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Dry-Type Industrial Transformers

Dry-Type Insdustrial Transformers

Distribution transformers are so named because they distribute low voltage power (5KV and below) to the customers who use electricity at the end of the supply grid. "Dry type" simply means it is cooled by normal air ventilation. The dry type transformer does not require a liquid such as oil or silicone or any other liquid to cool the electrical core and coils. The transformer case is ventilated to allow air to flow and cool the coil(s). Because they are "dry-type" they contain no dangerous fluids and require no special fire proof vaults or venting of toxic gases. These safety features allow dry type transformers to be installed inside buildings and in locations close to the consumer, which improves overall transformer efficiency. Marcus dry type transformers are safe, highly efficient and trouble-free. They require minimum maintenance to provide many years of reliable trouble free service.

Supplied as either single or three phase, Marcus dry-type distribution transformers are easy to install and offer unique advantages over competitive brands. They are compact to save scarce floor or wall space and are all supplied with wall or floor brackets and channels. Furthermore, to facilitate trouble-free connecting of line and load cables, voltages are clearly indicated on separate terminal boards. All Marcus distribution transformers are manufactured with class 220˚ insulation materials and are designed to operate safely below maximum levels.

Some of the terms which refer to this same type of transformer are "isolating type", "double-wound transformer", "lighting transformer"," two coil transformer", "step-up" and "step-down" transformer.

Applications of Dry Type Distribution Transformers

Fire-resistant dry type or "cast resin" transformers are well suited for installation in high-rise buildings, hospitals, underground tunnels, school, steel factories, chemical plants and places where fire safety is a great concern. Hazard free to the environment, dry type transformers have over the years proven to be highly reliable. They are typically used in commercial, institutional, industrial, and residential structures.


Dry-Type Industrial Transformers Catalog


MS - Single Phase
General Purpose Transformer
For installation in indoor locations with a clean, dust free and chemical - free air circulation. Provides a degree of protection against incidental contact by non-authorized personnel

MT - Three Phase
General Purpose Transformer
For installation in indoor locations with a clean, dust free and chemical - free air circulation. Provides a degree of protection against incidental contact by non-authorized personnel

MK - Three Phase K-Factor
For Non-linear Loads
Specifically designed and engineered for safe, efficient handling of non-linear loads created by computers, video display terminals, electronic ballasts, fax and copy machines and programmable controllers.


MKS - Single Phase K-Factor

Specifically designed and engineered for safe, efficient handling of non-linear loads created by computers, video display terminals, electronic ballasts, fax and copy machines and programmable controllers.


MDI - Three Phase Drive Isolation

For use with AC and DC adjustable speed drives which generate mechanical stresses and harmonic currrents beyond the design criteria of normal general purpose transformers.

MSWP - Single Phase Outdoor

Enclosure 3R provides superior protection from rain, sleet or snow.

Also suitable for indoor use in tunnels, mines and pumping stations where dripping and splashing water is a problem.


MTWP - Three Phase Outdoor

Enclosure type 3R provides superior protection from rain, sleet or snow. Also suitable for indoor use in tunnels, mines and pumping stations where drilling and splashing water is a problem.


MTWP-SCR - Three Phase Outdoor Enhanced
Additional Protective Mesh Enhances the NEMA 3R Feature.
Ventilated, Dry-type transformers with weather buffer screens

Enclosure type 3R provides superior protection from rain, sleet or snow. Also suitable for indoor use in tunnels, mines and pumping stations where drilling and splashing water is a problem.

