CN111355242B - Shipborne low-voltage multi-loop shore power box - Google Patents
Shipborne low-voltage multi-loop shore power box Download PDFInfo
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- CN111355242B CN111355242B CN202010265639.8A CN202010265639A CN111355242B CN 111355242 B CN111355242 B CN 111355242B CN 202010265639 A CN202010265639 A CN 202010265639A CN 111355242 B CN111355242 B CN 111355242B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/04—Circuit arrangements for AC mains or AC distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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Abstract
The invention discloses a shipborne low-voltage multi-loop shore power box, wherein main contacts N, L, L2 and L3 of N-loop sockets XS 1-XSn are respectively connected with an N line, an L1 phase line, an L2 phase line and an L3 phase line of a wire inlet end of a circuit breaker Q, and the wire outlet of the circuit breaker Q is connected to a shore power switch of a main switchboard of a ship; every time the auxiliary contact P1 of the socket is connected with an auxiliary contact P2 of the socket after the auxiliary contact is movably connected with the breaker Q, one end of the on-site stop button S of the shore power box is connected with the positive electrode of a working power supply, the other end of the on-site stop button S is connected with the auxiliary contact P3 of the 1 st socket XS1 of the shore power box after the emergency cut-off button SJ of the ship side, one end of the under-voltage tripping coil YU of the breaker Q is connected with the negative electrode of the working power supply, the other end of the under-voltage tripping coil YU of the breaker Q is connected with the auxiliary contact P4 of the n-th socket XSn of the shore power box, and the auxiliary contact P4 of the i-th socket XSi is connected with the auxiliary contact P3 of the i+1-th socket XSi+1. The invention receives shore power from each shore power supply facility of the port and meets the safety protection requirement.
Description
Technical Field
The invention relates to a shipborne low-voltage multi-loop shore power box, and belongs to the technical field of marine equipment.
Background
The shore power box is a power receiving facility for connecting a ship with an external power supply. At present, the standard of the shore power box product execution in China is CB737-85 shore power box, and the standard does not relate to the content that a socket can be installed on the shore power box to serve as an external power supply access port.
The following 2.1.4 regulations of the "ship shore power system" in chapter 1, 11, are issued by the maritime office of the people's republic of China, national sailing and sea vessel legal inspection technical rules, modified report of 2018 (implemented since 1 st of 2019): the ship electricity and the shore power are connected through a plug and a socket. The design of the plug and socket should ensure that no incorrect connection occurs and that no hot plug is possible, providing that "plug and socket should conform to a recognized standard" noted as "IEC60309-5-2017 or other equivalent standard".
IEC60309-5-2017 Standard Industrial plug, receptacle and coupler part 5: the dimensional compatibility and interchangeability requirements ",〈"Plugs,socket-outlets and couplers for industrial purposes-Part5:Oimensional compatibility and interchangeability requirements for plugs,socket-outlets,ship connectors and ship inlets for low-voltage shore connectionsystems(LVSC)"〉, for plugs, sockets, marine connectors and marine sockets for low voltage shore power connection systems are set forth in IEC/IEEE 80005-3-2016 standard port utility connection-part 3: the low-voltage shore power connection system generally requires "〈"Utilityconnections in port.Part 3:Low Voltage Shore Connection(LVSC)Systems.General requirements"〉 to define and arrange the plug-in connector contacts identically, namely 4 main electrode contacts (E, L1, L2, L3) and 4 auxiliary contacts (P1, P2, P3, P4), and the structure is shown in the accompanying figures 1 and 2 of the specification.
JTS155-2019 (code of construction technology for quay shore installation, implemented on 1 st month 6 in 2019) approved by Ministry of transportation in China 4.2.7.2 specifies that "one or more of the connectors of Table 4.2.7 may be used for low voltage power supply" in a shore installation, see Table 1.
Table 1 low voltage power connector specification table
Note that: table 1 is referred to from Table 4.2.7 on page 6 of JTS155-2019 Specification
JTS155-2019 Specification 4.2.3 specifies: when the power supply capacity is smaller than 630kVA, a low-voltage power supply mode can be adopted; when the power supply capacity is 630kVA-1600kVA, a high-voltage power supply mode is adopted; when the power supply capacity is more than 1600kVA, a high-voltage power supply mode is adopted. Taking the ship demand of 600kVA and rated voltage of 400V as an example, the rated current reaches 866A, and the rated current of the low-voltage shore power connector is far beyond the maximum value of the rated current specified in the table 1. Therefore, when the demand of the ship for low-voltage shore power capacity is large, the technical problems are faced.
