CN211719268U - Signal bypass device of reactor control system - Google Patents
Signal bypass device of reactor control system Download PDFInfo
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- CN211719268U CN211719268U CN202020350520.6U CN202020350520U CN211719268U CN 211719268 U CN211719268 U CN 211719268U CN 202020350520 U CN202020350520 U CN 202020350520U CN 211719268 U CN211719268 U CN 211719268U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model relates to a reactor control system signal bypass device belongs to nuclear power protection technical field, has solved the lower problem of current bypass device security. The bypass control circuit comprises a power supply, a channel bypass indicator light, a bypass allowing indicator light, a channel bypass switch, a bypass allowing switch, a first signal interface pair, a second signal interface pair, a first positive interface, a second positive interface and a negative interface; two ends of the channel bypass switch are respectively connected with two ends of the first signal interface pair, and two ends of the bypass allowing switch are respectively connected with two ends of the second signal interface pair; the channel bypass indicator lamp is connected between the positive polarity end of the power supply and the first positive interface in series; the bypass allows the indicator light to be connected in series between the positive polarity end of the power supply and the second positive interface. By adopting the bypass allowing switch, the false triggering of signals caused by manual misoperation is avoided, and the safety and the reliability of the bypass device are improved.
Description
Technical Field
The utility model relates to a nuclear power protection technical field especially relates to a reactor control system signal bypass device.
Background
The control system is a central nervous system for operation, operation and monitoring of the nuclear power station, is important equipment for ensuring safe and reliable operation of the nuclear power station, and helps to adjust and meet the requirements of operation and maintenance of the nuclear power station. Currently, about 40% of the operating reactors worldwide have been completely upgraded or contain partial digital control systems. At present, the nuclear power station under construction or the nuclear power station to be built uses a digital control system.
At present, the bypass devices used by partial nuclear power stations in China lack misoperation prevention protection, the problem of misoperation caused by human factors is not fully considered, the number of configurable parameters is small, the universality among systems is not flexible, and the reliability and the safety of the existing bypass devices are low.
SUMMERY OF THE UTILITY MODEL
In view of the above analysis, the present invention is directed to a signal bypass device for a reactor control system, which is used to solve the problem of low safety of the existing bypass device.
The purpose of the utility model is mainly realized through the following technical scheme:
a signal bypass device of a reactor control system comprises a power supply, a channel bypass indicator light, a bypass allowing indicator light, a channel bypass switch, a bypass allowing switch, a first signal interface pair, a second signal interface pair, a first positive interface, a second positive interface and a negative interface;
two ends of the channel bypass switch are respectively connected with two ends of the first signal interface pair, and two ends of the bypass allowing switch are respectively connected with two ends of the second signal interface pair;
the channel bypass indicator lamp is connected between the positive polarity end of the power supply and the first positive interface in series; the bypass allowing indicator lamp is connected between the positive polarity end of the power supply and the second positive interface in series;
two ends of the first signal interface pair are respectively used for being connected with two dry contact pins of a channel bypass signal input board card of the control system;
two ends of the second signal interface pair are respectively used for being connected with two dry contact pins of a bypass allowable input plate of the control system;
the first positive interface is used for being connected with a first dry contact pin of a bypass signal output board card of a channel of the control system; the second positive interface is used for being connected with a first dry contact pin of a bypass allowing signal output board card of the control system; and the negative interface is used for being connected with the second dry contact pins of the channel bypass signal output board card and the bypass allowing signal output board card respectively.
Furthermore, the system also comprises N parameter bypass indicator lamps, N parameter bypass switches, N pairs of third signal interface pairs and N third positive interfaces; wherein N is more than or equal to 1;
two ends of the N parameter bypass switches are respectively and correspondingly connected with two ends of the N third signal interface pairs;
the N parameter bypass indicator lamps are respectively connected in series between the positive polarity end of the power supply and the N third positive interfaces;
two ends of the N third signal interface pairs are respectively used for being correspondingly connected with two dry contact pins of N parameter bypass signal input board cards of the control system;
the N third positive interfaces are used for being connected with first dry contact pins of N parameter bypass signal output board cards of the control system respectively; the negative interface is also used for being connected with second dry contact points of the N parameter bypass signal output board cards.
