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Johnson Controls R310A Current Sensing Switch

Current Sensing Switch

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.

• small size allows mounting in small enclosure
• solid-state switching contains no moving parts to fail
• low 0.5 ampere activation allows monitoring of most small equipment circuit loads
• high 200 ampere monitoring capacity allows monitoring of heavy duty equipment
• large 0.70 in. (18 mm) diameter sensor hole accepts large diameter wire sizes and multiple coilings of smaller diameter wire sizes

Select a link under the "item" tab below to order.

Cat #Descriptions
R310AD-1CCurrent Sensing Switch Voltage Switching Capacity: 0-30 VAC Used With: P445 Electronic Lube Oil Control
R310AE-2CCurrent Sensing Switch Voltage Switching Capacity: 120-240 VAC Used With: P28 and P45 Electromechanical Lube Oil Controls
Switch Action SPST, Normally Open
Current Sensing Range R310AD-1C 0.5-200 Amperes
R310AE-2C 0.75-200 Amperes
Switch Threshold R310AD-1C 0.5 Amperes
R310AE-2C 0.75 Amperes
Sensor Supply Voltage Induced from monitored conductor
Isolation 000 VAC RMS
Switching Capacity General Purpose
Load: R310AD-1C 0.1A @ 30 VAC/DC
R310AE-2C 0.5A @ 250 VAC/DC
Output Polarity Non-polarity Sensitive Output
Enclosure Nema1
Ambient Operating Conditions 5 to 140°F (-15 to 60°C)
0-95% RH, Non-condensing
Dimensions (H X W X D) 2.34 X 1.86 X 0.875 in.
Sensor Hole Size 0.70 in Diameter
Agency Listings UL Guide NRNT
cUL Guide NRNT7

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