Video: AHZAQ – Product

Video transcript

How the AHZAQ tests the dielectric protective equipment that stands between a line worker and the voltage, what it tests, how eight items are tested at once, and how the operator stays out of the high-voltage circuit. Gloves, boots, sleeves and blankets are the last barrier between a person and a live conductor. Rubber ages, cracks and gets punctured, often invisibly. That is why the standards require each item to pass a withstand test before use and at regular intervals.

ASTM D120 and F496 and IEC 60903. The AHZAQ is a complete test system. The control unit drives a 10 kVA test transformer of 50 or 100 kV, a protection resistor and a high-voltage divider sit in the high-voltage circuit, and the test bath holds eight items and measures the leakage current of each one. In figures, 10 kVA, up to 100 kV, eight items at a time, and leakage current measured up to 25 mA with a resolution of 0.1. 60 test records are stored and printed on site.

covers all standard rubber goods, up to class 4, gloves from class 00, boots, sleeves, blankets, mats, and covers. With its accessories, it also tests insulated tools, hot sticks up to 4 meters at 100 kV every 300 mm, and capacitive voltage detectors of 35 kV and below. test bath takes eight pairs of boots or gloves at once. Each position has its own leakage current measurement and its own high-voltage disconnect.

If one item breaks down, only that position is cut off and the other seven tests go on. 100 kV demands a safe design. The control console is isolated from the high-voltage system by an infrared link, so no conductor connects the operator to the test circuit. Over-voltage and over-current cut the test. A warning light shows when high-voltage is present, and a dedicated earthing container comes with the bath.

On the control unit, the low-voltage output to the test transformer, the measurement inputs, and the earth terminal along the top. The warning light tower, red and green. A large display with the eight leakage currents, the voltage, the current, and the timer at the same time, the built-in printer, and the keys to step the voltage up, step it down, or stop. The withstand test runs by itself. Once started, the unit switches on and raises the voltage at the set rate.

At the test voltage, it starts the timer and holds. When the time is up, it brings the voltage back to zero, switches off, and shows and saves the leakage current of every item. voltage comes from a gas-insulated test transformer of 10 kVA, fed at 220 volts. The 50 kilovolt version gives 200 milliamps and covers rubber goods up to class 4. The 100 kilovolt version gives 100 milliamps for hot sticks and the highest tests. Optional fixtures extend it beyond gloves and boots.

A remote control bracket tests hot sticks, hole up to 35 kilovolts or in segments up to 110. A bench with stainless electrodes and an embedded earth electrode test blankets, mats, and insulating clothing. And a stand with a spherical electrode test capacitive voltage detectors. Every test leaves a record. Test voltage, current, time, and the leakage current of each of the eight positions. 60 records stay in memory, and the built-in printer gives the report on the spot, ready to file with the equipment.

This is a test system of the same family in the laboratory. Transformer, divider, and the eight-position bath, driven from the control desk. Its place is wherever dielectric protective equipment is issued and checked. Utilities and their contractors, substation and line maintenance crews, rubber goods test laboratories, and mobile test services that bring the trailer to remote sites. The essentials. 10 kVA, 50 or 100 kilovolts, eight positions, up to 25 milliamps of leakage current, and 60 records with on-site printing.

Dielectric testing from Amperis.