CN106655475B - Automatic switching and delay shutdown circuit of ship emergency generator set - Google Patents
Automatic switching and delay shutdown circuit of ship emergency generator set Download PDFInfo
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- CN106655475B CN106655475B CN201611048729.1A CN201611048729A CN106655475B CN 106655475 B CN106655475 B CN 106655475B CN 201611048729 A CN201611048729 A CN 201611048729A CN 106655475 B CN106655475 B CN 106655475B
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
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Abstract
The invention discloses an automatic switching and time-delay shutdown circuit of a ship emergency generator set, which comprises an emergency generator EG, a host DG, a contact switch Q1, a host switch Q2, a shore power switch Q3, an isolating switch EQ1, an emergency generator main switch EQ2, a manual and automatic selection switch 1S, an emergency generator main switch closing button 2S, an emergency stop button 3S, a manual starting button 4S, an under-voltage relay 1U, an under-voltage relay 2U, an intermediate relay 1K, an intermediate relay 2K, an intermediate relay 3K, a time relay 4K, a closing motor 1M, a closing motor 2M, a fuse 1F, a fuse 2F, a fuse 3F, a fuse 4F and a diesel engine control device. The invention realizes the function that the emergency generator set runs for a few minutes in idle mode after the emergency power supply automatically transfers the emergency load to the power supply, and stops running after the temperature of the engine is reduced, thereby being beneficial to the cooling of the generator set.
Description
Technical Field
The invention relates to a ship emergency generator set, in particular to an automatic switching and delay shutdown circuit of the ship emergency generator set, and belongs to the technical field of ship electrical equipment.
Background
On a ship, when the main power supply for supplying power to the emergency distribution board fails, the emergency generator should be capable of being started automatically to supply power to the emergency distribution board, and during normal operation, the emergency distribution board is powered by the main distribution board through a feeder line. The feed on the main switchboard should have sufficient overload and short-time protection and the emergency switchboard automatically cuts off the feed in case of a main power failure. If the system is set to feed-back operation, the feeder should also be provided with at least short-circuit protection on the emergency switchboard. To ensure the effectiveness of the emergency power supply, facilities should be provided to enable the non-emergency lines to be automatically disconnected from the emergency power distribution panel when necessary to ensure that the emergency lines are powered.
The ship emergency power supply is a power supply for supplying power to an emergency power load under the condition that a main power supply fails. The SOLAS convention and the ship regulations issued by the large class companies prescribe that passenger ships and cargo ships above 500 total tons as well as various steel marine ships should be provided with an independent emergency power station, that in an emergency situation provides sufficient power for those safety-relevant important equipment, that it must be ensured that these equipment are operated simultaneously, and that each emergency equipment operating on power can be supplied simultaneously at least for a prescribed time, taking account of the starting current and transient characteristics of certain loads.
The ship emergency power station is generally composed of an emergency generator set, an emergency power distribution board, an emergency transformer and other devices, wherein the emergency power distribution board controls and protects an emergency generator and distributes power to loads necessary for guaranteeing ship safety directly or through the transformer. Under normal operating conditions, the emergency switchboard is powered by the main switchboard via an interconnection line feeder. The feeder should have sufficient overload protection and short-circuit protection on the main switchboard side and should be automatically disconnected at the emergency switchboard in case of failure of the main power supply.
Because most of the emergency power loads are powered by an alternating current power supply, the emergency power supplies of various ships are usually three-phase alternating current emergency generator sets, and the three-phase alternating current emergency generator sets are arranged at the places with relatively good safety above a main deck to supply power to an emergency distribution board. The emergency power generator is selected according to 150% of the calculated load of the emergency power, and the maximum motor in the power supply range is required to be started, so that no adverse effect is caused on other electric equipment. If there is only one emergency generator set, a group of storage batteries should be set as temporary emergency power supply, the storage batteries should have enough capacity, and once the main power supply or the emergency power supply fails, at least the emergency lamp at the important position can automatically supply power to special emergency electric equipment such as radio stations, in-ship communication, fire detection, alarm, whistles, daytime signal lamps and the like.
