Procedure for testing the insulation of electrical networks in a cable bundle

Abstract

The disclosure relates to a method for testing the insulation of a plurality of electrical networks (11, 12, 13, 14) of a wire harness, where each network comprises a group of electrical contacts that are interconnected through electrical conductors.The method comprises the following: grouping the networks into a first group of networks (21) and a second group of networks (22) according to a grouping scheme; applying a first potential (141) to a first contact (112) of each network in the first group of networks (21) and applying a second potential (142) to the remaining contacts of each network in the first group of networks (21), as well as to all contacts of each network in the second group of networks (22); testing the contacts of the second group of networks (22) connected to the second potential (142) for current flow; and detecting electrical isolation between the networks of the second group of networks (22) and the networks of the first group of networks (21), if the test of the contacts of the second group of networks (22) connected to the second potential (142) has shown that no current flows.

Description

Procedure for testing the insulation of electrical networks in a cable bundle Technical field The present invention relates to a method and system for testing the insulation of a plurality of electrical networks within a cable bundle, particularly a wiring harness in the automotive sector, as well as a corresponding software program and a computer-readable storage medium. The invention relates specifically to the insulation testing of electrical networks. State of the art Cable harness networks are typically tested at the line level ("continuity testing"). This involves testing only two plug contacts at each step; all other plug contacts are excluded. Therefore, the measurements are performed sequentially, which is very time-consuming and labor-intensive. Document CN 113219372 A describes a cable detection device, a method for detecting line resistance, and a method for detecting insulation resistance. The device includes a relay assembly, a detection control board, and a power supply unit. One side of the relay assembly is connected to the detection control board, and the other side is connected to two ends of the conductors of a cable being tested. The relay assembly is used to apply a detection signal between two conductors of the cable being tested. The detection control board is used for switching, to perform a detection of the line resistance or insulation resistance of the cable being tested, and to generate a corresponding detection signal. The power supply unit is connected to the detection control board and is used to supply power. US Patent 5029274 A describes a device for testing the integrity of cables comprising a transmitter and a receiver, which are electrically connected to opposite ends of a group of cables to be tested. The transmitter generates a voltage test signal, which is applied to a cable test assembly, and a reference voltage signal is applied to a wire reference assembly. In the receiver, indicator circuits connect the cables to a common bus. The reference signal is applied to the common bus, and when the test signal is present, the indicators generate an indication. The test signal can cyclically pass through a plurality of test assemblies, which together form the test group assembly. Description of the invention One objective of the invention is, therefore, to create an advantageous concept for improving the insulation testing of networks in cable bundles, in particular, a concept in which the time and labor required can be reduced. The objective is achieved through the objects of the independent claims. The advantageous improvements of the invention are indicated in the dependent claims, the description, and the accompanying figures. The procedures described here allow for the parallel testing of complex electrical networks within cable harnesses using small, independently operating measuring units to verify correct connections and the absence of short circuits. A cable harness, which can also be a complex circuit board or similar component, consists of several connectors with plug contacts. These contacts are electrically connected via wires to other plug contacts within the same connector or to different connectors. The term "network" refers to groups of electrically conductive plug contacts. Different networks within the same cable harness must not be electrically connected. This must be verified to ensure the subsequent correct operation of the cable harness. The inventive solution is based on the idea of ​​dividing all the wires in a harness into two groups. One group is electrically connected to ground (GND), and in the other group, each plug contact can be tested independently of the other contacts in the group by connecting a voltage source to ground. If no current flows, the plug contact is not connected to the first group and is therefore properly insulated. The two groups of networks are specially regrouped at each measurement step, so that after a few measurement steps, each network has been measured once against each of the other networks. This inventive solution offers the technical advantages of reducing testing times in the production of cable bundles and improving the utilization of existing testing equipment through the parallel use of test equipment or testing hardware. Furthermore, it is possible to use existing hardware in parallel to test cable bundles with the inventive solution, significantly reducing testing times in production. According to a first aspect, the objective described above is achieved by a procedure for the insulation testing of a plurality of electrical networks within a cable bundle, where each electrical network comprises a group of electrical contacts connected to each other via electrical lines.wherein the procedure comprises the following: Grouping the plurality of electrical networks into a first group of electrical networks and a second group of electrical networks according to a grouping scheme; Applying a first electrical potential to a first contact of the group of electrical contacts of each electrical network of the first group of networks and applying a second electrical potential, which is different from the first electrical potential, to the remaining contacts of the group of electrical contacts of each electrical network of the first group of networks, as well as to all the electrical