In Iron&Steel facilities, iron and steel materials are carried with magnet lifts and these magnet lifts require DC voltage which is supplied by Magnet Lift Rectifiers.
PMI Magnet Lift Rectifiers are designed for heavy duty use and consist of thyristor rectifier bridges to convert AC input to DC. An isolation input transformer is applied for best immunity to mains disturbance and galvanic isolation to the DC branch.
| GENERAL | |
|---|---|
| Topology | Full Bridge Phase Angle Controlled Thyristor Module Rectifier |
| Control | Microprocessor Controlled System |
| DEMAGNETIZING TECHNIQUE | |
|---|---|
| Option-1 | Freewheel Diode and Contactor |
| Option-2 | IGBT Bridge (Reverse Voltage Applied for Instant Demagnetizing ) |
| INPUT | |
|---|---|
| Input Isolation Transformer | Galvanically isolated / Primary & Secondary Earth Screened |
| Nominal Voltage and Tolerance | 110/127/190/200/220/230/240/380/400/415/480 VAC ±15% (1 Phase or 3 Phase) |
| Nominal Frequency | 50 Hz / 60Hz ±5% |
| Input Protection | Input: Thermic-Magnetic Over Current Protection, Over Voltage Protection, Phase Sequence Free Operation (3 Phase), Soft Start, MCB |
| OUTPUT | |
|---|---|
| Battery Charging Principle | Constant Current/ Constant Voltage |
| Rated Power | Depends on DC voltage and Current |
| Nominal Output Voltage | 110 / 220 VDC (Optional DC Voltages Available) |
| Output Current Adjustment | 0-100% of Nominal Output Current |
| Static Tolerance | ±1% (Lower values available upon request) |
| Output Voltage Ripple RMS | ≤ 1% RMS AC of Output Voltage |
| Boost voltage (V/C) | 2,4 lead acid battery 1,60 NiCd Battery (Depends on battery manufacturer recommendation) |
| Float voltage (V/C) | 2,23 lead acid battery 1,40 NiCd battery (Depends on battery manufacturer recommendation) |
| Dynamic Response Time and Voltage Variation | <50msec, <+/-5% (for 10% – 100%, 100% – 10% step load change) |
| CONTROL ELEMENTS | |
|---|---|
| Battery Test | Automatic or manual selectable. Please refer to user manual for details |
| Boost Timer | 0 – 99,9 hours adjustable by 1 minute accuracy |
| Current Limitation | Total output current and battery current can be adjusted separately |
| ALARM CONTACTS | |
|---|---|
| Open or closed free alarm contacts | “Low Battery, Mains Input Normal / Failure, Charger Failure, Overtemperature, Charger Overvoltage, Load MCB ON/ OFF, Battery MCB ON / OFF, Earth Fault” |
| DISPLAY PANEL & MEASUREMENT | |
|---|---|
| Measurements | LCD Display for Line Voltage / Frequency / Current (Standard in 1 Phase, Optional for 3 Phase), Battery Output Voltage / Current, Load Output Voltage, Charger Total Output Current |
| Indicators | Float Mode, Boost Mode, Current Mode, Equalize Mode, Battery Ending, Low Battery, Battery Test Failure, Line Failure, Fan Failure, Over Voltage, Under Voltage, Over Temperature, Rectifier Failure, SCR Fuse Failure, Mains Available, Load MCB, Battery MCB |
| Adjustable Parameters | Float Charge Voltage, Boost Charge Voltage, Equalize Charge Voltage, Battery Charge Current, Rectifier Total Output Current, Low Battery Voltage Alarm, Earth Fault Leakage Current Alarm (only available in 4 line LCD), Battery Ending Voltage Alarm, Online Battery Test Parameters, Auto Boost Charge Parameters, Password |
| Event History | Last 250 events recorded and displayed on front panel and on PC via remote communication |
| Sound Alarm | On Warning Messages 2 Short ‘beep’ per 2 seconds |
| SAFETY & ENVIRONMENT | |
|---|---|
| Circuit Breakers | Input: Miniatur circuit breakers; Output: Miniatur circuit breakers / NH Fuse; Battery: Miniatur circuit breakers / NH Fuse |
| Over Voltage Protection | IEEE 587 4500 A, 110 Joules (standard) / 40kA Surge Arrestor (OPTIONAL) |
| Electrical Interference Reduction | FCC Part 15 Class B |
| Electrical Standards | EN 50091-1 (Security) / EN 50091-2 (EMC) |
| Protection Level / Color | IP 20 / RAL 7035 (Standard), (Higher IP rating and different colors are available, please consult) |
| Isolation Voltage | 2000VAC input/chassis and output/chassis |
| MTBF | 100,000 hrs. (w/out battery group) |
| Enclosure Material | Mild Steel, Zinc-phosphate coated; 100 µm electrostatic paint; 1.5 mm thickness |
| Cooling | Forced fans / Natural (optional) |
| Cable Entry | Bottom / Top (optional) |
| Heater & Lightning | OPTIONAL |
| Operating Temperature | -10 / +40 °C. Higher operating temperatures are available, please consult |
| Relative humidity | 5 – 90 % |
| Operating Altitude | Max. 1000 Mt. (Higher altitudes requires de-rating, please consult ) |
| Noise Level | Max. 65 db |
