If you’ve been in the industrial power game for more than a minute, you’ve probably worked with MNS low voltage switchgear. It’s the workhorse of factories, warehouses, data centers, and commercial buildings—something most people don’t think about until it stops working. But let’s be real, those older control systems in MNS gear? They’re often the first thing to go when your operation starts scaling up or your energy needs get more complex. I’m on the supplier side of MNS switchgear, so I see this all the time. Last quarter alone, we got 17 calls from plant managers whose 10+ year old MNS panels were throwing random error codes, struggling with power fluctuations, and not playing nice with their new smart building tools. Upgrading the control system isn’t just a band-aid—it’s how you keep your operation running without dropping cash on a full panel replacement (which is way more expensive, by the way). Let’s break down how to do this the right way, no overly technical jargon, just real stuff I’ve picked up working with hundreds of facilities. MNS Low Voltage Switchgear
First off, why even bother upgrading? I think a lot of plant guys default to “if it ain’t broke, don’t fix it” but that logic dies fast when your old control system starts causing actual problems. Take Sarah, a facility manager at a 24/7 food processing plant we worked with last year. Her 12-year-old MNS control system was analog, so she had someone manually checking breaker status three times a shift. One night, a minor overload tripped a breaker, and no one noticed until the production line went dark—cost her around $80k in spoiled food and downtime. The upgraded control system we put in? It sends real-time alerts to her phone, so she fixed that same issue before it even affected production. Another big one: energy efficiency. Old control systems are way less precise, so they waste a ton of power on things like idle circuits or overcharging batteries. We calculate that most MNS gear from before 2018 can cut energy use by 12-18% just with a control upgrade—money that goes straight to your bottom line, not your utility bill. Also, compatibility with new tech. If you’re adding a solar array, a battery energy storage system (BESS), or a IoT-enabled monitoring system, your old control system probably can’t talk to it. Upgrading lets you tie all that gear together, so you’re not running disconnected silos of equipment.
Now, let’s get into the actual process, because upgrading an MNS control system isn’t just popping in a new screen and calling it done. You have to do it right, especially since MNS is modular—you can’t just yank the control part out of the panel without making sure everything fits. First step: do a full audit of your existing system. I know, audits sound boring, but skip this and you’ll have a messy upgrade. We send our techs out to every job first to check three things: the age of your MNS frame, the type of existing control components, your load profile, and any future plans you have (like adding new machinery in the next 3 years). For example, if you’ve got a 2015 MNS panel, the frame is still solid—those were built to last. But if it’s a 2009 model, the control bus bar might not support the higher data transfer rates modern systems use. During the audit, we also check for wear and tear on old parts: cracked circuit board traces, loose wiring, outdated relays that can’t handle fast switching. One client had a control relay that was so corroded, it would randomly flip breakers—we caught that during the audit before we even ordered parts for the upgrade. Pro tip from our team: bring in a specialist who actually knows MNS, not just generic low voltage gear. A lot of electricians can swap a breaker, but MNS has specific modular slots, so misplacing a control module can cause a whole panel outage.
Next, pick the right control upgrade components. This is where a lot of people go wrong—they buy the cheapest stuff online and end up with something that doesn’t integrate. Let’s keep it simple: modern MNS control upgrades fall into two main categories, depending on your needs. If you want a basic upgrade for older panels that just need reliable monitoring and basic controls, go for a retrofittable PLC (programmable logic controller) module that fits right into the existing MNS slots. These are plug-and-play for most post-2010 MNS frames, so you don’t have to rewire the whole panel. They handle things like breaker status, overload protection, and simple energy logging. If you need more—like IoT connectivity, dynamic load balancing, or support for renewable energy—go for a smart HMI (human-machine interface) paired with a modular control bus. The bus syncs all the control components, so you can monitor every circuit in real time from your phone or desktop. Don’t sleep on the power supply either. Old control systems run on 24V DC that’s often underrated. If you’re upgrading to a smarter system, you’ll need a robust, redundant power supply so if one fails, the other kicks in without a blackout. We always recommend split power supplies for upgrades now—they’re not that much more expensive, and they prevent a lot of mid-shift panic.