Restricts entry of blowing rain or snow without affecting normal cooling air flow

Lower costs and easier installation than sealed transformers

Lighter weight than non-ventilated and resin encapsulated alternatives

Perfect for open areas where exposure to wind, rain and snow is a problem

Typical Applications:
Roof Tops
Fresh water lake front docks
Pool Areas


RES - Single Phase Epoxy Encapsulated

Designed to withstand the harshest indoor and outdoor applications, our epoxy encapulated transformers are completely enclosed in Type 3R enclosures and provide safe, reliable protection from corrosive atmospheres, hazardous gases, dust and moisture. For use in pulp and paper plants, steel mills, petrochemical plants, food processing facilities, breweries, mines, marine and shipboard installations. Certified for Class 1, Division 2 group A-D locations with a temperature classification of T3C, T4 and T5. Available with 4X stainless steel enclosures.

RET - Three Phase Epoxy Encapsulated

Designed to withstand the harshest indoor and outdoor applications, our epoxy encapulated transformers are completely enclosed in Type 3R enclosures and provide safe, reliable protection from corrosive atmospheres, hazardous gases, dust and moisture. For use in pulp and paper plants, steel mills, petrochemical plants, food processing facilities, breweries, mines, marine and shipboard installations. Certified for Class 1, Division 2 group A-D locations with a temperature classification of T3C, T4 and T5. Available with 4X stainless steel enclosures.


MTWPCD - Three Phase Outdoor Ventilated

The Marcus model-CD (MTWPCD) transformer is for use in applications where Class 1 Division 2 is required. It is designed with a Type 3R enclosure and is built to withstand locations with hazardous gases, corrosive atmospheres and airborne pollutants. Typical Applications include: Mining, petrochemical and pulp & paper installations. Certified for Class 1, Division 2 group A-D locations with a temperature classification of T3C, T4 and T5. The benefits of the model-CD over the epoxy encapsulated transformer is in its lighter weight and lower cost.

MTZ- Marcus Harmonic Mitigating (Harmonic Sweeper)

Where to use Harmonic Sweeper™ (stand alone or in parallel with Marcus MT models)

In commercial, institutional and industrial buildings

With UPS or special generator groups

Industrial rectifier

PWM drives for elevators

UV filtering lights

Electronic ballast lighting

MTD - Double Harmonic Mitigating

The DOUBLE HARMONIC SWEEPERTM gives you the opportunity to treat the 3rd, 5th &
7th harmonics with a single transformer having a double secondary with both 0 degree and 30 degree phase displacement. Furthermore the DOUBLE HARMONIC SWEEPER has a low impedance with low voltage distortion, because the triplen harmonics are cancelled in the magnetic circuit and do not circulate in the primary winding. The 5th and 7th harmonics are eliminated due to the phase shift angle of 30° between the two outputs .

This harmonic cancellation transformer may be used with loads having a high content of 3rd,
5th & 7th harmonics like line-neutral rectifiers. The DOUBLE HARMONIC SWEEPER™ is an effective double phase shift transformer (similar to a delta/double zig-zag). Simply install the unit, split and equally balance the non-linear load between the double outputs, and the harmonic content will be effectively reduced.

MS-CC Single Phase Open Type Core & Coil

Designed for installation within cabinets where no additional individual enclosure is required. Suitable for feeding MCC's and switchgear where space is at a premium.

MT-CC - Three Phase Open Type Core & Coil

Designed for installation within cabinets where no additional individual enclosure is required. Suitable for feeding MCC's and switchgear where space is at a premium.

EUR-EX - Euro Export-Ready Transformers

Marcus Euro Export-Ready transformers are used to convert any standard 3 phase U.S. voltage to a standard 3 phase European voltage. This is useful when importing European machinery to the U.S. Additionally, these transformers when ordered in 50Hz can be connected in reverse to convert European power to U.S. power when importing U.S. machinery into Europe. Either way, these transformers are built to last, guaranteed!

Don't have floor space to mount your Euro Export-Ready transformer? No problem! Heavy duty wall mounting brackets are supplied on all Euro Export-Ready transformers up to 45KVA. Save your valuable floor space for your machinery instead of cluttering it with electrical equipment. When you wall mount this transformer in a warehouse, you no longer need to install concrete filled, steel barrier posts to protect the transformer from forklifts and other warehouse machinery.

