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Power Resistor

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Resistor Designs

STAINLESS STEEL GRID RESISTORS CLASS 9857

• Reliable stainless steel resistor elements and terminals
• All units are triple insulated for 1000V AC or DC
• Standard grid resistors in stock to reduce costly downtime
• Stable resistance over wide temperature ranges
• High wattage saves space, weight and cost
• Standard 26.5” dimensions for quick replacement of other brands
• Custom grid resistors available

power resistor designs

Replacement Grid Resistors of all Major Name Brands. Approximate Dimensions for Standard Resistor Bank

Also available in 12", 18", 22" & 25.5" banks to meet your requirements. Consult factory for technical data.


Ordering Information Required

SPECIAL RESISTORS

• Resistance between terminals
• Continuous ampere rating required between terminals
• Terminal designations
• Size requirements

insulating washer resistor

Silicon Bonded Mica Insulating Washers

Gives a higher temperature rating than epoxy bonded.

end frame insulator

End Frame Insulator

Molded fiberglass material is used to insulate the connection between the support rods and the end frame. This allows for the grid structure to be held securely together and double insulated to ground.

power resistors

Support Rods

Threaded support rods are insulated with silicon bonded mica tubing to provide primary protection from grounding/shorting out.

power resistor

End Frames

Filnor endframes are designed so that the resistors can be easily mounted in racks or stacked.

power resistor designs

Stainless Steel Grid Element

Filnor grid elements are stamped out in our factory from stainless chromium alloy steel. Filnor standard lower capacity elements are welded together to allow for a continuous flow of current up to 165 amperes. Filnor standard high capacity grids are manufactured with one continuous ribbon or strip element between 180 and 525 amperes continuous.

Enclosure for Standard Grid Resistor

• Screened for indoor applications.
• Louvered for outdoor applications.
• Forged eyebolts for easy hoisting.
• Removable front and rear louvered covers allow easy access for connection and inspection.
• Corrosion resistant nameplate provides complete ratings and manufacturerís information.
• Heavy powder coat finish provides maximum protection.
• Options: stainless steel, aluminum, mill galvanized, hot dipped galvanized, custom paint finishes available.

HELICOIL WIREWOUND RESISTOR CLASS 9855

wirewound resistor

APPLICATIONS INCLUDING

• Dynamic Braking Resistors for AC or DC drives
• Neutral Grounding Resistors
• Starting and speed regulation uses
• Ballast resistors and heaters
• Load Banks

helicoil wirewound resistor

Helicoil Wirewound Resistor Specifications

The maximum power ratings specified are for resistors mounted in an open air atmosphere. If units are to be mounted closer together or in a restricted ventilation condition, the maximum power rating should be derated as follows. Resistors in a well ventilated enclosure should be rated at approximately 82% and in an unventilated enclosure at approximately 67% of their maximum power rating.

helicoil wirewound diagram
Choose ”Get a Quote” to receive a quote on our helicoil wirewound resistors or other resistor applications. Or see our Tech Center for more information on helicoil wirewound designs.

helicoil wirewound resister
Consult Filnor for assistance with your application.

SMOOTH WIREWOUND RESISTOR CLASS 9856

wirewound resistor

APPLICATIONS INCLUDING

• Dynamic Braking Resistor for AC or DC drives
• Neutral Grounding Resistors
• Starting and speed regulation uses
• Ballast resistors and heaters
• Load Banks

smooth wirewound resister

Smooth Wirewound Resistor Specifications

The maximum power ratings specified are for resistors mounted in an open air atmosphere. If units are to be mounted closer together or in a restricted ventilation condition, the maximum power rating should be derated as follows. Resistors in a well ventilated enclosure should be rated at approximately 82% and in an unventilated enclosure at approximately 67% of their maximum power rating.

grid resistor diagram
smooth wirewound resistor coil
smooth wirewound resistor

View Filnor's Standard Grid Resistors

STANDARD GRID RESISTORS

high current grid resistorThese stamped grid, chromium alloy stainless steel grid resistors range from 27 to 91 amps. Listed are our standard design banks, but various grids may be combined to design a resistor to fill an application at absolute minimum cost. The configuration is most commonly found in lower horsepower motor acceleration resistors and magnet controllers.

HEAVY DUTY GRID RESISTORS

high current strip resistorsThese stamped grid, chromium alloy stainless steel strip resistors range from 100 to 165 amps. The grids are welded together at their junctions which produces a continuous current carrying grid resistor. They are ideal for the medium and higher horsepower motor applications.

grid resister

HIGH CURRENT STRIP RESISTORS

These continuous stainless steel high current strip resistors range from 180 to 625 amps. The resistor element is formed by folding the stainless steel back and forth to produce a continuous, evenly spaced bank with heavy stainless steel terminals.


Optional Equipment & Services

• Complete stainless steel resistors (end frames, racks, and hardware).
• Interconnecting jumper installation at our factory.
• All connections wired to the bottom space of the rack using 200ºC rated wire or copper bus.
Enclosure for Standard Grid Resistor
• Screened for indoor applications
• Louvered for outdoor applications
• Forged eyebolts for easy hoisting
• Removable front and rear louvered covers allow easy access for connection and inspection
• Corrosion resistant nameplate provides complete ratings and manufacturer’s information
• Heavy powder coat finish provides maximum protection
• Options: stainless steel, aluminum, mill galvanized, hot dipped galvanized, custom paint finishes available.

