DE663735C - Circuit arrangement for alarm systems, in particular fire alarm systems - Google Patents

Description

Circuit arrangement for alarm systems, in particular fire alarm systems Addition to patent 633 763 The main patent relates to a circuit arrangement for Alarm systems, in particular fire alarm systems, with arranged in several individual loops Alarm orders (automatic or push-button alarms), from which messages about a common main loop to several receiving devices provided in a control center are transmitted and in which a relay arrangement is provided through which the calling loop with a ready-to-receive 1mpfangseinrichtung the control center is connected in free choice, expediently after occupancy of all receiving facilities prevents the transmission of further alarms until a receiving device becomes free will. With this known arrangement there were two with the detector loops in the control center directly connected relays required, their dropping out at different Current levels were used to display messages or wire breaks.

The invention improves the arrangement of the main patent in that in the control center only one with the detector loops in direct connection provides standing relay, when it drops out via a free selector of each The present operating case, for example a message or wire break, is indicated will.

Instead of two monitoring relays that drop out at different current levels only one monitoring relay is required for the same purpose.

The main advantage resulting from this simplification is in the fact that with the same operational safety and sensitivity of the monitoring the number of individual loops per main loop and thus the number of individual loops arranged Alarm signals or with the same number of individual loops whose line resistance can be multiplied.

Checking has also been improved. For dimensioning the test relay this & new proposal is no longer the maximum resistance of all in the Main loop series-connected loops for reliable response take into account only the resistance of a single loop. Also from this Basically, the line resistance of each individual loop can be increased many times over and thus the capacity of the entire alarm system.

Simultaneous use of the test relay is also advantageous as a switch relay for the examining voter as well as the further use of this Relays for the same purposes for one or more other test selections after setting of the previously associated with him.

Another advantage is that the revision notifications are made in a simpler way Can be carried out in a manner without endangering the recording of messages will. The auditor's call is made by loop power interruption, which acts like a broken wire. There are therefore special call lamps in the control center saved and shared the wire break indicator lamps. Via a telephone connection established in the process the central officer can contact the auditor, whereby the telephone system in the control center takes the place of what would otherwise be the case in the event of a wire break to restore the normal state provided short-circuit resistance occurs.

The advantages of the arrangement of the main patent, such as more secure Reception of several messages triggered simultaneously or in quick succession, whereby expediently the transmission of further alarms after all receiving devices have been assigned until a receiving device becomes free remain unchanged.

Further details of the invention emerge from the following Description. On the basis of the circuit arrangement shown in the figure, a Embodiment described for the invention.

S1 to S25 are individual loops with automatic fire alarms A and push-button alarms B. These individual loops are connected to a common main loop and connected in series with the monitoring relay 1 = I. In addition, latches Kt, to K125 are provided on the individual loops; into which the test plugs PSt or short-circuit plugs KSt shown in the figure at the top right are inserted for the purpose of testing or switching off a disturbed loop. W1 and TV are the electromagnets of the selector that starts up when the monitoring relay responds in free choice with the contact arms w12, zvl, or w22, zel2 (and the rotary contacts zulx, iüi, or w2x, which are actuated once for each rotary step The a- and b-contact arms of the selectors TV, and TV, slide over the contact segments indicated by dash-dotted lines, on whose individual contacts (ia), (2 a) and (i b), (2 b) the outputs of the Individual loops are connected in the manner shown in the figure.The meaning of the other individual parts results from the following description of the mode of operation of the arrangement.

In the event of a fire alarm, a resistor is switched into the relevant individual loop in a known manner by responding to an automatic alarm A or pressing a pushbutton alarm 13. With the resulting weakening of the current, the surveillance relay comes. Ü (-f-, Ü, k1, loops S1 to S.5, k2, w% -) to drop and closes its contact ii, whereby a. Circuit for the delay relay L '(+, r2, id, L', -) is formed. By moving the contacts of the relay T ', the test relay P in the circuit (-1-, k5, v3, contact arm ze "L, url, us, r1, wlx,' wx, P, -) to respond and issued via its contact pl your voter magnet R'1 (-f-, pz, r3, iirs, W1, -) an impulse, which results in the progression of this voter from the zero position. Rotary step opens and thereby interrupts the circuit of the test relay P which simultaneously causes the selector W1 to switch.

It is assumed that a detector has been triggered in the individual loop S25, so that when checking via the first individual loop S1 (-f-, 2u2, contact arm w "" selector contact (ia), kl ", loop S1, kll ', contact ( ib), contact arm wlz, url, v2, r1, w1., w2x, P, -) the test relay P receives enough current and picks up again , us, W1, -), which is changed when the P relay drops out: is opened again by opening the contact w1. until the test relay when P Aufprüfen over the single loop S25 as a result of these connected in single loop resistance of the activated detector no longer train to. for the purchase required current is obtained and thereby the voter is stopped.