Under normal operating conditions, the emergency panel should be powered by the main panel via an interconnect line feeder. The feeder should have sufficient overload protection and short-circuit protection on the main switchboard side and should be automatically disconnected at the emergency switchboard in case of failure of the main power supply. In order to ensure that the emergency generator set can be independently used at any time, a contact switch for feeding with the emergency distribution board is arranged on the side of the main distribution board in design, and an isolating switch for disconnecting with the main distribution board is arranged on the side of the emergency distribution board, wherein the two switches are circuit breakers with short-circuit protection, overload protection, undervoltage protection and electric closing functions, and the emergency generator set automatically supplies power to the emergency distribution board when a main power supply loses power.
If the emergency generator set is stopped immediately after the emergency generator set runs for a long time under heavy load, the machine belt cooling device stops working at the same time, so that the temperature of the emergency generator set is not reduced but is increased in a short time after the emergency generator set stops working, and adverse effects are generated on the emergency generator set. Therefore, after the emergency power supply automatically transfers the emergency load to the power supply, the emergency generator set should run for a few minutes in idle mode, and stop running after the temperature of the generator is reduced, so that the temperature of the generator set is reduced.
Disclosure of Invention
The invention aims to provide an automatic switching and delay shutdown circuit of a ship emergency generator set, which realizes the function that the emergency generator set firstly runs for a few minutes in a no-load mode after an emergency power supply automatically transfers an emergency load to be supplied by the power supply and then stops running after the temperature of an engine is reduced, so that the set is cooled.
The aim of the invention is realized by the following technical scheme:
an automatic switching and delay shutdown circuit of a ship emergency generator set comprises an emergency generator EG, a host DG, a contact switch Q1, a host switch Q2, a shore power switch Q3, an isolating switch EQ1, an emergency generator main switch EQ2, a manual automatic selection switch 1S, an emergency generator main switch closing button 2S, an emergency stop button 3S, a manual starting button 4S, an under-voltage relay 1U, an under-voltage relay 2U, an intermediate relay 1K, an intermediate relay 2K, an intermediate relay 3K, a time relay 4K, a closing motor 1M, a closing motor 2M, a fuse 1F, a fuse 2F, a fuse 3F, a fuse 4F and a diesel engine control device; the closing motor 1M is a closing motor of an isolating switch EQ1, the closing motor 2M is a closing motor of an emergency generator main switch EQ2, and the shore power switch Q3 is interlocked with the emergency generator main switch EQ 2;
the main switchboard is connected to the emergency switchboard through a contact switch Q1 and an isolating switch EQ1 in sequence, the host DG is connected to the main switchboard through a host switch Q2, shore power is connected to the main switchboard through a shore power switch Q3, and the emergency generator EG is connected to the emergency switchboard through an emergency generator main switch EQ 2;
the coil two ends of the intermediate relay 1K are respectively connected to one side of the connection switch Q1 connected with the emergency distribution board through a fuse 1F and a fuse 2F, the coil of the time relay 4K is connected in series with the normally open contact of the intermediate relay 2K, the two ends of the series circuit are connected in parallel with the two ends of the coil of the intermediate relay 1K, the normally closed contact of the isolating switch EQ1 is connected in series with the closing motor 1M, the two ends of the series circuit are connected in parallel with the two ends of the coil of the intermediate relay 1K, the normally open contact of the isolating switch EQ1 is connected in series with the coil of the undervoltage relay 1U, and the two ends of the series circuit are connected in parallel with the two ends of the coil of the intermediate relay 1K;
