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Do you have a unique application? Are you looking for new equipment or spare parts? Do you require technical support?
Visit our new website for all of your power supply needs!
Please contact us to learn more by calling (239)-275-5877 or emailing email@example.com.
Stay tuned for some of our upcoming webinars.
- Basics of Phase Control: How Rectifiers Work
- How to Make Sure Your Rectifier is Calibrated
- Basic SCR Preventative Maintenance
What other topics do you want us to cover? Email our team!
- Have the correct tools and know how (training).
- How long has the rectifier been out of service?
- Was the rectifier in storage, covered, locked out, serviced or moved?
- Make a checklist as you go and document observations.
- Make sure you inspect all rectifiers. Check for out of the way locations.
- Keep a list of all rectifiers and their present status.
- Check variables for specialized equipment.
- Repair and record findings.
- Look for items in close proximity. Keep 36” clearance around rectifiers. Check for trip hazards in the area.
- Communicate the startup to affected people in the area, including other shifts.
- Review the maintenance logs.
- Has work been done on the rectifier during the shutdown? Has the service been completed? Is there still work to address prior to startup?
- Look for signs of repair/maintenance you did not know about.
- Consult user manual for specific startup process.
- Review SOP (Standard Operating Procedure) for startup sequencing. Startup line operations in correct order.
- Address any issues seen, review troubleshooting charts.
- Post start up. Log all maintenance items addressed.
- Review spare parts inventory.
- Review and re-set PM schedule.
- Monitor rectifiers during initial production.
- Use proper PPE.
- Contact APP for assistance if needed.
- Inspect controls, verify that gauges and potentiometers are not damaged.
- Look over all control wiring terminations for loose or frayed wring.
- Verify communication with automation system.
- Test controls, use a dummy load if possible prior to running product.
- Be sure voltage and current control is achieved.
- For advanced checks you can use an oscilloscope to verify proper output wave shape.
- Document training related to the rectifiers, IE, LOTO and electrical safety.
- Before powering up, check input cabling and power distribution for correct torque.
- Heating and cooling can cause loose connections.
- Check incoming line voltage and current. Each input phase should be equal.
- Make sure all enclosure panels are in place and closed.
- Be sure proper procedures have been followed. IE: Lockout removal.
- Proceed with energizing the equipment in standby mode (Not producing output yet).
- Make sure there are no fault indications or other areas of concern.
- Check that the DC buss connections are tight.
- Check that there is nothing leaning on or shorting the output buss bars.
- Use thermal imaging to verify expected temperature and possibly locate items of concern that may not been seen unless under load.
- For air cooled units, check that air is readily available. For forced air ventilation, check for obstructions.
- If equipped, check that air filters are clean and in place.
- For water cooled units, confirm chiller settings.
- Pre-start pumps, open bypass / recirculation valves.
- Check for leaks. Was rectifier stored in freezing temps?
- Circulate water through rectifier to be sure all cooling lines are flowing freely.
- Re-check that cooling media is running and effective.