Eaton’s Pringle bolted contact switch was the first in the industry and is a standard in high-current switching applications. They are custom-built, are used in many heavy-duty applications and are suitable for use in ULT 891 switchboards. 2. Switch blades (a) are closed over stationary contacts (e).
What is a pringle switch?
Eaton’s Pringle Bolted Pressure Contact Switches are available for switchboard applications, both new and existing. They open and close easily and conduct high current with greater efficiency than knife spring or butt contact devices. Switches are custom-built and used in many heavy-duty applications.
How does a Pringle switch work?
The switch features a quick-acting stored energy mechanism . The spring is compressed by the operating handle and released near the end of the stroke to provide quick, positive switching action independent of the speed with which the handle is operated .
Are bolted pressure switches 100% rated?
QA and CBC switches will carry 100% of rated current without exceeding 60 °C rise at terminals.
What is a high pressure contact switch?
The High Pressure Contact (HPC) switch has been demonstrated to be a superior switching device when compared to bolted pressure switches due to the exceptional contact design. The HPC switch is based on the time-proven platform of the Power Break* II circuit breaker.
How does a bolted pressure contact switch work?
These switches are called “bolted pressure” switches because an actual threaded shaft or “bolt” is rotated after the switch blades close. Rotating the bolt causes the switch blades to clamp under screw pressure to form a tight electrical connection.
What is a bolted pressure contact switch?
The bolted pressure contact switch uses bolts and/or cams to hold the contacts together under much more pressure than the old spring contact type switch. Tighter contact means less resistance to the current and reduced operating temperature under heavy loads.
What is a bolted pressure switch?
A bolted pressure switch is designed to shut off the power unit after the cycle is complete. The electrical circuit is broken when pressure is applied to the bolted pressure switch. Bolted pressure switches can be found in the switchboard.
