CN110797875B - Boats and ships bank electricity case with external power supply function - Google Patents
Boats and ships bank electricity case with external power supply function Download PDFInfo
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- CN110797875B CN110797875B CN201911107679.3A CN201911107679A CN110797875B CN 110797875 B CN110797875 B CN 110797875B CN 201911107679 A CN201911107679 A CN 201911107679A CN 110797875 B CN110797875 B CN 110797875B
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- contactor
- fuse
- normally open
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- intermediate relay
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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
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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
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/40—Synchronising a generator for connection to a network or to another generator
- H02J3/44—Synchronising a generator for connection to a network or to another generator with means for ensuring correct phase sequence
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Keying Circuit Devices (AREA)
Abstract
The invention discloses a ship shore power box with an external power supply function, which comprises a box body, wherein an external three-phase electric interface, a distribution board interface, a circuit breaker, a first fuse, a second fuse, a first contactor, a second contactor and a universal change-over switch are arranged in the box body; the external three-phase electrical interface is connected with the circuit breaker; the circuit breaker is connected with the first contactor, and the first contactor is connected with the distribution board interface; the external three-phase electric interface is also connected with the first fuse; the first fuse is connected with the universal change-over switch; the distribution board interface is also connected with a second contactor, and the second contactor is connected with a circuit breaker; the panel interface is still connected with the second fuse, and the second fuse is connected in omnipotent change over switch. The shore power box disclosed by the invention realizes a bidirectional power supply function, can receive shore power and can also supply power to other ships through the shore power box by using a self generator.
Description
Technical Field
The invention relates to the technical field of ships, in particular to a ship shore power box with an external power supply function.
Background
The ship shore power box is a special ship power supply guarantee device installed on a port and a wharf. The device is suitable for a three-phase alternating-current power distribution system with the working frequency of 50-60 Hz and the rated working voltage of 220V/380V, provides a quick and safe standard shore power interface for a port-berthing ship, and realizes the cable-branching power supply, data acquisition, charging and settlement of the ship.
In the prior art, the ship shore power box only has the function of receiving power supplied from a shore base, and if external power supply is needed, an external power supply box needs to be additionally configured.
The prior art has the following defects: 1. the function of bidirectional power supply cannot be realized. 2. If need realize external power supply function, need increase an external power box, increase the quantity of laying of cable and circuit breaker, increased manufacturing cost. 3. The requirements for installation space are higher.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects in the prior art and provide a ship shore power box with an external power supply function.
The invention solves the technical problems through the following technical scheme:
a ship shore power box with an external power supply function comprises a box body, wherein an external three-phase electric interface, a distribution board interface, a circuit breaker, a first fuse, a second fuse, a first contactor, a second contactor and a universal change-over switch are arranged in the box body; the external three-phase electrical interface is connected with the circuit breaker; the circuit breaker is connected with the first contactor, and the first contactor is connected with the distribution board interface; the external three-phase electric interface is also connected with the first fuse; the first fuse is connected with the universal change-over switch; the distribution board interface is also connected with a second contactor, and the second contactor is connected with a circuit breaker; the panel interface is still connected with the second fuse, and the second fuse is connected in omnipotent change over switch.
Preferably, the ship shore power box further comprises a phase sequence relay and a first intermediate relay, wherein the phase sequence relay is connected with three terminals of the universal change-over switch; the first intermediate relay is connected with two terminals of the universal change-over switch.
Preferably, the ship shore power box further comprises a second intermediate relay, a third fuse, a fourth fuse and a transformer, two terminals of the universal change-over switch are connected with the third fuse, and the third fuse is connected with the primary side of the transformer; the fourth fuse is connected to the secondary side of the transformer.
Preferably, one end of a normally open contact of the first intermediate relay is connected with one end of the fourth fuse, the other end of the normally open contact of the first intermediate relay is connected with one end of the normally open contact of the phase sequence relay, and the other end of the fourth fuse is connected with one end of a coil of the second intermediate relay; and the other end of the normally open contact of the phase sequence relay is connected with the other end of the second intermediate relay coil.
