Barrel Heaters - Hasmak.com.tr

Power ControllersProblem SolversWatlow Solutions To CommonPower Controller ProblemsPower controller replacement intervalscan be lengthened or problemseliminated by using the optimum powercontroller for the application. Check thelist below to see if Watlow powercontrollers can improve your process.ProblemPremature heater failureExcessive contactor failureWasted powerUnsafe panel wiringEnvironmental concerns aboutMDRsExcessive EMI causingproblems in control circuitsPower Control Solution• Stabilize heater element temperature and reduce thermal stress by usinga solid state power control along with a PID temperature controller toreduce the temperature control cycle time• Replace electromechanical contactors with solid state relays.Use E-SAFE ® RELAY for long cycle times, solid state relays for short cycletimes and PID control• Reduce temperature overshoot and power consumption by smoothing outtemperature/heating cycles with solid state power control and PIDtemperature control• The DIN-A-MITE ® power controllers, when properly wired are totally safefrom finger and palm electrical shock• Replace with solid state power controller or E-SAFE RELAY.The DIN-A-MITE has the same footprint as many MDRs• Correct wire routing for minimum EMI pick-up; change fromelectromechanical and mercury relays, and/or phase-angle fired solidstate devices to zero cross (burst firing) solid state power controlCase HistoryE-SAFE ® RELAY DeliversLower Costs and IncreasedProductivityProblem:A plastics molder utilizedmechanical relays (contactors) inthe power control circuits of their100-ton injection molding machine.The relays had to be replaced every250,000 cycles and each changerequired a two hour shutdown of theproduction line. The manufactureralso had to dispose of theenvironmentally hazardous mercuryfrom the failed contactors.202Solution:To avoid these frequent shutdowns,Watlow E-SAFE RELAYs wereinstalled. E-SAFE RELAYs werepriced lower than the contactors,while also offering longer life.The E-SAFE RELAY provided highperformance in a non-mercuryoffering and eliminated the toxicwaste from failed mercurycontactors.After millions of cycles of operation,the customer informed Watlow thatthe E-SAFE RELAYs were stillperforming like new and had savedthem thousands of dollars inreplacement costs. In addition, hadthey continued to use the contactors,they would have experienced 24production shutdowns and 48 hoursof lost production time.