Eaton CurrentWatch ECSTD Series Instruction Leaflet

IntroductionThe CurrentWatch™ ECSTDSeries are a family of highperformance current-operatedswitches with field-adjustabletime delay to help minimizenuisance trips during start-upand operation. Designed formotor status applications wheresetpoint accuracy and repeatability are critical, the ECSTD Seriesoffers a linear setpoint characteristic and constant hysteresis.Standard features include self-powering, jumper-selectable rangesand a choice of outputs and housing styles cases. Models are avail-able which provide N.O. or N.C. AC contacts or solid-state N.O.or N.C. “universal” contact outputs which can switch AC or DC.Contact action can be delayed for up to 15 seconds by using theTime Delay Adjust potentiometer.Eaton’s current sensor family encompasses a broad range ofproducts for cost-effective monitoring, status, and predictive main-tenance. Downtime and costly repairs can be avoided by utilizingEaton’s products and technologies in your control systems.InstallationConsiderations for all ECSTD Series models…• Run wire to be monitored through the aperture (opening) in theswitch body.• These switches can be located in the same environment asmotors, contactors, heaters, pull-boxes and other electrical enclo-sures.• Mounting can be done in any position or hung directly on a wirewith a wire tie.• Be sure to leave at least 1.0 in. (25.4 mm) distance between sen-sor and other magnetic devices.Considerations for split-core models only…• Press the tab in the direction shown below to open the sensor.• After placing the wire in the aperture, press the hinged portionfirmly downward until a click is heard and the tab pops out fully.• Keep split-core contact areas clean. Silicon grease is factoryapplied on the mating surfaces to prevent rust and improve per-formance. Be careful not to allow grit or dirt into the grease inthe contact area, particularly on core mating surfaces of split coremodels. Sensor operation could be impaired if mating surfaces donot have good contact. Check visually before closing.To open:Press tab inwardtowards hingeImportant:Keep contact areas cleanQuick Install GuideThe below steps can be followed to quickly install a CurrentWatchECSTD Series switch.1. Run the wire to be monitored through the aperture.2. Mount the sensor.3. Connect output wiring.a. Use up to 14 AWG copper wires,b. Ensure load matches the output shown on the switch label.4. Adjust the setpoint:a. Choose correct range by positioning the range jumper(removed for low, across two appropriate pins for medi-um, or high),b. Use the potentiometer to adjust the setpoint.Setpoint AdjustmentThe CurrentWatch ECSTD Series setpoint and time delay are adjust-ed through two four-turn pots (on split-core models) and 15-turn pots(on solid-core models). The unit comes from the factory with set-point and time delay set to the lowest level (fully counter-clockwise).Turning the pots clockwise will increase their value. All pots havea slip-clutch to prevent damage at either end of their rotation. Todetermine where the adjustment is, turn the pot all the way counter-clockwise. This will return it to the minimum setpoint.Important Setpoint Adjustment Notes• Output contacts are solid-state. Check output status by applyingthe appropriate voltage to the contacts and reading the voltagedrop across the contacts. An Ohmmeter set on “continuity” willgive misleading results.• It is recommended the setpoint be adjusted to allow for the usualutility company voltage variations of 10 to 15 percent.Typical Adjustment Steps1. Identify expected Input Range and position jumper accordingly.For LOW range, remove jumper entirely. For MID or HIGH range,place jumper over proper two pins.2. Turn the setpoint pot to the minimum value (four turns for split-core models and fifteen turns for solid-core models).3. Have normal operating current running through the switch. Theoutput should be tripped because the pot is at its minimum set-point. For units with LED, it should be flashing fast (two to threetimes per second).4. Turn the pot clockwise until the unit un-trips. This is indicated bythe slow flashing of the LED (once every two to three seconds),or by the changing of the output switch status.5. Now turn the pot counter-clockwise slowly until the unit tripsagain.a. To set underload, turn the pot about 1/8 turn furthercounter-clockwise.b. To set overload, turn the pot about 1/8 turn furtherclockwise.6. Adjust the time delay of the contact action in the same fashion.Increase time delay by turning the pot clockwise. For split-coremodels, each quarter-turn corresponds roughly to one second ofdelay time. Expect ten turns for a 15 second delay.2EATON www.eaton.comCurrentWatch™ ECSTD SeriesAC Current Switches with Time DelayInstructions Publication P51921Effective July 2017

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