Pressure trip unit for an electrical switch and electrical switch with such a pressure trip unit

A pressure trip unit for an electrical switch, comprising:

• an actuating element;
• at least one flow channel, each at least one flow channel respectively corresponding to each of at least one electrical pole of the electrical switch,
• wherein each at least one pole of the electrical switch includes at least two switching contacts for making or disconnecting a flow path,
• wherein the at least two switching contacts of each at least one pole of the electrical switch are disconnectable via the actuating element, the actuating element being configured to respond to a pressure generated in a disconnection zone of each respective switching contact of the at least two switching contacts by an electric arc drawn in an event of an electrodynamic recoil of each of the at least two switching contacts,
• wherein the disconnection zone of each respective switching contact is connectable to the actuating element via the at least one flow channel, the at least one flow channel including a non-return valve to permit a flow only from the disconnection zone in a direction of the actuating element, and
• wherein the non-return valve of the at least one flow channel includes a tongue, the tongue, in an inoperative state, covering the at least one flow channel and the tongue, in an event of pressure in an associated disconnection zone, being configured to open up the at least one flow channel;
• and
• a housing, including a first housing part and a second housing part, the tongue being held between the first housing part and the second housing part, and the tongue being manufactured from aramid, wherein the pressure trip unit is constructed modularly from
• at least two valve elements, each respective valve element of the at least two valve elements including a respective nonreturn valve and a respective flow channel;
• and
• a tripping element including the actuating element, the at least two valve elements and the tripping element being designed to be pluggable together.

A pressure trip unit for an electrical switch, comprising:

• an actuating element;
• and
• at least one flow channel, each at least one flow channel respectively corresponding to each of at least one electrical pole of the electrical switch,
• wherein each at least one pole of the electrical switch includes at least two switching contacts for making or disconnecting a flow path,
• wherein the at least two switching contacts of each at least one pole of the electrical switch are disconnectable via the actuating element, the actuating element being configured to respond to a pressure generated in a disconnection zone of each respective switching contact of the at least two switching contacts by an electric arc drawn in an event of an electrodynamic recoil of each of the at least two switching contacts,
• wherein the disconnection zone of each respective switching contact is connectable to the actuating element via the at least one flow channel, the at least one flow channel including a non-return valve to permit a flow only from the disconnection zone in a direction of the actuating element, and
• wherein the pressure trip unit is constructed modularly from
• at least two valve elements, each respective valve element of the at least two valve elements including a respective non-return valve and a respective flow channel;
• and
• a tripping element including the actuating element, the at least two valve elements and the tripping element being designed to be pluggable together.