contacts of the group of electrical contacts of each electrical network of the second group of networks; Checking the current flow of the electrical contacts of the second group of networks connected to the second electrical potential;and detect electrical isolation between the electrical networks of the second group of networks and the electrical networks of the first group of networks, if the check of the contacts of the second group of networks connected to the second electrical potential has revealed in each case that no current flows.; This procedure implements an advantageous concept for improving insulation testing in cable harness manufacturing. This results in technical benefits such as reduced testing times in cable harness production and better utilization of existing testing equipment through parallel operation. According to the procedure, the grouping scheme performs in a first step a first grouping of the electrical networks and in a second step a second grouping of the electrical networks, which is different from the first grouping; where the connection of the electrical potentials, the checking of the contacts of the second group of networks to detect the flow of current and the detection of electrical insulation are repeated for the second step. This approach offers the technical advantage of applying the electrical insulation test to a second grouping of networks, which is different from the first grouping. With a properly designed grouping scheme, only a few steps are needed to check the insulation of all networks. According to the procedure, the grouping scheme performs additional groupings of the electrical networks in further steps, which differ from the previous groupings; where the connection of the electrical potentials, the checking of the contacts of the second network group to detect the flow of current and the detection of electrical insulation are repeated for the following steps, until there are no more groupings that differ from the previous groupings. This approach offers the technical advantage of applying electrical insulation testing to different network groupings than those previously used. With a suitable grouping scheme, a complete electrical insulation test of the networks can be performed in just a few steps. Therefore, the procedure leads to reduced testing times in cable harness production and more efficient use of testing equipment through parallel operation. According to an example embodiment of the procedure, the plurality of electrical networks comprises a number of electrical networks that is a power of two; and wherein the application of electrical potentials, the checking of the contacts of the second group of networks to detect current flow, and the detection of electrical insulation are performed in each case for a number of steps that corresponds to the exponent of the power of two. With such a large number of networks, an optimal insulation check can be performed in a very short time. This is because, with two power-of-two electrical networks, a complete check can be performed after a number of steps corresponding to the exponent of the power of two. For example, with eight networks, three steps are sufficient, or with 16 networks, four steps are sufficient. According to an example embodiment of the procedure, the grouping scheme performs a uniform grouping, in which the first group of networks and the second group of networks comprise the same number of electrical networks or in which the respective numbers do not differ from each other by more than one. This approach offers the technical advantage that both groups comprise the same or nearly the same number of networks, and the testing effort is distributed evenly between them. Therefore, using the same test hardware, the first group can be tested first, followed by the second group. According to an example embodiment of the procedure, the application of the first electrical potential and the application of the second electrical potential to the respective contacts of a network of the first group of networks are carried out simultaneously, successively, or in groups. This approach offers the technical advantage that simultaneous application significantly reduces testing time, while sequential application allows for particularly efficient resource use; for example, the same voltage or current source can be used for both. Group connection provides advantages in terms of both testing time and resources. According to an example embodiment of the procedure, the application of the first electric potential and the application of the second electric potential to the respective contacts of a second network of the first group of networks are carried out simultaneously or after the application of the first electric potential and the application of the second electric potential to the respective contacts of a first network of the first group of networks. This achieves the technical advantage of flexibility when testing insulation, with regard to reducing testing time and using resources in parallel. According to an example embodiment of the procedure, the application of the second electrical potential to the respective contacts of a network of the second group of networks is carried out simultaneously or after the application of the second electrical potential to the respective contacts of a network of the first group of networks. In this way, the technical advantage is achieved that flexibility can also be had when checking the insulation with regard to reducing the checking time and the parallel use of resources. According to one example embodiment of the procedure, the first electric potential is a ground potential; and the second electric potential is a reference potential, which is generated by applying a reference voltage or a reference current. This approach offers the technical advantage of simplifying the procedure. If the ground potential and the reference potential are known, the difference between them is also known or can be adjusted to produce a desired test current in the connecting line between the two potentials, which can then be easily measured or detected with readily available measuring instruments. According to an example embodiment of the procedure, it comprises the following: Checking the current flow of the contacts of the first group of networks connected to the second potential; and detecting the integrity of the electrical networks of the first group of networks, if the check of the contacts of the first group of networks connected to the second