Instruction Manual
MONARCH GX
3 Phase Squirrel Cage
Induction Motors
TECO Australia Pty. Ltd.
MONARCH GX (ME) Installation and Maintenance Manual
Cast Iron TEFC Squirrel Cage Induction Motors
1. HANDLING AND STORAGE
Motors should preferably be stored in their normal orientation. They should be stored in a clean, dry location
away from vibration. Motors with shaft clamps should be stored with the clamps in place.
If motors have been exposed to moisture during long periods of storage then the insulation resistance of the
windings to the frame (earth) should be checked with the aid of a megger (max. d.c. voltage 500V) prior to
installation. Note do not megger Thermistors.
If any motor damage is to be claimed as “warranty”, TECO Australia must be consulted prior to any work being
carried out on motor.
2. INSTALLATION AND OPERATION
Motors should be installed to the requirements of AS3000:2007 SAA Wiring Rules or in line with local
regulations.
The installation of the equipment shall be carried out in a manner that does not reduce the protection afforded
by the equipment design.
When installing the motor the following points should be carefully checked:
rated voltage and frequency
ambient temperature should not exceed 40C, unless confirmed with TECO sales office
altitude does not exceed 1000 meters above sea level
correct connection of motor (see below)
any shaft seals are correctly seated to ensure IP protection
The use of the motor should conform to the specified degree of protection in accordance with AS60034.5-
2009.
Care must be taken to ensure that the cooling air can flow is unhindered. The space between the air i ntake
and the nearest wall should be approximately equal to the shaft height of the motor. Foundations must be
designed in such a way that vibration is avoided when the motor and the driven machine are runnin g coupled.
Care should be taken to ensure that any condensate drain holes/plugs are located at the lowest point of motor
casing. Any shaft clamps to prevent damage to the bearings in transit, must be removed before motor is put
into operation. Before mounting the transmission parts, the motor shaft should be cleaned with a solvent.
Secure the motor to a level surface. Unevenness leads to mechanical deformation of the motor. The motor
should be used only with coupling systems which are elastic with respect to centre offset, angular
displacement, longitudinal shift and torsional strain. Rigid coupling s ystems are not permissible (unless
previously agreed).
If direct coupling is employed check centre offset and angular offset with test arm and dial gauge. The
following deviations should not be exceeded:
Centre offset (radial measurement) 0.03 mm in 2 pole motors. 0.05 mm in motors with more than
2 poles. (the dial shows twice the value of the deviation).
Angular offset (axial measurement) 0.10 mm.
Check alignment at normal operating temperature.
With applications involving belt transmission, unnecessary axial forces on the bearings can be avoided by
positioning the shafts parallel to each other and keeping the pulleys perfectly aligned. The belt tension should
be just sufficiently stretched to prevent slipping in service. If the pulleys are too small the motor shaft is subject
to a high bending force which can result in shaft failure.
The connections for standard MONARCH three phase motors is –
Star connected 415 Volt up to and including 3kW
Delta connected 415 Volt 4kW and larger
This connection is indicated on the connection diagram inside terminal box lid.
TECO Australia Pty Ltd MM-20170203
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MONARCH GX (ME) Installation and Maintenance Manual
Cast Iron TEFC Squirrel Cage Induction Motors
For special voltages and the like, different connections will be noted on the motor nameplate beside the
voltage.
If the phases L1, L2 & L3 are connected in sequence with the motor terminals U1, V1 and W1, the direction of
rotation is clockwise if motor viewed from the drive end. Procedure for reversing the direction of rotation:
Interchange any two incoming main leads.
All Motors – apart from a few exceptions are suitable for operation in both directions. In the case of motors
intended for only one direction (with uni-directional fan), the direction of rotation is indicated by an arrow.
Two speed motor connection diagrams –
Dual Wound motors are: 4 / 6 pole, 6 / 8 pole speeds
Tapped Wound Motors are: 2 / 4 pole, 4 / 8 pole speeds
3. CLEANING, LUBRICATION AND MAINTENANCE
Periodical checking of the magnetic starter (where used) is recommended, in order to prevent serious
problems developing such as oxidation and poor electrical contact.