Filnor Standard Grid Resistors
Part Number Continuous
Ampere Capacity
Resistance Ohms
@25∫ Total Bank
# Taps With
End Terminal
Quick
Quote
FH27 27 9.4 13
FH30 30 7.87 11
FH37 37 6.09 11
FH41 41 5.15 11
FH46 46 3.64 10
FH50 50 2.94 11
FH57 57 2.02 11
FH63 63 1.82 10
FH73 73 1.22 10
FH80 80 1.01 10
FH85 85 .850 9
FH91 91 .700 8
FT100 100 .608 10
FT110 110 .468 10
FT120 120 .421 10
FT135 135 .360 10
FT150 150 .267 8
FT165 165 .242 8
FHC180 180 .226 9
FHC200 200 .209 1
FHC225 225 .184 9
FHC260 260 .164 9
FHC300 300 .132 9
FHC350 350 .096 9
FHC400 400 .076 8
FHC450 450 .056 8
FHC525 525 .039 8

power resistor design

LS Covers

LS Covers are an economical solution for packaging your resistor requirements. They are available up to 4 resistor banks high. Consult factory for technical data.
Enclosures & Racks
Banks G" Screened H" Louvered
2 23 1/8 27 1/8
3 32 1/8 36 1/8
4 41 1/8 45 1/8
5 50 1/8 54 1/8
6 59 1/8 63 1/8
7 68 1/8 72 1/8
8 77 1/8 81 1/8
9 86 1/8 90 1/8

Box assemblies are available both
louvered or screened.
LS Cover A" B" C"
1 Resistor 26.5 25.25 7.75
2 Resistors 26.5 25.25 15.5
3 Resistors 26.5 25.25 23.25
4 Resistors 26.5 25.25 31

* Add 3/4” for covers



power resistor designs
power resistor enclosure


Filnor Standard Helicoil Resistors
Part Number Continuous
Amperes
Ohms Watts Class 150
15 sec on
30 sec off
Class 160
15 sec on
30 sec off
Quick
Quote
9855-0.50 27 0.50 365 49.0 45.0
9855-0.70 20 0.70 283 39.0 35.0
9855-1.0 17 1 289 32.0 30.0
9855-1.4 14 1.4 294 26.0 23.0
9855-2.0 13 2.0 338 24.0 20.0
9855-2.6 11 2.6 344 20.0 18.0
9855-3.5 10 3.5 386 17.2 16.0
9855-4.8 9 4.8 406 14.5 13.5
9855-5.0 8 5.0 328 14.0 12.5
9855-5.5 7 5.5 343 12.5 12.2
9855-6.0 7 6.0 347 13.0 12.0
9855-6.5 8 6.5 426 11.7 11.2
9855-8.6 7 8.6 421 10.2 9.5
9855-11.0 6 11.0 409 9.5 8.7
9855-12.0 5 12.0 403 9.0 8.5
9855-15.0 5 15.0 421 7.7 7.3
9855-20.0 4 20.0 423 6.6 6.3
9855-27.0 3 27.0 350 5.5 5.0
9855-36.0 3 36.0 324 4.1 4.0
9855-45.0 2 45.0 218 3.2 3.0
9855-62.0 2 62.0 256 2.7 2.6
9855-81.0 1 81.0 234 2.2 2.1






Filnor Standard Smooth Wirewound Resistors
Part Number Continuous
Amperes
Ohms Watts Quick
Quote
9856-A 2 7.2 6.27 325
9856-A 3 6.3 7.77 308
9856-A 4 5.64 9.81 312
9856-A 5 5 12.21 305
9856-A 6 4.5 15.33 310
9856-A 7 4 19.29 309
9856-A 8 3.56 24.28 308
9856-A 9 3.18 30.58 309
9856-A 10 2.8 38.46 302
9856-A 11 2.51 48.48 305
9856-A 12 2.25 61.05 309
9856-A 13 2 76.68 307
9856-A 14 1.77 96.72 303
9856-A 15 1.59 121.70 308
9856-A 16 1.4 153.00 300
9856-A 17 1.25 193.80 303
9856-A 18 1.12 244.20 306
9856-A 19 1 307.90 308
9856-A 20 1.85 87.97 301
9856-A 21 1.65 110.90 302
9856-A 22 1.48 139.70 306
9856-A 23 1.32 175.40 306
9856-A 24 1.17 221.30 303
9856-A 25 1.05 278.70 307
9856-A 26 0.92 350..20 296
9856-A 27 5.3 11.43 321
9856-A 28 4.7 14.38 318
9856-A 29 4.15 17.85 307
9856-A 30 3.7 22.45 307
9856-A 31 3.34 27.95 312
9856-A 32 2.97 35.07 309
9856-A 33 2.65 44.10 310
9856-A 34 2.35 55.58 307
9856-A 35 2.1 69.97 309
9856-B 4 24 0.52 300
9856-B 5 21.2 0.65 293
9856-B 6 19 0.82 296
9856-B 7 17 1.03 298
9856-B 8 15 1.29 290
9856-B 9 13.3 1.62 287
9856-B 10 11.9 2.04 289
9856-B 11 10.6 2.57 289
9856-B 12 9.35 3.21 281
9856-B 13 8.33 4.07 282
9856-B 14 7.49 5.10 286
9856-B 15 6.66 6.43 285
9856-B 16 5.95 8.09 286
9856-B 10 11.9 2.04 289
9856-B 20 15.7 1.16 286
9856-B 21 14 1.46 286
9856-B 22 12.5 1.83 286
9856-B 23 11.1 2.35 290
9856-B 24 9.9 2.96 290
9856-B 25 8.8 3.70 287
9856-B 26 7.6 4.66 269
9856-B 27 6.8 5.88 272
9856-B 29 5.3 9.30 261