transformers for outdoor and hazardous locations … · description: selecting the right...

For Over 70 Years

TRANSFORMERS for

OUTDOOR and HA Z ARDOUS LOCAT IONS

DESCRIPTION:

SELECTING THE RIGHT TRANSFORMER FOR YOUR APPLICATIONTransformers for Outdoor and Hazardous LocationsMost dry type transformers are installed indoors in dry, clean locations where general purpose enclosures are sufficient protection. For outdoor applications or for installations in areas with dirty, dusty, harsh, classified areas or corrosive environments care must be taken to choose the proper transformer type for the particular location.

Marcus offers four distinct models which withstand from the mildest to the harshest conditions:

TYPE 3R Indoor/Outdoor Ventilated

TYPE SCR Outdoor Ventilated Enhanced

MODEL CD Outdoor Ventilated 3R (Class 1, Division 2)

TYPE RET Outdoor Epoxy Encapsulated (Class 1, Division 2)

TYPE 3R: Indoor/Outdoor VentilatedProvides protection against rain & falling sleet or applications as well as indoor locations where dripping water is a concern.

• Typical Applications: Tunnels, mines or sheltered outdoor locations.

TYPE SCR: Outdoor Ventilated EnhancedEnclosure with 3R hoods as well as weather-buffer screens provide an extra degree of protection against blowing rain or snow without restricting normal cooling air flow.

• Typical Applications: Roof top installation with air conditioning units

MODEL CD: Outdoor Ventilated 3R (Class 1, Division 2)Ventilated transformers with 3R hoods suitable for locations with hazardous atmospheres

• Typical Applications: Mining, petrochemical and pulp & paper installations

TYPE RET: Outdoor Epoxy Encapsulated (Class 1, Division 2)

Epoxy-encapsulated, non-ventilated transformers completely seals element from the environment. No moisture or containments affects winding. The heat dissipation is through the enclosure radiation only.

• Typical Applications: Petrochemical plants, steel mill, mines and food industry.

Conditions to Consider

Moisture & Humidity

• Dripping and falling Water• Water spraying from different

angles• Wind blown rain and snow • Falling ice

Industrial Ecosystem

• Dust or wood fibers are present• Poor air quality• Flammable gases or vapors• Concentration of Flammable

materials may exist

B

A

C

Ventilation Openings

TYPE 3R: INDOOR/OUTDOOR VENTILATED

The Marcus Type-3R ventilated (MTWP) 3 phase transformer provides a degree of protection for indoor/outdoor applications. Exterior applications where foreign debris such as snow, ice or rain are a concern.

FEATURES:Ratings 3KVA - 450KVA

Enclosure Type NEMA3R Ventilated

Description Protection against rain, sleet, snow, ingress of foreign objects, falling dirt and external formation of ice.

Insulation Class 220°C

Temperature Rise 150°C

Temperature Code for Class 1 Division 2 N/A

Construction Features ANN ventilated Enclosure

Applications Outdoor Use: Tunnels Mines, Pumping stations where dripping and splashing water is a problem.

Dimensions: 3 Phase, 60HZ KVA Catalogue # Catalogue # A B C Weight (600V) (480V) in (mm) in (mm) in (mm) Lbs. (kg)

6 MTWP6A1 MTWP6B1 21 (533) 13.1 (333) 18.5 (470) 80 (36)

10 MTWP10A1 MTWP10B1 21 (533) 13.1 (333) 18.5 (470) 140 (64)

15 MTWP15A1 MTWP15B1 21 (533) 13.1 (333) 18.5 (470) 188 (86)

30 MTWP30A1 MTWP30B1 22.5 (572) 18.3 (465) 21 (533) 275 (126)

45 MTWP45A1 MTWP45B1 27 (686) 20.3 (516) 25.5 (648) 410 (187)

75 MTWP75A1 MTWP75B1 36.2 (921) 25.6 (650) 30.3 (770) 600 (274)

112.5 MTWP112.5A1 MTWP112.5B1 36.2 (921) 25.6 (650) 30.3 (770) 1000 (457)

150 MTWP150A1 MTWP150B1 46.7 (1188) 28.3 (719) 35 (890) 1250 (480)

225 MTWP225A1 MTWP225B1 46.7 (1188) 28.3 (719) 35 (890) 1750 (800)

300 MTWP300A1 MTWP300B1 52 (1320) 30.8 (783) 36.5 (927) 2400 (1097)

450 MTWP450A1 MTWP450B1 52 (1320) 30.8 (783) 36.5 (927) 2900 (1325)

See General Catalogue for Type-3R, single phase (MSWP)

TYPE-SCR : OUTDOOR VENTILATED ENHANCED

The Marcus 3R (MTWP-SCR) transformer is rated for installations on rooftop applications. Our weather buffer screens provide protection from wind, snow, rain and airborne debris without affecting normal cooling airflow. The benefit of using a 3R-SCR ventilated transformer over the Nema 4 epoxy style transformer include lower cost, reduced weight and easier installation.


Enclosure Type NEMA3R Enhanced Ventilated

Classification Weather buffer screens: Extra protection against blowing rain or snow without restricting normal cooling air flow.



