FI79987B - STYRNING OCH SAEKRING FOER EN MEDELST EN FJAERRINSTAELLNINGSANORDNING (STAELLVERK) ELLER EN LOKALINSTAELLNINGSANORDNING PAOVERKBAR VAEXEL. - Google Patents

Abstract

1. Circuit arrangement for the control and protection of points operable by a remote setting equipment (FE) (signal box) or local setting equipment (DE), in which arrangement the commands are conducted in signal-technically safe manner an electronic points control circuit (WST) and an electronic points protection circuit (WSI), which are associated locally with a polyphase current points drive (WA) and by which the points drive (WA) is applied by way of a contactless polyphase current power switch (LS), current monitors (ÜW) as well as a four-core setting cable (SK) to a polyphase current mains with neutral conductor (Mp), wherein a switching-off of the drive (WA) as well as a limit position report with monitoring take place by way of motor contacts (MK) and limit position or monitoring contacts (ÜK), characterised by the following features : a) the monitor (ÜW) detects the currents in two phase lines (R, S) and the neutral conductor (Mp), couples out a high signal each time in the case of current flow and transmits bit patterns of the currents to the points control circuit (WST) and to the points protection circuit (WSI) for evaluation, b) on agreement of the bit pattern dependent on the setting of the points, i. e. on the corresponding position of the motor contacts (MK) and the limit position or monitoring contacts (ÜK) in the points drive (WA) with the predetermined target pattern in the points control circuit (WST), the points drive (WA) is stopped by this through switching-off of the polyphase current power switch (LS), c) a protective switch (SS) connected in front subsequently separates the conductors of the points drive (WA) additionally from the polyphase current mains (R, S, T, Mp) and switches the conductors over to a single-phase alternating test voltage, while the switching state of the protective switch (SS) is monitored by the points protection circuit (WS1), and d) monitoring test currents about the test voltage and the individual alternating current switches (WS) of the polyphase current power switch (LS), which are driven in an automatic test mode, are constantly sent through the points drive, while the exact position of the points is detectable in signal-technically safe manner by means of the bit pattern in that case issued from the monitor (ÜW).

Description

ι 79987

Switching device for controlling the gear unit to be operated by means of the remote control device and the local control device

The invention relates to gear control and securing, as defined in more detail in claim 1.

Gearboxes are used to adjust the path of local and long-distance rail vehicles, the position of which is now generally changed by means of electric or even hydraulic gear-shifting devices. Manual adjustment is essentially only a spare for emergency use. The reversing devices are usually controlled by control commands from the control panel at a location provided for this purpose, for example from remote equipment (hub equipment) or from local equipment nearby. Today's known modern hub devices generally operate by means of gear control devices on which signaling relays are mounted, whereby a four-wire cable is routed to each gear reversing device, along which the drive is controlled on the other hand and the gear positions are also checked or indicated. The disadvantage in this case is e.g. the limited distance (up to 6.5 km) between the hub and the gear unit, the high wear of the contacts and the space taken up by the relays, as well as the power consumption. In addition to this, which is particularly important, no directly verifiable notification of the gear position is received.

In the known, available four-wire-phase-25 road turning devices, only indirectly the positions to the right or to the left are indicated, in which case the marking takes place in the so-called using pair relays. In this case, it may be a mistake that, due to a power failure and a subsequent start-up or reversing of the gear unit position with the hand crank, the actual gear position no longer corresponds to the mark on the control panel. For this reason, one must bear the responsibility for safety in the context of these normal controls.

Fully electronic gear control has already been shown 35 (DE-P 3 219 366) and in this connection the above-mentioned disadvantages are avoided, so that gear control is performed locally on gear switches 2 79987 and this control receives control commands of the hubs reliably via communication channels. From gear control to gear shifting, there is a precise difference between the turn control on the one hand and the control function on the other. In addition to the four-wire setting cable, a six-wire end position check cable is required for this purpose. The arrangement has advantages and disadvantages. The advantages are the possibility of extending distances up to 100 km thanks to reliable data transmission and the associated 10 rationalization effect and further reduced energy consumption (no relays required). In addition, the advantages are the control of the contact protection of the operating electronics, the fault finding achieved by the addition of microelectronics and the gear position message, which can now be checked directly. The disadvantages are the 15 additional end position check cables and the fact that existing equipment cannot be equipped with the system.

