High Voltage Switches-> Three Way Side Break Switches->

Copper 3AD

SilverTip® 3AD 3-way, copper side break switch

• Type: SilverTip® 3AD
• Orientation: Phase-over-phase mounting
• Ratings: 15kV through 161kV
• Ratings A: 600, 1200 and 2000 Amperes

Copper construction, field-proven performance and phase-over-phase designs.

Turner’s Type 3AD side break switch is well suited for phase-over-phase applications, phase-next-to-phase and triangular configurations on the transmission system. Unlike many so-called transmission-switching products that are merely substation switches modified for use on the transmission system, the Type 3AD is a true transmission switch. It is designed and built for the harsh environmental conditions, galloping conductors and constant pole movement inherent in severe aerial applications.

The 3AD switch’s unique frame design, with conductor dead-ends right to the frame, easily orients itself to the line angle. Additional positions can be added quickly and with minimal effort. Turner 3AD switches are available in mounting configurations for inline or 90 degree takeoffs. A rigid, hard-drawn copper blade with patented locking device, silver-to-copper contacts, double-spring arcing horns and sealed hinge contacts provide heavy-duty construction.

Turner Type 3AD switches can be used for station isolating and bypassing, distribution and transmission line sectionalizing or isolating arrestors, metering equipment and other apparatus. Right hand or left hand opening can be specified at time of order. They are easily upgraded for automatic operation and load breaking.

Secure Blade Closing

Turner Type 3AD switches firmly close into position, with the blade tip engaging the jaws with sufficient force to expand the contact jaws, preventing any blade bounce. Both the blade and jaw contacts are wiped clean during the closing action to ensure a low resistance current transfer. A heavy-duty blade-locking device keeps the blade closed despite temporary faults, surge currents, twist­ing structures or galloping conductors.

The lock is released during the switch opening sequence. This action, exclusive to Turner 3AD switches, breaks up any ice or contamination, and releases the contact friction, allowing the blade to easily be removed from the contacts.