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Baldor M4C 280S-8

Series: M4C

Source: https://baldor.co.id/

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The M4C 280S-8 belongs to the M4C series from Baldor. The rated output is 37 kW. The motor is eight-pole, which at 50 Hz gives a synchronous speed of 750 rpm. The rated voltage is 415 V. The housing is frame size 280 S in foot-mounted form. The protection class is IP55. The efficiency is 93.5 per cent at full load, 92.9 per cent at 75 per cent load and 91.5 per cent at half load. The motor weighs 534 kg. At full load it delivers 475.8 Nm. Mounting arrangements to IEC 60034-7: B3, B5, B14, B34 and B35. The motor is built in China. The figures come from the Australian MEPS register under the GEMS Determination 2012; measured to AS 1359.102.1:1997. The M4C series covers 19 models. Rated output within it ranges from 4 to 55 kW; the M4C 280S-8 sits in the upper part of that range with 37 kW. Its immediate neighbours are the M4C 250M-8 below it with 30 kW and the M4C 280M-8 above it with 45 kW. 841 Baldor models across 3 series are on record.

Baldor M4C – the range of slow-running three-phase motors from China, six- and eight-pole, frame sizes 160 to 280, 4 to 55 kW, part of ABB since 2011

Baldor Electric, founded in 1920 in St. Louis and now headquartered in Fort Smith, Arkansas, has been an ABB subsidiary since the 2011 takeover. The M4C range belongs to the metric M4 motor family for IEC frame sizes and here covers exclusively the slow-running six- and eight-pole versions; type designations follow the scheme of range code, frame size, build length and pole count, such as M4C 200L1-6 for frame size 200, length L1, six-pole.

Read on 3 more paragraphs

The register lists here 19 versions with 4 to 55 kW, six- to eight-pole, full-load efficiencies from 84.3 to 94% and at 75% load from 83.4 to 93.8%. Frame sizes run from 160 to 280, supply voltage from 400 to 415 V, protection is consistently IP55. Manufacturing is in China, testing used test method B under the 2012 GEMS determination; none of the 19 motors reaches a High Efficiency Level.

As a pure six- and eight-pole range, M4C covers slow-running, high-torque drives, such as agitators, conveyors and low-speed fans, a market segment where Baldor traditionally stands alongside brands such as Toshiba and WEG.

When buying used, bearing condition and a checked insulation resistance of the winding, the condition of shaft and key, visible overheating marks on the terminal box and fan cover, and a legible nameplate with frame size, pole count and mounting code matter; on the large, slow-running frame sizes from 250 up, the lifting eyes and foundation fixing are also worth a look. Spares and service run through the Baldor/ABB network.

Sources: SpecCodex register, model data: Baldor M4C, Baldor Electric (ABB, Hersteller)

Technical data

Engine

Engine familyM4C 280S-8correct
Engine familiesM4C 280S-8correct
Rated output37 kWcorrect

Dimensions and weights

Weight534 kgcorrect

Electrical data

Rated voltage415 Vcorrect
Number of poles8correct
Protection classIP55correct
Frame size280 S (foot)correct
Mounting (IEC 60034-7)B3, B5, B14, B34, B35correct
Efficiency at full load93.5 %correct
Efficiency at 75 % load92.9 %correct
Efficiency at half load91.5 %correct

Origin and approval

Country of manufactureChinacorrect

Other data

Standard appliedGreenhouse and Energy Minimum Standards (Three Phase Electric Motors) Determination 2012correct
Test methodAS 1359.102.1:1997correct

Frequently asked questions

How much power does the Baldor M4C 280S-8 have?

The Baldor M4C 280S-8 delivers 37 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 27 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

M4C 160L-6

M4C 160L-8

M4C 160M-6

M4C 160M1-8

M4C 160M2-8

M4C 180L-6

M4C 180L-8

M4C 200L-8

M4C 200L1-6

M4C 200L2-6

M4C 225M-6

M4C 225M-8

Sources: [1]

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