Connections are made simple with Marcus’ Euro Export-Ready transformers. Jumpers are not necessary on the primary winding to change voltage because all voltages are brought to a solidly fixed terminal board for fast and easy connections. Dual taps are provided on the output board for 380 or 400volts Wye. Lugs are provided for easy and fast connection on the input and output side.



208 Volt Euro Export-Ready Transformers

208 volt input and 380 volt or 400 volt output
3 phase in either 60Hz or 50Hz 
Nema1 Enclosure

        MODEL MODEL
KVA AMPS @ 208V AMPS @ 380V AMPS @ 400V 60HZ 50HZ
3 8.3 4.6 4.3 MT3H6-20 MT3H6-20-EUR
 6 16.6  9.2   8.7 MT6H6-20   MT6H6-20-EUR
 10  28.0  15.2  14.5  MT10H6-20  MT10H6-20-EUR
 15  41.6  22.8  21.7  MT15H6-20  MT15H6-20-EUR
 30  83.3  45.6  43.4  MT30H6-20  MT30H6-20-EUR
 45  125.0  68.5  65.0  MT45H6-20  MT45H6-20-EUR
 50  139.0  76.0  72.3  MT50H6-2
 
 MT50H6-20-EUR
 75  208.0  114.0  108.4 MT75H6-20   MT75H6-20-EUR
 112.5  312.0  171.1  162.6  MT112.5H6-20  MT112.5H6-20-EUR
 150  416.0  228.2  216.8  MT150H6-20  MT150H6-20-EUR


240 Volt Euro Export-Ready Transformers
240 volt input and 380 volt or 400 volt output
3 Phase in Either 60Hz or 50Hz
Nema1 Enclosure

        MODEL MODEL
KVA AMPS @ 240V AMPS @ 380V AMPS @ 400V 60HZ 50HZ
3 7.2 4.6 4.3 MT3G6-20 MT3G6-20-EUR
6 14.4 9.2 8.7 MT6G6-20 MT6G6-20-EUR
10 24.0 15.2 14.5 MT10G6-20 MT10G6-20-EUR
15 36.1 22.8 21.7 MT15G15-20 MT15G6-20-EUR
30 72.3 45.6 43.4 MT30G6-20 MT30G6-20-EUR
45 108.0 68.5 65.0 MT45G6-20 MT45G6-20-EUR
50 120.4 76.0 72.3 MT50G6-20 MT50G6-20-EUR
75 181.0 114.0 108.4 MT75G6-20 MT75G6-20-EUR
112.5 272.0 171.1 162.6 MT112.5G6-20 MT112.5G6-20-EUR
150 360.0 228.2 216.8 MT150G6-20 MT150G6-20-EUR


480 volt Euro Export-Ready Transformers
480 volt input and 380 volt or 400 volt output
3 phase in either 60Hz or 50Hz
Nema1 Enclosed

        MODEL MODEL
KVA AMPS @ 480V AMPS @ 380V AMPS @ 400V 60HZ 50HZ
3 3.6 4.6 4.3 MT3B6-20 MT3B6-20-EUR
6 7.2 9.2 8.7 MT6B6-20 MT6B6-20-EUR
10 12.0 15.2 14.5 MT10B6-20 MT10B6-20-EUR
15 18.1 22.8 21.7 MT15B6-20 MT15B6-20-EUR
30 36.1 45.6 43.4 MT30B6-20 MT30B6-20-EUR
45 54.0 68.5 65.0 MT45B6-20 MT45B6-20-EUR
50 60.2 76.0 72.3 MT50B6-20 MT50B6-20-EUR
75 90.5 114.0 108.4 MT75B6-20 MT75B6-20-EUR
112.5 136.0 171.1 162.6 MT112.5B6-20 MT112.5B6-20-EUR
150 180.0 228.2 216.8 MT150B6-20 MT150B6-20-EUR


