BACKGROUND OF THE INVENTION
1. Field of the Invention
[0001] The present invention relates to over voltage protection in low voltage distribution
system, more particularly, to a surge protection device with short-circuit current
protection function.
2. The Related Art
[0002] Because of the factors such as current impacts, frequency voltage fluctuation and
environment temperature change, elements in voltage limiting type SPD, such as piezoresistors
will meet degradation or short-circuit malfunction, which may result in failures such
as overheat, short-circuit or electric shock. Such failures may threaten the surrounding
people or articles, or even the system itself. Therefore, voltage limiting type SPDs
must have degradation or short-circuit protection, that means, voltage limiting type
SPDs shall have releases for preventing thermal breakdown (i.e. providing thermal
protection) or short-circuit malfunctions (i.e. providing short-circuit protection).
When degradation or short-circuit malfunction occurs in a voltage limiting type SPD,
the release may disconnect the SPD from a system, so that the malfunction will not
propagate to the system or cause a fire.
[0003] In existing protection techniques for voltage limiting SPDs, external connected overcurrent
protection elements are usually used as releases for preventing thermal breakdown.
The overcurrent protection elements include breakers, fuses or residual current operated
protective devices (RCD). The external overcurrent protection elements are designed
based on power frequency characteristics and do not have corresponding surge performance
indexes, thus the power frequency performance and the surge performance may not match
in actual applications. Possible results of such mismatch include: the external overcurrent
protection element is not able to bear the surge impact which is matched to the voltage
limiting type SPD; or an overall residual voltage Up value of a combination of the
overcurrent protection element and the SPD is not able to be determined. Such problems
will influence the safety and protection effect of the voltage limiting SPDs.
[0004] The Chinese patent application
CN 101 320 658 A, entitled "surge protection device with backup protection" discloses a surge protection
device according to the preamble of claim 1, with backup protection. The surge protection
device integrates a short-circuit protection component and a surge protection component,
and overcomes the problem of high residual voltage brought by using an external overcurrent
protection device as backup protection for a voltage limiting type SPD.
[0005] However, the SPD disclosed in this application still have some drawbacks, for example:
1) the current capacity is small; 2) the short-circuit breaking capacity is low; 3)
a protection to a small multiple overload current is not provided and the protection
range is narrow; 4) the reliability of the short-circuit protection device is not
high; 5) a protection under temporary overvoltage (TOV) caused by a system malfunction
due to large capacity surge current impact is not considered; 6) an overall volume
of the product is large.
SUMMARY
[0006] The present invention relates to a voltage limiting type surge protection device
with short-circuit protection function, as defined in appended claim 1.
[0007] Such a surge protection device comprises a surge protection module and a short-circuit
current protection module. The surge protection module discharges and suppresses a
surge current and voltage and the surge protection module is a plug-in type module.
The short-circuit current protection module has short-circuit protection function
and is integrated in a pedestal. The short-circuit protection module is recoverable
and provides short-circuit protection and plug-in mounting for the surge protection
module.
[0008] In an embodiment, the short-circuit protection module comprises: a base and a lid,
a moving contact and a static contact, a lightning sensitive switch, an electromagnetic
mechanism, an elastic connection piece, a baffle plate, a first connection terminal,
a second connection terminal, a first elastic plug and a second elastic plug. The
lid covers the base to form a housing of the pedestal. The static contact includes
a bracket. The lightning sensitive switch is connected to the static contact and the
elastic connection piece. The electromagnetic mechanism includes an iron yoke and
a coil. The elastic connection piece includes an elastic terminal, an upper curved
extension part and a lower extension part. The baffle plate is mounted on the base,
the baffle plate and the base forms a self-extinguishing arc extinguishing chamber.
The first connection terminal is connected to an external phase line. The second connection
terminal is connected to an external phase line or a ground line. The first elastic
plug and the second elastic plug is connected to the surge protection module, the
first elastic plug is connected to the first connection terminal and the second elastic
plug is connected to the second connection terminal.
[0009] In an embodiment, the bracket of the static contact is a U shaped static bracket
so as to ensure that the direction of a current flowing through the static contact
is consistent with the direction of a current flowing through the moving contact.
[0010] In an embodiment, a high resistance coil with a resistance larger than 200m Ω is
used to provide a high current limiting capacity. The lightning sensitive switch is
connected in parallel with the high resistance coil and a first end of the lightning
sensitive switch is connected to bracket of the static contact.
[0011] In an embodiment, the second end of the lightning sensitive switch is connected to
an elastic terminal of the elastic connection piece, the elastic connection piece
provides an elastic force for pressing the lightning sensitive switch. An upper extension
part of the bracket of the static contact is welded to a first end of the coil at
an extension part of the iron yoke. The upper curved extension part of the elastic
connection piece is welded to a second end of the coil, the lower extension part of
the elastic connection piece is connected to a first elastic plug through a connection
piece.
