POST GLOVER RESISTORS INC

POST GLOVER RESISTORS INC.

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Introduction

Post Glover specializes in motor control resis-tors—the most popular use of our resistors—forsevere duty applications. Our resistors make itpossible to start and stop extremely powerfulelectric motors—such as those on cranes, com-pressors, and pumps—with safety and precision.

The resistor functions to control the torqueand/or speed of an electrical motor or limit theinitial current inrush to an acceptable level. Thisis accomplished through the use of manual ormagnetic controls, or with solid-state controls.

In harsh environments, such as foundries andsteel mills, motors and resistors must be able towithstand “plugging”—a type of motor brakingprovided by reversing the voltage polarity orphase sequence so that the motor develops acounter-torque and brakes the load.

They must also withstand dynamic braking,fast acceleration of heavy loads, large amountsof dust and dirt, and occasional operator abuse.In these instances, Post Glover’s stainless steelstamped grid resistors offer excellent service andcost efficiency.

The most popular uses of Post Glover resistorsare control of AC wound rotor induction motors(slip ring motors), DC series wound motors, andAC squirrel cage induction motors. Our resistorsare also commonly used for wye-delta closed-transition starting applications.

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AC Wound Rotor Induction MotorAC Wound Rotor Induction MotorAC Wound Rotor Induction MotorAC Wound Rotor Induction MotorAC Wound Rotor Induction Motor(Slip Ring Motor)(Slip Ring Motor)(Slip Ring Motor)(Slip Ring Motor)(Slip Ring Motor)

The resistor is wired into the motorsecondary slip rings, where it dissi-pates torque energy in the form ofheat. It also provides “soft starting”as resistance is removed in steps.

DC Series Wound MotorDC Series Wound MotorDC Series Wound MotorDC Series Wound MotorDC Series Wound Motor

The resistor limits torque by limiting currentflow to the motor. It is used for starting andstopping the motor.

Initial information needed for sizing yourresistor:

y Application

y Horsepower

y Line voltage

y Full load amps

y Starting torque

y Number of speeds

y Duty/NEMA class (see tables)

y For dynamic lowering applications,include manufacturer of control

Initial information needed for sizingyour resistor:

y Application

y Horsepower

y Secondary volts

y Secondary amps

y Starting torque

y Number of speeds


Motor Control

Post Glover sled-mounted motor-startingPost Glover sled-mounted motor-startingPost Glover sled-mounted motor-startingPost Glover sled-mounted motor-startingPost Glover sled-mounted motor-startingresistors for the mining industryresistors for the mining industryresistors for the mining industryresistors for the mining industryresistors for the mining industry

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AC Squirrel Cage Induction MotorAC Squirrel Cage Induction MotorAC Squirrel Cage Induction MotorAC Squirrel Cage Induction MotorAC Squirrel Cage Induction Motor

Commonly known as a “reduced-voltage” or“ballast” resistor, this resistor acts as a voltagedivider for soft starting of the motor.

Initial information needed for sizing your resistor:

y Application

y Horsepower

y Line voltage

y Full load amps

y Duty cycle/NEMA class (see tables)

Wye-Delta Closed-Transition StartingWye-Delta Closed-Transition StartingWye-Delta Closed-Transition StartingWye-Delta Closed-Transition StartingWye-Delta Closed-Transition Starting

Wye-delta is a reduced-inrush startingmethod in which 3-phase motor stator coils areinitially connected in a wye configuration andswitched to delta as the motor’s speed in-creases. The resistor works as a reduced-voltage starting resistor by starting a motor at58% reduced voltage.

Initial information needed for sizing yourresistor:

y Application

y Horsepower

y Line voltage

y Full load amps

y Duty/NEMA class(see tables)

For other applications, such as small horse-For other applications, such as small horse-For other applications, such as small horse-For other applications, such as small horse-For other applications, such as small horse-powerpowerpowerpowerpower motors motors motors motors motors, dynamic braking, and field, dynamic braking, and field, dynamic braking, and field, dynamic braking, and field, dynamic braking, and fielddischarge, please give us a call. We offer freedischarge, please give us a call. We offer freedischarge, please give us a call. We offer freedischarge, please give us a call. We offer freedischarge, please give us a call. We offer freeengineering assistance to our customers for allengineering assistance to our customers for allengineering assistance to our customers for allengineering assistance to our customers for allengineering assistance to our customers for allmotor control applications.motor control applications.motor control applications.motor control applications.motor control applications.

