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
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.
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.