contents

6 ～ 500kV Metal Oxide Surge Arresters for Power Systems

Summary......................................................................................................................................................................
01
Execution Standards..........................................................................................................................................
02
Quality, Design and Service......................................................................................................................... 03
Type Instructions................................................................................................................................................... 05
Normal Operating Conditions.................................................................................................................... 06
Abnormal operating conditions................................................................................................................. 06
Main Specifications and Technical Parameters of 6 ～ 10kV Composite
Metal-oxide Surge Arresters........................................................................................................................ 07
Main Specifications and Technical Parameters of 35kV Composite Metal-
oxide Surge Arresters......................................................................................................................................... 08
Main Specifications and Technical Parameters of 110 ～ 220kV Composite
Metal-oxide Surge Arresters for Substation.................................................................................... 09
Main Specifications and Technical Parameters of 110 ～ 500kV Composite
without Gap Metal-oxide Surge Arresters for Transmission Line.................................. 11
Main Specifications and Technical Parameters of 110 ～ 500kV Composite
with Gap Metal-oxide Surge Arresters for Transmission Line.......................................... 13
Main Specifications and Technical Parameters of 35 ～ 500kV Porcelain
Metal-oxide Surge Arresters for Substation.................................................................................... 17
Main Specifications and Technical Parameters of 3 ～ 36kV Composite
Metal-oxide Surge Arresters for Outlet............................................................................................... 21
Main Specifications and Technical Parameters of 110 ～ 275kV Composite
Metal-oxide Surge Arresters for Outlet............................................................................................... 27
 Metal oxide surge arresters Metal oxide surge arresters

6 ～ 500kV Metal Oxide Surge Arresters for Power Systems

02 / Execution Standards
ZTT arresters design, manufacture in full compliance with GB11032, IEC60099-4 standards.

01 / Summary
In the process of production, transmission, distribution to the load terminal of electric energy equipment used for
generation- transmission - distribution is inevitably suffered overvoltage attack. No matter where such over-voltages
comes from, the atmosphere or the interior, damage or permanent damage to the equipment may occur, which result
in power interruption and substantial economic loss. It is necessary to take appropriate protective measures. At
present, metal-oxide surge arresters are recognized as the most excellent over-voltage protection devices on a global
scope. When atmospheric over-voltage or internal over-voltage occurs to the system, the core element of the arrester
- the zinc oxide arrester keeps its resistance value at a low level. The current of kilo-amperes flows into the earth
through the resistor sheet. The residual voltage pressure at both ends of the arrester is limited below the allowable
value, thereby providing a reliable protection for the insulation of the power equipment and cutting off power-flow
current; when the arrester is running under normal voltage, due to its excellent non-linear, its resistance will be high
and the current flowing through the arrester will be only a few hundred micro amps, which limit the power loss to a
minimum.

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 Metal oxide surge arresters Metal oxide surge arresters

03 / Quality, Design and Service 3.2 Safe and Reliable Design

● The package structure achieves the maximum mechanical
3.1 Superior Product Quality performance and electrical insulation reliability.
Integrated package structure makes the product core more
● Excellent performance of the core components--- Varistors.
rigid, even force of 1000N applied at the top, the product has no
With high quality raw materials and strict manufacturing process, varistors comprehensive performance reaches the
damage. The resistivity of the encapsulation material is as high as
domestic advanced level, especially the withstand capacity, high current impact and residual pressure voltage ratio
1013Ω.m, and it has strong insulation tolerance.
performance reach the leading domestic level.
● Design, development and application of new Nano-silicone
● To prevent moisture intrusion. rubber materials significantly improve the electrical insulation
The use of Durethan packaging materials or epoxy composite bushing fundamentally solves the problem of product and hydrophobic properties of the umbrella.
failure caused by moisture. Even in high-temperature environment where humidity reaches up to 90%, there will no The use of silicone rubber Nano-materials, achieve a further
failure occurred. improvement of the properties to resist ultraviolet, ozone, organic
● High-quality insulation to prevent external flashover. solvents and inorganic solvent, and the electrical corrosion class
Silicone rubber material is highly hydrophobic, it can prevent rainwater from forming continuous channels during use increases from 4.5 to 6. The use of Nano-materials enhances
and prevent the accumulation of any pollutants, which make the products corrosion-resistant and cut off the leakage rainwater agglomeration, making it extremely difficult to form a
current path. And the material's flame retardant and self-extinguishing performance can achieve a free-cleaning continuous water film, which is critical for coping with extreme

function product. weather (e.g. drizzle) flashover.