Wye-Delta Closed Transition Starting ResistorsWye-Delta Closed Transition Starting ResistorsWye-Delta Closed Transition Starting ResistorsWye-Delta Closed Transition Starting ResistorsWye-Delta Closed Transition Starting Resistors

230 VOLTS AC*230 VOLTS AC*230 VOLTS AC*230 VOLTS AC*230 VOLTS AC*DIMENSIONS POST GLOVER

HP FLA A B C D P/N1 4.2 15" 10" 6" 13.5" YD- 10 -230

1.5 6 15" 10" 6" 13.5" YD- 15 -2302 6.8 15" 10" 6" 13.5" YD- 20 -2303 9.6 15" 10" 6" 13.5" YD- 30 -2305 15.2 15" 10" 6" 13.5" YD- 50 -230

7.5 22 15" 10" 6" 13.5" YD- 75 -23010 28 15" 10" 6" 13.5" YD- 100 -23015 42 15" 10" 6" 13.5" YD- 150 -23020 54 15" 10" 6" 13.5" YD- 200 -23025 68 15" 10" 6" 13.5" YD- 250 -23030 80 15" 10" 6" 13.5" YD- 300 -23040 104 15" 10" 6" 13.5" YD- 400 -23050 130 15" 10" 6" 13.5" YD- 500 -23060 154 15" 10" 6" 13.5" YD- 600 -23075 192 15" 10" 6" 13.5" YD- 750 -230

100 248 15" 10" 6" 13.5" YD-1000 -230125 312 15" 10" 6" 13.5" YD-1250 -230150 360 15" 10" 6" 13.5" YD-1500 -230200 480 22" 10" 6" 20.5" YD-2000 -230250 600 22" 10" 6" 20.5" YD-2500 -230300 720 22" 10" 6" 20.5" YD-3000 -230350 840 29.5" 10" 6" 28.0" YD-3500 -230400 960 22" 10" 11" 20.5" YD-4000 -230450 1080 22" 10" 11" 20.5" YD-4500 -230500 1200 22" 10" 11" 20.5" YD-5000 -230


HP FLA A B C D P/N1 2.1 15" 10" 6" 13.5" YD- 10 460

1.5 3 15" 10" 6" 13.5" YD- 15 4602 3.4 15" 10" 6" 13.5" YD- 20 4603 4.8 15" 10" 6" 13.5" YD- 30 4605 7.6 15" 10" 6" 13.5" YD- 50 460

7.5 11 15" 10" 6" 13.5" YD- 75 46010 14 15" 10" 6" 13.5" YD- 100 46015 21 15" 10" 6" 13.5" YD- 150 46020 27 15" 10" 6" 13.5" YD- 200 46025 34 15" 10" 6" 13.5" YD- 250 46030 40 15" 10" 6" 13.5" YD- 300 46040 52 15" 10" 6" 13.5" YD- 400 46050 65 15" 10" 6" 13.5" YD- 500 46060 77 15" 10" 6" 13.5" YD- 600 46075 96 15" 10" 6" 13.5" YD- 750 460

100 124 15" 10" 6" 13.5" YD-1000 460125 156 15" 10" 6" 13.5" YD-1250 460150 180 15" 10" 6" 13.5" YD-1500 460200 240 22" 10" 6" 20.5" YD-2000 460250 300 22" 10" 6" 20.5" YD-2500 460300 360 22" 10" 6" 20.5" YD-3000 460350 420 29.5" 10" 6" 28" YD-3500 460400 480 29.5" 10" 6" 28" YD-4000 460450 540 29.5" 10" 6" 28" YD-4500 460500 600 29.5" 10" 6" 28" YD-5000 460

* All units are provided with a mill galvanized louvered cover.


