Air-cooled RFM capacitors are used where a water circuit is not wanted on the capacitor itself. They serve the same tank-circuit duty on small and medium furnaces.
Technical Data
| Model | UN (kV) | QN (kvar) | FN (kHz) | CN (µF) | IN (A) | Groups | L (mm) | B (mm) | H (mm) | I (mm) | II (mm) | b (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RFM0.75-500-2.5S | 0.75 | 500 | 2.5 | 56.59 | 666.7 | 4 | 303 | 120 | 250 | 105 | 87 | 55 | 14.0 |
| RFM0.75-500-10S | 0.75 | 500 | 10.0 | 14.15 | 666.7 | 4 | 303 | 120 | 195 | 105 | 87 | 55 | 12.0 |
| RFM0.75-640-4S | 0.75 | 640 | 4.0 | 45.27 | 853.3 | 4 | 303 | 142 | 250 | 105 | 87 | 55 | 16.5 |
| RFM0.75-640-8S | 0.75 | 640 | 8.0 | 22.64 | 853.3 | 4 | 303 | 120 | 225 | 105 | 87 | 55 | 16.0 |
| RFM0.75-640-10S | 0.75 | 640 | 10.0 | 18.11 | 853.3 | 4 | 303 | 120 | 210 | 105 | 87 | 55 | 12.5 |
| RFM0.75-1000-0.5S | 0.75 | 1000 | 0.5 | 565.9 | 1333 | 8 | 440 | 165 | 445 | 85 | 82 | 75 | 49.0 |
| RFM0.75-1000-1S | 0.75 | 1000 | 1.0 | 282.9 | 1333 | 6 | 336 | 142 | 430 | 80 | 75 | 60 | 31.0 |
| RFM20.75-1000-1S | 0.75 | 1000 | 1.0 | 282.9 | 1333 | 6 | 336 | 165 | 350 | 80 | 75 | 75 | 29.5 |
| RFM0.75-1000-1S | 0.75 | 1000 | 1.0 | 282.9 | 1333 | 6 | 336 | 165 | 385 | 80 | 75 | 75 | 32.0 |
| RFM0.75-1000-2.5S | 0.75 | 1000 | 2.5 | 113.2 | 1333 | 6 | 303 | 142 | 335 | 68 | 72 | 60 | 22.0 |
| RFM1.0-1000-0.5S | 1.0 | 1000 | 0.5 | 318.3 | 1000 | 6 | 440 | 165 | 385 | 125 | 87 | 75 | 40.0 |
| RFM1.0-1000-1S | 1.0 | 1000 | 1.0 | 159.2 | 1000 | 6 | 336 | 142 | 350 | 80 | 75 | 60 | 25.0 |
| RFM1.0-1000-2S | 1.0 | 1000 | 2.0 | 79.58 | 1000 | 6 | 336 | 142 | 335 | 80 | 75 | 60 | 24.0 |
| RFM1.0-1000-2.5S | 1.0 | 1000 | 2.5 | 63.66 | 1000 | 6 | 303 | 142 | 335 | 68 | 72 | 60 | 21.5 |
| RFM1.2-750-0.5S | 1.2 | 750 | 0.5 | 165.8 | 625 | 6 | 336 | 142 | 430 | 80 | 75 | 60 | 30.5 |
| RFM1.2-1000-0.5S | 1.2 | 1000 | 0.5 | 221.0 | 833.3 | 6 | 440 | 165 | 335 | 125 | 87 | 75 | 35.0 |
| RFM1.2-1000-0.7S | 1.2 | 1000 | 0.7 | 157.9 | 833.3 | 6 | 336 | 165 | 335 | 80 | 75 | 75 | 27.5 |
| RFM1.2-1200-0.7S | 1.2 | 1200 | 0.7 | 189.5 | 1000 | 6 | 336 | 165 | 385 | 80 | 75 | 75 | 31.0 |
| RFM1.2-1250-0.65S | 1.2 | 1250 | 0.65 | 212.5 | 1042 | 6 | 440 | 165 | 335 | 125 | 87 | 75 | 35.0 |
| RFM1.2-1400-0.7S | 1.2 | 1400 | 0.7 | 221.0 | 1167 | 6 | 440 | 165 | 335 | 125 | 87 | 75 | 35.0 |
| RFM1.2-1500-0.5S | 1.2 | 1500 | 0.5 | 331.6 | 1250 | 6 | 440 | 165 | 495 | 125 | 87 | 75 | 48.0 |
| RFM1.2-2000-0.5S | 1.2 | 2000 | 0.5 | 442.1 | 1667 | 8 | 440 | 205 | 435 | 85 | 82 | 95 | 56.0 |
| RFM1.2-2000-0.65S | 1.2 | 2000 | 0.65 | 340.1 | 1667 | 8 | 440 | 165 | 495 | 85 | 82 | 75 | 48.0 |
| RFM1.4-1000-0.5S | 1.4 | 1000 | 0.5 | 162.4 | 714.3 | 6 | 440 | 165 | 335 | 125 | 87 | 75 | 35.0 |
| RFM1.4-1000-1S | 1.4 | 1000 | 1.0 | 81.2 | 714.3 | 6 | 336 | 142 | 335 | 80 | 75 | 60 | 24.0 |
| RFM1.4-2000-0.5S | 1.4 | 2000 | 0.5 | 324.8 | 1429 | 6 | 440 | 205 | 435 | 125 | 87 | 95 | 54.0 |
| RFM1.6-2000-0.5S | 1.6 | 2000 | 0.5 | 248.7 | 1250 | 6 | 440 | 205 | 460 | 125 | 87 | 95 | 54.5 |
| RFM21.6-2000-0.5S | 1.6 | 2000 | 0.5 | 248.7 | 1250 | 6 | 440 | 205 | 435 | 125 | 87 | 95 | 52.0 |
| RFM1.7-1500-0.25S | 1.7 | 1500 | 0.25 | 330.4 | 882.4 | 4 | 440 | 205 | 610 | 170 | 120 | 95 | 71.0 |
