Electric breakdown phenomenon is varied, for example, same the likelihood has kind of trouble different breakdown phenomenon, not congener breakdown may be same kind of breakdown phenomenon, the oneness of phenomenon of this kind of breakdown and diversity, to searched breakdown to bring complexity.
But, breakdown phenomenon is the basic basis that searchs electric breakdown, it is the start that searchs electric breakdown, want to observe an analysis carefully to breakdown phenomenon consequently, the mainest in finding out breakdown phenomenon, the most typical respect, the time that makes clear breakdown happening, place, environment.
1, direct perception
A little electric breakdown can connect the apparatus such as outstanding hand, eye, nose, ear, use feel, look, hear, listen etc paragraph, the temperature rise with unusual equipment of direct perception breakdown, oscillatory, odour, noise, color changes etc, determine the breakdown position of equipment.
2, the instrument detects
The direct perception that a lot of electric breakdown rely on a person cannot determine position, and want have the aid of all sorts of instruments, appearance, value of the voltage to breakdown equipment, electric current, power, frequency, impedance, insulation, temperature, amplitude, rotate speed has an amount etc, in order to determine breakdown position. For example, through measuring insulation resistance, absorptance, dielectric loss, decide equipment is isolated from whether be affected with damp be affected with damp; Pass dc block measure, the short circuit dot of circuitry of certain long distance, ground connection dot. The article introduced electric breakdown to diagnose encyclopedia of art a pithy formula.
One, the sense organ is diagnosed
1, electric power transformer is unusual the judgement of noise
Run normal transformer, clarity with a buzz rings equably. Match crack noise to have unusual, judgement breakdown chooses an account. Buzz big tone is tall, overload or it is overvoltage.
Intermittent and violent cackle, single-phase load is added quickly. Bite dingdong strikes tone when hammer, the screw that wear a heart already became loose. Bang of Pi Pi bang pats applause, core ground wire leaves.
Intermittence gives out Chi Chi sound, core ground connection is bad disease. Winding short circuit is slighter, give out blast a crackle. Winding short circuit is more serious, give out tremendous and plangent sound.
High-pressured bushing has crack, give out high frequency fizz. High-pressured down-lead carapace shows subsidiary channels in the human body through which vital energy, blast of bang of Pi Pi bang cracks sound. Low-pressure look line has ground contact, old far hear bang fulminant.
Decline switch divides contact, contact noise of undesirable Zhi Zhi.
2, detect with transistor radio electric equipment partial discharge
Perambulatory change distribution facilities, partial discharge difficult discovery. Carry pocket radio, tone arrives without broadcasting station. Volume leaves to hear sound greatly, even buzz is normal.
If noise is irregular, clip has reputation of very noisy firecracker, or have very noisy squeak, there is partial discharge around. Next volume closes a little bit small, stand by equipment to chase a stage to measure.
Answer hear firecracker voice again, the equipment that be measured has trouble, this equipment partial discharge, emit high frequency electromagnetic wave.
3, apply listen to phonic club to diagnose electromotor common breakdown
Apply listen to phonic marvellous fact, decide electromotor breakdown. Hear continuously Ca Ca sound, rotor and stator are touched brush. Rotate speed slows buzz, coil touchs housing posture ground contact.
Rotate speed slows throat utter a word, coil breaks a line to be short of one photograph. Catcall breaths out slowly in bearing room, bearing lube dries up. Bearing place cackle, conclude bearing already damaged.
4, body of lever of examination wood pole is hollow with knock law
Pole of perambulatory examination wood, lever body all around hammer knock. Should become ringing reputation is good, body of Dong Dong noise is hollow.
5, pare with the root head insulation lead examines state of insulation of generation set bearing
When generation set moves, bearing insulation examines opportunely. Pare with the root the head is isolated from line, lead directly first ground connection, other end is touched touch runner shaft coming back, for many times kiss young scrutiny.
Generation scintilla insulation is poor, insulation is good without scintilla.
6, neutral site not the judgement of breakdown of single-phase ground connection in ground connection system
Three-phase voltage who is the biggest, next photographs have trouble certainly.
7, capacitor of perambulatory examination electric power
Perambulatory examination capacitor, oily temperature rise of leakage bosomy abdomen exceeds. Cluck cluck noise is abnormal, interior has discharge trouble.
