CN203661375U - Illumination equipment employing remote intrinsic safe control technology - Google Patents

Illumination equipment employing remote intrinsic safe control technology Download PDF

Info

Publication number
CN203661375U
CN203661375U CN201320892115.7U CN201320892115U CN203661375U CN 203661375 U CN203661375 U CN 203661375U CN 201320892115 U CN201320892115 U CN 201320892115U CN 203661375 U CN203661375 U CN 203661375U
Authority
CN
China
Prior art keywords
control
intrinsic safety
circuit
transformer
relay
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.)
Expired - Lifetime
Application number
CN201320892115.7U
Other languages
Chinese (zh)
Inventor
李放
余子先
孔德全
刘保伦
倪瑞
宋晓春
华莉
齐晶晶
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.)
HUAINAN WANTAI ELECTRONICS CO Ltd
Original Assignee
HUAINAN WANTAI ELECTRONICS CO Ltd
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 HUAINAN WANTAI ELECTRONICS CO Ltd filed Critical HUAINAN WANTAI ELECTRONICS CO Ltd
Priority to CN201320892115.7U priority Critical patent/CN203661375U/en
Application granted granted Critical
Publication of CN203661375U publication Critical patent/CN203661375U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40Control techniques providing energy savings, e.g. smart controller or presence detection

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The utility model discloses illumination equipment employing the remote intrinsic safe control technology. The illumination equipment comprises an intrinsic safe control circuit and the illumination equipment, wherein the intrinsic safe control circuit comprises an intrinsic safe pilot control circuit formed by an intrinsic safe transformer, an intrinsic safe control circuit relay, an equipment control relay and a clamping diode, and an illumination control circuit. The illumination equipment can realize a remote intrinsic safe control function and satisfies use demands, moreover, the intrinsic safe remote control circuit is employed to solve a problem of hidden safety trouble existing in a common remote control circuit, and a problem of automatic equipment start caused when a remote control button is in a closing/opening process, a remote control cable is cut down to be in short circuit and the cable is cut down to be in short circuit is solved. The illumination equipment is advantaged in that the short circuit current in the intrinsic safe circuit is small, automatic equipment start caused when the remote control cable is cut down to be in short circuit can be further avoided, and mine safety accidents are greatly reduced.

