OMP-ICS4K15,4KW,20A Precision control type excitation inrush current protector, inrush current suppressor (non-NTC type), starting current drop 93%, so that the toroidal transformer to realize the real “soft” start, to prevent the air switch tripping, especially suitable for frequent startup scenes.
OMP-ICS4K15,4KW,20A Precision control type excitation inrush current protector, inrush current suppressor (non-NTC type), starting current drop 93%, so that the toroidal transformer to realize the real “soft” start, to prevent the air switch tripping, especially suitable for frequent startup scenes.
OMP-ICS4K15,4KW,20A excitation inrush current protector, inrush current suppressor, precision control type (non-NTC type), starting current drop 93%, so that the toroidal transformer to realize the real “soft” start, especially suitable for inductive loads need to frequently start the scene, to prevent the air switch trip.
Products::
OMP-ICS4K15 is an all-in-one precision device that integrates the dual functions of soft start and surge protection. It is designed to protect transformers, motors and other inductive loads, through the patented intelligent control technology, in the equipment start-up to achieve nearly “zero impact” smooth power, and synchronized against transient overvoltage from the grid. The OMP-ICS4K15 combines “precision soft start” and “lightning surge protection” into one, eliminating switch tripping and equipment damage caused by excitation inrush currents or surge voltages from the source.
Are you facing any of these industrial pain points?
Does the following scenario seem familiar when driving high power inductive loads such as motors, transformers, compressors, etc.?
❌ Frequent trips and production interruptions: As soon as the equipment is started, the air switch or circuit breaker inexplicably trips, causing the entire production line to come to a standstill, resulting in huge losses.
❌ Equipment is “short-lived” and costly to maintain: Contactor contact erosion, winding insulation damage, high impact of mechanical transmission components, equipment life is far below the design expectations.
❌ “Pollution” of the power grid: The moment the big equipment starts, the workshop lights flicker, and the precision instruments and numerical control systems on the same grid are disturbed or even damaged.
❌ Traditional programs are ineffective: Ordinary soft starters have been tried, but the starting current remains high, or performance deteriorates rapidly under frequent start/stop conditions.
❌ Harsh environment and lack of protection: The equipment is applied in harsh environments with humidity, dust, salt spray or wide temperature differences, where ordinary electrical components are difficult to work stably for long periods of time.
Functional Features::
Intelligent control: Precise MCU-based monitoring and over-zero detection ensures accurate and smooth startup every time. (Non-NTC type).
Three-stage gradient inhibition technology: releasing energy step by step to avoid sudden changes in current, the starting current drops 93%, realizing a true “soft” start.
Dual insurance safety guarantee: the product adopts a unique dual safety system, including MCU precision control circuit and temperature control protection circuit, effectively reducing the risk of fire in the case of non-standardized use.
Surge protection: Provide differential mode L-N or L-N, L-PE, N-PE full mode protection, higher safety level.
LED status indicator, operation/fault at a glance, easy maintenance.
Industrial motor systems: AC asynchronous/synchronous motors and their driven fans, pumps, compressors, crushers, conveyors, elevators and other heavy machinery.
Technical Parameters
Product Model
OMP-ICS4K15
Inrush current suppression:
Operating voltage (Un)
110～260V AC
Maximum load power (Pmax.)
4 kW (supports customized power)
Rated load current
≤20 A
Maximum controllable inrush current
300 A
Suppressing the back surge
≤15 A (starting current drop 93%)
response time
≤150 ms
Surge voltage protection.
protected mode
L-N or L-N,L-PE,N-PE
Maximum continuous operating voltage (Uc)
300V AC
Maximum discharge current (Imax)
10 kA (8/20μs)
Lightning impulse withstand voltage (Uoc)
20kV (1.2/50μs)
Voltage protection level (Up)
≤950 V
response time
≤25 ns
General Specifications.
operating temperature
-40℃～+85℃
protection class
IP67
Wiring Specifications (Customizable)
VDE cable: 2*1.5 mm² @160±10mm
status indicator
LED green (normal)/off (fault)
weights
400g±10g
Test basis
iec60947-4-2-2020,iec61643-11-2011
part numbers
8009901
Typical Performance Test Data
Empirical case: 3KW toroidal transformer continuous start-stop test
test condition
unprotected
Installation of OMP-ICS4K15
improved effect
Peak starting current
≥150 A
≤15 A (10A-12A typical)
Reduce >93%
Grid voltage fluctuations
Switch/Circuit Breaker Tripping
Almost no fluctuations
Significant improvement in system stability
Extreme pressure test continuous start-stop test
Equipment damage prone to overheating and performance degradation
10 times/minute, 6 seconds between each time, for 60 minutes, stable performance
Excellent reliability for frequent start/stop conditions
Product Dimensions and Installation Wiring Diagram
Installation::
➊ Mounting Location:Install the OMP-ICS4K15 in series between the lower end of the power circuit breaker (or contactor) and the input of the toroidal transformer (or inductive load), the closer to the equipment the better.