It is an object of the invention to overcome the above-mentioned drawbacks and to make the existing four-wire 20-gear reversing devices usable for the microprocessor-controlled control and verification of the above-mentioned fully electronic gear control.

This object is solved according to the invention as set out in claim 1. Other embodiments of the invention are set forth in the other claims.

The invention will now be described with reference to embodiments.

The figures show: Figure 1 is a block diagram representation of the functional structure of the electronic gear control and verification.

Figure 2 shows the principle connection of the AC power switch LS.

Figure 3 shows the connection of the four-wire gear reverse device 35.

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Figure 4 shows the state of the stallion motor and monitoring switches.

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Figure 5 shows the principle connection of the safety switch SS.

Figure 6 shows the principle circuit of the controller UW.

5 Figure 6a shows the connection of the current monitoring element.

Figure 7 is a tabular representation of a bit diagram during gear shifting.

Figure 8 shows a state diagram for setting the gear (shift from left to right, end state on the right).

1.0 Figure 9 shows a state diagram for setting the gear (shift from right to left, end state on the left).

Figure 10 is a state diagram of the dynamic end state and motor backup of the gear reversing device and the gear control (end state on the right).

15 Figure 11 shows a state diagram of the dynamic end state and motor backup of the gear reversing device and the gear control (end state on the left).

Figure 1 shows in general the functional structure of mainly electronic gear control. According to it, the change of position of the gear unit is caused by the remote equipment FE, by the hub equipment itself or also by the local equipment OE. The remote equipment can then act on a computing unit or microprocessor-controlled gear unit control WST up to a 50-100 km long data transmission line, which is installed in the switch cabinet in the vicinity of the gear unit or gear units and in which the local unit OE is also located, for example. The switch cabinet also houses the electronic gear lock WSI as well as the elements belonging to the process area, such as the AC power switch LS, the controller UW and the safety switch SS. As a coordinating calculator for gear control WST or gear verification WSI, the so-called

SIRE = reliable calculator. The reversing device WA itself, which is to be controlled, is an existing four-wire reversing mechanism. It can be located at a distance of 6.5 km from the switch cabinet and is connected to this with the existing four-conductor cable SK. The 4 79987 gear-free notification device GF included in the transmission part completes the overview. The gear-free notification device GF affects the gear-verification WSI. The effect arrows indicate reciprocal effects.

The invention relates to elements operating together in a control cabinet in the process area, an AC power switch LS, a controller ÖW and a backup switch SS connected to the gear changeover device WA and to the gear unit control WST and the gear unit safety WSI.

The reversing device WA is controlled via the AC power switch LS by means of an intermediate connection of the controller UW from the gear control WST, which is in operative communication with the gear backup WSI and the safety switch SS, whereby the latter acts on the AC power switch LS.

15 The reversing device WA communicates with the controller ÖW via a standard four-wire line SK, along which both the setting current and the position and return messages flow. Here, too, the arrows of influence indicate the different directions of the matter.

20 The operating principle of gear control is three-stage as follows: 1. gear setting, 2. gear lock, 3. gear monitoring.

1. Gear setting

When the gear control WST has received a control command from either the local equipment OE or the remote equipment FE, it implements the reversing of the gear in the desired direction. However, this is only possible if the gear unit is not locked or blocked and for any other reason is unable to replace (eg due to a fault). If the result of the check-30 is positive, the setting request goes to the gear unit WA for the setting current output. In this context, the leaving of the terminal space, the turning of the gear unit and the achievement of the desired final state are monitored. When the gear unit has reached the end state, the set current is switched off in a signal-reliable manner and the gear unit is requested to be confirmed via the gear unit safety WSI. The AC power switch LS controls the output r-j-r5 of the AC power switch 5,79987 (cf. Fig. 2), respectively, in the desired direction of the reversing apparatus WA. The respective positions of the control switches WA of the reversing device WA give the supervisor UW outputs, E £ and E ^ the bit pattern corresponding to Fig. 7.

5 2. Gear lock

Securing the gear unit against unintentional switching is carried out in a signal-safe manner as soon as the gear unit has reached the desired end state or when it is desired. This can be, for example, a lock request when the desired end state of the gear 10 has been reached or a lock request when the corresponding gear section is occupied.

If a fault occurs in the gear control or gear lock, this is unambiguous and can be located in a specific gear that can be locked. If in this connection the space is still monitored reliably in terms of signal technology, then it is closed in this situation. This closed space can only be removed by a manual operation.

