Two Phase Thyristor Power Controller – POW-2-PA-CL
Two Phase Thyristor Power Controller – POW-2-PA-CL
Product Description :
POW-2-PA-CL – Two Phase SCR Power Regulator for Two Phase Heater with Current Control/Current Limit and Over Load Protection.
Libratherm offers ready to use SCR Power Controller for electrical heating loads ranging from 5 KW (Single Phase) to 360KW (Three Phase). This Thyristor Power Regulator Module comprises of suitable triggering card model LTC-12 or LTC-13 or LTC-15 or LTC-18, suitably rated back to back connected SCR Modules (with electrically isolated base, mounted on the heat sink, input and output clip-on type heavy-duty connectors or aluminum/copper bus bars, semiconductor fuses and thermal cutouts. The entire assembly is mounted on an MS powder-coated enclosure, which in turn can be easily mounted inside the closed control panel as desired. A complete ready to use phase angle controlled control panel with a suitable PID / Program Temperature Controller can also be supplied as per the user’s specifications and requirements. For DC rectified output the assembly remains the same, except the SCRs are connected in Bridge Configurations.
Key Features:
- Digital Firing Cards for single-phase/two phase/three phase are Field-proven for 25+ years.
- Semikron make SCR Modules – SKKT Series are used for AC to AC control and SKKT / SKKH Series are used for AC to DC control.
- Auto-detection of phase sequence and auto-synchronization.
- Heatsinks are mounted with thermistors to protect against overheating and auto cut-off of firing in case of over temperature.
- Built-in Current Limit and Overcurrent Trip facility to limit the desired current through heaters. This feature saves on the cost of using external safety fuses.
- Soft start and Soft stop voltage across the load.
- Separate auxiliary supply of 230 VAC with built-in RFI/EMI filter – Thereby electronics are safe against line voltage fluctuations and RFI/EMI electrical noise.
- SCR Modules are protected by suitable RC snubber and surge suppressors.
- High-speed ball bearing type cooling fan – To keep Thyristor cool.
- Built-in safety fuse for the cooling fan and Auxiliary supply.
- Current control feature avoids the need for external Fuse in series with the load.
- Rugged metal enclosure & modular design – easy to install & easy to maintain.
- Libratherm Thyristors are time tested & field-proven in all major industries for the last 25+ years.
- More than 1000 installations have taken place across India & abroad and the number is growing rapidly.
- Usage of best in quality components since we understand that downtime and service cost is more expensive than the cost of the product.
Applications:
Thyristor Power Controller has a varied application and can be used with heating elements like Nichrome, Canthal, Super Canthal, Silicon Carbide, Molybdenum, Infra-Red, step up or step down transformer, etc. where precise and accurate power and temperature control is required. There is a significant electrical power saving with respect to the conventional contactor type temperature control system. Thyristors have many direct and indirect advantages compared to the electromechanical contactors. Ideally suitable for resistive, transformer, inductive, or heating loads like Silicon Carbide and Molybdenum which exhibits significant changes of resistance with an increase in temperature.
| Parameters | Description |
|---|---|
| Available Ratings | 10KW/25A to 207KW/500A. |
| Available Configuration | Single-phase, Two-phase, Three-phase (3 or 4 wire star and 3 or 6 wire delta) or DC rectifier configuration. |
| Control Action | Phase angle control (self-synchronized). |
| Control Signal | (4-20)mA / (0-5)VDC / (0-10)VDC / Potentiometer – user selectable. |
| Output | 0 to 240VAC or 0 to 415V/440AC variable voltage proportional to the control signal. 0 to 200VDC, 0 to 400VDC, 0 to 560VDC rectified output proportional to control signal. |
| DI DO control | a) Potential free contact input (DI) to remotely start/stop the Thyristor. b) Potential free contact output (DO1) to indicate the status of Thyristor ON or OFF. c) Potential free contact output (DO2) to indicate Over Load condition (Trip Contact). Available only with all the models' marked CL. |
| Smooth Control | Adjustable Ramp Up and Ramp Down Time for the soft increase and decrease of the output voltage. (Settable in the range of 2 to 20 seconds). |
| Current Control | Using on card Current Limit and Over Load Trip settings. Available only with all the models' marked CL. |
| Settings | For adjusting the voltage and current per phase using ON card presets. |
| Load Type | Suitable for both resistive and inductive/transformer load. |
| Aux. Supply Voltage | 240VAC +/- 10%, 415/440VAC. |
| Other accessories provided | a) RC snubber / MOV across the SCRs to protect against voltage transients dv/dot. b) Thermal cut-out switch on the heat sink – to protect thyristors against overheating. c) Cooling fan on heat sinks for all Thyristor regulators. d) Heavy-duty input/output terminals or Copper or Aluminum Bus bars for supply and heater Connections. |
| Size | Please refer to the Ordering Information table for all the sizes. |
| Mounting | Thyristor power regulators can be mounted on the base plate of the control panel using 4 screws/bolts. |
| Model | Product Description | Size (H x W x D) mm | Part No. |
|---|---|---|---|
| MEDIUM AND HIGH RATINGS TWO PHASE THYRISTORS (10KW TO 207KW) | |||
| POW-2-PA-CL-25 (10KW) | Two-phase thyristor power regulator - suitable for max. 10KW/25A @ 415VAC with current control and overload protection (PANEL MOUNT) | 220 x 140 x 205 | 2602-1 |
| POW-2-PA-CL-50 (20KW) | Two-phase thyristor power regulator - suitable for max. 20KW/50A @ 415VAC with current control and overload protection (PANEL MOUNT) | 220 x 140 x 205 | 2602-2 |
| POW-2-PA-CL-100 (40KW) | Two-phase thyristor power regulator - suitable for max. 40KW/100A @ 415VAC with current control and overload protection (PANEL MOUNT) | 220 x 140 x 205 | 2602-3 |
| POW-2-PA-CL-150 (62KW) | Two-phase thyristor power regulator – suitable for max. 62KW/150A @ 415VAC with current control and overload protection (PANEL MOUNT) | 325 x 185 x 245 | 2602-4 |
| POW-2-PA-CL-200 (83KW) | Two-phase thyristor power regulator – suitable for max. 83KW/200A @ 415VAC with current control and overload protection (PANEL MOUNT) | 325 x 185 x 245 | 2602-5 |
| POW-2-PA-CL-250 (103KW) | Two-phase thyristor power regulator - suitable for max. 103KW/250A @ 415VAC with current control and overload protection (PANEL MOUNT) | 325 x 185 x 245 | 2602-6 |
| POW-2-PA-CL-300 (124KW) | Two-phase thyristor power regulator - suitable for max. 124KW/300A @ 415VAC with current control and overload protection (PANEL MOUNT) | 325 x 185 x 245 | 2602-7 |
| POW-2-PA-CL-400 (166KW) | Two-phase thyristor power regulator - suitable for max. 166KW/400A @ 415VAC with current control and overload protection(PANEL MOUNT) | 385 x 200 x 245 | 2602-8 |
| POW-2-PA-CL-500 (207KW) | Two-phase thyristor power regulator - suitable for max. 207KW/500A @ 415VAC with current control and overload protection (PANEL MOUNT) | 385 x 200 x 245 | 2602-9 |
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