3 February 2006 -- Dynamic braking resistors, with ratings from 200W to 16,000W for continuous operation, can be supplied by Pentagon Electrical Products. These utilise the well proven Pentagon range of vitreous enamelled resistors which are mounted singly or as multiple banks within ventilated metal enclosures. With resistance values from 1.5 to 1200 ohms, adequate dynamic braking capacity can be achieved for inverters and drives covering a wide range of industrial and engineering applications.
The nickel-chrome resistor windings are protected with multi layers of enamel prior to firing, to produce a highly reliable resistor.
These are designed to withstand the thermal shocks and adverse conditions encountered within the anticipated working environment.
Optional thermal cut-outs can also be provided, for connection in the trip circuit of a circuit breaker on a 230V AC supply.
The PDB enclosures used are manufactured from zinc coated perforated steel which is black powder coated.
These are suitable for wall or base mounting and provide IP20 level of ingress protection.
A substantial increase in power ratings can be accommodated for short term or intermittent operation.
Typically, these range from a 20:1 to 12:1 increase in the continuous load rating when a braking load is limited to a short term duration of five or 20 seconds no more than once per hour.
Other products manufactured by the company include a full range of vitreous enamelled and open wire wound resistors, anti-condensation heaters and thermostats.
