Despite popular opinion, our service engineers have a pretty interesting job. We service medium voltage VFDs for a variety of customers from Oil and Gas, Water/Wastewater, and heavy manufacturing all with their own unique challenges and tendencies. Because we are such a niche business, many people (including my wife) don’t know all that we do! I thought a quick snapshot of a typical week for one of our service engineers would give you better insight into of how well-rounded and amazing our service engineers are!
Monday: Meetings and Repairs
- Meeting: Go over priorities for the week and discuss ongoing jobs
- Siemens Power Cell Repair:
- Change capacitors, cell control board, and 1 suspect IGBT on a Gen 4 Power cell
- Test the cell on EMA’s load test stand
- Clean cell and complete paperwork for shipping
Tuesday – Wednesday: Refurbish, Wire, and Test a 2,500 HP Toshiba Medium Voltage VFD
- Remove all power cells to be tested separately on EMA’s load test stand
- Completely meg transformer at 5KV to verify transformer integrity
- Requires isolation of diodes by pulling fuses
- Body work repair
- Remove existing wiring and conduit penetrations
- Verify cables between switchgear and medium voltage VFD
Thursday – Saturday: Emergency Service Call
- Fly to Louisianna, arrive onsite in the afternoon to troubleshoot an Allen Bradley Powerflex 7000 intermittently failing on Motor Overload and Current Imbalance.
- Troubleshoot Drive
- Hall Effect Current Sensors (HECS) were determined to be bad and ordered.
- Work on paperwork and various customer meetings while awaiting parts to be delivered overnight.
- Replace new HECS and watch the unit run for several hours until customer is satisfied
- Fly back home
- Finish paperwork for job
- Prepare for startup next week in Oklahoma of a Toshiba T300MVi refurbished drive previously sold by EMA.
At EMA, we’re extremely proud of our well-rounded and “home grown” service engineers. “No One, ANYWHERE Is Better At Drives Than We Are” isn’t just a slogan, we really mean it! Our service department has a wealth of knowledge on a variety of Medium Voltage Variable Frequency Drives and the backing of a company with over 35 years of experience working on them.
Are you having a MV drive issue? Need advice on a medium voltage refurbished drive? Need a power cell repaired? Email us, Call us, or use the chat feature on our site. Let us prove to you that No One, ANYWHERE Is Better At Drives Than We Are!
2 Responses
How bout this one ?? …… I have a couple DC Reliance MaxPaks that are still in operation, up to lets say 75HP …… Are there any ole timers left that are knowledgeable with these ole relics ??
We do have old timers with the experience repairing MaxPak units.