A、Functional?features?

?Transformer?empty?load?characteristics?tester,?adopting?digital?synchronous?sampling?technology,?accurate?measurement?three-phase?electric?equipment?of?voltage,?current,?power,?power?factor?and?other?parameters?of?the?true?RMS,?with?measuring?speed,?high?precision?and?easy,?lightly,?beautiful,?etc.?Specially?applied?to?power?transformer?power?detection,?this?instrument?can?be?replaced?in?nine?to?the?same?level,?is?the?traditional?pointer?instrument?power?testing?instruments?ideal?old?products.?
May?adopt?240?*?128?lattices.the?LCD?screen?also?showed?a?three-phase?current?and?voltage,?low?voltage?side?of?voltage,?power,?power?factor?parameters.?
2?measurable?various?types?of?transformer?no-load?current,?voltage,?no-load?loss,?short-circuit?short-circuit?loss.?
3?wide?linear?range,?readings?repeatability?and?stable?performance.?
4.?Ensure?power?factor?0.000?~?of?1.000?accurate?measurement,?especially?suitable?for?the?low?power?factor?load?testing.?
⒌?convenient?latch?can?guarantee?the?measurement?data?simultaneity?and?convenience?of?operation.?
6.?Voltage?range?to?amount?to?limit:?voltage?measurement?to?maximum?750V,?don’t?switch?gear?will?ensure?accuracy.?Won’t?because?voltage?gear?to?choose?the?wrong?instrument?itself?has?damaged.?
7.?Big?screen,?high?brightness?liquid?crystal?display?(LCD),?all?Chinese?menu?and?operating?hints?realize?friendly?human-machine?conversation,?touch-key?make?easy?operation.?
8.?The?user?may?at?any?time?will?test?data?through?the?micro?printer?to?print?out?the?results.?

B、Technical?indexes?
1,?input?characteristics?
Voltage?measurement?range:?0?~?1200V?wide?quantity?limit.?
Current?measurement?range:?0?~?80A?internal?all?automatically?switched?range.?
2,?the?accuracy?
Voltage,?current,?+?0.2%?
Power:?+?0.5?per?cent?(Cos?Φ?>?0.1),?+?1.0%?(0.02?3,?working?temperature:?-?10?℃?~?+?40?℃?
4,?insulation:?(1),?voltage,?current?input?to?the?cabinet?of?insulation?resistance???100M?p.?
(2),?work?power?input?to?a?husk?2kV?(inherit?power?frequency?between?the?RMS)?and?lasted?1?minute?experiment.?
5,?volume:?38cm?x?x?28cm?15cm?
6,?weight:?3kg?
C、Structure?appearance
Instrument?by?the?host?and?accessories?box?two?parts,?including?host?is?the?instrument,?the?core?of?all?electrical?parts?in?host?internal,?outside?its?box?adopts?high-strength?aluminum?chassis,?durable,?fittings?box?used?to?hold?test?wire?and?tools.?
1,?panel?decorate?
Panel?arrangement?(figure?2)?


















Figure?2,?panel?arrangement?
As?shown?in?figure?2?shows:?the?most?left?from?top?to?bottom?in?turn?for?characteristics?test?inputs?A,?B,?C?j?output?terminals?A,?B,?C?j?grounding?terminals.?Attention?during?operation?must?ensure?that?connect?the?terminals?of?the?right,?or?else?it?may?affect?test?results?and?even?damage?the?apparatus,?For?the?LCD?panel?upper,?LCD?below?for?printers.?Most?the?right?side?is?the?power?socket?and?switch,?below?is?operating?buttons.?
2,?keyboard?that?
Keyboard?consists?of?six?key,?respectively?is:?cancellation,?-,?↑,?press,?the?confirmation,?the?restoration.?
Each?key?function?is?as?follows:?