Preferably, the ship shore power box further comprises a first change-over switch and a second change-over switch; the other end of the normally open contact of the first intermediate relay is also connected with one end of a manual contact and an automatic contact of the first change-over switch; the other end of the manual contact of the first change-over switch is connected with one end of the second change-over switch; the other end of the automatic contact of the first transfer switch is connected with one end of a No. 2 normally open contact and a No. 2 normally closed contact of the second intermediate relay; the positive sequence contact of the second transfer switch is connected with the other end of the No. 2 normally open contact of the second intermediate relay; the positive sequence contact of the second transfer switch is connected with one end of the normally closed contact of the second contactor; the negative sequence contact of the second transfer switch is connected with the other end of the No. 2 normally closed contact of the second intermediate relay, and the negative sequence contact of the second transfer switch is connected with one end of the normally closed contact of the first contactor; the other end of the fourth fuse is also connected with one end of a coil of the first contactor; the other end of the fourth fuse is also connected with one end of a coil of the second contactor; the other end of the normally closed contact of the second contactor is connected with the other end of the coil of the first contactor; the other end of the normally closed contact of the first contactor is connected with the other end of the coil of the second contactor.
Preferably, the ship shore power box further comprises a first indicator lamp, the other end of the normally open contact of the first intermediate relay is connected with one end of the No. 1 normally open contact of the second intermediate relay, and the other end of the fourth fuse is connected with one end of the first indicator lamp; the other end of the No. 1 normally open contact of the second intermediate relay is connected with the other end of the first indicator light.
Preferably, the ship shore power box further comprises a second indicator light, the other end of the normally open contact of the first intermediate relay is connected with one end of a No. 1 normally closed contact of the second intermediate relay, and the other end of the fourth fuse is connected with one end of the second indicator light; the other end of the No. 1 normally closed contact of the second intermediate relay is connected with the other end of the second indicator light.
Preferably, the ship shore power box further comprises a third indicator light, a fourth indicator light, a fifth indicator light and a sixth indicator light; the other end of the normally open contact of the first intermediate relay is also connected with two terminals of the universal change-over switch.
Preferably, the other end of the fourth fuse is further connected to one end of the third indicator light and one end of the fourth indicator light respectively; the terminal of the universal change-over switch is connected with the other end of the third indicator light; the terminal of the universal change-over switch is respectively connected with one end of a No. 1 normally open contact of the first contactor and one end of a No. 1 normally open contact of the second contactor; the other end of No. 1 normally open contact of first contactor links to each other with the other end of fourth pilot lamp, and the other end of No. 1 normally open contact of second contactor links to each other with the other end of fourth pilot lamp.
Preferably, the other end of the fourth fuse is further connected to one end of a fifth indicator light and one end of a sixth indicator light respectively; the terminal of the universal change-over switch is connected with the other end of the fifth indicator light; the terminal of the universal change-over switch is respectively connected with one end of a No. 2 normally open contact of the first contactor and one end of a No. 2 normally open contact of the second contactor; the other end of No. 2 normally open contact of first contactor, the other end of No. 2 normally open contact of second contactor all link to each other with the other end of sixth pilot lamp.
The invention has the beneficial effects that: the shore power box disclosed by the invention realizes a bidirectional power supply function, can receive shore power and can also supply power to other ships through the shore power box by using a self generator.
Drawings
FIG. 1 is a circuit diagram of a preferred embodiment of the present invention.
FIG. 2 is a schematic diagram of a box according to a preferred embodiment of the present invention.
Fig. 3 is an enlarged view of a portion a of fig. 2.
Detailed Description
The present invention will be more clearly and completely described in the following description of preferred embodiments, taken in conjunction with the accompanying drawings.
As shown in fig. 1, 2 and 3, a shore power box for a ship with an external power supply function comprises a box body 100, wherein an external three-phase electrical interface, a distribution board interface, a breaker QF, a first fuse FU1, a second fuse FU2, a third fuse FU3, a fourth fuse FU4, a first contactor KM1, a second contactor KM2, a universal transfer switch LW1, a phase sequence relay PSM, a first intermediate relay KA1, a second intermediate relay KA2, a transformer TR, a first transfer switch SW1, a second transfer switch SW2, a first indicator light H1, a second indicator light H2, a third indicator light H3, a fourth indicator light H4, a fifth indicator light H5 and a sixth indicator light H6 are arranged in the box body.
The first contactor KM1 includes a coil and normally open and normally closed contacts; the second contactor KM2 includes a coil and normally open and normally closed contacts; the first intermediate relay KA1 comprises a coil and a normally open and normally closed contact; the second intermediate relay comprises a coil and a normally open and normally closed contact; the phase sequence relay PSM comprises a coil and a normally open contact.
