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SOLENOID

Electroswitch Control Switch Relays (CSR) combine the function of a
control switch with a remote controlled solenoid allowing one device to
do both the manual and supervisory control function in the control of
power circuit breakers. They eliminate the need to redesign substations
for redundant separate relays when manual substations convert to
supervisory control. CSRs provide manual or electric control switch
operation by supervisory control. The CSR looks, acts, and feels
identical to a control switch.

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.