Due to the dropout of the Ü relay and response of the TI relay, the delayed auxiliary relay K was brought in while the selector W1 was turned in the circuit (+, r2, wly, v1, winding K 'of the relay K, -), which was also brought in its contacts kl and k2 separated the common main loop from the battery and put the monitoring relay IU in a holding circuit (-E-, 7U, kl, wi, -) . The delayed releasing relay. Tl, which remains in the circuit (-I-, 7 »2, P2, y, -) during the screwing in, the test relay P drops when the selector is stopped due to non-response, whereby the circuit of the i. Winding K 'of the K relay (+, r2, k4, vl, K', -) separates at v1 and, via its contact v2, the relay Pf into a test circuit (-f-, ur2, contact arm wla, contact ( i a), k125 ', loop S2;, with detector resistor.d, kl2J, contact (ib), voter arm wiv, uri, v2, Pf, -) sets. If there is a message, the relay Pf still finds sufficient current to be able to pick up and switches on the alarm relay AL (-I-, r2, pf, Al, -) via its contact pf, which turns into a holding circuit (+ , r2, all, Al, -) and switches on alarm lamps, alarm clocks and possibly a main alarm via its contacts.

It should be noted at this point that the proposed arrangement is also intended for systems of the largest universities. It is assumed that the individual loops S1 to S2 ;, are combined to form a group i and that there are other similarly structured groups. The switching means belonging to the individual groups or common to all groups are correspondingly denoted by indices g1 and g1_. When the alarm relay is triggered, the alarm lamp AL, l_ "and the alarm clock AW, common to all groups, are brought in addition to the alarm lamp of the group i ALbl, furthermore in the circuit (+, switch FS, Rügl.n) cf._, l or hal, al "'gl_r" HA, -) the trigger relay HA' for the main indicator H, 11.

By plugging the short-circuit plug KSt into the jack KI the disturbed loop is finally switched off after it was previously through the ur4 contact of the changeover relay UR mentioned below parallel to the disturbed single loop of the Resistance wis in the size of the single loop resistance. was switched to to prevent another voter from running.

The K relay has a longer drop-out delay than the TI relay, so that because the v1 contact is closed before the k4 contact is open, a response circuit (+, r2, k4, v1, contact arm as, contact bank w ", UR, -) comes about. The contact arms w" and w2U of the selector W2 are switched to the test device via the contacts uri and tender, so that the next response of the monitoring relay Ü starts and tests the second selector W2 Has. Play on a second message. the switching processes as described above, and the second selector also rotates via a previously mentioned individual loop, if it has been switched off by ur, contact or with the help of a plug, as a result of the response of the P relay.

The selector is reset by pressing the reset button Rü, whereby the R relay picks up with drop-out delay by switching on its first winding R 'in the circuit (+, r2, urs, Ril, R', -) and its second winding by switching the contact r2 puts into a holding circuit (-j-, r2, R ", wi, -) . The stepping of the selected selector to the zero position takes place with the help of the circuit (-E-, rl, wlx, w2x, P, -) First the P relay pulses via -f -, hl, Y3, contact arm and contact bank Wod, W2, - on the rotary selector magnet 9'2 and brings this selector to the zero position, where the progressive circuit by sliding down the 'Contact arm w, d is interrupted by the contact bank. For this, in the zero position of selector W., the switching circuit for the rotary magnet of selector W1 is closed (-, A, r3; zero position of contact arm ZP'2d; contact arm and contact bank -zo " l, W1, -), which now rotates to the zero position and interrupts the switching circuit in this position. If the P relay responds for a longer period of time and thus short-circuiting the R "winding of the R relay through contact p3, the R relay drops out and, with its contact r, interrupts the circuit of the pulse relay P.

If a wire break occurs in an individual loop, the switching processes take place as described above, and a voter adjusts himself freely to the disturbed loop. However, the relay Pf connected to the disturbed individual loop in the circuit (+, 2ar2, contact arm? Via, contact (ia), disturbed loop, contact (ib), contact arm wib, url, v2, Pf, -) cannot respond and so that the alarm relay Al and the triggering of the main detector are not brought. When the .related loop lamp SZ (+, r2, k3, contact arm w "" loop contact, loop lamp SZ, St ', -) is switched on, the fault relay St connected in series with all loop lamps responds via the first winding St' and applies its second winding St "via its contact st, into a holding circuit (-j-, r2, st, St", -), while it short-circuits its first winding with its contact st. In addition, the fault relay brings a fault alarm clock and a fault lamp. Furthermore, the telephone relay T of the relevant group is connected via the contacts st4 and cf. with its first winding Tgi in preparation to the negative pole due to the delay relay h which has dropped out and the malfunction relay St addressed.