8, with the stand or fall that charges discharge law to judge small-sized capacitor
Small-sized capacitor stand or fall, fill discharge law thick judgement. Capacitance two termination power source, charge about one minute. With wire of copper of exterminatory predestined relationship, short receive capacitance two electrode.
Scintilla is ablaze it is good, already damaged without scintilla.
9, identify plumbic accumulator polarity
Plumbic accumulator is polar quality, losing earmark to look not clear. Terminal color will distinguish, negative pole blueness is grey deep palm. Terminal is distinguished locally, sign relying on a factory is extremely decorous.
Terminal diameter is not identical, positive electrode is thicker negative pole is fine. Break off saw blade delimits terminal, qualitative harder for positive electrode. Terminal down-lead inserts yam, line week becomes green is positive electrode.
Join terminal two lead, immerge is rare vitriolic solution, generation bleb carries negative pole, extremely decorous without bleb.
10, the law that blow fire examines cell of accumulator simple case whether short circuit
Accumulator interior short circuit, happen in 9 case more. Short circuit of simple case batteries is denied, commonly used examination of the law that blow fire. With the root relatively blister copper lead, accept the order case batteries one extremely,
The hand takes copper cash other one aspect of the matter, brush quickly delimit another extremely. Lubricious scintilla of occurrence La Bai, be belonged to by check simple case good. Gules scintilla is to lack report, without scintilla already short circuit.
11, the law checks the phase voltage in smoking electric energy of two component three-phase expresses wiring
3 lines electric energy expresses three-phase, the phase voltage in smoking is checked. Changeless circumstance issues negative charge, the phase voltage in disconnecting line.
Watch electric energy to express movement, disc is turning slow half, exclusive validity wiring, otherwise wiring has a mistake.
12, whether does fist of planted agent of judgement microamper watch break a string
Microamper expresses coil to be connected, avometer cannot be measured sentence. Column of the wiring after microamper is expressed, verdigris lead is short had received, next jolty microamper watch, see the hand that express a head at the same time.
Slow swing scope is little, the coil inside the watch is in good condition. Swing more quickly substantially, the coil inside the watch already broke a string.
13, will analyse judgement breakdown according to state of frit silk fusing
Treat condition of frit silk fusing, judge the breakdown inside circuit. Appear frit silk Quan Rong explodes, serious overload or short circuit. Frit silk is mid fracture surface is small, normal overload time is long.
Break near crimp bolt, installation is injured not impaction.
14, according to lubricious annulus the mark identifies resistor size
Finished product is small-sized resistor, lubricious annulus is nominal resistance. The first annulus decides lubricious annulus, stand by resistor brim annulus. Most one annulus is end deviation, reciprocal 2 annulus are multiple.
Block of the others lubricious annulus is worth annulus, state block is worth significance. Color patch color represents number, times several square values of 10. La Zi of olivine of palm blood orange, just a little thirty-four thousand five hundred and sixty-seven,
Grey 89 Bai Hei is 0, jin Yiyin 2 negative multiple.
15, line of insulation of inferior aluminium core identifies a way
Line of plastic insulation aluminous core, see the skin that feel core know actor of low quality. Silvery white of core line softness, inferior harder look sends black.
Cortical scenery is gorgeous imprint factory name, inferior stale does not have a label. Cortical core line contact is close, inferior a big core small pine.
16, the stand or fall that differentiates incandescent lamp bulb
Stand or fall of incandescent lamp bulb, soon fingerprint will differentiate. Bubble circle is bright and clean without sand holes, commodity label lettering is clear. Vitreous lampwick is not askew, filar hook tungsten filament is arranged all.
Lamp holder is installed not askew, a bit tug does not feel loose.
17, the quality that differentiates transformer oil
Transformer is watched outside oil, new oil normally flaxen. Shallow red is shown after moving, oleaginous ageing color pales, intensity is different color is different, char is serious color is nigrescent.
Test tube fills oil to greet light to look, good oil is transparent have fluorescence. Do not have blue purple to glance, diaphaneity difference has a foreign body. Good transformer oily insipidity, or have taste of a bit kerosene.
Dry overheat anxious stink, serious ageing has tart flavor. The generation inside oil crosses electric arc, can smell acetylene flavour.