HP FLA A B C D P/N3 3.9 15" 10" 6" 13.5" YD- 30 5755 6.1 15" 10" 6" 13.5" YD- 50 575

7.5 9 15" 10" 6" 13.5" YD- 75 57510 11 15" 10" 6" 13.5" YD-100 57515 17 15" 10" 6" 13.5" YD-150 57520 22 15" 10" 6" 13.5" YD-200 57525 27 15" 10" 6" 13.5" YD-250 57530 32 15" 10" 6" 13.5" YD-300 57540 41 15" 10" 6" 13.5" YD-400 57550 52 15" 10" 6" 13.5" YD-500 57560 62 15" 10" 6" 13.5" YD-600 57575 77 15" 10" 6" 13.5" YD-750 575

100 99 15" 10" 6" 13.5" YD-1000 575125 125 15" 10" 6" 13.5" YD-1250 575150 144 15" 10" 6" 13.5" YD-1500 575200 192 22" 10" 6" 20.5" YD-2000 575250 240 22" 10" 6" 20.5" YD-2500 575300 288 29.5" 10" 6" 28" YD-3000 575350 336 29.5" 10" 6" 28" YD-3500 575400 384 29.5" 10" 6" 28" YD-4000 575450 432 29.5" 10" 6" 28" YD-4500 575500 480 29.5" 10" 6" 28" YD-5000 575

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Crane Control

Steel mill ore bridgeSteel mill ore bridgeSteel mill ore bridgeSteel mill ore bridgeSteel mill ore bridgeusing DC motorusing DC motorusing DC motorusing DC motorusing DC motorcontrol resistorscontrol resistorscontrol resistorscontrol resistorscontrol resistors

When overhead cranes are used in industrialfacilities, resistor banks are frequently used forcontrol of hoisting and lowering speeds, aswell as positioning the crane itself. Resistorsare usually mounted in, or on top of, the bridgestructure.

Many steel mills use DC motors because, inthe past, DC power was the best way to hoistheavy loads. Newer plants are increasinglyutilizing more readily available three-phasepower, and wound rotor motors are oftenemployed.

In hoisting and lowering operations, somespecial considerations are involved. Hoisting isstraightforward—the load is resisting themotor, and positive torque against gravity isrequired. In lowering an empty hook, it may benecessary to drive the hook down, since grav-ity may be insufficient to lower it at the desiredspeed.

But, when the hook is loaded, the load maytend to overhaul the motor, which then mayhave to apply a retarding torque as if it werehoisting. Dynamic braking ensures the loadwon’t run away and crash instead of making asoft landing.

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Crane control circuit includesCrane control circuit includesCrane control circuit includesCrane control circuit includesCrane control circuit includesa series brake and resistorsa series brake and resistorsa series brake and resistorsa series brake and resistorsa series brake and resistorsfor dynamic braking.for dynamic braking.for dynamic braking.for dynamic braking.for dynamic braking.

All of these conditions require modifica-tions of the speed-torque curve of thehoist motor. This is readily achieved byapplying the proper amount of externalarmature and field resistance.

A resistor bank is the practical deviceavailable for the purpose. Operators effectchanges in motor speed with variousloads and operate a bank of magneticcontactors to achieve the desired opera-tion. The contactors change taps on theresistor banks as required to maintainappropriate rotor circuit resistance.

Post Glover’s stainless steel grid resis-tors are an excellent choice for heavyindustrial applications because of theirdurability and dependability in severeenvironments.

Initial information needed for sizingyour resistor:

y Application

y Horsepower

y Line voltage

y Full load amps

y Starting torque

y Number of speeds


y For dynamic lowering applica-tions, include maufacturer ofcontrol package.

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Dynamic Braking

Braking resistorBraking resistorBraking resistorBraking resistorBraking resistorfor AC variable-for AC variable-for AC variable-for AC variable-for AC variable-frequency drivefrequency drivefrequency drivefrequency drivefrequency drive

Dynamic braking resistorDynamic braking resistorDynamic braking resistorDynamic braking resistorDynamic braking resistorpackages come in all shapespackages come in all shapespackages come in all shapespackages come in all shapespackages come in all shapesand sizes, designed withand sizes, designed withand sizes, designed withand sizes, designed withand sizes, designed withcustomer flexibility in mind.customer flexibility in mind.customer flexibility in mind.customer flexibility in mind.customer flexibility in mind.