Description

Adopt the lighting apparatus of distant place intrinsic safety control technology
Technical field
The utility model belongs to mining lighting apparatus field, particularly a kind of lighting apparatus that adopts distant place intrinsic safety control technology.
Background technology
At present, the control mode that mining illumination integral equipment adopts, for controlling on the spot, connects lighting apparatus by mining lighting apparatus comprehensive protector, and the start/stop button control lighting apparatus on the flame proof cavity of comprehensive protector stops power transmission.
ZJZ2-4.0 mine lightning comprehensive protector has micro computer monitoring and intelligent protection function; intelligent comprehensive protector is taking 16 single-chip microcomputers of high-performance as core, and by modular hardware designs and software algorithm, antijamming capability is strong; reliable in action, protects sensitive height.There is good human-computer interaction interface, the functions such as Chinese liquid crystal display, menu operation, password authorization, anti-misoperation, query modification, fault memory, also, with asynchronous communication RS485 communication (must the illustrate when goods) interface of standard, can conveniently dock and monitor with other automation equipment.Have and manually control on the spot and power transmission and generally lamp and the free choice for use function of sodium vapor lamp automatically; and can avoid the starting current of sodium vapor lamp; wear terminal protection device and can realize far distance short-circuit defencive function; far distance short-circuit protection; sample of signal does not rely on electric current; also irrelevant with cable length, the scope inner cable length that guard space allows in pressure drop can extend arbitrarily.
This mine lightning comprehensive protector isolating switch HK that closes, main transformer ZB obtains electric, switch BJ closure after intellective protector powers on. in the time that needs manually boot function; press and determine key to enter menu setecting manual; press start button, vacuum contactor coil obtains electric adhesive, and main circuit is connected.In the time of needs autostart function, press and determine that key enters menu setecting automated intelligent controller and obtains electric time delay after 3 seconds, switch S J closure, vacuum contactor KM coil obtains electric adhesive main circuit and connects, its normally opened contact closure, and closure signal is returned after the machine, switch S J disconnects, and startup completes.
In circuit, each ardware model number is as follows:
Figure BDA0000451845700000021
The protective circuit of this device is monitored the voltage condition in three-phase alternating current input line in real time by voltage protector, and cuts off in time being connected between illuminating lamp and three-phase alternating current input line by relay, and illuminating lamp is burned when avoiding over-voltage and over-current.
Publication number is the Chinese patent " mining illuminating lamp protective device " of CN202633899U, the protective circuit of this mine lightning comprehensive protector is disclosed, comprise the three-phase alternating current input line that is connected to unit switch HK, intelligent controller WTZ, on described overvoltage protection device WTZ, be connected to four groups of current transformer LH1, LH2, LH3, LH4, after having access to a dry-type three-phase transformer ZB in described three-phase alternating current input line, pass through respectively the current transformer LH1 on intelligent controller WTZ, LH2, LH3, LH4, and there is wire to draw and be connected with three-phase reactor SK in the three-phase alternating current input line after dry-type three-phase transformer ZB, the rear access intelligent controller of resistance R 2 WTZ, described resistance R 2 one end are by capacitor C 1, capacitor C 2 ground connection respectively that the other end passes through, three-phase alternating current input line after dry-type three-phase transformer ZB wherein also has bypass wire through the current transformer LH1 on intelligent controller WTZ in a phase line, also include control transformer CT, vacuum contactor KM, described vacuum contactor KM, control transformer CT accesses respectively three-phase alternating current input line wherein between two phase lines, the contact KM1-1 of vacuum contactor KM also accesses in the three-phase alternating current input line after dry-type three-phase transformer ZB, vacuum contactor also has on contact KM1-2 access intelligent controller WTZ.This protective circuit is monitored the voltage condition in three-phase alternating current input line in real time by intelligent controller, and cuts off in time being connected between illuminating lamp and three-phase alternating current input line by relay, and illuminating lamp is burned when avoiding over-voltage and over-current.
This type of control mode is because needs operate on the spot near equipment, and command range is limited, and user uses operation inconvenience.And adopt general control control mode far away, its shortcoming is that distant place control button easily produces larger spark in the time of closure and disconnection process and the disconnected short circuit of electric control cable lock far away, and electric control cable far away easily causes the spontaneous starting of lighting apparatus while being broken short circuit by lock, has brought very large hidden danger to Safety of Coal Mine Production.The purpose of this utility model is to design a kind of remote controlled, safe novel illumination equipment.
Utility model content
The purpose of this utility model is to provide a kind of lighting apparatus that adopts distant place intrinsic safety control technology.
For achieving the above object, the utility model provides a kind of lighting apparatus that adopts distant place intrinsic safety control technology, comprise lighting equipment circuit and distant place intrinsic safety control circuit, described lighting equipment circuit access three-phase alternating current input line, comprise vacuum contactor, current transformer, intelligent controller etc., the contact KM1-1-3 of described vacuum contactor controls the break-make of lighting equipment circuit.
Described distant place intrinsic safety control circuit is connected across in the three-phase alternating current input line of KM1-1-3 upper end, contact of vacuum contactor, described distant place intrinsic safety control circuit comprises intrinsic safety leading control circuit, far controls button, and described intrinsic safety leading control circuit comprises intrinsic safety transformer, intrinsic safety control loop relay, equipment control relay;
