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High Power Rheostats

Rotary Variable Power Wire Wound Resistors

Heavy Duty Rheostat Load Boxes ( both Rotary and Sliding type )

FVR, FVRB, DSR-W, and DSR-WB series


  • High Power Rheostat Applications : Resistive Load simulations, Current Regulators, Voltage Dividers, Motor speed controls, Burn-in test loading and other general applications
    The main function of a rheostat is to adjust the circuit current between the maximum current at the minimum resistance value, and the minimum current at the rated resistance.

  • Rheostat resistance value:
    Power Rheostat doesn’t have standard resistance values. Customers determine the lower and upper resistance values according to their current ranges, though there might have limitations because of resistance material availability.
    Two rheostats with the same power rating doesn’t mean they have the same maximum load current capacity.

  • High Power Rheostats : FVR

  • rated Power and rated resistance : 25W 50W 100W 300W and 500W

  • Rotary Rheostat Boxes / Heavy Duty Rheostat Boxes : FVRB :

  • Standard power range from 300W ~ 5kW

  • For some applications, power range can be up to 20kW

  • Options : Voltmeter, Ammeter, Thermal protection, Over-Current protection, Control Main Switch, Cooling System
     

  • Slide Rheostat with Handwheel : DSR-W :

  • Also known as High Power Variable Resistor
    Support power up to 20kW
    This series is based on the DDR-F/DSR-F series power resistor with a Handwheel to adjust the resistance value.
     

  • Adjustable Power Load Bank : 1-Phase DSR-WB / 3-Phase DSR3-WB

  • High Power Slide type Rheostat

  • This is based on DSR-W series Power Wire Wound Resistor.

  • Standard power range for 1-Phase : 1kW - 50kW

  • Standard power range for 3-Pjhase : 3kW - 54kW

  • Options : Voltmeter, Ammeter, Wattmeter, Ohm meter, Thermal and Over Current protection, Cooling System and Control Main Switch

  • Please tell the following for all the above rheostats.
    i) maximum Resistance when at the minimum Current
    ii) minimum Resistance when at the maximum Current
    iii) Voltage at minimum and maximum resistance

  • Different load current and resistance ranges combinations need different resistance material to withstand the current and achieve the resistance value.

  • There is no standard rated resistance or resistance material that suitable for all applications even with the same rated power.

  • Rheostat rated Power = (Rheostat maximum load Current)2 x rated Resistance

  • In terms of Rated Power, a smaller Rated Resistance value means the rheostat can have larger Rated maximum Current capacity.

  • Please tell the best suitable resistance ranges that suitable for your application. All rheostats are made according to customer's application need.

  • There are more Note and Tips for application limitation and parameters determination at the application page.

  • Support High Load Current requirement

  • There are more Rheostats photos and Rheostat Boxes photos.

  • Rheostat Bank FVRB / Adjustable Load Bank DSR-WB options :

  • Ammeter, Voltmeter and Wattmeter

  • OverCurrent protection

  • Thermal protection

  • Cooling Fans system.

  • Prompt Delivery and e-mail us for pricing.

  • Support small quantity order and accept PayPal

FVR Rheostats : up to 500W

Power Watt Tolerance +/- % Dimensions in mm +/-3mm
D B L L1 d G
25W 5 <44 <50 <60 <25 6 2
50W <64 <70 <64
100W <84 <93 <66 <35 4
150W 10 <104 <120 <73 <35
300W <156 <170 <115 <55 10
500W <206 <215 <122 <65

Resistances and load current are made according to customer's application need.

Rheostat sizes might vary depending on resistances and load current.

 

Tandem mounted Rheostats : up to 3kW

Part Number Power Watt rated Resistance range ohm max. Temperature Dimensions in mm
min./OFF max. A D C B
FVR-500W/2 1000 0 5000 350C <215 <195 <218 <200
FVR-500W/3 1500 0 5000 <215 <195 <218 <300
FVR-500W/4 2000 0 5000 <215 <195 <218 <400
FVR-500W/5 2500 0 5000 <215 <195 <218 <500
FVR-500W/6 3000 0 5000 <215 <195 <218 <600

Resistance and load current are made according to customer's application need.

Rheostat sizes might vary depending on resistances and load current.

Rheostat Load Boxes : FVRB series : Power can be up to 20kW, depends on the resistance value and application.

Resistance and load current is made according to customer's application need.

  W in mm D in mm H in mm
300W 220 240 150
500W 260 280 150
1000W 260 280 280
1500W 260 280 320
2000W 260 280 450
2500W 260 280 530
3000W 260 280 610
3500W 260 280 690
4000W 260 360 800

Load Box sizes might vary depending on resistances, load current or other protective functions.

Power Slide Rheostat Load Banks : DSR-WB series :

Power can be up to 50kW, depends on the resistance value and application

- Support High Current up to 50A.

- Resistances and load current are made according to customer's application need.

- Options : Main Control Switch, Over Current protection, Thermal protection, Meters.

Rated Power Max. Width mm Max. Depth mm Max. Height mm
1kW 430 210 320
2kW 610 210 320
3kW 710 210 320
4kW 530 260 370
5kW 610 310 370
6kW 710 310 370
10kW 780 410 370

Load Bank sizes might vary depending on resistance, load current or other protective functions.

3-Phase Power Slide Rheostats Load Banks : DSR3-WB series :   

  

Existing is Three Phase asynchronous design.

If necessary we can support Synchronous requirement.

For some cases, can support Power up to 54kW and load Current up to 50A.

Please tell following parameters.

i) maximum Resistance when at the minimum Phase Current
ii) minimum Resistance when at the maximum Phase Current

iii) voltage (L-N or L-L) at minimum and maximum phase resistance

Resistances and load current are made according to customer's application need.

- Options : Main Control Switch, Over Current protection, Thermal protection, Voltmeter, Ammeter, Power meter and Ohmmeter.

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