Production equipment that has to run tomorrow morning. Drives that fault out mid-shift, MCC buckets nobody has opened in years, three-phase distribution that was extended four times without a drawing. Grasse Electric works the service and small-project side of light industry in Central Alberta, where downtime is the number that matters.
Light industrial here means the shops and small plants that make, process, package or handle something: fabrication and production floors, processing lines, material handling, compressed air and dust collection, and the three-phase distribution that feeds all of it. The people who call are maintenance leads, plant managers and owner-operators, and the call almost always comes because a machine is down and the shift is already running short.
The electrical picture in these buildings follows a pattern. There is original distribution from whenever the building went up, an MCC or a bank of disconnects, and then years of additions as equipment came and went. A drive was added here, a feeder was tapped there, a machine was moved across the floor and the old circuit was left live behind a panel. When something faults, the first job is not the repair, it is figuring out what the existing installation actually does.
Grasse Electric is a licensed, owner-operated electrical contractor working across Central Alberta since 2018. Todd Grasse is a Red Seal Journeyman Electrician, and the work covered here is light-industrial service, diagnosis and small project work rather than plant construction. Turnarounds, major shutdowns and large industrial construction projects need a crewed contractor and are outside this scope. What fits is the fault that has a line stopped, the machine that needs to be powered properly, and the distribution work that keeps both from repeating.
The failure modes that repeat on a production floor, and what is usually behind them.
Overcurrent, overvoltage, ground fault, undervoltage — the code on the keypad narrows it, but it does not finish the job. VFD fault diagnosis means checking incoming supply, DC bus, output balance, motor insulation and the mechanical load before anyone decides the drive is dead.
Voltage imbalance, a failing winding, a loose termination in the starter, or a load that has changed since the overload was sized. Measuring under load tells you which one, and stops the same motor coming out twice.
Old buckets, obsolete starters, contactors welded or chattering, and a cubicle that has been left alone because the line depends on it. These get worked with the line locked out and the sequence planned in advance.
Intermittent stops usually trace to a proximity or e-stop circuit, a loose field wire in a motion, or a drive that is cutting out on a transient. Chasing it with the line running is part of the job.
Control power, pressure switch and starter circuits fail more often than the motors do. Confirming control voltage and the starting sequence separates an electrical fault from a mechanical one quickly.
A used or imported machine arrives with a nameplate voltage that may or may not match the building. Sizing the feeder, disconnect and protection, and confirming rotation before start-up, is standard equipment and machine wiring.
Every spare breaker is used and the next machine has nowhere to land. That is a distribution question: available capacity, feeder sizing and whether a new sub-panel or splitter is the right answer.
No drawings, no directory, and no one left who installed it. Tracing circuits, identifying feeders and marking up what is actually there turns every future breakdown into a shorter one.
Machines rarely go back together exactly as they came apart. Broken field wiring, damaged flex, and interlocks landed on the wrong terminal show up on the first start attempt. Control wiring work sorts it out.
The gear that keeps a light-industrial floor running, and the parts of it that fail.
Fault diagnosis, replacement, parameter setup for the driven load, and power-side checks. Manufacturer experience includes drives such as Schneider Altivar, TECO and Lenze. Grasse Electric is an independent electrical service contractor, not an authorized distributor or factory service provider.
Buckets, across-the-line and reversing starters, overloads, contactors and control transformers.
Main and sub distribution, splitters, feeders, disconnects and equipment protection for added machines.
Drive motors, field devices, e-stop and pull-cord circuits, and the wiring that runs the length of the line.
Motor power, control circuits, pressure and level devices, and the interlocks between the collector and the equipment it serves.
High-bay LED over production areas, task lighting at machines, and receptacle and welding power where people actually work.
A breakdown call starts with questions that narrow the problem before anyone drives anywhere: what the machine was doing when it stopped, what the drive or starter is indicating, whether it has done this before, and whether anything changed on the line recently. That conversation often determines what comes on the truck.
On site the priority order is safety, then diagnosis, then repair. Isolation and lockout come first, and that is not negotiable on a floor with three-phase equipment. Diagnosis is done with instruments rather than parts swapping, because guessing at an industrial fault is expensive in both parts and downtime. Once the cause is confirmed, you get a plain description of what failed, what it will take, and whether there is a temporary measure that gets the line running while a part is on order.
Planned work runs differently. Machine power, distribution additions and lighting are scheduled into whatever window the plant has — between shifts, during a maintenance day, or on a weekend. After-hours attendance is available at an additional charge, with availability confirmed by phone. This is one electrician with service vehicles, a trailer and lift access, which fits service, machine power and small projects. Plant turnarounds and large industrial construction are not within scope, and neither is PLC software programming; field wiring, controls hardware and device-level work are.
Practical note: when a drive faults repeatedly and the replacement drive faults the same way, the drive is usually not the problem. Supply voltage imbalance, a degrading motor winding, a load that has stiffened up, or a cable run that is breaking down will all take out a second drive as fast as the first. Measuring before replacing is cheaper than replacing twice.
No. PLC software programming is outside the scope here. Field wiring, control panel and controls hardware work, device wiring, sensors, starters and drive setup for the driven load are all in scope, and that covers most of what stops a machine. If a job genuinely needs code changes, you will be told that up front rather than after the invoice.
No. Turnarounds and large industrial construction need a crewed contractor with the manpower to hit a compressed schedule. This is an owner-operated shop, so the fit is breakdown response, machine power, distribution work and small projects.
Usually either a like-for-like replacement if one can still be sourced, or a current-generation drive fitted and parameterized for the same motor and load. The second route often needs changes at the control terminals and a re-check of the start and stop logic. Either way you get the trade-offs before anything is ordered.
Some of it. Diagnosis of an intermittent fault often has to happen with the equipment operating, and testing is done accordingly. Any work on the equipment itself is done isolated and locked out. Where a shutdown is needed, it gets planned into a window rather than sprung on the floor.
It is common, and it is workable. It does mean the first visit spends time tracing and identifying rather than fixing. Marking up what is found as the work goes on costs very little and shortens every call after it.
That depends on what is already booked and where the site is. There is no guaranteed response time and no 24/7 line, and claiming otherwise would not be honest. Call and you will get a realistic answer on timing, including whether after-hours attendance is possible that day.
Tell us what the keypad says and what the machine was doing when it stopped.
