Instruction Manual of Capacitor Voltage Transformers

1

Instruction Manual of Capacitor Voltage Transformers 0GR.463.354-2010

1 Technical characteristics

Capacitor voltage tranformers (hereinafter referred to as “CVTs”) have the

following characteristics：

a）Iron core “C” technology makes CVTs more stable and reliable.

b）Rapid-saturable damp technique can effectively suppress ferro-resonance and keep

three-phase open-delta residual voltage below 1V.

c）Residual voltage of transient response can be below 5%. This is able to meet the

requirements of quick relay protection device.

d）The quality is reliable due to good dielectric and insulation material, advanced

design and vacuum impregnation, and excellent partial discharge.

e）CVTs do not need to be made maintenance, oil filter and oil change, oil sample

inspection during normal service.

2 Purpose and applicable range

2.1 Purpose

CVTs series is used for high-voltage, extra-high voltage, ultra-high voltage power

system at rated frequency 50Hz. They are intended to provide voltage signal for electrical

measurement instrument, protection and control device, and as a coupling capacitor for

carrier coupling device for power line.

2.2 Applicable range

CVTs are installed outdoor. Ambient air temperature for installation and operation

area is -40℃ to +55℃. Altitude does not exceed 2000m.（if altitude exceeds 2000m, CVTs

can be specially manufactured in accordance with the purchaser after agreed between the

purchaser and manufacturer）. Wind velocity is not more than 150km/h. Earthquake

intensity does not exceed 8 without serious pollution, vibration and bump.

3 Type and main technical data

3.1 Description of type

When the subscript (serial number of design) is double-digit, it represents euipped with

2

intermediate earthing switch.

When the last letter is “TH” or “G”, it respectively represents damp tropics and plateau.

T YD 3 66/ 3 0.02 H F

non-effectively earthed neutral antipollution rated capacitance μF rated phase voltage kV serial number of design

capacitor voltage transformer equipment

Note: Serial number of design represents that number of secondary winding. In case of 3, represents

that number of secondary winding of the product is 3. In case of 13, represents that the product is

equipped with intermediate earthing switch and number of secondary winding is 3.

3.2 Main technical data

3.2.1 CVTs can continuoulsy operate at 1.2 times rated primary voltage. CVTs for

effectively earthed neutal system can operate for 30s at 1.5 times rated primary voltage.

CVTs for auto tripping non-earthed neutral system without earth fault can operate for 8h at

1.9 times rated primary voltage.

3.2.2 Connection group of intermediate transformer winding is 1/1/1-12-12 or

1/1/1/1-12-12-12 or 1/1/1/1/1-12-12-12-12。

3.2.3 Creepage distance of the product having a “H” in the type is not less than 25mm/kV

（calculated on system highest voltage）. Special creepage distance is given in annotations of

certificate of product.

3.2.4 Insulation level of CVTs are given in Table 1.

3.2.5 Accuracy class and corresponding voltage error, phase angle error, and operating

conditions of CVTs are given in Table 2.

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Table 1 Insulation Level of CVTs kV

Rated primary voltage 35/ 3 66/ 3 110/ 3 115/ 3 132/ 3 150/ 3 220/ 3 230/ 3 275/ 3 330/ 3 400/ 3 500/ 3 765/ 3 1000/ 3

System rated voltage 35 66 110 115 132 150 220 230 275 330 400 500 750 1000

System highest voltage 40.5 72.5 126 123 145 170 252 245 300 363 420 550 800 1100

Rated short duration

power-frequency withstand

voltage

（r.m.s）1min

95 160 200 230 275 325 395 460 460 510 520 740 9751300

（5 min）

Rated lightning impulse

withstand voltage

（peak）1.2/50μs

200 350 480 550 650 750 950 1050 1050 1175 1425 1675 2100 2400

Rated switching impusle

withstand voltage

（peak）250/2500μs

- - - - - - - - 850 950 1050 1175 1550 1800

Table 2 Operating Conditions and Error Limit Value of CVTs Measuring accuracy class Protection accuracy

Item 0.2 0.5 1.0 3.0 3P 6P

Voltage error（％） ±0.2 ±0.5 ±1.0 ±3.0 ±3.0 ±6.0 Error limit

value Phase displacement error（′）

±10 ±20 ±40 Not

specified±120 ±240

Voltage（％） 80～120 5～150 （or 5～190）Permissible frequency range（％）

99～101 96～102

Permissible temperature range

Lower to upper limit temperature of temperature category

Burden（％） 25～100

Operating

conditions

Burden power factor 0.8（lagging） Note：The value in brackets is applied to CVTs for neutral non-effectively earthed system.