3. Gearbox monitoring 20 The gearbox position, the gearshift equipment WA, the gearbox control WST and the gearshift lock WSI are constantly monitored. The method of control varies and is divided into static and dynamic control. Further features are presented below.

A signal-technically secure calculator element operating unit for gear control - which is not the subject of the invention here - must be briefly described in outline. It operates on a "fail-safe" basis, which means that a shutdown or malfunction will directly or indirectly result in the computer being safely shut down from the process. To this end, the calculator function unit has backup functions for interruption and fault detection as well as indirect switch-off. After an interruption and fault detection, an error is isolated depending on its cause. This means 35 that, depending on the interruption identified, only the part that can no longer function properly can be intentionally and securely connected. For example, if the reversing device no longer works reliably, it must be switched off. Such a safe state once reached is only intentionally exited after the disconnection has been removed.

The gear control WST itself is not secure and could at any time erroneously attempt to control the reversing hardware for WA operation. Therefore, gear is ensured in certain cases. The locking or blocking task for one or 10 more gears comes from the gear lock WSI. It can be triggered by a command from the remote hardware or it will operate independently as soon as the gear unit has reached the desired end state or when the corresponding gear unit is occupied. The gear is inhibited regardless of the inhibit command when a fault occurs in the gear control or gear. In all cases, the gear unit lock WSI then switches off the setting current of the gear unit inverter WA with the safety switch SS (forced-relay switch). This switch is commonly used in SS off mode. 20 In the event of a fault, only one connection is possible when the load is on. The SS switching state of the backup switch is constantly monitored on a "fail-safe" basis.

The gear unit is locked when the gear unit is occupied and remains locked for as long as the charge lasts. When the gear-25 portion is released, the lock can be released automatically upon request.

The gears can also be controlled locally. In this way, the work of the organizing staff is facilitated and the signal technology of the maintenance operations is simplified.

30 Local operation corresponds to a manual transmission that is set electronically from the control panel or directly from the vehicle. The reversal and position of the gears are displayed on either the control panel or the gear signal. However, local setting of the gear unit is only possible if it has been authorized by the remote equipment FE.

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The setting and backup tasks are transferred from the remote device FE to the gear control and gear backup devices WST / WSI and the messages in the opposite direction. Since the transmission must also be successful over long distances / serial data transmission has been introduced. The data transfer speed depends on the data transfer device. Both message types (commands and notifications) are byte-oriented and contain, in addition to the actual information, address formation information / confirmation information and general control information (e.g. start and stop characters, start and end characters). The switch control WST receives incoming commands, forwards the payload information, and checks for transmission errors. At the same time, the complete information messages of the gear control are generated from the payload data, which are sent to it at the request of the central equipment. To ensure reliability, notification messages are transmitted cyclically. Command messages are spontaneous in nature, but can also be transmitted cyclically when needed and in use. In this case, they are simultaneously triggered by the wizard notification information.

20 Gear control The WST controls the AC power switch LS via the voltage-separated digital output stage DA through the control inputs R1, R2, R3, R4, R5 and M (cf. Fig. 2). The AC-current power switch LS is connected to the AC mains 3 X 220/380 V / 50 Hz via the safety switch SS and is a setting-25 element for the reversing device WA under the protection of the controller UW. The AC power switch LS contacts the AC inverter WA without contact (wear). Fig. 2 is a schematic circuit diagram of an AC power switch LS, and Fig. 3 is a four-wire gear inverting apparatus continued thereon.

According to Figure 2, the AC power switch LS consists of five AC switches WS1-WS5 connected to the supply lines R, S, T to the windings of the reversing motor windings. The shifting of both phases R and S, which can be achieved by means of the Na-changeover connection (WS1 and WS2 or WS4 and WS5), results in the gearshift motor running to the right or to the left. The MP cable does not have a switch. For supplying the set current of the reversing device WA, the AC te-5 circuit breaker LS is connected to the AC mains with the earth conductor via a safety switch SS. A test voltage of 60 V, 50 Hz is connected to the other side via the test voltage switch PS of the safety switch SS. The AC switches WS are preferably non-parallel connected thyristors and the control is provided by the switch control WST from the digital data DA. There is a strict voltage separation between the control and load circuits. The thyristors are controlled so that the load is switched on immediately. The conductive state can only be maintained for the duration of one or more AC half-wave waves 15. The LS of the AC power switch is controlled on the basis of the digital output of the gear control at DC voltage. When a DC voltage is applied to the output of each AC switch, the thyristor lights up.

