SU1226357A1 - Apparatus for testing serviceability of electric wiring - Google Patents

Abstract

This invention relates to instrumentation technology. The purpose of the invention is to increase the speed of the device. The device contains a measurement unit 1, a control unit 2, a synchronization unit 3, windings 4.1-4.N of main switching relays with opening contacts 4.1.1 - 4.N, 1, closing contacts 4.1.2-4. N, 2 and switching contacts 4.1.3-4.N.3, winding 5.1-5.N fikke IsD O5 oo ate

Description

relay relays with closing contacts 5.1.1-5.N.1; windings 6.1-6.N of additional switching relays with closing contacts 6.1.1. 6.N.1, opening contacts .2 - 6.N.2 and switching contacts 6,1.3-6.N.3, winding 7 of the group relay with closing 7.1, opening 7.2 and switching

The invention relates to instrumentation technology and can be used to check the health and search for defects in the installation of cabinets, racks, blocks, tows and other diagnostic objects.

The purpose of the invention is to increase the speed of the device.

FIG. 1 is a diagram of the device in FIG. 2 is a block diagram of the measurements; FIG. 3 is a control block diagram.

The device (Fig. 1) contains a measurement unit, a control unit 2, an alarm unit 3, windings 4.1-4.N of the main switching relays with opening contacts 4L. 1-4.N, 1, closed by contacts 4.1.2-4.N „2, switching contacts 4.1.3-4, N.3, windings 5.1-5.N of the latching relays with closing contacts 5i1,1- 5.N.1j of the winding 6 “1-6.N of additional switching relays with locking contacts 6.1.1-6, N.1, disconnecting contacts 6I.2-6, N.2, switching contacts 6.1.3 -6, N, 3, winding 7 of the group relay with closing 7.1, opening 7.2 and switching 7.3. contacts and diodes 8.1-8, N. FIG. The object 9 of the diagnosis is also shown with terminals 10.1-10.N and plus 11 and minus 12 supply busses of the device

Measurement unit 1 (FIG. 2) contains an analog-to-digital converter (ADC) 13.

The control unit 2 (FIG. 3) contains a matching unit 14 and a micro-computer 15 with the first 16, second 17 outputs and bi-directional outputs 18.

226357

: 7.3 contacts, diodes 8.1-8, N, diagnosis object 9 with terminals 10.1-10N and positive 11 and minus 12 power supply lines of the device. The achievement of this goal is facilitated by the introduction of an additional switching device, a group of relays and diodes. 2 hp f-ly, 4 tab. 3 il.

The first outputs of the control unit 2 are connected to the first and second terminals of the windings 4.1-4. N main switching relays, second outputs - with the inputs of the alarm unit 3, the first inputs - with the outputs of the measurement unit 1, the second input. Through the serially connected make contacts 5.1.1-5, N о 1 fixed relay relays - with the first winding terminals 5, 1-5, N latching relays. The opening contacts 4.1.1-4.N, 1 of the main switching relays are interconnected. The closing contacts 4.1,2-4, N.2 of the main switching relays are interconnected. The first and second outputs of the windings 6,1-6.N and 7 additional switching and group relays are connected to the corresponding first outputs of the control unit 2, switching the contacts 6.1.3-6, 3, 3 of each of the additional switching relays, are connected to the corresponding terminals for connecting the diagnostics object outputs, their shorting contacts 6.1.1-6.N.1 are connected to the closing contact 7.1 of the group relay, disconnecting contacts 6.1.2-6.М „2 are connected to the second terminals of the windings 5.1-5 .N corresponding latching relays with anodes corresponding to the diode 8.1-8.N, the cathodes of which are connected to the switching contacts 4.1 "3-4. M. Of the corresponding main switching relays, the spreading contacts of which are connected to the disconnecting contact 7.1 of the group relay, the switching contact 7.3 of which is connected to the input of the measuring unit, negative power bus 12 is connected to make contacts 4, .2-4.N.2 of the main comm3

mutation relays, plus igana 11 power supply - with the first transistors of 5.1-5.N windings of the latching relays.

In unit 1 of measurements, the ADC 13 is connected by outputs to the outputs of unit 1 of measurement, the first input to the input of unit 1 of measurement, the second input to the positive power supply bus 11 of the device.

In control unit 2, microcomputer 15 is connected to the first 16, second 17 outputs and bidirectional drives 18, respectively, with the first, second inputs and bidirectional outputs of the matching unit 1A, connected by the first and second outputs, first and second inputs, respectively, to the same outputs and inputs unit 2 controls.

