EP1657797B1 - Schutzvorrichtung für ein Laststrom führendes Gerät - Google Patents

Schutzvorrichtung für ein Laststrom führendes Gerät Download PDF

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Publication number
EP1657797B1
EP1657797B1 EP05023391A EP05023391A EP1657797B1 EP 1657797 B1 EP1657797 B1 EP 1657797B1 EP 05023391 A EP05023391 A EP 05023391A EP 05023391 A EP05023391 A EP 05023391A EP 1657797 B1 EP1657797 B1 EP 1657797B1
Authority
EP
European Patent Office
Prior art keywords
load current
protective cover
contacts
semiconductor switch
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP05023391A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1657797A1 (de
Inventor
Joachim Laschinski
Stefan Buchhold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMA Solar Technology AG
Original Assignee
SMA Solar Technology AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMA Solar Technology AG filed Critical SMA Solar Technology AG
Publication of EP1657797A1 publication Critical patent/EP1657797A1/de
Application granted granted Critical
Publication of EP1657797B1 publication Critical patent/EP1657797B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/701—Structural association with built-in electrical component with built-in switch the switch being actuated by an accessory, e.g. cover, locking member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
    • H01R13/7036—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part the switch being in series with coupling part, e.g. dead coupling, explosion proof coupling
    • H01R13/7038—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part the switch being in series with coupling part, e.g. dead coupling, explosion proof coupling making use of a remote controlled switch, e.g. relais, solid state switch activated by the engagement of the coupling parts