If the gear unit needs to be moved to another position, the electric gearshift equipment WA is controlled accordingly.

It has the conventional circuit shown in Fig. 3. The figure is shown in the signaling representation of the DB (Deutsche Bundesbahn), in which a solid line indicates an operating circuit and a half dashed line indicates a rest circuit. The required 25-way torque is produced by an AC motor 380/220 V / 50 Hz with windings WZ, VY, UX. The turning device converts the rotational movement of the motor into a longitudinal displacement, which is applied to the gear tongues with the setting rod. With two tongue check rods (not shown), each attached to one gear-30 tongue, it is examined in the gear-turning device whether the tongues have followed the setting movement of the setting rod and whether a predetermined end state has been reached. The end state or monitoring terminals UK1 / 1a and fJK2 / 2a are used for this. The MK3 / 3a and MK4 / 4a are labeled motor terminals that cause the motor to be switched off in their final states, STA1, STA2, STA3 and STA4 show hand crank switch terminals for interrupting 9 79987 power supplies to the 2 ground conductors of all AC phases 1 and RST , 3, 4) when the turning device is used or has to be operated manually with a hand comb.

5 To limit the starting current - to achieve a softer start - the engine almost always runs in phase S against the ground and in phase R T against. After starting the engine, the motor switch MK4 / 4a and the monitoring switch UK2 / 2a change state. Through switch MK4 / 4a 10, the ground conductor Jp is disconnected from phase S and the windings of all three phases are connected by switch UK2 / 2a. The motor then runs at full power in star connection until a new end state is reached.

The exact interaction of the motor switches and gear control switches UK 15 depending on the language movement can be understood from Figure 4.

If the switching of the gear unit has been successful, i.e. the gear tongues have reached and signaled the desired end state within a certain monitoring time, the 20 gear control WST switches off the AC phases via the AC switches WS1-WS5. The engine stops - this is monitored - and then the final gear position is checked. To do this, both the AC switch WS1 and WS2 are briefly switched on. Supervisor ÖW current monitors 01-25 03 (cf. Fig. 6) give the final state corresponding to a certain bit pattern (Figs. 8 and 9). If the nominal mode and the actual mode match, a cycle of dynamic monitoring of the reversing device and the gear control starts.

Figure 5 shows the backup capability SS with its setting and test current supplies in detail. It is also in the DB presentation. The function of the safety switch SS is to reliably switch off the set and operating voltage from the AC power switch SS. This prevents unintentional turning of the gear unit. The backup switch SS belongs to the process area, is controlled by the gear backup WSI and performs all gear backup tasks. As soon as the gear unit 10 79987 has reached the end state after turning and the power switches have switched off the set voltage, the backup switch SS reliably separates the set voltage from the AC power switch LS. Reliable output of the gear backup results in SS control of a safety switch with a signal-safe connection. It is manufactured with telecommunication technology (relay SS) with forced-controlled terminals SS02, 03, 04, SS05 and 15. Control is based on digital output DA; return notifications via digital reception DE. The safety switch SS left-10 also supplies a test voltage from the supply to the secured switch, which takes place via relay PS and terminals PS02, 03, 04, 15.

The safety switch SS implements the functions provided by the gear lock WSI, gear lock, gear lock 15, gear lock, gear lock, and gear lock. As soon as the locking or closing operation has to be performed, the backup switch SS is technically certain to separate the AC power switch LS from the AC mains. This isolation usually occurs in the off-20 mass state because the AC power switch LS has previously taken the off state in time. The safety switch SS is dimensioned in such a way that in the event of a fault in the power switch LS, the switch is also possible when the load is on. At the same time, a test-25 voltage (60 V, 50 Hz) is connected to the status monitor via the power switch LS.

Figure 6 shows the diagram structure of the controller ÖW. Supervisor ÖW consists of six separate current supervisors ϋ1.1, U1.2, U2.2, U3.2. Two series-connected current controllers, for example ϋ1.1 and 01.2 - they form a current limiter marked 30 Ö1 - are always connected by phase conductor R, two other current controllers 02.1 and U2.2 phase by conductor S and current controllers U3.1 and ΪΪ3.2 for ground wire mp.

