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5.2.6 Anti-condensation heating (option K45)

Larger motors are prone to more frequent condensation on the winding caused by the climatic

conditions because of the larger surfaces. Condensation can occur, for example, when motors

are not operational in a humid environment or if motors are exposed to signi󹪝cant temperature

󹪞uctuations. Anti-condensation heaters heat the air in the motor by a few Kelvin above the

ambient temperature and thus prevent precipitation inside the motor.

For 1PH8 motors, using option K45, order anti-condensation heating for shaft heights 180,

225 and 280. Option K45 comprises an anti condensation heater attached to the winding

overhang with a heating power of 100W for a supply voltage of 230V AC (50/60 Hz). The 2

connection ends are routed into the main motor terminal box. Connect this via the auxiliary

terminal strip. The connection ends are marked "1HE1" and "1HE2".

Note:

• For shaft heights 180, 225, 280, the same strip heater is used.

• Do not switch on the anti-condensation heating while the motor is operational.

• The anti-condensation heaters for 1PH8 motors are UL-approved.

• In addition to the anti-condensation heating, for motors with degree of protection IP55,

always take into consideration the condensation drain holes (Chapter "Condensation drain

hole (option L12)").

5.2.7 Condensation drain hole (option L12)

In larger motors, there is a risk of condensation or accumulation of condensed water inside the

motor due to the climatic conditions. Condensation drain holes prevent the accumulation of a

damaging quantity of water in the motor. These are frequently used as the primary measure

against condensation as they are easy to implement in the design.

For 1PH8 motors, the condensation drain holes are located at the lowest point in the NDE

and DE end shields. As a consequence, they are only suitable for horizontal mounting in

types of construction IM B3, IM B5 and IM B35. The condensation drain holes for shaft heights

180 and 225 are provided with a special insert (drainage plug); this insert is not required for

shaft height 280.

Motor components and options

5.2Options

1PH8 SIMOTICS M main motors

198 Con󹪝guration Manual, 12/2022, A5E51895839A

Siemens SIMOTICS M-1PH8 Configuration Manual

Other manuals for Siemens SIMOTICS M-1PH8