Dynamic braking resistors are used on ACvariable frequency drives (VFDs) to dissipateenergy that is produced in the motor as thedrive provides braking torque to stop themotor. The resistors are either used alone fordecelerating or in conjunction with com-pressed-air brakes for stopping. The excitationvoltage of the traction motors generally comesfrom a static converter powered by the over-head catenary and operates as a DC voltagetransformer.

Dynamic Braking TechnologyDynamic Braking TechnologyDynamic Braking TechnologyDynamic Braking TechnologyDynamic Braking Technology

Resistors integrated into the power unitdissipate electrical energy created by electricbraking systems. The dynamic braking resis-tor is connected to the DC bus and will seevoltages as high as 800 volts during brakingconditions.

The drive manufacturer normally deter-mines the power rating (watts) needed toprevent overheating during braking duty.The peak braking current is determined bythe specified resistance value. Each drivemanufacturer specifies a resistance rangewith a minimum to prevent overcurrent anddamage to the drive and a maximum valueto give adequate lower dissipation capability.

A three-phase variable frequency drive(VFD) consists of three basic components—rectifier, DC line, and inverter—and a controlsystem to manage these three components asillustrated above. The rectifier converts thethree-phase 60Hz AC input to a DC signal.

Depending on the system, an inductor, acapacitor, or combination of these compo-nents smoothes the DC signal (reducesvoltage ripple) in the DC link part of theVFD. The inverter circuit converts the DCsignal into a variable frequency AC voltageto control the speed of the induction motor.

During braking, the VFD ramps thefrequency to zero. The rotational energy ofthe motor and load are driven back throughthe inverter to the DC bus and the rotationalenergy is dissipated through the resistor.

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Dynamic Braking Resistor DesignsDynamic Braking Resistor DesignsDynamic Braking Resistor DesignsDynamic Braking Resistor DesignsDynamic Braking Resistor Designs

Our LC wirewound resistors are used formost dynamic braking applications. Theseare conveniently provided on L-shapedmounting brackets or in standard enclosureswith louvered or screened covers. For slightlyhigher wattage applications, our EW-styleedgewound resistor is proven highly effi-cient.

For heavy duty applications that requireeven higher wattage, we recommend PostGlover stainless steel stamped grid resistorelements. The stamped grid design wasdeveloped and patented by Post Glover over60 years ago and is used around the worldfor severe-duty applications.

Information Required for SizingInformation Required for SizingInformation Required for SizingInformation Required for SizingInformation Required for Sizing

Three factors must be known for sizing yourresistor:

1. Ohms

2. Watts

3. Braking cycle (time on/time off)

4. Drive manufacturer

Ohms are determined by the drive manufac-turer and are usually stated as a range or aminimum value.

Watts are stated as either a maximum brak-ing power or continuous braking power. Ineither case, the wattage rating of the resistor iscalculated by the braking cycle.

Braking cycle is usually stated as a percent-age; however, the actual times on and off arerequired to offer the optional resistor packagewhile minimizing the size and cost.

ExampleExampleExampleExampleExample

An application requires a braking resistorrated 25 ohms with an average power duringbraking of 2500 watts. The duty cycle is 20%—10 seconds on and 40 seconds off—with a cycletime of 50 seconds.

The ohmic value of the resistor is typicallybetween -0% and +5%—therefore, 25.0–26.25ohms.

Braking Duty CycleBraking Duty CycleBraking Duty CycleBraking Duty CycleBraking Duty Cycle

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ConstructionConstructionConstructionConstructionConstruction

These units consist of three smoothwoundadjustable resistors in a ventilated, wall-mountenclosure. Knockouts are provided on bothends for convenient and fast wiring. A remov-able front cover provides easy access to coilsfor adjusting the starting torque or speed.