➋ Fixtures:Mount the OMP-ICS4K15 on the base plate and secure it with 4 screws.
➌ Connect the inputs:Connect the “INPUT” end of the product to the control switch circuit breaker, with the brown wire as the fire wire (L) and the blue wire as the zero wire (N).
➍ Connect the outputs:Connect the “OUTPUT” terminal of the product to a toroidal isolation transformer (or inductive load), with the brown wire as the fire wire (L) and the blue wire as the zero wire (N).
➎ Connect the ground wire:When the product is equipped with a “PE” ground wire, connect the “PE” ground wire reliably to the system grounding strip or metal case/frame (the metal case must be reliably grounded).
➏ Power up and check:After confirming that the wiring is firm and error-free, restore power supply. Observe that the green LED indicator should be always on, indicating that the device is working normally.
(For wiring diagrams, refer to the product body marking or the accompanying drawings in the instruction manual)
Precautions for installation and use::
Professional installation: It must be installed and maintained by a qualified electrician.
Dismantling is strictly prohibited: The product is designed to be sealed, disassembly by the user will result in damage and void the warranty.
Regular inspections: It is recommended to check the tightness of the wiring and the appearance of the product every six months.
Power Matching: Ensure that the load power does not exceed the rated power of the product (4KW), please consult the customization of the higher power requirements.
Failure Warning: If the LED indicator is off, it means that the LED is damaged or the internal protection function may have failed and should be replaced as soon as possible.
Environmental constraints: Despite the protection class IP67, prolonged immersion in water or exposure to strong corrosive gases should be avoided.
Inrush Current Suppressors (Excitation Inrush Protectors) Frequently Asked Questions (FAQ)
A. Product Performance and Working Principle
1. Q: What is the main function of the product's inrush current suppressor? A: This product is a combination ofsoft starttogether withsurge protectionThe core function is: the moment of energizing the motor, transformer and other inductive equipments. The core role is: in the motor, transformer and other inductive equipment energized instantly, theStrongly suppresses the large start-up inrush current it generates (can be reduced by more than 93%)The air switch can be used to prevent the air switch from tripping; at the same time, it can be used to prevent the air switch from tripping.Absorption of transient overvoltages such as lightning strikes in the power gridIt provides double protection for the equipment.
2. Q:What is the difference between your inrush current suppressors (excitation inrush protectors) and the “soft starters” on the market? How should I choose one?
This is a very critical issue. Simply put, our OMP-ICS4K15 Not a traditional “soft starter”, but aDual-function all-in-one device with integrated precision soft-start and professional-grade surge voltage protection. Its core differences from common soft starters on the market can be summarized in the following table:
comparison dimension
OMP-ICS4K15 Inrush Current Suppressor
Traditional “soft starters” commonly found on the market”
1. Core functions
Dual protection: soft start + surge voltage protection. It suppresses the starting current and absorbs grid lightning strikes and operational overvoltages.
Single function: soft start only. Mainly for motor and other loads start current control, generally does not have effective transient surge voltage protection.
2. Surge voltage protection
Professional-grade built-in. Providefull mode(L-N, L-PE, N-PE) Surge protection with through-current capability up to10kA (8/20μs)consistent withIEC 61643-11Standard, capable of defending against induced lightning strikes.
Usually absent or very weak. Most products do not integrate this feature or only use a simple varistor (MOV) to provide very limited protection and are susceptible to damage from grid shocks.
3. Principles of operation
Intelligent Gradient Suppression (non-NTC type). AdoptionMCU intelligent control + three-stage gradient suppression technologyIt realizes accurate and smooth current creepage through zero crossing detection, without the problems of heat generation, cooling, and intolerance of frequent start-up of NTC thermistors.
manifold. Commonly available: - NTC thermistor type: Low cost, but it heats itself up so badly that it can't be started continuously until it cools down. - Simple thyristor (SCR) voltage regulation type: Harmonics may be generated and interfere with the power grid.
4. Safety and security
“Dual-insurance” security system.. On top of the MCU intelligent control, it adds an independentTemperature control protection circuitThe system is designed to monitor and protect against non-regulated use (e.g., sustained overloads, short circuits), dramatically improving system safety.
Usually a single.. Reliance on master circuits or simple fuses provides a relatively low level of protection and reliability in complex fault situations.
5. Application scenarios
more comprehensive. Designed for people who need to address bothpriming shockrespond in singingGrid surgeThe scenarios of the two major challenges are designed to be particularly suitable for applications with high reliability requirements, complex grid environments or high equipment value.
more homogeneous. It mainly solves the problem of high motor starting current, and is suitable for simple starting scenarios where the power grid is stable and no additional lightning protection is required.
