CN2252429Y - Lightning arrester separator - Google Patents

Abstract

The utility model relates to a lightning arrester, particularly a lightning arrester separator. The utility model comprises an energy element 1 and a casing 2, wherein, the energy element 1 comprises a kind of explosive which can be exploded by a short circuiting arc of the lightning arrester, the explosive is sealed in an inner cavity of the casing 2, and the casing 2 is provided with a weak section 21 which can generate an outside display effect under the explosive effect of the energy element. The utility model has the advantages that a fault arrester can be outside displayed, and the destructive outside display effect is extremely striking. The utility model also has the advantages of reliable action, simple structure, and easy manufacture.

Description

The lightning arrester disconnector

The utility model relates to a kind of lightning arrester, particularly a kind of lightning arrester disconnector.

In the prior art; do not see and adopt the lightning arrester disconnector; like this, in the practical work process, because the fault lightning arrester does not have the outer effect of showing; and can't judge that normally whether lightning arrester; so need regularly whole lightning arresters to be removed test, not only bring very big inconvenience to work, and the fault lightning arrester that can not in time change; since no longer possess lightning-arrest effect, like this may be to the great adverse consequences of protection deposits yields.

The purpose of this utility model is to overcome weak point of the prior art, and a kind of fault lightning arrester that can show outward is provided, and the reliable operation structure is simpler, lightning arrester disconnector easy to use.

The purpose of this utility model realizes by following approach.

The lightning arrester disconnector, its structural feature is: it includes energy element and shell energy element and comprises a kind of explosive that can be ignited by the lightning arrester short circuiting arc, it is enclosed in the shell inner cavity, and shell has the weak link of showing effect under energy element detonation outside the generation.

When lightning arrester produces fault, can produce the short circuiting arc that causes owing to short circuit current, utilize this short circuiting arc as ignition source with the ignition energy element, thereby disconnector is in time moved, energy element after the blast explodes the weak link on the shell to be worn, thereby produces the destructive outer effect of showing.

The purpose of this utility model can also realize by following approach.

The arrester ground line passes the energy element and is electrically connected with it.

During the lightning arrester fault, because the short circuiting arc that caused of short circuit power supply all transmits earthward by earth connection, the energy element is electrically connected with earth connection, this ignition frame mode not only reliably but also easy.

The energy element can be connected in series gap A and be plugged on the arrester ground line after shunt capacitance is in parallel.

Lightning current all is a high-frequency current, when the arrester ground line has high-frequency current, shunt capacitance is channel status, like this, that branch line at the lightning arrester lightning current selection on the ground of guiding in normal operation the passing through less shunt capacitance place of comparative resistance is without that branch line at energy element place; And the short circuit current that causes short circuit is power current, and at this moment, shunt capacitance is off state, and comparative resistance is bigger, thereby makes short circuiting arc puncture gap A with having no option and pass the branch line at energy element place.Certainly, the electrode spacing among the A of gap should be that short circuiting arc that the fault lightning arrester sends can puncture, and this ocean guarantees that disconnector can in time respond the fault of lightning arrester and works.

The energy element preferably with form three branch with shunt capacitance and gap B again after gap A be connected in series and also network and be plugged on the arrester ground line, wherein, the electrode spacing among the A of gap is greater than the electrode spacing among the B of gap.

The power current of arrester ground line transmission differs, and to establish a capital be the short circuit current of lightning arrester fault.Because the branch line at the branch line phase resistance relative gap A place at B place, gap is little, like this, the power current by the earth connection transmission under the lightning arrester normal operation, its big flows away for the branch line branch at B place, gap.

Allow the electric current except that the short circuit current that the fault lightning arrester takes place pass through the energy element as few as possible, touch work to avoid disconnector.

In sum, the utility model has following advantage compared to existing technology: not only can show the fault lightning arrester outward, and show that effect is extremely eye-catching outside destructive; At short big electric current of duration, the little electric current of long duration, effect such as repeated loading all can guarantee be failure to actuate (experimental data and conclusion see Table 1～2) down.But can represent again that in table 3 ampere-second holding property test data table its action is sensitive at the right time, so its action is extremely reliable.It is simpler that while the utility model also has structure, makes advantages such as more convenient.

