Enclosed resistor or VPR resistor (Very Power Resistor) are resistors for high power applications.

VPR resistors are enclosed in an aluminium profile with PTFE insulated connecting wires of pure nickel. The designs S = vertical and L = horizontal are available.
The resistors can be mounted as standalone units or on a mounting base. The mounting area must be resistant to the intended operating temperature, and flame-retardant. Any installation location is possible, optimum cooling conditions are achieved in vertical position with the connecting wires at the lower end.

The enclosed resistors can be combined in various housings. Due to their design, the DEG types are also suitable for operation in high humidity condition. In the standard design, the resistors are mounted on a terminal block so that the resulting type of enclosure is IP20 or, with connection box or connection line, IP54. Cable entry is ensured through cable glands.

Different requirements are to be met by special, customer-specific solutions. Enclosed resistor profiles are also available in three-phase design and integrated star-type jumper or equipped with a shielded connecting line. The flexible application range is rounded off by project-specific assemblies and housings for direct installation underneath the frequency converter.

Our enclosed VPR resistor profiles are already UL-certified up to the size of VPR500 so that marking with the cUR mark according to our UL File E221095 is permitted. A number of housing combinations DEG and special designs are likewise covered with the cUR certificate according to the UL File.