the normally open contact of the intermediate relay 3K is connected in parallel with the emergency generator main switch closing button 2S, the parallel circuit is connected in series with the manual position contact of the manual automatic selection switch 1S to form a first series circuit 1, the automatic position contact of the manual automatic selection switch 1S is connected in series with the normally open contact of the intermediate relay 2K to form a second series circuit 2, the coil of the intermediate relay 3K and the closing motor 2M are connected in parallel to form a second parallel circuit 3, the first series circuit 1 and the second series circuit 2 are connected in parallel to form a second parallel circuit 4, one end of the second parallel circuit 4 is connected with the emergency generator EG through a fuse 3F, the other end of the second parallel circuit 4 is sequentially connected with the first parallel circuit 3, the normally closed contact of the emergency generator main switch EQ2 and the normally closed contact of the emergency stop button 3S and then connected with the emergency generator EG through the fuse 4F, one end of a normally closed contact of the shore power switch Q3 is connected with the 2 end of the fuse 3F, the other end of the normally closed contact of the shore power switch Q3 is connected with one end of a normally closed contact of the intermediate relay 1K, the other end of the normally closed contact of the intermediate relay 1K is connected with one end of a coil of the intermediate relay 2K, the other end of the coil of the intermediate relay 2K is connected between an emergency stop button 3S and a normally closed contact of an emergency generator main switch EQ2, one end of the under-voltage relay 2U is connected between the normally closed contact of the shore power switch Q3 and the normally closed contact of the intermediate relay 1K, the other end of the under-voltage relay 2U is connected with one end of a normally open contact of the emergency generator main switch EQ2, and the other end of the normally open contact of the emergency generator main switch EQ2 is connected between the emergency stop button 3S and the normally closed contact of the emergency generator main switch EQ 2;
one end of a normally closed contact of the intermediate relay 1K is connected with the 1 end of the diesel engine control device, the other end of the normally closed contact of the intermediate relay 1K is connected with the 3 end of the diesel engine control device in series, an automatic position contact of the manual automatic selection switch 1S is connected with the two ends of the manual starting button 4S in parallel, a normally open contact of the emergency stop button 3S is connected between the 1 end and the 2 end of the diesel engine control device, one end of the normally closed contact of the intermediate relay 2K is connected with the 1 end of the diesel engine control device, the other end of the normally closed contact of the intermediate relay 2K is connected with the 2 end of the diesel engine control device after passing through a normally open contact of the emergency generator main switch EQ2, one end of a normally closed delay disconnection contact of the time relay 4K is connected with the 1 end of the diesel engine control device, and the other end of the normally closed delay disconnection contact of the time relay 4K is connected with the normally open contact of the isolating switch EQ1 in series and then connected with the 2 end of the diesel engine control device.
The aim of the invention can be further achieved by the following technical measures:
the automatic switching and delay shutdown circuit of the ship emergency generator set is characterized in that when the cooling mode of the emergency generator EG is the self-contained air cooling mode, the 4K delay time of the time relay is set to be 5 minutes.
Compared with the prior art, the invention has the beneficial effects that: the automatic switching and delay shutdown of the ship emergency generator set are realized. The emergency power supply automatically transfers the emergency load to the power supply, the emergency generator set operates for a minute at a delayed time, and the operation is stopped after the temperature of the generator is reduced, so that the unit is cooled, and the safe operation of the emergency generator set is ensured.
Drawings
FIG. 1 is a main and emergency panel main circuit diagram of the present invention;
FIG. 2 is a delay control circuit diagram of the present invention;
FIG. 3 is a control circuit diagram of the emergency generator of the present invention;
fig. 4 is a circuit diagram of the diesel engine control device of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
The invention relates to an automatic switching and delay shutdown circuit of a ship emergency generator set, which comprises an emergency generator EG, a host DG, a contact switch Q1, a host switch Q2, a shore power switch Q3, an isolating switch EQ1, an emergency generator main switch EQ2, a manual automatic selection switch 1S, an emergency generator main switch closing button 2S, an emergency stop button 3S, a manual starting button 4S, an undervoltage relay 1U, an undervoltage relay 2U, an intermediate relay 1K, an intermediate relay 2K, an intermediate relay 3K, a time relay 4K, a closing motor 1M, a closing motor 2M, a fuse 1F, a fuse 2F, a fuse 3F, a fuse 4F and a diesel engine control device; the closing motor 1M is a closing motor of an isolating switch EQ1, the closing motor 2M is a closing motor of an emergency generator main switch EQ2, and the shore power switch Q3 is interlocked with the emergency generator main switch EQ 2.
