Housed in either aluminium, mild steel or stainless steel containers, the capacitors are either hermetically sealed and equipped with porcelain terminals, or filled with a fire resistant epoxy resin.

Fixing brackets are available upon request and most fixings can be accommodated to meet customer's needs.

Capacitors are normally painted with a self etching primer and finished in Squirrel Grey cellulose enamel, although other finishes are available.

The mechanical techniques employed ensure that the capacitors are fit for the rigorous mechanical and environmental demands of traction duty. A choice of termination is available upon request.

Pressure Switch

These are only required for abnormal service conditions, or where there is a possible risk of over current or short circuit faults to thecapacitor, which could possibly create a pressure build up within the capacitor, causing permanent damage to the container.

Operation

Satisfactory operation of these capacitors depends on the method of cooling, whether by natural convection or forced circulation. These conditions dictate the power ratings available from a given capacitor volume, in order that thermal stability (equilibrium) is maintained.

Capacitors are normally derated for the prevailing ambient conditions under which they are operated. The lifetime expectancy is dependent upon these parameters and would form part of the discussion at the tendering stage.

Characteristics

The following parameters are applicable to the standard range of capacitor which are shown in the following tables. They should not be regarded as limitations of the range available, but only taken as an indication of the product capability. It is understood that many applications require specific capacitance values and voltage requirements, with space constraints which would render the standard range unusable. We have an experienced team to provide designs for such non standard items. NCL would be pleased to consider your specific needs upon request.

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