Superimmunized differential switch, 4 poles, 40 amps, 30 milliamps (4Px40Ax30mA) with 2 modules, Class A-SI. Suitable for the domestic, tertiary and industrial sector.
Specifications:
- 6 kA short-circuit resistance (breaking capacity).
- Built according to IEC 61008-1 standard.
- Connection capacity 25 mm.
- 2.0 Nm tightening torque.
- Quick installation on 35mm DIN rail (IEC 60715).
- Local status signaling.
- Protection against earth leakage, current leakage and isolation function.
- High resistance to short circuits.
- AC and type A-SI sensitivity.
- Nominal insulation voltage Ui 440V.
- Nominal impulse withstand voltage Uiamp 4kV.
- Allows the use of pin and fork type connection combs.
- Resistance of electromechanical components 4000 cycles of operation.
- Compatible with standard busbars.
- Test button "Test".
With a modern design ergonomic handle for easy maneuvering and a uniform aesthetic, the modular range WERDEN is an economical solution while professional for any installation that required the highest levels of demands.
The superinmunizados differential operation and ensure proper operation face problems that are present in the LV distribution systems, such as disturbed by lightning surges (lightning), motor starting, energisation of high power, high degree of networks components harmonic, among others.
Reference. WERDEN WE-9355
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.
The discount applied to the PVP is -70%