As shown in fig. 1, the main switchboard is connected to the emergency switchboard through the interconnection switch Q1 and the isolation switch EQ1 in sequence, the host DG is connected to the main switchboard through the host switch Q2, the shore power is connected to the main switchboard through the shore power box SC and the shore power switch Q3, and the emergency generator EG is connected to the emergency switchboard through the emergency generator main switch EQ 2.
As shown in fig. 2, two ends of a coil of the intermediate relay 1K are respectively connected to one side of the connection switch Q1 connected with the emergency distribution board through a fuse 1F and a fuse 2F, a coil of the time relay 4K is connected in series with a normally open contact of the intermediate relay 2K, two ends of the series circuit are connected in parallel with two ends of the coil of the intermediate relay 1K, a normally closed contact of the disconnecting switch EQ1 is connected in series with the closing motor 1M, two ends of the series circuit are connected in parallel with two ends of the coil of the intermediate relay 1K, a normally open contact of the disconnecting switch EQ1 is connected in series with a coil of the under-voltage relay 1U, and two ends of the series circuit are connected in parallel with two ends of the coil of the intermediate relay 1K.
As shown in fig. 3, the normally open contact of the intermediate relay 3K is connected in parallel with the emergency generator main switch closing button 2S, the parallel circuit is connected in series with the manual position contact of the manual automatic selection switch 1S to form a first series circuit 1, the automatic position contact of the manual automatic selection switch 1S is connected in series with the normally open contact of the intermediate relay 2K to form a second series circuit 2, the coil of the intermediate relay 3K and the closing motor 2M are connected in parallel to form a parallel circuit 3, the first series circuit 1 and the second series circuit 2 are connected in parallel to form a second parallel circuit 4, one end of the second parallel circuit 4 is connected with the emergency generator EG through the fuse 3F, the other end of the second parallel circuit 4 is connected with the emergency generator EG through the fuse 4F after being connected in series with the normally closed contact of the emergency generator main switch EQ2, one end of the normally closed contact of the normally closed switch Q3F is connected with the end of the fuse 3F, the other end of the normally closed contact of the normally closed switch Q3K is connected with the end of the under-voltage contact of the intermediate relay 1K, the other end of the normally closed contact of the normally closed switch Q2 is connected with the normally closed contact of the normally closed switch Q2K of the intermediate relay 2, and one end of the normally open contact of the emergency generator 2 is connected between the emergency generator main switch 2S and the normally closed contact of the emergency generator 2 is connected with the normally closed contact of the normally closed switch 2Q 2.
One end of a normally closed contact of the intermediate relay 1K is connected with the 1 end of the diesel engine control device, the other end of the normally closed contact of the intermediate relay 1K is connected with the 3 end of the diesel engine control device in series, an automatic position contact of the manual automatic selection switch 1S is connected with the two ends of the manual starting button 4S in parallel, a normally open contact of the emergency stop button 3S is connected between the 1 end and the 2 end of the diesel engine control device, one end of the normally closed contact of the intermediate relay 2K is connected with the 1 end of the diesel engine control device, the other end of the normally closed contact of the intermediate relay 2K is connected with the 2 end of the diesel engine control device after passing through a normally open contact of the emergency generator main switch EQ2, one end of a normally closed delay disconnection contact of the time relay 4K is connected with the 1 end of the diesel engine control device, and the other end of the normally closed delay disconnection contact of the time relay 4K is connected with the normally open contact of the isolating switch EQ1 in series and then connected with the 2 end of the diesel engine control device.