| RFM1.7-2000-0.5S | 1.7 | 2000 | 0.52 | 220.3 | 1176 | 6 | 440 | 205 | 435 | 125 | 87 | 95 | 52.0 |
| RFM1.7-1000-0.15S | 1.7 | 1000 | 0.15 | 367.1 | 588.2 | 4 | 440 | 205 | 610 | 170 | 120 | 95 | 72.0 |
| Item | Value |
|---|---|
| Installation altitude | Not above 1000 m |
| Site | No severe shock, corrosive gas, steam or explosive dust |
| Cooling-water inlet | Not above 30°C / 86°F |
| Cooling-water flow | At least 4 L/min below 1000 kvar; at least 6 L/min at 1000 kvar and above |
| Overvoltage | 1.1 × UN for 4 hours |
| Continuous current | Not above 1.35 × IN |
| Catalog standards | JB/T 7110-93 and IEC 60110-1 (1998) |
| Suffix S | Water-cooled. No S suffix on the air-cooled construction shown on the same sheet |
| Model code | RFM, voltage kV, kvar, frequency kHz, S = water-cooled |
| US standard | Applies to |
|---|---|
| IEC 60110-1 | Power capacitors for induction heating — the catalog rating standard |
| IEEE 18 | US shunt-capacitor standard buyers ask to see beside IEC 60110-1 |
| IEEE 519 | Harmonic duty seen by the capacitor bank |
| ASTM B187 | Copper bus bar in the capacitor rack |
Every figure in these tables is taken from the factory sheets in the product folder and is written in English. 1 metric ton = 1.102 US short tons. Power-supply ratings can still be negotiated to the customer requirement, as the sheet itself states. American standards are the US specifications normally requested with this equipment.
Key features
- No capacitor cooling-water circuit
- Same RFM electrical series as the water-cooled units
- Selected by voltage, kvar and frequency
- Used in racks beside the power supply
Construction
- Case, bushings and natural or forced-air cooling. No water nozzles.
Working principle
Electrically the same as a water-cooled capacitor: it resonates with the coil. Heat leaves through the case instead of a water passage.
Applications
Steel, cast iron, stainless steel, copper, aluminum, aluminum alloy, brass and other non-ferrous metals.
Complete system integration
This equipment sits in the same line as the power supply, the capacitor bank, the induction coil, the magnetic yoke, the furnace body and the cooling system. A quotation can cover one item or the full line.
Customization
Capacity, voltage, frequency, dimensions and connection layout can be made to the furnace design. Send the drawing or the duty data below.
Catalog sheets
Questions before a quotation
Can the rating be customized?
Yes. Capacity, voltage, frequency, tube size and connection layout follow the furnace drawing and the metal.
What do you need for a quotation?
Furnace capacity, metal, melting temperature, melting rate, working hours, input voltage, frequency if known, tilting method and cooling-water conditions. A drawing helps.
Do you supply a single machine or the complete system?
Both. A spare coil, yoke, capacitor or cooling tower can be quoted alone. A new foundry line is quoted as a complete system.
Which metals can be melted?
Steel, cast iron, stainless steel, copper, aluminum, aluminum alloy, brass and other non-ferrous metals. The lining and the frequency follow the alloy.
Will you confirm the catalog numbers before manufacture?
Yes. The sheets on this page are the factory catalog for selection. The quotation states the rating that will be built.