The intake and outlet openings as well as the channels between the cooling fins must be kept clean and
protected against clogging to prevent motor overheating.
For motors up to frame size D180, these are generally not fitted with grease nipples. This means that greasing
can only be carried out during general overhauls when the motor is disass embled.
Motors in frame size D180 and larger have greasing facilities and are factory lubricated for the initial start up
period prior to commissioning.
1) D180-315L Lubrication should be performed as follows prior to use:
a) Clean the grease nipples with clean cloth
b) Whilst motor is running, introduce new grease until all the old grease is purged from the grease
relief vents located at the bottom of the endshield
2) D355-400 Lubrication should be performed as follows prior to use (motor off):
c) Motor D355 and larger Non Drive end requires fan cover to be removed
d) Remove the grease relief screwed plug underside of the bearing cap before pumping new grease
e) Run motor for short period (5 minutes) with fan cover on and plug out to allow excess grease to
escape
f) Switch off motor, remove fan cover and refit screw grease relief screwed plug
TECO Australia Pty Ltd MM-20170203
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MONARCH GX (ME) Installation and Maintenance Manual
Cast Iron TEFC Squirrel Cage Induction Motors
Grease Type: SKF LGHP 2 is a premium quality grease, mineral oil based using Polyurea (di-urea) thickener.
It has excellent lubrication properties for a wide temperature range from -40 °C (-40 °F) up to 150 °C (302 °F).
This grease replaces the SKF high temperature grease LGHQ 3
Compatibility with common Polyurea greases
Compatibility with lithium complex thickened greases
LUBRICATION INTERVALS
Re-lubrication interval
Bearing No. Poles
Standard condition Severe condition
Grease quantity (grams)
Initial Replenishment
6211
6212
6309 2 2 years 1 year 38 g 25 g
6311 NU311 2 180 days 60 days 60 g 40 g
6312 NU312 2 180 days 60 days 75 g 50 g
6313 NU313 2 90 days 30 days 98 g 65 g
6314 NU314 2 90 days 30 days 120 g 80 g
6315 NU315 2 90 days 30 days 135 g 90 g
6316 NU316 2 90 days 30 days 150 g 100 g
6317 NU317 2 60 days 20 days 160 g 110 g
6318 NU318 2 60 days 20 days 180 g 120 g
6319 NU319 2 60 days 20 days 180 g 120 g
6211
6212
6311 NU311 4 - 8 2 years 1 year 60 g 40 g
6312 NU312 4 - 8 210 days 70 days 75 g 50 g
6313 NU313 4 - 8 210 days 70 days 98 g 65 g
6314 NU314 4 - 8 210 days 70 days 113 g 75 g
6315 NU315 4 - 8 210 days 70 days 135 g 90 g
6316 NU316 4 - 8 210 days 70 days 165 g 110 g
6317 NU317 4 - 8 90 days 30 days 195 g 130 g
6318 NU318 4 - 8 90 days 30 days 225 g 150 g
6319 NU319 5 - 8 90 days 30 days 225 g 150 g
6320 NU320 4 - 8 90 days 30 days 225 g 170 g
6322 NU322 4 - 8 90 days 30 days 315 g 210 g
6324 NU324 4 - 8 90 days 30 days 390 g 260 g
2 180 days 60 days 27 g 18 g
2 180 days 60 days 35 g 23 g
4 - 8 2 years 1 year 27 g 18 g
4 - 8 210 days 70 days 35 g 23 g
For other bearing sizes please refer to TECO
Motors with shielded bearings, suffix “ZZ” (i.e. 6206ZZ) are greased for life and do not have regreasing
facilities.
Definitions
Standard conditions: 8 hour operation per day with rated or light loading in a clean low-vibration environment.
Severe conditions: 24 hour operation per day with rated/light loading or in a dirty/dusty environment or where
the motor is subject to vibration/light shock loading.
