MARATHON MOTORS Hazardous Duty Division 1 Explosion Proof Motors, Severe Duty, Three Phase, C Face Footless
Marathon hazardous duty, Division 1 explosion-proof motors operate in environments that are exposed to potentially explosive or flammable atmospheric vapours, fumes, dust or gases. They are used in Class 1 (Group C & D) & Class 2 (Group F & G) locations.
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Bearings: Ball , Duty: Continuous , Efficiency Group: NEMA Premium Efficient , Max. Ambient Temp.: 40 Degrees C , Motor Application: Hazardous Location , Motor Design: 3-Phase , Motor Enclosure Design: Totally Enclosed Fan-Cooled , Motor Shaft Design: Keyed , Phase: 3 , Temp. Code: T3B
Style | Model | Lead Length | Frame | Frame Material | Length Less Shaft | Motor Thermal Protection | Nameplate RPM | NEMA Design | Nominal Efficiency | Price | |
---|---|---|---|---|---|---|---|---|---|---|---|
A | 182TTGN16003 | 6" | 182TC | Cast Iron | 16" | T-stat | 3525 | B | 89.5% | €2,073.30 | |
B | 213TTGND16001 | 6" | 213TC | Cast Iron | 20 5/16" | T-stat | 3525 | B | 91.7% | €3,048.14 | |
A | 143TTGN16539 | 12" | 143TC | Cast Iron | 13 1/16" | T-stat | 1765 | B | 82.5% | €1,381.73 | |
A | 145TTGN16036 | 12" | 143TC | Cast Iron | 13 1/16" | T-stat | 1755 | B | 50.5% | €1,545.55 | |
C | 056T17G15601 | 18" | 56C | Rolled Steel | 14 1/16" | Auto | 1725 | B | 87.5% | €1,605.49 | |
C | 056T17G15599 | 18" | 56C | Rolled Steel | 14 1/16" | Auto | 1725 | A | 86.5% | €1,076.63 | |
C | 056T17G15615 | 18" | 56C | Rolled Steel | 14 1/16" | Auto | 1725 | B | 85.5% | €1,117.06 |
Working Mechanism
- Electric motors convert electrical energy into mechanical energy for generating motion.
- Force is produced within the motor through the interaction between a winding alternating (AC) or direct (DC) current and the magnetic field.
Features
- Marathon hazardous duty motors are supplied in explosion-proof conduit boxes for efficient operation in harsh environments.
- They feature cast iron or rolled steel frame construction for structural rigidness and corrosion-proof service, at temperatures up to 40 degrees Celsius.
- These Class B insulated units eliminate the need for run capacitors, starting capacitors and centrifugal starting switches, to prevent failure or wear of motors.
- They come with T-stat or auto thermostats that are connected to the control circuit.
- These triple-phase models have clockwise or counterclockwise rotational shafts and deliver speeds up to 3525 rpm.
- They are equipped with a TEFC enclosure to permit cooling air to flow through the motor, thus preventing overheating.
- These C-face, footless mounting units have ball bearings to reduce motor friction.
Standards and Approvals
- UL
- NEMA
Frequently Asked Questions
What does class B insulation mean?
These motors have Class B insulation for temperature control. Class B insulated motors can handle temperatures up to 130 degrees C.
Do these motors prevent overloading?
Yes, Marathon motors have a T-stat or automatic reset thermal protector to prevent overloads.
What is the difference between single, double and triple-phase motors?
- Single-phase motor: Electricity flows through a single conductor.
- Double-phase motor: Electricity flows through 4-wire conductors (2 for each phase).
- Triple-phase motor: Electricity flows through 3 separate conductors.
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