CE Compliant certified

CE Compliant

High-Reliability Generator Excitation Rheostats for Industrial Power

High-reliability generator excitation rheostats and motorized potentiometers engineered for precise control in industrial power generation and automation systems. Featuring wirewound and conductive plastic elements, slip clutch protection, and AC/DC motor options with power ratings from 0.5W to 100W. Designed for long-term reliability with life expectancies up to 50 million turns in demanding applications including power plants, oil rigs, and control systems.

100 watt with 115 VAC motor
10 turn wirewound - 2 Watt - 100 ohm to 100K - 1 1/4″Dia x 4 3/4″ L
50 watt with 115 VAC motor
Motorized Rheostats
Single turn conductive plastic - 2 Watt - 500 ohm to 100K - 2″ square x 4 1/4″ L
Single turn wirewound - 0.5 Watt - 10 ohm to 20K - 1.5″ x 5″ L
50 watt with DC motor
AC Motorized Potentiometers
10 turn wirewound - 2 Watt - 100 ohm to 100K - *
10 turn wirewound - 2 Watt - 100 ohm to 100K - 1.5″ x 5″ L
10 turn wirewound - 2 Watt - 100 ohm to 100K - 1.5″ x 6 3/4″ L
Single turn wirewound - 0.5 Watt - 10 ohm to 20K - 1 3/8″ Dia x 3.76″L Dual 4.25″L
10 turn wirewound - 5 Watt - 10 ohm to 100K - 2″ square x 8.5″ L
10 turn wirewound - 2 Watt - 5K/5K/5K normal. Others available. - 1 1/4″Dia x 7″ L
Single turn conductive plastic - 1 Watt - 500 ohm to 20K Standard - 1.5″ x 5″ L
10 turn wirewound - 2 Watt - 1K/1K, 2K/2K, 3K/3K, 5K/5K, 5K/10K, 10K/10K - 1.5″ x 6″ L
Single turn wirewound - 0.5 Watt - 10 ohm to 20K - 2″ x 5.25″ L
Single turn conductive plastic - 1 Watt - 500 ohm to 20K Standard - 1.5″ x 4 3/4″ L
10 turn wirewound - 2 Watt - 100 ohm to 100K - 1 3/8″Dia x 4″ L
Single turn wirewound - 0.5 Watt - 1K/1K, 2K/2K, 3K/3K, 5K/5K, 5K/10K, 10K/10K - 1.5″ x 5.25″ L
DC Motorized Potentiometer
10 turn wirewound - 2 Watt - 100 ohm to 100K - 1.5″ x 6 1/2″ L
10 turn wirewound - 2 Watt - 100 ohm to 100K - 7/8″ Dia x 4 3/4″ L
10 turn wirewound - 2 Watt - 100 ohm to 100K - 1.5″ x 5 1/4″ L
Single turn Conductive plastic - 1 Watt - 50 ohm to 20K Standard - 1 3/8″ Dia x 3.76″L 5.5″L
10 turn wirewound - 2 Watt - 1K/1K, 2K/2K, 5K/5K, 10K/10K, 2K/3K, 5K/10K - 1 1/4″Dia x 5 3/4″ L
10 turn wirewound - 5 Watt - 100 ohm to 100K Normal 1K - 2″ Square x 6 3/4″ L
25 watt with 115 VAC motor
25 watt with DC motor
Single turn Conductive plastic - 1 Watt - 500 ohm to 100K - 1 1/4″Dia X 5.4″L
10 turn wirewound - 2 Watt - 100 ohm to 100K - 1 1/4″Dia x 6″ L
Single turn conductive plastic - 2 Watt - 1K to 100K - 2″ square x 4″ L
3 turn hybrid - 1 Watt - 1K to 100K - 7/8″Dia x 4 3/4″ L

Our Range of Products
100 watt with 115 VAC motor

100 watt with 115 VAC motor

  • 100W high-power capacity
  • Slip clutch protection
  • CE compliant certified
10 turn wirewound - 2 Watt - 100 ohm to 100K - 1 1/4″Dia x 4 3/4″ L

10 turn wirewound - 2 Watt - 100 ohm to 100K - 1 1/4″Dia x 4 3/4″ L

  • 2 million turn lifespan
  • 10-turn wirewound
  • Rugged open-frame cage
50 watt with 115 VAC motor

50 watt with 115 VAC motor

  • 50W wirewound element
  • Panel mount design
  • 1-10 RPM AC motor
Motorized Rheostats

Motorized Rheostats

  • 25W-100W power options
  • AC/DC motor choices
  • Compact efficient package
Single turn conductive plastic - 2 Watt - 500 ohm to 100K - 2″ square x 4 1/4″ L

Single turn conductive plastic - 2 Watt - 500 ohm to 100K - 2″ square x 4 1/4″ L

  • 50 million turn lifespan
  • Conductive plastic element
  • Circuit board mounted
Single turn wirewound - 0.5 Watt - 10 ohm to 20K - 1.5″ x 5″ L

Single turn wirewound - 0.5 Watt - 10 ohm to 20K - 1.5″ x 5″ L

  • 1 million turn life
  • 115 VAC reversible motor
  • Starting capacitor included

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Frequently Asked Questions

What power ratings are available for generator excitation rheostats?

Our motorized rheostats range from 0.5W to 100W, with common options including 25W, 50W, and 100W units for various excitation control requirements.

How long do motorized potentiometers typically last in power generation applications?

Can these rheostats operate with both AC and DC motor systems?

What protection features prevent damage to the potentiometer?

Are these products certified for international power generation installations?

What is the typical RPM range for motorized rheostats?

How are these products serviced or repaired?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Power Generation

Power Generation

Generator excitation control systems requiring precise resistance adjustment for voltage regulation and field current management.

Industrial Automation

Industrial Automation

Process control applications demanding reliable proportional control of analog devices with precision variable resistance settings.

Oil & Gas

Oil & Gas

Oil rig and asphalt plant applications requiring rugged motorized potentiometers for remote control of critical equipment in harsh environments.

Aerospace & Defense

Aerospace & Defense

Aircraft, helicopter, and simulator applications utilizing precision motorized potentiometers for flight control systems and instrumentation.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

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Why Power Generation Industries Choose On Line Controls, Inc.

Proven Long-Term Reliability

Motorized rheostats and potentiometers engineered for 1-50 million turns, delivering decades of dependable service in demanding power generation and industrial automation environments.

Precision Control Technology

High-resolution wirewound and conductive plastic elements with slip clutch protection ensure accurate, hysteresis-free operation for critical excitation control applications.

Expert Manufacturing Excellence

Over 44 years of specialized experience designing and building precision control components in the USA, backed by 3-year warranty and unlimited technical support.

Request a Quote for Industrial Excitation Rheostats

Get expert guidance on selecting the right motorized rheostat or potentiometer for your application. Our technical team will respond promptly with specifications and pricing.

Contact Us Today

For immediate assistance, feel free to give us a direct call at 978-562-5353. You can also send us a quick email at olc@onlinecontrols.com