The power supply positive polarity end is connected with the diode in series and then is respectively connected with the channel bypass indicator lamp, the bypass allowing indicator lamp and the parameter bypass indicator lamp; and one end close to the positive polarity end of the power supply is a diode anode, and one end close to the indicator light is a diode cathode.
Further, the device also comprises a light test switch and a fourth signal interface pair;
two ends of the light test switch are respectively connected with two ends of the fourth signal interface pair;
and the two ends of the fourth signal interface pair are connected with two dry contact pins of a lamp test signal input board card of the control system.
Further, the power supply adopts a redundant 24V direct current power supply.
Furthermore, the bypass device also comprises a shell, and the front surface of the shell is provided with a bypass allowing knob, a channel bypass knob and N parameter bypass knobs;
the pin of the bypass allowing knob is welded with the movable terminal of the bypass allowing switch;
the pin of the channel bypass knob is welded with the movable terminal of the channel bypass switch;
and pins of the N parameter bypass knobs are respectively welded with movable terminals of the N parameter bypass switches correspondingly.
Further, the shell also comprises a light test button, and a pin of the light test button is welded with the movable terminal of the light test switch.
Further, the back of the shell is provided with two redundant pairs of power interfaces;
each pair of the power interfaces comprises a positive polarity interface and a negative polarity interface;
the positive interface is welded with the positive end of the power supply, and the negative interface is welded with the negative end of the power supply.
Furthermore, a redundant signal interface is arranged on the back of the shell;
and the signal interfaces are respectively welded with the first signal interface pair to the fourth signal interface pair.
Further, the shell is of a 4U chassis type structure.
Compared with the prior art, the utility model discloses can realize one of following beneficial effect at least:
1. through a reactor control system signal bypass device, solved current bypass device lack prevent the maloperation protection, do not fully consider the people because of bringing the lower problem of security that maloperation etc. caused, this scheme adopts the bypass to allow the function, opens the operation permission switch before the bypass operation, has avoided the false triggering that the artificial maloperation caused the signal, has promoted bypass device's security and reliability.
2. Through N parameter bypass switches and parameter bypass indicator lamps, the problem that the number of configurable parameters of the existing bypass device is small is solved, expandability is high, the problem that more parameters need to be bypassed is solved, and reliability of the bypass device is improved.
3. Potential faults can be identified in advance by designing a light test function, and misoperation of personnel caused by misjudgment of a bypass state due to equipment faults is avoided. Meanwhile, the bypass device is periodically subjected to light test, so that the bypass state indication is ensured to be normal, and the reliability of the bypass device is improved.
The utility model discloses in, can also make up each other between the above-mentioned each technical scheme to realize more preferred combination scheme. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings.
FIG. 1 is a schematic diagram showing an internal circuit configuration of a reactor bypass apparatus according to an embodiment;
FIG. 2 is a schematic illustration of the connection of a reactor bypass device to a control system according to one embodiment;
FIG. 3 is a schematic diagram of the bypass interlock logic in one embodiment;
FIG. 4 is a schematic diagram of a bypass display in one embodiment;
FIG. 5 is a schematic front view of a bypass device according to one embodiment;
FIG. 6 is a schematic rear view of a bypass device in accordance with one embodiment.
Detailed Description
The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.
The signal bypass device is important equipment in a nuclear power station protection system, and can effectively prevent system misoperation or system operation failure caused by single equipment failure. Through bypass operation, logic operation participated by fault equipment is eliminated, and the residual redundant equipment can effectively complete the safety function. The utility model discloses a manual operation and the state display function of passageway bypass and a plurality of parameter bypass can be realized to bypass arrangement, adopt the design of pure hardware, ensure equipment safe and reliable.
