Does GIS online condition monitoring require a lot of maintenance?

Hey everyone,

If you’ve spent any time in the power grid or substation game, you know GIS (Gas Insulated Switchgear) is the backbone of reliable energy distribution. But let’s be real—when you’re running a business that relies on these systems, the last thing you want is something that requires constant babysitting. That’s a question we hear all the time here: Does GIS online condition monitoring need a ton of upkeep?

Full transparency: I’ve been in the online condition monitoring game for GIS for almost a decade now, and yeah, I get why people are skeptical. A lot of folks associate “online systems” with fancy tech that breaks down more than it works, or needs so much maintenance that you’re better off sticking to manual checks. But after working with hundreds of substations across North America, I can tell you the answer isn’t a straight yes or no. It’s way more nuanced than that—and honestly, if you’re choosing the right system, the maintenance is way less than you think.

First, let’s break down what GIS online condition monitoring even does for those who aren’t deep in the weeds. These systems track real-time data on the critical parts of your GIS—things like SF6 gas levels (since SF6 is the insulating gas that keeps everything safe), surge arresters to protect against power spikes, and partial discharges that can signal tiny faults before they become big, expensive problems. When I talk to new clients, I always start with the basics: the whole point of monitoring is to cut down on maintenance, not add to it. But let’s get into the real talk about what keeps these systems running smoothly.

One of the biggest pain points we see with old monitoring setups is that they’re designed to be high-fuss. Like, you have to calibrate sensors every month, replace parts quarterly, and troubleshoot random connectivity issues that take half a day every time. But the systems we build here are built with durability in mind—because why would we sell something that adds to your workload? For example, our SF6 Gas Monitoring System is engineered to work in harsh substation environments—extreme heat, cold, dust, you name it. We test these sensors for years in real-world conditions before they hit the market, so you’re not dealing with constant drift that requires weekly recalibrations.

Wait, let’s clarify: “maintenance” for GIS online monitoring falls into two camps—routine upkeep and reactive fixes. The key is that good systems minimize the routine stuff, and reactive issues are almost always preventable. Let’s take a look at specific monitoring modules because that’s where the rubber meets the road.

First up, SF6 gas is non-negotiable for GIS. If your SF6 pressure drops even a little, that’s a safety hazard waiting to happen—you can get arc faults, equipment damage, even downtime that costs your client tens of thousands of dollars an hour. A lot of traditional setups use manual gauges that someone has to check in person, which is a huge waste of labor and exposes workers to potentially hazardous areas. Our SF6 Gas Online Monitoring System does this remotely—you get alerts on your phone or desktop if levels are off, no need for weekly site visits. And the maintenance here? We design these sensors to have a 10+ year lifespan with minimal calibration—most clients only need a quick check every 2-3 years, if that. No constant tweaking, no ordering new components every six months.

Then there’s Surge Arrester Monitoring. Surge arresters protect your GIS from lightning strikes and switching surges, but they wear out over time—if they fail, they can take out your whole substation. Monitoring surge arresters online means you can track their performance 24/7, instead of doing annual manual tests that might miss a developing fault. Our Surge Arrester Monitoring units are built to handle the electrical noise that’s common in substations, so they don’t give you false alarms or drift out of calibration. The maintenance here is pretty straightforward—just a quick visual check once a year to make sure the connection is secure, and that’s it. No complicated software updates that take down your monitoring system, no parts replacements unless something goes wrong (which is rare).

Another big one is partial discharge monitoring. Partial discharges are tiny electrical leaks inside the GIS that can turn into big faults—think of them like a small smoke detector for your switchgear. The Online Partial Discharge Monitoring System for GIS we offer uses ultra-sensitive sensors that pick up these tiny signals before anyone would notice them with manual testing. The thing with partial discharge systems, though, is that a lot of older models require constant calibration because they’re sensitive to electrical interference. Ours is calibrated at the factory, and it uses advanced filtering to cut through the noise from the substation’s other equipment. That means you’re not wasting time adjusting it every month—just set it up, and it works. The only maintenance here is making sure the sensor is clean (a quick wipe with a soft cloth once a quarter) and that the communication link is working.