IEC/IEEE80005-3-2016 standard Port Utility connection-part 3: clause 7.1 of low voltage shore power connection system universal requirement "〈"IEC/IEEE80005-3-2016 Utility connections in port.Part3:Low Voltage Shore Connection(LVSC)Systems.General requirements〉: "a) when the vessel is connected to the low voltage shore power system, the necessary number of shore power access sockets should be set according to its maximum power requirement; b) The shore side system should provide necessary number of shore power output sockets according to the maximum power required by the ship; c) The ship is connected with a necessary number of sockets (all shore power sockets of the ship are connected) according to the maximum power requirement, if the sockets are not connected, the safety circuit is disconnected; d) The length of each cable connected to the ship from the shore is the same, the cable is independently controlled and protected, and the number of the multi-loop feeder lines of the ship shore power system proposed by the 7.3.1 standard of the independent safety loop ."〈a)Ships have the necessary number of inlets according to their maximal power demand while connected to LVSC system;b)Shore systems have the necessary number of socket-outlets according to the maximal power that can be supplied;c)Ships are connected only to the necessary number of socket-outlets according to their maximum power demand all ship inlets shall be connected other idle socket-outlets shall be de-energized,with the safety loop open;d)Each connection cable from shore to ship shall be at the same length,is controlled and protected independently,and has an independent safety loop.〉IEC/IEEE80005-3:2016 is as follows: the number of connections varies according to the power transferred from shore to ship, as shown in the following table ："〈The number of connections varies according to the power transferred from shore to ship as follows:〉
TABLE 2 relationship between feeder return and power demand and voltage
Note that: table 2 screenshot is from Table 1 (Table 1-
Number of connections as a function of power demand and voltage)
Table 2 shows that the greater the power of shore power required by the vessel, the lower the voltage level, and the greater the number of returns of connectors required to connect shore power; according to the IEC/IEEE80005-3-2016 standard, a multi-circuit connector should be used to connect shore power, but must meet safety requirements. IEC80005-3:2016, 7.3.1, requirement: "when the breaker of the on-board powered device fails to trip, the safety backup should include opening the breaker of the on-board main switchboard to access shore power ."〈In case of failure of ship on-board circuit breaker opening,a safety backup shall consist in opening on-board receiving switchboard circuit breaker〉.
Disclosure of Invention
The invention aims to provide a shipborne low-voltage multi-loop shore power box which is connected with an international standard rail for a multi-circuit connector for a ship to access a power supply from a shore low-voltage shore power supply facility, and can meet various requirements of related specifications and standards on the safety protection of a ship shore power system in technical aspects, thereby ensuring the power demand of the ship on the shore power and the safe operation of the ship shore power system.
The aim of the invention is realized by the following technical scheme:
the shipborne low-voltage multi-loop shore power box comprises a main circuit breaker Q, a shore power box on-site stop button S, a shipside emergency cut-off button SJ, a shipside emergency cut-off interface XT, a current monitoring relay 1K and a shore power box socket XSi, wherein i=1 to n, and n is more than or equal to 2; each shore power box receptacle XSi implements IEC60309-5-2017 standard, and is provided with a midpoint ground contact N, a phase contact L1, a phase contact L2, a phase contact L3, an auxiliary contact P1, an auxiliary contact P2, an auxiliary contact P3, and an auxiliary contact P4; the main breaker Q accessory is provided with an undervoltage coil YU and n auxiliary contacts; the neutral point ground contact N, the phase contact L1, the phase contact L2 and the phase contact L3 of the N-loop sockets XS 1-XSn of the shipborne low-voltage multi-loop shore power box are respectively connected with the N line, the L1 phase line, the L2 phase line and the L3 phase line of the inlet end of the main circuit breaker Q, and the outlet end of the main circuit breaker Q is connected to a shipborne main switchboard shore power switch through a protection tripping device; the auxiliary contact P1 of each back socket is connected with one end of a movable auxiliary contact of the main breaker Q, the other end of the movable auxiliary contact is connected with the auxiliary contact P2 of the socket, one end of the on-site stop button S of the shore power box is connected with the positive electrode of a working power supply, the other end of the on-site stop button S of the shore power box is connected with the terminal 1 of the ship side emergency cut-off interface XT, the two ends of the ship side emergency cut-off button SJ are connected between the terminal 1 and the terminal 2 of the ship side emergency cut-off interface XT, the terminal 2 of the ship side emergency cut-off interface XT is connected with the auxiliary contact P3 of the 1 st back socket XS1 of the shore power box, one end of the under-voltage trip coil YU of the main breaker Q is connected with the negative electrode of the working power supply after passing through the coil of the current monitoring relay 1K, the other end of the under-voltage trip coil YU is connected with the auxiliary contact P4 of the n back socket XSn of the shore power box, the auxiliary contact P4 of the i+1 back socket XSi is connected with the auxiliary contact P3 of the i=1.
