General
Power supply types	TT / TN-S system
Rated voltage	200–480 VAC
Rated frequency	50 Hz
Rated current	≤125 A
Power supply	24 V AC/DC
Power loss	<15 W
Compensation frequency	150, 450, 750, 1050 Hz
Compensation current	max. 500 mA RMS
Degree of protection	IP20
Mounting	DIN EN 50022 mounting rail
Ambient temperature operation	+10 to +55 °C
Storage ambient temperature	-25 to +70 °C
Internal transducer	Ø 25 mm (max. 4 × 25 mm²)
Approvals	CE, RoHS
Standards	EN 61326-1, EN 55011 Kl. A Gr. 1

The leakage current compensator LEAKCOMP HP from EPA is an active device for compensating operational leakage currents in 3-phase TN networks with neutral conductor. It is specifically designed for installations where frequency converters are used and high leakage currents occur, which could impair the function of residual current circuit breakers (30 mA). By actively injecting a counter-current into the protective conductor, the leakage current is reduced, ensuring the protective function of residual current devices remains intact. The device is suitable for TT and TN-S network configurations and supports operational safety in industrial and commercial electrical installations.

Applications

The LEAKCOMP HP is used in industrial environments, particularly in installations with multiple frequency converters that generate high leakage currents. These currents arise from capacitive and inductive effects in the wiring and can trigger residual current circuit breakers, leading to unwanted shutdowns. The compensator enables the use of residual current devices with a rated tripping current of 30 mA, even if leakage currents during operation reach up to 500 mA RMS. This is especially important in production facilities where continuous power supply is essential.

Functions and Features in Detail

The device compensates leakage currents by injecting a counter-phase current into the protective conductor. Compensation occurs at specific frequencies: 150, 450, 750, and 1050 Hz, which are typical for harmonics generated by frequency converters. The maximum compensation capacity is 500 mA RMS. The internal current transformer arrangement allows measurement of up to four conductors, with a maximum cross-section of 25 mm² per conductor. Mounting is done on the DIN EN 50022 support rail, enabling standardized installation in enclosures.

Technology Explained Simply

The leakage current compensator operates with a supply voltage of 24 V AC/DC, consuming 0.5 A. The device’s power loss is less than 15 W, resulting in low thermal load on the surrounding environment. The rated voltage is 200–480 VAC (±10%) at a rated frequency of 50 Hz (±1%). The device is designed for a rated current of up to 125 A. The protection rating IP20 safeguards against finger contact and solid foreign objects, but is not suitable for outdoor use or humid environments. The operating ambient temperature ranges from +10 °C to +55 °C, while the storage temperature ranges from −25 °C to +70 °C.

Compatibility and Accessories

The device is designed for 3-phase TN networks with neutral conductor and can be used in TT and TN-S systems. It complies with standards EN 61326-1 and EN 55011 Class A Group 1, ensuring electromagnetic compatibility and emissions control in industrial environments. The CE and RoHS certifications confirm compliance with European safety and environmental regulations.

Mounting and Installation

Mounting is performed on the DIN EN 50022 support rail, commonly found in standardized enclosures. Installation requires correct connection of conductors to the current transformers, with a maximum conductor cross-section of 25 mm². The ambient temperature during operation must remain between +10 °C and +55 °C to ensure proper functionality.

Operational Advantages

By compensating leakage currents, the reliability of residual current devices in installations with frequency converters is enhanced. This prevents unwanted shutdowns and ensures continuous power supply. The low power loss and compact design (91 × 89 × 59 mm) allow efficient use of space in enclosures. Compliance with the mentioned standards and certifications ensures adherence to technical and legal requirements in industry.