Electric current is through the described intrinsic safety transformer described intrinsic safety control loop relay of flowing through, described intrinsic safety control loop relay is also connected with described control button far away, described equipment control relay is connected with the contact KM1-1-3 of the vacuum contactor of described lighting equipment circuit, described intrinsic safety control loop relay determines its operating state by described control button control far away, and described equipment control relay determines its operating state by intrinsic safety control loop relay.
Described distant place intrinsic safety control circuit also comprises illumination control circuit, comprises control transformer, and described control transformer access three-phase alternating current input line, between two phase lines, is wherein the described intrinsic safety transformer-supplied of described intrinsic safety leading control circuit;
Described intrinsic safety leading control circuit also comprises current-limiting resistance and some clamp diodes.
The output of the input A3 of described intrinsic safety transformer and input B3 access control transformer, on input B3, be connected with a fuse F1, the output of intrinsic safety transformer is connected with resistance R 2 and capacitor C 1 and is connected to output lead A1, the two ends of capacitor C 1 are parallel with diode D5, diode D6 and equipment control relay, the circuit of input B3 is drawn a circuit after fuse F1, forward is connected with diode D1, Opposite direction connection has diode D4, the positive input terminal of described diode D4 is connected to input A3, the connection of a bit drawing between the reverse input end of the positive input terminal of described diode D1 and described diode D4 has resistance R 1, intrinsic safety control loop relay, diode D3, and be connected to the positive input terminal of described diode D4, the switch of equipment control relay is drawn output lead A8 and output lead B8, described output lead A8 and output lead B8 are connected to the control switch KJ two ends of described vacuum contactor.
Described illumination control circuit also comprises control switch KJ, and the primary coil of control transformer connects power three-phase line, and the secondary coil of control transformer connects intrinsic safety transformer; The exit of the control coil serial connection equipment control relay of control switch KJ; After output lead A1 serial connection control switch BJ, button TA1, be connected in series respectively contact KM1-1, the control switch SJ of button QA, vacuum contactor; After output lead B1 series diode, connect control button far away.
In described lighting equipment circuit, on described overvoltage intelligent controller, be connected to four groups of current transformers (LH1, LH2, LH3, LH4), after having access to a dry-type three-phase transformer in three-phase alternating current input line, pass through respectively the current transformer (LH1, LH2, LH3, LH4) on intelligent controller, and there is wire to draw in the three-phase alternating current input line after described dry-type three-phase transformer, and being connected with three-phase reactor, the rear access intelligent controller of resistance R 2, capacitor C 2 ground connection are respectively passed through by capacitor C 1, the other end in described resistance R 2 one end.
Equipment control relay K1 adhesive after 2 adhesives of intrinsic safety control loop relay K in intrinsic safety control lighting apparatus in a distant place of the present utility model, illumination control circuit is connected, the contact KM1-1-3 adhesive of illumination master control unit vacuum contactor KM, main circuit is connected, and illumination start-up circuit completes.When pressing after control far away stops, equipment control relay K1 and intrinsic safety control loop relay K 2 discharge, and intrinsic safety control circuit disconnects, and illumination master control vacuum contactor KM dead electricity discharges, and lighting apparatus separating brake, cuts off illuminalive power-supply power supply.
The beneficial effects of the utility model: this lighting device can be realized distant place intrinsic safety control function, meet consumers' demand, adopt this Anyuan control circuit to avoid adopting the potential safety hazard of general control function far away simultaneously, the problems such as the equipment spontaneous startup that spark is large and cable is caused by the disconnected short circuit of lock that distant place control button produces in the time of closure and disconnection process and the disconnected short circuit of electric control cable lock far away are solved, its advantage is that intrinsic safety control circuit short circuit current is little, can, because electric control cable far away is caused the spontaneous startup phenomenon of equipment by the disconnected short circuit of lock, not greatly reduce the generation of mine safety accidents simultaneously.
Brief description of the drawings
Fig. 1 is that mine lightning comprehensive protector operation principle of the prior art is as figure;
Fig. 2 is the theory diagram that the utility model adopts the lighting apparatus of distant place intrinsic safety control technology.
Fig. 3 is that the utility model adopts intrinsic safety leading control circuit schematic diagram in the lighting apparatus of distant place intrinsic safety control technology;
Fig. 4 is the circuit diagram that the utility model adopts illumination control circuit in the lighting apparatus of distant place intrinsic safety control technology;
Fig. 5 is the module details figure that the utility model adopts the lighting apparatus of distant place intrinsic safety control technology.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail:
As shown in Figure 2, the utility model embodiment comprises lightning comprehensive protector circuit and distant place intrinsic safety control circuit.Distant place intrinsic safety control circuit comprises intrinsic safety leading control circuit JHK and control button far away., intrinsic safety leading control circuit comprises intrinsic safety transformer T1, intrinsic safety control loop relay K 2, equipment control relay K1.Electric current, through the intrinsic safety transformer T1 current-limiting resistance R2 that flows through, is connected to one end of intrinsic safety control loop relay K 2, and its other end is connected with control button far away, and one end is connected with equipment control relay K1 in addition, and equipment control relay K1 is connected with lighting apparatus.Intrinsic safety control loop relay K 2 determines its operating state by far controlling button control, and the operating state of decision device control relay K1.Therefore, far control button and can pass through the operating state of two relay remote controlled light devices.
