CN109672142A - Ship low pressure bank electricity system equipotential protection technique - Google Patents
Ship low pressure bank electricity system equipotential protection technique Download PDFInfo
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- CN109672142A CN109672142A CN201910104673.4A CN201910104673A CN109672142A CN 109672142 A CN109672142 A CN 109672142A CN 201910104673 A CN201910104673 A CN 201910104673A CN 109672142 A CN109672142 A CN 109672142A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/28—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of ship low pressure bank electricity system equipotential protection techniques; use Zener diode 1V, Zener diode 2V, Zener diode 3V, Zener diode 4V, AC intermediate relay 1KA, direct current intermediate relay 2KA, fuse connection terminal X1, self-locking type button S, LED light H; burning voltage≤24V of Zener diode 1V, Zener diode 2V, Zener diode 3V, Zener diode 4V; Zener diode with detecting ship potential difference between E and bank base middle line N, it is ensured that the step voltage between shell and bank base is no more than 30V.The present invention is general in three-phase alternating current or one-phase AC-system, and Zener differential concatenation detects the potential difference between bank base and ship ground, and Zener measure loop is only briefly turned on, and can avoid damaging device when potential difference is excessively high；When ship-to-shore potential difference >=24V, automatically cut off bank electricity breaker, and bank electricity breaker can not automatic closing, bank electricity breaker after the not equal automatic brake separatings of current potential through manual reset because that could must close a floodgate again.
Description
Technical field
The present invention relates to a kind of ship low pressure bank electricity system equipotential protection techniques, belong to safety of ship technical field.
Background technique
Department of Transportation, China discloses " ship Air Pollutant Emission control zone embodiment party on December 10th, 2018
Case " (handing over sea hair (2018) 168), it is desirable that ship, which reaches port, should use bank electricity.
Currently, the voltage class of Ship Electrical Power System is mostly low pressure, and the bank electricity connect required for reaching port in ship is generally
It is essentially all that needs connect with AC low-tension bank electricity for low pressure, especially medium and small-scale vessel and inland navigation craft.
" harbour bank electricity equipment specification " (Q/GDW 11468-2016) of State Grid Corporation of China, China publication, it is desirable that
" ground fault not the side Ying An to shipboard any position generate be more than 0.03kV step voltage or contact voltage ".
" ship and the Offshore Units Legal Inspection rule inland navigation craft method of marine board, People's Republic of China (PRC) publication in 2018
Regular inspection tests technical regulation modification in 2018 notification ", it is desirable that " ship should be equipped with by hull and bank (or earthing or grounding means on landing stage) into
The facility of row equipotential link ".
For above-mentioned requirements, ships low pressure bank electricity system equipotential protection technique and development ship low pressure bank electricity system
System equipotential protective device solves the problems, such as that spot ship is protected without low pressure bank electricity system equipotential, to protect ship and personnel
Safety has a very important significance.
Summary of the invention
The purpose of the present invention is to provide a kind of ship low pressure bank electricity system equipotential protection technique, solve the prior art without
Low pressure bank electricity system equipotential protective device, when causing ship using low pressure bank electricity system power supply, because ground fault is arrived in bank side
The problem of shipboard generates step voltage or contact voltage, jeopardizes ship and personnel safety.