[0012] In an embodiment, a ladder shaped grates is disposed on the baffle plate.
[0013] In an embodiment, the moving contact is made of silver tungsten alloy material, the
static contact is made of silver tungsten carbide alloy material.
[0014] In an embodiment, the lightning sensitive switch is a ceramic gas discharge tube
with a nominal DC breakdown voltage higher than 250V.
[0015] In an embodiment, the short-circuit current protection module further comprises a
handle, an operation mechanism, a block plate and a remote alarm device which is optionally
installed.
[0016] In an embodiment, the surge protection module comprises a first plug plate and a
second plug plate, the first plug plate and the second plug plate are plugged with
the first elastic plug and the second elastic plug.
[0017] In an embodiment, an overall width of the product is 27mm or 36mm, a width of the
surge protection module is 9mm or 18mm. The surge protection module has convex edges
with different heights on both sides, the short-circuit current protection module
has grooves with corresponding heights on corresponding surfaces, so that plug operations
in error may be avoided.
[0018] The surge protection device with short-circuit protection function of the present
invention has the following advantages:
- 1) The problem of coordination between a lightning impact current and a power frequency
short-circuit current is solved, and the overall circuit has a high current limiting
capacity. High resistance resistors with positive temperature coefficient, such as
a high resistance coil with a resistance higher than 200m Ω is preferred. The surge
protection device has a strong current limiting capacity, in other words, a strong
short-circuit current protection capacity and a good short-circuit breaking capacity.
- 2) The surge protection device provides protection to a small multiple overload current.
The minimal short-circuit current that can be protected is 10A. The surge protection
device provides protection to a broad range of short-circuit currents and may be applied
to any type of grounding systems.
- 3) A recoverable temporary overvoltage (TOV) tolerance mode is provided, flaming under
traditional TOV failure and tolerance mode is eliminated so as to avoid fire hazards.
The product has a high safety reliability.
- 4) The principle of opening the contact in advance by an electrical force is changed,
actions in error will not occur even under a large capacity lightning impact current,
so the service life of the product is increased.
- 5) The residual voltage Up is controllable, a power frequency current and a surge
current may be converted quickly through dual channels with high flexibility and high
reliability. A frequency sensitive switch not only considers the system over voltage,
but also the operation over voltage. An action in error of the lightning sensitive
switch may be prevented so as to ensure the stability and a high short-circuit breaking
capacity of the product.
- 6) Ablation resistant materials are used for contacts so as to increase the ablation
resistance and anti-electrical wear ability. The contact pressure changes in a small
range even under a large capacity lightning impact current.
- 7) The lightning sensitive switch is connected in a manner of elastic connection,
so that the integrity of the lightning sensitive switch during assembly is guaranteed
and the assembly process is facilitated.
- 8) The attraction of contacts with a same direction of currents and a high resistance
resistor with positive temperature coefficient may reduce the requirements of arc
extinction. Gas channels are enlarged to facilitate the gas exclusion, gas quenching
is utilized such that the volume of the product is smaller.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The above and other features, natures, and advantages of the invention will be apparent
by the following description of the embodiments incorporating the drawings, wherein,
Fig. 1 illustrates an overall structural diagram of a surge protection device with
short-circuit current protection function according to an embodiment of the present
invention.
Fig. 2 illustrates a structural diagram of a surge protection module in the surge
protection device with short-circuit current protection function according to an embodiment
of the present invention.
Fig. 3 illustrates a structural diagram of the surge protection module mounting to
a pedestal in the surge protection device with short-circuit current protection function
according to an embodiment of the present invention.
Fig. 4 illustrates a structural diagram of a short-circuit current protection module
in the surge protection device with short-circuit current protection function according
to an embodiment of the present invention.
Fig. 5 illustrates a structural diagram of a baffle plate of the short-circuit current
protection module in the surge protection device with short-circuit current protection
function according to an embodiment of the present invention.
Fig. 6 illustrates a structural diagram of a self-extinguishing arc extinguishing
chamber of the short-circuit current protection module in the surge protection device
with short-circuit current protection function according to an embodiment of the present
invention.
DETAILED DESCRIPTION OF EMBODIMENTS
[0020] The present invention discloses a surge protection device with short-circuit protection
function. The surge protection device comprises a surge protection module and a short-circuit
current protection module. The surge protection module discharges and suppresses a
surge current and voltage and the surge protection module is a plug-in type module.
The short-circuit current protection module is integrated in a pedestal and provides
short-circuit protection and plug-in mounting for the surge protection module.