230 VACBR-14-230 1/4 46.5 1.4BR-13-230 1/3 46.5 1.8BR- 1 2-230 1/2 19.8 2.1BR-34-230 3/4 15.2 2.8BR-100-230 1 10.0 3.5BR-150-230 1 1/2 7.5 4.8BR-200-230 2 5.5 6.3BR-300-230 3 3.8 9.0BR-500-230 5 2.7 14.0

460 VACBR-14-460 1/4 150.0 .7BR-13-460 1/3 150.0 .9BR-12-460 1/2 68.0 1.0BR-34-460 3/4 48.0 1.4BR-100-460 1 39.0 1.7BR-150-460 1 1/2 28.0 2.4BR-200-460 2 19.5 3.2BR-300-460 3 16.8 4.5BR-500-460 5 12.4 7.0

575 VACBR-12-575 1/2 106.0 .8BR-34-575 3/4 75.0 1.1BR-100-575 1 62.7 1.4BR-150-575 1 1/2 46.2 1.9BR-200-575 2 32.5 2.5BR-300-575 3 23.7 3.5BR-500-575 5 17.5 5.6

* Continuous Amp capacity at 375º rise.† Resistance in Ohms at 25ºC.

3-LEG ADJUSTABLE BALLAST RESISTORS3-LEG ADJUSTABLE BALLAST RESISTORS3-LEG ADJUSTABLE BALLAST RESISTORS3-LEG ADJUSTABLE BALLAST RESISTORS3-LEG ADJUSTABLE BALLAST RESISTORS

Part NumberPart NumberPart NumberPart NumberPart Number HorsepowerHorsepowerHorsepowerHorsepowerHorsepower Ohms†Ohms†Ohms†Ohms†Ohms† Cont. Amps*Cont. Amps*Cont. Amps*Cont. Amps*Cont. Amps*

3-Leg adjustable ballast resistors are used withsmall horsepower, typically 1/4 to 5 HP, squirrel-cage induction motors for soft strating, reducedspeed or two speed control of small cranes.Additional ratings up to 10 horsepower areavailable.

These resistors are factory set for 70% reducedvoltage (50% of normal starting torque) and areavailable for 230, 460 and 575 volts AC.

3-Leg Adjustable Ballast Resistors

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NEMA Classification of Resistors

CLASS NUMBERS APPLYING TO DUTY CYCLESCLASS NUMBERS APPLYING TO DUTY CYCLESCLASS NUMBERS APPLYING TO DUTY CYCLESCLASS NUMBERS APPLYING TO DUTY CYCLESCLASS NUMBERS APPLYING TO DUTY CYCLESApprux. Per Cent ofFull Load Current 30 Sec. on Out 5 Sec. on Out 10 Sec. on Out l5 Sec. on Out 15 Sec. on Out 15 Sec. on Out 15 Sec. on Out Continuous

on First Point of Each 15 Min. of Each 80 Sec. of Each 80 Sec. of Each 90 Sec. of Each 60 Sec. of Each 45 Sec. of Each 30 Sec. Duty25 101 111 131 141 151 161 171 9150 102 112 132 142 152 162 172 9270 103 113 133 143 153 163 173 93

100 104 114 134 144 154 164 174 94150 105 115 135 145 155 165 175 95

200 or over 106 116 136 146 156 166 176 96

When an armature shunt resistor is added, the class number shall include the Suffix-AS. Example: Class 155-AS is a resistor which includes anarmature shunt and which will allow an initial inrush of 150 percent with the armature shunt open. When a dynamic braking resistor is added, theclass number shall include the suffix-DB.

Table of Classification of ResistorsTable of Classification of ResistorsTable of Classification of ResistorsTable of Classification of ResistorsTable of Classification of Resistors

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InstallationInstallationInstallationInstallationInstallation Resistance Class NumberResistance Class NumberResistance Class NumberResistance Class NumberResistance Class Number

Levelers ............................................................ 153Manipulator Fingers ............................... 153-163Pickling Machine ............................................ 153Pilars–Slab ....................................................... 153Racks ................................................................ 153Reelers .............................................................. 135Saws–Hot or Cold ............................................ 155Screw Downs ........................................... 153-163Shears ............................................................... 155Shuffle Bars ..................................................... 155Side Guards ............................................. 153-163Sizing Rolls ...................................................... 155Slab Buggy ....................................................... 155Soaking Pit Covers .......................................... 155Straighteners ................................................... 153

CRANESCRANESCRANESCRANESCRANESTables–Approach ............................................. 153Lift ............................................................. 153-163Roll .................................................................... 153Shear Approach ....................................... 153-163Transfer ............................................................. 153Main Roll ................................................. 153-163Tilting Furnace ................................................ 153Wire Stranding Machine ................................ 153