The purpose of the present invention is achieved by the following technical programs:
A kind of ship low pressure bank electricity system equipotential protective device, including Zener diode 1V, Zener diode 2V, Zener
Diode 3V, Zener diode 4V, AC intermediate relay 1KA, direct current intermediate relay 2KA, fuse connection terminal X1, from
Lock button S, LED light H, the Zener diode 1V, Zener diode 2V differential concatenation are at the first circuit 1, Zener two
At second circuit 2, the first circuit 1 is in parallel with second circuit 2 for pole pipe 3V, Zener diode 4V differential concatenation, and the one of parallel circuit
End is connected with the end E of shore connection box, other end series AC intermediate relay 1KA coil, the AC intermediate relay of parallel circuit
A pair of of normally opened contact of 1KA is followed by the N-terminal of shore connection box, a pair of of normally opened contact of direct current intermediate relay 2KA in described exchange
Between relay 1KA a pair of of normally opened contact it is in parallel, one end of the coil of the direct current intermediate relay 2KA is through fuse terminals
Sub- X1 connects one end of ship electricity DC24V, and the coil other end of direct current intermediate relay 2KA is after the normally-closed contact of self-locking type button S
Connect one end of the normally-closed contact of AC intermediate relay 1KA, another termination ship electricity of AC intermediate relay 1KA normally-closed contact
The other end of DC24V, two ends of the LED light H are connected to direct current intermediate relay 2KA coil both ends, relay among direct current
A pair of of normally-closed contact two of device 2KA terminates equipotential alarm circuit, driving equipotential alarm circuit work；AC intermediate relay
The electronic conjunction of bank electricity main switch is accessed after a pair of of normally opened contact series connection of a pair of of the normally-closed contact and direct current intermediate relay 2KA of 1KA
Lock circuit, another pair normally-closed contact of AC intermediate relay 1KA and another pair normally opened contact string of direct current intermediate relay 2KA
Bank electricity main switch undervoltage tripping circuit is accessed after connection.
The purpose of the present invention can also be further realized by following technical measures:
Aforementioned ship low pressure bank electricity system equipotential protective device, wherein Zener diode 1V, Zener diode 2V, Zener
Burning voltage≤24V of diode 3V, Zener diode 4V, stabling current >=1A, dynamic electric resistor≤5 Ω.
Aforementioned ship low pressure bank electricity system equipotential protective device, wherein the coil rating of AC intermediate relay 1KA is electric
Pressure≤24V, rated operational current 5A.
Aforementioned ship low pressure bank electricity system equipotential protective device, wherein the coil rating of direct current intermediate relay 2KA is electric
Pressure is DC24V, rated operational current 5A.
Compared with prior art, the beneficial effects of the present invention are: the present invention is led in three-phase alternating current or one-phase AC-system
With general, the Zener in different low-voltage alternating-current bank electricity voltage class (220V-1000V) and different frequency (50Hz or 60Hz)
Differential concatenation detects the potential difference (step voltage or contact voltage) between bank base and ship ground, and Zener measure loop is only of short duration to be connect
It is logical, it can avoid damaging device when potential difference is excessively high；When ship-to-shore potential difference >=24V, bank electricity breaker is automatically cut off, and bank electricity is disconnected
Road device can not automatic closing, after bank electricity breaker is because of the not equal automatic brake separatings of current potential, it is necessary to which, through manual reset, breaker could again
It closes a floodgate；The present invention protects sensitivity, high reliablity, is directly grounded or non_direct ground failure suitable for single-phase；The present invention is adopted
Electric and electronic component is international, domestic standard general part, is easy to select, and maintenance is few, and spare part is unified, at low cost
It is honest and clean；The present invention is widely used, can be used for the low pressure bank electricity system of different type ship.
Detailed description of the invention
Fig. 1 is generation singlephase earth fault schematic diagram when having equipotential link；
Occur single-phase to be directly grounded failure schematic diagram when Fig. 2 is no equipotential link；
Occur when Fig. 3 is no equipotential link single-phase by impedance Z ground fault schematic diagram；
Fig. 4 is equipotential protection technique principle explanatory diagram；
Fig. 5 is circuit diagram of the embodiment of the present invention.
Specific embodiment
Design considerations of the invention and principle are as follows:
1. new standard requires shore electric power that need to have N line and E line
IEC 60309-2012 " industrial plug, socket and coupler ", IEC/PAS 80005-3-2014 are " practical
Connectivity port-third portion: low-voltage bank connector (LVSC) system generally requires " etc. international standards and China's GB/T11918 " work
Industry plug, socket and coupler " etc. standards, it is specified that when ship is connect with bank electricity, single-phase bank electricity is phase line L, middle line N, ground wire E；
Three-phase bank electricity is phase line L1, L2, L3, middle line N, ground wire E.Above-mentioned requirements are consistent with the pattern of three matching system of China's AC low-tension
It closes, phase line belongs to the performance loop of shore electric power with middle line, and E is the ground wire from earthed system extraction on the bank (i.e. in GB50065
PE), belong to the safety protection loop of shore electric power.