The utility model discloses a specific embodiment discloses a reactor control system signal bypass device, as shown in figure 1, including power, passageway bypass pilot lamp, bypass permission pilot lamp, passageway bypass switch, bypass permission switch, first signal interface pair (A1+ and A1-), second signal interface pair (A2+ and A2-), first positive interface (B1+), second positive interface (B2+) and negative interface (B-); two ends of the channel bypass switch are respectively connected with two ends of a first signal interface pair (A1+ and A1-), and two ends of the bypass allowing switch are respectively connected with two ends of a second signal interface pair (A2+ and A2-); the channel bypass indicator lamp is connected between the positive polarity end of the power supply and the first positive interface (B1+) in series; the bypass allowing indicator lamp is connected in series between the positive polarity end of the power supply and the second positive interface (B2 +); two ends of the first signal interface pair (A1+ and A1-) are respectively used for being connected with two dry contact pins of a channel bypass signal input board card of the control system; two ends of the second signal interface pair (A2+ and A2-) are respectively used for being connected with two dry contact pins of a bypass allowable input plate of the control system; the first positive interface (B1+) is used for being connected with a first dry contact pin of a control system channel bypass signal output board card; the second positive interface (B2+) is used for being connected with a first dry contact pin of a bypass allowing signal output board card of the control system; and the negative interface (B-) is used for being connected with the second dry contact pin of the channel bypass signal output board card and the bypass allowing signal output board card respectively. In practice, the connection to the control system is schematically shown in fig. 2. Each interface of the bypass device is connected with corresponding pins of an input board card and an output board card of the control system through hard wiring. Specifically, the bypass allowing switch and the channel bypass switch are simultaneously closed, the bypass allowing signal and the channel bypass signal are simultaneously input into the digital quantity signal input board card (channel bypass signal input board card and bypass allowing signal input board card) of the control system through hardwiring, the trunk contacts corresponding to the channel bypass signal input board card and the bypass allowing signal input board card of the control system are connected, at this time, the logical value of the channel bypass signal received by the control system is 1, the logical value of the bypass allowing signal is also 1, the logical value of the channel bypass signal and the logical value of the bypass allowing signal are subjected to an and operation to obtain a logical value 1, the logical value is simultaneously sent to the trunk contacts corresponding to the channel bypass signal output board and the bypass allowing signal output board, the trunk contacts corresponding to the channel bypass signal output board and the bypass allowing signal output board are connected, and the corresponding channel bypass indicator light board card, the bypass indicator light board, The bypass allowing indicator lamp is closed, and the channel bypass indicator lamp and the bypass allowing indicator lamp are lightened.
The bypass allowing switch and the bypass switch are both two-position self-holding knobs, and when the two are operated simultaneously, the bypass control instruction can be triggered. Illustratively, as shown in fig. 3, the present solution takes redundant bypass devices as an example, each bypass device is connected to one control system, where one control system is one channel, and there are four channels in the present solution, which are channel i, channel ii, channel iii, and channel iv. In the scheme, when the channel I is taken as an example for channel bypass, the channel II, the channel III and the channel IV are other channels relative to the channel I. The bypass device also comprises other channel bypass indicator lamps, and in order to prevent two or more channels from being bypassed simultaneously, interlocking logic between the channel bypass is required to be set. When one protection channel is bypassed, the control system transmits the channel bypass signal to other protection channels through a network, each channel transmits the received other channel bypass signal to trunk points corresponding to other channel bypass signal output boards of the control system, the other channel bypass signal output boards are communicated with the corresponding trunk points, other channel bypass indicator lamps connected with the corresponding trunk points of the channel bypass signal output boards on a bypass device are lightened, and meanwhile, the issuing of the channel bypass signal is locked through logic operation, so that the channel bypass signal cannot be issued to downstream logic even if the channel bypass signal is triggered by mistake. Illustratively, when the channel I is bypassed, the logic value is 1, the channel II, the channel III and the channel IV are locked, the logic value is 0, the channel II, the channel III and the channel IV are subjected to OR operation to obtain a logic value 0, the logical value 0 is obtained by negation, and the logic value 1 is subjected to AND operation with the logic value of the channel I to obtain a logic value 1, so that the bypass of the channel I and the locking function of other channels are realized.
Through a reactor control system signal bypass device, solved current bypass device lack prevent the maloperation protection, do not fully consider the people because of bringing the lower problem of security that maloperation etc. caused, this scheme adopts the bypass to allow the function, opens the operation permission switch before the bypass operation, has avoided the false triggering that the artificial maloperation caused the signal, has promoted bypass device's security and reliability.