CRANES–GENERAL PURPOSECRANES–GENERAL PURPOSECRANES–GENERAL PURPOSECRANES–GENERAL PURPOSECRANES–GENERAL PURPOSEHoist ................................................................. 153Bridge or Trolley with

Roller Bearings .......................................... 152Sleeve Bearings ........................................ 153

FLOUR MILLSFLOUR MILLSFLOUR MILLSFLOUR MILLSFLOUR MILLSLine Shafting ................................................... 135

FOOD PLANTSFOOD PLANTSFOOD PLANTSFOOD PLANTSFOOD PLANTSButter Churns .................................................. 135Dough Mixers .................................................. 135

HOISTSHOISTSHOISTSHOISTSHOISTSWinch ............................................................... 153Mine Slope ...................................................... 172Mine Vertical ................................................... 162Contractor’s Hoists ......................................... 152

LARRY CARSLARRY CARSLARRY CARSLARRY CARSLARRY CARS ......................................................... 153LIFT BRIDGESLIFT BRIDGESLIFT BRIDGESLIFT BRIDGESLIFT BRIDGES ...................................................... 152MACHINE TOOLSMACHINE TOOLSMACHINE TOOLSMACHINE TOOLSMACHINE TOOLS

Bending Rolls ........................................... 163-164Boring Mills ..................................................... 135Bulldozers ........................................................ 135Drills ................................................................. 115Gear Cutters .................................................... 115Grinders ........................................................... 135Hobbing Machines ......................................... 115Lathes ............................................................... 115Milling Machines ........................................... 115Presses .............................................................. 135Punches ............................................................ 135Saws ................................................................. 115Shapers ............................................................ 115

NEMA Resistor Application TableNEMA Resistor Application TableNEMA Resistor Application TableNEMA Resistor Application TableNEMA Resistor Application Table


BLOWERSBLOWERSBLOWERSBLOWERSBLOWERSCentrifugal ................................................. 133-93Constant Pressure ..................................... 135-95

BRICK PLANTSBRICK PLANTSBRICK PLANTSBRICK PLANTSBRICK PLANTSAugers .............................................................. 135Conveyors ........................................................ 135Dry Pans ........................................................... 135Pug Mills .......................................................... 135

BY-PRODUCT COKE PLANTSBY-PRODUCT COKE PLANTSBY-PRODUCT COKE PLANTSBY-PRODUCT COKE PLANTSBY-PRODUCT COKE PLANTSDoor Machine .................................................. 153Leveler Ram ..................................................... 153Pusher Bar ........................................................ 153Valve Reverating Machine ............................. 153

CEMENT MILLSCEMENT MILLSCEMENT MILLSCEMENT MILLSCEMENT MILLSConveyors ........................................................ 135Crushers ........................................................... 145Elevators .......................................................... 135Rolary Dryers ............................................. 145-95Grinders and Pulverizers ................................ 135Kilns ............................................................ 135-95

COAL AND ORE BRIDGESCOAL AND ORE BRIDGESCOAL AND ORE BRIDGESCOAL AND ORE BRIDGESCOAL AND ORE BRIDGESBridge ............................................................... 153Closing ............................................................. 162Holding ............................................................ 162Trolley ............................................................... 163

COAL MINESCOAL MINESCOAL MINESCOAL MINESCOAL MINESCar Hauls ......................................................... 162Conveyors .................................................. 135-55Cutters .............................................................. 135Crushers ........................................................... 145Fans ............................................................ 134-93Hoists–

Slope .......................................................... 172Vertical ....................................................... 162

Jigs ................................................................... 135Picking Tables .................................................. 135Rotary Car Dumpers ..................................... 153Shaker Screens ................................................ 135

COMPRESSORSCOMPRESSORSCOMPRESSORSCOMPRESSORSCOMPRESSORSConstant Speed ............................................... 135Varying Speed–

Centrifugal ................................................. 93Plunger Type ............................................... 95

CONCRETE MIXERSCONCRETE MIXERSCONCRETE MIXERSCONCRETE MIXERSCONCRETE MIXERS ........................................... 135CRANESCRANESCRANESCRANESCRANES

Hoist .......................................................... 153-163Bridge or Trolley with

Roller Bearings .................................. 152-162Sleeve Bearings ................................ 153-163

Crushers ........................................................... 145Furnace Doors ................................................. 155Gas Valves ........................................................ 155Gas Washers ..................................................... 155Hot Metal Mixers ............................................ 163Ingot Buggy ..................................................... 153Kickoff .............................................................. 153

The following table is intended as a guide in the specifying ordesigning of resistors. The classifications are those that experiencehas shown to be correct for the average installation. There will,however, be exceptions. This table is applicable to nonbreakablesteel grid resistors, provided that the time-on period does notexceed the values given in the Table of Classification of Resistors.