3.2.6 Carrier capacitance of capacitor divider C, and tolerance of high-voltage capacitance

C1 and intermediate capacitance C2 shall be -5％ to +10％ of ratings. The error between

tolerance of C1 and C2 does not exceed 5％.

3.2.7 Tangent of loss angle of capacitor divider ( tanδ) is not more than 0.0012.

3.2.8 CVTs shall conform to GB/T 4703《Capacitor Voltage Transformers》.

3.2.9 Main technical data of CVTs are given in Table 3.

4 Operating theory and main structure

4.1 Operating theory

CVT is divided voltage by capacitor divider. Intermediate transformer changes intermediate

4

voltage to secondary voltage. The sum of reactance of compensation reactor and leakage

reactance of CVT, and equivalent capacitive reactance [)C(C

121+ω] in serial resonance can

eliminate voltage variation due to capacitive reactance voltage drop with the change of

secondary burden. This can make voltage stable. The electrical principle diagram is given in

Figure 1.

4.2 Main structure

CVTs have two kinds of structure of combination single stack and separation. Both of them

consist of capacitor divider and electromagnetic unit. The capacitor divider consists of one or

more section capacitors in series. Line terminals are on the top of capacitor divider.

Figure 1 Electrical principle diagram Where, C —— Carrier capacitance

1a1n——Secondary 1a1n winding terminal C1 —— High-voltage capacitance 2a2n—— Secondary 2a2n winding terminal C2 —— Intermediate capacitance dadn —— Residual voltage winding terminal

Up —— Primary voltage XL—— Low-voltage terminal of compensation reactor

A′—— Intermediate terminal —— Earthing terminal

T—— Intermediate transformer N—— Carrier communication terminal（low-voltage terminal，not exposed weather） L—— Compenstiaon reactor D —— Damp device P—— Protection device J—— Carrier combination device with arresters（provided by purchaser）

S—— Intermediate earthing switch (distribute when the purchaser requires)

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The electromagnetic unit consists of intermediate transformer, compensation reactor

and damp device(ferro-resonance suppression) mounted in the tank. Secondary winding

terminals and carrier communication terminals are leaded by outgoing terminal box on the

face of the tank.

CVTs equipped with intermediate earthing switch belong to special products. Please

specify them when ordering. Intermediate earthing switch is mounted on the wall of the tank.

5 Lifting and storage

5.1 Lifting single section capacitor is necessary during packing, devanning, testing and

erection, etc. For CVTs having a 220kV and up to 220kV, it is not permissible that more

section capacitors are stacked to lift.

5.2 During transportation and storage, CVTs have to keep right side up, preventing from

collision and other mechanical hurt. CVTs shall be stored a place where ambient air

temperature is -40℃ to +55℃, without flammability, explosion, corrosion and vibration.

6 Installation and commissioning

6.1 CVTs shall be mounted on solid horizontal base in accordance with clause 2.2.

Connection between CVTs and the base is fixed by screws, nuts and washers. Connection

between capacitors is also fixed by screws, nuts and washers.

6.2 Line terminals on primary side of CVTs is connection board on the top cover of

capacitor divider. Terminal N, in secondary outgoing box, is connected with carrier coupling

device or directly “ ”. (During operation, this terminal has to directly connected with “ ”

by connection sheets provided by manufacturer. As carrier communication, this terminal is

connected in series to the carrier coupling device, then disconnect connection sheets). The

tank must be solidly directly connected to the ground. Secondary circuit is made an electrical

joint by secondary outgoing terminals in outgoing box.

6.3 Capcitor divider and electromagnetic unit of each ex-factory CVT have been adjusted

the error, so the CVT shall not be exchangeable each other.

6.4 Intermediate earthing switch is short-circuited connected with intermediate transformer

for the CVT testings at site. The handle of intermediate earthing switch during CVT service

6

has to fix at “normal operation”, otherwise intermediate transformer is short-circuited

connected. It is prohibited from using intermediate earthing switch at energization.

