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Liquid cooled power resistors LCPR

Liquid cooled power resistors LCPR

Liquid cooled power resistors LCPR

Product catalog summary
Introduction
Liquid cooling is an efficient method for dissipating energy from heat sources, especially when space constraints limit air cooling. The LCPR series of liquid-cooled resistors developed by KRAH-GROUP offers a modular design that allows for flexible interconnection of up to six single resistors, maintaining low temperatures and high power density in a compact form.

Specifications
  • Resistance Range: 10mΩ to 12kΩ
  • Tolerance: 5% (J) or 10% (K)
  • Working Voltage: ≤ 1500 VAC per single resistor
  • Insulating Voltage: ≤ 7 kV (IEC 60060-1)
  • Insulating Resistance: > 50 MΩ
  • Nominal Power: ≤ 20 kW
  • Impulse Loading: ≤ 1200 kJ
  • Maximum Surface Temperature: Equal to outlet temperature of coolant
  • Ambient Temperature: 0°C – 70°C
  • Coolant: De-ionized water, fresh water with antifreeze/anticorrosive
  • Flow Rate: ≤ 25l/min
  • Pressure Loss: Approximately 40 mbar
  • Working Pressure: ≤ 6 bar
  • Test Pressure: ≤ 12 bar/1min
  • Inlet Temperature: ≤ 90 °C
  • Weight: 5.0 kg - 8.0 kg without coolant
  • Electric Terminals: Threaded bolt ≤ M10 (Brass)
  • Coolant Terminals: 1” female thread DIN/ISO 228-1
  • Temperature Sensor: KTY84-130

Applications
The LCPR series is ideal for use as filter circuit or braking resistors due to its unique geometry and assembly, allowing for high power density and compact design.

Additional Notes
  • Performance depends on resistance value, size, load, and cooling parameters.
  • Temperature at electrical terminals may be slightly higher than the surface temperature.
  • All information provided is for informational purposes only; contact the company for inquiries.
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Catalog excerpts

Liquid cooled power resistors LCPR-1

Flüssigkeitsgekühlte Widerstände mit 6 frei verschaltbaren Einzelwiderständen Liquid Cooled Power Resistors with 6 freely connectable single resistors Die Flüssigkeitskühlung ist eine höchst effiziente Form, die Energie von einer Wärmequelle abzuleiten. Dies kann optimal genutzt werden, wenn herkömmliche Methoden der Luftkühlung z.B. durch begrenzte Platzverhältnisse an ihre Grenzen stoßen. Die Flüssigkeitskühlung ermöglicht auf eine einfache Weise die Temperatur der Widerstände auf einem sehr geringen Niveau zu halten. Die hohen Verlustleistungen werden durch das Kühlmedium aufgenommen und aus dem Widerstand heraus geführt; nur in einem geringen Maße wird Wärme über die Gehäuseoberfläche abgegeben. Liquid cooling is a highly efficient way of dissipating energy from a heat source. This can be utilized in an optimal way when conventional methods of air cooling are limited, for example due to limited space. The liquid cooling system easily keeps the resistor at a low temperature. High power dissipation causes heat to be assimilated by the coolant and it is then transported outside of the resistor; only a fraction of heat is dissipated over the housing surface. Die in der KRAH-GRUPPE völlig neu entwickelten flüssigkeitsgekühlten Widerstände der Baureihe LCPR bieten durch ihr modulares Konzept dem Anwender die folgenden weitreichenden Möglichkeiten: The KRAH-GROUP developed liquid cooled resistors of the series LCPR. Through their modular concept the following extensive possibilities are offered: Flexible Verschaltung der Einzelwiderstände Flexible interconnection of single resistors Variables Befestigungskonzept Variable mounting design Sehr geringes Eigengewicht Integrierte Temperaturüberwachung Integrated temperature monitoring Verwendung unterschiedlicher Kühlmedien Hohe Leistungsdichte bei kompakter Bauform High power density with compact design Die Baureihe LCPR eignet sich durch ihre Geometrie sowie den Aufbau, mit bis zu 6 Einzelwiderständen, in idealer Weise für eine Anwendung als Filterkreis- oder Bremswiderstand. The LCPR design is particularly useful for applications as a filter circuit- or braking resistor, as the design’s unique geometry and assembly allows up to six single resistors to be interconnected. KRAH ELEKTRONISCHE BAUELEMENTE GMBH, Märkische Straße 4, D-57489 Drolshagen, Telefon: 02761/701-0, Fax.: 02761/701-177 Seite 1 von 2 Lfd:Nr.: 201, Stand: 04/ 2013

 Open the catalog to page 1
Liquid cooled power resistors LCPR-2

Flüssigkeitsgekühlte Widerstände mit 6 frei verschaltbaren Einzelwiderständen Liquid Cooled Power Resistors with 6 freely connectable single resistors Bauform Style Widerstandswertbereich Resistance range Widerstandswerttoleranz Tolerance of resistance value Nennspannung Working Voltage Isolationsspannung Insulating voltage Isolationswiderstand Insulating resistance Nennleistung (1) Nominal power (1) Impulsbelastbarkeit (1) Impulse loading (1) Max. Oberflächentemperatur (2) Maximum surface temperature (2) Umgebungstemperatur Ambient temperature Kühlmedium Coolant Durchflußmenge Flow rate Druckabfall...

 Open the catalog to page 2

All Krah Group catalogs and technical brochures

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