ERIFLEX. FLEXIBAR Performance with Frequency

Transcription

1 ERIFLEX FLEXIBAR Performance with Frequency

2 Current and temperature ratings of ERIFLEX FLEXIBAR as published in the ERIFLEX catalog are based on operating frequency up to 00Hz. If a particular application of ERIFLEX FLEXIBAR will require operation at higher frequencies, the maximum current values must be reduced (or de-rated) to achieve the published temperature rise. All copper conductors have higher impedance at higher frequencies. This is not a unique characteristic of ERIFLEX FLEXIBAR. However, the rectangular cross-section of ERIFLEX FLEXIBAR reduces this effect as compared to cables with round cross-section. The formula below specifies how the de-rating factors on the attached graphs should be used: I f ~= I 00Hz K f Where I f equals the de-rated current at the operating frequency and K f equals the de-rating factor at that frequency. To determine the K f (current de-rating value) for a particular configuration, select the graph that pertains to the width of ERIFLEX FLEXIBAR and the curve that pertains to the number of laminates. Next, identify the frequency of the current according to the logarithmic scale on the x-axis. The de-rating factor for the specific configuration can be read from the y-axis of the graph at the point where the curve meets the desired frequency. The current value listed in the catalog must then be divided by K f to determine the current value at which the published temperature rise will be achieved. Example: Consider a system with current of 470 amps at khz. For ERIFLEX FLEXIBAR width of mm and a temperature rise of 50 C, it can be seen from the graph, de-rating factors range from. to.9 depending on the number of laminates. Multiply the operating current of the system by the de-rating coefficient for each mm ERIFLEX FLEXIBAR at khz. Next compare the calculated currents to the currents in the catalogue. You will notice that the lowest number of laminates that will produce a temperature rise at or less than 50 C is 8, thus you would choose ERIFLEX FLEXIBAR part number in North America, or in Europe. For further information, contact ERICO Application Engineering or visit

3 Widths and 5.5 mm x x x x x 0.5 Width 0 mm x 0 x 0 x 4 0 x 5 0 x 6.5

4 Width 4 mm x 4 x 4 x 4 4 x 5 4 x 6 4 x 8 4 x 0.5 Width mm x x x 4 x 5 x 6 x 8 x

5 Width 40 mm x 40 x 40 x 4 40 x 5 40 x 6 40 x 8 40 x 0.5 Width 50 mm x 50 x 4 50 x 5 50 x 6 50 x 8 50 x

6 Width 6 mm x 6 x 4 6 x 5 6 x 6 6 x 8 6 x 0.5 Width 80 mm x 80 x 4 80 x 5 80 x 6 80 x 8 80 x

7 Width 00 mm x 4 00 x 5 00 x 6 00 x 8 00 x 0 00 x.5 7

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