The object of the invention can be further achieved by the following technical measures:
The shipborne low-voltage multi-loop shore power box is characterized in that a self-locking manual emergency cut-off button and a movable contact in a normal state for protecting (such as a shore power receiving system, a cable management system, an equipotential protection device, a shipside emergency cut-off device and other various safety protections) arranged according to related standard requirements of a shipside shore power device are connected in series between a terminal 1 and a terminal 2 of a shipside emergency cut-off interface XT.
The shipborne low-voltage multi-loop shore power box further comprises a wiring board 1X, a fuse 1F, a fuse 2F, a fuse 3F, a current transformer 1T, a current transformer 2T and a current transformer 3T; terminal N of the wiring board 1X is connected with N line of the main circuit breaker Q inlet end of the shore power box, terminal A of the wiring board 1X is connected with L1 phase line of the main circuit breaker Q inlet end of the shore power box through a fuse 1F, terminal B of the wiring board 1X is connected with L2 phase line of the main circuit breaker Q inlet end of the shore power box through a fuse 2F, terminal C of the wiring board 1X is connected with L3 phase line of the main circuit breaker Q inlet end of the shore power box through a fuse 3F, a protection and measurement device voltage loop is connected with terminal A, B, C, N of the wiring board 1X, a current transformer 1T, a current transformer 2T and a current transformer 3T are respectively arranged on L1 phase line, L2 phase line and L3 phase line of the main circuit breaker Q inlet end, one end of the current transformer 1T is connected with terminal Ia of the wiring board 1X, the same name end of the current transformer 2T is connected with terminal Ib of the wiring board 1T, the same name end of the current transformer 3T is connected with terminal Ic of the wiring board 1X, the other ends of the current transformers 1T, 3T and 3T are connected with the terminal Io of the wiring board 1X, and the other ends of the wiring board is connected with the earth; the protection and measurement device current loops are connected in series to terminals Ia, ib, ic of the wiring board 1X, and the ground of each current loop is connected in parallel to terminal Io.
Compared with the prior art, the invention has the beneficial effects that:
The shipborne low-voltage multi-loop shore power box product with the multi-loop socket as the shore power access port is firstly adopted to meet the requirement of the ship for accessing high-capacity low-voltage shore power.
The interlocking control circuit of the shore power box can meet the safety requirement of IEC/IEEE80005.3-2016 standard on a shore power multi-loop feeder: (1) The control contacts P1 and P2 of the n-circuit socket are respectively connected with n movable auxiliary contacts of the main circuit breaker of the shore power box in series in sequence, n P1/P2 interfaces of the opening/closing state of the main circuit breaker of the shore power box are independently provided for interlocking control with each feeder line of a shore power system, the feeder lines of the n-circuit socket can be ensured to be independently controlled and have independent safety loops, compatibility is facilitated to be realized, and meanwhile, the plug can be prevented from being electrified to be inserted; (2) The control contact P3 of the 1 st back socket is connected with a control power supply from a shore power box, the control contact P4 of the last 1 st back socket is connected with an under-voltage tripping coil of a main circuit breaker of the shore power box in series, the control contact P4 of the former back socket is connected with the control contact of the latter back socket, the control contacts P4 and P3 of each back socket are sequentially connected in series, an n-back P3/P4 interface for controlling a switching signal of the main circuit breaker of the shore power box is independently provided and used for interlocking control with each feeder line of a shore power system, the n-back socket is ensured to be connected with the shore power at the same time, any feeder line fault can trip the main circuit breaker of the shore power box at the same time, and each feeder line plug trips the main circuit breaker of the shore power box in the live extraction process.