↑、↓、→key：The?up?and?down?or?so?key?；
in?main?interface?to?move?the?cursor,?make?its?point?to?need?to??undertake?project?function?bar?(function?bar?
Reverse?white?shown).?
?key?in?the?active?testing?project?preferences?function?and??passive?project?Settings?in?the?LCD?used?to?move?
The?cursor,?make?its?point?to?need?to?change?the?parameters?(including:?high?rated?voltage?transformer?type,?points?after?gear,?rated?voltage?and?rated?current,?voltage?transformer?ratios,?electrorheological?ratio,?temperature,?current?calibration?index,?etc.).?
?key?in?coefficient?calibration?function?used?to?change?measuring??coefficient,?and?can?be?used?to?regulate?the?current?
The?time?and?date.?
?key?in?the?record?browsing?in?the?LCD?used?to?scroll?through??records.?
?button?around?in?the?active?testing?project?preferences?function??in?the?LCD?used?to?toggle?optional?projects,?such?as?high?
Rated?voltage?options?include:?35kV,?110?kV?consumers?10kV,?in?these?gear?in?consecutive?switching,?choose?to?numerical;?In?passive?parameter?Settings?in?the?LCD?when?the?cursor?points?to?the?current?temperature?option,?used?to?toggle?need?calibration?to?rated?conditions?of?temperature?value.?
?button?around?in?coefficient?used?to?move?the?cursor?calibration??function,?make?its?point?of?need?adjustment?coefficient?of?choice?
Item.?

Determine?the?key?:?in?the?main?menu?click?here?namely?into?the?current?toward?the?option.?
Reset?button:?return?key,?push?down?this?button?are?direct?return?to?the?main?menu,?If?the?input?parameters?under?the?state?press?
Cancel?button:?in?the?input?parameters,?and?click?"cancel"?key?input?parameters?effectively.?
D、LCD?interface?
LCD?display?interface?mainly?has?five?function?interface,?respectively?introduced?detailedly?below.?

1,?boot?interface?shown?below.?









2,?at?boot?interface?under?press?any?key?can?enter?the?main?menu,?the?main?menu?pictured?below:?
There?are?five?main?menu?option,?respectively?is:?parameter?setting,?single-phase?short?circuit,?three-wire,?short-circuit,?single?no-load,?three-wire,?racing.?When?the?cursor?point?which?option,?which?icon?becomes?inverse?white?shows,?press?the?up?and?down?or?so?key?can?change?the?cursor?pointing?options.?At?this?point,?press?"sure"?button?to?enter?the?selected?functions?screen.?
3,?parameter?Settings?screen?shown?below:?









Figure?can?be?seen?in?the?first?act?the?presenting?bank,?the?presenting?bank?tip?’key?mobile?options,?or?so?key?to?change?the?current?options’?as?shown,?when?fluctuation?buttons?can?be?to?move?the?cursor?to?other?options,?a?total?of?six?lines?represent?six?parameters,?including:?transformer?capacity,?high?rated?voltage,?low?rated?voltage,?wiring?way,?transformer?type,?the?current?temperature,?the?cursor?point?to?which?one,?on?which?item?change,?figure?JiuZhong?selected?items?as?transformer?capacity,?press?the?button?around?can?change?the?current?transformer?capacity?numerical.?Figure?ShiZhong?selected?item?for?current?temperature,?Press?the?button?around?can?change?the?current?temperature?numerical,?
The?parameters?specific?instructions?are?as?follows:?
Transformer?capacity:?being?measured?the?nominal?capacity?transformer,?unit?value?KVA,?
High?rated?voltage:?being?measured?the?high-pressure?lateral?rated?voltage?transformer,?the?unit?KV,?
Low?rated?voltage:?being?measured?the?low?voltage?side?of?rated?voltage?transformer,?the?unit?KV,?
Wiring?way:?refers?to?be?measured?the?inter-connection?mode?transformer?(i.e.?coupling?category),?including?Y/Yn0,?Dyn11?/?Yzn11?several?ways,?
The?current?temperature:?current?test?environment?temperature,?used?for?transformer?short-circuit?test?(measuring?short-circuit?loss)?will?test?power?testing?results?correction?to?75?℃?(short-circuit?test?rated?conditions?for?75?℃),?don’t?do?this?calibration?input?75?can?(correction?formula?is:?PK75?=?K?x?PK,?including?K?represents?resistance?temperature?coefficient,?the?algorithm?for?K?=?(235?+?75)?/?(235?+?t),?type?of?t?test,?when?actual?temperature?to?impedance?voltage?calibration,?also?according?to?the?formula?with?actuality,?automatic?correction?formula?is?as?follows:?
?
Type:?UKT?represent?the?current?temperature?measured?impedance?voltage?percentage,?
PKT?represent?the?current?temperature?measured?short-circuit?loss,?
SN?said?tested?transformer?rated?capacity;?
Transformer?types:?refers?to?be?measured?transformer?forms?including:?S7,?S13?S9?and?S11,?FJ,?SJ,?and?JB64,?JB73?etc;?
Correction?factor:?generally?choose?2.0?can.?
Ed:?refers?to?the?number?of?subjects?were?transformer?Numbers.?
4,?single-phase?short?circuit?display?as?below:?