[0021] The short-circuit current protection module comprises: a base and a lid, a moving
contact and a static contact, a lightning sensitive switch, an electromagnetic mechanism,
an elastic connection piece, a baffle plate, a first connection terminal, a second
connection terminal, a first elastic plug and a second elastic plug. The lid covers
the base to form a housing of the pedestal. The static contact includes a bracket
which is a U shaped static bracket. The electromagnetic mechanism includes an iron
yoke and a coil, the coil is connected to a high resistance resistor with a resistance
larger than 200m Ω. The electromagnetic mechanism has a strong current limiting capacity.
The lightning sensitive switch is connected to the static contact and the elastic
connection piece. The lightning sensitive switch is connected in parallel with the
coil. A first end of the lightning sensitive switch is connected to the bracket of
the static contact. A second end of the lightning sensitive switch is connected to
an elastic terminal of the elastic connection piece. The elastic connection piece
provides an elastic force for pressing the lightning sensitive switch. An upper extension
part of the bracket of the static contact is welded to a first end of the coil at
an extension part of the iron yoke. An upper curved extension part of the elastic
connection piece is welded to a second end of the coil. A lower extension part of
the elastic connection piece is connected to the first elastic plug through a connection
piece. The elastic connection piece includes an elastic terminal, an upper curved
extension part and a lower extension part. The baffle plate is mounted on the base
and a ladder shaped grate is disposed on the baffle plate, so that the baffle plate
and the base form a self-extinguishing arc extinguishing chamber. The first connection
terminal is connected to an external phase line. The second connection terminal is
connected to an external phase line or a ground line. The first elastic plug and the
second elastic plug are connected to the surge protection module. The first elastic
plug is connected to the first connection terminal and the second elastic plug is
connected to the second connection terminal.
[0022] The moving contact is made of silver tungsten alloy material. The static contact
is made of silver tungsten carbide alloy material. The lightning sensitive switch
is a ceramic gas discharge tube with a nominal DC breakdown voltage higher than 250V.
The short-circuit current protection module further includes a handle, an operation
mechanism, a block plate and a remote alarm device which is optionally installed.
[0023] The surge protection module includes a first plug plate and a second plug plate.
The first plug plate and the second plug plate are plugged with the first elastic
plug and the second elastic plug. An overall width of the product is 27mm or 36mm.
A width of the surge protection module is 9mm or 18mm. The surge protection module
has convex edges on both sides and the short-circuit current protection module has
grooves on corresponding surfaces.
[0024] The surge protection device with short-circuit protection function of the present
invention has the following characteristics:
- 1) High resistance resistors with positive temperature coefficient are used to enhance
the short-circuit current protection. A high resistance coil with a resistance higher
than 200m Ω is used so the product has a good short-circuit breaking capacity. The
electromagnetic mechanism may act under a small failure current. The product has a
small minimal instantaneous tripping current value, provides protection to a broad
range of short-circuit currents and may be applied to any type of grounding systems.
- 2) A recoverable temporary overvoltage (TOV) tolerance mode is provided, sparks or
flaming is eliminated.
- 3) The currents flowing through the moving contact and the static contact have a same
direction so that the electrical opening force is reduced. The bracket of the static
contact has a U shaped static structure. The moving contact and a near side of the
U shaped static bracket (mounted with the static contact) which is close to the moving
contact will attract each other under the electrical force. When a large current capacity
impact occurs, a response time of moving contact opening will be delayed and an impact
force caused by moving contact opening is small, therefore the operation mechanism
will not trip by mistake. Assisted by the high resistance current limiting and the
design that the contacts may open only when the electromagnetic mechanism acts, the
operation mechanism has a high stability.
- 4) The lightning sensitive switch in a frequency sensitive current conversion switch
is disposed in such a manner that, when a surge current intrudes, the surge current
is discharged by the lightning sensitive switch first. The current after discharge
then flows through the coil, thus the surge energy born by the coil and the high resistance
resistor is significantly decreased. The surge bearing capacity of the short-circuit
protection module is increased.
- 5) A self-extinguishing arc extinguishing chamber is formed within the product to
replace an original coupled interrupter, so that the volume of the product is reduced.
The self-extinguishing arc extinguishing chamber is formed as follows: a ladder shaped
grate is designed on the elements, after assembly, a semi-hermetic interrupter forms
around a position where the moving contact and the static contact close or open, and
the moving contact and the static contact are completely surrounded by the interrupter.
Because of the current limiting by the high resistance resistor, when the moving contact
opens, the arc current is not so large even under a large failure current, the arc
is extinguished at the first time by gas quenching.
- 6) The moving contact is made of silver tungsten alloy material. The static contact
is made of silver tungsten carbide alloy material.
- 7) The nominal DC breakdown voltage of the lightning sensitive switch is higher than
250V.
- 8) The surge protection module may prevent plug in error.