2. the PE conductor of bank electricity system has ground connection to be coupled with N-conductor
" pattern of low-pressure system ground connection can for regulation in GB 50065-2011 " the grounding design specification of alternating-current electric device "
Be divided into 3 kinds of TN, TT, IT etc. ", " single supply system, TN power-supply system should have any to be directly grounded at power supply, device it is exposed
Conductive part should be connected to grounding point through PE ", it is indicated above that no matter the winding of power supply (transformer or generator) be star or
Delta connection, also either three-phase or single phase distribution system, all have protection conductor protective conductor
(PE) it exports, provides ground protection to power device.So the steel of ship or other metal shells should be connected to ground connection through PE
Point.
3. low pressure shore electric power is three-phase four-wire system
In the three-phase four-wire system that GB 50065-2011 specification proposes, " the TN-S system that total system opens N and PE points
System ", " PEN is separated into the TN-C-S system of 3 phase, 4 line of PE and N in the somewhere of the non-isoelectric point of device ", " device by
Electricity point PEN is separated into PE and N 3 phase, 4 line TN-C-S system ", " PEN is separated into PE's and N in the isoelectric point of device
The TN-C-S system of single-phase 2 line ", " more power supply TN-C-S systems of individual PE and N are used to electrical equipment " " all fill
Set the TT system all using separated neutral conductor and protection conductor ", it has all allotted ship and has picked up required for low pressure shore electric power
N-conductor and PE conductor；GB50065-2011 specification propose N-conductor and PE conductor " ground connection at power supply in distribution system
In ground connection, can be realized by one or more earthing poles ", i.e., N-conductor and PE conductor be at power supply and in a power distribution system
System earth connection is carried out.
4. " ship and the Offshore Units Legal Inspection rule inland navigation craft of the publication in 2018 of marine board, the People's Republic of China (PRC)
Legal Inspection technical regulation 2018 modification notification " in " equipotential link is to make barge unit and bank base device conductive component
Between the of substantially equal electrical connection of current potential ", it is desirable that shore connection box should have " for connecting the suitable socket (trip of flexible cable
Pleasure-boat) or binding post (other ships in addition to pleasure boat) and the ground connection wiring that hull is connected with ground (bank or zero curve)
Column ", it is desirable that " ship should be equipped with the facility for by hull and bank (or earthing or grounding means on landing stage) carrying out equipotential link ".So
Ship reaches port when connecing with bank electricity, it is necessary to by ship be connected with bank and realize equipotential, i.e., must by metal shell (ship E) and
Protection conductor (bank PE) on the bank is connected.
5. single-phase earthing status analysis:
When ship, which reaches port, to be connect with bank electricity, in Ship Electrical Power System occur single-phase earthing be with causing ship with bank ground potential not
Deng reason.
(1) single-phase earthing occurs when having equipotential link: when single-phase be directly grounded occurs, if shell (ship E) and
Protection conductor (bank PE) on the bank is connected, as shown in Figure 1, because of ship the current potential of the current potential of E equal to bank PE is all 0, and
Safety standard regulation ground resistance answers≤4 Ω, at this time short circuit current in single phase grounding IDVery big, breaker is by automatic trip, to protect
Hinder human body not by the injury of step voltage or contact voltage.This is that " ship and sea are executed since on January 1st, 2019
Facility Legal Inspection rule inland navigation craft Legal Inspection technical regulation modification in 2018 notification " and the requirement of newest ship construction rules
Ship reaches port when connecing with bank electricity, ship and bank ground the reason of must be set up equipotential link.