A ship side emergency cut-off interface is arranged in the shore power box, a movable cut-off contact or a movable contact in a normal state of each protection function (such as a shore power receiving system, a cable management system, an equipotential protection device, ship side emergency cut-off and the like) which is required to be arranged by the shore power box according to related standard requirements is connected between a ship side emergency cut-off interface terminal 1 and a terminal 2, so that each protection device of the shore power box is convenient to test and overhaul, and conditions are created for newly increasing the protection functions.
The invention has the backup protection function, the current monitoring relay acts as an open circuit principle, when any protection action of an emergency cut-off interface XT or an emergency cut-off button SJ is pressed, the current monitoring relay 1K is released in a current shortage way, the contacts 11/12, 11/14, 21/22 and 21/24 are reset, and a switch connected with shore power on a main switch board on a ship is cut off and an alarm loop on the ship is connected.
Drawings
FIG. 1 is a block diagram of a plug connector of the IEC60309-5-2017 standard;
FIG. 2 is a diagram of a plug contact arrangement of the IEC80005-3-2016 standard;
FIG. 3 is a circuit diagram of an embodiment of an on-board low voltage multi-loop shore power box circuit;
FIG. 4 is an outline elevation of the shipboard low voltage multi-circuit shore power box;
FIG. 5 is a side view of the shipboard low voltage multi-circuit shore power box profile;
fig. 6 is a bottom view of the exterior of the shipboard low voltage multi-circuit shore power chest.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
The auxiliary working power supply of the shipborne low-voltage multi-loop shore power box is specified according to IEC/IEEE80005.3-2016 standard: the voltage used in the auxiliary circuit should be less than 60V dc or 25V ac. "< The voltage used in the pilot circuit shall be less than 60V d.c.or 25V a.c. >
The main electrical devices of the shipborne low-voltage multi-loop shore power box are as follows: a main breaker Q (the main breaker Q is 4 poles, rated current is configured according to the sum of rated current of all sockets, thermomagnetic trip protection or electronic trip protection is performed, short-circuit breaking capacity is selected according to system short-circuit current, accessory drive auxiliary contact and under-voltage tripper coil are selected according to the number of sockets, auxiliary contact can be expanded by an intermediate relay, rated voltage of the under-voltage tripper coil is selected according to the voltage of a shore power box auxiliary working power supply, the main breaker can also be selected by electric operation type, and the operation power supply is selected according to the voltage of the shore power box auxiliary working power supply); an in-place stop button S; a ship side emergency cut-off interface XT; the shore power box connectors (sockets XS 1-N) are N sets (the number of N sets is set according to the requirement based on rated current), the connector model is according to IEC60309-5-2017 standard, the shore power box connector at least comprises a ground contact E (N or PE), a phase contact L1, a phase contact L2, a phase contact L3, an auxiliary contact P1, an auxiliary contact P2, an auxiliary contact P3 and an auxiliary contact P4, and the sequence of the connection of each contact and the socket when a plug of a shore power cable is inserted into the socket of the shore power box is as follows: (1) a ground contact, (2) a power contact, (3) a control contact; the sequence of disconnection of each contact and the socket when the plug is pulled out of the socket is as follows: (1) control contacts, (2) power contacts, (3) ground contacts; the current monitoring relay 1K (dc 3 mA-100 mA is adjustable, the open circuit principle acts, for example, the CM-SRS current monitoring relay ac or dc general 3 mA-1A of ABB products is adjustable, but a working power supply is needed, the working power supply can be selected according to the voltage of a shore power box auxiliary working power supply), other devices such as monitoring protection, metering indication and the like are configured according to requirements,
The control circuit of the shipborne low-voltage multi-loop shore power box is as follows: the auxiliary contact P1 of the n-circuit socket is sequentially connected with one end of n movable auxiliary contacts of the main breaker Q, and the auxiliary contact P2 of the n-circuit socket is sequentially connected with the other end of n movable auxiliary contacts of the main breaker Q; the positive pole of the working power supply of the shore power box is connected with one end of an on-site stop button S, the other end of the on-site stop button S of the shore power box is connected with a terminal 1 of an emergency cut-off interface XT of the shore power box, a terminal 2 of the emergency cut-off interface XT of the shore power box is connected with an auxiliary contact P3 of a1 st back socket XS1 of the shore power box, an auxiliary contact P4 of the 1 st back socket XS1 is connected with an auxiliary contact P3 of a 3 rd back socket XS3, the auxiliary contact P4 of the 3 rd back socket XS3 is connected with an auxiliary contact P3 of a 4 th back socket XS4, (the connection mode of the auxiliary contacts P3 and P4 of each back socket above 4 is the same as above), the auxiliary contact P4 of the last back socket is connected with one end of an undervoltage tripping coil YU of a main circuit breaker Q, the negative pole of the working power supply of the shore power box is connected with one end of a current monitoring relay 1K coil, the other end of the 1K coil is connected with the other end of the undervoltage tripping coil YU of the main circuit breaker Q, and the current monitoring relay K1 is connected with the alarm contact K1.