The test parameters and the test data of the short duration test of the big electric current of table 1

The examination Article Number	Impulse current	Duration	The test product situation
				No.1	100.3KA	4/10μs	Not action
104.0KA	Not action

The test parameters and the test data of the little electric current long duration test of table 2

The examination Article Number	The impulse current value	Duration	Test number (TN)	The test product situation
					No.2	254～280A 266～314A 261～294A	The 2ms square wave	1～6 7～12 13～18	Do not move not flashover
60 ± 3 ℃ of 4h of preheating	271A	19～20

Table 3 ampere-second characteristic test tables of data

Sequence of tests	Numbering	Test voltage (KV)	Desired action current (A)	Operate time (ms)	Remarks
							95100401	11.3	28.9	449	Normally
	95100402	11.3	28.9	448	Normally

	95100403	11.3	28.9	547	Normally
							95100404	11.2	28.9	459	Normally
	95100405	11.3	28.9	527	Normally
							95100406	11.3	82.2	309	Normally
	95100501	11.3	82.2	322	Normally
							95100502	11.3	82.2	423	Normally
	95100503	11.3	82.2	250	Normally
							95100504	11.0	82.2	471	Normally
	95100506	11.2	213	310	Normally
							95100507	11.3	213	243	Normally
	95100508	11.0	213	315	Normally
							95100509	11.3	213	301	Normally
	951005010	11.3	213	246	Normally
							951005011	11.2	818	101	Normally
	95100601	11.0	818	75	Normally
							95100602	11.3	818	78	Normally
	95100603	11.3	818	84	Normally
							95100604	11.3	818	94	Normally

Accompanying drawing 1 is a lightning arrester disconnector structural representation

Accompanying drawing 2 is lightning arrester disconnector electrical connection graphs

Below we carry out more detailed description to the utility model in conjunction with the accompanying drawings.

Most preferred embodiment:

With reference to accompanying drawing 2, energy element 1 and gap A5 are concatenated into a branch line, form three branch and networking with the branch line at B7 place, gap and the branch line at shunt capacitance 6 places again, and this and networking are plugged on lightning arrester 3 earth connections.

With reference to accompanying drawing 1, the lightning arrester disconnector, the sealing plate of lightning arrester 3 insulators 32 bottoms is made of metal, and as the earth terminal 33 of lightning arrester 3, the arc top contacts with earth terminal 33 on the lid shape spring 8, at the bottom of the following arc then be bearing in porcelain tube 9 on electrode B 71 contact, porcelain tube 9 is inserted in the cavity of special type screw 10 upper ends of being made by metal material, but expose porcelain tube 9 upper ends, expose the electrode spacing that highly can form among the B of gap, because the upper surface of electrode B 71 and special type screw 10 is two electrodes among the B7 of gap; Energy element 1 includes explosive, containing the back plug by metal material is contained in the inner chamber of porcelain tube 9, energy element 1 upper end contacts with electrode B 71 to form and is electrically connected, energy element 1 lower end is bearing on the step in porcelain tube 9 inner chambers, this shoulder height is the electrode spacing among the A of gap, and this shoulder height is greater than the height that exposes of porcelain tube 9 upper ends, but this shoulder height can puncture for the short circuiting arc that the fault lightning arrester sends again.Two lead-in wires of shunt capacitance 6 are followed closely 10 affixed and form and to be electrically connected with electrode B 71 and special type screw respectively.Shell 2 is made by bakelite, both ends open, and its top is affixed by fastener 11 and insulator 32 tail ends; Special type screw 10 is bearing on the boss at shell 2 middle parts by its upper end step, and under the effect of lid shape spring 8, forces special type screw 10 and shell 2 affixed.Be enclosed in the inner chamber of shell 2 to guarantee energy element 1 by the sealing ring between the sealing ring between shell 2 and the earth terminal 33 and special type screw 10 upper end step and the shell 2 middle part boss.Has cavity 4 between energy element 1 and the shell 2.Weak link 21 power relative thin wall constructions.

It is same as the prior art that present embodiment is not stated part.

Claims (7)

1, lightning arrester disconnector, it is characterized in that, it includes energy element (1) and shell (2), energy element (1) comprises a kind of explosive that can be ignited by lightning arrester (3) short circuiting arc, it is enclosed in shell (2) inner chamber, and shell (2) has the weak link (21) of showing effect under energy element (1) detonation outside the generation.

2, lightning arrester disconnector according to claim 1 is characterized in that, weak link (21) or be made up of relatively low material in shell (2) material of main part intensity.Or form by the relative thin wall construction layer on the shell (2).

3, lightning arrester disconnector according to claim 1 is characterized in that, has cavity (4) between energy element (1) and the weak link (21).

4, lightning arrester disconnector according to claim 1 is characterized in that, the lightning arrester disconnector is fixed in lightning arrester (3) insulator (32) bottom.

5, lightning arrester disconnector according to claim 1 is characterized in that, lightning arrester (3) earth connection passes energy element (1) and is electrically connected with it.

6, lightning arrester disconnector according to claim 1 is characterized in that, energy element (1) serial connection gap A (5) and be plugged on lightning arrester (3) earth connection after shunt capacitance (6) is in parallel.

7, lightning-arrest disconnector according to claim 1, it is characterized in that, energy element (1) with form three branch and networking with shunt capacitance (6) and gap B (7) again after gap A (5) is connected in series and be plugged on lightning arrester (3) earth connection, the electrode spacing among its intermediate gap A (5) is greater than the electrode spacing among the gap B (7).

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