How do you find a leak?

Locating and measuring leaks. The most common method for locating leaks is to scan them with a sniffer probe attached to the inlet of the leak detector, paying special attention to areas prone to leaks, such as welds, seams, seals, or feedthroughs.

How to measure leakage current?

It is recommended to measure the leakage current for every newly installed machine. The simplest method for doing so is to measure the current on the ground conductor with a clip-on ammeter (Fig. 4). Fig. 4: Measuring current on a ground conductor

How does a helium leak detector work?

The most common method used with parts that are pressurized is to scan them with a sniffer probe attached to the inlet of the leak detector, paying special attention to areas prone to leaks such as welds, seams, seals, or feedthroughs. When a leak is encountered, helium is captured through the probe and detected by the sensor.

How do Agilent leak detectors work?

Agilent leak detectors may be used in any of several ways to find or measure leaks. When a leak is encountered, helium is captured through the probe and detected by the sensor. Leak sites are identified quickly thanks to fast response time. In this configuration, a cumulative leak rate can be determined quickly and accurately.

What is a leakage current?

The term leakage current refers to current that flows to ground in a properly operating circuit or to an external conductive component. In other words, the current does not return through the neutral conductor. The same holds true for a fault current, which arises due to defective insulation between live conductors and flows back to ground.

How much leakage current does an inverter leak?

The amount of leakage current depends on the design of a drive system, on the grid voltage, the inverter’s pulse-width modulation frequency, the length of cables and the interference filters being used. Furthermore, grid impedance and the system’s grounding concept also play an important role.