Schematic diagram of the handle is given in Figure 8.

6.5 CVTs are energized as long as mechanical and electrical joints are correct and reliable.

6.6 Internal terminal “ ” in secondary outgoing terminal box has connected with the tank.

7 Service and safety

7.1 Service conditions of CVTs shall be in accordance with clause 2.2, 3.2.4, 3.2.5.

7.2 When communication terminal N is regarded as carrier communication, it is

earthed through carrier combination device. Otherwise, it is directly connected to the

ground not to open circuit. When low-voltage terminal XL of compensation reactor is

operating, it must directly be connected to the ground to prohibit open circuit except

energization inspection.

7.3 After CVTs are cut off power supply to remove service, touch them after the electrical

conductive part is discharged many times by earth rod.

8 Maintenance

8.1 It is suggested that capacitance and tanδ value are checked once each year. During

inspection, ambient air temperature is 25℃±10℃. The device of capacitance and dielectric

loss measurement is higher than class 3. When the tolerance between capacitance and

measured value in certificate of product exceeds ±5% or tanδ exceeds 0.3%, CVTs shall

be stopped service.

8.2 CVTs are hermetically internally filled in insulating oil. Sealing state of CVTs is usually

checked during service. Inspection location is joint position among upper and lower cover

plate of the capacitor and porcelain bushings, and joint position between outgoing plate

inner secondary outgoing box and the tank. In case of leakage, CVTs shall be stopped

service.

8.3 Oil level in a visual window shall be usually checked during service. When CVTs are

operating at maximum ambient air temperature +55℃, it is natural that oil level does not

exceed maximum position of the window. When CVTs are operating at minimum ambient

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air temperature -40℃, it is natural that oil level does not exceed minimum position of the

window. Once oil level exceeds maximum or mimimum position of the window, detect

whether capacitance and temperature rise of CVTs are abnormal. If the tolerance between

two measured capacitance of single section capacitor is 1%, CVTs shall be removed service

to make an inspection. Temperature rise of the same capacitor and electromagnetic unit of

the same product is compared, using infrared temperature measurement device. In case of

abnormal, CVTs shall be removed service to make an inspection.

During service, do not need to make oil filter, oil change and oil sample inspection.

8.4 Testing principle diagram of capacitance and tanδ measurement are given in Figure 9

to11. Capacitance and tanδ inspection are carried out by other correct methods.

Electrical principle diagram of capacitance and tanδ measurement on CVTs equipped

with intermediate earthing switch are made according to Figure 9 and 10. Electrical

principle diagram of capacitance and tanδ measurement on CVTs without intermediate

earth switch is given in Figue11. The measurement is carried out by other correct

methods.

At measurement, strictly conform to testing principle diagram and explanation.

8.5 CVTs are enclosed products, capacitor divider can not be separated from electromagnetic

unit unless the manufacturer agrees. During acceptance and service, do not make a withstand

voltage test on forming the whole of connecting lower section capacitor and electromagnetic

unit.

8.6 Burden of secondary windings shall be in the range of 25% to 100% of corresponding

rated burden. Residual voltage windings shall be equipped without burdens during normal

operation, otherwise error limit value of secondary output voltage do not guarantee a

specified range in Table 2.

8.7 During service, usually check whether mechanical and electrical joints of CVTs are

normal and reliable.

8.8 After CVTs are cut off power supply to remove service, touch them after the electrical

conductive part is discharged many times by earth rod.

8

9 Common faults and solution

9.1 The tank oil leakage of electromagnetic unit of CVTs. The tank oil leakage is usually

appeared on the edge around insulation board inner secondary outgoing box. The

solution is that tighten surrounding sealing screws.

9.2 Terminal N on the insulation board has discharged to the earthing tank. Burning

insulation board is not directly connected to “ ” because terminal N is not regarded as

carrier communication.

10 List of supply of CVTs is given in Table 4.

11 Type selection of CVTs

If only rated primary voltage, rated capacitance, number of secondary winding, voltage

and accuracy class/burden of each secondary winding are determined, type of CVTs is

selected.

For example, known rated primary voltage of 110/ 3 kV, rated capacitance of

0.01μF, 3 secondary windings, respective voltage of 0.1/ 3 kV, 0.1/ 3 kV, 0.1 kV，

corresponding accuracy class/burden: 0.2/50VA, 0.5/50VA, 3P/50V，then item 11 CVT

TYD3110/√3-0.01H in Table 3 can satisfy the requirments. In case of equipped with

intermediate earthing switch, please select TYD13110/ 3 -0.01H.