Temperature Code for Class 1 Division 2 N/A


Applications Enhanced Outdoor Use Rooftop installations with air conditioning units, Chillers

B

A

C



30 MTWP30A1-SCR MTWP30B1-SCR 22.5 (572) 18.3 (465) 21 (533) 275 (126)

45 MTWP45A1-SCR MTWP45B1-SCR 27 (686) 20.3 (516) 25.5 (647) 410 (187)

75 MTWP75A1-SCR MTWP75B1-SCR 36.2 (921) 25.6 (650) 30.3 (772) 600 (274)

112.5 MTWP112.5A1-SCR MTWP112.5B1-SCR 36.2 (920) 25.6 (650) 30.3 (772) 1000 (457)



MESH DOOR

MODEL-CD : OUTDOOR VENTILATED 3R (CLASS 1 DIVISION 2)The Marcus model-CD (MTWPCD) transformer is for use in applications where Class 1 Division 2 is required. The benefits of the model-CD over the epoxy encapsulated transformer is in its lighter weight and lower cost.


Enclosure Type NEMA3R Ventilated

Description Ventilated outdoor transformer. Suitable for locations with hazardous atmosphere.



Temperature Code for Class 1 Division 2 T3C

Approved Groups A, B, C & D


Applications Outdoor Hazardous Locations: Mines, Oil Extraction Environment, Petrochemical, Pulp & paper

B

A

C



15 MTWPCD15A1 MTWPCD15B1 22.5 (572) 18.3 (465) 21 (533) 188 (86)

30 MTWPCD30A1 MTWPCD30B1 27 (686) 20.3 (516) 25.5 (648) 275 (126)

45 MTWPCD45A1 MTWPCD45B1 27 (686) 20.3 (516) 25.5 (648) 410 (187)

75 MTWPCD75A1 MTWPCD75B1 36.2 (921) 25.6 (650) 30.3 (772) 600 (274)

112.5 MTWPCD112.5A1 MTWPCD112.5B1 36.2 (921) 25.6 (650) 30.3 (772) 1000 (457)

150 MTWPCD150A1 MTWPCD150B1 46.7 (1188) 28.3 (719) 35 (889) 1250 (480)

CLASS 1 DIVISION 2Canadian Standards and Electric Code

GROUP CLASSIFICATION CONDITION OF OPERATION

GROUP A Atmospheres containing acetylene

GROUP B Atmospheres containing butadiene, ethylene oxide, hydrogen, (or gases equivalent to hydrogen), propylene oxide

GROUP C Atmospheres containing acetaldehyde, cyclopropane, diethyl ether, ethylene, hydrogen sulfide, or unsymmetrical dimethyle hydrazine (or other of equivalent hazard

GROUP D Atmosphere containing acetone, acrylonitrile, alcohol, ammonia, benzene, benzol, butane, ethylene, gasoline, hexane, isoprene, natural gas, propane, propylene, vinyl acetate, xylenes, or other vapours or gases of equivalent hazard

TYPE-RET: OUTDOOR EPOXY ENCAPSULATED (CLASS 1 DIVISION 2)For installations in hazardous locations for maximum protection against the environment. The Nema 4 enclsoure is non-ventilated which prevents exposure of the element to the atmosphere.


Enclosure Type NEMA4 (4X Available), Non-Ventilated

Description Non Ventilated outdoor transformer seals element from exterior contaminants.



Temperature Code for Class 1 Division 2 T3C

Approved Groups A, B, C & D

Construction Features Epoxy encapsulated (Regular paint or stainless steel enclosure available)

Applications Outdoor Hazardous Locations (Petrochemical Plants, Steel Mills, Mines, Oil Extraction Environment, Food Industry


6 RET6A1 RET6B1 21.5 (546) 15.7 (400) 12.3 (315) 175 (80)

10 RET10A1 RET10A1 21.5 (546) 15.7 (400) 12.3 (315) 225 (102)

15 RET15A1 RET15A1 21.5 (546) 15.7 (400) 12.3 (315) 298 (136)

30 RET30A1 RET30A1 24.87 (631) 13.8 (352) 28.7 (730) 600 (273)

45 RET45A1 RET45A1 24.8 (631) 13.8 (352) 28.7 (730) 700 (318)

75 RET75A1 RET75A1 32.8 (835) 18.3 (466) 34.3 (873) 1410 (640)

112.5 RET112.5A1 RET112.5A1 44 (1118) 23.7 (603) 39 (990) 1380 (830)

150 RET150A1 RET150A1 44 (1118) 23.7 (603) 39 (990) 2500 (1143)

See General Catalogue for Type-RES, single phase

CLASS 1 DIVISION 2Canadian Standards and Electric Code

GROUP CLASSIFICATION CONDITION OF OPERATION

GROUP A Atmospheres containing acetylene

GROUP B Atmospheres containing butadiene, ethylene oxide, hydrogen, (or gases equivalent to hydrogen), propylene oxide

GROUP C Atmospheres containing acetaldehyde, cyclopropane, diethyl ether, ethylene, hydrogen sulfide, or unsymmetrical dimethyle hydrazine (or other of equivalent hazard

GROUP D Atmosphere containing acetone, acrylonitrile, alcohol, ammonia, benzene, benzol, butane, ethylene, gasoline, hexane, isoprene, natural gas, propane, propylene, vinyl acetate, xylenes, or other vapours or gases of equivalent hazard

transformers for outdoor and hazardous locations … · description: selecting the right...

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