R, S, T from the external power supply three-phase is connected with the circuit breaker QF through an external three-phase electrical interface; the external power three-phase R, S, T is connected to the first fuse FU1 via an external three-phase electrical interface; the three phases of the first fuse FU1 are connected with terminals 7, 9 and 11 of a universal change-over switch LW 1; the other end R, S, T of the breaker QF is connected to U, V, W three phases of the switchboard interface through a first contactor KM 1; the other end R, S, T of the breaker QF is connected to W, V, U three phases of the switchboard interface through a second contactor KM 2; u, V, W three phases of the switchboard interface are connected with the second fuse FU 2; the three phases of the second fuse FU2 are connected to terminals 1, 3, 5 of the universal changeover switch LW 1.
Terminals 2, 4 and 6 and terminals 8, 10 and 12 of the universal change-over switch LW1 are connected; 2 and 4 terminals of the universal change-over switch LW1 are connected with a first intermediate relay KA 1; terminals 2, 4 and 6 of the universal changeover switch LW1 are connected to a phase sequence relay PSM.
2 and 6 terminals of the universal change-over switch LW1 are connected with a fuse FU 3; fuse FU3 is connected to the primary side of transformer TR. Fuse FU4 is connected to the secondary side of transformer TR.
One end of a normally open contact of the first intermediate relay KA1 is connected to one end of the fourth fuse FU4, and the other end of the normally open contact of the first intermediate relay KA1 is connected to one end of a normally open contact of the phase sequence relay PSM.
The other end of the normally open contact of the first intermediate relay KA1 is connected with one end of the normally open contact No. 1 of the second intermediate relay KA2, and the other end of the normally open contact of the first intermediate relay KA1 is connected with one end of the normally closed contact No. 1 of the second intermediate relay KA 2.
The other end of the normally open contact of the first intermediate relay KA1 is connected with terminals 13 and 15 of the universal changeover switch LW 1. The other end of the normally open contact of the first intermediate relay KA1 is connected to one end of the manual and automatic contacts of the first changeover switch SW 1.
The other end of the fourth fuse FU4 is connected to one end of the coil of the second intermediate relay KA 2.
The other end of the fourth fuse FU4 is connected to one end of the first indicator light H1, one end of the second indicator light H2, one end of the third indicator light H3, one end of the fourth indicator light H4, one end of the fifth indicator light H5, and one end of the sixth indicator light H6, respectively.
The other end of the fourth fuse FU4 is connected to one end of the coil of the first contactor KM1 and one end of the second contactor KM2, respectively.
The other end of the phase sequence relay PSM normally open contact is connected with the other end of the second intermediate relay KA2 coil; the other end of the No. 1 normally open contact of the second intermediate relay KA2 is connected with the other end of the first indicator lamp H1.
The other end of the No. 1 normally closed contact of the intermediate relay KA2 is connected with the other end of the second indicator light H2.
The No. 14 terminal of the universal change-over switch LW1 is respectively connected with one end of the No. 1 normally open contact of the first contactor KM1 and one end of the No. 1 normally open contact of the second contactor KM 2.
The 14 terminal of the universal changeover switch LW1 is connected to the other end of the third indicator light H3.
The other end of the No. 1 normally open contact of the first contactor KM1 and the other end of the No. 1 normally open contact of the second contactor KM2 are respectively connected with the other end of an indicator lamp H4.
The No. 16 terminal of the universal change-over switch LW1 is respectively connected with one end of the No. 2 normally open contact of the first contactor KM1 and one end of the No. 2 normally open contact of the second contactor KM 2.
The No. 16 terminal of the universal changeover switch LW1 is connected to the other end of the fifth indicator light H5.
The other end of the No. 2 normally open contact of the first contactor KM1 is connected with the other end of an indicator lamp H6; the other end of the No. 2 normally open contact of the second contactor KM2 was connected to the other end of the indicator lamp H6.
The other end of the manual contact of the first changeover switch SW1 is connected to one end of the second changeover switch SW 2.
The other end of the automatic contact of the first changeover switch SW1 is connected with one end of the No. 2 normally open and normally closed contacts of the second intermediate relay KA 2.
The positive sequence contact of the second conversion switch SW2 is connected with the other end of the No. 2 normally open contact of the second intermediate relay KA 2.
The positive sequence contact of the second changeover switch SW2 is connected to one end of the normally closed contact of the second contactor KM 2.
The negative sequence contact of the second changeover switch SW2 is connected with the other end of the normally closed contact No. 2 of the second intermediate relay KA 2.