The current controllers are constructed in exactly the same way, always two successively connected current controllers operate replaceably and without counteraction. Compared with Fig. 79987 to Fig. 6a, which shows one such current monitor, the input resistor with its resistors is due to the current transformer T1 in the input. The current controller offers the possibility of controlling the current flow of the set-up current and transmits this to the gear unit via a voltage-free transistor output when the control circuit is switched on and interrupted. The current transformers are dimensioned on the output side so that both the control current of about 2A and the test current of about 0.3A work properly.

As soon as the set or test current passes through the current transformer T1 from the output side, the inductively transmitted voltage is rectified, equalized and applied to the base of the Darlington switching transistor V2. The collector-emitter path in the switching transistor thus becomes a low resistance and the control current of 24 V = the power supply flows through a working resistor connected outside the emitter to zero voltage. The voltage at the emitter blade E is applied to the gear unit as a control voltage via terminals E1.1 to E3.2. E1.1 goes to processor channel I, E1.2 to processor channel II, etc. (as shown). UB1 is the operating voltage of processor channel I 24V and UB2 is the operating voltage of processor channel II. The primary messages of the current limiters are available as a bit model for gear control and gear safety for further processing.

25 To reverse the gear, switch the AC power switch LS through the AC voltage in three phases. During the supply, the setting currents next pass through the current limiters U1, U2 and U3 and give a corresponding message (cf. Fig. 7) to the inputs E1, E2, E3 (i.e. E1.1 and E1.2, etc.) (bit-30 model 111). At the end of the supply, when the corresponding motor switch MK4 / 4a and monitoring switch UK2 / 2a are connected in the gear selector, no more current flows through U3 (Mp). This change in the message (bit pattern 110) results in an acknowledgment of the WST input monitoring in the gear control (the gear is source-35 now in its final state). If the gear unit reaches the end state again, the corresponding limit state switches MK3 / 3a and 12 79987 UK1 / 1a are actuated by the gear changeover device. U3 is switched on again and message 111 is issued. This change in message results in a transfer control acknowledgment (phase has reached end state). The setting current 5 is switched off (bit model 000) and the monitoring current is switched on when the gear tongues have reached their final state when the gear is turned, which is constantly monitored by the test rods. If the gear unit moves from the monitored end state due to an external influence, the monitoring current is interrupted. When the check current is switched on in the opposite direction, the setting current in the safety switch SS is also switched off once more.

To determine the final state of the switch, phases R and S are switched on and phase T is switched off via the respective AC switches WS1 and WS2. The test current is then transmitted through steps R and S.

Figure 7 shows in tabular form the interaction of the power switch LS and the supervisor UW during the settings in the left / right direction and the bit pattern of the supervisor UW at the outputs E1, E2 and E3.

The appearance of the bit pattern 111 after the bit pattern 110 is not yet a criterion for actually reaching the correct end state, and therefore the next step is to turn off the set current again and check the end state.

25 If the gear unit is in end mode, it is electrically backed up (switch-off current switched off). In this case, according to the invention, a test voltage switch PS is activated by means of a safety switch SS and a test voltage of 60 V, 50 Hz is continuously connected to the AC power switch LS.

30 The test current is constantly on and is dimensioned in such a way that the reversing device cannot react to it, ie it does not become loaded or supplied (for example, a single-phase voltage of 60 V, 50 Hz Ie = 300 mA through the motor windings).

35 Thanks to the test voltage and the switching between the two AC switches or between R and S, 13,799 87 continuous and signal-technically reliable end-state monitoring are achieved.

Figures 8 and 9 show the state diagrams for the gear setting and the associated end state monitoring when the 5 end state is reached. Fig. 8 shows the setting of the gear from left to right (end state "right") and Fig. 9 shows the setting from right to left (end state "left").

As shown in Fig. 8, from point 13, both AC switches WS1 and WS2 are controlled via the inputs and R2 to monitor the status. The test current goes - also compares Figures 2, 6 and 3, respectively - through step R, via switch WS1, current limiter U1, motor winding WZ, motor switch output MK3 / '3a through cable conductor 4 and current limiter U3 back to ground line Mp. Inputs E1 and E3 of current limiters U1 and 15 U3 take the L signal and the U2-0 signal; code 101 indicates the status on the right. The final status check of the space on the left takes place in a similar manner according to Fig. 9. In this case, the AC switches WS1 and WS2 are controlled over R1 and R2 (starting from point 13). However, the current of the test 20 passes through the phase S, through the AC switch WS2, the current limiter U2, the motor winding VY, the motor switch output MK4 / 4a over the cable conductor 4 and the current limiter U3 back to ground Mp.

