CN212514945U - General type medical treatment of voltage insulation fault positioning system - Google Patents
General type medical treatment of voltage insulation fault positioning system Download PDFInfo
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- CN212514945U CN212514945U CN202021079937.XU CN202021079937U CN212514945U CN 212514945 U CN212514945 U CN 212514945U CN 202021079937 U CN202021079937 U CN 202021079937U CN 212514945 U CN212514945 U CN 212514945U
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Abstract
The utility model relates to an insulating fault positioning system of general type medical treatment of voltage, including insulating monitor, signal generator module and insulating fault positioning module, belong to the insulating fault positioning field of medical IT system. The positioning signal is generated by the signal generator and is not influenced by the voltage of the system to be tested, so that the positioning signal can be applied to alternating-current single-phase IT systems with different voltage levels, and meanwhile, when the insulation fault positioning instrument is matched with the insulation fault positioning instrument for use, the specific line on which the fault occurs can be indicated, and convenience is brought to the troubleshooting of subsequent faults.
Description
Technical Field
The utility model relates to an insulating fault location system of general type medical treatment of voltage belongs to the insulating fault location field of medical IT system.
Background
Under the prior art, the medical insulation fault location can be quickly started and located after the system has the first insulation fault, and the medical insulation fault location method is very significant for places where power failure troubleshooting is not allowed like various intensive care units.
At present, most insulation fault positioning products can only position a loop where a fault is located, and cannot indicate which line (L1 or L2) the fault specifically occurs in, so that more convenience cannot be brought to follow-up fault troubleshooting.
Meanwhile, the positioning signals of most insulation fault positioning products are generated by system voltage, and the following defects exist: 1. when the voltage of a system to be measured changes, the positioning accuracy is easily influenced, even the positioning is not good; 2. if the device is developed for an alternating-current 220V single-phase medical IT system, the device cannot be applied to a 110V or 127V system.
For example, chinese patent publication No. CN206684282U discloses a laboratory isolation power supply insulation fault positioning system, which includes an isolation transformer and a laboratory bench; the isolation transformer is sequentially connected with an insulation monitor and an external alarm in series, the external alarm is also connected with an alarm display, the laboratory bench is connected with a laboratory control room, and the laboratory control bench is connected with the insulation monitor; the isolation transformer is also sequentially connected with the insulation fault tester and the insulation fault locator in series through the current transformer; the experiment table comprises a plurality of load circuits which are all connected with the insulation fault tester in parallel, the load circuits are all provided with switches and positioning transformers, and the positioning transformers on the load circuits are all connected with the insulation fault locator.
Above-mentioned patent can find the trouble just sends the warning rapidly and fixes a position, provides a safe experiment platform for the experimenter, protection personal safety and equipment safety, has certain improvement effect to the teaching, but just can fix a position the return circuit that the trouble takes place and can't specifically fix a position the circuit equally, because the locating signal is produced by system voltage to different system voltages simultaneously, consequently there is not applicable problem.
Therefore, it is urgent to develop a voltage-universal medical insulation fault locating system capable of indicating a fault line.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem of proposing in the above-mentioned background problem, provide an insulating fault positioning system of general type medical treatment of voltage, it not only can indicate that the trouble specifically takes place in which circuit, can also be suitable for different system voltages.
The purpose of the utility model is realized like this: a voltage universal medical insulation fault positioning system comprises an insulation monitor, a signal generator module and an insulation fault positioning module
The signal generator module consists of an R1 voltage-dividing resistor, an S3 relay, an R3 voltage-dividing resistor, an R4 voltage-dividing resistor, an S4 relay and an R2 voltage-dividing resistor which are sequentially connected in series, one end of the signal generator module is connected with a secondary output power line of the L1 isolation transformer, and the other end of the signal generator module is connected with a secondary output power line of the L2 isolation transformer;
an S1 relay is further arranged on the R1 voltage-dividing resistor in parallel, and an S2 relay is further arranged on the R2 voltage-dividing resistor in parallel;
the circuit between the R3 voltage-dividing resistor and the R4 voltage-dividing resistor is connected with an S5 conversion relay through a lead, two conversion circuits are arranged below the S5 conversion relay in a matching mode, one conversion circuit is provided with an R5 sampling resistor and is grounded, the other conversion circuit is provided with an MCU, and the other side of the MCU is connected between the S5 conversion relay and the R5 sampling resistor through a line;
the insulation fault positioning module comprises an insulation fault positioning instrument, and a plurality of mutual inductors are connected and mounted on the insulation fault positioning instrument;
and a plurality of load circuits are further arranged on the secondary output power line of the L1 isolation transformer and the secondary output power line of the L2 isolation transformer in parallel, one end of each load circuit is connected with the secondary output power line of the L1 isolation transformer, and the other end of each load circuit is connected with the secondary output power line of the L2 isolation transformer.