potential has resulted in a current flow in each case. Integrity here means that all electrical contacts in an electrical network are electrically connected to each other. Therefore, there is no electrical line connecting the electrical contacts of the electrical network that is interrupted or faulty. This provides the technical advantage of not only allowing for an isolation test between networks but also, simultaneously, a check of the integrity of individual networks. For example, this method can efficiently detect a cable break or other fault in the connection line. According to an example embodiment of the procedure, it comprises the following: Switching the second electrical potential to the first electrical potential at a first contact of the electrical contact group of each electrical network of the second network group; Checking the current flow of the contacts of the second network group switched to the second potential; and detecting the integrity of the electrical networks of the second network group, if the check of the contacts of the second network group switched to the second potential has resulted in a current flow in each case. In this way, the technical advantage is achieved that not only can the integrity of the first group of networks be checked, but also the second group of networks and, therefore, the networks of the entire cable bundle. According to an example embodiment of the procedure, at least one electrical contact of at least one electrical network comprises a plug contact. This provides the technical advantage of being able to check the electrical insulation of cable bundles with conventional plug contacts. According to a second aspect, the objective described above is achieved by means of a computer program according to claim 11. The computer program includes, in particular, instructions that, when a computer runs the program, cause it to execute the procedure in accordance with the first aspect described above. In this way, the technical advantage is achieved that the computer program can be easily run on a test system with the corresponding test hardware. According to a third aspect, the objective described above is achieved by means of a computer-readable storage medium according to claim 12. The computer-readable storage medium comprises, in particular, instructions which, when executed by a computer, cause it to perform the procedure in accordance with the first aspect described above. In this way, the technical advantage is achieved that the procedure can be efficiently stored in the form of instructions of a computer program on a common storage medium, such as, for example, a data carrier. According to a fourth aspect, the objective described above is achieved by means of a test system for the insulation test of a plurality of electrical networks of a cable bundle from each other according to claim 13. Each electrical network comprises, in particular, a group of electrical contacts, which are connected to each other through electrical lines; wherein the test system comprises, in particular, the following: a system component for grouping the plurality of electrical networks into a first group of electrical networks and a second group of electrical networks according to a grouping scheme; a system component for applying a first electrical potential to a first contact of the group of electrical contacts of each electrical network of the first group of networks and for applying a second electrical potential, which is different from the first electrical potential, to the remaining contacts of the group of electrical contacts of each electrical network of the first group of networks, as well as to all the contacts of the group of electrical contacts of each electrical network of the second group of networks;a system component for checking the current flow in the contacts of the second group of networks connected to the second potential; and a system component for detecting electrical insulation between the electrical networks of the second group of networks and the electrical networks of the first group of networks, if checking the contacts of the second group of networks connected to the second potential has revealed in each case that no current flows. A testing system of this type offers the same technical advantages as the procedure described above; that is, an advantageous concept can be implemented to improve insulation testing in the manufacture of cable harnesses. The resulting technical advantages are a reduction in testing times during cable harness production and better utilization of existing testing equipment through parallel operation. Brief description of the figures The invention is described in more detail below by means of exemplary embodiments and figures. They show: Fig. 1 a schematic representation of a procedure according to the invention for testing the insulation between the electrical networks of a cable bundle; Fig.2a, b, c schematic representations of examples of electrical networks 11, 12, 13; Fig. 3 a schematic representation of a procedure 200 according to the invention for testing the insulation between the electrical networks of a cable bundle; and Fig. 4 a schematic representation of a test system 400 according to the invention for testing the insulation between the electrical networks of a cable bundle. The figures are merely schematic representations and serve only to explain the invention. Identical elements or elements with the same function are systematically designated with the same reference numbers. The following detailed description refers to the accompanying drawings, which form part of it and which show, by way of illustration, specific embodiments in which the invention can be carried out. It is understood that other embodiments may also be used and structural or logical changes made, without departing from the concept of the present invention. Therefore, the following detailed description should not be interpreted restrictively. Furthermore, it is understood that the features of the various embodiments described herein may be combined with one another, unless specifically stated otherwise.The aspects and embodiments are described with reference to the drawings, where the same reference numbers generally refer to the same elements. Numerous specific details are set forth in the following description for explanatory purposes, to provide a thorough understanding of one or more aspects of the invention. However, it may be obvious to a person skilled in the art that one or more aspects or embodiments