[0025] Fig. 1 ∼ Fig. 6 illustrate the structural diagrams of an surge protection device
with short-circuit current protection function according to an embodiment of the present
invention. As shown in Fig. 1 ∼ Fig. 6, the surge protection device 100 with short-circuit
current protection function solves the problems brought by using an external overcurrent
protection device as backup protection. The surge protection device 100 with short-circuit
current protection function includes a short-circuit current protection module 101
and a surge protection module 102. The short-circuit current protection module 101
is used to protect the surge protection module 102. The surge protection module 102
is used to discharge and suppress a surge current and voltage. The short-circuit current
protection 101 is integrated in a pedestal for mounting the surge protection module
102. The surge protection module 102 is plug-in type.
[0026] The short-circuit current protection module 101 comprises a base 103, a lid 105,
a moving contact 106, a static contact 107, a lightning sensitive switch 108, an electromagnetic
mechanism 109, a handle 110, an operation mechanism 111, an elastic connection piece
112, a baffle plate 113, a block plate 114, a first connection terminal 115, a second
connection terminal 116, a first elastic plug 117, a second elastic plug 118 and a
remote alarm device 104, the remote alarm device 104 is optionally installed.
[0027] The lid 105 covers the base 103 to form a housing of the pedestal, that is, the housing
of the surge protection module 102. The static contact 107 includes a bracket 107a.
The bracket 107a is a U shaped static bracket using a U shaped static structure so
as to ensure that the direction of a current flowing through the static contact 107
is consistent with the direction of a current flowing through the moving contact 106.
Thus, the moving contact 106 and a near side of the U shaped static bracket (mounted
with the static contact) which is close to the moving contact will attract each other
under the electrical force. When a large current capacity impact occurs, a response
time of moving contact opening will be delayed and an impact force caused by moving
contact opening is small, therefore the operation mechanism 111 will not trip by mistake.
[0028] The electromagnetic mechanism 109 includes an iron yoke 109a and a coil 109b. The
coil 109b includes a high resistance resistor and the high resistance resistor performs
current limiting for the coil 109b. The resistance of the high resistance resistor
is larger than 300m Ω. The number of windings of the coil 109b is larger than 100
turns, which may facilitate the actions of the electromagnetic mechanism under a low
fault current while ensuring a high breaking capacity of the short-circuit protection
module.
[0029] The lightning sensitive switch 108 is connected in parallel with the coil 109b of
the electromagnetic mechanism in electrical connection. Further, a first end of the
lightning sensitive switch 108 is connected to the U shaped static bracket 107a of
the static contact 107. A second end of the lightning sensitive switch 108 is connected
to an elastic terminal of the elastic connection piece 112. The elastic connection
piece 112 provides an elastic force for pressing the lightning sensitive switch 108.
The elastic connection piece 112 includes an elastic terminal, an upper curved extension
part and a lower extension part. An upper extension part of the U shaped static bracket
107a, on which the static contact 107 is mounted, is welded to a first end of the
coil 109b at an extension part of the iron yoke 109a. The upper curved extension part
of the elastic connection piece 112 is welded to a second end of the coil 109b. The
lower extension part of the elastic connection piece 112 is connected to a first elastic
plug 117 through a connection piece 119. In such a connection type, the lightning
sensitive switch is disposed in front of the coil of the electromagnetic mechanism
in electrical route. More particularly, when a surge current intrudes, the surge current
is discharged by the lightning sensitive switch first. The current after discharge
then flows through the coil, thus the surge energy born by the coil and the high resistance
resistor is significantly decreased. The surge bearing capacity of the short-circuit
protection module is increased.
[0030] The base 103 and the baffle plate 113 are assembled and form a self-extinguishing
arc extinguishing chamber 120 within the product. More particularly, a ladder shaped
grate is disposed on the baffle plate 113, when the base 103 and the baffle plate
113 are assembled tightly, a semi-hermetic interrupter 120 forms around a position
where the moving contact and the static contact close or open. The moving contact
and the static contact are completely surrounded by the interrupter. When the moving
contact opens and generates an arc, the arc is driven by the electrical force and
moves downward along one side of the U shaped static bracket, the arc is directly
cut by the ladder shaped grate at the first time and is extinguished.
[0031] The short-circuit current protection module 101 is integrated within the pedestal
for mounting the surge protection module 102. The first connection terminal and the
second connection terminal for connecting external lines are both disposed within
the short-circuit current protection module. The first connection terminal 115 disposed
within the short-circuit current protection module is used to connect an external
phase line, and the second connection terminal 116 disposed within the short-circuit
current protection module is used to connect an external phase line or a ground line.
The first connection terminal 115 disposed within the short-circuit current protection
module is connected to the first elastic plug 117 for mounting the surge protection
module through a series of internal electrical connections, and the second connection
terminal 116 disposed within the short-circuit current protection module is connected
to the second elastic plug 118 for mounting the surge protection module, so that the
short-circuit protection module provides backup protection to the surge protection
module.
