Hy-Dee Brait

Hy-Dee Brait

Data

Hy-Dee Brait Data

Dielectric Strength
Reference ASTM Standard F1701: Tested dry at 100 kV AC RMS across one foot for five minutes results in leakage of less than 20 microamperes. After the sample is wetted for 15 minutes and let dry for 15 minutes, and then tested at 30 kV AC RMS over a two-foot sample for 30 seconds, the leakage is less than 49 microamperes. Yale recommends that utilities treat any rope as conductive, and this data is offered for informational purposes. We recommend you test and create your own work standards for rope products.

This is the highest dielectric-strength rope commercially available. Special polymeric olefin film converted into an eight-strand plaited rope construction that is nubby, providing excellent grip. Hy-Dee Brait™ is spliced easily, and it won’t twist or hockle in use. The Yale exclusive Aralube™ dielectric treatment helps the rope retain its superb dielectric characteristics, even when the rope has become wet. Hy-Dee Brait is excellent for hand lines and block lines where high dielectric-strength is valued. Dielectric testing of your individual “lot” of rope is available for a modest up charge.

Caution: Entrained or absorbed moisture will increase a rope’s conductivity dramatically.

Specific Gravity: 0.92









Wet Test: The wet test shall be performed on the same piece of rope used in the dry test. Prior to removing the sample from its hanging position after the dry test, the lower electrode wire must be removed and relocated 36” away from the top or high voltage electrode.  The rope sample must then be soaked in a clean, non-metallic tank filled with tap water of approximately 100-Ohm meters resistivity at room temperature using non-metallic weights to keep it submerged. After a period of 15 minutes the rope is removed from the tank and shaken 10 times. Within 3 minutes after removing from the water, the rope must be hung vertically and the electrodes must be attached. Immediately raise the 60 Hz voltage from 0 to 125 kV in not less than 10 seconds and not more than 25 seconds. The maximum voltage shall be held for 1 minute and current leakage noted at start and finish of the hold. Not to exceed 1 miliampere.



Dry Test: An 8-foot (2.4 meter) section free from knots, eyes, etc. shall be selected. Using 16 or 18 gauge solid copper wire, wrap twice around the rope and form a twisted tail at two locations 12" apart and 18" minimum from the ends. Connect the electrodes with the high voltage at the top. Raise the voltage from 0 to 100 kV (60 Hertz) in not less than 5 and not more than 15 seconds. Hold the voltage at 100 kV for 5 minutes. If at the end of 5 minutes the current is stable and has not exceeded 100 microamperes or flashed over, the specimen has passed. If at the end of 5 minutes the current is not stable and does not exceed 100 microamperes, the test shall continue for an additional 25 minutes. If at the end of that time the rope has not flashed over and the current has stabilized at less than 100 microamperes, the specimen has passed.



Video Demonstrations:
Yale Cordage High Dielectric (Hy-Dee) Wet Rope Test (125,000 Volts)
Yale Cordage High Dielectric (Hy-Dee) Rope Quick Splice


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