As a micro-computer 15 in block 2, the controller can be used Electronics K1-20, imendey 16 address buses and 8 buses I / o information. As an agreement block 14, multifunctional buffer registers (ICBM) K 589 IL 12 can be used, each of which has 8 inputs and outputs. A microcomputer can be connected with 256 ICBMs for output and 256 ICBMs for entering information. This allows using these devices to connect 1000 primary and additional switching relays to the first outputs of the control unit 2 of the device to verify the electrical installation.

As an ADC 13, a standard ADC voltage can be used.

code.

The device for checking the health of electrical installation works in two modes: the mode of checking the health and the mode of localizing defects.

In the health check mode, the device monitors the correctness of the electrical installation, i.e. the presence of all the necessary connections between the terminals inside the installation groups, the absence of unnecessary connections, as well as the isolation level between the installation groups, including between the insulated terminals, between the installation groups and the insulated terminals, to the standard value.

, five

2263574

In the initial state, all relays of the device are turned off, and their closing contacts are open, and the opening contacts are closed (figure 1). The micro-5 computer 15 of block 2 is in the state of descending. Terminals 10.1-10.11 of the object 9 of the diagnosis through the disconnecting contacts 6.N.1-6.N.2 and 4.N.3-4.N.2 of the main and additional switching O and through the disconnecting contact 7.2 of the group relay 7 are connected to the input of block 1, i.e. the first input of the ADC 13 (figure 2).

In the health check mode 15 After connecting the diagnosis object 9 to the device, the operator from the control panel should access the micro-computer 15 by typing the number of the diagnosis object on the keyboard of the control panel. The microcomputer 15 voyage-20 receives commands from the console as an exit signal from the idle state and identifies the incoming number with the verification program that corresponds to the given object.

The program for checking the health of electrical installation includes the following information: the standard insulation resistance for a given object of diagnosis; test of electrical installation for power failure; test of electrical installation for the absence of messages.

thirty

,five

0

five

0

Normative insulation resistance is encoded in binary code. 5 Tests consist of separate sets that contain commands to bring relays 4.1, ..., 4.N, 6.1, ..., 6.M and 7 to the states that they must have in accordance with what is performed on This set is verified. Each test set contains several machine layers, including both the addresses of the outputs of the matching block 14, through which commands are entered, and the commands themselves, which control the on or off of the corresponding relays

Issuing a command begins with the microcomputer 15 at its outputs 16 generating the address of that first output of block 14 to which the relay coil is connected, the state of which,. should change during this health check phase. Then the microcomputer 15 at its pins 18 generates a control word containing (the command to turn on the relay) or O (the command to turn off the relay) in the order to which this

five

output. Next, the microcomputer 15 produces the Output command, according to which the control word, via the corresponding output of the block 2, acts on the required switching relay.

Table 1 shows a test that checks the operability of the electrical installation, shown in Figure 1, for obrish, in Table 2 - the test, the test is the same

test set, etc. If, on this set, the second input of block 2 of signal 1 does not arrive, the micro-computer 15 fixes a defect in the electrical installation - an open circuit, stops the operation of the device and turns on the corresponding indication in block 3. For this, the micro-computer 15 is similar to the output of commands to turn on the relay Generated by the absence of messages. (It arrives at its second outputs for informing that the mounting of relays 6,1, ..., 6. M and 7 are in the off state). In this case, the sign 1 means a command to turn on the corresponding relay, as well as a signal arriving at the terminal from the negative bus 12 of the power supply.

For example, on the set No. 1 (Table 1) of the test of the test for block 2, it includes relays 4.1, 4.2, 4.3 and 4.7. In this case, the relays with the windings 5.1, 5.2, 5.3 and 3.7 are applied, closing their contacts 5.1.1, 5.2; 1, 5.3.1 and 5.7.1. Minus bus 12 power supply through closing contacts 4.1.2, 4.2.2, 4.3.2 and 4.7.2 of the main switching relays with windings 4.1, 4.2, 4.3 and 4.7, opening contacts 6.1.2, 6.2.2, 6.3.2 and 6.7.2 additional switching relays with windings 6.1, 6.2, 6.3 and 6.7 are connected to test terminals 10.1, 10.2, 10.3 and 10.7. If there are connections between terminals 10.1-10.6, 10.6-10.10, 10.2-10.4, 10.4-10.5, 10.5-10.9, 10.3-10.8, 10.8-10.N, the negative potential from the test terminals goes to the remaining terminals of the diagnosis object 9 . Then the latching relays with windings 5.4, 5.5, 5.6, 5.8, 5.10 and 5.N and their corresponding contacts 5.4.1, 5.5.1, 5.6.1, 5.8.1, 5.10.1, 5.N.1 are closed. As a result, a positive potential (logical 1 signal) from the plus bus {1 power supply through the closed contacts of all latching relays goes to the second input of unit 2. The micro-computer 15 (figure 3), in accordance with the testing program, generates the address of the second input of unit 2 and the command The input by which the signal from this input to the outputs t7 enters the microcomputer 15. If this signal is 1, the microcomputer 15 fixes the health of the tested-on this set of connections, forms the following