(2) without equipotential link several situations of single-phase earthing occur when:
When single-phase be directly grounded occurs, if shell (ship E) is not connected with protection conductor (bank PE) on the bank, such as
Shown in Fig. 2, because route capacitive reactance Xc is very big, therefore earth current ICVery little is negligible, breaker will not automatic trip, ship at this time
Ground E current potential is substantially equal to the current potential that ground fault phase L2 occurs, because bank base PE conductor and N-conductor have carried out simultaneously at power supply
System earth is coupled, and the current potential of PE is 0, the step voltage between shell and bank base equal to ship the current potential of E and bank PE it is 0 electric
The difference of position, step voltage or contact voltage are equal to phase voltage and seriously affect people considerably beyond the regulation (≯ 30V) of safety standard
Life safety.
When generation is single-phase to be grounded by impedance Z, if earth current IdThe movement of breaker automatic trip has not yet been reached
Electric current, at this time ship 0 current potential of E current potential and bank base PE difference it is still very high, step voltage or contact voltage are substantially equal to hair
The phase voltage of raw singlephase earth fault phase L3, seriously affects safety of human life, as shown in Figure 3.
The principle of equipotential protection technique of the present invention is as follows:
Potential difference of the present invention using burning voltage≤24V Zener diode detection ship between E and bank base middle line N,
Burning voltage is selected to be to ensure that the step voltage between shell and bank base is no more than 30V for the reason of≤24V.
Because when breaking down ship E and bank base PE line it is not connected, ship the potential difference that generates of E and bank base PE be alternating current,
Therefore 2 Zener diode differential concatenations and AC intermediate relay are used to form detection circuit, such as with 2 Zeners, Zener
The burning voltage of pipe is 12V, when ship reach port connect the single-phase earthing of any situation occurs with bank electricity when, with causing ship E and bank base
Potential difference U between middle line NNE>=12V, the Zener diode of 2 differential concatenations is breakdown in the positive and negative half cycle of alternating current respectively,
Oblique line portion as shown in Figure 4 is added on AC intermediate relay 1KA, threshold value 12V to generate positive and negative two wave impulse, when
UNEVoltage is that zero, 1KA is failure to actuate on < 12V, AC intermediate relay 1KA；Work as UNE>=12V, AC intermediate relay 1KA inhale
It closes.
The burning voltage of the burning voltage (1V/2V and 3V/4V) of 2 groups of Zener diodes can be in 24V and chosen below, use
The Zener diode of 2 groups of differential concatenations detects simultaneously to improve reliability；The operation voltage of AC intermediate relay 1KA answers≤and it is neat
The burning voltage of diode is received, to improve sensitivity.
The present invention will be further explained below with reference to the attached drawings and specific examples:
It is circuit diagram of the embodiment of the present invention as shown in Figure 5, ship low pressure bank electricity system equipotential protection dress of the present invention
Set, including Zener diode 1V, Zener diode 2V, Zener diode 3V, Zener diode 4V, AC intermediate relay 1KA,
It is direct current intermediate relay 2KA, fuse connection terminal X1, self-locking type button S, LED light H, the Zener diode 1V, neat
Diode 2V differential concatenation receiving into the first circuit 1, Zener diode 3V, Zener diode 4V differential concatenation are at second circuit 2, and
One circuit 1 is in parallel with second circuit 2, and one end of parallel circuit is connected with the end E of shore connection box, and the other end of parallel circuit, which is connected, to be handed over
Stream intermediate relay 1KA coil, AC intermediate relay 1KA a pair of of normally opened contact be followed by the N-terminal of shore connection box, among direct current after
A pair of of normally opened contact of electric appliance 2KA is in parallel with a pair of of normally opened contact of the AC intermediate relay 1KA, among the direct current after
One end of the coil of electric appliance 2KA connects one end of ship electricity DC24V, the line of direct current intermediate relay 2KA through fuse connection terminal X1
The circle other end is followed by one end of the normally-closed contact of AC intermediate relay 1KA through the normally-closed contact of self-locking type button S, and exchange is intermediate
The other end of another termination ship electricity DC24V of relay 1KA normally-closed contact, two ends of the LED light H are connected among direct current
A pair of of normally-closed contact two at relay 2KA coil both ends, direct current intermediate relay 2KA terminates equipotential alarm circuit, driving etc.