The supervisor (Jw outputs E1 and E3 thus produce the following 25 bit patterns:

In the right mode: E1 = 1, E2 = 0, E3 = 1

In the left state: E1 = 0, E2 = 1, E3 = 1

Within the framework of the on-line test, the test currents are briefly routed through the on-line test WS1-WS5 via the on-line test in a certain cycle, whereby all three messages E1-E3 of the supervisor briefly give a certain bit pattern. This is referred to in Figures 10 and 11, from which an algorithm can be derived for both the state on the right and the state on the left. It is found that the control outputs R1, R2, R3, R4, R5 of the AC switch WS switch the test current cyclically. The bit models for the i4 79987 end state monitor go to the switch-backed WSI as shown in Figure 1, where they are compared and affect the switch control WST.

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Claims (10)

1. Switching scheme for controlling and securing a switch, soin is operated by means of a remote control device 5 (FE) (switchgear) or a local control device (OE), into which commands feed by means of data transmission in a signal-technically safe way to an electronic auxiliary control and auxiliary circuit (WST, t) W), which is locally connected to an alternating current (WA) operation, and with which the auxiliary operation (WA) is connected to an alternating current network with 0 conductors via a contactless alternating current power switch (LS), current monitoring devices and a four-wire switching cable, whereby operation (WA) and a final position indication with monitoring are effected via motor and end switch contacts, characterized by the following factors: a) the monitoring device (tlW) controls the currents in two phases (R, S) and in the 0 conductor (Mp), under current flow gives a signal in logical upper state and moves the bit pattern to the switching control (WST) and the fuse coupling (WSI) for analysis, b) where it is of the position of the gear, i.e. of the corresponding position of the gear motor (WA) motor and end position contacts which depend on the bit pattern corresponding to the predetermined directional pattern in the gear control coupling (WST), this stops the gear operation (WA) by switching off the AC power switch (LS), c) a pre-switched fuse switch (SS) then separates the AC power switch (LS) from the AC (R, S, T, Mp) and connects it to an AC test voltage in a phase, whereby the fuse switch (SS) switching state is monitored by the fuse switch (WSI) . d) via the test voltage and the alternate switches (WS) of the AC power switch (LS), which are controlled in an automatic test mode, continuously monitor the test current genoxn the alternating operation, whereby it is possible to ascertain the exact exact position in a signal technically safe manner. by means of the bit patterns transmitted by the monitoring device (t) W). 2. A circuit diagram according to claim 1, characterized in that a signal-technically safe determination of the end position is carried out by means of the test voltage and the connection of two alternating switches (WS1 and WS2) of the alternating circuit breaker (LS) in phases R and S. 3. A wiring diagram according to claim 1 or 2, characterized in that the test currents (t) 2, t) 2 of the current monitoring device (t) 2, t) 3 are regularly interrupted for examination of the monitoring device (t) W) on a regular basis. ) all three entries (bit patterns) E1, E2, E3) for a short time must be zero. 4. A circuit diagram according to any one of the preceding claims, characterized in that the AC power switch (LS) consists of three alternating switches (W, S, T, W), and two alternating switches (WS 5). , WS4), which switches phase order (R and S) where the 0 conductor is realized without coupling. Wiring diagram according to any of the preceding claims, characterized in that the monitoring device (t) W) includes three redundant built current monitoring devices (ϋ1, ϋ2, ϋ3) which have been connected in phases (R and S) and in the 0 conductor. (MP) and which, under current flow, give a signal in logical Upper state. Wiring diagram according to any of the preceding claims, characterized in that the gear control (WST) and the gear fuse coupling (WSI) are integrated in a common secured computer unit (SIRE). Wiring diagram according to any of the preceding claims, characterized in that the gear control (WST) and the gear fuse coupling (WSI) have been implemented as separate units. Wiring diagram according to any of the preceding claims, characterized in that a plurality of gear control (WST) and gear fuse connections (WSI) have been assembled in a central remote control device (switchgear). 9. Wiring diagram according to any of the preceding claims, characterized in that the gear control (WST) and the gear fuse couplings (WSI) have been arranged decentrally in separate coupling cups in the vicinity of the respective gear. 10. Wiring diagram for control and fuse according to any of the preceding claims, characterized in that 1 an observed fault condition shifts the gearbox fuse (WSI) from the gearbox operation (WA).