As shown in Figure 3, in intrinsic safety leading control circuit, also comprise current-limiting resistance R2, clamp diode D1, D2, D3, D4, D5, D6, and capacitor C 1, resistance R 1, fuse F1.
The output of the input A3 of the primary coil of intrinsic safety transformer T1 and input B3 access control transformer CT1, in one of them input line of intrinsic safety transformer T1, be provided with fuse F1, in two input lines of intrinsic safety transformer T1 primary coil, also have two line conductors to draw, intrinsic safety transformer T1 primary coil draw wire respectively one by one one of corresponding access by diode D1, D2, D3, the input of the diode rectifier bridge that D4 forms, on the coil of an equipment control relay K1 of an output access of diode rectifier bridge, the moving terminals of single-pole double-throw switch (SPDT) of equipment control relay K1 are connected to output lead A8, another determines the single-pole double-throw switch (SPDT) of equipment control relay K1 terminals and is connected to output lead B8, terminals of secondary coil of intrinsic safety transformer T1 are connected to output lead B1, another terminals of secondary coil of intrinsic safety transformer T1 are connected to output lead A1, on output lead A1, have access to resistance R 2, the electric capacity of voltage regulation C1 being connected in series with resistance R 2, and be attempted by respectively the coil of the single-pole double throw intrinsic safety control loop relay K 2 on electric capacity of voltage regulation C1, diode D5, diode D6, another output of diode rectifier bridge accesses the moving terminals of single-pole double-throw switch (SPDT) of single-pole double throw relay K 2 by resistance R 1, the coil of single-pole double throw equipment control relay K1 also the single-pole double-throw switch (SPDT) by wire and intrinsic safety control loop relay K 2 one of them determine terminals and be connected.Output lead A1 is connected remote button with output lead B1.Output lead A8, the B8 of equipment control relay K1 is connected with the control switch KJ of vacuum contactor KM coil.
As shown in Figure 4, distant place intrinsic safety control circuit also comprises illumination control circuit, comprise control transformer CT1, control switch KJ, the primary coil of control transformer CT1 connects power three-phase line, and the secondary coil of control transformer CT1 connects intrinsic safety transformer T1 primary coil; Exit A8, the B8 of the control coil serial connection relay K 1 of control switch KJ; After output lead A1 serial connection control switch BJ, button TA1, be connected in series respectively contact KM1-1, the control switch SJ of button QA, vacuum contactor KM; After output lead B1 series diode, connect control button far away;
Output lead B1 is along sense of current connecting valve BJ, button TA1, K switch, binding post e1 successively from left to right, and is finally connected to control button far away;
K switch is single-pole double-throw switch (SPDT), and one is determined the binding post e1 that terminals connect control button far away, and another binding post connects button QA, and is connected to control button binding post e2 far away; Between the moving terminals of K switch and binding post e2, be also parallel with contact KM1-1 and the switch S J of vacuum contactor KM;
Output lead A1 connecting valve M, switch M is single-pole double-throw switch (SPDT), one determine terminals and is connected and far control button binding post e3, and another determines terminals and be connected with the reverse input end of a diode, and the positive input of described diode is connected with binding post e2.
When button, TA1 presses, and terminal 24 is connected with terminal 3, and intrinsic safety transformer T1, current-limiting resistance R2, intrinsic safety control loop relay K 2 control button far away structure binding post e2 become intrinsic safety control loop.Equipment control relay K1 adhesive after 2 adhesives of intrinsic safety control loop relay K, control switch KJ closure, vacuum contactor KM adhesive, the KM1-1-3 adhesive of its contact, lighting equipment circuit is connected, and illumination start-up circuit completes.In the time pressing control button far away control far away stopped, binding post e2 dead electricity, intrinsic safety control loop disconnects, equipment control relay K1 and intrinsic safety control loop relay K 2 dead electricity discharge, illumination control contactor KM dead electricity discharges, and lighting apparatus separating brake, cuts off illuminalive power-supply power supply.
Illumination control loop comprises the three-phase alternating current input line that is connected to unit switch HK, intelligent controller, on intelligent controller, be connected to four groups of current transformer LH1, LH2, LH3, LH4, after having access to a dry-type three-phase transformer ZB in three-phase alternating current input line, pass through respectively the current transformer LH1 on intelligent controller, LH2, LH3, LH4, and there is wire to draw and be connected with three-phase reactor SK in the three-phase alternating current input line after dry-type three-phase transformer ZB, the rear access intelligent controller of resistance R 2, described resistance R 2 one end are by capacitor C 1, the other end is by capacitor C 2 ground connection respectively.
As shown in Figure 5, the contact KM1-1 of vacuum contactor KM is corresponding with relay K 2, and the structure of button TA1 as shown in the figure, in the time that button TA1 presses, connect with port 3 by port 24, and port 5 disconnects with port one; Otherwise port 24 disconnects with port 3, port 5 is connected with port one.In conjunction with Fig. 1, in the time that button TA1 presses, intrinsic safety transformer T1 voltage through current-limiting resistance R2, binding post e1, far control button and enough become loop, 2 adhesives of intrinsic safety control loop relay K, equipment control relay K1 adhesive, lighting equipment circuit is connected.
Above embodiment is described preferred implementation of the present utility model; not scope of the present utility model is limited; do not departing under the prerequisite of the utility model design spirit; various distortion and improvement that the common engineers and technicians in this area make the technical solution of the utility model, all should fall in the definite protection range of claims of the present utility model.