can be carried out with a lesser degree of specific detail. In other cases, known structures and elements are represented schematically to facilitate the description of one or more aspects or embodiments. It is understood that other embodiments may be used and structural or logical changes made without departing from the concept of the present invention. Fig. 1 shows a schematic representation of a procedure 100 according to the invention for testing the insulation of electrical networks of a cable bundle from each other. In this example, eight networks 11, 12, 13, 14, 15, 16, 17, 18 of the cable bundle, designated A, B, C, D, E, F, G, and H and shown above in Figure 1, are checked for electrical insulation between them. Examples of these networks, which are described later in relation to Figure 2, are shown in Figure 2. Procedure 100 comprises a division algorithm 110a (shown at the top of Figure 1) and an electrical measurement process 110b (shown at the bottom of Figure 1). A number of example three steps 211, 212, 213 are carried out sequentially. That is, first step 1 of the division algorithm 110a, and then step 1 of the electrical measurement process 110b. Next, step 2 of the division algorithm 110a, and then step 2 of the electrical measurement process 110b. Finally, step 3 of the division algorithm 110a, and then step 3 of the electrical measurement process 110b. As a prerequisite, all contacts in the wiring harness are electrically connected to a test system. The measurements are divided into steps, which are performed sequentially. Within each step, measurements can be performed in parallel. For the eight example networks A, B, C, D, E, F, G, and H, each with four wires, represented in Figure 1, only three steps (211, 212, and 213) are required for a complete cable bundle check. For each step (211, 212, and 213), the entire network is divided into two groups (21 and 22), and only the isolation of the two groups from each other is checked. Division 110a and measurement 110b are performed for this example with eight networks A, B, C, D, E, F, G, H as follows. In step 1, networks A, B, C, D are created and assigned to the first group 21, and networks E, F, G, H are assigned to the second group 22. Next, networks A, B, C, D from the first group 21 are assigned opposite networks E, F, G, H from the second group 22 to check the current flow. In step 2, networks A, B, E, F are assigned to the first group 21 and networks C, D, G, H to the second group 22. Next, networks A, B, E, F from the first group 21 are assigned against networks C, D, G, H from the second group 22 to check the current flow. In step 3, networks A, C, E, G are assigned to the first group 21 and networks B, D, F, H to the second group 22. Next, networks A, C, E, G from the first group 21 are assigned against networks B, D, F, H from the second group 22 to check the current flow. After the first step 211, it is known that A, B, C, and D are isolated from E, F, G, and H. After the second step 212, it is also known that A is isolated from C, D, and B is isolated from C, D is isolated, as well as E from G and H, and F from G and H. In the third step 213, it is further known that A is isolated from B, B from C, C from D, G from H, H is isolated from G, and E is isolated from F. For measurement, as shown in Figure 1, all networks in the first group 21 are connected to GND (ground), and each contact in each network of the second group 22 can independently and in parallel check for current flow to GND by connecting a voltage source. If current flows, the corresponding contact is reported as connected. So far, it is only known that the networks are isolated from each other, but it is not yet known whether the networks themselves are complete. To check this in parallel, as in the example in Figure 1, only one contact is connected to GND for each network in the first group 21. Then, all the remaining contacts in the networks of the first group 21 should respond with a current flow. The contacts in the networks of the second group 22 should not respond if the isolation is correct. If the reception of all contacts in the networks of the first group 21 has been confirmed, the networks are complete. If a contact in a network—that is, a group of electrically connected contacts—is connected to ground (GND), then a current flow can be immediately detected at any other pin in this network when a voltage source is applied, because there is an output to GND. Conversely, no current flows at contacts not connected to the network when a voltage source is applied, thus determining isolation. Therefore, it can be determined in one step whether the networks in the first group 21 are isolated from the networks in the second group 22 and whether a network is complete. Since the procedure described above does not check the integrity of all networks, for example, network H is never in the first group 21, the networks of the first group 21 are simply connected to GND once in each measurement, or rather: one contact of each network of the first group 21 is connected to GND, and then, in a second measurement, the networks of the second group 22. In addition to the isolation of networks from each other, it is now also known that the networks themselves are complete. According to the example in Figure 1, the four contacts of a network are connected to each other. In other words, the following applies: first group 21 to GND, second group 22 is connected to the voltage source; an insulation test can be performed between the two groups 21, 22. To simultaneously check integrity, in the first group 21 only one contact is placed at GND per network, the remaining contacts are connected to the power supply as all the contacts of the second group 22. The desired result is current flow in the contacts of the first group 21, which are connected to the voltage source (discharge to GND), meaning the networks are complete. As an additional desired result, there is no current flow in the contacts of the first group 21, which are connected to the voltage source (no output to GND), meaning the networks of the first and second groups 21 and 22 are isolated. Figures 2a, 2b and 2c each show schematic representations of examples of electrical networks 11, 12, 13. Electrical networks 11, 12 and 13 are examples of cable bundle networks, which can be checked for electrical insulation by the procedure according to the invention. Figure 2a shows a first example electrical network 11 with four electrical contacts 111, 112, 113, 114, which are connected to each