The work of current potential alarm circuit；A pair of of normally-closed contact of AC intermediate relay 1KA and a pair of direct current intermediate relay 2KA are normally opened
Bank electricity main switch electric switch-on circuit, another pair normally-closed contact and direct current of AC intermediate relay 1KA are accessed after contact series
Bank electricity main switch undervoltage tripping circuit is accessed after another pair normally opened contact series connection of intermediate relay 2KA.
For convenience of wiring, the present apparatus and disconnected bank electricity main switch, shore connection box, the line between equipotential alarm circuit can pass through
Common connecting terminal X2 line.The products such as combined aural and visual alarm can be used in equipotential alarm circuit.
In above-described embodiment, Zener diode 1V, Zener diode 2V, Zener diode 3V, Zener diode 4V it is steady
Constant voltage≤24V, stabling current >=1A, dynamic electric resistor≤5 Ω.Coil rating voltage≤24V of AC intermediate relay 1KA,
Rated operational current is 5A.The coil rating voltage of direct current intermediate relay 2KA is DC24V, rated operational current 5A.
1KA contact in Fig. 5 be it is 1 normally opened, 3 normally closed, 2KA contact is 3 normally opened, 1 normally closed.Fuse connection terminal X1,1F,
2F voltage rating >=250V, rated current 6A, 2 sections；Common connecting terminal X2, voltage rating >=250V, rated current >=6A, 8
Section；Self-locking type button S, voltage rating >=250V, rated current >=5A, 1 is normally opened, 1 normally closed；LED light H, voltage rating
24V, white.
Such as single-phase earthing status analysis, when bank base being electrically connected good between (E) to (PE) and ship, bank base ground (PE)
With ship current potential is equal between (E), i.e. step voltage or contact voltage UNE=0；When bank base (PE) and ship it is electrical between (E)
When Joint failure, bank base (PE) and ship between (E) current potential differ.
Direct current intermediate relay 2KA is protected using open cir-cuit principle with 1KA simultaneously in Fig. 5, and the working power of 2KA is by ship
Oceangoing ship DC supply for emergency DC24V is provided.
After ship electricity DC24V is connected, LED light H is bright, and 2KA is attracted, and 3 pairs of moving together contact are respectively turned on 1KA coil and return
Road connects main switch closing circuit, connects main switch undervoltage tripping circuit, so that equipotential protection is entered monitoring state, permits simultaneously
Perhaps controlled bank electricity main switch closes a floodgate, the break contact disconnecting warning circuit of 2KA.
When ship (PE) and ship between (E) potential difference be greater than the set value that (i.e. Zener 1V/2V's or 3V/4V stablizes electricity
Pressure value) when, 1KA be attracted and self-sustaining, 3 pairs of break contacts cut off respectively 2KA wire loop, cutting main switch closing circuit,
Cut off the under-voltage circuit of main switch；After 2KA resets, 3 pairs of moving together contact are disconnected, and are cut off main switch closing circuit, cut off main open
Under-voltage circuit is closed, 2KA break contact, which resets, connects output alarm signal.
After bank electricity main switch separating brake cuts off bank electricity, ship (PE) and ship between (E) potential difference eliminate, 1KA is answered automatically
Position, 3 pairs of break contacts, which reset, to be connected, and 2KA is attracted again, and equipotential protection reenters monitoring state.
After bank electricity main switch separating brake, if ship (PE) and ship between (E) potential difference opened still above setting value, bank electricity master
Pass can not close a floodgate.
Self-locking type button S is disconnected, 2KA resets, and 3 pairs of moving together contact are all off, and equipotential defencive function is cancelled,
Bank electricity main switch is by emergency cut-off or can not close a floodgate.