600 volt or 575 volt Euro Export-Ready Transformer
600 volt or 575 volt input and 380 volt or 400 volt output
3 phase in either 60Hz or 50Hz
Nema1 Enclosed


           MODEL  MODEL
KVA AMPS @ 600V AMPS @ 575V AMPS @ 380V AMPS @ 400V 60HZ 50HZ
3 2.9 3.1 4.6 4.3 MT3AO6-20 MT3AO6-20-EUR
6 5.8 6.0 9.2 8.7 MT6AO6-20 MT6AO6-20-EUR
10 9.6 10.1 15.2 14.5 MT10AO6-20 MT10AO6-20-EUR
15 14.4 15.1 22.8 21.7 MT15AO6-20 MT15AO6-20-EUR
30 28.9 30.2 45.6 43.4 MT30AO6-20 MT30AO6-20-EUR
45 43.2 45.2 68.5 65.0 MT45AO6-20 MT45AO6-20-EUR
50 48.2 50.3 76.0 72.3 MT50AO6-20 MT50AO6-20-EUR
75 72.1 75.4 114.0 108.4 MT75AO6-20 MT75AO6-20-EUR
112.5 108.0 113.1 171.1 162.6 MT112.5AO6-20 MT112.5AO6-20-EUR
150 144.0 150.8 228.2 216.8 MT150AO6-20 MT150AO6-20-EUR


208 volt, 240 volt, 480 volt Euro Export-Ready Transformer
208v, 240v, 480v input and 380v or 400 volt outputs
3 phase in either 60Hz or 50Hz
Nema1 Enclosure


            MODEL MODEL
KVA AMPS @ 208V AMPS @ 240V AMPS @480V AMPS @380V AMPS @400V 60HZ 50HZ
 3 8.3  7.2  3.6  4.6  4.3   MT3HGB6-20  MT3HGB6-20-EUR
 6  16.6  14.4  7.2  9.2  8.7   MT6HGB6-20  MT6HGB6-20-EUR
 10  28.0  24.0  12.0  15.2  14.5   MT10HGB6-20  MT10HGB6-20-EUR
 15  41.6  36.1  18.1  22.8  21.7   MT15HGB6-20  MT15HGB6-20-EUR
 30  83.3  72.3  36.1  45.6  43.6   MT30HGB6-20  MT30HGB6-20-EUR
 45  125.0  108.0  54.0  68.5  65.0   MT45HGB6-20  MT45HGB6-20-EUR
 50  139.0  120.4  60.2  76.0  72.3   MT50HGB6-20  MT50HGB6-20-EUR
 75  208.0  181.0  90.5  114.0  108.4   MT75HGB6-20  MT75HGB6-20-EUR
 112.5  312.0  272.0  136.0  171.1  162.6   MT112.5HGB6-20  MT112.5HGB6-20-EUR
 150  416.0  360.0  180.0  228.2  216.8   MT150HGB6-20  MT150HGB6-20-EUR

Marcus Supreme MHE - Marcus Supreme High Efficiency
Marcus Supreme
Marcus Supreme generates a minimum of 33% less losses than the regulated standards (CSA C802.2 and NEMA TP-1) mandate and meets the most severe efficiency levels of the recommended DOE CSL-3. This translates into significant dollar savings for both rrtrofit and new installations.

Retrofits:

The replacement of an older, non-compliant transformer with a Marcus SupremeTM will result in savings in the total life cycle of the installations.

Example: Replacing a 45KVA loaded at 50% will result in a savings of $618 a year and of $18,450.00 over a 30 year period (based on $0.10 a KWH)

New Installations:

Choosing a Marcus SupremeTM over a new compliant transformer is the right decision.

Example: A 225KVA transformer Marcus MHE225A2 Supreme loaded at 75% will save $1557 a year and $46,710 over the 30 year life cycle of the transformer.
 



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