As shown in fig. 4, a circuit diagram of a conventional diesel engine control device is shown, wherein two groups of batteries are adopted as a control power supply, a starting motor is adopted as a starting element of a starting control loop, compressed air is adopted as a starting air, the speed regulation of a diesel engine is controlled by a throttle, one is that a motor drives a screw rod to rotate to regulate the throttle, and the other is that an electronic speed regulator is used for controlling. No matter what kind of diesel engine control device, three terminals 1, 2 and 3 are provided to be connected with an external control circuit.
The invention is different from the existing automatic switching circuit of the emergency generator set, and is mainly characterized in that: (1) The shore power switch Q3 on the main switchboard is interlocked with the emergency generator main switch EQ2 so as to prevent the shore power and the ship power from being connected at the same time by mistake; (2) When the main switchboard supplies power normally, as long as a contact switch Q1 communicated with an emergency switchboard on the main switchboard is cut off, an isolating switch EQ1 isolated from the main switchboard on the emergency switchboard is released in a voltage losing way, an intermediate relay 1K and a time relay 4K which is released slowly are both in a release state, the isolating switch EQ1 has no closing power supply, and the emergency generator set can be started manually or automatically when the main switchboard works normally, and an emergency generator main switch EQ2 can be closed manually or automatically, so that the emergency generator set can be checked and tested at any time; (3) If the manual automatic selection switch 1S is selected to be manually controlled, the manual starting button 4S is pressed, the emergency generator EG is started, when the rotating speed and the voltage reach rated values, the switching-on button 2S of the emergency generator main switch EQ2 is pressed, the intermediate relay 3K is sucked and self-protected, the switching-on contact is switched on, the reliable operation of the switching-on motor 2M of the emergency generator main switch EQ2 (or the switching-on coil of the emergency generator main switch EQ 2) is ensured, the switching-on of the emergency generator main switch EQ2 is ensured to supply power to the emergency distribution board, the auxiliary switching-on contact of the emergency generator main switch EQ2 is switched on to enable the under-voltage relay 2U tripping coil of the EQ2 to be powered on, and the position switch switching-off contact of the emergency generator main switch EQ2 cuts off the power supply of the intermediate relay 3K and the switching-on motor 2M; (4) If the manual automatic selection switch 1S is selected as automatic control, after the main power supply is in power failure or the interconnection switch Q1 is disconnected, a movable contact of the intermediate relay 1K is connected with an automatic starting loop of the emergency generator set, when the rotating speed and the voltage of the automatic starting loop are close to rated values, the intermediate relay 2K is attracted, the movable contact is connected to enable the closing motor 2M to be powered on to be in closing action of the emergency generator main switch EQ2 to supply power to the emergency distribution board, the auxiliary movable contact of the emergency generator main switch EQ2 is connected to enable the undervoltage relay 2U to be powered on, and the position switch movable contact of the emergency generator main switch EQ2 is disconnected from the power supply of the closing motor 2M; when the main switchboard resumes to supply power to the isolating switch EQ1, its switch-on motor 1M (or switch-on coil) gets electric to act on the isolating switch EQ1 to switch on, the auxiliary switch contact of the isolating switch EQ1 is switched on to make the under-voltage relay 1U trip coil of the isolating switch EQ1 get electric, the position switch-off contact of the isolating switch EQ1 cuts off the power supply of the switch-on motor 1M, at this moment, the main power supply and emergency power supply are in a transient parallel operation state, the intermediate relay 2K releases because the intermediate relay 1K attracts its switch-off contact, its switch-off contact resumes to normally close the emergency generator set shutdown circuit, the emergency generator EG decelerates and voltage drops, make the emergency load automatically shift to the main power supply, about 3s later, the emergency generator EG voltage can drop to make the under-voltage relay 2U under-voltage trip, the emergency switchboard is completely powered by the main power supply, the auxiliary switch-off contact of the emergency generator main switch EQ2 resumes normally open, the emergency generator EG decelerates to be in an idle operation state, because the switch-on contact of the intermediate relay 2K resumes normally open, the time relay 4K is in a normal state, the normally-off contact of the intermediate relay 2K resumes after the time delay relay is reset, the emergency generator set shutdown circuit is reset by the normally-off contact, and the emergency generator set shutdown circuit is continued to stop after the switch-off time has been reset by the switch-off. (5) When the manual-automatic selection switch 1S is selected to be manual or automatic, the emergency stop button 3S with self-locking is pressed, the emergency generator main switch EQ2 is released in a voltage-losing way, and the emergency generator set is stopped in an emergency way.
