The Automated Protection Devices Manufacturer!
Baoding Smail Electric Co., Ltd. was established on July 1, 2009 and is located in the National High-tech Industrial Development Zone of Baoding City, Hebei Province. It is a high-tech enterprise focusing on the research and development of power system automation, relay protection and instrumentation.
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![Small Current Grounding Fault Location Device]()
Small Current Grounding Fault Location DeviceMost of my country's 3kV to 66kV distribution networks use low-current grounding methods, i.e., neutral point non-effective grounding methods, including ungrounded neutral systems and neutral point -
![Industrial Control Computer Low-current Grounding Fault Location Device]()
Industrial Control Computer Low-current Grounding Fault L...Operating System: Real-time Linux + RTOS. Utilizing a real-time Linux + RTOS (RTOS, Real-time Operating System) architecture, the system meets the operating system requirements of the State -
![Distributed Grounding Fault Tripping Device]()
Distributed Grounding Fault Tripping DeviceAddressing the current problems and major pain points in single-phase grounding fault location in distribution networks, as well as the future construction and development needs of distribution -
![Arc Flash Protection Device]()
Arc Flash Protection DeviceThe medium-voltage switchgear for plant/distribution systems serves as the power supply hub for the entire plant's auxiliary equipment/power supply system. -
![Anti-islanding Protection Device]()
Anti-islanding Protection DevicePV Power Plant Grid Connection Point: For PV power plants with a step-up substation, this refers to the high-voltage side busbar or connection point of the step-up substation; for PV power plants -
![High-voltage Anti-islanding Protection Device]()
High-voltage Anti-islanding Protection DeviceThe SMR-3910BG microprocessor-based anti-islanding protection device is suitable for anti-islanding protection on the load side or small power supply side of voltage levels of 10kV and below. It can -
![Microcomputer Harmonic Suppression Device]()
Microcomputer Harmonic Suppression DeviceThis product is suitable for low-current power supply systems with voltage levels of 380V, 3kV, 6kV, 10kV, 35kV, and 66kV, where the neutral point is ungrounded or grounded via an arc suppression -
![Zero-sequence Current Transformer]()
Zero-sequence Current TransformerZero-sequence current transformers are used in conjunction with relay protection devices or signals when a zero-sequence grounding current is generated in a power system, causing the device -
![High-precision Zero-sequence Current Transformer]()
High-precision Zero-sequence Current TransformerThe SMR-H2L high-precision zero-sequence current transformer maintains excellent accuracy even with low primary-side input current, overcoming the shortcomings of traditional zero-sequence current -
![Reverse Power Protection Device]()
Reverse Power Protection DeviceWhen a photovoltaic (PV) power station is designed for irreversible grid connection, a reverse power protection device (also known as an anti-reverse current protection device) should be configured
Why Choose Us
One-stop service
The company has a 3,600 square meter production base, with advanced production equipment and technical teams as well as R&D teams. It can customize products according to customer needs and strictly implement quality management systems to ensure product quality and production efficiency.
Production Market
Our products have won long-term trust and praise from customers such as State Grid, China Southern Power Grid, China Guoneng, China Huadian, State Power Investment Corporation, China Datang, China Huaneng and other major energy companies.
Certifications
It currently owns more than 20 patents and 18 software copyrights, and has passed ISO 9001 quality management system, ISO 14001 environmental management system and ISO 45001 occupational health and safety management system certification.
Our Company Offers The Following Products
Benefits of Arc Flash Protection Device
Protect the safety of the power system: Arc Flash Protection Device can detect the arc event in the circuit, and cut off the fault circuit within a few milliseconds, prevent the arc event from spreading, and protect the safety of the power system and workers. This can reduce the occurrence of power system accidents, reduce maintenance costs, and improve the reliability and stability of the power system.
Improve equipment life: Arc Flash Protection Device can avoid arc events in the circuit, reduce equipment wear and damage, and prolong equipment life. This reduces the cost of equipment repair and replacement and improves the operating efficiency of the power system.
Improve the efficiency of the power system: Arc Flash Protection Device can cut off the fault circuit in time to avoid energy loss and waste in the power system. This can improve the operating efficiency of the power system and reduce the energy consumption and cost of the power system.