other through the electrical wires 121, 122, 123, 124. In this example, the electrical wires 121, 122, 123, 124 pass through a neutral point 120, which connects the electrical lines 121, 122, 123, 124 to each other. Figure 2b shows a second example of electrical network 12 with four electrical contacts 111, 112, 113, 114, which are connected to each other via electrical wires 121, 122, 123, 124. In this example, electrical wires 121, 122, 123 pass through a neutral point 120, which connects electrical lines 121, 122, 123 to each other. A fourth electrical line 124 connects a third electrical contact 113 to a fourth electrical contact 114. Figure 2c shows a third example of electrical network 13 with five electrical contacts 111, 112, 113, 114, 115 that are connected to each other via electrical wires 121, 122, 123, 124. In this example, two electrical contacts are connected via an electrical line, i.e., contacts 111 and 112 via line 121; contacts 112 and 113 via line 122; contacts 113 and 114 via line 123; and contacts 114 and 115 via line 124. Contacts 114 and 115 may be located within a terminal strip 130. Fig. 3 shows a schematic representation of a procedure 200 according to the invention for testing the insulation between a plurality of electrical networks 11, 12, 13, 14 of a cable bundle. In this procedure 200, the isolation from each other of an example number of four networks 11, 12, 13, 14 is checked. These could be, for example, networks A, B, C, D, as shown above in Figure 1. The procedure is not limited to the four networks shown here, but can be carried out with any other number of networks, for example, with the eight networks A, B, C, D, E, F, G, H as shown above in Figure 1. Procedure 200 represents a generalization of procedure 100 described above in relation to Figure 1. In the procedure 200 described herein, each electrical network 11, 12, 13, 14 comprises a group of electrical contacts 111, 112, 113, 114, which are connected to each other via electrical lines 121, 122, 123, 124, as shown, for example, in Figures 2a, 2b and 2c described above. Procedure 200 comprises grouping the plurality of electrical networks 11, 12, 13, 14 into a first group of electrical networks 21 and a second group of electrical networks 22 according to a grouping scheme. The grouping can be performed, for example, using the division algorithm 110a described in Figure 1. Procedure 200 comprises applying a first electrical potential 141 to a first contact 112 of the electrical contact group of each electrical network of the first group of networks 21 and applying a second electrical potential 142, which is different from the first electrical potential 141, to the remaining contacts 111, 113, 114 of the electrical contact group of each electrical network of the first group of networks 21, as well as to all electrical contacts 111, 112, 113, 114 of the electrical contact group of each electrical network of the second group of networks 22. Procedure 200 comprises a check of the current flow 150 in the electrical contacts 111, 112, 113, 114 of the second group of networks 22 connected to the second electrical potential 142. Procedure 200 further comprises detecting electrical isolation between the electrical networks of the second group of networks 22 and the electrical networks of the first group of networks 21, if the check of the contacts of the second group of networks 22 connected to the second electrical potential 142 has revealed in each case that no current flows 150. The grouping scheme can, in a first step, for example, in a first step 211 as shown in figure 1, perform a first grouping of the electrical networks 11, 12, 13, 14 and, in a second step 212, perform a second grouping of the electrical networks 11, 12, 13, 14, which is different from the first grouping. For example, in the first grouping, the first group of networks 21 may include networks A, B, C, D and the second group of networks 22 may include networks E, F, G, H, and in the second grouping, the first group of networks 21 may include networks A, B, E, F and the second group of networks 22 may include networks C, D, G, H, as shown in Figure 1. The application of electrical potentials 141, 142, the checking of the contacts of the second network group 22 to detect current flow 150 and the detection of electrical insulation can be repeated for the second step 212. The grouping scheme can also be repeated in additional steps, for example, a third step 213 as shown in Figure 1, and other steps not shown in Figure 1, performing in each case additional groupings of the electrical networks 11, 12, 13, 14, which differ from the previous groupings. The application of electrical potentials 141, 142, the checking of the contacts of the second network group 22 to detect current flow 150, and the detection of electrical insulation can be repeated for the additional steps 213, until there are no more groupings that differ from the previous groupings. In the example in Figure 1, procedure 200 can therefore be discontinued after three steps. If there are more networks to check, further steps may follow. In one example, the plurality of electrical networks 11, 12, 13, 14 may comprise a number of electrical networks 11, 12, 13, 14 that is a power of two, for example, four networks according to Figure 3 or eight networks according to Figure 1. The application of the electrical potentials 141, 142, the checking of the contacts of the second group of networks 22 to detect the flow of current 150 and the detection of electrical insulation can then be carried out for a number of steps 211, 212, 213, which corresponds to the exponent of the power of two, for example, for three steps according to Figure 1 or for two steps according to Figure 3. The grouping scheme can perform a uniform grouping, in which the first group of networks 21 and the second group of networks 22 comprise the same number of electrical networks 11, 12, 13, 14, for example, four networks in the first group 21 and four in the second group 22, as shown in Figure 1, or two networks in the first group 21 and in the second group 22, respectively, as depicted in Figure 3. Alternatively, the respective numbers of networks per network group 21, 22 cannot differ from each other by more than one, for example, when checking an odd number of networks, such as nine, where four networks can be in the first group 21 and five networks in the second group 22. The application of the first electric potential 141 and the application of the second electric potential 142 to the respective