The negative sequence contact of the second changeover switch SW2 was connected to one end of the normally closed contact of the first contactor KM 1.
The other end of the normally closed contact of the second contactor KM2 is connected with the other end of the coil of the first contactor KM 1; the other end of the normally closed contact of the first contactor KM1 was connected to the other end of the coil of the second contactor KM 2.
The shore power box circuit diagram is shown in fig. 1. The contact positions of the universal transfer switch LW1 in the shore power mode and the power supply mode are shown in table 1.
TABLE 1 contact position table for universal diverter switch LW1
The circuit principle in the shore power mode and the power supply mode is explained below.
1. Shore power mode:
the universal change-over switch LW1 is turned to the 'shore power mode', and contacts 7-8, 9-10, 11-12, 13-14 and 17-18 of LW1 are respectively connected. When the shore power supply is connected, the breaker QF is closed, the transformer is controlled to be powered on, and the first indicator lamp H3 is turned on to indicate that the shore power is connected. If the phase sequence correct phase sequence relay PSM normally open contact acts, the second intermediate relay KA2 is powered on, the normally open and normally closed contact acts, the first indicator light H1 is turned on to indicate that the phase sequence is in a positive sequence, the universal change-over switch SW1 is turned to be automatic, the coil of the first contactor KM1 is powered on to act, the main contact and the auxiliary normally open and normally closed contacts of the first contactor KM1 act, and the fourth indicator light H4 is turned on to indicate shore power input. If the phase sequence relay PSM with an incorrect phase sequence does not act, the second intermediate relay KA2 is not powered, the second indicator lamp H2 is turned on to indicate that the phase sequence is in a negative sequence, the first change-over switch SW1 is turned to be in an automatic state, the coil of the second contactor KM2 is powered to act, the main contact and the auxiliary normally open and normally closed contacts of the second contactor KM2 act, the phase sequence automatically changes, and the fourth indicator lamp H4 is turned on to indicate shore power input. When the first change-over switch SW1 is turned to manual, if the phase sequence is positive, the second change-over switch SW2 is turned to positive sequence, the coil of the first contactor KM1 is powered to act, the main contact of the first contactor KM1 acts with the auxiliary normally open and normally closed contacts, and the fourth indicator light H4 is turned on to indicate shore power input. When the first change-over switch SW1 is turned to manual, if the phase sequence is negative, the second change-over switch SW2 is turned to negative sequence, the coil of the second contactor KM2 is powered on to act, the main contact of the second contactor KM2 acts with the auxiliary normally open and normally closed contacts, the phase sequence is manually changed, and the fourth indicator light H4 is turned on to indicate shore power input. The contacts 17 and 18 of the universal transfer switch LW1 are externally connected to the switchboard and provide a shore power mode signal, which indicates that the shore power box is in shore power mode and the switchboard is to be interlocked accordingly.
2. Power supply mode
When the universal change-over switch LW1 is turned to the power supply mode, contacts 1-2, 3-4, 5-6, 15-16 and 19-20 of the universal change-over switch LW1 are respectively connected. When the power supply is switched on, the breaker QF is closed, the transformer is controlled to be electrified, and the fifth indicator light H5 is turned on to indicate power supply switching-on. If the phase sequence correct phase sequence relay PSM normally open contact acts, the second intermediate relay KA2 is electrified, the normally open and normally closed contact acts, the first indicator light H1 is on to indicate that the phase sequence is in a positive sequence, the first conversion switch SW1 is rotated to be automatic, the coil of the first contactor KM1 is electrified to act, the main contact of the first contactor KM1 acts with the auxiliary normally open and normally closed contact, and the sixth indicator light H6 is on to indicate power supply output. If the phase sequence relay PSM with an incorrect phase sequence does not act, the second intermediate relay KA2 is not powered, the second indicator light H2 is turned on to indicate that the phase sequence is in a negative sequence, the first change-over switch SW1 is turned to be automatic, the coil of the second contactor KM2 is powered to act, the main contact and the auxiliary normally open and normally closed contacts of the second contactor KM2 act, the phase sequence is automatically changed, and the sixth indicator light H6 is turned on to indicate power supply output. When the first change-over switch SW1 is turned to manual, if the phase sequence is positive, the second change-over switch SW2 is turned to positive sequence, the coil of the first contactor KM1 is electrified to act, the main contact of the first contactor KM1 acts with the auxiliary normally open and normally closed contacts, and the sixth indicator light H6 is turned on to indicate power supply output. When the first change-over switch SW1 is turned to manual, if the phase sequence is negative, the second change-over switch SW2 is turned to negative sequence, the coil of the second contactor KM2 is powered on to act, the main contact of the second contactor KM2 acts with the auxiliary normally open and normally closed contacts, the phase sequence is manually changed, and the sixth indicator light H6 is turned on to indicate power supply output. The contacts 19, 20 of the universal transfer switch LW1 are externally connected to the switchboard providing a shore power mode signal indicating that the shore power box is in power mode and the switchboard is to cancel the corresponding interlock.