METAL MININGMETAL MININGMETAL MININGMETAL MININGMETAL MININGBall, Rod and Tube Mills ................................. 135Car Dumpers–Rotary ....................................... 153Converters–Cooper .......................................... 154Conveyors ........................................................ 135Crushers ........................................................... 145Tilting Furnace ................................................ 153

PAPER MILLSPAPER MILLSPAPER MILLSPAPER MILLSPAPER MILLSBeaters .............................................................. 135Calenders ................................................... 154-92

PIPEWORKINGPIPEWORKINGPIPEWORKINGPIPEWORKINGPIPEWORKINGCutting and Threading ................................... 135Expanding and Flanging .......................... 135-95

POWER PLANTSPOWER PLANTSPOWER PLANTSPOWER PLANTSPOWER PLANTSClinker Grinders .............................................. 135Coal Crushers .................................................. 135Conveyors–

Belt ............................................................. 135Screw ......................................................... 135

Pulverized Fuel Feeders ................................. 135Pulverizers–

Ball Type .................................................... 135Centrifugal ................................................ 134

Stokers ........................................................ 135-93PUMPSPUMPSPUMPSPUMPSPUMPS

Centrifugal ................................................. 134-93Plunger ....................................................... 135-95

RUBBER MILLSRUBBER MILLSRUBBER MILLSRUBBER MILLSRUBBER MILLSCalenders ......................................................... 155Crackers ........................................................... 135Mixing Mills .................................................... 135Washers ............................................................ 135

STEEL MILLSSTEEL MILLSSTEEL MILLSSTEEL MILLSSTEEL MILLSAccumulators ................................................... 153Casting Machines–Pig .................................... 153Charging Machines–

Bridge ................................................ 153-163Peel ..................................................... 153-163Trolley ................................................ 153-163

Coiling Machines ............................................ 135Converters Metal ............................................ 154Conveyors ................................................ 135-155

WOODWORKING PLANTSWOODWORKING PLANTSWOODWORKING PLANTSWOODWORKING PLANTSWOODWORKING PLANTSBoring Machine ............................................... 115Lathe ................................................................. 115Mortiser ............................................................ 115Moulder ............................................................ 115Planers .............................................................. 115Power Trimmer and Mitre ............................... 115Sanders ............................................................ 115Saws ................................................................. 115Shapers ............................................................ 115Shingle Machine ............................................. 115

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Post Glover makes hundreds of designs of motor control, crane control,dynamic braking, and ballast resistors. For the best value and maximumperformance from your resistors, consult with one of our resistor engineer-ing design consultants about your application. Knowledgeable solutionshave made Post Glover a leader in heavy-duty resistors, worldwide.

Post Glover: Heavy-Duty Resistors for Tough Applications

p Neutral Grounding Resistors p Transit and Locomotive

p High Resistance Grounding Systems p Off-Highway Trucks

p Harmonic Filtering p Enclosures

p Load Banks p Ballast Resistors

p Motor and Crane Control p Heaters

p Dynamic Braking p Custom Resistor Designs

For pricing information, please contact us at 1-800-537-6144 (U.S.A. only)For pricing information, please contact us at 1-800-537-6144 (U.S.A. only)For pricing information, please contact us at 1-800-537-6144 (U.S.A. only)For pricing information, please contact us at 1-800-537-6144 (U.S.A. only)For pricing information, please contact us at 1-800-537-6144 (U.S.A. only)

Phone: (859) 283-0778

Fax: (859) 283-2978

Erlanger, KY 41018 USA1369 Cox Avenue

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POST GLOVER RESISTORS INC