What do SPST, SPDT, DPST, and DPDT mean?

What do SPST, SPDT, DPST, and DPDT mean?

What do SPST, SPDT, DPST, and DPDT mean? SP and DP refer to single pole and double pole, ST and DT refer to single throw and double throw. Pole refers to the number of circuits controlled by the switch: SP switches control only one electrical circuit.

What do SP, DP, St and DT mean?

SP and DP refer to single pole and double pole, ST and DT refer to single throw and double throw. Pole refers to the number of circuits controlled by the switch: SP switches control only one electrical circuit.

What happens when the SPST switch is not actuated?

When the switch is actuated, the circuit is closed (or made) and current flows from the common terminal through to the normally open terminal. When the SPST mechanical switch is not actuated, the circuit is not closed, rather it is an open circuit (not made).

What does SPDT stand for in Circuit category?

So lets look at each circuit style and better understand the mechanics of the switch and the best applied application for each circuit. One of the most common style of switches is the SPDT Mechanical switch. The SPDT stands for Single Pole, Double Throw.

What is the difference between a DP and a SP switch?

SP and DP refer to single pole and double pole, ST and DT refer to single throw and double throw. Pole refers to the number of circuits controlled by the switch: SP switches control only one electrical circuit. DP switches control two independent circuits (and act like two identical switches that are mechanically linked).

How is the rating of a permanent disability determined?

The calculation of a permanent disability rating is initially based on a evaluating physician’s impairment rating, in accordance with the medical evaluation protocols and rating Initial impairment ratings are consolidated by body part (see Adjusting AMA Impairments and Combining Ratings