The time of the time relay 4K slow release and the time delay closing of the break contact can be set according to the cooling mode of the emergency generator set, the time is generally set to be about 5 minutes for the person with air cooling, and the time of the person with cooling circulating water is required to be determined according to the capacity of a water tank and the actual situation. If the emergency generator set is stopped immediately after the emergency generator set runs for a long time under heavy load, the machine belt cooling device stops working at the same time, so that the temperature of the emergency generator set is not reduced but is increased in a short time after the emergency generator set stops working, and adverse effects are generated on the emergency generator set. Practice shows that the emergency generator set can be stopped in a delayed manner after idling for a few minutes, and the emergency generator set can be started with a better protection effect.
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 (2)
1. The automatic switching and delay shutdown circuit of the ship emergency generator set is characterized by comprising an emergency generator EG, a host DG, a connecting switch Q1, a host switch Q2, a shore power switch Q3, an isolating switch EQ1, an emergency generator main switch EQ2, a manual and automatic selection switch 1S, an emergency generator main switch closing button 2S, an emergency stop button 3S, a manual starting button 4S, an under-voltage relay 1U, an under-voltage relay 2U, an intermediate relay 1K, an intermediate relay 2K, an intermediate relay 3K, a time relay 4K, a closing motor 1M, a closing motor 2M, a fuse 1F, a fuse 2F, a fuse 3F, a fuse 4F and a diesel engine control device; the closing motor 1M is a closing motor of an isolating switch EQ1, the closing motor 2M is a closing motor of an emergency generator main switch EQ2, and the shore power switch Q3 is interlocked with the emergency generator main switch EQ 2; the main switchboard is connected to the emergency switchboard through a contact switch Q1 and an isolating switch EQ1 in sequence, the host DG is connected to the main switchboard through a host switch Q2, shore power is connected to the main switchboard through a shore power switch Q3, and the emergency generator EG is connected to the emergency switchboard through an emergency generator main switch EQ 2; the coil two ends of the intermediate relay 1K are respectively connected to one side of the connection switch Q1 connected with the emergency distribution board through a fuse 1F and a fuse 2F, the coil of the time relay 4K is connected in series with the normally open contact of the intermediate relay 2K, the two ends of the series circuit are connected in parallel with the two ends of the coil of the intermediate relay 1K, the normally closed contact of the isolating switch EQ1 is connected in series with the closing motor 1M, the two ends of the series circuit are connected in parallel with the two ends of the coil of the intermediate relay 1K, the normally open contact of the isolating switch EQ1 is connected in series with the coil of the undervoltage relay 1U, and the two ends of the series circuit are connected in parallel with the two ends of the coil of the intermediate relay 1K; the normally open contact of the intermediate relay 3K is connected in parallel with the emergency generator main switch closing button 2S, the parallel circuit is connected in series with the manual position contact of the manual automatic selection switch 1S to form a first series circuit (1), the automatic position contact of the manual automatic selection switch 1S is connected in series with the normally open contact of the intermediate relay 2K to form a second series circuit (2), the coil of the intermediate relay 3K and the closing motor 2M are connected in parallel to form a parallel circuit (3), the first series circuit (1) and the second series circuit (2) are connected in parallel to form a second parallel circuit (4), one end of the second parallel circuit (4) is connected with an emergency generator EG after passing through the fuse 3F, the other end of the second parallel circuit (4) is connected with the first parallel circuit (3), the normally closed contact of the emergency generator main switch EQ2, the normally closed contact