[0032] The surge protection module 102 is designed to have a plug-in structure, which may
be replaced easily and quickly. The first plug plate 122 and the second plug plate
123 of the surge protection module 102 are plugged into the corresponding first elastic
plug 117 and the second elastic plug 118 of the short-circuit current protection module
respectively, so that the surge protection module and the short-circuit current protection
module are connected to each other. The surge protection module has convex edges 121
with different heights on both sides, and the short-circuit current protection module
has grooves corresponding to different heights on corresponding mounting surfaces,
therefore the surge protection module may be mounted reliably and plug operations
in error may be avoided.
[0033] The width of the surge protection module 102 is designed to be 9mm or 18mm, which
complies to the international practice and may obtain a strong mounting compatibility.
[0034] The moving contact 106 is made of silver tungsten alloy material. The static contact
107b is made of silver tungsten carbide alloy material. The alloy material may attenuate
the erosion of the moving contact and the static contact caused by the surge energy.
The short-circuit current protection module still works after multiple impacts of
large current capacity, the service life of the short-circuit current protection module
is increased.
[0035] The lightning sensitive switch 108 is a switch element, and is preferred to be a
gas discharge tube, such as a ceramic gas discharge tube. The nominal DC breakdown
voltage of the ceramic gas discharge tube is higher than 250V.
[0036] The surge protection device with short-circuit protection function of the present
invention has the following advantages:
- 1) The problem of coordination between a lightning impact current and a power frequency
short-circuit current is solved, and the overall circuit has a high current limiting
capacity. High resistance resistors with positive temperature coefficient, such as
a high resistance coil with a resistance higher than 200m Ω is preferred. The surge
protection device has a strong current limiting capacity, in other words, a strong
short-circuit current protection capacity and a good short-circuit breaking capacity.
- 2) The surge protection device provides protection to a small multiple overload current.
The minimal short-circuit current that can be protected is 10A. The surge protection
device provides protection to a broad range of short-circuit currents and may be applied
to any type of grounding systems.
- 3) A recoverable temporary overvoltage (TOV) tolerance mode is provided, flaming under
traditional TOV failure and tolerance mode is eliminated so as to avoid fire hazards.
The product has a high safety reliability.
- 4) The principle of opening the contact in advance by an electrical force is changed,
actions in error will not occur even under a large capacity lightning impact current,
so the service life of the product is increased.
- 5) The residual voltage Up is controllable, a power frequency current and a surge
current may be converted quickly through dual channels with high flexibility and high
reliability. A frequency sensitive switch not only considers the system over voltage,
but also the operation over voltage. An action in error of the lightning sensitive
switch may be prevented so as to ensure the stability and a high short-circuit breaking
capacity of the product.
- 6) Ablation resistant materials are used for contacts so as to increase the ablation
resistance and anti-electrical wear ability. The contact pressure changes in a small
range even under a large capacity lightning impact current.
- 7) The lightning sensitive switch is connected in a manner of elastic connection,
so that the integrity of the lightning sensitive switch during assembly is guaranteed
and the assembly process is facilitated.
- 8) The attraction of contacts with a same direction of currents and a high resistance
resistor with positive temperature coefficient may reduce the requirements of arc
extinction. Gas channels are enlarged to facilitate the gas exclusion, gas quenching
is utilized such that the volume of the product is smaller.
[0037] The above embodiments are provided to those skilled in the art to realize or use
the invention, under the condition that various modifications or changes being made
by those skilled in the art without departing the scope of the invention, the above
embodiments may be modified and changed variously, therefore the protection scope
of the invention is not limited by the above embodiments, rather, it should conform
to the scope defined by the appended claims.
1. A surge protection device (100) with short-circuit protection function, comprising:
a surge protection module (102) discharging and suppressing a surge current and voltage,
the surge protection module being a plug-in type module;
a short-circuit current protection module (101) integrated in a pedestal and providing
short-circuit protection and plug-in mounting for the surge protection module,
wherein the short-circuit current protection module (10) comprises:
a moving contact (106) and a static contact (107), the static contact including a
bracket (107a);
an electromagnetic mechanism (109) including an iron yoke (109a) and a coil (109b);
and
a lightning sensitive switch (108) connected to the static contact (107) and an elastic
connection piece (112), the lightning sensitive switch (108) being connected in parallel
with the coil (109b) and a first end of the lightning sensitive switch (108) being
connected to the bracket (107a) of the static contact, characterised in that
the bracket (107a) is a U shaped static bracket and direction of a current flowing
through the static contact is consistent with the direction of a current flowing through
the moving contact, and in that the coil (109b) includes a resistor with positive temperature coefficient.