The present invention as bank base potential difference (step voltage between ship ground using the stable voltage of two groups of Zeners
Or contact voltage) limit value；With the Zener group and AC intermediate relay composition potential difference measure loop of two groups of differential concatenations；With
Direct current intermediate relay 2KA and AC intermediate relay 1KA, which carries out duplicate protection, all makes bank electricity as long as there is one of movement
The instantaneous automatic brake separating of main switch.
For equipotential monitoring circuit when detecting that potential difference is exceeded, 1KA is attracted and self-sustaining, improves the reliable of protection
Property, protection act because of bank eliminates with ship earth potential difference after bank electricity main switch separating brake, and 1KA automatically resets, it is ensured that measure loop
Device only of short duration energization, improves the safety of protection.
As ship-to-shore potential difference >=24V, bank electricity main switch can not close a floodgate；DC24V power supply is disconnected, equipotential protection is cancelled
When, bank electricity main switch can not also close a floodgate or by separating brake.
Using self-locking type button S is disconnected, meet the function of code requirement emergency cut-off bank electricity main switch.
It is selected by the coil voltage of burning voltage and AC intermediate relay to Zener, inhomogeneity can be full of
Potential difference limit value required by type ship is protected.
The present invention can be made into ship low pressure bank electricity system equipotential protective device, technology of the invention can also be answered
Used in shore connection box, switch-box (cabinet) circuit in carry out ship low pressure bank electricity system equipotential protection.
In addition to the implementation, the present invention can also have other embodiments, all to use equivalent substitution or equivalent transformation shape
At technical solution, be all fallen within the protection domain of application claims.
Claims (4)
1. a kind of ship low pressure bank electricity system equipotential protective device, which is characterized in that including Zener diode 1V, two pole of Zener
Pipe 2V, Zener diode 3V, Zener diode 4V, AC intermediate relay 1KA, direct current intermediate relay 2KA, fuse wiring
Terminal X1, self-locking type button S, LED light H, the Zener diode 1V, Zener diode 2V differential concatenation are at the first electricity
Road, at second circuit, the first circuit is in parallel with second circuit for Zener diode 3V, Zener diode 4V differential concatenation, electricity in parallel
The one end on road is connected with the end E of shore connection box, and the other end series AC intermediate relay 1KA coil of parallel circuit, exchange are intermediate
A pair of of normally opened contact of relay 1KA is followed by the N-terminal of shore connection box, a pair of of normally opened contact of direct current intermediate relay 2KA with it is described
A pair of of normally opened contact of AC intermediate relay 1KA is in parallel, and one end of the coil of the direct current intermediate relay 2KA is through fuse
Connecting terminal X1 connects one end of ship electricity DC24V, and the coil other end of direct current intermediate relay 2KA is through the normally closed of self-locking type button S
Contact is followed by one end of the normally-closed contact of AC intermediate relay 1KA, another termination of AC intermediate relay 1KA normally-closed contact
The other end of ship electricity DC24V, two ends of the LED light H are connected to direct current intermediate relay 2KA coil both ends, among direct current
A pair of of normally-closed contact two of relay 2KA terminates equipotential alarm circuit, driving equipotential alarm circuit work；Exchange it is intermediate after
Access bank electricity main switch electricity after a pair of of normally opened contact series connection of a pair of of the normally-closed contact and direct current intermediate relay 2KA of electric appliance 1KA
Dynamic closing circuit, the normally opened touching of another pair of another pair normally-closed contact and direct current intermediate relay 2KA of AC intermediate relay 1KA
Bank electricity main switch undervoltage tripping circuit is accessed after point series connection.
2. ship low pressure bank electricity system equipotential protective device as described in claim 1, which is characterized in that two pole of Zener
Burning voltage≤24V of pipe 1V, Zener diode 2V, Zener diode 3V, Zener diode 4V, stabling current >=1A, dynamic
Resistance≤5 Ω.