In another possible embodiment, the signal bypass device of the reactor control system further comprises N parameter bypass indicator lamps, N parameter bypass switches, N pairs of third signal interface pairs (A3+ and A3-) and N third positive interfaces (A3 +); wherein N is more than or equal to 1; two ends of the N parameter bypass switches are respectively and correspondingly connected with two ends of the N third signal interface pairs; the N parameter bypass indicator lamps are respectively connected in series between the positive polarity end of the power supply and the N third positive interfaces; two ends of the N third signal interface pairs are respectively used for being correspondingly connected with two dry contact pins of N parameter bypass signal input board cards of the control system; the N third positive interfaces are used for being connected with first dry contact pins of N parameter bypass signal output board cards of the control system respectively; the negative interface is also used for being connected with second dry contact points of the N parameter bypass signal output board cards.
Specifically, the bypass device can realize bypass of 28 groups of parameters at most, namely N is less than or equal to 28. When the bypass allowing switch and a certain parameter bypass switch are closed simultaneously, the bypass allowing signal and the parameter bypass signal are simultaneously input into a bypass allowing signal input board card and a parameter bypass signal input board card of the control system through hardwiring, the corresponding trunk contacts of the bypass allowing signal input board card and the channel bypass signal input board card of the control system are connected, at the moment, the logic values of the bypass allowing signal and the parameter bypass signal received by the control system are both 1, the logic value of the bypass allowing signal and the logic value of the parameter bypass signal are subjected to AND operation to obtain a logic value 1, the logic value is simultaneously sent to the corresponding trunk contacts of the bypass allowing signal output board card and the parameter bypass signal output board card, the corresponding trunk contacts of the bypass allowing signal output board card and the parameter bypass signal output board card are connected, and the corresponding bypass allowing indicator light and the parameter bypass indicator light in the bypass device are closed, the bypass enable indicator light and the parameter bypass indicator light are illuminated.
The parameters of the internal channels of the control system are actually obtained by the sensor acquisition field devices connected to the control system connected to the analog quantity signal input board of the control system. Depending on the requirements of the plant control system maintenance functions, it may also be desirable to bypass parameters of the internal channels of the control system when a sensor fails. Besides the connection of the bypass device and the control system, the sensor is also connected to an analog quantity signal input board card of the control system and used for collecting parameter signals of the field equipment. When a sensor fails, parameters of the control system need to be bypassed to ensure that the failed sensor does not affect the performance of the control system safety functions. Meanwhile, the parameter bypass signal is sent to other channels through the network to participate in logic and state display. As shown in fig. 4, when the sensor signal of the present channel fails, the parameter bypass indicator light of the present channel is turned on; or when the bypass allowing switch and a certain parameter bypass switch of the channel are closed simultaneously, the parameter bypass indicator lamp of the channel is lighted. When other channels are in parameter bypass, the control system transmits parameter bypass signals of other channels to the channel through a network, the channel transmits received logic values of other channel parameter bypass signals to corresponding trunk points of other channel parameter bypass signal output boards of the control system, the other channel parameter bypass signal output boards are communicated with the corresponding trunk points, and other channel parameter bypass indicator lamps connected with the corresponding trunk points of the other channel parameter bypass signal output boards on the bypass device are turned on. Specifically, if at least one parameter of the other channels is bypassed, the bypass states of the parameters of the other channels are logically or-operated to obtain a logical value 1, the logical value is sent to the trunk point corresponding to the other channel parameter bypass signal output board card, the other channel parameter bypass signal output board card is connected to the corresponding trunk point, and the other channel parameter bypass indicator light on the bypass device is turned on.
Through N parameter bypass switches and parameter bypass indicator lamps, the problem that the number of configurable parameters of the conventional bypass device is small is solved, the problem that more parameters need to be bypassed is avoided, and the reliability of the bypass device is improved.
In order to improve the safety of power supply of the power supply, the power supply preferably further comprises a diode, and after the positive polarity end of the power supply is connected in series with the diode, the power supply is respectively connected with the channel bypass indicator lamp, the bypass allowing indicator lamp and the parameter bypass indicator lamp; and one end close to the positive polarity end of the power supply is a diode anode, and one end close to the indicator light is a diode cathode. Preferably, the power supply adopts a redundant 24V direct current power supply.
