S1 Motor

Title

S1 Motor

Brief Introduction

For a . c . stator windings of machines having a rated output less than 5000 kW ( or kVA ) but greater than 200 kW ( or kVA ) the manufacturer shall choose either the resistance or the ETD method , uniess otherwise agreed .

For a . c . stator windings of machines having a rated output less than or equal to 200 kW ( or kVA ) the manufacturer shall choose the direct measurement version or the superposition version of the resistance method ( see 8.6.2.1), uniess otherwise agreed ( but see aiso below ). For machines having a rated output less than or equal to 600 W ( or VA ), when the windings are non - uniform or severe complications are involved in making the necessary connections , the temperature may be determined by means of thermometers . Temperature rise limits in accordance with Table 8, item 1d) for resistance method shall apply .

The thermometer method is recognized in the following cases :
a ) when it is not practicable to determine the temperature rise by the resistance method as , for example , with low - resistance commutating coils and compensating windings and , in general , in the case of low - resistance windings , especially when the resistance of joints and connections forms a considerable proportion of the total resistance ;
b ) single layer windings , rotating or stationary ;
c ) during routine tests on machines manufactured in large numbers .
For a . c . stator windings having only one coil - side per slot , the ETD method shall not be used for verifying compliance with this document : the resistance method shall be used .

NOTE For checking the temperature of such windings in service , an embedded detector at the bottom of the siot is of little value because it gives mainly the temperature of the iron core . A detector placed between the coil and the wedge will follow the temperature of the winding much more closely and is , therefore , better for checks in service . Because the temperature there may be rather low , the relation between it and the temperature measured by the resistance method should be determined by a thermal test .

For other windings having one coil - side per slot and for end windings , the ETD method shall not be used for verifying compliance with this document .

For windings of armatures having commutators and for field windings , the resistance method is recognized . For stationary field windings of d . c . machines having more than one layer the ETD method may be used .

Main Technical Parameters

Application

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