Summary and selection suggestions:
Our OMP-ICS4K15 is equivalent to a combination of “Power Guard” + “Smooth Start Expert”. Not only does it give your motors and transformers a smooth start, but it also guards the front-end wiring of your equipment from unexpected surge voltages, just like a professional lightning protector (SPD).
You should choose our products if your device faces any of the following situations:
The equipment is installed in areas where there may bereaction of thunder and lightningmaybeGrid operational overvoltagein industrial environments.
wishGet both start-up protection and power protection in one installation, simplifying system design and maintenance.
High value of equipment and need forHigher level of integrated security, preventing the risk of accidents.
needfrequent startup, could not accept the cooling wait time required for NTC type soft starters.
A conventional soft starter may be sufficient if:
You only need to solve the problem of high motor starting current causing tripping, and theThe grid environment is very stable and cleanThe surge protection system is already in place.
The project budget is extremely limited and it is acceptable that it is monofunctional and potentially limited (e.g., NTC-type cooling issues).
We hope this comparison will help you make a clear choice. If you still have questions about specific application scenarios, please feel free to contact our technical support team for a detailed consultation.
3. Q:Why do toroidal transformers (Firebulls) create huge surges?
This arises from the magnetization characteristics of the transformer core. The key points are as follows:
Core saturation: At the instant of energization (the point at which the voltage crosses zero to close the gate is the worst), the magnetic flux in the core needs to build up instantaneously from zero. In order to catch up with the sudden change in voltage, the iron core becomes deeply saturated.
Sudden drop in excitation impedance: The saturation of the iron core leads to a sharp decrease in its permeability, making the windingExcitation inductance (Lm) It gets very small.
Current surge: According to Ohm's law I = V / ZWhen the sense of resistance (XL = 2πfL) inductance L becomes extremely small with a sudden decrease in the current I It would just instantly become very large.
This current is “Excitation surge.” The peak value can be as high as the rated current of the transformer.5 to 15 timesThe waveforms are heavily distorted and contain a large number of DC components.
B. Technical specifications and parameters
4. Q: What does “Inrush Suppression Current (Iics): ≤15A” and “Max. Inrush Current (I_inrush, max): 300A” mean respectively in the specification? " in the specification, what do they mean respectively? A:
≤15A (Iics)This isResults after suppression.. Indicates that the value of the current that is stabilized and suppressed after the device startup is complete does not exceed 15 amps, reflecting theInhibition above 93%The
300A (I_inrush, max)This isBoundary before suppression. Indicates that the product can withstand and begin to inhibitInitial peak inrush current upper limit. If the shock exceeds this value, the product may not be fully controlled due to self-protection.
5. Q: The product has a wide operating voltage range (110-260V AC), is it universal? A: Yes, the wide voltage design allows it to automatically adapt to single phase grid voltages in most parts of the world. However, please note that the productnecessarilyWith the corresponding safety certification (such as export to Europe need CE, the United States need UL) to use, and installation specifications need to comply with local regulations.
C. Installation, wiring and use
6. Q: What are the key considerations for installation? A: Be sure to follow these three points:
sequences: mustin series connection (electricity)existLower port of the main circuit breaker (or contactor) and input terminals of the toroidal transformer (or inductive load)Between.
Fire/Zero Wire: Ensure that input and output cablesFirm connection and good conductionThe false connection will cause the product to fail.
Grounding (when the product is equipped with a ground wire)::PE grounding wire must be firmly and reliablyConnect to the system's grounding strip or to the equipment's metal enclosure (the enclosure is grounded).
7. Q: What is the reason that the LED indicator does not light up?
A: There are two possibilities for the green light not coming on:
The product is not energized or the power supply is faulty.
The product's internal protection has been disabled by extreme surges (sacrificial protection). ✅ Recommendations for action: Check the power supply first. If the power supply is normal but the light still does not lightThe equipment can continue to be energized, but has lost its protective function.If you have any questions, please contact us as soon as possible for a new product replacement.
8. Q: Does the product support frequent startup? A: Yes, that's exactly the advantage of our design. The product utilizes patented three-stage gradient suppression technology and high quality components thatDesigned for frequent start/stop conditionsThe peak current after suppression has been collected by an inrush current meter, and each time it is within the range of 10A∼15A, so the performance is stable.
D. After-sales service and certification
9. Q: What international certifications do the products have? A: This product line is based onIEC 60947-4-2(Controller) andIEC 61643-11(Surge Protector) international standard for design and testing. PassedCE,RoHSetc., other regional certifications (e.g. UL) can be provided according to the order demand volume.
10. Q: How long is the warranty offered? A: We offer for this product36 months (3 years) The warranty service. We will be responsible for repairing or replacing problems caused by defects in materials or workmanship under normal use and without disassembling the unit ourselves.
This FAQ will be continuously updated based on customer feedback and technology development. If your question is not listed here, please feel free to contact our technical support team.
Omrdon Technology 