Specifically, the redundant power supplies in this scheme are 24V + _ a, 24VAGND, 24V + _ B and 24VBGND in fig. 1, wherein two positive polarity terminals 24V + _ a and 24V + _ B of the power supplies are respectively connected to the anode of one diode, and the cathodes of the two diodes are connected; the two power negative polarity ends 24VAGND and 24VBGND are connected, and the redundant 24V direct-current power supply is adopted, so that the problem that the bypass device cannot be used due to damage of a single power supply is solved, and the reliability of the device is improved. Meanwhile, the diode connected to the positive polarity end of the power supply has the characteristic of one-way conduction, and the safety of the circuit is improved.
Preferably, the system also comprises a light test switch and a fourth signal interface pair (A4+ and A4-); two ends of the light test switch are respectively connected with two ends of the fourth signal interface pair; and the two ends of the fourth signal interface pair are connected with two dry contact pins of a lamp test signal input board card of the control system.
With the long-time operation of the nuclear power station, various devices have the phenomenon of continuous aging. The lamp test function can effectively check the faults of all the indicator lamps on the basis of not triggering the function of the test itself. When the light test switch is closed, the bypass device inputs a light test signal to the light test signal input board card, the logical value of the light test signal received by the control system is 1, and the logical value of the light test signal is respectively sent to the bypass allowing signal output board card, the channel bypass signal output board card and the N parameter bypass signal output board cards, the trunk joints of the corresponding bypass allowing signal output board card, the channel bypass signal output board card and the N parameter bypass signal output board cards are connected, the loops where the corresponding bypass allowing indicator lamp, the channel bypass indicator lamp and the N parameter bypass indicator lamps are located are closed, and the bypass allowing indicator lamp, the channel bypass indicator lamp and the N parameter bypass indicator lamps on the bypass device are all turned on. If an indicator lamp in the bypass device is not on after the light test switch is closed, the indicator lamp can be replaced by the spare part in advance. Potential faults can be identified in advance by designing a light test function, and misoperation of personnel caused by misjudgment of a bypass state due to equipment faults is avoided. Meanwhile, the bypass device is periodically subjected to light test, so that the bypass state indication is ensured to be normal, and the reliability of the bypass device is improved.
Preferably, the bypass device further comprises a housing, and a bypass allowing knob, a channel bypass knob and N parameter bypass knobs are arranged on the front face of the housing; the pin of the bypass allowing knob is welded with the movable terminal of the bypass allowing switch; the pin of the channel bypass knob is welded with the movable terminal of the channel bypass switch; and pins of the N parameter bypass knobs are respectively welded with movable terminals of the N parameter bypass switches correspondingly. Preferably, the housing further comprises a light test button, and a pin of the light test button is welded with the movable terminal of the light test switch. Preferably, the housing is a 4U cabinet structure.
Specifically, as shown in fig. 5, the device adopts a 4U chassis-type standardized structure, has a single model, and is provided with an operation panel on the front side for interfacing with a user, wherein the operation panel is provided with a bypass allowing knob, a channel bypass knob, a light trial button and 28 parameter bypass knobs, and the bypass allowing knob, the channel bypass knob and the parameter bypass knob are all accompanied with corresponding bypass indicator lights.
Preferably, the back of the shell is provided with two redundant pairs of power interfaces; each pair of the power interfaces comprises a positive polarity interface and a negative polarity interface; the positive interface is welded with the positive end of the power supply, and the negative interface is welded with the negative end of the power supply. Preferably, a redundant signal interface is further arranged on the back of the shell; and the signal interfaces are respectively welded with the first signal interface pair to the fourth signal interface pair.
Specifically, as shown in fig. 6, the power interface employs a fence terminal, and the fence terminal is connected to the internal power connection terminal through a screw according to a predetermined torque. The firm area of contact that just can effectual assurance connection of this connected mode is difficult not hard up in use and transportation, maintains the power supply and stabilizes, has guaranteed bypass device's reliability. The device is provided with three signal interfaces (CON 1-CON 3), each signal interface adopts an aviation connector, the aviation connectors are firm in connection, the signal connection parts are better sealed, the number of connectable signals is large, the space is saved, and the signal integration level of the bypass device is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.
