PLS Series - Voltage Monitor

Littelfuse Voltage Monitoring Relays
The PLS Series is a low cost phase sensitive control that provides an isolated contact closure when the proper A-B-C phase sequence is applied. Protects sensitive 3-phase equipment and equipment operators from reverse rotation. Designed to be compatible with motor overloads or other 3-phase equipment protection devices. Protection for equipment control centers where frequent reconnection or electrical code makes reverse rotation protection essential. Examples include: mobile refrigerated containers, construction equipment, hoists, pumps, conveyors, elevators and escalators.


Operation
The internal relay and LED are energized when the phase sequence is correct. The output relay will not energize if the phases are reversed. Reset is automatic upon correction of the fault.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Output
Form
Termination TypeMounting MethodDimensionsWeight (lbs/g)Compare
PLS120A95 to 135VACIsolated SPDTOctal 8-pin plug-inPlug-in socket3.20 x 2.39 x 1.78 in. (81.3 x 60.7 x 45.2mm)≅6.0oz (170g)
PLS240A175 to 255VACIsolated SPDTOctal 8-pin plug-inPlug-in socket3.20 x 2.39 x 1.78 in. (81.3 x 60.7 x 45.2mm)≅6.0oz (170g)
PLS480A380 to 500VACIsolated SPDTOctal 8-pin plug-inPlug-in socket3.20 x 2.39 x 1.78 in. (81.3 x 60.7 x 45.2mm)≅6.0oz (170g)