Power Quality Analyzers with Fault Recorder Function

Extremely robust and reliable

The mobile network analyzer

The PQ-Box family consists of powerful, portable network and frequency analyzers, power measurement devices and transient recorders.

During their development, user-friendliness and practical considerations were the key concern. To quickly locate the cause of network errors, the devices are fitted with a wide range of trigger options.

All mobile network analyzers fulfil the high demands of IP65 and can also be installed and used outside. They also have a large operating temperature range of – 20°C to + 60°C.

And they fulfil every requirement of the measurement devices standards IEC61000-4-30 Ed.3, IEC62586-1 and IEC62586-2 Ed.2 for class A devices.

The right box for every frequency

Our mobile analyzers

Today’s devices and equipment such as switched-mode power supplies, frequency converters, controlled drives, charging devices for e-mobiles or LED lighting, work internally with high clock frequencies and power to be controlled efficiently. These can lead to both line-bound and field-bound (coupled) influences in the energy grid.

Typical clock frequencies of systems and devices that we have to reckon with in our networks today:

• 4 kHz to 20 kHz: Frequency converter drive
• 16 kHz to 22 kHz: Solar inverter (400V)               
• 2 kHz to 6 kHz: Wind power plant (medium voltage grid)
• 10 kHz to 80 kHz: E-mobile
• 8 kHz to 20 kHz: Active grid filter
• 15 kHz to 25 kHz: UPS systems
• 20 kHz to 200 kHz: Electronic ballast
• 30 kHz to 300 kHz: Switching power supplies

The power analyzers from A.Eberle have a high bandwidth which is free of aliasing effects up to 170 kHz (PQ Box-300).

These devices can be used to detect the mains feedback in the super-harmonic range of solar inverters, e-mobiles and frequency converters. The IEC61000-2-2 standard already offers compatibility levels for the public grid of up to 150 kHz. These limit values are already stored in our measurement technology.