Rexnord-Stephan S4 Catalogue

04-2007 3P0200-XX7. Technical Appendix7.3.3 Type of enclosureThe motors correspond to type of enclosure IP55 to IEC 34 - 5 as standard, i.e. they are protected against harmfulpenetration of dust and water.The first code number IP5* identifies the protection against harmful dust accumulations inside the motor.The second code IP*5 identifies the protection against the penetration of jet water from all directions.Higher types of enclosure can be supplied upon request.7.3.4 Insulation classProven insulation materials according to class F are used for all motors (limiting temperature 155 °C). However,the actual heating corresponds only to insulation class B (limiting temperature 130 °C). Exception: size 132MG-4G (9 kW).This ensures high reliability and long service life. It is also possible to operate the motors under special conditions,such as an unfavorable electrical supply, an ambient temperature of 55 °C, or a permanently increased load of upto 110 % of the rated output.7.3.5 Protection against tropical influencesAll motors are designed in type of enclosure IP55 to IEC 34 - 5. They are suitable for use under dusty and humidenvironmental influences and, to a limited extent, in tropical environments.If the environmental conditions promote the formation of mildew, algae or condensate, an additional tropical insulationshould be provided.If motors are exposed to humid or condensate-forming conditions for an extended period of time, an electricalspace heater (option) is recommended to avoid moisture condensate inside the motor windings. A control devicemust ensure that the space heater is switched off during operation and switched on during standstill. The standardsupply voltage is 230 V ± 10 %.7.3.6 Protection of motors against non-permissible loadsSelecting the correct protective device largely determines the operational reliability and service life of the motor.Suitable overcurrent release devices (motor protecting switches) are placed in the supply line for direct protectionagainst overload and blocking.Motors with an output starting at 4 kW are equipped with thermistors (PTC thermistors) as standard. Motors withlower outputs can be supplied with thermistors or thermostats (thermal contacts) upon request (option). Standardmotors can be retrofitted with thermostats.Thermistors (PTC thermistors) are temperature-dependent resistors to IEC 34-11 and DIN 44081 / 44082.Technical data: see below.Thermostats (thermo switches, thermal contacts) are temperature-dependent bimetal switches. The response temperatureis 150 °C and cannot be adjusted. Technical data: see below.Selecting the correct motor protection is dependent upon the application:llllPossible causes of a thermal overload in each specific applicationValue of product being manufacturedCosts arising from loss of productionPossible dangers due to a motor faultT22