test set, etc. If, on this set, the second input of block 2 of signal 1 does not arrive, the micro-computer 15 fixes a defect in the electrical installation - an open circuit, stops the operation of the device and turns on the corresponding indication in block 3. For this, the micro-computer 15 is similar to the output of commands to turn on the relay works out on its second outputs infor5

0

ABOUT

five

WITH

five

five

a word containing the number of the cycle on which the defect was fixed, after which it goes into standby mode

In block 3, the indicators will be turned on, according to which the operator working with the device determines the number of the test set. Using the dictionary of defects, one can determine, by the number of the kit, which mounting chains were checked at the moment of fixing the defect, as well as the type of defect.

In the simultaneous control of all circuits for an open, a diode 8.6, for example, does not pass a negative potential from terminal 10.1 through contacts 6.6.3 and 6.6.2 to the connection point of the cathodes of all diodes 8.1-8.N, which would result (in the absence of diodes 8.1 -8.N) to build all the fixed relays and to issue a false result of the validity of all circuits in block 2.

In order to localize the crash site with an accuracy of two terminals, between which there is no conductor, the device must go to the test for finding the crash site. In the event that the electrical installation is oTcyTCTBytoT, the device performs a check for no messages in it.

At the end of the test set for checking the electrical installation for disconnection, the insulation level of one of the mounting groups is monitored with respect to the other terminal groups of the object 9 of the diagnosis. Thus, on the set No. 1 of this test (Table 2), the isolation level of the mounting group 10.1, 10.6, 10.10J on the set is checked (Р 2 - groups 10.2, 10.4, 10.5, 10.9, on set No. 3 - groups 10.3, 10.8 10.N; on set No. 4 - groups (terminals) 10.7.

For example, when implementing the set No. 1 of this test, unit 2 turns on a relay with windings 4.1, 4.6 and 4.10. With

this through the closing contacts 4,1.2 4,6.2 and 4,10.2 of these relays, the opening contacts 6,1,2, 6,6,2 and 6,10,2 additional switching relays with windings 6,1, 6,6 and 6 , 10 the voltage from the negative bus 12 power is applied to the terminals 10.1, 10.6 and 10.10. The remaining terminals, for example 10.2, through the corresponding contacts 6,2,3 and 6,2,2 additional switching relays, diode 8.2, contacts 4,2,3 and 4,2,1 and through the contact 7,2 of the group relay remain connected to the input of block 1, the ADC 13 of block 1 (FIG. 2) converts the voltage applied to its first input, the value of which inversely proportional the insulation resistances between this assembly group and the remaining assembly groups of the object 9 of the diagnosis, in binary code. In this case, it is considered that the inverse resistance of the diode 8.2 is much less than the measured insulation resistance and, therefore, the diode 8.2 does not affect the measurement result. The code from output A1SCH 13 of block 1 is transmitted to the first input of block 2,

The microcomputer 15 according to the program generates the address of the second input of block 2 at outputs 16 and the Enter command, according to which a binary code containing information about the insulation resistance between the controlled groups is entered into the microcomputer 15 of block 2, Micro -Computer 15 compares the value obtained with the standard. If the insulation is normal, then block 2 forms the next set of testing test. If not, it stops the operation of the device and turns on the corresponding indication in block 3,

After that, it is necessary to proceed to the test of searching for the location of the message.

To locate the defect location in the device, a defect finding test is used. It consists of two parts: the test of the search for breaks, the test of the search for messages.