● Manufacturers have access to ISO9001 quality certification. ● New interface coupling technology to eliminate the possibility

● Products have passed independent third party laboratory type test. of product internal breakdown.
Repeated tests of Suitable coupling agent make the product’s
separation strength between the core and the silicone rubber
reaches up to at least 15kN / m, eliminating product internal
breakdown caused by interface problems.

● Product design using up to 3000m above sea level.

3.3 Worldwide Service Network

ZTT has more than 60 offices, sales
and service staff of more than 800
people over the world. In any place, you
will get service faster.

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 Metal oxide surge arresters Metal oxide surge arresters

05 / Normal Operating
Conditions
—Ambient temperature: ＋ 40℃～－ 40℃；
—Altitude: ≤ 1000m；
—Maximum wind speed: ≤ 35m/s；
—Maximum ice thickness:20mm；
—illumination intensity:0.1w/cm2；
— Mains frequency: 48Hz ～ 62Hz；

04 / Type Instructions —Seismic intensity: ≤ 7 degrees；

—Long-term power-frequency voltage is applied to surge arresters less

Additional feature code： than continuous operating voltage of surge arresters.

G- Plateau type S- Three-phase type

K-Seismic resistance type F- Explosion proof type
T- With disconnector type W- Anti-pollution type
Residual voltage of nominal discharge current （kV）

Rated voltage（kV）

Design No.

Occasions: Z- Substation S - Power distribution 06 / Abnormal operating

R - Protective Capacitor banks T - Electric railway
D - Motors F-GIS Combined Electrical Apparatus conditions
In abnormal operating conditions, the selection, design, use of surge
arresters should be customized. ZTT can customize for you, please
Structural feature：W- Without gap C-Gap
contact us.

Nominal discharge current （kA）

Type：Y- Ceramic Shell YH- Composite Shell

e.g.：YH5WS-17/50T means this product for composite metal oxide surge arrester of distribution type,
nominal discharge current: 5kA，rated voltage: 17kV, residual voltage less than: 50kV, with disconnector.

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 Metal oxide surge arresters Metal oxide surge arresters

07 / Main Specifications and Technical Parameters of 6 ～ 10kV 08 / Main Specifications and Technical Parameters of 35kV
Composite Metal-oxide Surge Arresters Composite Metal-oxide Surge Arresters
System voltage level 10kV 6kV System voltage level 35kV

Type YH5WZ-17/45 YH5WS-17/50 YH5WX-17/50 YH5WR-17/46 YH2.5WD-12/30 YH5WZ-10/27 YH5WD-8/18.7 YH5WR-10/27 Type YH5WZ-51/125 YH5WZ-51/134 YH5WZ-54/142 YH5WR-51/134 YH1.5W-30/80 YH1.5W-33/90 YH5WT-42/120

Rated voltage UR（kV） 17 17 17 17 12 10 8 10 Rated voltage UR（kV） 51 51 54 51 30 33 42

Continuous operating voltage Uc（kV） 13.6 13.6 13.6 13.6 9.6 8.0 6.3 8 Continuous operating voltage Uc（kV） 40.8 40.8 43.2 40.8 24 26.4 34

1mA DC reference voltage U1mA（kV） 24 25 25 25 15 15.2 12 14.4 1mA DC reference voltage U1mA（kV） 73 73 77 73 44 49 65

Nominal discharge current（kA） 5 5 5 5 2.5 5 5 5 Nominal discharge current（kA） 5 5 5 5 1.5 1.5 5

Steep current impulse residual voltage（kV） 51.8 57.5 57.5 / 34.6 31 21.5 / Steep current impulse residual voltage（kV） 145 154 163 154 / / 138
Electric Electric
parameters parameters
Lightning impulse residual voltage（kV） 45 50 50 46 30 27 18.7 27 Lightning impulse residual voltage（kV） 125 134 142 134 80 90 120

Switching impulse residual voltage（kV） 38.3 42.5 42.5 35 23 23 15 21 Switching impulse residual voltage（kV） 106 114 121 114 75 84 98

Square wave impulse withstand Current（A） 150 150 150 600 400 150 600 600 Square wave impulse withstand Current（A） 400 400 400 600 600 600 600

High Current impulse withstand Current（kA） 65 65 65 100 65 65 100 100 High Current impulse withstand Current（kA） 100 100 100 100 100 100 100