Definitions

  • the invention relates to a protective device for a load current-carrying device for preventing or reducing an arc during a separation process from the load current-carrying plug contacts using a switch that reduces the load current so far that a harmless load current remains with a device attachable protective cover for the load current plug contacts, the pulling the load current plug contacts difficult as long as it is attached to the device, wherein the protective cover has a means which is so in operative connection with the switch that the load current is reduced by the switch when the protective cover is removed from the device.
  • a protection device in which an arc protection is realized by a clocked semiconductor device is used. This is connected in series with an auxiliary contact.
  • the auxiliary contact is designed as a trailing contact, so that it is disconnected after the load current contact. As a result, the load current has been reduced so far, when the load current contacts are separated, that no arc is formed.
  • Inverters with an integrated DC load disconnector are known. However, it may be forgotten to operate this before the load plugs are removed. This can cause an arc, which can lead to personal injury.
  • a device for the grid connection of a solar generator wherein a module distributor and a network coupling device are provided.
  • the module distributor inputs for solar modules and an output for a network coupling device, wherein the network coupling device is connected to one or more inverters, and moreover has an output for a phase of the AC network.
  • the inverter has a cover which mechanically disconnects the inverter when it is lifted.
  • a protective device of the type mentioned is known.
  • the opening is detected by a detection switch when opening the protective cover, wherein when the detection switch responds when charging a battery or the power supply by the battery, an internal switching circuit of the power control unit is opened.
  • EP 0,437,696 A1 Published European patent application shows a wall cover of a remotely controllable socket containing electrically conductive contacts. These transmit signals from an interface located adjacent to the socket to the control unit of the remotely controllable socket. There is no significant power transfer through these contacts.
  • the invention has for its object to provide a protective device of the generic type, which protects against arcs in a simple manner.
  • the switch may be formed as a semiconductor switch, clocked semiconductor switch, as a relay or as a so-called one-time switch.
  • a one-time switch is understood to be a switch which can not be closed after a single actuation; he acts as a kind of security.
  • the protective cover according to the invention prevents on the one hand, that the load current contacts are pulled, as long as it is mounted on the device.
  • the protective cover is removable. By removing the protective cover acts the inventive means in which the clocked semiconductor device is used. This reduces the load current so far that when removing the load current contacts no or at least only a harmless arc for people can arise.
  • the protective cover according to the invention allows additional load disconnectors in the device to be dispensed with, since disconnection at high load current is not possible without the invention. In this way, the relevant standards and regulations are complied with.
  • the control means may be a mechanical or electromechanical means.
  • an actuating pin or the like may be provided on the protective cover which operates a switch provided on the device when the protective cover is mounted.
  • the switch contacts of the switch are parallel to the clocked semiconductor switch. This in turn lies in the load circuit, in particular in the DC circuit.
  • the switch is closed so that the load current flows through the switch.
  • the contact is opened so that the load current through the clocked Semiconductor switch flows. Since this current is now less or is clocked, an arc protection is given.
  • an electrical solution is used in which the protective cover has electrical contacts for electrical connection with additional contacts on the device, so that when removing the protective cover, the contacts of the protective cover separated from the additional contacts and the load current is reduced.
  • the protective cover comprises a short-circuiting bridge as a means which short-circuits the additional contacts when the protective cover is mounted over the contacts of the protective cover.
  • the short circuit bridge integrated in the protective cover creates a very simple control of the load current.
  • the shorting bridge will engage and the load current may be high. If the short-circuit bridge or the cover is removed, a lesser current sets in through the clocked semiconductor component, which interrupts the current continuously at regular or even irregular intervals.
  • the short-circuiting bridge is connected in parallel with the semiconductor component and the semiconductor component with the short-circuiting bridge lies in the load circuit.
  • a closed switch would bypass the semiconductor device.
  • the current goes the path of least resistance.
  • the load current flows through the low-resistance bridge. If this is missing because the cover has been removed, the current must flow over the clocked semiconductor switch. As a result, however, the load current is reduced to a safe level.
  • the semiconductor device can be clocked continuously, which is easy to implement. Since the load current flows through the low - impedance current bridge when the protective cover is mounted, the Semiconductor device no switching losses, resulting in a high efficiency.
  • the device comprises an inverter module and the semiconductor device is housed in a clock module which is electrically connected to the inverter module.
  • Fig. 1 shows a preferred embodiment of the protective device according to the invention for a photovoltaic inverter.
  • the inverter 1 is provided with plug contacts 2, which lead a load current for an input side DC voltage circuit.
  • plug contacts 2 PV plug 4 (photovoltaic plug) can be connected, which are connected to photovoltaic modules 3 (solar generators), such as Fig. 2 illustrated.
  • the protective device is preferably located on a DC circuit, in particular on an input-side circuit (DC circuit).
  • a protective cover 5 can be mounted, as the FIGS. 1 and 3 illustrate.
  • the protective cover 5 can be positively and / or non-positively attached to a housing of the inverter 1. When mounted, the cover prevents the PV plugs 4 from being pulled out and breaking the load circuit at high current. An interruption of the load circuit during a high load current would cause an arc.
  • a module 6 is connected in series with a clocked semiconductor switch 7 to an inverter circuit or an inverter module 8, such as Fig. 2 shows.
  • a current bridge or short-circuiting bridge 9 which is integrated in the protective cover 5.
  • the shorting bridge 9 is automatically connected to existing on the protective cover 5 contacts 10 and additional contacts 11 on the housing of the inverter 1 when the protective cover 5 is mounted. The load current can thus flow with little loss via the shorting bridge 9 during operation.
  • the short-circuiting bridge 9 is connected practically parallel to the semiconductor switch 7.
  • a device attachable protective cover 5 for the load current plug contacts 4 is present, which prevents removal of the load current plug contacts 4, as long as it is attached to the device, the protective cover 5 has an electrical and / or mechanical means (shorting bridge), which is in operative connection with the semiconductor device or the semiconductor switch 7, that the load current is reduced by the semiconductor switch 7, when the protective cover 5 is removed from the device.
  • the integrated in the protective cover 5 means or control means controls in the broadest sense in a simple manner the load current.
  • Fig. 4 shows a further circuit diagram showing the arrangement of the shorting bridge 9 and the semiconductor switch 7.
  • the short-circuiting bridge 9 preferably short-circuits additional contacts 11 or lies parallel to the semiconductor switch 7.
  • the additional contacts 11 are attached to the device.
  • the semiconductor switch 7 is driven by a clock controller 12, so that the semiconductor device is continuously clocked.
  • the timing is set so that no dangerous arc is formed at the additional contacts 11 when the protective cover 5 is removed.
  • FIGS. 5 and 6 show the principle of the current reduction according to the invention.
  • the semiconductor switch 7 is shown in simplified form as a switch. Parallel to this is the shorting bridge 9, which is also shown in simplified form as a switch.
  • the switch 9 When mounted protective cover 5, the switch 9 is closed. The load current I L flows through the switch 9, as Fig. 5 shows. If the Protective cover 5 is removed, then a reduced current I R flows through the switch 7, such as Fig. 6 shows.
  • the switch 9 could be integrated in the device and formed on the protective cover 5 mechanically actuated. For operation, an actuating pin or the like which would be attached to the protective cover 5, could serve.
  • the protective cover 5 is preferably made of plastic, for example a thermoset or thermoplastic. It has, for example, a three-dimensional shape and preferably carries end walls 14, such as Fig. 3 shows. A central web 15 stiffens the cover or serving as a handle 13 wall.
  • a separate contact 2a, 2b is used for each independent input of the inverter.
  • four or more contacts 2 are present. Therefore, several additional contact pairs are used, in particular two pairs, such as Fig. 3 shows.
  • the protective cover 5 is so inventively arranged on the inverter that in the mounted or mated state, the plug-in connections of the inverter are hidden and can not be operated. By removing the protective cover 5 by the integrated electrical contacts a function is triggered, which ensures that a maximum of a harmless for the removal of the connection plug of the inverter current flows through the plug-in connections. By removing the protective cover 5 continues to access the plug-in connections (Contacts 2) released, so that at the latest by the then following removal of the plug-in connections from the inverter a complete separation of the upstream energy source (eg PV system) takes place.
  • the upstream energy source eg PV system
  • the additional control unit for covering the inverter's connectors effectively prevents arcs that can lead to personal injury.
  • the load current is not completely switched off, but it remains a pulsed, small current.
  • the constant switching on and off of the semiconductor switch not only reduces the current, but also extinguishes an arc due to the clocking.
  • a hinge hinged cover can alternatively be used.