Claims (10)
1. A signal bypass device of a reactor control system is characterized by comprising a power supply, a channel bypass indicator light, a bypass allowing indicator light, a channel bypass switch, a bypass allowing switch, a first signal interface pair, a second signal interface pair, a first positive interface, a second positive interface and a negative interface;
two ends of the channel bypass switch are respectively connected with two ends of the first signal interface pair, and two ends of the bypass allowing switch are respectively connected with two ends of the second signal interface pair;
the channel bypass indicator lamp is connected between the positive polarity end of the power supply and the first positive interface in series; the bypass allowing indicator lamp is connected between the positive polarity end of the power supply and the second positive interface in series;
two ends of the first signal interface pair are respectively used for being connected with two dry contact pins of a channel bypass signal input board card of the control system;
two ends of the second signal interface pair are respectively used for being connected with two dry contact pins of a bypass allowable input plate of the control system;
the first positive interface is used for being connected with a first dry contact pin of a bypass signal output board card of a channel of the control system; the second positive interface is used for being connected with a first dry contact pin of a bypass allowing signal output board card of the control system; and the negative interface is used for being connected with the second dry contact pins of the channel bypass signal output board card and the bypass allowing signal output board card respectively.
2. The bypass device according to claim 1, further comprising N parameter bypass indicator lights, N parameter bypass switches, N pairs of third signal interface pairs, and N third positive interfaces; wherein N is more than or equal to 1;
two ends of the N parameter bypass switches are respectively and correspondingly connected with two ends of the N third signal interface pairs;
the N parameter bypass indicator lamps are respectively connected in series between the positive polarity end of the power supply and the N third positive interfaces;
two ends of the N third signal interface pairs are respectively used for being correspondingly connected with two dry contact pins of N parameter bypass signal input board cards of the control system;
the N third positive interfaces are used for being connected with first dry contact pins of N parameter bypass signal output board cards of the control system respectively; the negative interface is also used for being connected with second dry contact points of the N parameter bypass signal output board cards.
3. The bypass device according to claim 2, further comprising a diode, wherein the positive polarity end of the power supply is connected in series with the diode and is connected with the channel bypass indicator light, the bypass allowing indicator light and the parameter bypass indicator light respectively; and one end close to the positive polarity end of the power supply is a diode anode, and one end close to the indicator light is a diode cathode.
4. The bypass device of claim 3, further comprising a light test switch and a fourth signal interface pair;
two ends of the light test switch are respectively connected with two ends of the fourth signal interface pair;
and the two ends of the fourth signal interface pair are connected with two dry contact pins of a lamp test signal input board card of the control system.
5. The bypass device according to claim 1, wherein the power supply is a redundant 24V dc power supply.
6. The bypass device according to claim 4, further comprising a housing having a front face provided with a bypass allowing knob, a channel bypass knob, and N parameter bypass knobs;
the pin of the bypass allowing knob is welded with the movable terminal of the bypass allowing switch;
the pin of the channel bypass knob is welded with the movable terminal of the channel bypass switch;
and pins of the N parameter bypass knobs are respectively welded with movable terminals of the N parameter bypass switches correspondingly.
7. The bypass device of claim 6, wherein the housing further comprises a light test button, a pin of the light test button being welded to the movable terminal of the light test switch.
8. The bypass device according to claim 6, wherein the back of the housing is provided with two pairs of redundant power supply interfaces;
each pair of the power interfaces comprises a positive polarity interface and a negative polarity interface;
the positive interface is welded with the positive end of the power supply, and the negative interface is welded with the negative end of the power supply.
9. The bypass device according to claim 6, wherein the back of the housing is further provided with redundant signal interfaces;
and the signal interfaces are respectively welded with the first signal interface pair to the fourth signal interface pair.
10. A bypass arrangement according to any of claims 6-9, wherein the housing is of 4U cabinet construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020350520.6U CN211719268U (en) | 2020-03-19 | 2020-03-19 | Signal bypass device of reactor control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020350520.6U CN211719268U (en) | 2020-03-19 | 2020-03-19 | Signal bypass device of reactor control system |
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| CN211719268U true CN211719268U (en) | 2020-10-20 |
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