3. ship low pressure bank electricity system equipotential protective device as described in claim 1, which is characterized in that among the exchange
Coil rating voltage≤24V of relay 1KA, rated operational current 5A.
4. ship low pressure bank electricity system equipotential protective device as described in claim 1, which is characterized in that among the direct current
The coil rating voltage of relay 2KA is DC24V, rated operational current 5A.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910104673.4A CN109672142B (en) | 2019-02-01 | 2019-02-01 | Equipotential protection technology for low-voltage shore power system of ship |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910104673.4A CN109672142B (en) | 2019-02-01 | 2019-02-01 | Equipotential protection technology for low-voltage shore power system of ship |
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| CN109672142A true CN109672142A (en) | 2019-04-23 |
| CN109672142B CN109672142B (en) | 2023-12-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342467A (en) * | 2020-04-07 | 2020-06-26 | 江苏中智海洋工程装备有限公司 | Shipborne low-voltage single-loop shore power box |
| CN111355242A (en) * | 2020-04-07 | 2020-06-30 | 江苏中智海洋工程装备有限公司 | Shipborne low-voltage multi-loop shore power box |
| CN111355242B (en) * | 2020-04-07 | 2024-05-31 | 江苏玺骅电器有限公司 | Shipborne low-voltage multi-loop shore power box |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060076835A1 (en) * | 2004-10-12 | 2006-04-13 | Slocum Kim M | Shore power access system |
| KR20100124898A (en) * | 2009-05-20 | 2010-11-30 | 김풍래 | Onen phase relay circuit and open phase warning circuit for three phase motor |
| CN103812136A (en) * | 2014-02-25 | 2014-05-21 | 广州航海学院 | Mobile shore power connection device |
| 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 |
| CN106655475A (en) * | 2016-11-25 | 2017-05-10 | 江苏省镇江船厂（集团）有限公司 | Automatic switching and delay shutdown circuit of ship emergency power generation set |
| CN108110726A (en) * | 2018-01-31 | 2018-06-01 | 江苏省镇江船厂（集团）有限公司 | Ship-to-shore equipotential protective device |
| CN108448531A (en) * | 2018-05-02 | 2018-08-24 | 江苏省镇江船厂（集团）有限公司 | Landing stage three-phase four-wire system power distribution system secure protective device |
-
2019
- 2019-02-01 CN CN201910104673.4A patent/CN109672142B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060076835A1 (en) * | 2004-10-12 | 2006-04-13 | Slocum Kim M | Shore power access system |
| KR20100124898A (en) * | 2009-05-20 | 2010-11-30 | 김풍래 | Onen phase relay circuit and open phase warning circuit for three phase motor |
| CN103812136A (en) * | 2014-02-25 | 2014-05-21 | 广州航海学院 | Mobile shore power connection device |
| 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 |
| CN106655475A (en) * | 2016-11-25 | 2017-05-10 | 江苏省镇江船厂（集团）有限公司 | Automatic switching and delay shutdown circuit of ship emergency power generation set |
| CN108110726A (en) * | 2018-01-31 | 2018-06-01 | 江苏省镇江船厂（集团）有限公司 | Ship-to-shore equipotential protective device |
| CN108448531A (en) * | 2018-05-02 | 2018-08-24 | 江苏省镇江船厂（集团）有限公司 | Landing stage three-phase four-wire system power distribution system secure protective device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342467A (en) * | 2020-04-07 | 2020-06-26 | 江苏中智海洋工程装备有限公司 | Shipborne low-voltage single-loop shore power box |
| CN111355242A (en) * | 2020-04-07 | 2020-06-30 | 江苏中智海洋工程装备有限公司 | Shipborne low-voltage multi-loop shore power box |
| CN111355242B (en) * | 2020-04-07 | 2024-05-31 | 江苏玺骅电器有限公司 | Shipborne low-voltage multi-loop shore power box |
| CN111342467B (en) * | 2020-04-07 | 2024-05-31 | 江苏玺骅电器有限公司 | Shipborne low-voltage single-loop shore power box |
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