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Rotek RX 18.5 Kw 3 Phase 8 Pole Motor

Series: RX

Source: https://press.siemens.com/global/de/pressemitteilung/siemens

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The Rotek RX 18.5 Kw 3 Phase 8 Pole Motor is a three-phase induction motor. The rated output is 18.5 kW. The motor is eight-pole, which at 50 Hz gives a synchronous speed of 750 rpm. The rated voltage is 400 V. The housing is frame size 225 S in foot-mounted form. The protection class is IP55. The efficiency is 90.8 per cent at full load, 90.9 per cent at 75 per cent load and 88 per cent at half load. At full load it delivers 242 Nm. The mounting arrangement to IEC 60034-7 is B3. The motor is built in China. The values are recorded in the Australian MEPS registration under standard AS/NZS 1359.5:2004; measured to AS 1359.102.1:1997. Rated output across the Rotek range ranges from 0.18 to 160 kW; the RX 18.5 Kw 3 Phase 8 Pole Motor sits at the bottom of that range with 18.5 kW. Its immediate neighbours are the RXQ 15Kw 3 Phase Vertical 2 Pole Motor below it with 15 kW and the 180L-4 above it with 22 kW. 132 Rotek models are on record. The model is listed under Electric motors. 23 verified figures from 1 source are on file.

Technical data

Engine

Rated output18.5 kWcorrect

Electrical data

Rated voltage400 Vcorrect
Number of poles8correct
Protection classIP55correct
Frame size225 S (foot)correct
Mounting (IEC 60034-7)B3correct
Efficiency at full load90.8 %correct
Efficiency at 75 % load90.9 %correct
Efficiency at half load88 %correct

Origin and approval

Country of manufactureChinacorrect
Standard appliedAS/NZS 1359.5:2004correct
Test methodAS 1359.102.1:1997correct

Frequently asked questions

How much power does the Rotek RX 18.5 Kw 3 Phase 8 Pole Motor have?

The Rotek RX 18.5 Kw 3 Phase 8 Pole Motor delivers 18.5 kW.

What to check before buying

  • Match the data plate against the order: frame size, mounting and rating have to agree.
  • Check the ingress rating against the installation site — outdoors or in dust the demands differ.
  • Hold the mounting form and dimensions against the existing seat before ordering.
  • The pole count sets the speed — when replacing an older unit, compare this first.
  • For used units, ask about winding condition and bearing play.
  • Ask about parts availability for this series — the running costs hang on it.

A general list for this type of machine — no substitute for an inspection or an appraiser.

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This page carries 23 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.

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Other models in this series

RX 11 Kw 3 Phase 2 Pole Motor

RX 11 Kw 3 Phase 6 Pole Motor

RX 110 Kw 3 Phase 2 Pole Motor

RX 132 Kw 3 Phase 4 Pole Motor

RX 15 Kw 3 Phase 4 Pole Motor

RX 15 Kw 3 Phase 8 Pole Motor

RX 15 Kw 3 pHase 2 Pole Motor

RX 160 Kw 3 Phase 4 Pole Motor

RX 18.5 Kw 3 Phase 2 Pole Motor

RX 18.5 Kw 3 Phase 4 Pole Motor

RX 22 Kw 3 Phase 2 Pole Motor

RX 22 Kw 3 Phase 4 Pole Motor

Sources: [1]

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