Introduction 1. Overview DJ-2 transformer rectifier for pipes, cables, storage tanks and other metal structures or equipment to implement impressed current cathodic protection; the primary regulator thyristor device, step-down transformer, rectifier secondary rectification, with output regulate smooth, low loss, high efficiency, and high current left margin is a good cathodic protection equipment. Equipment by the rectifier transformers, thyristor surge unit, rectifier rectifier unit, the filter inductor and control components. Which rectifier transformer, rectifier unit and the filter inductor is placed in the transformer tank, other devices placed in the control box. Special case for the use of the environment, the equipment for the special treatment, such as strengthening the capacity of the equipment corrosion, strengthen protection rating (IP65), to ensure stable operation of the equipment. 2. Main Specifications 2.1 Environmental Conditions 2.1.1 Applications: Marine Safety Zone 2.1.2 Ambient temperature: -30 ℃ ~ -60 ℃ 2.1.3 Maximum relative humidity: ≤90% 2.1.4 Altitude: ≤1000 m 2.1 .5 safety rating: 2.2 Zone 2 Power supply: Three-phase 380V ± 10%, 50Hz ± 10% 2.3 Safety Requirements 2.3.1 Insulation resistance: power line relative to the housing is greater than 10MΩ. 2.3.2 Dielectric strength: the power line on the chassis can withstand 1500V (RMS), the test voltage 50HZ, which lasted 1min flashover or breakdown should occur. 2.4 2.4.1 Input Output Ratings Rated input AC current: 15A 2.4.2 rated DC output voltage: 0 ~ 20V 2.4.3 Rated output DC current: 0 ~ 400A 2.5 2.5.1 Constant current characteristic Constant current range: 0 ~ 400A 2.5.2 Constant Current Accuracy: 1% should be better than 2.6 Ripple factor: equipment operating at rated output state, its load ripple coefficient of less than 8%. 2.7 2.7.1 overcurrent protection device is equipped with a fuse in the power input when the output overload or short circuit occurs, turn off the power. 2.7.2 When the output current limiting protection of 102% to 110% of rated output current, the device automatically enters the drying operation, concurrent sound and light alarm, when the load is reduced, the device automatically resume normal operation. 2.8 2.8.1 Automatic protection when the temperature inside the tank exceeds 85 ℃, the device will automatically cut off the output. 2.8.2 When the oil level in the tank is too low, the device will automatically cut off the output. 2.8.3 When the power supply phase, the device will automatically cut off the output. 2.9 lightning protection lightning protection circuits 2.9.1 input and output of the device should be fitted on defense, and in accordance with the provisions of IEC1024. 2.9.2 In the device output anode terminal, a cathode terminal output relative ground for the introduction of magnitude 1.5 to 2.0 million volts, repeat cycle 1 ~ 5S, a pulse width of 25ms pulse, the time of 1min, the device can work normally. 2.10 display device is equipped with the following section 2.10.1 instruments: - DC output voltage meter - DC output ammeter - transformer oil temperature meter instrument using LED 3 1/2 digit meter with an accuracy of ± 1%. 2.10.2 The device is equipped with the oil level gauge. 2.11 Cooling equipment used in oil cooling mode, the instrument full run 24h, the main components of the fuel tank inside the limits of temperature rise is less than 40 ℃. 2.12 equipment failure indicates that the device contains a fault indication fault doors open, into electrical power failures, oil overheating failure, equipment failure overcurrent, overvoltage equipment failure, equipment failure indication phase. 2.13 and 2.13.1 RTU interface transfer phase output current signal remote output interface: using standard communication interface RS-232 data transmission remote output current signal, the error is less than 1%. 2.13.2 remote output voltage signal output interface: standard communication interface for data transfer using RS-232 remote output voltage signal, the error is less than 1%. 2.13.3 respectively to six remote computer control center equipment failure. 2.13.4 by computer control center via standard communication interface RS-232 data signals to the given device, remote control functions. 2.14 Equipment Dimensions: 750 Width × 1055 × 1645 high depth, (mm)