of the normally closed button 3S is connected with the emergency generator EG through the fuse 4F, one end of the normally closed contact of the bank switch Q3F is connected with the 2 end of the fuse 3F, the other end of the normally closed contact of the intermediate relay Q3K is connected with the normally closed contact under voltage, the other end of the normally closed contact of the intermediate relay Q3K is connected with the normally closed contact of the intermediate relay 2F, the other end of the normally closed contact of the intermediate relay EQ 2S is connected with the normally open contact of the intermediate relay 2F, one end of the normally closed contact of the intermediate relay 2 is connected with the normally open relay 2F under voltage normally down contact is connected with the normally closed contact of the normally down relay 2F, the other end of the normally open contact of the emergency generator main switch EQ2 is connected between the emergency stop button 3S and the normally closed contact of the emergency generator main switch EQ 2; one end of a normally closed contact of the intermediate relay 1K is connected with the 1 end of the diesel engine control device, the other end of the normally closed contact of the intermediate relay 1K is connected with the 3 end of the diesel engine control device in series, an automatic position contact of the manual automatic selection switch 1S is connected with the two ends of the manual starting button 4S in parallel, a normally open contact of the emergency stop button 3S is connected between the 1 end and the 2 end of the diesel engine control device, one end of the normally closed contact of the intermediate relay 2K is connected with the 1 end of the diesel engine control device, the other end of the normally closed contact of the intermediate relay 2K is connected with the 2 end of the diesel engine control device after passing through a normally open contact of the emergency generator main switch EQ2, one end of a normally closed delay disconnection contact of the time relay 4K is connected with the 1 end of the diesel engine control device, and the other end of the normally closed delay disconnection contact of the time relay 4K is connected with the normally open contact of the isolating switch EQ1 in series and then connected with the 2 end of the diesel engine control device.
2. The automatic switching and delay shutdown circuit of the ship emergency generator set according to claim 1, wherein when the cooling mode of the emergency generator EG is a self-contained air cooling mode, the 4K delay time of the time relay is set to be 5 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611048729.1A CN106655475B (en) | 2016-11-25 | 2016-11-25 | Automatic switching and delay shutdown circuit of ship emergency generator set |
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| CN201611048729.1A CN106655475B (en) | 2016-11-25 | 2016-11-25 | Automatic switching and delay shutdown circuit of ship emergency generator set |
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| CN107953475B (en) * | 2017-11-30 | 2023-08-01 | 双钱集团（江苏）轮胎有限公司 | Lower ram safety control system of internal mixer |
| CN108110726B (en) * | 2018-01-31 | 2023-10-20 | 江苏省镇江船厂（集团）有限公司 | Ship shore equipotential protection device |
| CN108519747B (en) * | 2018-03-02 | 2021-12-17 | 国网江苏省电力有限公司无锡供电分公司 | Power supply management device for dormitories of primary and middle schools |
| CN109672142B (en) * | 2019-02-01 | 2023-12-26 | 镇江达舟船舶制造有限公司 | Equipotential protection technology for low-voltage shore power system of ship |
| CN112886691B (en) * | 2021-01-28 | 2022-09-20 | 泰豪科技股份有限公司 | Power supply switching device of diesel generator set |
| CN113241843B (en) * | 2021-05-26 | 2023-02-03 | 河南柴油机重工有限责任公司 | Double-electric-start control system for ship engine |
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| CN204900161U (en) * | 2015-09-02 | 2015-12-23 | 张桂臣 | Boats and ships scene stores up wave energy and uses multipurposely power generation facility |
| CN105262208A (en) * | 2015-11-09 | 2016-01-20 | 江苏省镇江船厂（集团）有限公司 | Ship shore power automatic conversion device |
| CN206302210U (en) * | 2016-11-25 | 2017-07-04 | 江苏省镇江船厂（集团）有限公司 | Emergency Generator group automatic switching and time delay halt circuit |
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