contacts of a network of the first group of networks 21 can be carried out simultaneously, successively, or in groups. In simultaneous connection, all contacts are connected at the same time. In sequential connection, one contact is connected only after another. In group connection, specific groups of contacts are connected one after the other; the contacts within the corresponding group can be connected simultaneously or sequentially. The application of the first electric potential 141 and the application of the second electric potential 142 to the respective contacts of a second network 12 of the first group of networks 21 can be carried out simultaneously or after the application of the first electric potential 141 and the application of the second electric potential 142 to the respective contacts of a first network 11 of the first group of networks 21. The application of the second electric potential 142 to the respective contacts of a network 13 of the second group of networks 22 can take place simultaneously or after the application of the second electric potential 142 to the respective contacts of a network 11 of the first group of networks 21. It is understood that there are also a large number of other connection possibilities, which have not been explicitly mentioned here. The first electric potential 141 can be, for example, a ground potential. The second electric potential 142 can be a reference potential, which is generated by applying a reference voltage or a reference current. Procedure 200 may further include the following steps: Checking the current flow of the contacts in the first group of networks 21 connected to the second potential 142; and verifying the integrity of the electrical networks 11 and 12 of the first group of networks 21, if checking the contacts in the first group of networks 21 connected to the second potential 142 has resulted in current flow in each case. In this case, integrity means that all contacts 111, 112, 113, and 114 are connected to each other by electrical lines. Procedure 200 may further include the following steps: Switching the second electrical potential 142 to the first electrical potential 141 at a first contact 111 of the electrical contact group of each electrical network of the second network group 22; Checking for current flow in the contacts of the second network group 22 connected to the second potential 142; and detecting the integrity of the electrical networks of the second network group 22, if the check of the contacts of the second network group 22 connected to the second potential 142 has resulted in current flow in each case. For example, at least one electrical outlet in at least one electrical network may include a plug contact. Electrical outlets may be designed as plug contacts in the wiring harness, into which electrical contacts can be inserted to establish an electrical connection. Procedure 200 can be performed by means of a computer program. This computer program includes instructions that, when executed by a computer, cause it to execute procedure 200. The commands mentioned above can be stored on a computer-readable storage medium. This computer-readable storage medium includes instructions that, when executed by a computer, cause it to execute procedure 200. Procedure 200 can be implemented as an algorithm that can be executed by a program code of a computer program on a computer or processor, for example, a control computer of a test system, of a test system. Fig. 4 shows a schematic representation of a test system 400 according to the invention for testing the insulation of a plurality of electrical networks of a cable bundle with each other. The procedure 200 described above can be implemented using test system 400. Test system 400 is used for insulation testing of a plurality of electrical networks, for example, networks 11, 12, 13, 14 described in Figure 3, from a cable bundle to each other, where each electrical network 11 comprises a group of electrical contacts 111, 112, 113, 114, which are connected to each other via electrical lines 121, 122, 123, 124, as shown in Figures 2a, 2b, 2c and 3. Test system 400 comprises a system component 401 for grouping the plurality of electrical networks 11, 12, 13, 14 into a first group of electrical networks 21 and a second group of electrical networks 22 according to a grouping scheme. The test system 400 comprises a system component 402 for applying a first electrical potential 141 to a first contact of the electrical contact group of each electrical network of the first network group 21 and for applying a second electrical potential 142, which is different from the first electrical potential 141, to the remaining contacts of the electrical contact group of each electrical network of the first network group 21, as well as to all contacts of the electrical contact group of each electrical network of the second network group 22. The test system 400 includes a system component 403 for testing the current flow 150 in the contacts of the second network group 22 connected to the second potential 142. The test system 400 further comprises a system component 404 for detecting electrical isolation between the electrical networks of the second group of networks 22 and the electrical networks of the first group of networks 21, if the check of the contacts of the second group of networks 22 connected to the second potential 142 has revealed in each case that no current flows. List of references 100, 200 Procedure for the insulation test of electrical networks 11, 12, 13, 14 First, second, third and fourth net or A, B, C, D 15, 16, 17, 18 Fifth, sixth, seventh and eighth network or E, F, G, H 110a Algorithm for distributing or grouping networks into groups of networks 21 First group of networks or first group 22 Second group of networks or second group 110b Electrical Measurement Process 211 First stage, stage 1 212 Second stage, stage 2 213 Third stage, stage 3 111, 112, 113 First, second and third electrical contacts 114, 115 Fourth and fifth electrical contact 121, 122, 123 First, second and third electrical connection lines 124 Fourth electrical connection line 120 Electrical neutral point 130 Terminal block 141 First electric potential, e.g., mass 142 Second electric potential, for example, reference potential with respect to ground 150 Current flow 400 Test system for the insulation testing of electrical networks 401 System component for grouping 402 System component for connection 403 System component for testing 404 System component for detection