Single-phase?short?circuit?current?screen?shows?the?actual?test?voltage?Ua,?current?Ia?and?power?Pa?(conversion?voltage?and?current?transformer?ratios?coefficient,?but?without?calibration);?Also?showed?that?the?correction?of?short?circuit?voltage?Uk,?after?correction?of?power?Pk?(where?the?correction?refers?to?the?rated?current?conditions?short-circuit?test?will?measure?the?power?loss?and?no-load?current?correction?to?rated?current?conditions?number).?Single-phase?short-circuit?test?is?mainly?used?to?test?single-phase?transformer?short-circuit?loss.?After?long?press?measurement?confirmation?button,?the?cursor?to?print?characters,?then?press?print?keys?hit?test?data.?
5,?three-wire,?short-circuit?display?as?below:?












This?screen?shows?current?respectively?of?each?phase?of?the?actual?voltage,?current,?power,?and?each?phase?voltage?average?U,?after?correction?of?short?circuit?voltage?percentage?of?Uk?%,?after?adjusting?for?load?loss?Pk?(non?rated?current?conditions?short-circuit?test?will?measure?the?power?loss?and?short?circuit?voltage?adjustment?for?rated?current?conditions?number).?
After?long?press?measurement?confirmation?button,?the?cursor?to?print?characters,?then?press?print?keys?hit?test?data.?
6?and?single-phase?no-load?display?as?below:?




??

??????????????????????????
Single-phase?approach?to?measure?no-load?will?output?AB?received?transformer?AB?two-phase?can.?After?long?press?measurement?confirmation?button,?the?cursor?to?print?characters,?then?press?print?keys?hit?test?data.?
7?and?the?third?no-load?shown?below:?











Three-wire?no-load?test?process:?a,?connect?well?test?line,?with?pressure?regulator?slowly?pressor,?until?it?reaches?the?rated?voltage?value;?B?and?press?ok?button,?the?instrument?will?test?results?and?the?determination?of?the?results?calculated.?One?shown?above?is?to?test?process?of?real-time?data,?unceasingly?in?the?refresh,?Includes?every?phase?measured?voltage,?current,?power,?three-phase?average?voltage,?idle?current?percentage,?no-load?loss,?etc.?After?long?press?measurement?confirmation?button,?the?cursor?to?print?characters,?then?press?print?keys?hit?test?data.?


E、Method?of?use?:

Firstly,?the?basic?concept?
No-load?test:?from?a?winding?transformer?(general?from?second?low?voltage?side)?rated?exert?sine?wave?frequency?rated?voltage,?the?rest?of?the?winding?open?and?measuring?idle?current?and?no-load?loss.?If?the?test?condition?is?limited,?can?not?reach?the?rated?voltage?power?supply?voltage,?can?be?in?the?rated?voltage?condition?test,?this?experiment?method?error?is?larger,?only?commonly?used?to?examine?the?transformer?is?trouble-free,?only?the?rated?voltage?of?the?test?voltage?reached?80%?above?just?can?be?used?to?test?no-load?loss.?
The?short-circuit?test:?will?transformer?low-pressure?large?current?side?artificial?short?connection,?from?one?side?of?coil?voltage?high?rated?points?within?the?ventilation?with?rated?frequency?test?voltage,?make?the?winding?of?current?reach?ratings,?and?then?measured?input?power?and?applying?voltage?(namely?short-circuit?loss?and?short?circuit?voltage?and?current?value).?
2,?test?methods?
According?to?different?test?items?below?separately?introduced:?
(1),?three-phase?power?measurement?of?transformer?no-load?loss:?will?not?test?the?transformer?open?and?referring?to?the?following?figure?way?wiring?
?
Figure?19?three-phase?power?measurement?transformer?no-load?loss?

(2),?three-phase?three-wire?power?transformer?short-circuit?measurement?loss:?from?transformer?hv?lateral?exert?three-phase?test?power,?low?voltage?side?using?the?dedicated?short?wires?good?short?sub?image?below?for?wiring.?
?
Figure?21st?three-phase?power?transformer?short-circuit?measurement?loss?

