21-40 SUPERIOR ELECTRIC, 21-40 Datasheet

21-40

Manufacturer Part Number

21-40

Description

Variable Transformer, 0 To 120 Voutput Voltage, 5 A Output Current, 120 VAC Input, 0 To 120 VAC Output, 120 Vinput Voltage Range, .6 KVA, Single Phase, Bench Encapsulated Termination

Manufacturer

SUPERIOR ELECTRIC

Datasheets

1.10C-40.pdf (2 pages)

2.21-40.pdf (2 pages)

Specifications of 21-40

Output Current

18A

Constant Current Load

18A

Knob Rotation

CW / CCW

Input Voltage

40V

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002105-091_Rev. I.indd 1

002105-091 REV I

MOUNTING TEMPLATE NO. 2

“A”

“F”

“D”

“C”

“B”

“E”

[68.32]

NOTE: All dimensions are in inches [millimeters]

2.69"

HOLES FOR 1/4"

BOLTS AS INDICATED

[100.07]

[26.92]

1.06"

3.94"

[98.55]

3.88"

TOP

BOTTOM OF STANDOFFS

[155.45]

6.12"

[187.45]

7.38"

[274.57]

10.81"

“E”

“B”

“F”

“D”

“C”

“A”

A POWERSTAT Variable Transformer is a precision product packed with care.

When unpacking, examine carefully for any shipping damage. Inspect the

brush contact with particular care. The “Damage and Shortage” Instructions

packed with the unit outline the proper procedure to follow if any parts are

damaged or missing.

NOTE- The unit should be protected from any dust or debris that may be

encountered while drilling holes, installing wiring, etc., during installation.

Manually operated single units are designed for back-of-panel mounting.

If they are to be bench or wall mounted, some cover should be provided

to support the dial and prevent contact with the electrically “hot” radiator

and commutator.

Drilling Template No. 1 shows standard 4-hole mounting and an alternate

3-hole mounting. For standard 4-hole mounting use 1/4” bolt of appropriate

type and length. The alternate mounting scheme allows the mounting screws

to be hidden by the dial but requires 1/4 - 20 ﬂ at head type screws whose

length can only be 1/8” to 3/16” longer than the thickness of the mounting

panel. To accommodate longer length screws, use 1/4” ﬂ at washers as

spacers between unit and the back of the panel. Three 6-32 x 3/16” binding

head screws are provided for dial mounting.

An accessory terminal pack, ordered separately, contains seven terminal

adapters for quick-connect terminations or for easy soldering (only three

adapters are required for any one connection).

BENCH OR WALL MOUNTING

BACK-OF-PANEL MOUNTING

Manually operated ganged assemblies are designed for back-of-panel

mounting. If they are to be mounted in an exposed position, some cover

should be provided to prevent contact with the electrically “hot” radiator

and commutator. Due to the weight of ganged assemblies, the four holes

“A” of Drilling Template No. 1 are recommended for mounting.

With ordinary care, a POWERSTAT Variable Transformer should require no

servicing except possible replacement of the brush assembly. The brush

should be inspected periodically and replaced if arcing takes place or if

it is badly worn. Because the brush must be of a special material, replace

only with the Superior Electric brush assembly listed below. The assembly is

designed to assure perfect contact of the brush to the commutator regardless

of brush position and length of time in use. Take care to avoid scraping,

scratching or marring the commutator surface.

Follow these steps to install a new brush assembly.

Important connection notes. Please read carefully.

on all products is reserved.

002105-091 REV I

28 SPRING LANE • SUITE 3 • FARMINGTON, CT 06032 USA

engineering reﬁ nements

Dimensions and other

details are subject to

1. Using Drilling Template No. 1, locate and drill the desired set of

2. Insert the shaft and adjust it so it will protrude about ¾” through the

3. Place the unit in position. Insert and tighten the mounting screws.

4. Mount the dial and its support(s). Place the knob on the shaft and position

1. Using Drilling Template No. 1 locate and drill the desired set of mounting

2. Insert the shaft and adjust it so it will project about ¾” through the

3. Place the unit in position behind the panel. Insert and tighten the

4. Mount the dial on the panel. Place the knob on the shaft and position the

1. Unfasten the brush assembly anchor screws and discard the old brush

2. Insert the new brush assembly in the radiator slot, replace the anchor

3. Raise the brush and place a piece of crocus cloth or very ﬁ ne

4. While holding the cloth or sandpaper in place, rotate the radiator

• CONNECTIONS AND RATINGS given in these instructions are

• For ambient temperatures between -20

• Coil to terminal connections for all 21, 22 and 21-40 Series units

• The CON N ECTION DIAG RAM S are labeled “L” for Line

• Clockwise (CW) and counterclockwise (CCW) rotation connections

• Fuses are recommended on all units as shown (

• COMMON shown in the connection diagrams is used as third

• Motor drive wiring is shown in Figure B.

