SPECIFICATIONS

• Underwriters Laboratories label available on most switches.

• Test Switches are built to ANSI C12.9 standards

• Test Switch ratings are 30 ampere at 600 VAC

TEST SWITCH DIVISION

The Durham Company Manufactures a complete line of Test Switches for metering, relay circuits, instrument circuits, calibration, disconnection and testing. This catalog lists only our most common metering test switches. If you are unable to find a switch in I this catalog please contact us with your requirements.

BASES

Glass filled polyester (molded) bases are supplied on standard spacing models. Arboron (cut bases are supplied on special spacing or mounting requirements.

Bases offer non-tracking, 600 VAC, high strength, and superior longevity. Customer provisions are supplied for¼” mounting screws or bolts.

BLADES

Copper knife blades provide superior contacts. Blades can be supplied with 45 or 90 degree stops.

 

 3BLADE
HANDLE 4

HANDLES

Nylon (2) two piece handles are supplied as red potentials and black currents as standard. Handles are ultra-sonic welded.

 

SHORT CIRCUIT ASSEMBLY

Copper components with a make before break design for shorting out the current transformer.

TESTING EARS

Test ears are supplied as standard with stud/nut connections. The ears are corrugated for secure clamping of test leads.

 

CONNECTIONS

Front and back connected test switches are furnished with 10/32 stud with brass hex nut (3/8” across flats) as standard.

NEUTRAL ASSEMBLY

Copper solid thru-bar furnished as standard.

 

BARRIERS

Insulating barriers are furnished on all potential assemblies having 1” or less spacing to next switch element.

AVAILABLE OPTIONS

PLATING

Test Switches are supplied in bare copper as standard.

PLATING

Test Switches are available with Tin, Nickel, or Silver Plating.

REVERSE POTENTIAL

Potential switch reversed for additional safety allows potential to be fixed.

NEUTRAL

Knife blade (dis-connectable) neutral can be furnished

REINFORCING SPRINGS

Knife blade hinge and Jaws can be equipped with Belleville style reinforcing spring.

CONNECTIONS

Box style connectors #18 through #6 CU or #4 through #2 CU are available.

HANDLES

Nylon (2) two-piece handles are available in (8) colors besides the standard. These colors allow matching to the customers wiring. Handles are ultra-sonic welded.

HANDLE GANGING

Handles can be supplied multi-ganged where required.

INTERLOCKS

Interlocking allowing certain blades to be operated only after other blades are first opened is available.

COVERS

Optional covers are available in clear Lexan or black fiberglass. Covers come with mounting studs and wing nuts for mounting to Test Switches. Studs and

wing nuts have provisions for sealing.

CURRENT SAF-T-PLUG

Optional Saf-T-Plug is available to allow current measurement in the Test Jack without interrupting the permanent wiring.

Test Switch Division

Mounting Dimensions

Accessories & SAF-T-PLUG

Note: Front connected covers have ¼” cutout front and back for wiring. Back connected covers do not have any cutouts. Mounting stud kits come with the covers.

TEST SWITCH

FAMILY

Resources

Partners

Training

Documentation

Employment

 

 

Other

Newsletter

Catalog

Terms or Service

Privacy Policy

Social Media

 

722 Durham Road . P.O. Box 908 . Lebanon, Missouri . 417-532-7121

 

 3BLADE
HANDLE 4
 3BLADE
HANDLE 4