Terminal N of wiring board 1X is connected with N line of shore power box main breaker Q lead-in, terminal A of wiring board 1X is connected with L1 phase line of shore power box main breaker Q lead-in through fuse 1F, terminal B of wiring board 1X is connected with L2 phase line of shore power box main breaker Q lead-in through fuse 2F, terminal C of wiring board 1X is connected with L3 phase line of shore power box main breaker Q lead-in through fuse 3F, protection and measuring device voltage loop links to each other (parallel connection) with terminal A, B, C, N of wiring board 1X.
The current transformer 1T, the current transformer 2T and the current transformer 3T are respectively arranged on an L1 phase line, an L2 phase line and an L3 phase line of the outlet end of the main circuit breaker Q, one end of the current transformer 1T is connected with a terminal Ia of the wiring board 1X, the homonymous end of the current transformer 2T and the homonymous end of the current transformer 1T are connected with a terminal Ib of the wiring board 1X, the homonymous end of the current transformer 3T and the homonymous end of the current transformer 1T are connected with a terminal Ic of the wiring board 1X, the other ends of the current transformers 1T, 2T and 3T are connected with the ground in parallel, and a terminal Io of the wiring board 1X is grounded; the protection and measurement device current loops are connected in series to terminals Ia, ib, ic of the wiring board 1X, and the ground of each current loop is connected in parallel to terminal Io.
As shown in fig. 3, the shipborne low-voltage 2-loop shore power box circuit diagram is shown, and main electrical devices are as follows: an accessory belt undervoltage release coil YU (rated voltage is DC 24V) of a main breaker Q (4-pole, thermomagnetic release protection) and 2 movable auxiliary contacts Q1 and Q2; an in-place stop button S; a ship side emergency cut-off interface XT (access self-locking manual emergency cut-off button SJ as an example); the 2-pin sockets XS1 and XS2 of the shore power box are provided with a midpoint ground contact N, a phase line contact L1, a phase line contact L2, a phase line contact L3, an auxiliary contact P1, an auxiliary contact P2, an auxiliary contact P3 and an auxiliary contact P4 according to the IEC60309-5-2017 standard, and the sequence of the contacts being communicated with the socket when the plug is inserted into the socket is as follows: (1) a ground contact, (2) a power contact, (3) a control contact; the sequence of disconnection of each contact from the socket when the plug is pulled out of the socket is: (1) control contacts, (2) power contacts, (3) ground contacts.
In the main circuit of fig. 3, the midpoint ground contacts N (or E, PE), the phase line contacts L1, L2, and L3 of the sockets XS1 and XS2 are connected to the N terminal, L1 terminal, L2 terminal, and L3 terminal, respectively, of the inlet terminal of the main circuit breaker Q of the shore power hookup.
The safety control circuit in fig. 3 is:
The auxiliary contact P1 of the 1 st back socket XS1 is connected with one end of the moving auxiliary contact Q1 of the circuit breaker Q, and the auxiliary contact P2 of the 1 st back socket XS1 is connected with the other end of the moving auxiliary contact Q1; the auxiliary contact P1 of the 2 nd back socket XS2 is connected with one end of the moving auxiliary contact Q2 of the circuit breaker Q, and the auxiliary contact P2 of the 2 nd back socket XS2 is connected with the other end of the moving auxiliary contact Q2.