Claims

1. Procedure (200) for testing the insulation between a plurality of electrical networks (11, 12, 13, 14) of a cable bundle, wherein each electrical network (11, 12, 13, 14) comprises a group of electrical contacts (111, 112, 113, 114), which are connected to each other through electrical lines (121, 122, 123, 124); wherein the procedure comprises the following: grouping the plurality of electrical networks (11, 12) into a first group of electrical networks (21) and a second group of electrical networks (22) according to a grouping scheme, wherein the grouping scheme performs a first grouping of the electrical networks (11, 12) in a first stage (211) and a second grouping of the electrical networks (11, 12) in a second stage (212), which is different from the first grouping, and the grouping scheme performs in additional stages (213) respectively additional groupings of the electrical networks (11, 12),that differ from the previous groupings; connect a first electrical potential (141) to a first contact (112) of the electrical contact group of each electrical network of the first group of networks (21) and connect a second electrical potential (142), which is different from the first electrical potential (141), to the remaining contacts (111, 113, 114) of the electrical contact group of each electrical network of the first group of networks (21), as well as to all the electrical contacts (111, 112, 113, 114) of the electrical contact group of each electrical network of the second group of networks (22); check the current flow (150) of the electrical contacts (111, 112, 113, 114) of the second group of networks (22) connected to the second electrical potential (142); and detect electrical isolation between the electrical networks of the second group of networks (22) and the electrical networks of the first group of networks (21),in the event that the check of the contacts of the second group of networks (22) connected to the second electrical potential (142) has respectively revealed that no current flows (150), wherein the connection of the electrical potentials, the check of the contacts of the second group of networks to detect current flow, and the detection of electrical insulation are repeated for the second stage (212) and for subsequent stages (213), until there are no more groupings that differ from the previous groupings.

2. Method (200) according to claim 1, wherein the plurality of electrical networks (11, 12) comprises a number of electrical networks (11, 12) that is a power of two; and wherein the connection of the electrical potentials (141, 142), the check of the contacts of the second group of networks (22) to detect current flow (150), and the detection of electrical insulation are carried out respectively for a number of stages (211, 212,213), which corresponds to the exponent of the power of two.

