Withstand testing of dielectric gloves, boots, blankets, rods and voltage detectors up to class 4
Testing several pairs of dielectric gloves or boots at once and knowing exactly which one fails calls for a withstand test system that reads the leakage current of every position separately and cuts the high voltage only on the failed one. The AHZAQ is a 10 kVA / 100 kV system with an 8-position bath that measures the leakage current of each position up to 25.0 mA, with 0.1 mA resolution and < 1% ± 1 digit error, disconnects the high voltage channel by channel and tests gloves of class 00 to 4 and boots, sleeves and blankets of class 0 to 4 to ASTM D120, ASTM F496 and IEC 60903; it stores 60 records and prints the report on site.
AHZAQ key data
- Power and voltage: the AHZAQ is rated 10 kVA, with an interchangeable 50 kV / 200 mA or 100 kV / 100 mA voltage-raising transformer, both with 220 V input.
- Test bath: 8 positions (eight pairs of gloves or boots) tested and read out simultaneously and independently, with a maximum working voltage of 50 kV for the class 4 test.
- Leakage current: up to 25.0 mA per position, with 0.1 mA resolution and < 1% ± 1 digit error.
- Measurement accuracy: voltage error < 1% of U + 0.5% of full scale and current error < 0.5% of I + 0.5% of full scale; 100 kV high-voltage divider with 1.5% accuracy.
- Safety: patented infrared link isolating the console from the high-voltage circuit, independent disconnect per channel, over-voltage and over-current protection, 5 kΩ protection resistor and high-voltage hazard warning light.
- Automation and reports: ramp-up, hold, ramp-down and power-off run unattended; LCD showing the eight leakage currents, test voltage, test current and timer at the same time; 60 records and built-in high-speed printer.
- Optional accessories: 100 kV insulating-rod bracket with 8 stations (whole-length test for 35 kV rods and segment testing up to 110 kV), 100 kV insulating-pad and clothing test bench with an 1800 × 1000 mm working area and motorised stand for capacitive voltage detectors up to 35 kV.
- Mounting: the AHZAQ set (control desk, bath, transformer, divider and protection resistor) can be trailer-mounted for on-site testing.
A complete test system
Designed for acceptance and periodic testing of electrical-safety equipment, the test bath holds eight pairs of boots or gloves at once and reads the leakage current of every position separately, while an infrared link keeps the control console fully isolated from the high-voltage side. The system is completed with a control desk, a 10 kVA voltage-raising transformer (50 kV or 100 kV version), a high-voltage divider and a protection resistor. The whole set can be trailer-mounted for on-site work at remote locations.
Items tested, by class
- Dielectric gloves: classes 00 to 4.
- Dielectric boots: classes 0 to 4.
- Dielectric sleeves: classes 0 to 4.
- Blankets, mats and covers: classes 0 to 4.
- Insulated tools and other electrical equipment.
- Hot sticks up to 4 m, tested at 100 kV every 300 mm.
- Capacitive voltage detectors of 35 kV and below.
Control, automation and reports
The withstand test — ramp-up, hold, ramp-down and power-off — runs unattended once started, with an independent high-voltage disconnect per channel, so a single fault does not stop the other seven tests. A large LCD on the console shows the eight leakage currents together with the test voltage, the test current and the timer, all at the same time. The system stores 60 test records and prints on-site reports on the built-in high-speed printer, with over-voltage and over-current protection and a high-voltage hazard warning light.
Technical specifications
| Rated capacity | 10 kVA |
| Output voltage | Up to 100 kV, according to the transformer fitted (50 kV or 100 kV) |
| Bath positions | 8, tested and read out simultaneously and independently |
| Leakage-current range | Up to 25.0 mA, 0.1 mA resolution |
| High-voltage divider | 100 kV rated, 1.5% accuracy |
| Protection resistor | 5 kΩ, 100 mA / 100 kV maximum |
| Test records | 60, with on-site printing |
| Standards | ASTM D120, ASTM F496, IEC 60903 |
| Test transformers | 50 kV / 200 mA or 100 kV / 100 mA; 10 kVA; 220 V input |
| Measurement error | Voltage < 1% of U + 0.5% FS; current < 0.5% of I + 0.5% FS; leakage current < 1% ± 1 digit |
| Maximum bath working voltage | 50 kV (class 4 test) |
Frequently asked questions
How accurately does the AHZAQ measure the leakage current of each glove?
Each of the 8 bath positions of the AHZAQ reads leakage current up to 25.0 mA, with 0.1 mA resolution and < 1% ± 1 digit error. The console LCD shows the eight currents at the same time, together with the test voltage, the test current and the timer.
What is needed to test blankets and insulating clothing with the AHZAQ?
The optional insulating-pad test bench, rated 100 kV with an 1800 × 1000 mm working area, embedded central grounding electrode, stainless-steel test electrodes and casters, together with the electrode sets for sleeves, chest, trousers and blankets. Insulated tools, by contrast, are tested with the AHZAQ base set and need no additional accessory.
How many items does the AHZAQ test at once?
Eight, either pairs of gloves or of boots, each with its own leakage-current reading.
What is the maximum test voltage?
Up to 100 kV, by fitting the transformer of that version; the 50 kV version covers the lower-voltage tests.
Can it test rods and voltage detectors?
Yes, with the optional accessories: the rod bracket, up to 110 kV by segments, and the voltage-detector stand for capacitive detectors up to 35 kV.
What protects the operator during the test?
The infrared link that isolates the console from the high-voltage circuit, the independent disconnect per channel and the over-voltage and over-current protections.