The right to make

mounting bolt holes (4 holes “A” or three holes “B”).

dial after installation. Tighten the setscrews.

the pointer correctly in relation to the brush position and the dial indications.

Tighten the knob setscrews.

bolt holes (four holes “A” or three holes “B”), the three dial screw holes

“C” and the center shaft hole. The dial screw holes must be tapped to

accommodate the 6-32 screws supplied. Maximum panel thickness is

1/2 inch.

panel after installation. Tighten the setscrews.

mounting screws.

pointer correctly in relation to the brush position and the dial indications.

Tighten the knob setscrews.

assembly.

screws and tighten to the radiator. Be sure the back end of the brush

strap is under the projection at the rear of the radiator brush slot.

sandpaper between the brush and the commutator so the smooth

side is against the commutator and the abrasive side is toward the

brush.

through a short arc. Blow out the excess carbon particles.

those most commonly used. In addition, all ganged units may be

connected so that the units operate electrically independent on a

common shaft. When this is desired, connections and ratings for

the individual units may be obtained from the RATINGS CHART

and CONNECTION DIAGRAMS of the single unit.

current ratings given in the charts. Figure C shows the output

current de-rating required above 50

are shown in Figures A.

Connections and “B” for Boost Connections.

shown in the Ratings Chart and Connection Diagrams are for

motor driven units and manual units with the knob on the radiator

end. For connections with the knob on the base end, use the

shown CCW connection for the CW operation, and shown CW

connection for the CCW operation.

fuses are 18 ampere on 21-40, 5 ampere for the 21, and 3 ampere

on the 22. If used for constant impedance load connection the

fuses can be increased to a 25 ampere on the 21-40, 8 ampere

on the 21, and 4 ampere on the 22.

leg in 3-phase open delta, or neutral in single-phase 3-wire

and 3-phase 4-wire wye conﬁ gurations. COMMON is not used

in single-phase 2-wire or 3-phase 3-wire wye conﬁ gurations.

Jumper(s) provided in standard common position should be

moved or removed as required.

change.

MANUALLY OPERATED ASSEMBLIES

www.superiorelectric.com

MAINTENANCE

ACCESSORY TERMINAL PACK

INSTALLATION

INSPECTION

for INSTALLATION OPERATION and MAINTENANCE

INSTRUCTIONS

GANGED ASSEMBLIES

SINGLE UNITS

HARDWARE

POWERSTAT

CONNECTIONS AND RATINGS

VARIABLE TRANSFORMERS

WITH POWERKOTE

Telephone and Fax Numbers

Telephone

Fax

Customer Service

Product Application

21, 21-40 and 22 Series

C and +50

). Recommended

C use

860-507-2025

860-507-2050

860-507-2025, Ext. 70782

860-507-2025, Ext. 72058

Three 6-32 x 3/16” binding head screws are provided for dial mounting.

Four 1/4”-28 x 1/2” ﬂ at head screws are provided for mounting in panels 1/4”

to 3/8” thick. For thinner panels use 1/4” ﬂ at washers as spacers between

the unit and the panel. For thicker panels use 1/4”-28 screws 1/8” to 1/4”

longer than the panel thickness.

An accessory terminal pack, ordered separately, contains seven terminal

adapters for quick-connect terminations or for easy soldering (only three

adapters are required for any one connection).

BACK-OF-PANEL MOUNTING

MOUNTING ON SIDE BRAKETS

MOUNTING ON STANDOFFS

Motor-driven POWERSTAT Variable Transformers of the 21, 21-40 and 22

Series, both single units and ganged assemblies, may be mounted on side

brackets or on standoffs in the same manner as manually operated ganged

assemblies. 3-gang assemblies, however, have 3 side brackets, requiring 6

mounting bolts as shown in Template No. 2.

Whenever unusual mechanical or electrical difficulties are encountered in

the operation or inst allation of your P O W E R STAT Variable Transformer,

consult Superior Electric.

