Input parameters: Three phase AC400V±10% 50Hz, three-phase unbalance degree≤5%,In line with the national power quality standards.
Output parameters: DC 0~640V 0~460A
Output mode: Ordinary DC
Cooling method: Air cooling
Power supply type: Silicon controlled power supply
Application Industry: Marine rectifiers provide stable DC power for ships and offshore platforms, supporting anti-corrosion, propulsion, electrolysis and industrial control systems.
Designed for marine and industrial use, the KGFB-460A/640V is a high-efficiency marine rectifier that uses Silicon Controlled Rectifier (SCR) technology to convert three-phase AC power into stable DC output.This marine rectifier employs advanced phase-control technology and a closed-loop control system to deliver precise regulation of voltage and current. The system is intended for applications that require reliable DC power together with compact installation and dependable long-term operation under demanding conditions, making it a specialized marine rectifier for harsh environments.
Product Applications
For marine and offshore applications, marine rectifiers are used to supply stable and continuous DC power for critical electrical equipment. As a robust marine rectifier, it is frequently installed in anti-corrosion protection systems, propulsion support units, electrolysis equipment and industrial control applications onboard ships and offshore platforms. This marine rectifier is designed to perform reliably in demanding ocean environments.
Field application diagram
Technology Advantages
Control & Regulation › RS485 digital control function (MODBUS-RTU protocol) – supports remote monitoring and automation for this marine rectifier. › Closed-loop phase control – samples output voltage and current in real time for stable regulation of the marine rectifier. › Dual-mode operation – switchable between constant current (CC) and constant voltage (CV) stabilization. › High stabilization precision – current and voltage precision ≤1%
Power Performance › High power factor – COSΦ ≥0.95 › High efficiency – rated output efficiency ≥90% › Wide output range – DC 0–460A / 0–640V, fully adjustable › High reserve factor – silicon component voltage and current reserve ≥3 times
Structural & Thermal Design › Reasonable structural design – horizontal type, compact footprint (H1750×W850×D1300mm) › Only the radiator is in the air duct – minimizes dust accumulation on electronic components of the marine rectifier › Effective sealing and isolation – protects internal electronics from contamination › High protective properties – suitable for harsh marine/industrial environments, as expected from a durable marine rectifier
Protection & Reliability › Practical and effective multiple protection system – includes over-voltage, over-current, phase loss, soft start, and over-heat protection › High reliability – MTBF ≥50,000 hours
› Optional N+1 redundant backup › Full soft switching technology – reduces switching losses and electromagnetic interference › High insulation strength – AC1000V, 10mA, 1 minute › High insulation resistance – ≥5MΩ
Wiring & Installation › Standard wiring and special wiring – flexible copper bar or cable connections › Clear grounding requirements – ground resistance <4Ω, dedicated grounding stud › Sufficient maintenance space – >1m front and back reserved in design
Schematic Diagram & Working Principle
The AC input is controlled by SCRs and sent to a transformer to obtain low-voltage AC. It is then rectified into DC output to supply the required voltage and current. The control circuit samples output voltage and current, applies closed-loop feedback, and uses phase control to adjust the SCR triggering angle, ensuring stable output of this marine rectifier.
Schematic Diagram of Main Circuit
Cooling Type for Marine Rectifier
Air Cooling:Heat dissipation fan + air duct + comb heat sink
Water Cooling：Built-in water circulation line
Technical Parameters
Feature Type
Parameter
Technical Requirements
Input feature
Rated input voltage
Three phase AC400V±10% 50Hz, three-phase unbalance degree≤5%,In line with the national power quality standards.
Rated input current
AC 555 A
Rated input power
384 KVA
Rated input power factor
COSΦ≥0.95
Output feature
Output voltage
DC 0～640V
Output current
DC 0～460A
Stabilized current precision
≤1%
Stabilized voltage precision
≤1%
Display precision
1A， 1V
Even coefficient between rectifier arms
≥0.9
Reserve factor
Silicon component voltage and current reserve≥3 times
Rated output efficiency
≥90%
Insulation feature
Insulation strength
Input-output: AC1000V, 10mA, 1 minute
Input-shell:AC1000V,10mA,1 minute
Insulation resistance
Input-output:≥5MΩ
Input-shell: ≥5MΩ
Output-shell: ≥5MΩ
Protection features
With protection functions, such as over-voltage, over-current, phase loss, soft start and over-heat
Other features
Noise
≤65dB
MTBF
≥50000h
Load level
Level Ⅱ
Insulation grade of the transformer
Grade F
Input-output:
The product can run at full load continuously
*OK to Customized according to requirements*
Solution
Liyuan will keep up with the world’s latest technology closely, and uphold the concept of providing customers with high-quality power supplies and professional integrated services.
With advanced design and rich experience in rectifier manufacturing, we will provide the best power solutions as well as the most stable and efficient power supply for users both at home and abroad.
Technical Capability
LIYUAN rectifier is the most competitive brand in China
Company relies on strong technology research and development cooperation basis, created a number of advanced technology, in recent 3 years amounted to more than 30 to apply for a patent, which has nearly 10 patents of invention.
Equipped with the national electric power transformation and control engineering technology research center (branch), and has set up a loan enterprise academician workstation.
Strict implementation of ISO quality management system, and through the CE safety certification, has been implementing ERP management for many years, to achieve the network, systematic computer control, the formation of a standard, efficient modern management system.
Qualification certification
Liyuan adhere to innovation and the continuous improvement of power conversion efficiency and product quality.
The increasing R&D investment every year, and cooperation with China’s well-known universities, we has established the research center of national electric power conversion and control engineering technology.
Especially the related core patents of high-power synchronous rectifier power supply, stay ahead of the whole industry in China.
The ISO 9001 quality management system has been fully implemented in Liyuan, including quality inspection of components in warehouse, production process inspection, and final product inspection.
We adopt advanced scientific quality management system and the most stringent testing methods in the whole process to ensure the stability and reliability of products.
Service
› Packing
1.Small size rectifier packing in carton box separately.
2.Large size rectifier will be packed in wooden case.
3.We guarantee that all the packing is intact when it reaches its destination.
› Shipping
1.30-45 Days after payment.
2.Transport: DHL, FEDEX, UPS, Air shipping, Boat shipping
3.You may choose our shipping partner or your own partner.
› Maintenance
We are pleasant to share our theory and experience on equipment maintenance with users.
We are pleasant to interact with users to collect their tips and know-hows on equipment maintenance.
The module “Maintenance” here is intended to help users solve various problems they possibly encounter during equipment maintenance…
If you need other marine rectifiers, we can custom design them according to customer requirements. Please contact us.
Looking for a 460A 640V silicon controlled marine rectifier factory? Liyuan Haina Rectifier is one of the professional manufacturers and suppliers in this field. With over 27 years of focus on R&D, design, production, sales, and technical services for industrial rectifiers, we have already exported our products to the United States, Canada,Pakistan, Britain, Italy, Spain, South Africa, Russia, the UAE, Japan, South Korea, Malaysia, and other parts of the world. Equipped with a productive factory, we warmly welcome you to purchase our high-quality, Made-in-China products at competitive prices or try our customized service.