18, drop water detects electromotor temperature rise
Water of drop of electric machinery temperature rise is measured, a few water are sprinkled on housing. Risk steam not to have sound only, the electric machinery that be measured does not have overheat. The whistle when risking steam whistles noisy,
19, before three-phase electromotor did not install rotor, decide the simple method that change direction
Electromotor changes direction forecast, rotor was not installed decide law. Cupreous silk curves bucket form, stator internal diameter decides bucket way. Stator vertical stroke is put had secured, cotton thread well-bucket is put among them.
The bucket stops firm hind twinkling electrify, the bucket rotates to change direction surely namely.
20, intensity of electromotor insulation machinery standard of 4 class differentiate
Bad of electromotor insulation actor, mechanical intensity will measure. The sense organ diagnoses finger to press, law of differentiate of 4 grade level. Finger is pressed pressure flawless, insulation qualification feel is good.
Produce small crackle on time, insulation is in weak condition. Happen to be out of shape greatly on time, insulation is bad already stop to use.
21, feel lukewarm law detects electromotor temperature rise
Electromotor runs temperature, feel lukewarm law will detect. Hand thrum tries not to become aware very hot, the back of hand is smooth put housing. Touch for a long time the hand is erubescent, 50 degrees or so a bit hot.
The hand can keep two 3 seconds, 65 degrees are very hot. After the hand touchs, iron very, 75 degrees are amounted to extremely hot. It is difficult that the hand just touched bear, 85 degrees already overheat.
22, fuse frit provides fingerprint low pressure insulation place temperature fast fusing of the photograph that where to sentence
Low-pressure distribution screen dish go up, arrange many fuse. Fingerprint frit runs insulation department, frit of very hot hand is in charge of fuse-element to break.
23, the drop of discontinuous core breakdown that the hand helps electrical wiring law search flexible cord
Odd core oak covers soft electrical wiring, discontinuous core searchs a law in. Both hands holds a line cortical, removed more than 200 millimeter. Pull outside forcibly at the same time, chase paragraph of examination to look carefully.
Abrupt attenuate handles line way, it is spot of the trouble that break core.
2, the instrument is diagnosed, check electrography
1, when using low-pressure test pencil hold a way correctly
Commonly used and low-pressure test pencil, master a test two hold a way. The test pencil of pen type, the palm is touched press metallic clip. Thumb index finger reachs middle finger, hold electrography lever mid.
The test pencil of type of authentic coming back, forefinger presses end metal cap. Ring finger of thumb middle finger, hold close plastic lever mid. Mouth of neon tube fenestella is in a poor light, face towards oneself observe.
2, when using low-pressure test pencil should know to should be met item
Use low-pressure test pencil, should know to should be met have 8. Take ball-pen test pencil, hold the move that grasp lever aglet. Assemble inside fine check electrography, resistor must be after neon tube.
Measure check resistance regularly, must be more than trillion Europe. The test pencil of type of authentic coming back, authentic lever is covered on insulation canal. There is electric part to forecast before using, inspectability can be good.
Test operation wants accurate, beware nib touchs crewel. Insulation fills up report of the test on the stage, human body part needs ground connection. Bright light lays a test, neon tube glow is unsharpness.
3, it is inphase that test pencil measures any two lead in sentencing alternating current road still be surprise appearance
Measure sentence two lines identical different, two tactics holds one electrography each, bipod and ground photograph are isolated from, two hit a wire each, two watch a pen, do not shine in phase for different.
4, alternating current of test pencil distinction and dc
Electrography is measured sentence deliver direct current, communication flows continuously brightly dark. The whole body of communication neon tube is light, dc neon tube is bright at the same time.
5, anode of dc of test pencil distinction and negative pole
Measure sentence dc negative pole, electrography neon tube looks careful. Front is negative pole brightly, back end is positive electrode brightly.
6, test pencil is measured sentence dc system negative pole ground connection
Change system of electric place dc, electric brush stroke in Chinese painting and calligraphy and do not shine. If shine,stand by nib to carry, positive electrode has ground connection trouble. If shine,stand by a hand to hold end, ground connection breakdown is in negative pole.
7, 3 lines make judgement 380/220V three-phase breakdown of connecting ground of sheet of power supply circuitry
Astral form receives law three-phase line, electrography touchs two shine, odd a brightness is weak, soft ground connection of this photograph lead. If disappear almost,shine, breakdown of metallic sex ground connection.