Claims (4)

1. one kind adopts the lighting apparatus of distant place intrinsic safety control technology, comprise lighting equipment circuit and distant place intrinsic safety control circuit, described lighting equipment circuit access three-phase alternating current input line, comprise vacuum contactor (KM), current transformer, intelligent controller etc., the contact KM1-1-3 of described vacuum contactor (KM) controls the break-make of lighting equipment circuit, it is characterized in that
Described distant place intrinsic safety control circuit is connected across in the three-phase alternating current input line of KM1-1-3 upper end, contact of vacuum contactor (KM);
Described distant place intrinsic safety control circuit comprises intrinsic safety leading control circuit, far controls button;
Described intrinsic safety leading control circuit comprises intrinsic safety transformer (T1), intrinsic safety control loop relay (K2), equipment control relay (K1);
Electric current is through described intrinsic safety transformer (T1) the described intrinsic safety control loop relay (K2) of flowing through, described intrinsic safety control loop relay (K2) is also connected with described control button far away, described equipment control relay (K1) is connected with the contact KM1-1-3 of the vacuum contactor (KM) of described lighting equipment circuit, described intrinsic safety control loop relay (K2) determines its operating state by described control button control far away, and described equipment control relay (K1) determines its operating state by intrinsic safety control loop relay (K2).
2. the lighting apparatus of employing according to claim 1 distant place intrinsic safety control technology, is characterized in that,
Described distant place intrinsic safety control circuit also comprises illumination control circuit, comprises control transformer (CT1);
Described control transformer (CT1) access three-phase alternating current input line, between two phase lines, is wherein described intrinsic safety transformer (T1) power supply of described intrinsic safety leading control circuit;
Described intrinsic safety leading control circuit also comprises current-limiting resistance (R2) and some clamp diodes.
3. the lighting apparatus of employing according to claim 2 distant place intrinsic safety control technology, is characterized in that,
The output of the input A3 of described intrinsic safety transformer (T1) and input B3 access control transformer (CT1), on input B3, be connected with a fuse F1, the output of intrinsic safety transformer (T1) is connected with resistance R 2 and capacitor C 1 and is connected to output lead A1, the two ends of capacitor C 1 are parallel with diode D5, diode D6 and equipment control relay (K1), the circuit of input B3 is drawn a circuit after fuse F1, forward is connected with diode D1, Opposite direction connection has diode D4, the positive input terminal of described diode D4 is connected to input A3, the connection of a bit drawing between the reverse input end of the positive input terminal of described diode D1 and described diode D4 has resistance R 1, intrinsic safety control loop relay (K2), diode D3, and be connected to the positive input terminal of described diode D4, the switch of equipment control relay (K1) is drawn output lead A8 and output lead B8, described output lead A8 and output lead B8 are connected to the control switch KJ two ends of described vacuum contactor (KM).
4. the lighting apparatus of employing according to claim 3 distant place intrinsic safety control technology, is characterized in that,
The illumination control circuit of described distant place intrinsic safety control circuit also comprises control switch KJ, and the primary coil of control transformer (CT1) connects power three-phase line, and the secondary coil of control transformer (CT1) connects intrinsic safety transformer (T1) primary coil; Exit A8, the B8 of the control coil serial connection equipment control relay (K1) of control switch KJ; After output lead A1 serial connection control switch BJ, button TA1, be connected in series respectively contact KM1-1, the control switch SJ of button QA, vacuum contactor (KM); After output lead B1 series diode, connect control button far away.
CN201320892115.7U 2013-12-31 2013-12-31 Illumination equipment employing remote intrinsic safe control technology Expired - Lifetime CN203661375U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320892115.7U CN203661375U (en) 2013-12-31 2013-12-31 Illumination equipment employing remote intrinsic safe control technology

