Hookstick Disconnect Switch Type: BT2 Orientation: Upright mounting Ratings: 7.5 kV through 34 kV Ratings A: 600, 1200 Amperes Request Bulletin E101 Download PDF Catalog

The Turner "BT2" switch is a hookstick operated switch used for changing connections in a circuit or for isolating purposes. Switches are available for vertical or underhung mounting in voltage ratings of 7.5, 15, 23 and 34 kV; 600 and 1200 amperes. Type "BT2" switches meet all applicable IEEE and NEMA Specifications.

Rigid Blade
Blades are made of 98% hard-drawn copper, formed into a trussed "A" frame shape that resists side thrusts and assures proper blade-contact alignment when closing the switch. An adjustable stop is provided on the blade for 90º, 105º or 135º openings. Stops are factory set for 90º opening unless otherwise specified.

A positive latch holds the blade in a closed position during short circuits. A powerful lever action has been built into the pull ring mechanism so that the operator with a hookstick can break up any contamination or ice.

Jaw Contacts
The blade-jaw contacts are silver-to-copper with silver contact buttons pressed into each blade. Jaw contact pressure is held constant by spherical bronze spring washers. The "split-tongue" design of the jaw contact centers the pressure directly over the contact area, providing excellent conductivity and prevents separation of the main contacts.

Hinge Contacts
The two blade members are attached to a wide hinge casting with contact pressure maintained with spherical bronze spring washers. The hinge contacts are silver-to-silver.

Terminals
The flat terminal pads have NEMA standard dimensions. Terminals can be supplied to fit any conductor requirements.

Insulators & Bases
NEMA Standard 3" BC station post insulators are furnished unless otherwise specified.

The standard base is fabricated from a structural Aluminum channel alloy 6061-T6. The base can also, according to customer's preference, be fabricated from structural steel channel, hot-dipped galvanized to ASTM specifications.