The auxiliary working power supply of the shore power box can be provided with a DC24V power supply by a ship charge-discharge plate, the positive electrode of the auxiliary working power supply is connected with one end of a local stop button S, the other end of the local stop button S is connected with a terminal 1 in a ship side emergency cut-off interface XT, a terminal 2 in the ship side emergency cut-off interface XT is connected with an auxiliary contact P3 of a1 st back socket XS1 of the shore power box, an auxiliary contact P4 of the 1 st back socket XS1 is connected with an auxiliary contact P3 of a 2 nd back socket XS2, the auxiliary contact P4 of the 2 nd back socket XS2 is connected with one end of an undervoltage trip coil YU of a circuit breaker Q (the 2 nd back socket XS2 is the last back socket of the embodiment), and the negative electrode of the working power supply of the shore power box is connected with the other end of the undervoltage trip coil YU.
The self-locking manual emergency cut-off button SJ is connected between the terminal 1 and the terminal 2 of the shipside emergency cut-off interface XT, and the movable contact or the movable contact in a normal state of various safety protections such as a shipside shore power receiving device, a shore power cable management system, an equipotential protection device, shipside emergency cut-off and the like can be connected between the terminal 1 and the terminal 2 of the shipside emergency cut-off interface XT in series, so that various safety protection functions of a shipside emergency cut-off interface XT, which are set according to related standard requirements, are realized, and the shipside emergency cut-off interface XT also creates conditions for newly increasing protection functions.
As shown in fig. 3, the on-board 2-loop low-voltage shore power box has the following working principle and functions:
(1) After the 1 st return interface P3/P4 and the 2 nd return interface P3/P4 are respectively connected by the external interlocking circuit, the main breaker Q of the shore power box has a closing condition, thereby explaining: ① After the plug at the end part of the two-circuit shore power cable is inserted, a main breaker Q of the shore power box has a closing condition; ② When the main circuit breaker Q of the shore power box is switched on, the main circuit breaker Q of the shore power box is automatically tripped in the process of pulling out any plug; ③ If the external interlocking circuit is disconnected, the main breaker Q of the shore power box is automatically tripped; ④ The two-circuit shore power cable (comprising an end connector) has short circuit or open circuit fault in any circuit, and the main breaker Q of the shore power box is automatically tripped.
(2) Before the main circuit breaker Q of the shore power box is switched on, passive switching values respectively provided by the 1 st return interface P1/P2 and the 2 nd return interface P1/P2 are in an open state, and after the main circuit breaker Q of the shore power box is switched on, the 1 st return interface P1/P2 and the 2 nd return interface P1/P2 are in a switch-on state, so that the 2 nd return interfaces can be used for respectively controlling shore side power supply facilities directly or through other electrical devices, and the following can be achieved: ① Before the main breaker Q of the shore power box is switched on, the shore power supply facility cannot supply power; ② When the main breaker Q of the shore power box is tripped, the shore power supply facility is automatically powered off.
(3) The main breaker Q of the shore power box is automatically tripped when any one of a shore power receiving device, a cable management system, an equipotential protection, a ship side emergency cut-off and other safety protection which are arranged between the ship side emergency cut-off interface XT terminal 1 and the terminal 2 according to the standard is connected, or a self-locking manual emergency cut-off button SJ is pressed.
(4) When the under-voltage tripping coil YU of the shore power box is powered on, the current monitoring relay 1K is attracted, the contacts 11/12 and 21/22 of the current monitoring relay are disconnected, and the contacts 11/14 and 21/24 of the current monitoring relay are connected; when any protection action of the emergency cut-off interface XT or the emergency cut-off button SJ is pressed, the current monitoring relay 1K is released in a undercurrent way, the contacts 11/12, 11/14, 21/22 and 21/24 are reset, a switch for accessing shore power on a main switch board on a ship is cut off, and an alarm loop on the ship is connected, so that the backup protection function is ensured when the main circuit breaker Q of the shore power box fails to trip.
(5) JTS155-2019 Specification, article 4.2.7.2, states: when the shore power system is not provided with a connector, M10 binding posts can be used for connection, at present, the construction or transformation progress of the shore power of each port and dock is different, the technical requirements are not completely unified, if a shore side power socket box for berthing the ship to the port and dock is not provided with a corresponding safety control interface, or the port shore power is not provided with a socket, as long as P3/P4 interfaces on a shipborne multi-socket low-voltage shore power box are short-circuited by 1mm 2 copper wires, the shore power can be accessed by studs, the shore power can be accessed under any condition of meeting shore power facilities, and the temporary emergency measure can lose part of the safety protection function.