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320892115.7U CN203661375U (en) 2013-12-31 2013-12-31 Illumination equipment employing remote intrinsic safe control technology

Publications (1)

Publication Number Publication Date
CN203661375U true CN203661375U (en) 2014-06-18

Family

ID=50927719

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320892115.7U Expired - Lifetime CN203661375U (en) 2013-12-31 2013-12-31 Illumination equipment employing remote intrinsic safe control technology

Country Status (1)

Country Link
CN (1) CN203661375U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103731960A (en) * 2013-12-31 2014-04-16 淮南万泰电子股份有限公司 Lighting equipment adopting remote intrinsic safety control technology
CN105159058A (en) * 2015-07-27 2015-12-16 兖州煤业股份有限公司 Pilot circuit control method, pilot circuit controller and pilot circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103731960A (en) * 2013-12-31 2014-04-16 淮南万泰电子股份有限公司 Lighting equipment adopting remote intrinsic safety control technology
CN105159058A (en) * 2015-07-27 2015-12-16 兖州煤业股份有限公司 Pilot circuit control method, pilot circuit controller and pilot circuit
CN105159058B (en) * 2015-07-27 2019-03-19 兖州煤业股份有限公司 A kind of precursor circuit control method, precursor circuit controller and precursor circuit

Similar Documents

Publication Publication Date Title
CN103488159B (en) A kind of distribution box type smart home terminal and integrated protection controller
CN204190188U (en) Low-voltage intelligent protection distribution box
CN103872658A (en) Multifunctional self-recovery over-voltage and under-voltage protector
CN203661375U (en) Illumination equipment employing remote intrinsic safe control technology
CN106225250A (en) A kind of control system of electric water heater of tape relay fault feedback function
CN103647280B (en) The method that the intelligent liaison controller that supplies power with double circuit controls electric power system
CN202695269U (en) Intelligent self-energy-fetching vacuum circuit breaker
CN103731960A (en) Lighting equipment adopting remote intrinsic safety control technology
CN102820700B (en) Generator alternating current continuous voyage emergency power supply
CN206452094U (en) A kind of intelligent self-recovery protector of overvoltage/undervoltage
CN211321311U (en) Safety switch with switching function
CN204314645U (en) A kind of low-voltage distribution system by screen break-make automaton
CN208142576U (en) Switchgear Intelligent integrated instrument system
CN211151604U (en) Mining explosion-proof and intrinsically safe dual-power dual-loop lighting control device
CN104037935B (en) A kind of Double Power Switch Controller of band short circuit tripping protection
CN204407871U (en) Circuit breaker is the built-in protection module control circuit of changer controller more
CN204089648U (en) Autotransformer reduced-voltage starting cabinet
CN208420975U (en) Dual power supply switching equipment testing auxiliary device
CN206542181U (en) Intelligent non-pressure release coil controller
CN203119436U (en) Power restoration device controlling reclosure of low-voltage switch in voltage loss
CN208753978U (en) Breaker mechanism closing coil protective device
CN201308737Y (en) Automatic transfer switch with fire-protection reset function
CN103066550B (en) Low voltage switch decompression reclosure control power transmission detection method and device
CN206671934U (en) A kind of second protection circuit of toaster
CN205844398U (en) High-voltage fence false alarm prevention device

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20140618