Special design is able to be carried out in accordance with the purchaser.

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Table 3 Main Technical Data of CVTs

SN Type

Rated

voltage

kV

Rated

capacitance

μF

Accuracy

class/

secondary

burden VA

Outline and

installation

（hole）

dimension（mm）

L×W1×H，

ΦA，L1×W2

Outline

drawing

Weight

kg

CG

H Height

h

mm

1* TYD235/ 3 -0.01HF

35/ 3

0.1/ 3

0.1/3

0.01 1a1n：0.2/20

dadn：3P/100

2* TYD335/ 3 -0.01HF

35/ 3

0.1/ 3

0.1/ 3

0.1/3

0.01

1a1n：0.2/10

2a2n：0.5/20

dadn：3P/100

3 TYD235/ 3 -0.02HF

35/ 3

0.1/ 3

0.1/3

0.02 1a1n：0.2/30

dadn：3P/100

4

TYD335/ 3 -0.02HF

35/ 3

0.1/ 3

0.1/ 3

0.1/3

0.02

1a1n：0.2/20

2a2n：0.5/20

dadn：3P/100

760×φ685×1490

4×φ25

Pitch of holes

500×500

480 610

5*

TYD366/ 3 -0.01HF

66/ 3

0.1/ 3

0.1/ 3

0.1/3

0.01

1a1n：0.2/10

2a2n：0.5/20

dadn：3P/100

6*

TYD366/ 3 -0.015HF

66/ 3

0.1/ 3

0.1/ 3

0.1/3

0.015

1a1n：0.2/20

2a2n：0.5/20

dadn：3P/100

7

TYD366/ 3 -0.02HF

66/ 3

0.1/ 3

0.1/ 3

0.1/3

0.02

1a1n：0.2/20

2a2n：0.5/20

dadn：3P/100

760×φ685×2100

4×φ25

Pitch of holes

500×500

642 800

8*

TYD2110/ 3 -0.007H

TYD12110/ 3 -0.007H

110/ 3

0.1/ 3

0.1 0.007

an：0.2/50

dadn：3P/100

670×φ590×2040

4×φ25

Pitch of holes

480×480

480

800

9*

TYD3110/ 3 -0.007H

TYD13110/ 3 -0.007H

110/ 3

0.1/ 3

0.1/ 3

0.1

0.007

1a1n：0.2/50

2a2n：0.5/75

dadn：3P/100

760×φ685×2100

4×φ25

Pitch of holes

550×550

490

800

10

TYD2110/ 3 -0.01H

TYD12110/ 3 -0.01H

110/ 3

0.1/ 3

0.1 0.01

an：0.2/50

dadn：3P/100

670×φ590×2040

4×φ25

Pitch of holes

480×480

480

800

11

TYD3110/ 3 -0.01H

TYD13110/ 3 -0.01H

110/ 3

0.1/ 3

0.1/ 3

0.1

0.01

1a1n：0.2/50

2a2n：0.5/75

dadn：3P/100

490

800

12 TYD4110/ 3 -0.01H

TYD14110/ 3 -0.01H

110/ 3

0.1/ 3

0.1/ 3

0.1/ 3

0.1

0.01

1a1n：0.2/50

2a2n：0.5/50

3a3n：0.5/50

dadn：3P/100

510

800

13*

TYD3110/ 3 -0.015H

TYD13110/ 3 -0.015H

110/ 3

0.1/ 3

0.1/ 3

0.1

0.015

1a1n：0.2/75

2a2n：0.5/100

dadn：3P/100

760×φ685×2100

4×φ25

Pitch of holes

550×550

Figure 2

500 800

10

Table 3（continued）

SN Type

Rated

voltage

kV

Rated

capacitance

μF

Accuracy class/

secondary burden

VA

Outline and

installation

（holes）

dimension（mm）

L×W1×H，

ΦA，L1×W2

Outline

drawing

Weight

kg

CG

Height

h

mm

14

TYD3110/ 3 -0.02H

TYD13110/ 3 -0.02H

110/ 3

0.1/ 3

0.1/ 3

0.1

0.02

1a1n：0.2/100

2a2n：0.5/100

dadn：3P/100

760×φ685×2100

4×φ25

Pitch of holes

550×550

610

800

15 TYD4110/ 3 -0.02H

TYD14110/ 3 -0.02H