8, furnace of resistor of three-phase of join of judgement star form breaks photograph breakdown
Three-phase electric stove is bit neuterer, bear balance is not electrified. Electric brush stroke in Chinese painting and calligraphy and neon tube are bright, decide breakdown is to break.
9, line of neutral of circuitry of judgement electric lamp opens circuit
Lighting circuit switch closes, not bright electrography measures electric lamp. Line of look line neutral all shines, line of power source neutral breaks a string.
10, detect the stand or fall that high-pressured silicon piles and polarity
Electrography strings together a diode, positive electrode receives line of town report appearance. The hand grasps silicon to pile either to carry, touch press electrography metal clip. If the neon tube inside the pen shines, the hand grasps silicon to pile negative extreme.
The neon tube inside the pen does not shine, the hand grasps silicon to pile positive electrode to carry. The hand grasps silicon to pile upright exchange, measuring measure fine observation instead. Twice neon tube all shines, the short circuit inside high-pressured silicon caboodle.
Twice neon tube does not shine, the open a way inside high-pressured silicon caboodle.
11, use number correctly to show inductive test pencil
Number shows inductive test pencil, grasp a law correctly to measure check way. Forefinger presses pen end top, ring finger of thumb middle finger, hold the upside in plastic lever, big toe give attention to two or morethings presses electrode.
Numerical value shows screen is in a poor light, face towards oneself observe. Big toe is pressed measure check directly, touch the bare conductor that be measured. Measure check by inductive breakpoint, touch take cortical lead.
Distinguish line of look line neutral, search look line to break core point.
12, examine illume of lamp desired result installs a project
After gaffer Cheng complete, commonly used examine lamp desired result. Disconnect all light switch, unplug take valve of look line fuse-element. Picket head leaves on fuse, bond high-power check lamp.
Receive a battery main switch, check lamp in series circuit. Circuit is normal the light is not bright, the lamp shines to have short circuit place surely. Remove trouble again desired result, till circuit does not have short circuit.
Desired result spur track each lamp, close respectively light switch. Light of check of spur track short circuit is bright, light of the breakdown that break a string is not bright. Check lamp gives out faint light, it is normal to be shined by check lamp.
Black out desired result the 2nd, be the same as law school with manage each lamp.
13, examine lamp desired result is single-phase socket
Single-phase 202 electrical outlet, often divide Kong Hesan aperture. Two Kong Zunzhong is right for, left in the ground is on right photograph.
Single-phase 202 electrical outlet, bond examines lamp desired result. Left in lamp of right conterminous produce the expected result, it is normal that the lamp shines correct. Light of open circuit breakdown is not bright, contact undesirable lamp to twinkle.
3 aperture electrical outlet imposes a test, light of the ground on right photograph is bright also, left in go up ground light is not bright, otherwise wiring is incorrect.
14, 100 tile examine single-phase electric energy expresses lamp desired result
Measure school is single-phase electric energy watch, 100 made of baked clay bulb go circuit. Invariable purify thirty thousand and six, second of academic quantum of time.
Time of actual measurement theory is wrong, error 2% good. Real much reason takes a word less little, real little reason takes a word more much.
15, 4 lines electric energy expresses three-phase of examination of doctrine of bulb nucleus look wiring
4 lines electric energy expresses three-phase, wiring check checks look doctrine. Two examine lamp series connection, two derivative lines cross contact: Some component voltage terminal, power supply cord of this phase current.
Lamp bright specification receives wrong line, voltage electric current is not inphase. Wiring is correct the light is not bright, voltage electric current is inphase.
16, examine the lamp detects line of look of watch of single-phase electric energy and neuter line are conversed
Homebred and single-phase electric energy is expressed, enter wiring of a type. Check lamp two derivative lines, a thrum first ground connection, other head touchs watch terminal, right is mixed into the line a line.
Wiring is correct the light is not bright, the lamp appears on 0 lines reverse.
17, examine the lamp detects the stand or fall of solar tube
The stand or fall of solar tube, examine the lamp examines decide. Tube carries a foot to string together check lamp, bond 202 power source. Lamp bright tube glow, end of the tube that be measured is still good.
Tube manages end without glow, filament electron disappear is extinct. Touch repeatedly wait not to shine, filament tubal end already opened circuit.