In this embodiment, the box body of the shore power box is shown in fig. 2, which is a wall-mounted shore power box, and the box body can be made into a floor type according to actual arrangement and installation, and the panel of the shore power box is provided with an indicator light and a selection switch for mode selection and state identification.
The shore power box panel indicator light and the selector switch are shown in fig. 3. The panel is provided with a shore power access indicator light, a shore power input indicator light, a power supply access indicator light, a power supply output indicator light, a three-phase positive sequence indicator light, a three-phase negative sequence indicator light, a phase sequence switching manual automatic selection switch, a positive sequence negative sequence change-over switch and a power supply mode selection switch. Their functions are:
1. power supply mode transfer switch: the switch is used for switching between the modes of the shore power box and the external power supply box. When the knob points to the shore power box, the shore power box is in a shore power box mode, and the box body has the function of the shore power box and can receive shore power for supplying power and convey the shore power to the distribution board of the ship. When the knob points to the power supply box, the power supply box is in an external power supply mode, and the power supply box can receive the power supply of the ship generator and supply power to other ships needing power supply.
When the knob points to 0, the box body is in an off state at the moment, and cannot receive shore power and supply power to the outside.
2. Phase sequence conversion manual automatic selection switch: the switch is used for selecting a phase sequence conversion mode, and when the knob points to be manual, the phase sequence conversion function is manual conversion. When the knob points to the automation, the bank power box can realize the automatic conversion of phase sequence.
3. Positive sequence negative sequence change-over switch: the switch is a phase sequence change-over switch, when the manual automatic selection switch points to manual operation, the switch is effective, when the knob points to positive sequence, the shore power box does not perform phase sequence change-over to the input power supply and directly outputs,
when the knob points to the negative sequence, the shore power box converts the input power phase sequence and outputs the converted power phase sequence. When the knob points to stop, the shore power box stops outputting power.
4. Three-phase positive sequence pilot lamp: when the phase sequence of the power supply is positive, the lamp is on.
5. Three-phase negative sequence pilot lamp: when the phase sequence of the power supply is negative, the lamp is on.
6. Shore power access indicator lamp: in shore power mode, the light is on when shore power is switched on and the shore power supply is active.
7. Shore power input indicator lamp: in the shore power mode, when the shore power phase sequence is correct, after the shore power box breaker is switched on, the lamp is turned on, and the shore power is sent to the distribution board of the ship.
8. Power supply access indicator light: in the power supply mode, the lamp is on when the power supply of the ship distribution board is connected and effective.
9. Power supply output indicator light: in the power supply mode, when the power supply phase sequence is correct, and the shore power box breaker is switched on, the lamp is turned on to indicate that the ship starts to supply power to the outside.
Compared with the prior art, the invention has the following advantages: the shore power box realizes the function of bidirectional power supply, can receive shore power and can also supply power to the outside. On the premise of realizing the same function, the equipment cost and the installation cost are reduced.