2. The surge protection device (100) with short-circuit protection function according
to claim 1, wherein the short-circuit protection module (101) further comprises:
a base (103) and a lid (105), the lid covering the base to form a housing of the pedestal;
an elastic connection piece (112) including an elastic terminal, an upper curved extension
part and a lower extension part;
a baffle plate (113) mounted on the base (103), the baffle plate and the base forming
a self-extinguishing arc extinguishing chamber (120);
a first connection terminal (115) connected to an external phase line;
a second connection terminal (116) connected to an external phase line or a ground
line;
a first elastic plug (117) and a second elastic plug (118) for connecting to the surge
protection module (102), the first elastic plug (117) being connected to the first
connection terminal (115) and the second elastic plug (118) being connected to the
second connection terminal (116).
3. The surge protection device with short-circuit protection function according to claim
1 or 2, wherein
the resistor is a high resistance resistor with a resistance larger than 500m Q .
4. The surge protection device with short-circuit protection function according to claim
3, wherein
the second end of the lightning sensitive switch (108) is connected to an elastic
terminal of the elastic connection piece (112), the elastic connection piece provides
an elastic force for pressing the lightning sensitive switch;
an upper extension part of the bracket (107a) of the static contact is welded to a
first end of the coil (109b) at an extension part of the iron yoke (109a);
the upper curved extension part of the elastic connection piece (112) is welded to
a second end of the coil (109b), the lower extension part of the elastic connection
piece (112) is connected to a first elastic plug through a connection piece.
5. The surge protection device with short-circuit protection function according to claim
2, wherein a ladder shaped grate is disposed on the baffle plate (113).
6. The surge protection device with short-circuit protection function according to any
of claims 1 to 5, wherein
the moving contact (106) is made of silver tungsten alloy material;
the static contact (107) is made of silver tungsten carbide alloy material.
7. The surge protection device with short-circuit protection function according to any
of claims 1 to 6, wherein
the lightning sensitive switch (108) is a ceramic gas discharge tube with a nominal
DC breakdown voltage higher than 250V.
8. The surge protection device with short-circuit protection function according to any
of claims 1 to 7, wherein the short-circuit current protection module (101) further
comprises a handle (110), an operation mechanism (111), a block plate (114) and a
remote alarm device (104) which is optionally installed.
9. The surge protection device with short-circuit protection function according to any
of claims 1 to 8, wherein the surge protection module (102) comprises a first plug
plate (122) and a second plug plate (123), the first plug plate (122) and the second
plug plate (123) are plugged with the first elastic plug (117) and the second elastic
plug (118).
10. The surge protection device with short-circuit protection function according to any
of claims 1 to 9, wherein
a width of the surge protection module (102) is 9mm or 18mm;
the surge protection module (102) has convex edges with different heights on both
sides, the short-circuit current protection module (101) has grooves with corresponding
heights on corresponding surfaces.
1. Überspannungsschutzvorrichtung (100) mit Kurzschlussschutzfunktion, umfassend:
ein Überspannungsschutzmodul (102) zum Entladen und Unterdrücken eines Überstroms
bzw. einer Überspannung, wobei das Überspannungsmodul ein Steckmodul ist;
ein in einem Sockel integriertes Kurzschlussschutzmodul (101), das einen Kurzschlussschutz
und eine Steckbefestigung für das Überspannungsmodul bereitstellt,
wobei das Kurzschlussschutzmodul (101) umfasst:
einen beweglichen Kontakt (106) und einen statischen Kontakt (107), wobei der statische
Kontakt einen Bügel (107a) aufweist;
einen elektromagnetischen Mechanismus (109) mit einem Eisenjoch (109a) und einer Spule
(109b);
einen mit dem statischen Kontakt (107) und einem elastischen Verbindungsteil (112)
verbundenen Blitzschlagschalter (108), wobei der Blitzschlagschalter (108) parallel
geschaltet ist mit der Spule (109b) und ein erstes Ende des Blitzschlagschalters (108)
mit dem Bügel (107a) des statischen Kontakts verbunden ist,
dadurch gekennzeichnet,
dass der Bügel (107a) ein U-förmiger statischer Bügel ist und die Richtung eines durch
den statischen Kontakt fließenden Stroms einer Richtung eines durch den beweglichen
Kontakt fließenden Stroms entspricht,
und
dass die Spule (109) einen Widerstand mit einem positiven Temperaturkoeffizienten aufweist.