18, examine the lamp detects the ballast stand or fall of fluorescent lamp
Fluorescent lamp is shown abnormal, detect ballast stand or fall. Ballast is strung together examine the lamp, bond 202 power source. Light is faint blood orange color, breakdown is not had inside ballast.
Shine to have short circuit normally nearly, do not shine line or sealing off.
19, examine the lamp is measured sentence winding of power source transformer to have circle a short circuit
Winding of power source transformer, circle a short circuit is very difficult sentence. 2 times winding decides negative charge, winding strings together check lamp. Bond 202 power source, circle a short circuit light is brighter.
Filament is small red do not shine, winding does not have short circuit normally.
20, examine the lamp detects the insulation state of low-pressure electromotor
Low-pressure electromotor is isolated from, examine the lamp detects roughly. Control electric machinery contactor, check lamp is crossed hit fluctuation side. Bulb is bright not at all, electromotor insulation is good.
Filament is small red light attaint, brightness is normal and serious bad.
21, examine the lamp detects electromotor power source breaks low-pressure three-phase to move
Photograph of dynamoelectric act on one's own judgment in an emergency moves, examine the lamp is chased detect. Receive electrify source contactor, or the underside on fuse. Check lamp is crossed touch the lamp not to shine, photograph of the power source that be measured is normal.
Filament sends dark light aglow, silk of frit of the singeing that touch a head is broken.
22, examine the lamp is monitored enclosed three-phase electric heat implement resistor silk burns breakdown
Close three-phase electric heat implement, resistor silk is burned monitor. Astral form receives law neutral to nod, ground connection space receives check light. Three-phase resistor silk is normal, check light is bright not at all.
Filament is aglow and dim bright, silk of one look resistance is burned. It is normal that bulb brightness is amounted to, two-phase resistor silk is burned.
23, examine lamp differentiate is electrostatic with leakage of electricity
Equipment crust electrography is measured, neon tube shines have voltage. Between electrified place earth, bond check light will judge. It is electrostatic that check lamp does not shine, the light is bright not extinguish is leakage of electricity.
3, the instrument is diagnosed, avometer
1, use avometer correctly
Use avometer correctly, the beard before using is familiar with dial. Two null adjuster, come back gently the null that change mix. Choose wiring column correctly, pen of red black list inserts pair of aperture.
Transfer switch comes back batch of archives, archives the choice wants correct. Archives of logical choice span, measure reading ability is accurate. Be certain span graduation mark, hang down inspect exterior reading to allow.
Measure end the pen that dial a watch, switch comes back at high-pressured archives. The batteries inside the watch often is checked, degenerative meeting leakage of electricity solves fluid. With it is good to put appearance environment,
2, the ohmic file that uses avometer correctly
Use ohmic file correctly, should know to should be met have 8. Batteries voltage wants abundant, the circuit that be measured does not have voltage. Choose appropriate fold archives, the needle points to scale feet middle.
Change every time fold archives, resistor of beard readjustments section 0. Nib measures point contact fine, the pen that measure content carries a hand to be not touched. Measure circuit line to be connected, archives of span of 1000 Europe above.
Sentence measure diode component, times is different block is different. Measure transformer winding, if the hand touchs tactility hemp report.
3, the note when avometer measures voltage
Measure voltage with avometer, the note has 8. Be clear about size of watch internal resistance, must somebody is guarded. The circuit that be measured expresses paralell connection, electrified cannot change span.
When measuring volts d.c. , make clear circuit negative pole. Measure inductance circuit voltage, the source cannot cut off the power during. Check kilovolt tall voltage, must use line of special watch pen.
Inductive report is pressed to terrestrial electricity, different value differs span big.
4, the method that avometer measures dc electric current
Measure electric current with avometer, switch is dialed to milliampere archives, certain circuitry negative pole, watch plan in series circuit. Choose manier Cheng archives, reduce pair of circuit effects.
5, the end of from beginning to end of winding of stator of electromotor of three-phase of dc law differentiate
Three-phase electromotor winding, law of dc of from beginning to end is judged. Avometer stirs milliampere file, dry cell of direct current source. One photograph winding receives instrument, additional photograph winding touchs batteries.
Electrify instant expresses a needle to turn, becoming a full member instead is extremely head. If do not turn over changeover wiring, winding of more than photograph is sentenced with the law.