The shore power box disclosed by the invention realizes a bidirectional power supply function, can receive shore power and can also supply power to other ships through the shore power box by using a self generator.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (4)
1. A ship shore power box with an external power supply function comprises a box body and is characterized in that an external three-phase electric interface, a distribution board interface, a circuit breaker, a first fuse, a second fuse, a first contactor, a second contactor and a universal change-over switch are arranged in the box body; the external three-phase electrical interface is connected with the circuit breaker; the circuit breaker is connected with the first contactor, and the first contactor is connected with the distribution board interface; the external three-phase electric interface is also connected with the first fuse; the first fuse is connected with the universal change-over switch; the distribution board interface is also connected with a second contactor, and the second contactor is connected with a circuit breaker; the distribution board interface is also connected with a second fuse, and the second fuse is connected with the universal change-over switch; the ship shore power box also comprises a phase sequence relay and a first intermediate relay, wherein the phase sequence relay is connected with three terminals of the universal change-over switch; the first intermediate relay is connected with two terminals of the universal change-over switch; the ship shore power box also comprises a second intermediate relay, a third fuse, a fourth fuse and a transformer, wherein two terminals of the universal change-over switch are connected with the third fuse, and the third fuse is connected with the primary side of the transformer; the fourth fuse is connected with the secondary side of the transformer; one end of a normally open contact of the first intermediate relay is connected with one end of a fourth fuse, the other end of the normally open contact of the first intermediate relay is connected with one end of the normally open contact of the phase sequence relay, and the other end of the fourth fuse is connected with one end of a coil of the second intermediate relay; the other end of the normally open contact of the phase sequence relay is connected with the other end of the second intermediate relay coil; the ship shore power box also comprises a first change-over switch and a second change-over switch; the other end of the normally open contact of the first intermediate relay is also connected with one end of a manual contact and an automatic contact of the first change-over switch; the other end of the manual contact of the first change-over switch is connected with one end of the second change-over switch; the other end of the automatic contact of the first transfer switch is connected with one end of a No. 2 normally open contact and a No. 2 normally closed contact of the second intermediate relay; the positive sequence contact of the second transfer switch is connected with the other end of the No. 2 normally open contact of the second intermediate relay; the positive sequence contact of the second transfer switch is connected with one end of the normally closed contact of the second contactor; the negative sequence contact of the second transfer switch is connected with the other end of the No. 2 normally closed contact of the second intermediate relay, and the negative sequence contact of the second transfer switch is connected with one end of the normally closed contact of the first contactor; the other end of the fourth fuse is also connected with one end of a coil of the first contactor; the other end of the fourth fuse is also connected with one end of a coil of the second contactor; the other end of the normally closed contact of the second contactor is connected with the other end of the coil of the first contactor; the other end of the normally closed contact of the first contactor is connected with the other end of the coil of the second contactor; the ship shore power box further comprises a first indicator lamp, the other end of the normally open contact of the first intermediate relay is connected with one end of the No. 1 normally open contact of the second intermediate relay, and the other end of the fourth fuse is connected with one end of the first indicator lamp; the other end of the No. 1 normally open contact of the second intermediate relay is connected with the other end of the first indicator light; the ship shore power box also comprises a second indicator light, the other end of the normally open contact of the first intermediate relay is also connected with one end of a No. 1 normally closed contact of the second intermediate relay, and the other end of the fourth fuse is connected with one end of the second indicator light; the other end of the No. 1 normally closed contact of the second intermediate relay is connected with the other end of the second indicator light.
2. The ship shore power box with an external power supply function according to claim 1, further comprising a third indicator light, a fourth indicator light, a fifth indicator light and a sixth indicator light; the other end of the normally open contact of the first intermediate relay is also connected with two terminals of the universal change-over switch.
3. The marine shore power box with an external power supply function according to claim 2, wherein the other end of the fourth fuse is further connected to one end of the third indicator light and one end of the fourth indicator light, respectively; the terminal of the universal change-over switch is connected with the other end of the third indicator light; the terminal of the universal change-over switch is respectively connected with one end of a No. 1 normally open contact of the first contactor and one end of a No. 1 normally open contact of the second contactor; the other end of No. 1 normally open contact of first contactor links to each other with the other end of fourth pilot lamp, and the other end of No. 1 normally open contact of second contactor links to each other with the other end of fourth pilot lamp.
4. The marine shore power box with an external power supply function according to claim 3, wherein the other end of the fourth fuse is further connected to one end of a fifth indicator light and one end of a sixth indicator light, respectively; the terminal of the universal change-over switch is connected with the other end of the fifth indicator light; the terminal of the universal change-over switch is respectively connected with one end of a No. 2 normally open contact of the first contactor and one end of a No. 2 normally open contact of the second contactor; the other end of No. 2 normally open contact of first contactor, the other end of No. 2 normally open contact of second contactor all link to each other with the other end of sixth pilot lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911107679.3A CN110797875B (en) | 2019-11-13 | 2019-11-13 | Boats and ships bank electricity case with external power supply function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911107679.3A CN110797875B (en) | 2019-11-13 | 2019-11-13 | Boats and ships bank electricity case with external power supply function |
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| CN112260109B (en) * | 2020-10-28 | 2022-07-01 | 西安中车永电电气有限公司 | High-protection double-electric shore power box |
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