A 3 phase oil-immersed voltage stabilizer is a type of heavy-duty power conditioner that helps make sure the three-phase AC power your equipment needs is always right on target.
The good stuff – in the form of regulating components – is all wrapped up inside a tank of insulating oil. Not only does that oil help keep the electrical innards from getting too hot – it also fights off moisture, corrosion and the wear and tear that can come from dust and grime.
As you might expect, this sort of setup is a real winner for places that need a lot of power, or where the air is thick with dust and the equipment has to run 24/7 without a break. Keep in mind though – this is not a UPS, and its job is not to keep the lights on during a power outage (that’s what an uninterruptible power supply is for). Its main gig is just keeping the power stable and running in the first place.
| Model | Rated Capacity (kVA) | Input Voltage | Output Voltage | Overall Dimensions (mm) | Weight (kg) |
| ZFLS-100 | 100 | 323–456 V | 380 V | 700 × 700 × 1350 | 450 |
| ZFLS-150 | 150 | 323–456 V | 380 V | 750 × 750 × 1350 | 550 |
| ZFLS-200 | 200 | 323–456 V | 380 V | 750 × 750 × 1350 | 750 |
| ZFLS-250 | 250 | 323–456 V | 380 V | 750 × 750 × 1350 | 850 |
| ZFLS-300 | 300 | 323–456 V | 380 V | 1000 × 1000 × 1700 | 1100 |
| ZFLS-350 | 350 | 323–456 V | 380 V | 1000 × 1000 × 1700 | 1150 |
| ZFLS-400 | 400 | 323–456 V | 380 V | 1000 × 1000 × 1700 | 1200 |
| ZFLS-500 | 500 | 323–456 V | 380 V | 1100 × 1100 × 1700 | 1250 |
| ZFLS-600 | 600 | 323–456 V | 380 V | 1200 × 1200 × 1700 | 1400 |
| ZFLS-800 | 800 | 323–456 V | 380 V | 1100 × 1100 × 2000 | 1800 |
| ZFLS-1000 | 1000 | 323–456 V | 380 V | 1100 × 1100 × 2000 | 1900 |
| ZFLS-1250 | 1250 | 323–456 V | 380 V | 1200 × 1200 × 2000 | 2000 |
| ZFLS-1600 | 1600 | 323–456 V | 380 V | 1300 × 1300 × 2000 | 2500 |
| ZFLS-2000 | 2000 | 323–456 V | 380 V | 1550 × 1550 × 2300 | 4000 |
| ZFLS-2500 | 2500 | 323–456 V | 380 V | 1600 × 1600 × 2300 | 5000 |
| ZFLS-3000 | 3000 | 323–456 V | 380 V | 1700 × 1700 × 2400 | 6500 |
| ZFLS-4000 | 4000 | 323–456 V | 380 V | 1800 × 1800 × 2400 | 8200 |
| Selection factor | Oil-immersed stabilizer | Air-cooled stabilizer |
| Typical capacity | Medium to very high | Low to medium |
| Cooling | Insulating oil and tank surfaces | Natural or forced air |
| Dust exposure | Internal assembly receives greater separation | Fans and ventilation paths may collect dust |
| Maintenance focus | Oil condition, seals and tank inspection | Fans, filters and airflow paths |
| Installation | Requires oil-handling and fire-safety planning | Generally simpler indoor installation |
Oil immersion is not automatically necessary for every project. An air-cooled stabilizer may be more practical for smaller indoor loads with good ventilation.
Large mining operations with huge equipment – like crushers, conveyors and pumps – tend to have changing load conditions all the time. Oil-immersed regulation is the answer, helping to keep the voltage supply stable for these high-capacity operations.
Harbours with cranes, pumping systems and cargo-handling equipment in play are bound to have gear that changes loads a lot. The right size stabilizer can really reduce sustained voltage deviation at the equipment terminals.
Metal-processing machinery, industrial furnaces and automated production lines often share the same distribution network, which can make life tricky when it comes to maintaining a consistent voltage supply. Central voltage stabilisation really helps with that.
Pumping stations, tunnels and utility facilities are often home to massive three-phase loads. The ZFLS series can regulate specific circuits where voltage fluctuations are a problem and you need to keep operational continuity going.
If your site has a lot of dust and limited air circulation, oil cooling is worth considering. Just keep in mind that you’ll still need to check how site temperature and enclosure requirements work out.
Measure the minimum and maximum input voltage during a representative production cycle. Do not rely only on the nominal utility voltage.
Calculate the simultaneous three-phase load:
kVA = √3 × line voltage × line current ÷ 1000
Then account for motor starting current, power factor, load sequence, ambient temperature, altitude and future expansion.
Also confirm:
JINMA ELECTRIC gives you a pretty big choice with their ZFLS range, available in 100 to 4000 kVA sizes – thats a far cry from just sticking with a few standard ratings like some companies do. Their IVR design – a real game changer – pairs brushless regulation with oil-immersed cooling to tackle those big industry loads with ease.
It’s worth noting too, the company doesn’t just stop at voltage regulators. They also make transformers, stabilizers and those handy frequency-conversion systems. That means their engineers can look at the whole project, taking into account how you’re going to stabilise your voltage, convert to different frequencies and meet your power needs in one go.
No – the paperwork you get with the product makes it pretty clear this is actually an inductive voltage regulator with a brushless and totally contactless regulating setup.
No chance – it just regulates the power you’ve got, wont magically power your place if the lights go out.
The oil-immersed design means it can handle demanding environments, but if you do want to put it outside – which you can – you’ll need to get the right enclosure, seal it up tight, lay on some decent cable and sort out any site-specific protection you might need.