6, the end of from beginning to end of winding of stator of electromotor of three-phase of remanence law differentiate
Has run electromotor, law of remanence of from beginning to end is judged. Three-phase winding gives thrum, make the parallel connection after good number. Avometer stirs milliampere file, bond paralell connection is bit more communal.
Turn slowly electric machinery axis, watch appearance needle at the same time. Pressing with a finger does not have bright show off to move, 3 3 end are connected each. Index swings to the left and right sides, 2 one end and one aspect of the matter.
Head of exchange of one photograph winding, reoccupy measures differentiate with the law. Till express a needle not to swing, from beginning to end parts and one aspect of the matter.
7, the end of from beginning to end of winding of stator of electromotor of three-phase of circumfluent law differentiate
Has run electromotor, circumfluent law judges from beginning to end. Three-phase winding gives thrum, each other is strung together receive triangularly. Avometer stirs milliampere file, string in receiving three-phase winding.
Even dish turn electric machinery axis, watch appearance needle at the same time. Index does not swing basically, winding end to end is received. Index swings range is big, head of one photograph winding is conversed.
Two join nod two thrum, it is head end and tail end.
8, measure with avometer sentence three-phase electromotor rotate speed
Three-phase electromotor rotate speed, apply avometer to measure sentence. Open box of electric machinery wiring, demolish wiring column to connect piece. Avometer receives milliampere grade, bond holds the post of one photograph winding.
Dish turn rotor turns a week, watch pressing with a finger to be placed a few times. 2 extremely electric machinery is placed, synchronous rotate speed 3000 whole. 4 extremely electric machinery is placed twice, synchronous rotate speed 1005.
Sentence rotate speed with this analogize, rotate speed slightly low synchronism fast.
9, detect the ground connection resistor of route of protection of domestic furnish ground connection
Domestic furnish ground wire, check ground connection resistance. Avometer stirs voltage file, kilowatt electric stove is received 0. Measure so that electric stove carries voltage, electric current of cipher out job is worth.
Electric stove changes receive photograph ground wire, measure electric stove to carry voltage again. Carry voltage error twice, except be worth with working electric current. Quotient receives ground resistance, make an appointment with 5% error.
10, the look line that identifies low-pressure alternating current source and neuter line
4 lines make low-pressure three-phase, line of neutral of line of power source look. Avometer stirs voltage file, span communicates a stupid person, brushstroke joins ground connection is nodded, additional brush stroke in Chinese painting and calligraphy reachs power supply cord
Radian of deflexion of pressing with a finger is big, those who express brush stroke in Chinese painting and calligraphy is look line. Watch needle does not move summary deflexion, express brush stroke in Chinese painting and calligraphy and neuter line.
11, measure sentence crystal diode polarity and stand or fall
Measure sentence diode polarity, avometer stirs 1000 Europe file. Measure block value is smally 1000 Europe, diode to resistor. Black pen contact is in charge of positive electrode, red pen contact is in charge of negative pole.
Measure so that block is worth several Europe, diode is retrorse resistor. Red brush stroke in Chinese painting and calligraphy take-overs positive electrode, black brush stroke in Chinese painting and calligraphy take-overs negative pole.
Judge diode stand or fall, avometer stirs 1000 Europe file. Value of block of positive and negative differs big, numerical value is jumped over greatly more had better. Value of block of positive and negative is more adjacent, the pipe that be measured already invalidation.
Value of block of positive and negative all is 0, pipe is polar a short circuit. Block of positive and negative is worth infinity, pipe is in-house already open circuit.
12, detect the stand or fall that high-pressured silicon piles
Check the stand or fall that silicon piles, avometer stirs voltage file. Silicon piles avometer series connection, bond communication 202. Span banishs a stupid person continuously, pile silicon to receive.
Be more than qualification of 30 bend over, watch needle is not moved have trouble. Span communicates a stupid person, reading 202 short circuit. Watch needle does not move reading 0, silicon piles interior already open circuit.
13, measure sentence capacitor stand or fall
Capacitor of small way capacity, measure sentence stand or fall very handy. Avometer stirs 1000 Europe file, pen of red black list is received polar. The left and right sides that express a needle is placed, extent is jumped over greatly more good.
Watch needle swings far from, open circuit inside the capacitance that be measured. Watch needle arrives 0 do not return, the capacitance that be measured already puncture.
