ALT115-S Littelfuse

Protection Relays Alternating Relays ALT SERIES 8-pin Plug-in Alternating Relay Description The ALT series alternating relays are used to alternate between two loads. The ALT is commonly used in duplex pumping applications to balance the runtime of both pumps. The ALT-S is used in single high-level float applications. When the float switch opens, the alternating relay changes state, forcing the other pump to run the next time the float closes. All ALT relays have a built-in debounce feature that prevents the relay from changing state if the switch or float contact bounces momentarily. The ALT-X has an internal cross-connected relay and is used in dual high-level float applications. These floats are commonly referred to as lead and lag floats. Wiring Diagram The pumps alternate as in the ALT-S version but the cross- connected relay configuration allows both pumps to run TYPICAL WIRING DIAGRAM FOR THE ALT-S simultaneously when both the lead and lag floats are closed. These relays are also available with a built-in switch (SW option) that is used to manually force one of the pumps to run every time the float switch is closed. This is helpful when a pump has been removed for repair or for test purposes. In the case of the ALT-X-SW, the switch essentially forces one pump to be the lead pump, while still allowing the second to run when both floats are closed. Must use the OT08PC socket for UL Rating *Note: Manufacturers recommended screw terminal torque for the OT series Octal Sockets is 12 in.-lbs. TYPICAL WIRING DIAGRAM FOR THE ALT-X (CROSS CONNECTED) ALTERNATING RELAY S1 F1 Features & Benefits L1 23 14 FEATURES BENEFITS F2 L2 85 S2 76 Prevents nuisance actuating causes by waves or F1 - F2: Debounce time delay 1-2A TYPICAL SIZE spashing in the tank FOR CONTACTOR COILS Built-in manual/ Force lead pump operation when a pump is auto switch removed for repair or testing (on select models) F3 L1 PUMP 1 Ordering Information F4 L2 F3 - F6: MODEL LINE VOLTAGE DESCRIPTION SIZE FOR INDIVIDUAL MAGNETIC CONTACTORS PUMP APPLICATION ALT024-S 20-26 V ac or V dc For single high-level float applications F5 L1 For single high-level float applications PUMP ALT024-S-SW 20-26 V ac or V dc F6 2 L2 with built in manual switch ALT115-S 95-125 V ac For single high-level float applications For single high-level float applications ALT115-S-SW 95-125 V ac with built in manual switch For dual high-level (lead and lag) float 95-125 V ac ALT115-X applications Accessories For dual high-level (lead and lag) float OT08PC Octal 8-pin Socket ALT115-X-SW 95-125 V ac applications with built in manual switch 8-pin 35 mm DIN rail or surface mount. Rated at ALT230-S 195-250 V ac For single high-level float applications 10 A 600 V ac. Surface mounted with two 6 For single high-level float applications screws or snaps onto a 35 mm DIN rail. ALT230-S-SW 195-250 V ac with built in manual switch For dual high-level (lead and lag) float 195-250 V ac ALT230-X applications For dual high-level (lead and lag) float ALT230-X-SW 195-250 V ac applications with built in manual switch ALT024-S and ALT024-S-SW are not UL Listed 2019 Littelfuse, Inc. Rev: 2-C-043019 wwwwwwwww.littelfuse.com/.littelfuse.com/.littelfuse.com/altProtection Relays Alternating Relays ALT SERIES General Characteristics Specifications Temperature Range -40 C to 50 C (-40 F to 122 F) Input Characteristics Maximum Input Power 5 W Supply Current 40 mA Safety Marks Functional Characteristics UL (OT08PC octal Debounce Time Delay 0.5 second socket required) UL 508 (File E68520) Control Input Impedance (min) CSA C22.2 No. 14 (File 46510) 24 10 k Dimensions (with socket) H 44.45 mm (1.75) W 60.33 mm (2.375) 115 56 k D 104.78 mm (4.125) 230 100 k Weight 0.38 lb. (6.08 oz., 172.67 g) Output Characteristics Mounting Method DIN rail or surface mount Output Contact Rating 480 VA 240 V ac (plug into OT08PC socket) Socket Available OT08PC (UL Rating 600 V) The 600 V socket can be surface mounted or installed on DIN rail. Disclaimer Notice Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/product-disclaimer. 2019 Littelfuse, Inc. Rev: 2-C-043019 wwwwwwwww.littelfuse.com/.littelfuse.com/.littelfuse.com/alt