The positioning signal sent by the signal generator module is an alternating voltage signal.
Compared with the prior art, the utility model has the advantages of it is following:
the utility model discloses an insulating fault positioning system of general type medical treatment of voltage, ITs locating signal is produced by signal generator, is not influenced by the system voltage of being surveyed, consequently can be applied to the single-phase IT system of interchange of different voltage classes, when the trouble takes place, can indicate out the trouble and specifically take place at which circuit simultaneously, offers convenience for the investigation of follow-up trouble.
Drawings
Fig. 1 is a schematic circuit diagram of the utility model of a general medical insulation fault location system for voltage.
Fig. 2 is an equivalent circuit diagram of the embodiment 1 of the voltage-universal medical insulation fault location system according to the present invention.
Detailed Description
The invention is described below with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1-2, a voltage universal medical insulation fault positioning system comprises an insulation monitor, a signal generator module and an insulation fault positioning module;
the signal generator module consists of an R1 voltage-dividing resistor, an S3 relay, an R3 voltage-dividing resistor, an R4 voltage-dividing resistor, an S4 relay and an R2 voltage-dividing resistor which are sequentially connected in series, one end of the signal generator module is connected with a secondary output power line of the L1 isolation transformer, and the other end of the signal generator module is connected with a secondary output power line of the L2 isolation transformer;
an S1 relay is further arranged on the R1 voltage-dividing resistor in parallel, and an S2 relay is further arranged on the R2 voltage-dividing resistor in parallel;
the circuit between the R3 voltage-dividing resistor and the R4 voltage-dividing resistor is connected with an S5 conversion relay through a lead, two conversion circuits are arranged below the S5 conversion relay in a matching mode, one conversion circuit is provided with an R5 sampling resistor and is grounded, the other conversion circuit is provided with an MCU, and the other side of the MCU is connected between the S5 conversion relay and the R5 sampling resistor through a line;
the insulation fault positioning module comprises an insulation fault positioning instrument, and a plurality of mutual inductors are connected and mounted on the insulation fault positioning instrument;
a plurality of load circuits are further arranged on the secondary output power line of the L1 isolation transformer and the secondary output power line of the L2 isolation transformer in parallel, one end of each load circuit is connected with the secondary output power line of the L1 isolation transformer, and the other end of each load circuit is connected with the secondary output power line of the L2 isolation transformer;
the positioning signal sent by the signal generator module is an alternating voltage signal.
In this embodiment, the working method of the present invention is as follows:
after the voltage universal medical insulation fault positioning system is installed, the R6 insulation resistance and the R7 insulation resistance exist in the system;
when the L1 line in the loop 1 has insulation fault, the insulation resistance of R6 is reduced; when the insulation monitor monitors that an insulation fault exists in the system, a positioning command is sent to the signal generator module;
after receiving the command, the signal generator firstly judges which line of the L1 and the L2 has the insulation fault, and the specific steps are as follows:
the first step is as follows: s1, S2 and S4 are disconnected, S3 is closed, S5 is switched to a loop where R5 is located, at the moment, L1- > R1- > R3- > R5- > R7- > L2 forms a loop, and a sampling signal UL1 obtained from R5 is transmitted to the MCU and recorded. The R1 and R3 divider resistors have the function of avoiding the phenomenon that the voltage divided by the R5 sampling resistor is too large to damage a rear-stage circuit or cause signal saturation because the resistance value of the R7 insulation resistor is too small;
the second step is that: s1, S2 and S3 are disconnected, S4 is closed, S5 is switched to a loop where R5 is located, at the moment, L1- > R2- > R4- > R5- > R6- > L2 forms a loop, and a sampling signal UL2 obtained from R5 is transmitted to the MCU and recorded;
according to the assumption, R7 is high resistance value in the first step, so the UL1 value of the sampled voltage is very small; in the second step, because the L1 has insulation fault, the R6 has low resistance value, and the sampling voltage UL2 is relatively large; at this time, by performing comparative analysis processing on UL1 and UL2, it can be determined which line has an insulation fault.
