Motor application：

The EG series three-plese industrial standard motors are specifically designed in accordance with IEC publications and national standard specifications as CEI,DIN and VDE。 The EG series has been designed and engineered in compliance with the lasest technical knowledge and production process,and has reached a hign standard in both of three fields. EG series has been designed and made in compliance with the latest technical knowledge and production process,and has reached a high standard in both of three fields.

Product attribute：

1. Technical Description

1.1 General Information

● Regulation

The technical design of the motors si in accordance with IEC 60034-1 and IEC 60034-72.The table below lists those regulations corresponding to IEC 60034-1 and in particular those apecifications which the EG series motors comply with .

● International Regulations

IEC 60034-1

● National regulations

Italy CEI 2-3,VI/1967

Federal Republic of Germany VDE0530

Belgium NBN7/1963, Supplement

Denmark DS 5002/1958 France NFC 51-200/1964 NFC 51-100/1969

Great Bretain BS 2613/70 Supplement 1971 BS3979

Netherlands NEN 3137/1967

Norway NEN 41.69-49.72

Sweden SEN 2601/1974

Switzerland SEV 3009/1966

Regulations applicable to furthnical details are listed in the following table:

Thus,EG series motors comply with the regulations of European coentries to great extent.

● Types of Construction and Protection Classification

EG motors are delivered totally enclosed and surface ventilated and surface ventilated.The motors meet the requirements of the following protectiong classification according to IEC60034-5;

80 to 355 mm shaft height:IP55

Construction to terminal boards meet IP55 enalosure requirements.The compression gland/cable seal meets IP55 enclosure requirements.

● Rating and Type of Duty

Rating are applicable to SI(IEC 60034-1)continuous operating under the following condition:

·Temperature of coolant:<40⁰C

·Altitude above sea level:<1000m

·Operating voltages of basic desing

·Operating frequency:50HZ

● Tolerances

For the ratings specified in this technical information,the following tolerances are admissible in accordance with IEC60034-1:

Efficiency -0,15(1－η)

Power factor (1?Λ)/6

Slip ±20%

Starting current ±20%

Starting torque -15÷+25%

Breakdown torque ±10%

1.2. Mechanical Chaaracteristics

Over the entire rating,the EG series is in rugged grey cast iron design.This allows

The motors of the basic design to be dynamically,loaded up to avalue of 3g when the weight of transmission elements si taken into consideration. IN addition,the grey cast iron design is ideal for use in all environmental conditions.

Frame size H80-280 have feet that are removabel as they are bolted on separately,315-355 have feet that are integrally cast.Pressure die cast aluminium bodies for frame size 80-160 can be supplied on request.

● Stator

The wrapped stator core assembly is a press fit in the finned grey cast iron casing.The centering spigots are machine finished in order to achieve a symmetrical air gap.

● Rotor

Due to the aluminium diecasting design of the squirrel cage,the rotor body forms a compact unit. A non positive-positive special seating provides connection of the squirrel cage with the shaft. Final finishing is done when the rotor is complete. It is dynamically balanced with the feather key being fully seated. The driving elements to be mounted on the shaft must be balanced without a feather key. The basic design of EG motors is with one shaft end but they can be supplied with a second shaft extension at the nondriving-end.In general, the second shaft end is designed for torsion load only. Permissible load of second shaft extension:

·EG 80 to 112: max.50% of rated power

·EG 132 to 355: max.100% of rated power

● Bearings

Low noise bearinga are used.

For the floating bearings system,the antifriction bearings are axially to achieve low-noise running.The bearings of the basic model are prelubricated. In normal load and normal environmental conditions,the initial quantity of grease without regreasing for the following periods:

·EG80-355 10000-20000 running hours

For regreasing,other antifrictiongrease types may be used in accordance with "Lubricant grades for standard motors".This list is attached to our installation,operating and maintenance instructions.

From the EG 160 type, standard version,there is a re-lubricating device.

● Cooling System

The EG motors are surface cooled by means of IC 41 cooling system in compliance with IEC60034-6.Operation of the ventilation system is independent of the direction of rotation.

● Terminals

Connection of the motor is universally on pin-type terminals. The terminal block with pin-type terminals and a marked terminal for the earthing conductor are provided in a generously designed terminal box that is easily accessible and placed on the top of the casing. The terminal box may be turned through 90°to either side, in order to allow the necessary directions for connections to be made.

The terminal box is provided with two entrance holes. The entrance hole for leads of thermostats is available upon request.

● Surface Protection

All components are given a protective prime coating before assemblying.The final surface protection is an application of a special coating of paint,using nitro combination.

The colour is RAL 7031 or provided on request.

1.3.Electrical design

● Magnetic Elements

The magnetic elements for both the rotor and the stator are low-carbon electrical steel sheets. Maximum magnetizability and low loss coefficient are obtained by a special annealing treatment of the laminations.

The stator core assembly is riveted,welded or bracked.

● Windings

Stator windings of EG motors are exclusively made of enamelled copper wire.For the majority of types,windings are made on automatic winding machines.The number of slots and the kind of windings vary depending on running properties and performance characteristics.

Electrical and mechanical strength of stator windinga is ensured by impregnating them with trickle resin or impregnating varnish weth a haigh solid content.

The rotor winding is of the squirrel cage type in diecast aluminium.The rotor slots are designed to give maximum starting capacity.

● Temperature Class

EG motors are insulated according to temperature class F.

● Voltage and Frequency

The basic model of EG motors is supplied for the following service voltages:

·230/400V△/Y ·400/690V△/Y

The operating frequency is 50 Hz,in each case.According to IEC 60034-1,the maximum permitted tolerance for the voltage applied is ±10%.For some larger motors the 230/400 voltage is available on request only.Voltages and frequencies other than those specified can be obtained if technically feasible.

1.4.Special Designs

Modification and special designs that are technically necessary will be derived from the standard basic series.

1.5.Design Engineering Nots

● Determination of Rated Torque

Using the date listed in the rating table the rated torque of a motor can be calculated with the formula:

M=(P×9550)/n (in Nm)

Where P=Power rating in KW n=Rated speed in RPM

● Moment of inertia

The moment of inertia(J) of the rotating parts of a motor is given in kgm² in the rating table.For conversion to the flywheel effect WD² in use to date,the following formula is applicable:

WD²=4×J

Where WD²=Flywheel effect in kgm²

J=Moment of inertia in kgm²

Further information will be furnished on request when the specific drive application is known.