DE630094C - Circuit for interrupting a control circuit and restarting it after an adjustable time with the help of two installation circuit breakers - Google Patents

Description

GERMAN EMPIRE

ISSUED ON
May 20, 1936

REICH PATENT OFFICE

PATENT LETTERING

CLASS 21c GROUP 68 oi

Stotz contact G. m. B. H. in Mannheim-Neckarau

Patented in the German Empire on March 18, 1933

It is often necessary to have a secondary circuit depending on a main stream to open or close and according to an adjustable, i.e. changeable, if possible Time to close or open this branch circuit again. E.g. it is required that when responding to a consumer device protecting overcurrent scarf ters a signaling device is made to respond and the initiator Control circuit only closed or opened for a short, adjustable time shall be. The invention relates to a circuit with very simple means solves this problem, it being with reference to the above-mentioned example of the invention It is irrelevant for what purposes the control circuit or the circuit switched in it Apparatus is used.

ao Overcurrent switches are already known in which auxiliary contacts are also used with the interruption contacts of the main circuit can be switched to interrupt an auxiliary circuit. The latter remains After the switch has responded, it is opened until it is switched on again. However, if the auxiliary circuit is only to be closed again after a certain period of time must, as was previously necessary, at the same time with the interruption contacts of the auxiliary circuit a delay device, for example a clockwork or a ball drain to be put into action. The invention relates to a circuit the one using two cooperating self-switches without assistance special delay devices enable the auxiliary circuit to be automatically switched on again. The first The circuit breaker serves the contactor of the power consumption system (main circuit) and is hereinafter referred to as the main switch for short; the second automatic switch is used for Control of the auxiliary circuit and is hereinafter referred to as auxiliary switch for short.

According to the invention, the main switch is provided with the usual interruption contacts for the main circuit influencing it with two further interruption points for two auxiliary circuits, one of which is opened and the other is closed when the main switch responds. The circuit for interrupting the circuit and switching it on again after an adjustable time is characterized by two alternating open circuits, in the first of which the device to be controlled and a secondary interruption point of the main switch, in the further one apart from a resistor thermal triggering means of the auxiliary switch are, whose second breakpoint commands a bypass line parallel to the first lying in the open circuit position of the main switch, wherein j DES sen closed interruption point of

the auxiliary switch, one interruption point is also closed and the other interruption point is open. The circuit can be designed, depending on whether the S ^ Ä apparatus is with idle or working current, so that the closed main break main switch, its secondary break in the control circuit and the break in the second circuit of the auxiliary switch are also closed, with the in The second circuit break point of the main switch and the break point of the auxiliary switch in the bridging line are open, or the circuit is reversed, in such a way that when the main break point of the main switch is closed, its secondary break point in the control circuit and the break point in the second circuit Auxiliary switch are open, the other interruption points are closed. The circuit is shown schematically in the drawing. Of the two automatic switches a, % the first protects the power consumption system (power consumer j) against overload and short circuit, the second automatic switch% is the auxiliary switch and is used for control purposes. Both switches a, a _t are equipped with magnetic coils b, b _x and thermal tripping means c , C _{1. In} addition to the usual interruption points d, d _t , both switches have auxiliary interruption points e, e _v. In addition, the main switch a is equipped with a further interruption point /. The current bridges carrying the contacts are on common rods g-, ^ ₁ arranged the interruption point e of the main switch α containing electricity circular xx is-via the main interrupt point (J ₁ of the auxiliary switch O _1, the thermal:... triggering element C _1, the solenoid coil Zj ₁ and _a; performed adjustable resistor h the auxiliary interruption points /. of the main switch a- and e _{± of} the auxiliary _{switch O 1} containing circuits yy and zz are par switched allele and act on the electrical control apparatus.

The mode of operation of the circuit is as follows.

■ If the main switch α ζ. Β. -brought to tripping as a result of a short circuit, the auxiliary interruption point e is closed and the auxiliary interruption point / is opened. As a result, the circuit yy is interrupted and the control unit j switched off. In addition, the circuit xx is closed (interruption point), so that the auxiliary switch O _x responds. y. _'IE) ie response time depends on the adjustment of the resistance is, it is so by the resistance i-pihderung regulated. If the auxiliary switch a _t then responds, the auxiliary interruption point e _{t is} closed and the control apparatus i is switched on again as a result. The two switches a, U ₁ are returned to their initial position by operating the usual switch handle.

The circuit can, as already said and indicated in dashed lines, also be executed in such a way that the interruption point / of the main switch o are open and the interruption point e _{x of} the auxiliary switch a _{x are} closed and the Circuit for the control apparatus i via the series interruption points / and e _t is performed. The control apparatus i is then switched on when the main switch α responds and switched off again after the adjustable time.

Claims (1)

Claim: Circuit - for the interruption of a control circuit - and reconnection of the same after an adjustable time with the help of two installation self-switches, of which the main switch has three interruption points, one of which, together with the tripping device of this switch, is in the circuit of a consumer to be monitored by this, while the auxiliary switch has two Has interruption points, characterized by two alternately open circuits (y, x), in the first (y) of which the device to be controlled (i) and a secondary interruption point (f) of the main switch (α), in the other (λ) apart from one resistance (&), the second Nebenunterbreehungsstelle (s) of the main switch (α ·) and an interrupt point ((Z ₁₎ together with the thermal tripping means (C ₁₎ of the auxiliary switch (%) are, the second interruption point (e _t) is a bypass line (2 ) parallel to the interruption point (/) of the main shell in the first circuit (y) ters (a) , when the interruption point (/) of the auxiliary switch (%) is closed, the interruption point ((I ₁ ) is also closed and the interruption point (e _x ) is open. For this purpose ϊ sheet of drawings