TECO Australia Pty Ltd MM-20170203
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MONARCH GX (ME) Installation and Maintenance Manual
Cast Iron TEFC Squirrel Cage Induction Motors
4. PROTECTION / AUXILIARY DEVICES
Thermistors
Are fitted to frame sizes D160 and larger and are generally terminated in the main terminal box unless
otherwise specified. Thermistors are positive temperature coefficient type, one fitted per phase (1000 ohm
each @ tripping temperature = 3000 total) with a trip temperature to suit motor insulation class. Connect
thermistor leads to a thermistors control relay from a reputable supplier.
Anti-condensation Heaters
If the motor is provided with Anti-condensation Heaters (if specified / ordered, check for nameplate), the
incoming supply to the heaters is shown on the heater nameplate. The heater circuit should be de- energised
when the motor is running.
5. FAULT FINDING & RECOGNITION
Kind of Fault Symptom Cause Remedy
Fail to
Start without
Load
Overload after
start
Overload after
Start
Motionless
And soundless
Fuse blowing –
(Circuit Breaker trips
off, slow start with
electromagnetic noise
Fuse blowing –
Fail to restart due to
circuit breaker
tripping
Overheating
of Motor
Power-off Consult power company
Switch-off Switch-on
No fuse Install fuse
Broken wires Check wires and repair
Broken lead Check leads and repair
Faulty winding Check winding and repair
Short circuit Check circuit
Incorrect wiring Check wiring
Poor contact in circuit
switches
Broken wiring Check and repair
Poor contact of starting
switch
Incorrect connection of
starting switch
Insufficient capacity of fuse
or breaker
Overload Lighten load
High load at low voltage Check circuit capacity and
Overload or Intermittent
Overload
Under-voltage Check circuit capacity and
Over-voltage Check power source
Check and repair
Check and repair
Check and repair
Replace fuse or breaker
reduce load
Lighten Load
power source
Fuse blowing (Single phase
rotating)
Poor contact of circuit
switches
Poor contact of starting
switch
Unbalanced three phase
voltage
Speed falls sharply Voltage drop Check circuit and power
Sudden overload Check machine
Single phase rotating Check circuit and repair
Overload after
Start
Switch overheat Insufficient capacity of switch Replace switch
High load Lig hten load
Bearing Overheat Misalignment between motor
and load
High bearing noise Replace damaged bearing
TECO Australia Pty Ltd MM-20170203
Install the specified fuse
Check and repair
Check and repair
Check circuit or consult
power company
source
Re-align
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MONARCH GX (ME) Installation and Maintenance Manual
Cast Iron TEFC Squirrel Cage Induction Motors
Kind of Fault Symptom Cause Remedy
Noise Electro-magnetic
noise induced by
electricity
Bearing noise Not enough grease Add grease
Mechanical noise
caused by machinery
Mechanical noise
caused by machinery
Vibration Electro-magnetic
vibration
Vibration Unbalanced rotor Repair
Mechanical vibration Broken fan blade Replace fan
Occurrence from first
operation
Sudden sharp noise and
smoking
Deterioration of grease Clean beari ng and re-
Excessive noise Replace the damaged
Loose belt sheaf Adjust key and lock the
Loose coupling Adjust the position of
Loose screw Tighten screw
Fan rubbing Adjust fan position
Rubbing as a result of
ingress of foreign matter
Wind noise Noise induced by air
Induced by conveyance
machine
Short circuit of windings Repair
Open circuit of rotor Repair
Unbalanced fan Repair
Un-symmetrical centres
between belt sheaf
Central points of couplings
do not lie on the same level
Improper mounting
installation
Motor mounting bed is not
strong
Check noise not normal
Short circuit of windings.
Repair.
grease
bearing
screw
couplings and tighten
Clean motor interior and
ventilation ducts
flowing through ventilation
ducts
Repair machine
Align central points
Adjust the central points of
couplings on the same
level
Lock the mounting screw
Reinforce mounting bed
www.teco.com.au e-mail: emd@teco.com.au
TECO Australia Pty Ltd MM-20170203
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