The transition to the implementation of tests can be performed automatically according to the work program of the microcomputer 15 of unit 2, or at the operator's command from the console after stopping the operation of the device when the defect is fixed during the operability check of electrical installation. Localization of the area between the terminals of the electric mon10

15

0

five

0

five

WITH

five

five

It is completed with an accuracy up to two terminals of the assembly group, between which the required connection is missing, and the places of low insulation resistance - with an accuracy of up to two assembly groups,

Table 3 shows the test of finding openings between the terminals of all mounting groups, and Table 4 shows the possible messages of the mounting group 10.1, 10.6, 10.10 with the remaining terminals of the object 9 of the diagnosis shown in FIG. 1, Tables 3 and 4 use the same notation as Tables 1 and 2.

A set of no. 1 test of the search for obrbs (Table 3) allows detecting an open (no connection) between terminal 10.1 and terminals 10.6 and 10.10. To this end, block 2 sends commands to turn on the relay with windings 4.1, 4, 2, 4.3, 4.4, 4.5, 4.7, -4.8, 4.9 and 4, N, At the same time, the negative potential of the power supply bus 12 is through the make contacts of these main switching relays and through the opening contacts of the corresponding Additional switching relays are supplied to the terminals 10.1, 10.2, 10.4, 10-5, 10.9, 10.3, 10.8, 10, N and 10.7 of the diagnosis object 9, respectively. Consequently, the latching relays with otkami 5.1, 5.2, 5.3, 5.4, 5.5, 5.7, 5.8, 5,9i5. their contacts are included 5.1.1, 5.2.1, 5,3,1, 5,4,1, 5,5,1, 5,7.1, 5.8,1, 5,9,1 and 5, N, 1 are closed . Since no voltage is applied to terminals 10.6 and 10.10, the corresponding latching relays with windings 5.6 and 5.10 will be connected only if there is a connection between terminal 10.1 and terminals 10.6 and 10.10 . If the specified connection is absent, then according to the indication of unit 3, t, e, according to the number of the set of the test for finding a defect by means of. With the dictionary of defects, it is possible to identify those terminals of the assembly group between which the required connection is missing.

To determine the j -th terminal group, in which with the tested t -th group there is a lower insulation resistance (,,,,, n, at is the number of terminal groups of the object 9), the microcomputer 15 of the unit 2 performs the commands to turn on corresponding to i group

additional switching relays with 6.1-6.N windings and a group relay

For example, if the partial insulation resistance was detected on the first set of the test of the electrical installation (Table 2) 5, this means that there is a message between the terminal group 10.1 10.6, 10.10 and one or several kimz other terminal groups. Therefore, the microcomputer 15 generates commands to turn on the relay with windings 6,1,6.6, 6,10 and 7. At the same time, the terminal group is faulty via make contacts

6.1.1,6.6,1s 6.10.1 and the closing contact 7.1 of the group relay will be connected to the input of block 1.

The first set of the message search test (Table 4) contains the commands to turn on the relay with windings 4.2, 4.4, and 4.9. With the closure of the closure contacts corresponding to this relay

4.2.2,4.4.2, 4.5.2 and 4.9.2 negative potential with negative bus

12 power is supplied to terminals 1 10.2, 10.4, 10.5, 10.9 of the object 9 Block 1 performs measurement of the insulation level between terminal groups 10.1, 10.6, 10.10 and 10.2, 10.4, 10.5, 10.9, Block 2 compares it with the standard . If the insulation is correct, block 2 generates a follow-up set on which the insulation is checked by isolating the terminal groups 10.1, 10.6, 10.10 and 10.3, 10.8, 10.5, and so on. If the insulation is below normal, block 2 stops operation device and turns on the display in block 3,

Based on the indication of unit 3 - the number of the defect finding test set, it is possible to determine the jth group that has a message with the 1st group.

After the second defective group will be fixed by the operator, the device, upon its command, will continue to submit test search message sets, will reveal all other (j +1, ..,, h) groups that have the first (i-th) place low insulation resistance.

Length L; the search test for all messages between the 1st order terminal group and the rest of the terminal groups is determined by

,

where n is the number of terminal groups.

The maximum length of a message search test is that of the installation group in

S

0

50

5 ®

L

five

The proposed device is determined by phasing. For example, the number of test sets for searching messages of the first group of terminals () for electrical installation, containing 11 mounting groups, is 100 times less than in a known device, where the number of sets is 2 2 1024.

