| Download Technical Files |
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| SGA Series Brochure [1.7mb] |
| HGA Series Brochure [313kb] |
SGA & HGA Series motors
Standard (SGA) & MEPS2-compliant (HGA) range of motors, three phase squirrel cage TEFC with IEC frame sizes from 71 to 355. They combine high efficiency and excellent electrical characteristics with the robust strength of cast iron.
The standard design includes single speed 2, 4, 6 and 8 pole as well as a comprehensive selection of 2 speed motors.
| HGA Series (MEPS2) |
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Building on the proven performance of the popular SGA series, CMG has developed the HGA series to meet the demands of more efficient motors. Incorporating all of the mechanical features of the SGA series, the HGA series complies with the new Australian standard for minimum efficiency (MEPS2). |
| SGA Features | |
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Standards and Specifications
The main dimensions and rated outputs of CMG type SGA motors generally conform to Australian Standard AS1359 and International Standards IEC60034 and IEC60072.Compliance with IEC60034 means that many standards from other countries based on IEC60034 can normally be complied with. SGA MEPS compliance
SGA motor efficiency levels comply to the Minimum Efficiency Requirements as per AS/NZS 1359.5:2000, test method B. Many of the motors in the SGA range actually comply to the high efficiency requirements of the same standard.Degree of protection
Standard levels of enclosure protection for all SGA frame sizes for both Motor and Terminal box is IP55, with IP56, IP65 and IP66 available on request.
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In addition to the standard design the range includes: SGAB - Brake motors SGAE - Hazardous location Ex 'e' SGAN - Hazardous location Ex 'n' SGAD - Hazardous location DIP SGASS - Smokespill application SGACT - Cooling tower application SGAM - Aggressive environment / mining application SGAR - Airstream rated for Axial flow fans Insulation
All units are supplied with class 'F' insulation, with temperature rise being limited to less than 80K (unless otherwise marked). This provides the end user with a wide safety margin under general operating conditions.In addition we offer motors wound with H Class insulation, and temperature rise still limited to 80K. SGAH - High ambient temperature application SGAHS - H Class smokespill application Additional protection is provided by installation of thermistors in all units from SGA 160 frame upward, to continuously protect the winding. The conservative rating of CMG type SGA motors provides additional operational safeguards, ensures long unit life, and renders this series inherently suitable for most arduous mining, industrial or agricultural applications. |
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Airstream motors for axial fans – SGAR
CMG offer a comprehensive range of motors specifically
built for use with axial flow fans, where the motor is
mounted in the airstream.Provided the airstream ensures ample cooling, the fan and cowl normally fitted to a standard TEFC motor is redundant. Enclosure rating of the motor is also improved with the use of a solid rear endshield. Due to the elimination of losses associated with the motor fan SGAR motors have a higher efficiency than standard SGA motors. For ease of installation in the fan duct the motor terminal box is usually fitted with the conduit entries facing the rear of the motor. SGAR series motors are normally available ex stock in frame sizes 80 to 180, 4 pole 0.55 to 22 kW and 6 pole 0.37 to 15 kW. (Other sizes available on request). |
Cooling tower – SGACT
CMG SGACT cooling tower motors are specially
developed for operation in air stream rated cooling
towers. SGACT motors are available in frame sizes 80
to 355, and rated power outputs of 0.37 to 315 kW.Applications
SGACT motors are ideally suited to the cooling tower
application, in industries such as food and beverage,
airconditioning, chemical processing, and petrochemical.Protection
CMG SGACT motors have a protection rating of IP66 for
maximum protection against water and dust.Additional enhancements
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Motors for hazardous areas – SGAE/SGAN/SGAD
Motors used within a hazardous location require a higher
level of protection against the risk of harmful
occurrences. CMG SGA motors are available in the
three most common high protection configurations, Ex e,
Ex n and DIP, supplied with protection ratings IP65 or
IP66. SGA Hazardous area motors are available in
motor frame sizes 71 to 250. Larger sizes are under
development.Combinations of protection such as Ex e and DIP or Ex n and DIP are also available. Australian Standards
AS 2381.1-1991 and AS 2381.10-1995 specify general
requirements for the selection of electrical equipment,
and its installation and maintenance to ensure safe use
in areas where flammable materials are generated,
prepared, processed, handled, stored or otherwise used,
and which are therefore potentially hazardous.
The term ‘flammable material’ includes gas, vapors,
liquids, mists, solids and dusts, but does not include
those materials which are specifically manufactured as
explosives or materials which are inherently explosive.
The requirements of the listed standards apply only to
the use of electrical equipment under normal or near
normal atmospheric conditions. The requirements
specified for hazardous location electrical equipment are
supplementary to and not alternative to any
requirements which would apply to equipment and
installations in non-hazardous areas.
(see AS3000-1991).Paint
Standard color finish for the hazardous area range is
grey, with primary options of yellow for SGAE and
SGAN, and green for SGAD. Other colors are available on request.
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Smokespill application - SGASS/SGAHS
Smokespill application motors are designed to withstand
the extreme environmental conditions associated with a
building fire. Ventilation systems within public buildings
are required to continue providing smoke extraction for 2
hours at smokespill air temperature of 200°C or for 30
minutes at 300°C, designated respectively as rating-1 or
rating-2 in accordance with AS/NZS1668.1-1998.The standard SGASS range, wound with F class insulation in frame sizes 80A to 180L- 0.55 to 22kW- 2 to 8Pole meet the rating-1 requirements. SGAHS range, wound with H class insulation in frame sizes 80A to 200L- 0.55 to 30kW- 2 to 8Pole meet either rating-1 or rating-2 requirements. The standard SGA motor is inherently suitable for upgrading to the smokespill application due to its low temperature rise. When SGASS motors are ordered SGA F class motors are modified and when SGAHS motors are ordered SGA H class motors are modified in accordance with our standard operating procedures which include the following:
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