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50R-400-ALT

50R-400-ALT
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Alternating Relays 480 V ac application, panel mount ®C€ Description The 50R-400-ALT alternating relays are used to alternate between two loads, most commonly in duplex pumping and compressor applications to balance the runtime of both loads. When used in single float applications, the alternating relay changes state after the float switch opens*, forcing the other pump to run the next time the float closes. When used in dual float applications, the alternating relay will allow both pumps to run simultaneously when the lead and lag floats are both closed. An adjustment knob provides the option to force one pump to run every time the float switch is closed. This is helpful when one pump has been removed for repair or for test purposes. A built-in debounce feature prevents the alternating relay from changing state if the float contact bounces momentarily. *The alternating relay will not switch states while current is flowing. Switching will only occur after current has been sensed, followed by loss of current for the duration of the debounce time delay. Features & Benefits BENEFITS Prevents rapid cycling caused by waves or splashing in the tank Visual indication of load operation in duplex application Built-in manual switch Helpful to control load operation when to force load operation performing periodic maintenance or pump repair Operates from No transformer required to provide 120-240 V for Specifications Input Characteristics Supply Voltage 380-480 V ac Functional Characteristics Control Input Impedance (min) 1 MO Output Characteristics Output Contact Rating Pilot Duty General Purpose Debounce Time Delay General Characteristics Maximum Input Power Terminal Torque Wire Size Safety Marks Dimensions Weight Mounting Method

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50R-400-ALT
1Pages

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50R-400-ALT 1Pages

Catalog excerpts

All Littelfuse catalogs and technical brochures

Archived catalogs

50R-400-ALT
1Pages