Note:?here?we?adopt?method?is?equivalent?to?previous?two?power?meter?method,?voltage?measurements?at?UAB,?UCA?and?UCB?three-phase?voltage?values,?the?results?for?the?average;?three-phase?Power?loss?only?measuring?PAB?and?PCB?two-phase?power,?total?loss?as?two?phase?power?loss?sum.?
F、printing?function

Each?done?a?test,?hold?confirmation?button?two?empress,?shadow?moved?to?print?characters,?then?click?ok?button?to?print?out?measurement?data.?
G、the?matters?needing?attention

1?and?when?measuring?process?must?not?touch?the?metal?parts?of?the?test?line,?to?avoid?being?electrically?damaging.?
2,?measuring?wiring?must?strictly?according?to?the?instructions,?otherwise?the?consequence?is?proud.?
3,?test?carefully?before?check?Settings?parameters?correctly.?
4,?had?better?use?have?ground?power?outlet.?
5,?cannot?be?in?voltage?and?current?under?the?condition?of?limited?excessive?work.?
6,?short-circuit?test,?the?pressure?side?short?sub?must?be?good,?otherwise,?it?will?have?influence?on?the?result?of?the?test.?
7,?do?the?short-circuit?test,?if?high-pressure?or?medium?voltage?side?with?ring?current?transformer?_?casing,?before?the?test?current?transformer?of?secondary?must?be?short-circuited.?
8,?experimental?wiring?job?must?be?test?line?grounding?conditions,?prevent?inductive?voltage?electric?shock.?All?short-circuit,?grounding?and?fuses?should?have?enough?section,?and?must?connecting?firm.?Test?organization?work?to?tight,?communication?is?smooth,?to?ensure?safety?test?work?smoothly.?
?
Appendix?3:?
Consumers?10kV?(6kV)?series?of?distribution?transformer?technical?parameters
Nominalcapacity?(kVA)????High?rated?current?（A）????Low?rated?current?（A）????No-load?loss（kW）????Load?loss?（kW）????Impedance?voltage?（%）????Idle?current?（%）
????????????S7????S9????S11????S7????S9????S11????S7????S9????S11????S7????S9????S11
????????????????0.04????????????0.18????????????4.0????????????2.85????
????????????????0.05????????????0.21????????????4.0????????????2.72????
????????????????0.06????????????0.3????????????4.0????????????2.65????
????????????????0.1????????????0.5????????????4.0????????????2.6????
30????1.732????43.3????0.15????0.13????0.1????0.8????0.6????0.6????4.0????4.0????4.0????2.8????2.1????2.1
50????2.887????72.17????0.19????0.17????0.13????1.15????0.87????0.87????4.0????4.0????4.0????2.6????2.0????2.0
63????3.637????90.94????0.22????0.2????0.15????1.4????1.04????1.04????4.0????4.0????4.0????2.5????1.9????1.9
80????4.619????115.5????0.27????0.25????0.18????1.65????1.25????1.25????4.0????4.0????4.0????2.4????1.8????1.8
100????5.774????144.3????0.32????0.29????0.2????2.0????1.5????1.5????4.0????4.0????4.0????2.3????1.6????1.6
125????7.217????180.4????0.37????0.34????0.24????2.45????1.8????1.8????4.0????4.0????4.0????2.2????1.5????1.5
160????9.238????230.9????0.46????0.4????0.29????2.85????2.2????2.2????4.0????4.0????4.0????2.1????1.4????1.4
200????11.55????288.7????0.54????0.48????0.33????3.5????2.6????2.6????4.0????4.0????4.0????2.1????1.3????1.3
250????14.43????360.9????0.64????0.56????0.4????4.0????3.05????3.05????4.0????4.0????4.0????2.0????1.2????1.2
315????18.19????454.7????0.76????0.67????0.48????4.8????3.65????3.65????4.0????4.0????4.0????2.0????1.1????1.1
400????23.09????577.4????0.92????0.8????0.57????5.8????4.3????4.3????4.0????4.0????4.0????1.9????1.0????1.0
500????28.87????721.7????1.08????0.96????0.68????6.9????5.1????5.1????4.0????4.0????4.0????1.9????1.0????1.0
630????36.37????909.4????1.3????1.2????0.81????8.1????6.2????6.2????4.5????4.5????4.5????1.8????0.9????0.9
800????46.19????1155????1.54????1.4????0.98????9.9????7.5????7.5????4.5????4.5????4.5????1.5????0.8????0.8
1000????57.74????1443????1.8????1.7????????11.6????10.3????????4.5????4.5????????1.2????0.7????
1250????72.17????1804????2.2????1.95????????13.8????12????????4.5????4.5????????1.2????0.6????
1600????92.38????2309????2.65????2.4????????16.5????14.5????????4.5????4.5????????1.1????0.6????

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