Ⅰ. Company Overview
Sichuan Yachen Electric was founded in 2004 and is headquartered in Mianyang (China Science and Technology City). The company focuses on electromagnetic pulse protection, power monitoring, lightning protection, medical IT isolated power supplies and other businesses.
It holds ISO three-system certification, AAA credit rating, mili-grade supplier qualification, as well as a number of invention patents, utility model patents and software copyrights.
Its products are widely applied in power, communication, rail transit, medical treatment, national defense and other fields.
Ⅱ. Core Introduction of Electromagnetic Pulse (EMP)
Sources: Natural factors (lightning, solar storms) and human-induced factors (nuclear electromagnetic pulse, non-nuclear EMP, switching operations).
Characteristics: Extremely fast rising edge, wide frequency spectrum, high field strength, pervasive penetration, and targeted damage to microelectronic devices.
Hazards: Chip breakdown, power grid paralysis, communication interruption, traffic and industrial control failure, and breakdown of critical equipment.
Ⅲ. EPPD Product Positioning
Different from conventional Surge Protective Devices (SPD), EPPD is specially designed to resist high-energy narrow pulses, nuclear electromagnetic pulses and 35MHz damped oscillatory waves, featuring faster response and comprehensive protection.
It provides dual protection against spatial radiation and line conducted interference. Beyond basic lightning protection, it defends against high-intensity electromagnetic attacks and electromagnetic interference.
Ⅳ. Product Models & Technical Specifications
- EMP-45KA: Single-phase, nominal discharge current 45kA (8/20μs)
- EMP-85KA: Three-phase, nominal discharge current 85kA (8/20μs)
Key Performance:
Response time ＜15ns;
Withstands 500A double exponential wave, 300A damped oscillatory wave and 10/350μs direct lightning current.
Compliance Standards: GJB 8848-2016, GB/T 18802.11-2020.
Ⅴ. Core Functions
- Full-mode protection (L-N, L-PE, N-PE)
- Pulse counting, fault alarm and real-time status monitoring
- Optional configurations: pulse parameter monitoring, grounding condition monitoring, wireless/wired remote transmission, APP & mini-program background viewing
- Flexible installation: DIN rail mounting / wall mounting; flame-retardant, explosion-proof and corrosion-resistant enclosure
Ⅵ. Application Scenarios
Widely used in key facilities including mili industries, scientific research institutes, emergency command centers, data centers, airports, railways, energy storage depots, high-intensity electromagnetic test sites, etc.
Ⅶ. Core Advantages Summary
- Professional electromagnetic pulse protection (including nuclear EMP), far beyond ordinary lightning protection.
- Superior to conventional SPDs with faster response and stronger resistance to high-energy narrow pulses.
- Built-in intelligent monitoring system, supporting remote management.
- Mili-grade quality, complete qualification certification, and certified by authoritative third-party testing institutions.
- For more detail, please download the brochure here
- •The main protective components utilize dual-energy wave sensitive ceramic elements and a controllable discharge gap with arc-extinguishing circuitry;
- •the mainboard is manufactured using ultra-high-reliability PCB board and PCBA/SMT processes, exhibiting excellent electrical insulation and temperature resistance;
- •it employs full-mode protection modes including L1, L2, L3-N; L1, L2, L3-PE; and N-PE;
- •it features recording capabilities for 0-999 impact cycles and impact time (optional);
- •it includes optional monitoring functions for electromagnetic pulse parameters such as peak value, energy, waveform steepness, and charge.
- •optional protective status monitoring;
- •optional online grounding status monitoring;
- •monitoring information can be accessed via wired or wireless communication through an app, WeChat mini-program, or B/S architecture backend software;
- •high-quality flame-retardant terminals for protection against electric shock and misconnection, with a maximum wire diameter of 35mm²; 10~16mm² installation cables;
- •a high-quality cold-rolled steel chassis with excellent fire resistance, explosion-proof, corrosion resistance, and salt spray resistance;
- •various installation options, supporting wall mounting and 35mm DIN rail mounting to meet complex installation requirements.
| Technical Standards | GJB 8848-2016 Test Methods for Electromagnetic Environment Effects of Systems | |
| GB/T 18802.11-2020 Low-voltage surge protectors ( SPDs) Part 11: Performance requirements and tests for surge protectors in low-voltage power supply systems; (equivalent to IEC61643-11) | ||
| Protection level | T1, T2 | |
| Protection type | L1, L2, L3-N; L1, L2, L3-PE; N-PE full mold protection | |
| Enclosure protection level | IP20 | |
| Applicable temperature | -40℃ to +85℃ | |
| Applicable humidity | Relative humidity <95%RH | |
| model | EMP-45KA | EMP-85KA |
| Nominal operating voltage Un | 220V (AC, 50Hz) | |
| Maximum continuous operating voltage Uc | 380V (AC, 50Hz) | |
| impulse discharge voltage | 1.2/50μs, 15kV | |
| Impact discharge current Iimp | 10/350μs, >12.5kA | 10/350μs, >15kA |
| Nominal discharge current In | 8/20μs, 45kA | 8/20μs, 85kA |
| Maximum discharge current Imax | 8/20μs, 60kA | 8/20μs, 100kA |
| Electromagnetic pulse current | 20/500ns, >500A |
| Electromagnetic interference current | 35MHz damped oscillation antenna oscillation wave, >300A |
| Limiting voltage Uoc | <700V (8/20μs, 5kA+1.2/50μs, 10kV) |
| Voltage protection level Up | L1, L2, L3-N; L1, L2, L3-PE, <1.2 kV; N-PE, <700V |
| Response time T A | <15ns |
| Impact counting | Number of impacts (0-999), impact time |
| Waveform monitoring (optional) | It can record electromagnetic pulse peak value, energy, waveform steepness, charge, etc. |
| Protection status monitoring (optional) | L1, L2, L3, and N lines: Normal (green light), Degraded (yellow light), Failed (red light) |
| Grounding status monitoring (optional) | PE circuit, good or bad |
| Communication port | 1 normally closed and normally open contact, 2 spares |
| Communication methods | Wired or wireless communication (communication mode can be specified) |
| Background monitoring mode (can be added) | APP, WeChat mini-program, or B/S architecture backend software |
| External dimensions | EMP- 85 207 *152*85mm/ EMP-45 207*114*85mm |
- protection function schematic diagram
- protection function schematic diagram
- Monitoring data is transmitted from the device’s internal communication module via fiber optic cable to the smart gateway, and then via a network switch and local server to the local platform for viewing using human-machine interface software.