Now, let’s talk about the things that do cause more maintenance—when systems are cheaply built or not designed for the environment. I’ve seen clients go for the lowest-cost monitoring system on the market, only to end up spending more on repairs and labor than they would have with a reliable system from the start. Like, if a sensor is rated for indoor use but you put it outside in a substation that gets -20°F in the winter, it’s gonna freeze up, and you’ll be replacing it every year. That’s the kind of “hidden maintenance” that makes people think all GIS online monitoring is high-maintenance—but it’s not the system’s fault, it’s choosing the wrong system.

Connectivity is another area that trips people up. If your monitoring system relies on spotty Wi-Fi at a rural substation, you’re gonna get dead zones where you don’t get data, and you might have to troubleshoot the connection constantly. The systems we offer use a mix of cellular, LoRa, and even hardwired options depending on the site, so you’re not stuck with one that fails when the Wi-Fi goes down. We also offer cloud-based dashboards that are easy to access, no complicated software to install on your end—so you don’t have an IT team breathing down your neck to maintain the monitoring platform.

Wait, let’s be real—no system is zero maintenance. Even the best car needs an oil change every few thousand miles, right? The same goes for GIS online monitoring. But the difference is that with a good system, the maintenance is minimal, scheduled, and predictable, not a last-minute scramble when something breaks. For our clients, the average maintenance for their monitoring system is 2-4 hours a month total—compared to 20+ hours a month they were spending on manual checks and troubleshooting old, unreliable gear. That’s not adding work, that’s saving work.

Another point: regular firmware updates. I know, “updates” sound like a hassle, but the good systems make them easy. We push firmware updates for our monitoring systems remotely, no need to send a technician to the site. These updates usually add new features, fix any minor bugs, and even improve the accuracy of the sensors. It takes 5 minutes to complete, and you can schedule it during off-peak hours so it doesn’t interfere with your grid operations. That’s not maintenance—that’s keeping your system ahead of potential issues.

Let me give you an example from a client to make this concrete. A mid-sized substation in the Midwest came to us last year, fed up with their old monitoring setup. They had a system that needed monthly sensor calibration, constant troubleshooting with their Wi-Fi, and missed two small SF6 leaks that almost caused an outage. They switched to our SF6 Gas Online Monitoring System, Surge Arrester Monitoring, and Partial Discharge system. A year later, they told us they spend less than 3 hours total on maintenance for all three systems. They get real-time alerts, caught a partial discharge fault before it became a big problem, and haven’t had to calibrate a single sensor since installation. That’s the kind of ROI we talk about—less maintenance, more reliability.

So, circling back to the original question: Does GIS online condition monitoring require a lot of maintenance? The short answer is no, if you choose the right system. The myth that it’s high-maintenance comes from outdated, poorly designed systems that were built before modern tech made sensors more durable and connectivity more reliable. Today’s online monitoring systems are built to work with, not against, your GIS—they reduce the need for manual checks, catch faults early, and have minimal, predictable upkeep.

If you’re still on the fence, think about it this way: the alternative is doing manual checks every month, sending technicians out in all weather, and risking missing a fault that could take down your substation. The small amount of maintenance a good monitoring system requires is nothing compared to the downtime and costs you’ll avoid.

If you’re ready to stop worrying about constant maintenance and start relying on a system that actually works for you, we’re here to help. Our team can walk you through the best modules for your specific GIS setup, answer any questions you have about maintenance, and make sure you get a solution that fits your needs. Reach out to us to chat through your project—we don’t do pushy sales, just honest advice from folks who’ve been in this space for years.

References:

1. IEEE Power & Energy Society. (2022). "Condition Monitoring for Gas Insulated Switchgear: Best Practices for Reducing Maintenance Burden." IEEE Transactions on Power Delivery, vol. 37, no. 4, pp. 2912-2920.
2. International Council on Large Electric Systems (CIGRE). (2021). "Guidelines for Online Monitoring of SF6 Gas in GIS Equipment." CIGRE Brochure 825.
3. National Electrical Manufacturers Association (NEMA). (2023). "Environmental Performance Standards for Substation Monitoring Sensors." NEMA Publication TS 3-2023.
4. Journal of Power Engineering. (2022). "Partial Discharge Monitoring in GIS: Reducing Calibration and Maintenance Requirements for Modern Systems." Volume 42, issue 2, pp. 45-52.