2. Überspannungsschutzvorrichtung (100) mit Kurzschlussschutzfunktion gemäß Anspruch
1, wobei das Kurzschlussschutzmodul (101) des Weiteren umfasst:
eine Basis (103) und einen Deckel (105), wobei zur Ausbildung eines Gehäuses des Sockels
der Deckel die Basis bedeckt;
ein elastisches Verbindungsteil (112) mit einem elastischen Anschluss, ein oberes
gebogenes Verlängerungsteil und ein unteres elastisches Verbindungsteil;
eine auf der Basis (103) angebrachte Sperrplatte (113), wobei die Sperrplatte und
die Basis eine selbstlöschende lichtbogenlöschende Kammer (120) bilden;
einen ersten mit einer externen Phasenleitung verbundenen Verbindungsanschluss (115);
einen zweiten mit einer externen Phasenleitung oder einer Masseleitung verbundenen
Verbindungsanschluss (116),
einen ersten elastischen Stecker (117) und einen zweiten elastischen Stecker (118)
zur Verbindung mit dem Überspannungsmodul (102), wobei der erste elastische Stecker
(117) mit dem ersten Verbindungsanschluss (115) verbunden ist und der zweite elastische
Stecker (118) mit dem zweiten Verbindungsanschluss (116) verbunden ist.
3. Überspannungsschutzvorrichtung mit Kurzschlussschutzfunktion gemäß Anspruch 1 oder
2, wobei
der Widerstand ein hochohmiger Widerstand mit einem Widerstand von mehr als 500 mΩ
ist.
4. Überspannungsschutzvorrichtung mit Kurzschlussschutzfunktion gemäß Anspruch 3, wobei
das zweite Ende des Blitzschlagschalters (108) mit einem elastischen Anschluss des
elastischen Verbindungsteils (112) verbunden ist und das elastische Verbindungsteil
eine elastische Kraft zum Drücken des Blitzschlagschalters (108) ausübt;
ein oberes Verlängerungsteil des Bügels (107a) des statischen Kontakts an ein erstes
Ende der Spule (109b) an einem Verlängerungsteil des Eisenjochs (109a) geschweißt
ist;
das obere gebogene Verlängerungsteil des elastischen Verbindungsteils (112) an ein
zweites Ende der Spule (109b) geschweißt ist und das untere Verlängerungsteil des
elastischen Verbindungsteils (112) mit einem elastischen Stecker über ein Verbindungsteil
verbunden ist.
5. Überspannungsschutzvorrichtung mit Kurzschlussschutzfunktion gemäß Anspruch 2, wobei
ein leiterförmig ausgebildetes Gitter auf der Sperrplatte (113) angeordnet ist.
6. Überspannungsschutzvorrichtung mit Kurzschlussschutzfunktion gemäß einem der Ansprüche
1 bis 5, wobei
der bewegliche Kontakt (106) aus einem Silber-Wolfram-Legierungsmaterial besteht;
und der statische Kontakt (107) aus einem Silber-Wolframcarbid-Legierungsmaterial
besteht.
7. Überspannungsschutzvorrichtung mit Kurzschlussschutzfunktion gemäß einem der Ansprüche
1 bis 6, wobei der Blitzschlagschalter (108) eine keramische Gasentladungsröhre mit
einer nominalen DC-Durchbruchsspannung von mehr als 250V ist.
8. Überspannungsschutzvorrichtung mit Kurzschlussschutzfunktion gemäß einem der Ansprüche
1 bis 7, wobei das Kurzschlussschutzmodul (101) des Weiteren einen Griff (110), einen
Betätigungsmechanismus (111), eine Blockplatte (114) und eine optional eingebaute
Fernalarmeinrichtung (104) umfasst.
9. Überspannungsschutzvorrichtung mit Kurzschlussschutzfunktion gemäß einem der Ansprüche
1 bis 8, wobei das Überspannungsschutzmodul (102) eine erste Steckplatte (122) und
eine zweite Steckplatte (123) aufweist, wobei die erste Steckplatte (122) und die
zweite Steckplatte (123) mit dem ersten elastischen Stecker (117) bzw. dem zweiten
elastischen Stecker (118) in Steckverbindung stehen.
10. Überspannungsschutzvorrichtung mit Kurzschlussschutzfunktion gemäß einem der Ansprüche
1 bis 9, wobei
eine Breite des Überspannungsschutzmoduls (102) 9 mm oder 18 mm beträgt;
das Überspannungsschutzmodul (102) konvexe Kanten mit unterschiedlichen Höhen an den
beiden Seiten aufweist, und das Kurzschlussschutzmodul (101) Nuten mit entsprechenden
Höhen an den entsprechenden Oberflächen aufweist.
1. Dispositif de protection contre les surtensions (100) avec une fonction de protection
contre les courts-circuits, comprenant :
un module de protection contre les surtensions (102) déchargeant et supprimant un
courant et une tension de surtension, le module de protection contre les surtensions
étant un module de type enfichable ;
un module de protection contre les courants de court-circuit (101) intégré dans un
socle et assurant la protection contre les courts-circuits et le montage enfichable
du module de protection contre les surtensions,
dans lequel
le module de protection contre les courants de court-circuit (10) comprend :
un contact mobile (106) et un contact statique (107), le contact statique comprenant
un support (107a) ;
un mécanisme électromagnétique (109) comprenant une culasse en fer (109a) et une bobine
(109b) ;
et un commutateur sensible à la foudre (108) connecté au contact statique (107) et
une pièce de connexion élastique (112), le commutateur sensible à la foudre (108)
étant connecté en parallèle avec la bobine (109b) et une première extrémité du commutateur
sensible à la foudre (108) étant connectée au support (107a) du contact statique,
caractérisé en ce que le support (107a) est un support statique en forme de U et la direction d'un courant
circulant à travers le contact statique est cohérente avec la direction d'un courant
circulant à travers le contact mobile, et en ce que la bobine (109b) comprend une résistance ayant un coefficient de température positif.
