualified electrical personnel familiar with the
construction and operation of this equipment and the
hazards involved should in st al l, adjust, operate, and/
or service this equipment. Read and un de rstand this
document in its entirety before proceeding. Failure to
observe this precaution could result in severe bodily
injury or loss of life.

Publication 8720SM-IN001A-EN-P — February 2003

8720SM High Performance AC Induction Motors 5

Before Mounting Your Motor

Before mounting your 8720SM motor, consider the following:

•

You can mount the motor horizontally or v e r tically with t h e sh aft
down or up.

•

The 8720SM motors are blower cooled with air flow from the
blower end to the drive end. The air flow must be flowing in the
direction of the arrow on the motor to provide adequate cooling.
Both air inlets and outlets must be free of obstructions. Maintain a
clearance of at least 100 mm (4 in.) at the bl ower inlet area.

•

When mounted, the motor must not be exposed to direct splash
or spray of cutting fluids or lubricatin g oils.

•

Motors include a labyrinth type shaft seal with flinger, which helps
protects against splashing. However, it will not provide protection
against flooding.

•

In an environment where high humidity is present or the motor
blower inlet air is saturated with coolant mist, make sure the
motor is mounted with the feet down and the drain holes at the
bottom of the motor are open.

•

The motors are designed for the ambient temperature i ndicated on
the nameplate. The standard motor maximum ambient is 40° C
(104° F). Locate the motor where the ambient temperature
require m ents are sat isfied and wh ere clean air has fre e access to
ventilating intake an d outlet openings . Except for machines w ith a
suitable protective enclos ure , t he locat i on should be clean and
dry.

IMPORTANT

ATTENTION

!

The cooling system on standard 8 7 20S M bl owe r
cooled motors requires that clean air is forced
through ducts which are integral to the stator frame.
It is important that you keep these ai r passages clean
and that sufficient clearance is provided on the
motor air inlets and stator duct outlets for
unrestricted air flow.

Y ou must be careful to prevent debris (such as metal
shavings and conduit knockouts) from falling into
the motor while performing any installation work
around the motor. A hazard of personal injury and/or
equipment damage exists if foreign material lodges
inside the motor.

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6 8720SM High Perform a n ce AC Induction Motors

Using Belted Driv es and Coupled Drives

Proper alignment is key for long life of bearings, shafts and belts, and
minimum downtime.

Belted Drives

If you use motor slide bases or rails, you must securely anchor them
to the foundation with the proper bolts. Make sure the motor shaft
and load shaft are parallel, and that the sheaves are aligned.

When a motor is belt coupled, the belt tension must not exceed the
radial load capabilities of the motor beari ngs. For belt drives, place the
sheave as close as possible to the motor bracket. The maximum
allowable radial load is assumed to be applied at the end of the motor
drive shaft.

IMPORTANT

Do not exceed the maximum allowable radial load
on the end of the shaft. Refer to the Radial Load
Force Ratings (Zero Axial Load) on page 25 for a
listing of radial loads .

Coupled Drives

Use flexible couplings between the motor shaft and the load shaft.
Align the motor shaft and the load shaft to values recommended for
the specific coupling before coupling is connected.

IMPORTANT

Do not exceed the maximum allowab le axial load on
the end of the shaft. Refer to the Axial Load Force
Ratings (Zero Radial Load) on page 26 for a listing of
axial loads.

Balancing the Motor

Misalignment can cause excessive vibration and damaging forces to
the shaft and bearings. During high speed operation, a small
unbalance can cause significant vibration. Make sure to accurately
dynamically balance any gears, pulleys, or couplings that are mounted
to the motor shaft. Best results are obtained by balancing after the
device is mounted to the shaft.

Publication 8720SM-IN001A-EN-P — February 2003

Motors are dynamically balanced to stay wit hi n a vibration l imit of

0.12 in./s, measured in accordance with NEMA MG-12.06. Balance is
done with a full leng th 1/2 height shaft key. A full shaft key is s hipped

8720SM High Performance AC Induction Motors 7

with the motor. Sheave or coupling should be balanced with a 1/2
height shaft key.

Preventing Electrical Noise

Use Electromagnetic Compatibility (EMC) techniques to reduce
Electromagnetic Interference (EMI), commonly called noise. Noise
adversely impacts motor performance by inducing stray signals.
Effective techniques to counter EMI include filtering the AC power,
shielding and separating signal carrying lines, and practicing good
grounding techniques.

To help avoid EMI:

•

Filter AC power by using isolated AC power transformers or
properly installed AC line filters.

•

Physically separate signal lines from motor cabling and power
wiring. Do not r oute signal wires with motor and power wir es, or
over the vent openings of servo drives.

Building Your 8720SM Motor Cables

•

Ground all equipment using a single-point parallel ground system
that employs ground bus bars or large straps.

Refer to System Design for Control of Electrical Noise Reference
Manual (GMC-RM001x-EN-P) for information on additional electrical
noise reduction techniques.

Proper cable construction and routing improves system
ElectroMagnetic Compatibili ty (EMC). Refer to the 8720MC High
Performance Drive Installation Manual (publication
8720MC-IN001x-EN-P) for information regarding cable const ruct i on.

Publication 8720SM-IN001A-EN-P — February 2003

8 8720SM High Perform a n ce AC Induction Motors

Guidelines for Installing Your Motor

Observe the following for installing your motor:

ATTENTION

!

•

Allow sufficient clearance in the area of the motor for it to stay
within its specified ope r ating temperature as well as protected
from direct splash or spray of cutting fluids or lubricating oils.
Refer to Before Mounting Your Motor for additional information.

•

Refer to Using Belted Drives and Coupled Drives to determine
proper installation in r ega rd to using belted and coupled drive s .

•

Mount your motor on a rigid, solid base, or foundation. Poor base
construction may cause resonances i n the motor/base assembly,
which can result in bearing failure and other motor damage. Use
the correct grade of hold down bolt s for the type of mounting.
Refer to Specifications for recommended bolt torque values.

Only qualified electrical personnel familiar with the
construction and operation of this equipment and the
hazards involved should in st al l, adjust, operate, and/
or service this equipment. Failure to observe
precaution could result in severe bodily injury or loss
of life.

•

Determine that you hav e prop erl y cons truc ted ca bles availab le fo r
your application. Refer to the 8720MC High Performance Drive
Installation Manual (publication 8720MC-IN001x-EN-P) for
information regarding cable construction.

Publication 8720SM-IN001A-EN-P — February 2003

8720SM High Performance AC Induction Motors 9

Wiring Your 8720SM Motor Power

The procedures in this section assume yo u have installed your 8720SM
motor correctly. This section includes:

•

determining conduit box orientati on

•

wiring your motor power

•

determining your feedback connections

•

verifying thermal protector (thermostat leads) connections

Determining Conduit Box Orientat ion

The standard conduit box location for to tally enclosed motors is top
mounted for left or right conduit entry without motor disassembly.
The 8720SM motors allow rotation of the conduit box in 90 degree
increments for lead outlet at front, back, or sides.

Wiring Your Motor Power

To wire your 8720SM three-phase motor power:

1. Bring 4 wire shiel de d Be ldon VFD cable or equal to these

connections. For applic ati ons above 130A, use thick insul a tion
lead wire such as RHW-2 or equal and thread the wires through a
single grounded metal conduit.

8720SM Motor: 8720MC Drive (TB1 terminal):

U (T1) U
V (T2) V
W (T3) W

Shield

Clamp

Publication 8720SM-IN001A-EN-P — February 2003