Filkab: NOARK's Ex9JP-G relay protection is changing the way RES facilities are safe

2025-11-203 min.

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The expansion of photovoltaic capacities in Bulgaria goes hand in hand with new, even stricter requirements for safety, stability and integration into the electricity grid. The Energy Act, Ordinance No. 6 on the connection of producers and consumers to the electricity transmission and distribution networks, as well as the requirements of the EDC companies set clear rules for protection against surges, phase drops and instability in the system. NOARK's Ex9JP-G, offered by Filkab, is positioned as an integrated solution for the control and protection of photovoltaic systems. "The Ex9JP-G combines several security features in one device, allowing for precise adjustment to the specific standards of each country. This is especially important for investors who are implementing projects both in Bulgaria and internationally," Filkab commented to BalkanEngineer.com.

Technical profile: protection and control in one device

NOARK's Ex9JP-G relay protection has been developed for monitoring and protecting circuits connected to the power grid, with its main application being in photovoltaic systems. The device measures the voltage of each individual phase and reacts to deviations. This means that it can break the circuit or signal an emergency before it becomes a serious problem.

Among its main capabilities are protection against three-phase and single-phase overvoltage, as well as against low voltage; identification of unbalanced phases; control of the correct phase sequence, as well as detection of a dropped phase.

The technical parameters also emphasize the versatility of the Ex9JP-G: nominal control power supply from 110–230 V AC at 50 or 60 Hz, the ability to measure both AC and DC voltages, three contact outputs for integration with other systems, as well as compact dimensions — width 106.3 mm, height 62.4 mm and depth 62 mm. ensuring stable installation and reliable contact during operation.

"The big advantage of the Ex9JP-G is that it combines several basic security features in one device and can be adjusted to specific standards and requirements," Filkab explained.

You can read the entire material in Engineer.bg HERE.