Landscapes

  • Inverter Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP05023391A 2004-11-13 2005-10-26 Schutzvorrichtung für ein Laststrom führendes Gerät Not-in-force EP1657797B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004054933A DE102004054933B3 (de) 2004-11-13 2004-11-13 Schutzvorrichtung für ein Laststrom führendes Gerät

Publications (2)

Publication Number Publication Date
EP1657797A1 EP1657797A1 (de) 2006-05-17
EP1657797B1 true EP1657797B1 (de) 2008-10-08

Family

ID=35744735

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05023391A Not-in-force EP1657797B1 (de) 2004-11-13 2005-10-26 Schutzvorrichtung für ein Laststrom führendes Gerät

Country Status (6)

Country Link
US (1) US7338311B2 (zh)
EP (1) EP1657797B1 (zh)
CN (1) CN100533907C (zh)
AT (1) ATE410810T1 (zh)
DE (2) DE102004054933B3 (zh)
ES (1) ES2314539T3 (zh)

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US8303349B2 (en) 2009-05-22 2012-11-06 Solaredge Technologies Ltd. Dual compressive connector
US8324921B2 (en) 2007-12-05 2012-12-04 Solaredge Technologies Ltd. Testing of a photovoltaic panel
US8384243B2 (en) 2007-12-04 2013-02-26 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US8476524B2 (en) 2009-05-22 2013-07-02 Solaredge Technologies Ltd. Electrically isolated heat dissipating junction box
US8618692B2 (en) 2007-12-04 2013-12-31 Solaredge Technologies Ltd. Distributed power system using direct current power sources
US8630098B2 (en) 2008-06-12 2014-01-14 Solaredge Technologies Ltd. Switching circuit layout with heatsink
US8947194B2 (en) 2009-05-26 2015-02-03 Solaredge Technologies Ltd. Theft detection and prevention in a power generation system
US8963369B2 (en) 2007-12-04 2015-02-24 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US9000617B2 (en) 2008-05-05 2015-04-07 Solaredge Technologies, Ltd. Direct current power combiner
US9112379B2 (en) 2006-12-06 2015-08-18 Solaredge Technologies Ltd. Pairing of components in a direct current distributed power generation system
US9130401B2 (en) 2006-12-06 2015-09-08 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US9291696B2 (en) 2007-12-05 2016-03-22 Solaredge Technologies Ltd. Photovoltaic system power tracking method

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US9088178B2 (en) 2006-12-06 2015-07-21 Solaredge Technologies Ltd Distributed power harvesting systems using DC power sources
US11735910B2 (en) 2006-12-06 2023-08-22 Solaredge Technologies Ltd. Distributed power system using direct current power sources
US11309832B2 (en) 2006-12-06 2022-04-19 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US7900361B2 (en) 2006-12-06 2011-03-08 Solaredge, Ltd. Current bypass for distributed power harvesting systems using DC power sources
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US11296650B2 (en) 2006-12-06 2022-04-05 Solaredge Technologies Ltd. System and method for protection during inverter shutdown in distributed power installations
US8319471B2 (en) 2006-12-06 2012-11-27 Solaredge, Ltd. Battery power delivery module
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US10673222B2 (en) 2010-11-09 2020-06-02 Solaredge Technologies Ltd. Arc detection and prevention in a power generation system
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US10230310B2 (en) 2016-04-05 2019-03-12 Solaredge Technologies Ltd Safety switch for photovoltaic systems
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US9130401B2 (en) 2006-12-06 2015-09-08 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US8384243B2 (en) 2007-12-04 2013-02-26 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US8618692B2 (en) 2007-12-04 2013-12-31 Solaredge Technologies Ltd. Distributed power system using direct current power sources
US8963369B2 (en) 2007-12-04 2015-02-24 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US8324921B2 (en) 2007-12-05 2012-12-04 Solaredge Technologies Ltd. Testing of a photovoltaic panel
US9291696B2 (en) 2007-12-05 2016-03-22 Solaredge Technologies Ltd. Photovoltaic system power tracking method
US9000617B2 (en) 2008-05-05 2015-04-07 Solaredge Technologies, Ltd. Direct current power combiner
US8630098B2 (en) 2008-06-12 2014-01-14 Solaredge Technologies Ltd. Switching circuit layout with heatsink
US8303349B2 (en) 2009-05-22 2012-11-06 Solaredge Technologies Ltd. Dual compressive connector
US8476524B2 (en) 2009-05-22 2013-07-02 Solaredge Technologies Ltd. Electrically isolated heat dissipating junction box
US8947194B2 (en) 2009-05-26 2015-02-03 Solaredge Technologies Ltd. Theft detection and prevention in a power generation system

Also Published As

Publication number Publication date
EP1657797A1 (de) 2006-05-17
ATE410810T1 (de) 2008-10-15
US20060077599A1 (en) 2006-04-13
DE102004054933B3 (de) 2006-05-04
CN100533907C (zh) 2009-08-26
CN1773803A (zh) 2006-05-17
US7338311B2 (en) 2008-03-04
ES2314539T3 (es) 2009-03-16
DE502005005603D1 (de) 2008-11-20

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