TECHNICAL FIELD

The invention relates to electrical installation equipment, and more specifically to an input connector provided with residual current detection means and where this is adapted for electric vehicles equipment.

BACKGROUND

Electrical vehicles have become increasingly popular and as such, there is a range of different electric equipment available on the market. This range from charging solutions for charging batteries of electric vehicles to electric equipment installed in the vehicles.

Residual current devices (RCDs) are typically used in electrical installations in homes to protect against risks such as electric shock and fires. When activated, electrical power supplied to a specific fuse will be cut off. Activation occurs when leakage of electrical current to ground is detected.

Residual current detection is also a vital part of the equipment related to electric vehicles. Known systems measure residual current by passing power input phases through a sensor. Such solutions do however add a significant amount of power loss and possibly also contribute to the complexity of assemblies.

The present invention addresses this problem. A solution with minimal power loss is provided by means of the constructional features of an input connector with an integrated RCD sensor. The solution enables easy assembly and the input connector has minimal size.

SUMMARY

The invention is defined by an input connector assembly for detecting residual current and adapted for connecting power sources to electric equipment of electric vehicles, comprising a wire terminal block with wire terminals for receiving electrical wires, lock and release mechanism connected to the wire terminal block for fixing electrical wires to conductors in the wire terminals.

The input connector assembly further comprises a residual current sensor adapted to be mounted to a flat surface and a support holder designed to be placed above the residual current sensor and to be connected to the flat surface, and were the support holder is further adapted for supporting the wire terminal block in a position above the residual current sensor, and where conducting connection pins runs from the conductors in the wire terminals through openings in the residual current sensor to the flat surface.

Further characteristics of the invention are defined in the claims.

DETAILED DESCRIPTION

The invention will now be described with reference to the figures.

Figure 1 is a perspective view of a front side of an input connector assembly according to the invention.

Figure 2 is a perspective view of a back side of an input connector assembly according to the invention.

Figure 3 is a perspective view of a bottom side of an input connector assembly according to the invention.

Figure 4 is a side view showing details of an input connector assembly according to the invention.

Figures 1 and 2 show front and back sides of the input connector assembly 100. The figures show the different parts making the connector assembly 100 and how the parts are connected relative to and to each other for detecting residual current from wires connected to wire terminals 130 of a wire terminal block 110. Each wire terminal 130 is provided with a lock and release mechanism 120, typically a handle, connected to the wire terminal block 110 for fixing electrical wires to conductors in the wire terminals 130.

A residual current sensor 150 is connected to a flat surface 160, typically a printed circuit board (PCB). A support holder 140 having a hollow design enabling it to be positioned above the residual current sensor 150 as shown in the figures. The support holder 140 is also connected to the same flat surface 160. The top of the support holder is adapted to support the wire terminal block 110. The residual current sensor 150, support holder 140 and the wire terminal block 110 will thus be placed above each other. Conducting connection pins 170 run from the conductors in the wire terminals 130 through openings in the residual current sensor 150 to the flat surface.

This compact construction of the input connector assembly 100 makes it possible to detect residual current between conductors without connecting a residual current detector directly to the wires conducting power.

In one embodiment of the invention, the input connector assembly 100 further comprises a distribution circuit board 180 adapted for distribution of connectors running from the wire terminals 130 to respective openings in the current sensor 150.

Figure 3 shows a bottom side of an input connector assembly according to the invention. This figure illustrates how the support holder 140 is connected to the flat surface 140, e.g. by connecting the conducting connection pins 170 to a PCB by using press-fit or soldering or a combination of these techniques.

Figure 4 shows details of an input connector assembly, where the conducting connection pins 170 run from the distribution circuit board 180 through the flat surface, e.g. to corresponding conductors of the PCB. As understood from the above, the invention provides a compact input connector assembly for detecting residual currents. The construction is easy to assemble, has minimal size. The assembly can be built by robots, thereby minimizing assembly costs. In addition, the total power loss is kept as low as possible by using few parts in the current carrying path.