Pollution class Ⅳ Ⅳ Ⅳ Ⅳ Ⅳ / / Ⅳ Pollution class Ⅳ Ⅳ Ⅳ Ⅳ / / Ⅳ

Overall height H（mm） 252 252 252 240 240 252 240 240 Overall height H（mm） 684 684 684 684 684 684 684

Cree-page distance（mm） 405 405 405 390 390 405 390 390 Cree-page distance（mm） 1400 1400 1400 1400 1400 1400 1400
Structural Structural
Shed diameter Φ（mm） 100 100 100 120 120 100 120 120 Shed diameter Φ（mm） 162 162 162 162 162 162 162
parameters parameters
Weight （kg） 1.3 1.3 1.3 1.7 1.7 1.3 1.7 1.7 Weight （kg） 13 13 13 13 13 13 13

Outline Drawing Fig1 Fig1 Fig1 Fig1 Fig1 Fig1 Fig1 Fig1 Outline Drawing Fig2 Fig2 Fig2 Fig2 Fig2 Fig2 Fig2
Power
Capacitor
Protected object Substation transmission and Substation Capacitor bank Motors Substation Motors Protected object Substation Substation Substation Capacitor bank Neutral point Neutral point Electric railway
bank
distribution

through-hole

— Fig1 — — Fig2 —

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 Metal oxide surge arresters Metal oxide surge arresters

09 / Main Specifications and Technical Parameters of 110 ～ 220kV

Composite Metal-oxide Surge Arresters for Substation.

System voltage level 110kV 220kV

Type YH10WZ-100/260 YH10WZ-102/266 YH10WZ-108/281 YH10WZ-204/532 YH10WZ-216/562

Rated voltage UR（kV） 100 102 108 204 216

Continuous operating voltage Uc（kV） 80 81.6 86.4 163.2 172.8

1mA DC reference voltage U1mA（kV） 153 155 164 310 328

Nominal discharge current（kA） 10 10 10 10 10

Steep current impulse residual voltage（kV） 291 297 314 594 628 — Fig3 —
Electric
parameters
Lightning impulse residual voltage（kV） 260 266 281 532 562

Switching impulse residual voltage（kV） 221 225 239 451 477

Square wave impulse withstand Current（A） 600/800 600/800 600/800 600/800 600/800

High Current impulse withstand Current（kA） 100 100 100 100 100

Pollution class Ⅳ Ⅳ Ⅳ Ⅳ Ⅳ

Overall height H（mm） 1305 1305 1305 2523 2523

Cree-page distance（mm） 4035 4035 4035 8070 8070

Structural
Shed diameter Φ（mm） 214 214 214 214 214
parameters

Weight （kg） 47 47 48 97 102

Outline Drawing Fig 3 Fig 3 Fig 3 Fig 4 Fig 4

Protected object Substation Substation Substation Substation Substation

— Fig4 —

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 Metal oxide surge arresters Metal oxide surge arresters

10 / Main Specifications and Technical Parameters of 110 ～ 500kV Designated size of coupling:16

Designated size of coupling:16

Composite without Gap Metal-oxide Surge Arresters for Transmission

Line
System voltage level 110kV 220kV 330kV 500kV

Type YH10WX-96/250 YH10WX-108/266 YH10WX-192/500 YH10WX-216/562 YH10WX-312/760 YH20WX-444/1106 YH20WX-468/1166

Rated voltage UR（kV） 96 108 192 216 312 444 468

Continuous operating voltage Uc（kV） 75 84 153.6 168.5 237 324 330

1mA DC reference voltage U1mA（kV） 140 157 292 314 442 597 630

Nominal discharge current（kA） 10 10 10 10 10 20 20

Steep current impulse residual voltage（kV） 288 315 560 630 847 1238 1306
Electric
parameters
Lightning impulse residual voltage（kV） 250 281 500 562 760 1106 1166 — Fig5 — — Fig6 —

Designated size of coupling:16

Designated size of coupling:16
Switching impulse residual voltage（kV） 213 239 424 630 643 907 956

Square wave impulse withstand Current（A） 600 600 600/800 600/800 800/1000 1200/1800 1200/1800

High Current impulse withstand Current（kA） 100 100 100 100 100 100 100

Pollution class Ⅳ Ⅳ Ⅳ Ⅳ Ⅳ Ⅳ Ⅳ

Overall height H（mm） 1256 1256 2588 2588 2931 4307 4307

Cree-page distance（mm） 3946 3946 8070 8070 11526 17289 17289

Structural
Shed diameter Φ（mm） 195 195 214 214 252 252 252
parameters

Weight （kg） 26 27 47 48 113 170 167

Outline Drawing Fig 5 Fig 5 Fig 6 Fig 6 Fig 7 Fig 8 Fig 8

Designated size of coupling:16

Designated size of coupling:16

Protected object Transmission line Transmission line Transmission line Transmission line Transmission line Transmission line Transmission line
— Fig7 — — Fig8 —