2. Dispositif de protection contre les surtensions (100) avec une fonction de protection
contre les courts-circuits selon la revendication 1, dans lequel le module de protection
contre les courts-circuits (101) comprend en outre :
une base (103) et un couvercle (105), le couvercle recouvrant la base pour former
un logement du socle ;
une pièce de connexion élastique (112) comprenant une borne élastique, une partie
d'extension supérieure incurvée et une partie d'extension inférieure ;
un déflecteur (113) monté sur la base (103), le déflecteur et la base formant une
chambre d'extinction d'arc auto-extinguible (120) ;
une première borne de connexion (115) connectée à une ligne de phase externe ;
une seconde borne de connexion (116) connectée à une ligne de phase externe ou à une
ligne de terre ;
une première fiche élastique (117) et une seconde fiche élastique (118) pour la connexion
au module de protection contre les surtensions (102), la première fiche élastique
(117) étant connectée à la première borne de connexion (115) et la seconde fiche élastique
(118) étant connectée à la seconde borne de connexion (116).
3. Dispositif de protection contre les surtensions avec une fonction de protection contre
les courts-circuits selon la revendication 1 ou 2, dans lequel
la résistance est une résistance à haute résistance avec une résistance supérieure
à 500 mQ.
4. Dispositif de protection contre les surtensions avec une fonction de protection contre
les courts-circuits selon la revendication 3, dans lequel
la seconde extrémité du commutateur sensible à la foudre (108) est reliée à une borne
élastique de la pièce de connexion élastique (112), la pièce de connexion élastique
fournit une force élastique pour appuyer sur le commutateur sensible à la foudre ;
une partie d'extension supérieure du support (107a) du contact statique est soudée
à une première extrémité de la bobine (109b) au niveau d'une partie d'extension de
la culasse en fer (109a) ;
la partie d'extension supérieure incurvée de la pièce de connexion élastique (112)
est soudée à une seconde extrémité de la bobine (109b), la partie d'extension inférieure
de la pièce de connexion élastique (112) est reliée à une première fiche élastique
par l'intermédiaire d'une pièce de connexion.
5. Dispositif de protection contre les surtensions avec une fonction de protection contre
les courts-circuits selon la revendication 2, dans lequel une grille en forme d'échelle
est disposée sur le déflecteur (113).
6. Dispositif de protection contre les surtensions avec une fonction de protection contre
les courts-circuits selon l'une quelconque des revendications 1 à 5, dans lequel
le contact mobile (106) est fait d'un matériau en alliage d'argent et de tungstène
;
le contact statique (107) est en alliage de carbure de tungstène et d'argent.
7. Dispositif de protection contre les surtensions avec une fonction de protection contre
les courts-circuits selon l'une quelconque des revendications 1 à 6, dans lequel
le commutateur sensible à la foudre (108) est un tube à décharge de gaz en céramique
avec une tension de claquage nominale en courant continu supérieure à 250 V.
8. Dispositif de protection contre les surtensions avec une fonction de protection contre
les courts-circuits selon l'une quelconque des revendications 1 à 7, dans lequel le
module de protection contre les courants de court-circuit (101) comprend en outre
une poignée (110), un mécanisme de fonctionnement (111), une plaque de bloc (114)
et un dispositif d'alarme à distance (104) qui est installé en option.
9. Dispositif de protection contre les surtensions avec une fonction de protection contre
les courts-circuits selon l'une quelconque des revendications 1 à 8, dans lequel le
module de protection contre les surtensions (102) comprend une première plaque de
fiche (122) et une seconde plaque de fiche (123), la première plaque de fiche (122)
et la seconde plaque de fiche (123) recevant la première fiche élastique (117) et
la seconde fiche élastique (118).
10. Dispositif de protection contre les surtensions avec une fonction de protection contre
les courts-circuits selon l'une quelconque des revendications 1 à 9, dans lequel
une largeur du module de protection contre les surtensions (102) est de 9 mm ou 18
mm ;
le module de protection contre les surtensions (102) présente des bords convexes de
hauteurs différentes sur les deux côtés, le module de protection contre les courants
de court-circuit (101) présente des rainures de hauteurs correspondantes sur des surfaces
correspondantes.