And then judging which loop has insulation fault, wherein a positioning signal is generated by a signal generator and is not influenced by the voltage of the system to be tested, and the specific steps are as follows:
according to the steps, the L1 line is judged to have insulation fault, then S1 and S3 are closed, S2 and S4 are disconnected, and S5 is switched to a signal injection loop, and an equivalent circuit diagram is shown in figure 2.
In this embodiment, the positioning signal sent by the signal generator is an ac voltage signal, and to avoid affecting the system, the peak value is limited to be within 25V.
In the present embodiment, R3 acts as a current limiting resistor at this time, limiting the positioning current to within 1mA of peak value.
In this embodiment, the insulation fault location module implements fault location by analyzing and processing the current in the loop detected by the transformer, and at this time, the resistance value of the R6 insulation resistor is small, and the current flowing through the loop 1 is the largest, so the fault location module locates the loop 1.
The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (2)
1. The utility model provides a general type medical treatment insulation fault positioning system of voltage, includes insulating monitor, its characterized in that: the device also comprises a signal generator module and an insulation fault positioning module;
the signal generator module consists of an R1 voltage-dividing resistor, an S3 relay, an R3 voltage-dividing resistor, an R4 voltage-dividing resistor, an S4 relay and an R2 voltage-dividing resistor which are sequentially connected in series, one end of the signal generator module is connected with a secondary output power line of the L1 isolation transformer, and the other end of the signal generator module is connected with a secondary output power line of the L2 isolation transformer;
an S1 relay is further arranged on the R1 voltage-dividing resistor in parallel, and an S2 relay is further arranged on the R2 voltage-dividing resistor in parallel;
the circuit between the R3 voltage-dividing resistor and the R4 voltage-dividing resistor is connected with an S5 conversion relay through a lead, two conversion circuits are arranged below the S5 conversion relay in a matching mode, one conversion circuit is provided with an R5 sampling resistor and is grounded, the other conversion circuit is provided with an MCU, and the other side of the MCU is connected between the S5 conversion relay and the R5 sampling resistor through a line;
the insulation fault positioning module comprises an insulation fault positioning instrument, and a plurality of mutual inductors are connected and mounted on the insulation fault positioning instrument;
and a plurality of load circuits are further arranged on the secondary output power line of the L1 isolation transformer and the secondary output power line of the L2 isolation transformer in parallel, one end of each load circuit is connected with the secondary output power line of the L1 isolation transformer, and the other end of each load circuit is connected with the secondary output power line of the L2 isolation transformer.
2. The voltage utility type medical insulation fault locating system according to claim 1, wherein: the positioning signal sent by the signal generator module is an alternating voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202021079937.XU CN212514945U (en) | 2020-06-12 | 2020-06-12 | General type medical treatment of voltage insulation fault positioning system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021079937.XU CN212514945U (en) | 2020-06-12 | 2020-06-12 | General type medical treatment of voltage insulation fault positioning system |
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| CN212514945U true CN212514945U (en) | 2021-02-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167787A (en) * | 2021-12-10 | 2022-03-11 | 江苏安科瑞电器制造有限公司 | Insulation monitoring system capable of generating fault positioning signal for medical IT system |
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- 2020-06-12 CN CN202021079937.XU patent/CN212514945U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167787A (en) * | 2021-12-10 | 2022-03-11 | 江苏安科瑞电器制造有限公司 | Insulation monitoring system capable of generating fault positioning signal for medical IT system |
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