(6) If a safety protection electric appliance and a measurement and control device are needed to be added in the shipborne multi-socket low-voltage shore power box, voltage and current signals can be received from the wiring board 1X, and a protection or interlocking contact can be connected between the emergency cut-off interface XT terminal 1 and the terminal 2 in series, so that the safety control interlocking circuit has no influence on the safety control interlocking circuit, and the safety control interlocking circuit does not influence the addition of a necessary safety protection circuit and a measurement and control circuit in the shipborne multi-socket low-voltage shore power box.
From the working principle and the functions of the embodiment shown in fig. 3, the shipborne multi-socket low-voltage shore power box product can completely meet various requirements of various related standard standards on a shipborne shore power system, and can achieve the following functions:
① After the feedback electric lines are completely connected in an inserting way, a main breaker of the ship side shore power box can be switched on, so that the phenomenon of plug missing in the multi-circuit socket feed shore power box can be prevented;
② When any feedback line cable has short circuit or open circuit fault, the main breaker of the ship side shore power box is automatically tripped;
③ In the process of pulling any plug back on any side by live fault, the main breaker of the ship side shore power box is automatically tripped;
④ When any one of the safety protection actions of the on-site cut-off breaker or the ship side emergency cut-off interface is manually pressed, the main breaker of the ship side shore power box is automatically tripped;
⑤ The main breaker tripping signal of the ship side shore power box can be provided for a shore side power supply facility through an interlocking interface, so that the linkage of the two sides of the ship shore is realized;
⑥ The main circuit breaker of the shore power box has a backup protection function, and can cut off a switch connected with shore power on a main switch board of a ship when the tripping failure of the main circuit breaker of the shore power box occurs;
⑦ The shipborne low-voltage multi-loop shore power box can be compatible with shore power supply facilities of which the ports and wharfs meet international and domestic related standards; when the port shore power facilities do not meet the international and domestic standard interfaces, a temporary emergency method is provided for shorting the P3/P4 interfaces on the shore power box by using 1mm 2 copper wires, and a stud can be used for connecting a shore power supply;
⑧ The movable disconnection auxiliary contact Q11 of the main circuit breaker of the shore power box can be interlocked with a ship power supply;
⑨ The shipborne low-voltage multi-loop shore power box and the three-phase three-wire insulation system and the three-phase four-ground system of the shipborne power system can be compatible. When the three-phase five-wire socket is adopted, the PE contact of the socket can be connected with a ship body (ship ground PE), and the shipborne multi-socket low-voltage shore power box is applicable as usual.
The structure, the appearance and the technical requirements of the shipborne low-voltage multi-loop shore power box are as follows:
1. the shore power box body is made of common steel plates or stainless steel plates with thickness not less than 1.5mm, the protection grade of the shell is IP56, and the structure and the manufacturing process are required according to industry standards;
2. An electric appliance insulating board is arranged in the box, and the insulating board is made of heat-resistant, moisture-resistant and flame-retardant insulating boards with enough mechanical strength and chemical stability;
3. the stuffing box is made of common carbon steel or brass, and the waterproof door hinge lap is made of common carbon steel nickel plating or stainless steel;
4. protection ground: the shore power box body is provided with a protective grounding stud (PE), the stud specification is not less than M10, the surfaces of the left upper box leg and the right lower box leg of the box body are smooth and clean, copper plating layers or tin plating layers are arranged, and the box door is grounded by a wire;
5. The outline and the socket mounting positions of the shipborne low-voltage multi-loop shore power box are shown in figures 4, 5 and 6 of the specification, wherein in the figures, a box foot is shown as a legend 1, a box door hasp is shown as a box door 3, a waterproof hinge is shown as a box door handle is shown as a box door 4, a wire inlet stuffing box is shown as a box door 5, a wire outlet stuffing box is shown as a box body 6, a working power supply and control wire stuffing box is shown as a box 7, a standard socket is shown as a box 8, and a grounding stud is shown as a box 9;
6. the overall reference dimension and stuffing box configuration of the shipborne low-voltage multi-loop shore power box are shown in Table 3;
table 3 shipborne low-voltage multi-loop shore power box external dimension and stuffing box configuration reference table
Note that: 1. the external dimensions in table 3 do not include the box foot dimensions, which can be adjusted appropriately when the electrical appliance configurations are different; 2. the stuffing box can also be TJ type, and the inlet stuffing box is used for standby.
7. The moisture resistance, mildew resistance, salt spray resistance and vibration resistance of the shore power box are tested in relation to each other, and the requirements and the relevant regulations of CCS ship building regulations are met;
8. the shore power box has transportation resistance, and after a product is subjected to a transportation test, the shore power box can work normally without damage, mechanical looseness and the like.