MODEL NUMBER

1. Using Drilling Template No. 1, locate and drill the four mounting bolt

2. Loosen the knob setscrews and remove the knob. Remove the dial.

3. Loosen the shaft setscrews in the hub of each radiator and adjust the

4. Place the unit in position. Insert and tighten the four ¼”-28 mounting

5. Mount the dial on the panel. Place the knob on the shaft and position

1. Using Drilling Template No. 2, locate and drill the proper set of

2. Loosen the shaft setscrews in the hub of each radiator and adjust

3. Insert the two top mounting bolts and screw them in part way.

4. Place the unit in position and insert the two bottom bolts. Tighten all

1. Using Drilling Template No. 1 locate and drill the four mounting bolt

2. Loosen the knob setscrews and remove the knob. Remove the dial.

3. Loosen the shaft setscrews in the hub of each radiator and adjust

4. Place the unit in position. Insert and tighten the mounting bolts. A 3-

5. Mount the dial and its supports. Place the knob on the shaft and

5. Remove the cloth or sandpaper and rotate the radiator over the full

holes “A”, the 3 dial screw holes “C” and the center shaft hole. The

dial screw holes must be tapped to accommodate the 6-32 screws

supplied. Maximum panel thickness is 1/2 inch.

shaft so it will project about ¾” through the panel after installation.

Tighten the setscrews on the ﬁ rst unit. Turn all radiators to the extreme

limit of travel (zero position) and tighten the shaft setscrews on the

remaining unit(s).

screws. A 3-gang assembly, because of its added length and weight,

requires extra support in the form of a bracket or shelf.

the pointer correctly in relation to the brush position and the dial

indications. Tighten the knob setscrews.

mounting holes. BE SURE TO USE THE PROPER SET OF HOLES.

the shaft so it will project about ¾” through the dial after installation.

Tighten the setscrews on the ﬁ rst unit. Turn all radiators to the extreme

limit of travel (zero position) and tighten the shaft setscrews on the

remaining unit(s).

the bolts. Mount the dial and its supports. Place the knob on the shaft

and position the pointer correctly in relation to the brush position and

the dial indications. Tighten the knob setscrews.

holes “A”.

the shaft so it will project about ¾” through the dial after installation.

Tighten the setscrews on the ﬁ rst unit. Turn all the radiators to the

extreme limit of travel (zero position) and tighten the shaft setscrews

on the remaining unit(s).

gang assembly, if mounted on a vertical panel, requires extra support

in the form of a bracket or shelf.

position the pointer correctly in relation to the brush position and the

dial indications. Tighten the knob setscrews.

range several times to check for smooth travel of the brush over

the commutator surface. The brush should ﬁ t ﬂ at over the entire

commutator range. No space should be visible between the brush

and the surface.

21-40

COILS

REPLACEMENT BRUSH ASSEMBLIES

FIGURE A

ACCESSORY TERMINAL PACK

MOTOR-DRIVEN ASSEMBLIES

100

40°C

104°F 122°F

Toll-Free (in USA and Canada only)

Telephone

Fax

Customer Service

Product Application

PART NUMBER

BRUSH ASSEMBLY

50°C

060098-001

060098-002

060117-001

HARDWARE

AMBIENT TEMPERATURE

INPUT 120 V.

50/60 Hz

140°F

60°C

FIGURE C

LOWER

RAISE

FIGURE B - MOTOR DRIVE WIRING

158°F

70°C

1-800-787-3532

1-800-821-1369

1-800-787-3532, Ext. 70782

1-800-787-3532, Ext. 72058

RB21-40/Brush Assembly

DRIVE MOTOR

RB22/Brush Assembly

RB21/Brush Assembly

176°F

80°C

LIMIT SWITCH

DESCRIPTION

LOWER

194°F

90°C

Printed in USA

RESISITOR

LIMIT SWITCH

2/2/2007 12:55:28 PM

UPPER

ECN 96200

Related parts for 21-40

21-40 Summary of contents

Page 1

... CCW connection for the CW operation, and shown CW connection for the CCW operation. • Fuses are recommended on all units as shown ( fuses are 18 ampere on 21-40, 5 ampere for the 21, and 3 ampere on the 22. If used for constant impedance load connection the fuses can be increased ampere on the 21-40, 8 ampere on the 21, and 4 ampere on the 22. • ...

Page 2

... CONNECTION DIAGRAMS (Viewed from the Radiator End) #1 CCW #3 CCW Terminals & Rotation Model Numbers Input Output Jumper Manually Motor Conn Operated Driven Diag. CCW CCW CCW 21-40 ME21-40 13 Terminals & Rotation Model Numbers Input Output Jumper Manually Motor Conn Operated Driven Diag. CCW CCW CCW 1-2 1-3 ...

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