Superimposed switch type A - HI, 2P, 25A, 30mA. Suitable for the domestic, tertiary and industrial sectors.

The superimmunized differentials incorporate filters of high fractures that avoid untimely firings in the presence of nonlinear loads (electronics), as well as a circuit of accumulation of energy against the untimely shots caused by transient impulses.

Specifications:

• Built according to UNE-EN 61008-1
• Closing and cutting power of 1.5 kA
• Rated conditional short-circuit current Inc according to EN 61008-1 of 6kA
• Connection section in flexible cable of 16 mm² and rigid cable for the control of 25 mm²
• Rated operating voltage in alternating 230 V

The HAGER modular range allows the combination of protection switchgear (circuit breakers, differentials, ...) and modular switchgear (contactors, relays, ...) with a uniform, ergonomic and functional aesthetics of easy installation and clear product identification thanks to the Label holder, which allows to insert texts and images for the correct signaling of the circuits.

Reference. HAGER CDH225M

How do superimmunized differentials work?

For a differential to jump, the difference between the phase output current and the neutral input current must exceed 30 or 300 milliamps (depending on the differential), which automatically causes the entire electrical circuit to be disconnected. The superimmunized differential manages to avoid these false shots, so that it only jumps when there is a real threat.

As it does? Thanks to the high-frequency filters that it incorporates, the superimmunized differential can distinguish earth faults from a false alarm caused, for example, by lighting with fluorescent tubes. These filters are, in fact, capacitors connected to ground through which permanent leakage currents circulate at 50 hertz, between 0.3 and 1.5 milliamps per device (may vary depending on the type of receiver).

If the sum of permanent leaks reaches 35 percent of the sensitivity of the differential, any small overvoltage -such as that caused by turning on several computers at the same time- can cause a nuisance trip.

For all these reasons, experts recommend installing a superimmunized differential in those installations in which the differential trips too frequently without just cause.