110/ 3

0.1/ 3

0.1/ 3

0.1/ 3

0.1

0.02

1a1n：0.2/50

2a2n：0.5/50

3a3n：0.5/50

dadn：3P/100

760×φ685×2120

4×φ25

Pitch of holes

550×550

715

800

16*

TYD3110/ 3 -0.025H

TYD13110/ 3 -0.025H

110/ 3

0.1/ 3

0.1/ 3

0.1

0.025

1a1n：0.2/100

2a2n：0.5/100

dadn：3P/100

760×φ685×2100

4×φ25

Pitch of holes

550×550

610

800

17*

TYD4110/ 3 -0.025H

TYD14110/ 3 -0.025H

110/ 3

0.1/ 3

0.1/ 3

0.1/ 3

0.1

0.025

1a1n：0.2/75

2a2n：0.5/75

3a3n：3P/75

dadn：3P/100

760×φ685×2080

4×φ25

Pitch of holes

550×550

715

800

18*

TYD3110/ 3 -0.04H

TYD13110/ 3 -0.04H

110/ 3

0.1/ 3

0.1/ 3

0.1

0.04

1a1n：0.2/100

2a2n：0.5/100

dadn：3P/100

760×φ685×2130

4×φ25

Pitch of holes

550×550

740

1000

19* TYD2115/ 3 -0.01H

115/ 3

0.1/ 3

0.1

0.01 an：0.2/50

dadn：3P/100

670×φ590×2000

4×φ25

Pitch of holes

480×480

460

800

20* TYD3132/ 3 -0.015H

132/ 3

0.1/ 3

0.1/ 3

0.1

0.015

1a1n：0.2/75

2a2n：0.5/100

dadn：3P/100

760×φ685×2335

4×φ30

Pitch of holes

550×550

Figure 2

740

1100

21*

TYD2220/ 3 -0.0035H

TYD12220/ 3 -0.0035H

220/ 3

0.1/ 3

0.1

0.0035 an：0.2/50

dadn：3P/100

670×φ590×3354

4×φ25

Pitch of holes

480×480

668

1340

22*

TYD3220/ 3 -0.0035H

TYD13220/ 3 -0.0035H

220/ 3

0.1/ 3

0.1/ 3

0.1

0.0035

1a1n：0.2/50

2a2n：

0.5/100

dadn：3P/100

760×φ685×3390

4×φ25

Pitch of holes

550×550

780

1375

23

TYD2220/ 3 -0.005H

TYD12220/ 3 -0.005H

220/ 3

0.1/ 3

0.1

0.005 an：0.2/50

dadn：3P/100

660×φ590×3354

4×φ25

Pitch of holes

480×480

668

1340

24

TYD3220/ 3 -0.005H

TYD13220/ 3 -0.005H

220/ 3

0.1/ 3

0.1/ 3

0.1

0.005

1a1n：0.2/50

2a2n：0.5/75

dadn：3P/100

760×φ685×3390

4×φ25

Pitch of holes

550×550

780

1375

25

TYD4220/ 3 -0.005H

TYD14220/ 3 -0.005H

220/ 3

0.1/ 3

0.1/ 3

0.1/ 3

0.1

0.005

1a1n：0.2/50

2a2n：0.5/50

3a3n：0.5/50

dadn：3P/100

760×φ685×3390

4×φ25

Pitch of holes

550×550

Figure 3

780

1375

11


SN Type

Rated

voltage

kV

Rated

capacitance

μF

Accuracy

class/

secondary

burden VA

Outline and

installation

（holes）

dimension（mm）

L×W1×H，

ΦA，L1×W2

Outline

drawing

Weight

kg

CG

Height

h

mm

26*

TYD3220/ 3 -0.0075H

TYD13220/ 3 -0.0075H

220/ 3

0.1/ 3

0.1/ 3

0.1

0.0075

1a1n：0.2/100

2a2n：0.5/100

dadn：3P/100

785

1375

27

TYD3220/ 3 -0.01H

TYD13220/ 3 -0.01H

220/ 3

0.1/ 3

0.1/ 3

0.1

0.01

1a1n：0.2/100

2a2n：0.5/100

dadn：3P/100

760×φ685×3440

4×φ25

Pitch of holes

550×550

860

1375

28

TYD4220/ 3 -0.01H

TYD14220/ 3 -0.01H

220/ 3

0.1/ 3

0.1/ 3

0.1/ 3

0.1

0.01

1a1n：0.2/50

2a2n：0.5/50