In addition to the above embodiments, other embodiments of the present invention are possible, and all technical solutions formed by equivalent substitution or equivalent transformation are within the scope of the present invention.
Claims (1)
1. The shipborne low-voltage multi-loop shore power box is characterized by comprising a main circuit breaker Q, a shore power box on-site stop button S, a shipside emergency cut-off button SJ, a shipside emergency cut-off interface XT, a current monitoring relay 1K and a shore power box socket XSi, wherein i=1-n, and n is more than or equal to 2; each shore power box receptacle XSi implements IEC60309-5-2017 standard, and is provided with a midpoint ground contact N, a phase contact L1, a phase contact L2, a phase contact L3, an auxiliary contact P1, an auxiliary contact P2, an auxiliary contact P3, and an auxiliary contact P4; the main breaker Q accessory is provided with an undervoltage coil YU and n auxiliary contacts; the neutral point ground contact N, the phase contact L1, the phase contact L2 and the phase contact L3 of the N-loop sockets XS 1-XSn of the shipborne low-voltage multi-loop shore power box are respectively connected with the N line, the L1 phase line, the L2 phase line and the L3 phase line of the inlet end of the main circuit breaker Q, and the outlet end of the main circuit breaker Q is connected to a shipborne main switchboard shore power switch through a protection tripping device; the auxiliary contact P1 of each back socket is connected with one end of a movable auxiliary contact of the main breaker Q, the other end of the movable auxiliary contact is connected with the auxiliary contact P2 of the socket, one end of a local stop button S of the shore power box is connected with the positive electrode of a working power supply, the other end of the local stop button S of the shore power box is connected with a terminal 1 of a ship side emergency cut-off interface XT, two ends of the ship side emergency cut-off button SJ are connected between the terminal 1 and the terminal 2 of the ship side emergency cut-off interface XT, the terminal 2 of the ship side emergency cut-off interface XT is connected with the auxiliary contact P3 of the 1 st back socket XS1 of the shore power box, one end of an undervoltage tripping coil YU of the main breaker Q is connected with the negative electrode of the working power supply after passing through a coil of a current monitoring relay 1K, the other end of the undervoltage tripping coil YU is connected with the auxiliary contact P4 of an n back socket XSn of the shore power box, the auxiliary contact P4 of an i+1 back socket XSi is connected with the auxiliary contact P3 of the i+1, and i=1-n 1;
A self-locking manual emergency cut-off button and a protective movable contact or a movable contact in a normal state, which are arranged according to related standard requirements, of a shipside shore power device are connected in series between a terminal 1 and a terminal 2 of the shipside emergency cut-off interface XT;
The device also comprises a wiring board 1X, a fuse 1F, a fuse 2F, a fuse 3F, a current transformer 1T, a current transformer 2T and a current transformer 3T; terminal N of the wiring board 1X is connected with N line of the main circuit breaker Q inlet end of the shore power box, terminal A of the wiring board 1X is connected with L1 phase line of the main circuit breaker Q inlet end of the shore power box through a fuse 1F, terminal B of the wiring board 1X is connected with L2 phase line of the main circuit breaker Q inlet end of the shore power box through a fuse 2F, terminal C of the wiring board 1X is connected with L3 phase line of the main circuit breaker Q inlet end of the shore power box through a fuse 3F, a protection and measurement device voltage loop is connected with terminal A, B, C, N of the wiring board 1X, a current transformer 1T, a current transformer 2T and a current transformer 3T are respectively arranged on L1 phase line, L2 phase line and L3 phase line of the main circuit breaker Q inlet end, one end of the current transformer 1T is connected with terminal Ia of the wiring board 1X, the same name end of the current transformer 2T is connected with terminal Ib of the wiring board 1T, the same name end of the current transformer 3T is connected with terminal Ic of the wiring board 1X, the other ends of the current transformers 1T, 3T and 3T are connected with the terminal Io of the wiring board 1X, and the other ends of the wiring board is connected with the earth; the protection and measurement device current loops are connected in series to terminals Ia, ib, ic of the wiring board 1X, and the ground of each current loop is connected in parallel to terminal Io.
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| US7408273B2 (en) * | 2004-10-12 | 2008-08-05 | Slocum Kim M | Shore power access system |
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