14, digital avometer buzzer is blocked detect electroanalysis capacitor quality
Electroanalysis capacitor quality, digital avometer detects. Switch dials buzzer, red black brush stroke in Chinese painting and calligraphy negative pole. Song of a short bee, sound stops spill over the symbol is shown.
Buzzer noisy time is long, capacitor size is larger. If buzzer is noisy all the time, short circuit of the capacitor that be measured. If buzzer does not phonate, capacitor interior opens circuit.
15, the safe practice that should abide by when use pincerlike ammeter
Use pincerlike ammeter, safe practice should be written down prison. Check on high-pressured loop, must undertake by two people. The potential of the lead that be measured, do not exceed clamp to express voltage degree.
The operation must wear a glove, stand on insulation desk pad. Electrical body of human body head, maintain enough security to be apart from. Measure low-pressure generatrix to flow, insulation clapboard adds a bag to protect.
Be isolated from undesirable or bare wire, forbidden use clamp watch is measured.
16, use pincerlike ammeter correctly
Apply pincerlike ammeter, model norms is chosen proper. On maximum Cheng thick measure, logical choice span is blocked. In the center of gate buy lead, activity core be identical is good.
After gate covers lead, electrified cannot change span. Volmeter of pincerlike electric current, voltaic voltage is measured respectively. Illume circuitry two lines, unfavorable enter gate at the same time.
Clamp watch checks every time, span is dialed to the biggest block.
17, pincerlike ammeter measures three-phase the skill of 3 lines electric current
Apply pincerlike ammeter, measure three-phase 3 lines electric current. Kirchhoff is led certainly, reach measure one skill. Gate covers a line, this phase current is worth reading.
Gate covers two lines, reading three-phase electric current. Gate covers 3 lines, bear balances reading 0.
18, pincerlike ammeter measures skill of communication small electric current
Apply pincerlike ammeter, measure communication small electric current. Line of insulation of the load that be measured, the circle is circled on gate core. Reading is divided add in order to circle one, get true electric current to be worth.
19, detect furnace of resistor of three-phase of astral form join breaks photograph breakdown
Three-phase resistor furnace is broken, pincerlike ammeter detects. Electric current of two looks line is worth, all be less than rated electric current. Electric current of line of a look 0, silk of this look resistance is burned.
20, search breakdown of ground connection of short circuit of low-pressure distribution circuitry to nod
Low-pressure distribution line is long, short circuit receives a place to be checked hard. Breakdown look line strings together electric stove, sheet accuses switch to receive power source. Apply pincerlike ammeter, circuit is chased paragraph measure electric current.
Have be in without voltaic dividing line, it is dot of short circuit ground connection.
21, detect device of commutate of brilliant brake canal
Brilliant brake runs rectification unit, pincerlike ammeter detects. Clamp covers zincous jumper, view number of the electric current that express a head. Electric current of the directive that express a head 0, the element that be measured did not work.
Three-phase component electric current is worth, it is normal that fundamental balance is belonged to. Electric current is serious lopsided, component moves abhorrent. Communication has trouble partly, rectification transformer is short of.
22, measure sentence an user to cross steal report
Single-phase electric energy expresses the user, metric slant little or do not go. Before electric energy watch is in or hind, pincerlike ammeter detects. Clamp covers line of look line neutral, the directive that express a head is 0.
Line of look line neutral is measured each, voltaic reading difference is big. Decide cross steal report, one ground type steals one look report.
23, the safe practice that when watch of use insulation resistance measures insulation, should abide by
Use insulation resistance is expressed, safe practice wants to abide by. When measuring high-pressured equipment, must undertake by two people. Complete power failure of the equipment that be measured, undertake discharging adequately.
When slotted line road is isolated from, should obtain the other side to allow. Double loop line power cut, prohibit measure when thunder. Measure near electrified equipment, person watch position is chosen proper.
Maintain enough security to be apart from, notice custody is prevented get an electric shock.
24, use insulation resistance list correctly
Use insulation resistance is expressed, voltage grade is chosen proper. Complete power failure of the equipment before measuring, undertake discharging adequately. Wipe up of the equipment that be measured, exterior cleanness does not have bilge.
The position that prevent a watch is chosen proper, be far from electric field and magnetic field. The level is placed do not tilt, open circuit short circuit two experiments. Soft down-lead of dichromatic Chan Xin, it is good that each other does not twine insulation.