Then comes the installation part. This is make-or-break. A bad installation will make even the best control upgrade fail. First, schedule it during a planned outage, never a live production shift. That’s non-negotiable. We usually work with our clients to pick a 8-12 hour window on a weekend or holiday where production is paused, so we don’t cause downtime. The process for MNS is different from a full panel replacement, too: we first lock out and tag out the old control system to make sure no power is flowing. Then we remove the old control modules, clean the slot contacts (dust and corrosion are big killers here), and slide the new modules in. The key part here is calibration. Modern control systems communicate via Ethernet or fieldbus protocols, not the old analog wires. Our techs test every connection to make sure data is flowing between the HMI, PLC, and every circuit breaker. We also do a load test after installation: we crank up 110% of your normal operating load to make sure the new control system handles it without tripping or lagging. One thing we always tell clients: don’t let a random electrician do this. MNS control systems have specific EMC (electromagnetic compatibility) requirements, so they don’t interfere with other equipment like nearby variable frequency drives (VFDs). Our team has worked on hundreds of MNS upgrades, so we know how to route wires to avoid signal interference, which is a common mistake that causes random error codes.
Once it’s installed, you can’t just walk away. Training and post-install support are just as important as the upgrade itself. We’ve had clients drop thousands on new control systems because their operators didn’t know how to use the new HMI, so they went back to manual checks like before. We do on-site training for all operators and maintenance techs—usually 2 hours, tailored to their skill level. For example, factory floor operators might only need to know how to read alerts and reset breakers, while maintenance techs learn how to adjust load settings and run diagnostics. We also give clients access to our 24/7 support line, because even after a successful install, you might have a question at 2 a.m. when the system throws a weird alert. We’ve had clients call us at 1 a.m. when an alert popped up for a minor overload, and we walked them through fixing it in 5 minutes, no need for a tech to drive out.
Wait, let’s address some common myths I hear all the time. Myth #1: “Upgrading the control system is too expensive.” Yeah, it’s not free, but let’s do the math. A full MNS panel replacement is usually 3-5x more expensive than a control upgrade. And we just mentioned energy savings of 12-18%—for a 1MW facility, that’s $15k-$22k a year in utility savings. On top of that, less downtime: the average unplanned industrial downtime costs $100k+ per hour, so avoiding even one outage pays for the upgrade multiple times over. Myth #2: “My MNS panel is too old to upgrade.” We’ve done controls on MNS panels from the early 2000s—some older, even. The only time you can’t upgrade is if the panel frame is rusted or structurally damaged, which we check in the audit. Myth #3: “It will take too long.” Most MNS control upgrades take 8-16 hours, which is way less time than a full panel replacement that often takes days of production downtime.
Now, let’s talk about when to upgrade versus when to replace. I get asked this all the time. If your MNS panel is less than 15 years old, the frame is in good shape, and you just need better monitoring or compatibility with new gear—upgrade the control system. If your panel is over 20 years old, has structural damage, or you’re expanding your load by 50%+—then a full panel replacement makes more sense. But for most facilities, upgrading the control system is the smarter, cheaper, faster move.
At the end of the day, the goal of upgrading your MNS control system isn’t just to have fancier tech. It’s to make your operation more reliable, more efficient, and easier to manage without breaking the bank. I’ve worked with too many facilities that put this off until something went wrong, and it ended up costing them way more than a proactive upgrade would have. If you’re noticing your old control system throwing random errors, struggling with power fluctuations, or not playing nice with your new smart tools, it’s time to stop putting it off.
If you’re ready to stop dealing with unreliable control systems and start making your MNS gear work for you, reach out to us to talk through your specific needs. We’ll send a tech out to do a free audit, no strings attached, and give you a clear, honest plan for upgrading your control system that fits your budget and timeline. Let’s get your operation running smoother, safer, and more efficient—no hidden fees, no confusing jargon, just real solutions for real industrial needs.
Soft Starter References
Low Voltage Switchgear Application and Design, 2nd Edition
International Electrotechnical Commission (IEC) 61439: Low-voltage switchgear and controlgear assemblies
Industrial Power Monitoring and Control Systems: Best Practices for Modern Facilities
Nanjing Aubo Electric Co., Ltd.
Nanjing Aubo Electric Co., Ltd. is one of the most reliable mns low voltage switchgear manufacturers and suppliers in China. Welcome to wholesale high quality mns low voltage switchgear made in China here from our factory. For more cheap products, contact us now.
Address: No.15, Zhufeng Road , Zhuzhen Town Luhe District, Nanjing, Jiangsu
E-mail: aubochina@aubochina.com
WebSite: https://www.vfd-softstarter.com/