The introduction of diodes 8.1-8 "N allows, in the control mode, for the near hit of the voltage level of bus 12, set to the first terminals of the monitored circuits (10-1, 10.2, 10.3 and 10.7), to the windings of relays 5.4, 5.6 , 5.8, 5.9, 5.10, 5.M only through the controlled circuits and their terminals 10.4, 10.6, 10.8, 10.9, 10.10 and 10. NS eliminates the possibility of switching on the relay with windings 5.4, 5.6, 5.8 , 5.9, 5-10 and 5, Mot hitting the voltage level of bus 12 on all switching contacts 4,1.1-4,, М „1 through one of them (if, for example, diodes V., 1-8, М is short-circuited), that allows you to simultaneously monitor all circuits for an open circuit to perform the speed of the proposed device relative to the known, where the discovery of the T15 condition is consistent with the switching time of the relay with windings 4,, Io The introduction of the relay with windings 6 and 7 allows you to monitor the presence of each i-group .I object in localization mode 9 with any other j –and terminal groups, excluding –– this does not affect the result of monitoring all other terminal groups with | ioMepai-iH. i and j 5 that cannot be done in a known device, where it is impossible to select a pair of 4 and j terminals independent of DSP and CID. This feature allows reducing the number of test sets in: necessary for localizing the 1.1c circuit with the limestone device to P-1 , which significantly improves the speed of the device.

Claims (3)

Invention Formula 1. Device for checking the health of electrical installation, containing: - a driving control unit connected by the corresponding first outputs to the first and second windings of the main switching relays, and the second outputs to the inputs of the signal unit the first inputs are from the outputs of the measuring unit, the second input through series-connected closing contacts of the locking relays is to the first terminals of the windings of the holding relays, the closing contacts of the main switching relays interconnected, the closing contacts of the main switching relays connected by themselves, characterized in that In order to improve the device speed, additional switching relays, a group relay and diodes are introduced into it, with the first and second windings of the additional switching The main and group relays are connected to the corresponding {first} outputs of the control unit, switching contacts of each of the additional switching relays are connected to the corresponding terminals for connecting the outputs of the object of diagnosis, their closing contacts are connected to the contact of the group relay, soaking contacts are connected to the second winding terminals of the corresponding contacts latching relays and with the anodes of the respective diodes, the cathodes of which are connected to the switching contacts of the respective terminals 0 five 0 five the main switching relays, the breaking contacts of which are connected to the breaker contact of the group relay, the switching contact of which is connected to the input of the measuring unit, the negative power bus is connected to the closing contacts of the main switching relays, 2. The device according to claim 1, characterized in that the measurement unit contains an analog-to-digital converter connected by outputs with the outputs of the measuring unit, the input with the input of the measuring unit, and the second input with the positive power supply bus of the device. 3. The device according to claim 1, characterized in that the control unit contains a micro-computer connected by first and second outputs and bidirectional outputs, respectively The first and second inputs and the bidirectional outputs of the matching unit connected by the first and second outputs and the first and second inputs respectively with the same outputs and inputs of the control unit. Table 1 Dial Number Relay 4.1 I 4.6 TA.10 I 4.2 TA. I 4.5 Td.9 U.S | 4.8 GA. M TA. Terminal Object 9 10.ll 10.6 I 10.10 10.2 .10.4 10.5 I 10.9 I 10.3 I 10.81 10.V N0.7 one LTD 1 о о о 1 о о о o 1 o o o 1 o o 1 o about 1 1 1 1 1 1 1 about 1 about 1 1 1 1 1 1 1 about o 1 1 1 1 1 1 1 1 one one one one about about about one one one 1 1 about 1 about about 1 1 1 table 2 about 1 oh oh about about 1 about oh oh 1 o about about 1 about about about about 1 Table 3 1 1 1 о о о 1 1 1 1 1 1 1 1 1 1 1 1 about 1 1 1 1 1 1 1 about 1 about eleven eleven 1 1 1 about about 1 oh oh oh oh oh oh Dial Number 4.1 4.6 14.10 I 4.2 I 4.4 J 4.5 1 4.9 - J 4.8 Terminal Object 9 10.1 I 10.b io, ioTio.2T 10.4 10.5 s. DTu.z oh oh oh oh oh Ltd one oh oh 1 about o Note: Relays 6.1, 6.6 and 6.10 are included. f / e.2 Compiled by V.Dvorkin Editor N. Yatsola Tekhred L.Oleinik Proofreader G. Reshetnik Order 2126/43 Circulation 728 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Table A 1 about o about 1 o about 1 about about 1 about about about 1 FigdHOHmgtfma