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PRODUCT BROCHURE Power resistors and electronic controllers

TABLE OF CONTENTS INDUSTRY: 04 Encapsulated high power resistors · High pulse load resistant · Intrinsically safe · Optional UL-certified 06 Housing units · Protection against direct contact · Fully assembled · Modular 08 Cement coated resistors · Optional firm or adjustable terminals · Wide range of types · Various connection technologies 10 Vitreous enameled resistors · High resistance to thermal shocks · High dielectric strength · Various connection technologies 12 Low power resistors · Ideal for printed circuit boards · Small installation sizes · Optional safe fuse 14 Liquid cooled...

FREUDE AM WIDERSTAND The KRAH Group with its headquarters in Drolshagen, Germany, was founded in 1970. The product range includes passive and electronic components, particularly wire wound resistors, electromechanical resistor components and electronic controllers. As a globally operating group of companies, KRAH serves its customers with high quality products from engineering and production facilities across Europe, Asia and the Americas. In 2023 KRAH products are produced by approximately 2,000 employees. The solutions of the KRAH Group have proven themselves millions of times in the...

INDUSTRY: ENCAPSULATED HIGH POWER RESISTORS Due to their special design, all our power resistors in aluminium or metal housings with the exception of the WD series are particularly impulse-resistant and offer high dielectric strength. To increase the nominal capacity, optional forced cooling can be carried out or the unit can be directly mounted on cooling plates or cooling elements. The compact design and the geometry of each casing ensure that the resistors are easily fixed and mounted on your application. Complete encapsulation in conjunction with a connection strand guarantees...

Field of application: Braking resistor in multi-axis robots HPRF / HPRF...C flat casing, pulse resistant, IP65 optional with stranded wire or shielded connection cable pulse resistant, IP65 especially for rotation and On- / Off-Shore applications greater surface for increased nominal capacity, particularly at forced cooling, IP65 Power rating: on demand VHPR / VHPR...C particularly pulse resistant, IP65 optional with stranded or shielded connecting cables particularly pulse resistant, IP65 especially for rotation and On- / Off-Shore applications

INDUSTRY: HOUSING UNITS Housing units from the HWG mounting system series are an ideal choice when multiple high power resistors are interconnected and/or if protection against accidental contact with hot surfaces is required. VHPR high performance resistors are used for such applications, as are tube resistors and tubular heating systems. Various connection technologies can be selected for the electrical connections, such as terminal blocks, connection housings or connection cables. The particularly powerful steel grid resistors of the KPG series can be cascaded almost infinitely and...

Field of application: elevator technology cemented tube resistors in housing, touchprotected tubular heating systems, touch-protected, IP20, at the electrical connection area up to IP54 Power rating: 100 … 12000 W higher power ratings on demand Resistance range: on demand Resistance range: on demand encapsulated power resistors in customized housings. Design is determinded by customer demands. encapsulated resistors in a housing, touch-protected encapsulated resistors in a housing, touch-protected

INDUSTRY: CEMENT COATED RESISTORS Cemented power resistors are provided with a layer of cement which provides mechanical protection and increases the nominal capacity in comparison to unprotected resistors. The curing process achieves an inorganic state, so that the cement is resistant to most solvents, fungal attack and even termites. On request, the resistors can also be supplied with silicone cement, which offers advantages in case of climatic stress (e.g. humidity). Special features and options: good mechanical protection in particular with regard to the high ohm models, high thermal...

Field of application: Precharge resistor in traction applications flat oval, with lugs or plug-type connections flat oval, suitable for screw connection flat oval with two or more flat plug-type connections with two or more lugs

INDUSTRY: VITREOUS ENAMELLED RESISTORS The carrier bodies of these series are made of specially developed fine-ceramic materials. Their particular characteristics are high mechanical resistance over the complete temperature range; good resistance to thermal shock; high dielectric strength; good leakage resistance, also at higher temperatures, and resistance to DC current. The vitreous enamelling process provides the resistor alloy with optimum protection against mechanical and climatic influences. Special features and options: optimum protection against climatic stresses, high thermal shock...

Field of application: Discharge resistor in windmills with radial tabs with adjustable lugs GS...V with corrugated band or wire with adjustable lugs GSB...V Power rating: 15 … 500 W Resistance range: 1R0 … 300K Tolerance: ±5% … ±10% Data sheets at www.krah-gruppe.de with radial lugs (acc. to MIL-R-26) with radial lugs and adjustable lug (acc. to MIL.R-19365)

INDUSTRY: LOW POWER RESISTORS The smallest resistor models are, in almost all cases, also wire-wound; however, these resistors are not wound onto a ceramic but instead onto a fibreglass carrier body. The resistance element is mounted in a casing, the casing serves to provide mechanical protection as well as increasing performance thanks to the large surface for heat dissipation. Special features and options: flame resistant, particularly pulse resistant models optionally available with axial wire leads with radial leads in ceramic casing with outer groove with soldering fuse FTX in ceramic...