Terminal button identifies clear, test wiring is received correct. Crank arranges hour hand joltily, rotate speed amounts to constant to decide gradually. Shake measure time to do not have destiny, stability of pressing with a finger writes down reading.
25, watch of use insulation resistance detects should note
Insulation resistance watch detects, 8 attentions want to remember well. Line button is received during the test, never feel with the hand. The glass that express a head falls dirt, shake measure a process to cannot be brushed.
Measure equipment to be isolated from rightly, ground connection carries button to accept case. Shake large facility of the sex that measure a look, break away from below rated rotate speed. Detect electroanalysis capacitor,
All previous of the equipment that be the same as a stage is measured, had better use express only together. Shake when measuring equipment to be isolated from, note next temperature when measuring. Accident resistor of 100 thousand Europe, more unfavorable make a watch use.
26, string receive diode to prevent the equipment that be measured to express discharge to insulation resistance
Insulation resistance watch carries button, string receive crystal diode. Shake large facility of the sex that measure a look, prevent equipment to put electric current. Eliminate the left and right sides that express a needle to place, ensure reading is certain truly.
Measure end stop shake turn, appearance also won't damage.
27, the method that raises insulation resistance to express upright voltage
Low-pressure insulation resistance is expressed, series connection rises measure insulation. Overlay of level of series connection tension, insulation resistance reading and.
28, the insulation absorptance of electric power transformer
Bad of transformer insulation actor, insulation resistance watch is measured sentence. Normal temperature is controlled 20 degrees, by when measuring, begin plan: Reading looks when 15 seconds, elapse the value is stabilized when the second.
Ratio of two insulation resistance, appellation insulation absorptance. Be more than 1.3 good, be less than 1.3 be affected with damp be affected with damp.
29, measure quickly sentence low-pressure electromotor stand or fall
Low-pressure electromotor stand or fall, open wiring box to detect. Insulation resistance watch shakes measure, insulation is the smallest million Europe value, 35 degrees fiducial 8, every rise 10 degrees to divide with 2.
Every are low 10 degrees are multiplied 2, reading exceeds ability had better. Avometer dials milliampere to block, law of join of form of electric machinery star. Watch pen allows to receive two-phase head, hand dish runner shaft turns slowly.
Apparent left and right sides places watch needle, 3 times the test is the same as as a result. The electric machinery that be measured is good, otherwise electric machinery cannot be used.
30, insulation resistance watch measures the stand or fall that sentences high-pressured silicon caboodle
The stand or fall that high-pressured silicon piles, insulation resistance watch is measured sentence. Circuit ground connection two down-lead, osculatory silicon piles polar end. Shake measure resistance of look of positive and negative, block value differs especially auspicious.
Read a value twice to be close to very much, the silicon that be measured piles already invalidation. Two reading infinity, silicon piles interior already open circuit. Twice reading is close to 0, short circuit of the puncture inside silicon caboodle.
31, insulation resistance watch is measured sentence shed stand or fall of high-pressured mercury lamp from the town
Stand or fall of high-pressured mercury lamp, kilovolt insulation resistance is expressed. Circuit ground connection two down-lead, join lamp holder is polar go up. Mercuric lamp park relatively shadow, by shake quickly slow gradually measure.
Reading is not worth half Europe, it is good that halation is given out inside bubble. The lamp does not give off light reading 0, mercuric lamp interior has short circuit. Watch needle indicates infinity, there is open circuit trouble inside the lamp.
32, insulation resistance watch detects the quality of solar tube
Measure solar tube quality, kilovolt insulation resistance is expressed. Avometer dials voltage to block, span sheds 500 bend over continuously. Shake watch avometer is shunt-wound, polarity measures voltage consistently.
Circuit ground connection two down-lead, bond tube two end foot. The light when rated rotate speed is bright, it is normal to be not worth 300 bend overs. Tube sends light a little, above of 300 bend over is anile.
Tube is not ablaze from beginning to end, explain tube already damaged.
33, insulation resistance watch measures those who sentence fluorescent lamp to open brightness implement stand or fall
Of fluorescent lamp open brightness implement, insulation resistance watch is measured sentence. Circuit ground connection two down-lead, join is opened brightness implement polar. Slow jiggle expresses handle, neon bubble puts fulminate glow. Be measured to open brightness implement good, open otherwise brightness implement attaint.
