Electroswitch Control Switch Relays (CSR) combine the function of a The control of the CSR Control Switch Relay for electric operation requires no special wiring. It only requires two contacts (S1 and S2) to command the CSR to either the TRIP or CLOSE position. Low level contacts (rated 1 ampere) may be used since S1 and S2 do not control the rotary drive solenoid directly. The standard station control bus voltage is used on all three circuits. The device, when shown in the following figures is in the vertical NORMAL position. The CSR coil form shown on the figures represents the rotary solenoid that drives the CSR. Its operation is further described later. LS1 is a linear solenoid within the device that changes the sense of direction of the CSR from left (TRIP) to right (CLOSE). The contacts shown as CSR are contacts within the device. Other components are shown by conventional designations. Because of the nature of the operation of the rotary solenoid, the CSR does generate tran sients that may be of interest to the user. These transients are less than 2KV and generally in the 1.5KV to 1.8KV range. The military switches have enclosed decks and sturdy glass-alkyd moldings that provide insulated compartments that separate contacts. Standard double-wiping contacts reduce resistance. Stationary contacts can be non-shorting (break-before-make), shorting (make-before-break), or sweep style (connected to the rotor through consecutive positions). Rotor blades can be simple (for single-throw switching in one circuit and double-throw in another), right-angle (for double-throw switching and an intermediate Off position), or multi fingered (for double-throw, triple-throw, or four-throw switching). Spring-return models, muter-driven models, ganged switches, solenoid locks, tandem configurations, waterproof mounts, engraved nameplates, and a wide variety of handles are also available.
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