It is particularly given a preliminary inspection for punctures, tears, cuts, important to incorporate positive means of grounding the bruises, ozone cutting or checking, or any other obvious high-voltage section of dc test apparatus due to the likely conditions that would adversely affect performance. See presence of high-voltage capacitance charges at the conclusion Guide F If any of these conditions are found, the glove of the test.
Minor surface corona cutting or ozone checking in ensure that the general condition of the equipment is acceptable the gauntlet area, See Fig. Consistent ozone cutting and checking during the test 6. Immerse the sleeve in water and 7. Particular care should be taken to avoid any sharp folds in the sleeves as they may cause 7.
Fill the gloves, right side out, with NOTE 5—Use of this method may result in excessive breakdown failures when tested above 10 V ac or 50 V dc if the test conductive, clean water and immerse to a depth in compliance apparatus does not conform with 7.
The water level during the test shall be the same inside and outside the gloves. The pipe or rod should be of sufficient weight to hold the high-voltage source. The water should be free of air bubbles sleeve down to prevent creasing and its length should be no and air pockets inside or outside the glove and the exposed less than the width of the sleeve.
Immerse the sleeve in water portion of the glove above the water line shall be dry. If the proof test current is in and underarm edges are equidistant above the water line as excess of these limits, the glove shall be rejected. Particular care should be taken to avoid any sharp folds in the sleeves as they NOTE 4—For further details on recommended equipment and may cause premature dielectric breakdown at these points.
Seven area, the top of the underarm, and the cuff edge are all in a methods of mounting sleeves are described in the following horizontal plane, parallel to the surface of the water in the test sections, with test limitations on some of the methods. Both ac and dc proof-test procedures are included in this section.
In each of the six test methods, the inner and outer electrodes shall be connected to the opposite terminals of the high-voltage source. Electrode to electrode clearances shall be as specified in Table 3. In those cases where atmospheric conditions make the specified clearances impractical, the distance may be increased by the maximum of 51 mm 2 in.
Place a layer of high dielectric strength liquid, having a specific gravity greater than 1. Then fill the tank with water to the desired level. Immerse the sleeve, with the cuff end first, into the water until the cuff end is below the interface between the two liquids, to a depth required to provide the flashover clearance shown in Table 3.
The dielectric liquid separates and electrically insulates the inside water electrode from the outside water electrode. This mounting may be used for all voltages, both ac and dc. NOTE 6—Some dielectric liquids are toxic in nature and therefore proper precautionary measures shall be followed. One satisfactory dielec- tric liquid is trichlorotrifluoroethane Dielectric Grade. The rubber sleeve FIG.
Repeated testing may result in loss of dielectric tank see Fig. The test equipment holding or supporting the strength due to water dielectric mixing, so separation time or other means sleeve under test should be of such design that there is minimal may be needed.
Care should be taken to prevent the sleeves from folding stress created in the sleeve material. Place a rod or pipe across back out of the dielectric liquid. Hanger systems may be obtained from the top surface of the sleeve at approximately the midpoint most test equipment manufacturers to facilitate the hammock mounting between the cuff and underarm edge.
The pipe or rod shall be method. This device shall provide a tight, leakproof seal at the the sleeve. Fill the sleeve with water and immerse the sleeve to cuff and a high dielectric medium to separate and electrically the test position, allowing for proper flashover clearance for the isolate the inside water electrode from the outside water test voltage used.
In so far as practical, the water levels should electrode. The sleeve to be tested is then filled with water to be the same both on the inside and outside of the sleeve, and meet the clearance requirements of Table 3. The test arrange- the top of the shoulder area, the top of the underarm, and the ment shall provide that the sleeve stay essentially straight. This cuff edge are equidistant above the water line see Fig. Particular care shall be taken to avoid any sharp folds or areas of stress in the sleeve, as they may cause premature dielectric breakdown or ozone cutting, or both, at these points see Note 5.
For versatility in testing electrodes and masking may be used to retest sleeves as in Fig. Use a grounded plate as the table. Place a 3. This method should not be used for ac testing of thick wet sponge or wet felt in the hole as the ground contact.
Type I sleeves because of potential ozone generation. Place a second 3. Place a mm 2. This inside sponge 7. Then place the a sinusoidal wave over the upper half of the range of the test sleeve encasing the sponge in position on the wet felt or sponge voltage. Place an ozone-resistant 7. Cutouts and electrodes can be made in multiples to test voltmeter used in conjunction with a calibrated instrument more than one sleeve at a time See 7. To ensure the continued the electrodes consist of two electrically conductive plates or accuracy of the test voltage, as indicated by the test equipment shapes, constructed to conform closely to the inside and voltmeter, calibrate the test equipment at least annually, in outside of the sleeve.
Round any edges on these shapes so as to accordance with Practice D Draw the sleeve 7. It is recommended that the voltage be measured by the use of a dc meter connected in series with appropriate high-voltage-type resistors across the high-voltage circuit. The accuracy of the voltage-measuring circuit shall be within 61 kV of the test voltage.
Calibrate the test equipment at least annually, in accordance with Practice D Start the be used but returned to an electrical testing facility for test period at the instant that the prescribed testing voltage is inspection and retest. Gloves or sleeves shall not be bundled reached. Unless an electrical puncture has already by the wearer for defects. Gloves shall be air-tested before use occurred, the applied voltage should be reduced to at least half value at the each day and at other times if there is cause to suspect any.
They shall be inspected over the entire surface and defects that affect their ability to give mechanical protection to shall be rolled gently between the hands to expose defects and the insulating gloves. Care should be exercised to keep the imbedded materials.
Protector gloves that become contaminated with inju- entrapped inside the glove, or by using a mechanical inflator. The glove shall be examined for punctures and other they have been thoroughly cleansed of the contaminating defects.
Puncture detection may be enhanced by listening for substance. Under twice the normal size. Type II—No part of the glove or sleeve shall be stretched more than the same conditions, Class 00 gloves may be used without 1. Other classes of gloves may be used without grease, or other damaging substances as soon as practicable.
Excess water should be removed by being shaken out and the voltage exposure. Rubber insulating gloves that have been used article then air dried.
The frequency of this inspection shall be at intervals warmth in cold weather and to absorb perspiration in hot of not more than six months. The location shall be as free as adhesive tapes or labels applied to them by other than practicable from ozone, chemicals, oils, solvents, damaging authorized personnel.
Gloves shall be stored in their natural shape. Gloves shall not be used and shall be returned to an electrical testing may be kept inside of protectors or in a bag, box, or container facility for inspection and electrical retest: that is designed for and used exclusively for them.
Gloves and 8. Sleeves may be loosely rolled lengthwise inside 8. Rejection damage, except as provided in 8. Protector dance with Section Minor surface corona cutting or ozone gloves shall not be used if they have holes, tears, or other checking in the gauntlet area, above the water line, need not be cause for rejection.
Repairs Class mm in. Repairs shall not be made on top of previous. Patches and blemish repairs to No more than specify the test voltage for each class of glove to be tested or three patches shall be applied to one glove or sleeve.
A date specified as test or retest shall be either recorded or provided by The marking reinspected and retested in accordance with Sections 7 and 9. Any suitable for electrical service shall be defaced, cut, or otherwise adopted repair method should be able to pass the physical and chemical tests in accordance with Section 19 of Specification D Record-Keeping and Marking Keywords ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
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