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  2. Utilization categories - Wikipedia

    en.wikipedia.org/wiki/Utilization_categories

    Connecting and disconnecting under no-load conditions: 60947-5-1 DC-21: Switching of resistive loads, including moderate overloads: 60947-5-1 DC-22: Switching of mixed resistive and inductive loads, including moderate overloads (i.e. shunt motors) 60947-5-1 DC-23: Switching of highly inductive loads (i.e. series motors) 60947-5-1

  3. NEMA size - Wikipedia

    en.wikipedia.org/wiki/NEMA_size

    NEMA (National Electrical Manufacturers Association) contactors and motor starters are rated by sizes. These sizes are grouped by rated current and power. [1] [2]

  4. Load factor (electrical) - Wikipedia

    en.wikipedia.org/wiki/Load_factor_(electrical)

    In electrical engineering the load factor is defined as the average load divided by the peak load in a specified time period. [1] It is a measure of the utilization rate, or efficiency of electrical energy usage; a high load factor indicates that load is using the electric system more efficiently, whereas consumers or generators that underutilize the electric distribution will have a low load ...

  5. Electric motor - Wikipedia

    en.wikipedia.org/wiki/Electric_motor

    An industrial electric motor . An electric motor is a machine that converts electrical energy into mechanical energy.Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor's shaft.

  6. Power-to-weight ratio - Wikipedia

    en.wikipedia.org/wiki/Power-to-weight_ratio

    Electric motor type Weight Peak power output Power-to-weight ratio Example use SI English SI English kW/kg hp/lb Kawak 4 kW 28 VDC brushless DC motor [26] 11.8 kg 26 lb 4 kW 5.4 hp 0.29 kW/kg 0.18 hp/lb Flight-rated motor for aircraft auxiliary systems (fuel pumps, etc.) Panasonic MSMA202S1G AC servo motor [27] 6.5 kg 14 lb 2 kW 2.7 hp

  7. Traction motor - Wikipedia

    en.wikipedia.org/wiki/Traction_motor

    This assumes that the electrical generator converts 90% of the engine's output into electrical energy and the traction motors convert 90% of this electrical energy back into mechanical energy. [citation needed] Calculation: 0.9 × 0.9 = 0.81 Individual traction motor ratings usually range up 1,600 kW (2,100 hp).

  8. Load profile - Wikipedia

    en.wikipedia.org/wiki/Load_Profile

    Graphs by hour of California's total electric load, the total load less solar and wind power (known as the duck curve) and solar power output. Data is for October 22, 2016, a day when the wind power output was low and steady throughout the day. In electrical engineering, a load profile is a graph of the variation in the electrical load versus ...

  9. Indian locomotive class WAG-9 - Wikipedia

    en.wikipedia.org/wiki/Indian_locomotive_class_WAG-9

    The first H stands for higher axle load and the second H stands for the higher power rating. The class has been allocated a block of serial numbers starting with 90001, the number of the first unit. The decision to upgrade the power output of the WAG-9 was taken to partly meet the demands of the upcoming electrified Western Dedicated Freight ...