Improve work efficiency: Arc Flash Protection Device can automatically detect arc events in the circuit, avoiding the tedious process of manual detection, improving work efficiency, and reducing the impact of human factors on the operation of the power system.
Realize intelligent management: Arc Flash Protection Device can be connected with other intelligent equipment such as protective equipment and a monitoring system to realize intelligent management of the power system.
Key Configuration And Setting Recommendations For Arc Flash Protection
Sensor Selection and Installation
Point Sensors: Simple installation, low cost, require reasonable planning of quantity to ensure coverage.
Fiber Optic Sensors: Large detection range, no dead angles, but slightly more complex installation and higher cost.
Absolutely avoid pointing sensors directly at the cabinet door viewing window, lighting, or other light sources.
Current Setting
Feeder Circuit: Iset should be greater than the load current but less than the minimum fault current. Typically can be set to > 1.2 I_load (load current).
Busbar Circuit: Iset should be set above the maximum load current and the current flowing through the busbar during a feeder fault, usually set to > 1.3 I_max (maximum load current).
Time Setting
Arc flash protection generally operates instantaneously, without time delay.
Ensure the inherent opening time of the relay and breaker itself is sufficiently short (total operation time ≤ 100ms).
Testing and Maintenance
A functional test must be performed before system commissioning, simulating an arc flash signal (using a dedicated test lamp) to verify the correctness of the sensors, logic, and trip circuit.
Conduct regular inspections to check if sensors are obstructed or contaminated.
Iron core
The iron core of a zero-sequence current transformer is usually made of silicon steel sheets. It has good magnetic permeability and low hysteresis loss, and can effectively conduct the magnetic field.
Primary winding
The primary winding is the main winding in the zero-sequence current transformer, through which the zero-sequence current to be measured flows. The primary winding usually consists of multiple strands of insulated wire to provide adequate current capacity and electrical insulation.
Secondary winding
The secondary winding is the auxiliary winding in the zero-sequence current transformer and is used to output a secondary current signal proportional to the primary current. The secondary winding usually consists of insulated wires wound around an iron core.
Insulation material
Insulation material is used to isolate the primary winding and secondary winding to ensure safe and reliable operation. Common insulation materials include insulating paper, insulating paint and insulating tape.
Enclosure
Zero-sequence current transformers are usually protected by an enclosure to provide mechanical strength and protection. The shell is usually made of insulating materials or metal materials with good heat resistance, corrosion resistance and insulation properties.
Zero sequence current transformer installation environment
The zero sequence current transformer should be installed in a humid environment to prevent corrosion and make the sensitivity decline, resulting in the protection device to refuse to move. If it must be installed in a humid environment, it should be installed in an airtight box to prevent rain and humid air from entering.
Zero sequence current transformer should avoid installation in high and low temperature environment. Because the temperature is too high or too low will affect the magnetic conductivity of the transformer, thus affecting the stability of the action.
Applications of Zero-sequence Current Transformer
Safety Protection
Prevents electric shock and electrical fires. Applications include: shopping malls, hotels, schools, residences, factories, and other densely populated or high-risk fire locations.
System Protection
Protects the power grid and equipment from grounding faults. Applications include: fires, equipment damage, electric shock, and leakage current circuit breakers.
Condition Monitoring
Provides early warning of insulation degradation, enabling predictive maintenance. Applications include: hospital operating rooms, chemical plants, and data centers.
Quality Analysis
Assists in power quality management. Applications include: Power quality monitoring systems, smart buildings, data centers, and industrial plants.
Packing Details
We will packing by professional export packing,safety against breakage, finally into the wooden cases/ carton/pallet or customized package.
Delivery Details
We can deliver by SEA,air,rail transportation,the China-Europe Railway Express etc.
TNT, DHL,UPS, FEDEX, EMS，S.F EXPRESS etc.
FAQ
We are one of the most professional automated protection devices manufacturers in China, also support customized service. Please rest assured to buy high quality automated protection devices at low price from our factory. If you have any enquiry about samples, please feel free to email us.
Low current grounding fault location, Arc Flash Protection Device, Small Current Grounding Fault Location Device