3a3n：0.5/50

dadn：3P/100

760×φ685×3410

4×φ25

Pitch of holes

550×550

1025

1375

29*

TYD3220/ 3 -0.0125H

TYD13220/ 3 -0.0125H

220/ 3

0.1/ 3

0.1/ 3

0.1

0.0125

1a1n：0.2/100

2a2n：0.5/100

dadn：3P/100

760×φ685×3440

4×φ25

Pitch of holes

550×550

860

1375

30*

TYD4220/ 3 -0.0125H

TYD14220/ 3 -0.0125H

220/ 3

0.1/ 3

0.1/ 3

0.1/ 3

0.1

0.0125

1a1n：0.2/100

2a2n：3P/100

3a3n：3P/100

dadn：3P/100

760×φ685×3410

4×φ25

Pitch of holes

550×550

1025

1375

31*

TYD3220/ 3 -0.02H

220/ 3 0.1/ 3

0.1/ 3

0.1

0.02

1a1：0.2/100

2a2：0.5/100

dadn：3P/100

760×φ685×3530

4×φ25

Pitch of holes

550×550

1100

1580

32* TYD2230/ 3 -0.005H

230/ 3

0.1/ 3

0.1

0.005 an：0.2/50

dadn：3P/100

660×φ590×3340

4×φ25

Pitch of holes

480×480

Figure 3

668

1340

33*

TYD3275/ 3 -0.0075H

275/ 3

0.1/ 3

0.1/ 3

0.1

0.0075

1a1n：0.2/75

2a2n：0.5/75

dadn：3P/100

34

TYD3330/ 3 -0.005H

TYD13330/ 3 -0.005H

330/ 3

0.1/ 3

0.1/ 3

0.1

0.005

1a1n：0.2/75

2a2n：0.5/100

dadn：3P/100

35

TYD4330/ 3 -0.005H

TYD14330/ 3 -0.005H

330/ 3

0.1/ 3

0.1/ 3

0.1/ 3

0.1

0.005

1a1n：0.2/50

2a2n：0.5/50

3a3n：3P/50

dadn：3P/100

36*

TYD3330/ 3 -0.0075H

TYD13330/ 3 -0.0075H

330/ 3

0.1/ 3

0.1/ 3

0.1

0.0075

1a1n：0.2/100

2a2n：0.5/100

dadn：3P/100

37*

TYD3330/ 3 -0.01H

TYD13330/ 3 -0.01H

330/ 3

0.1/ 3

0.1/ 3

0.1

0.01

1a1n：0.2/100

2a2n：0.5/100

dadn：3P/100

760×φ685×4770

4×φ30

Pitch of holes

550×550

Figure 4

1441

2230

12


SN Type

Rated

voltage

kV

Rated

capacitance

μF

Accuracy class/

secondary burden

VA

Outline and

installation

（holes）

dimension（mm）

L×W1×H，

ΦA，L1×W2

Outline

drawing

Weight

kg

CG

Height

h

mm

38

TYD3400/ 3 -0.005H

400/ 3

0.1/ 3

0.1/ 3

0.1

0.005

1a1n：0.2/75

2a2n：0.5/75

dadn：3P/75

760×φ685×5490

4×φ30

Pitch of holes

550×550

1825 2400

39

TYD3500/ 3 -0.005H

TYD13500/ 3 -0.005H

500/ 3

0.1/ 3

0.1/ 3

0.1

0.005

1a1n：0.2/75

2a2n：0.5/75

dadn：3P/75 2020 2800

40

TYD4500/ 3 -0.005H

TYD14500/ 3 -0.005H

500/ 3

0.1/ 3

0.1/ 3

0.1/ 3

0.1

0.005

1a1n：0.2/75

2a2n：0.5/75

3a3n：3P/75

dadn：3P/100

2020 2800

41

TYD3525/ 3 -0.005H

TYD13525/ 3 -0.005H

525/ 3

0.1/ 3

0.1/ 3

0.1

0.005

1a1n：0.2/75

2a2n：0.5/75

dadn：3P/75 2360 2800

42

TYD4525/ 3 -0.005H

TYD14525/ 3 -0.005H

525/ 3

0.1/ 3

0.1/ 3 0.1/ 3

0.1

0.005

1a1n：0.2/75

2a2n：0.5/75

3a3n：3P/75

dadn：3P/100

2020 2800

43

TYD3550/ 3 -0.005H

TYD13550/ 3 -0.005H

550/ 3

0.1/ 3

0.1/ 3

0.1

0.005

1a1n：0.2/75

2a2n：0.5/75

dadn：3P/75

2020 2800

44

