High Power Rheostat

High Power Rheostat Applications:
Adjustable resistive loads, Current Regulators, Voltage Dividers, 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.

Rotary Rheostat : FVR:
Power range : 25W, 50W, 100W, 300W, and 500W

Tandem mounted Rheostat : FVR:
Power range : 1000W, 1500W, 2000W, 2500W, 3000W and 4000W

Rotary Rheostat Load Box : FVRB:
It consists of FVR Rotary Rheostats.
Power range : 300W ~ 5kW (depends on the resistances and load current rating)
Options : Voltmeter, Ammeter, Ohm meter, Thermal protection, Over-Current protection, Control Main Switch, Cooling system.

Sliding 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 power resistor with a Handwheel to adjust the resistance value.

Sliding Rheostat Load Bank / Sliding type Adjustable Load Bank: DSR-WB:
Single Phase
This series is based on the DSR-W slide rheostat with a protective enclosure.
Standard power range: 5kW – 50kW.
Options : Voltmeter, Ammeter, Ohm meter, Thermal Protection, Over-Current protection, Control Main Switch, Cooling system.

3-Phase Sliding Rheostat Load Bank / 3-Phase Slide type Adjustable Load Bank: DSR3-WB:
This is made with three DSR-W series slide rheostats.
Standard power range: 3kW – 54kW
Features with Voltmeter, Ammeter, Wattmeter, Ohm meter; Thermal, Over Voltage and Current Protection, Cooling System and Control Main Switch

Please state 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 the minimum and maximum resistance
All power rheostats are made according to the end customer’s application needs.

There are application limitations and parameter determination notes on the application page.
MFPR supports High Power Rheostats with different adjustable resistance ranges, load currents and protection designs.
Please feel free to send your application details for a resistor suggestion and quotation.
Accept small, bulk quantity orders and PayPal.

FVR Rheostat : 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

Resistance and load current are made according to customer’s application needs. Rheostat sizes might vary depending on the resistances, load current ratings and other factors.

Tandem mounted Rheostat : up to 4kW (depends on the resistances and maximum load current ratings)

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 needs. Rheostat sizes might vary depending on the resistances, load current ratings and other factors.

Rheostat Load Box : FVRB series:
Power can be up to 20kW, depending on the resistance values and applications. Resistance and load current are 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

Rheostat bank sizes might vary depending on the resistances, load current ratings and other factors.

Power Sliding Rheostat Load Bank : DSR-WB series:
Power can be up to 50kW, depending on the resistance values and load current ratings.
Support current up to 50A.
Resistances and load current are made according to customer’s application needs.
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

Rheostat bank sizes might vary depending on the resistances, load current ratings and other factors.

3-Phase Power Sliding Rheostats Load Bank: DSR3-WB series:

Three-Phase – asynchronous design. If necessary, we can support Synchronous design.
We can support Power up to 54kW and load Current up to 50A (case by case).
Please state the 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 the 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.

Please feel free to send your application details for a suggestion and quotation.
Other similar power resistors.