- The PCUI double exponential wave injection wave, based on the GJB8848-2016 standard, has a rise time of 8-10 ns and a fall time of 500 ns. A 10/500 ns single pulse is typically used, with an impact energy of 100-500 A. It is primarily used to verify the protection and hardening capabilities against nuclear and non-nuclear electromagnetic pulses generated by electromagnetic pulse weapons or large nuclear test devices that can cause equipment damage. This device is designed to provide protection against 500 A and has passed testing.
- Based on the GJB8848-2016 standard, a 35MHz PCI antenna damped oscillation wave was generated using a 35MHz charging line pulse source, producing 20 consecutive pulses with an impulse energy of 100-300A. This was primarily used to verify the suppression capability of spatial electromagnetic interference generated by strong electromagnetic interference sources and the interference harmonics when these sources act on a loop system. The device is designed with a protection capability of 300A and has passed testing.
- The homepage directly displays alarm indicators, alarm analysis, alarm processing progress, etc., allowing users to quickly focus on key information and carry out targeted actions; it also provides statistics on the frequency and causes of faults within a given period.
- 1. Question: Should a backup protector be installed at the front end of the product? (Can the product withstand the instantaneous short-circuit current and be damaged in the event of a short circuit?)
- No backup protector is needed. 1. The product itself has a reliable thermal trip device, and because it uses a varistor-gap series structure, there is no leakage current during operation, so thermal collapse will not occur. There is no short-circuit fault during operation; the only failure is an open circuit. 2. SSDs themselves have low energy tolerance to narrow pulses and are easily damaged by high-energy narrow pulses. Therefore, it is not recommended to install any backup protection device at the front end.
- 2. Question: Does the product function include all surge protection features? Is it unnecessary to install surge protectors and filters after installing the product?
- The product itself has both 8/20us and 10/350us surge protection capabilities, therefore, there is no need to install an additional surge protector (SPD) in the same circuit.
- (If this product is installed in a single distribution cabinet, surge protection is not required. Surge protection is required for circuits outside the protection circuits of this product throughout the entire circuit system.)
- 3. Question: It is suggested to add a parameter and function comparison table for the product and surge protection.
- This product is mainly used for protection against high-energy electromagnetic pulses, not just lightning electromagnetic pulses. The main differences between surge protection and electromagnetic pulses are: 1. Surge protection is mainly used for protection against wide pulses, while electromagnetic pulse protection is mainly used for high-energy narrow pulses, oscillation pulses, nuclear pulses, etc. (Therefore, the main parameters are not directly comparable.)
- 4. Question: Should the number of installations and the installation location be graded? (The product is connected in parallel with the power switch at the front end of the equipment.)
- This product is mainly used for protection against high-energy electromagnetic pulses and is not applicable to SPD standards and lightning protection standards. Therefore, there are no “grading” requirements. It only needs to be installed near the power supply side of the equipment to be protected.
- 5. Question: For radiated coupling current and voltage, if it is coupled in from the cable interface of the equipment, can our product protect against it?
- This product is mainly used for protection against conducted voltage and current waves of high-energy electromagnetic pulses in power lines. If the device itself is a source of interference, it can be installed at the device’s power output. (The coupled induced pulse can only be generated in a closed loop; the induced current and voltage differ from the coil size formed by the closed loop.)
- 6. Question: Does the protection device only function when the energy reaches a certain threshold? (For example, if the energy of lightning, weapon tests, or external interference pulses is not high, will the protection device work?) (That is, it only functions when the voltage level exceeds the residual voltage level by at least 700V.)
- The product starts working when the induced pulse energy (voltage ≥ 1000V, current ≥ 100A) is reached. If it is less than these parameters, the line and equipment are considered to be withstandable. Residual voltage is irrelevant.
- 7. Question: Do EPPDs all achieve protection through grounding discharge?
- The protection method is called grounding equalization (to reduce the impulse potential at the protected port, it is recommended to install a compensating grounding electrode if conditions permit. If this is not possible, it is not necessary.)
Mili grade EMP protection device EPPD
- (For China market):
Sichuan Yachen Electric Co., Ltd.
Homepage: http://www.ycdqkj.com.cn
Contact: Mr. Xu
Tel (Wechat): +86 13088269292
Technical: +86 816 6394499
Commercial: +86 816 2311298
For international sale, please contact:
Qingdao Britop International Trading Co.,Ltd.
Website: https://qdbritop.com
Contact: Bright Meng
Email: britop@qdbritop.com - Tel (Wechat): +8613811458455
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