TYD4550/ 3 -0.005H

TYD14550/ 3 -0.005H

550/ 3

0.1/ 3

0.1/ 3 0.1/ 3

0.1

0.005

1a1n：0.2/75

2a2n：0.5/75

3a3n：3P/75

dadn：3P/100

760×φ685×6185

4×φ30

Pitch of holes

550×550

Figure 5

2020 2800

45 TYD13765/ 3 -0.005H

765/ 3

0.1/ 3

0.1/ 3

0.1

0.005

1a1n：0.2/50

2a2n：0.5/50

dadn：3P/50

46

TYD14765/ 3 -0.005H 765/ 3

0.1/ 3

0.1/ 3

0.1/ 3

0.1

0.005

1a1n：0.2/30

2a2n：0.5/50

3a3n：0.5/50

dadn：3P/50

1007×φ710×8265

6 × φ 34 evenly

distributed on

the circle φ805

Figure 6 3220 3900

13

Table 3 (end)

SN Type

Rated

voltage

kV

Rated

capacitance

μF

Accuracy class/

secondary burden

VA

Outline and

installation

（holes）

dimension（mm）

L×W1×H，

ΦA，L1×W2

Outline

drawing

Weight

kg

CG

Height

h

mm

47

TYD 1000/ 3 -0.005H

（separation）

1000/ 3

0.1/ 3

0.1/ 3

0.1/ 3

0.1

0.005

1a1n：0.2/15

2a2n：0.5/15

3a3n：0.5/15

dadn：3P/15

Capacitor divider：

1035×φ710×12600

6 × φ 34 evenly

distributed on

the circleφ805

electromagnetic unit：

1215×810×645

4×φ25

Pitch of holes

550×550

Figure 7 5880 5520

Note：① CG: centre of gravity.

② Type with “*”in SN is irregular product, which is not recommended.

③ Accuracy class/secondary burden is made a commissioning in accordance with the purchaser.

14

Table 4 List of Supply of CVTs Parts of each CVT

Electromagnetic unit capacitor

divider①

connector

Single stack Separation SN Type

Whole Electromagnetic

unit

Lower section

capacitor

divider

Middle

section

Upper

section

corona

stud②

nutSpring

washer

Flat

washer

Line

terminal③

Package

case

Instruction

manual

1 TYD□35 1 1 1 1

2 TYD□66 1 1 1 1

3 TYD□110 1 1 1 1

4 TYD□115 1 1 1 1

5 TYD□132 1 1 1 1

6 TYD□220 1 1 8 16 16 16 1 2 1

7 TYD□230 1 1 8 16 16 16 1 2 1

8 TYD□275 1 1 1 1 16 32 32 32 1 4 1

9 TYD□330 1 1 1 1 16 32 32 32 1 4 1

10 TYD□400 1 1 1 1 20 40 40 40 1 4 1

11 TYD□500 1 1 1 1 20 40 40 40 1 4 1

12 TYD□500 1 1 1 1 1 30 60 60 60 1 5 1

13 TYD□765 1 2 1 1 30 60 60 60 1 5 1

14 TYD□1000 1 1 3 1 4 40 80 80 80 1 9 1

15

Note：① Each section capacitor is assembled on the basis of capacitor number and sequence on nameplate.

② Stud of product 220kV is GB/T 901（line：M12×120,busbar：M14×130）. Stud of product 330kV is GB/T 901（M14×130）. Stud of 500kV product is GB/T 901（M14

×140）. Stud of product 765kV is GB/T 901（M16×140）.Stud of 1000kV product is GB/T 901（M20×160）. Nuts and washers match to corresponding studs

③ Ex-factory line terminals has been mounted on the cover on upper section capacitor divider or put in the package case of corona.

