The R310A Series Current Sensing Switch
detects alternating current (AC) flow in a single
circuit without being connected to that circuit.
It may be used in any application where
current detection is required.
The R310A replaces the R10A used with
Johnson Controls/PENN time delay oil failure
cutout controls such as the P28, P45, and
P445. These applications incorporate internal
line breaking overload protection, where
lockout due to overload cycling is
unacceptable or undesirable. The
R310A switch is not intended to detect
breakage of belts.
The R310A is molded in a high dielectric
material, which permits mounting inside a
starter or contactor.
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