This preparatory connection of the telephone relay takes place for the following reason. In the case of audits, the auditor should have the opportunity to speak to the central officer: For this purpose, there are handles on the detectors, into which the plug of a portable OB device is inserted. This breaks the loop current and connects the portable device to the loop through capacitors. The connection works like a wire break, and in the control center a voter runs freely on the disturbed loop and sends the wire break signal. Since the revisions are carried out at certain times, the central officer knows that a revision report is available and establishes the connection with the audit officer by removing the hook switch HU. When the receiver is lifted , the supply circuit for the Mikropkon of the control center is closed via the contact HU (+, HLTl, Mi, induction coil: elS, Da; -). The previously mentioned telephone relay T had already switched its contacts t, so M a voice connection with the detector is established (telephone Tel, ti, contact arm wib, contact [ib], calling loop with OB apparatus, contact (ia], contact arm wia , t2; Tel) By switching the hook switch contact HUI, the fault alarm clock in the circuit (+, HUl; stgl-n, SA, StW, -) was de-energized at the same time.

In the event of a brief loop current interruption, caused for example by contact shocks; also runs a voter and checks. However, since the loop current flows again when it is passed through, the selector continues to run to the zero position. In the zero position, the switching circuit for the voter is interrupted so that it is shut down. When the delay relays h and K drop out, the fault signal is brought back (-E-, r2, k4, vi, contact arm as in zero position, St "; -), whereby the fault signal relay St responds and puts it into a holding circuit via its contact st ( +, r2, sti, St ", -).

If the first voter is disturbed, for example by a broken wire on the selector coil W1 or if the selector coil is burned out or the like, an automatic switchover is provided. Parallel to the relay is the thermal contact relay Th, which is permanently switched on when the monitoring relay Ü drops out due to a message or a wire break through the contact ü of this relay (+, r2, ii, Th; -) if the selector W1 does not respond despite the P relay responding is excited. After the set time, the thermal relay closes its contact tlt. and brings about +,; t @, tlt, UR, - the Urn'-switch relay UR, which by switching its contacts the test relays P and Pf the switching operations described above according to uyl or 2tY2 to the selector arms U'2b or zz @ 2ä of the voter W2 places.

In addition to a broken wire and: Multiple ground faults, the system is also checked supervised. If an earth fault occurs in a loop, the monitoring relay also drops out U from, since it is short-circuited via .the earth connection point and the earthed contact will. This initiates the processes described above. The voter can since all loops are in order, do not check and bring in the zero position again the fault signal. When the fault relay St responds, its contact st, opened and thus the line short-circuiting the monitoring relay i'I interrupted, so that further messages are no longer affected by the earth fault can.

In the event of a brief earth fault, the same switching processes take place as with a brief wire break.

The trigger magnet H11.7 of the main detector is under closed-circuit control. When the control relay M drops out, the wire break lamp DYHM and, at the same time, the fault relay in the circuit (-r-, r2, k3, contact arm "; m, DYHH, St ', -) are brought to zero by closing the contact m. The main indicator is triggered by short-circuiting the high-resistance control relay tll AA, has, algl-n, H117, In order to avoid that the main alarm trigger coil is under continuous current until the system is reset; the short-circuit of the control relay is canceled again by an auxiliary relay.

Claims (3)

PATENT CLAIMS: i. Circuit arrangement for alarm systems, in particular fire alarm systems, with alarm devices arranged in several individual loops (automatic or push-button panels), from which messages are transmitted via a common main loop to several receiving devices provided in a control center according to patent 633 763, characterized in that the control center only one monitoring relay (Ü) that is directly connected to the detector loops is provided, and when it is triggered, the respective operating case, for example a message or a wire break, is identified via a free selector. 2. Circuit arrangement according to claim i, characterized in that the free voter adjusts to the respective individual loop in the event of a message and / or wire break and a test device (P, Pf) switches on this individual loop, which only checks the individual loop in question. 3. Circuit arrangement according to claim 2, characterized in that the. Setting the free voter to the relevant Single loop relay (P) also serves to switch the selector. d .. Circuit arrangement according to Claim 2 or 3, characterized in that the testing device contains only one signal relay (Pf), which after setting the selector in the event of a Message responds, but not in the event of a wire break. 5. Circuit arrangement according to claim 2, characterized in that in the event of a long and / or short-term earth fault in the Individual loops or the common main loop likewise claim i said relay responds and by means of the free selector a display of this fault takes place and the short-circuit of the monitoring relay caused by the fault is canceled confuses. 6. Circuit arrangement according to claim i, characterized in that class for Establishing a telephone connection to the control center a portable OB apparatus connected to the connected loops and the call to the control center by interruption the loop current is effected.