④ Serial number of design is filled in □. Please see clause 3.1 for details.

15

Figure 2

1 High-voltage capacitance C1 2 Intermediate voltage capacitance C2

3 Intermediate-voltage bushing 4 Secondary outgoing box

5 Connection board 6 Electromagnetic unit

7 Low-voltage bushing 8 Line terminal

9 Connection sheet D Damp device

N Carrier communication terminal L Compensation reactor

P Protection device T Intermediate transformer

XL Low-voltage terminal of compensation reactor

1a1n Secondary 1a1n winding terminal


dadn Residual voltage winding terminal

16

Figure 3

1 High-voltage capacitance C1 2 Intermediate voltage capacitance C2

3 Intermediate-voltage bushing 4 Secondary outgoing box

5 Connection board 6 Electromagnetic unit

7 Low-voltage bushing 8 Line terminal

9 Connection sheet D Damp device

N Carrier communication terminal L Compensation reactor

P Protection device T Intermediate transformer

XL Low-voltage terminal of compensation reactor




17

Figure 4

1 Corona 2 High-voltage capacitance C1

3 Intermediate capacitance C2 4 Intermediate-voltage bushing

5 Secondary outgoing box 6 Connection board

7 Electromagnetic unit 8 Low-voltage bushing

9 Line terminal 10 Connection sheet

D Damp device N Carrier communication terminal

L Compensation reactor P Protection device

T Intermediate transformer XL Low-voltage terminal of compensation reactor




18

Figure 5

1 Corona 2 High-voltage capacitance C1

3 Intermediate capacitance C2 4 Intermediate-voltage bushing

5 Secondary outgoing box 6 Connection board

7 Electromagnetic unit 8 Low-voltage bushing

9 Line terminal 10 Connection sheet

D Damp device N Carrier communication terminal

L Compensation reactor P Protection device

T Intermediate transformer XL Low-voltage terminal of compensation reactor




19

Figure 6

1 Corona 2 High-voltage capacitance C1 3 Intermediate capacitance C2 4 Intermediate-voltage bushing 5 Secondary outgoing box 6 Connection board 7 Electromagnetic unit 8 Low-voltage bushing 9 Line terminal 10 Connection sheet D Damp device N Carrier communication terminal L Compensation reactor P Protection device T Intermediate transformer XL Low-voltage terminal of compensation reactor 1a1n Secondary 1a1n winding terminal 2a2n Secondary 2a2n winding terminal 3a3n Secondary 3a3n winding terminal dadn Residual voltage winding terminal

20

Figure 7 1 Corona 2 Line terminal 3 High-voltage capacitance C1 4 Intermediate capacitance C2 5 Low-voltage bushing 6 Pedestal 7 Intermediate-voltage bushing 8 Electromagnetic unit 9 Secondary outgoing box 10 Earthing board 11 Connection wire P Protection device L Compensation reactor T Intermediate transformer D Damp device N Carrier communication terminal A2 Primary voltage terminal of electromagnetic unit XL Low-voltage terminal of compensation reactor A1 Intermediate terminal of capacitor divider 1a1n Secondary 1a1n winding terminal 2a2n Secondary 2a2n winding terminal 3a3n Secondary 3a3n winding terminal dadn Residual voltage winding terminal

21

Figure 8 Schematic diagram of earthing switch handle position

Figure 9-1 Principle diagram Figure 9-2 Principle diagram

of C1 and tanδ measurement of C2 and tanδ measurement

Figure 9 Principle diagram of capacitance and tanδ anti-connection measurement of

auto anti-interference dielectric loss instrument

Figure 10-1 Principle diagram Figure 10-2 Principle diagram

of C1 and tanδ measurement of C2 and tanδ measurement

Figure 10 Principle diagram of capacitance and tanδ self-excitation measurement of


22

Figure 11-1 Principle diagram of capacitance C1 and tanδ self-excitation measurment of auto

anti-interference dielectric loss instrument

Figure 11-2 Principle diagram of capacitance C2 and tanδ self-excitation measurement of auto anti-interference dielectric loss instrument

Figure 11 Principle diagram of capacitance and tanδ self-excitation measurement of


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Instruction Manual of Capacitor Voltage Transformers