3. A method (200) according to any of the preceding claims, wherein the grouping scheme performs a uniform grouping, in which the first group of networks (21) and the second group of networks (22) comprise the same number of electrical networks (11, 12) or in which the respective numbers do not differ from each other by more than one.

4. A method (200) according to any of the preceding claims, wherein the connection of the first electrical potential (141) and the connection of the second electrical potential (142) to the respective contacts of a network of the first group of networks (21) are performed simultaneously, successively, or in groups.

5. A method (200) according to any of the preceding claims,wherein the connection of the first electrical potential (141) and the connection of the second electrical potential (142) to the respective contacts of a second network (12) of the first group of networks (21) is carried out simultaneously or after the connection of the first electrical potential (141) and the connection of the second electrical potential (142) to the respective contacts of a first network (11) of the first group of networks (21).

6. Method (200) according to any of the preceding claims, wherein the connection of the second electrical potential (142) to the respective contacts of a network (13) of the second group of networks (22) is carried out simultaneously or after the connection of the second electrical potential (142) to the respective contacts of a network (11) of the first group of networks (21).

7. Method (200) according to any of the preceding claims,wherein the first electrical potential (141) is a ground potential; and wherein the second electrical potential (142) is a reference potential, which is generated by applying a reference voltage or a reference current.

8. A method (200) according to any of the preceding claims, comprising: checking the current flow of the contacts of the first group of networks (21) connected to the second potential (142); and detecting the integrity of the electrical networks (11, 12) of the first group of networks (21), in the event that the check of the contacts of the first group of networks (21) connected to the second potential (142) has respectively resulted in a current flow.

9. A method (200) according to any of the preceding claims,comprising: switching the second electrical potential (142) to the first electrical potential (141) at a first contact (111) of the electrical contact group of each electrical network of the second network group (22); checking whether there is current flow in the contacts of the second network group (22) connected to the second potential (142); and detecting the integrity of the electrical networks of the second network group (22), in the event that the check of the contacts of the second network group (22) connected to the second potential (142) has respectively resulted in current flow.

10. Method (200) according to any one of the preceding claims, wherein at least one electrical contact of at least one electrical network comprises a plug contact.

11. Computer program, comprising instructions that, when executed by a test system (400) according to claim 13,cause it to execute the procedure (200) according to any one of claims 1 to 10.

12. Computer-readable storage medium comprising instructions that, when executed by a test system (400) according to claim 13, cause it to execute the procedure (200) according to any one of claims 1 to 10.

13. Test system (400) for insulation testing of a plurality of electrical networks (11, 12) of a cable bundle with each other, wherein each electrical network (11) comprises a group of electrical contacts (111, 112, 113, 114), which are connected to each other via electrical lines (121, 122, 123, 124); wherein the test system comprises the following: a system component (401), which is configured to group, by means of a distribution algorithm (110a), the plurality of electrical networks (11,12) in a first group of electrical networks (21) and a second group of electrical networks (22) according to a grouping scheme, wherein the grouping scheme performs a first grouping of the electrical networks (11, 12) in a first stage (211) and a second grouping of the electrical networks (11, 12) in a second stage (212), which is different from the first grouping, and the grouping scheme performs in additional stages (213) respectively additional groupings of the electrical networks (11, 12), which differ from the previous groupings; a system component (402) for connecting a first electrical potential (141) to a first contact of the electrical contact group of each electrical network of the first group of networks (21) and for connecting a second electrical potential (142), which is different from the first electrical potential (141), to the remaining contacts of the electrical contact group of each electrical network of the first group of networks (21),as well as to all contacts of the electrical contact group of each electrical network of the second network group (22); a system component (403) for checking the current flow (150) in the contacts of the second network group (22) connected to the second potential (142); and a system component (404) for detecting electrical isolation between the electrical networks of the second network group (22) and the electrical networks of the first network group (21), in case the checking of the contacts of the second network group (22) connected to the second potential (142) has respectively revealed that no current is flowing, wherein the system is configured for the connection of the electrical potentials, the checking of the current flow in the contacts of the second network group and the detection of electrical isolation for the second stage (212) and for subsequent stages (213), until there are no more groupings that differ from the previous groupings.

Images