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 Metal oxide surge arresters Metal oxide surge arresters

11 / Main Specifications and Technical Parameters of 110 ～ 500kV

Composite with Gap Metal-oxide Surge Arresters for Transmission Designated size of coupling:16

Line
System voltage level 110kV 220kV 330kV 500kV

Type YH10CX-102/296 YH10CX-108/320 YH10CX-192/560 YH10CX-204/592 YH10CX-288/775 YH20CX-396/1050

Rated voltage UR（kV） 102 108 192 204 288 396

1mA DC reference voltage U1mA（kV） 148 160 280 296 408 561

Nominal discharge current（kA） 10 10 10 10 10 20

Steep current impulse residual voltage（kV） 331 358 628 662 817 1171

Electric
Lightning impulse residual voltage（kV） 296 320 560 592 775 1050
parameters

Square wave impulse withstand Current（A） 500/600 500/600 600/800 600/800 800/1200 1200/1800

High Current impulse withstand Current（kA） 100 100 100 100 100 100

Power-frequency discharge voltage (kV) 185 185 370 370 510 567

impulse discharge voltage (kV) 525 525 900 900 1300 1760

Overall height H（mm） 1256 1256 3783 3783 4757 6971

Cree-page distance（mm） 3946 3946 8018 8018 11526 17289

Structural
Shed diameter Φ（mm） 195 195 195 195 252 252
parameters Designated size of coupling:16

Weight （kg） 31 33 57 59 105 152

— Fig9 —
Outline Drawing Fig 9 Fig 9 Fig 10 Fig 10 Fig 11 Fig 12

Protected object Transmission line Transmission line Transmission line Transmission line Transmission line Transmission line

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 Metal oxide surge arresters Metal oxide surge arresters

Designated size of coupling:16 Designated size of coupling:16

Designated size of coupling:16

Designated size of coupling:16

Designated size of coupling:16 Designated size of coupling:16

— Fig10 — — Fig11 — — Fig12 —

15 16
 Metal oxide surge arresters Metal oxide surge arresters

12 / Main Specifications and Technical Parameters of 35 ～ 500kV

Porcelain Metal-oxide Surge Arresters for Substation
System voltage level 35kV 110kV 220kV 330kV 500kV

Type Y5WZ-51/134 Y10WZ-102/266 Y10WZ-108/266 Y10WZ-192/500 Y10WZ-216/562 Y10WZ-312/760 Y20WZ-444/1015 Y20WZ-468/1070

Rated voltage UR（kV） 51 102 108 204 216 312 444 468

Continuous operating voltage Uc（kV） 40.8 81.6 86.4 163.2 172.8 237 324 330

1mA DC reference voltage U1mA（kV） 75 155 164 310 328 442 597 630

Nominal discharge current（kA） 5 10 10 10 10 10 20 20

Steep current impulse residual voltage（kV） 154 297 314 594 628 847 1137 1198 — Fig13 —
Electric
parameters
Lightning impulse residual voltage（kV） 134 266 281 532 562 760 1015 1070

Switching impulse residual voltage（kV） 114 225 239 451 477 643 900 950

Square wave impulse withstand Current（A） 400 600/800 600/800 600/800 600/800 1000/1200 2000 2000

High Current impulse withstand Current（kA） 65 100 100 100 100 100 100 100

Pollution class Ⅳ Ⅳ Ⅳ Ⅳ Ⅳ Ⅳ Ⅳ Ⅳ

Overall height H（mm） 1007 1821 1821 3283 3283 3780 5850 5850

Cree-page distance（mm） 1285 3976 3976 7952 7952 11400 17300 17300

Structural
Shed diameter Φ（mm） 220 300 300 300 300 300 480 480
parameters

Weight （kg） 64 200 203 384 386 575 1850 1850

Outline Drawing Fig 13 Fig 14 Fig 14 Fig 15 Fig 15 Fig 15 Fig 16 Fig 16

Protected object Substation Substation Substation Substation Substation Substation Substation Substation

— Fig14 —

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 Metal oxide surge arresters Metal oxide surge arresters

860
1490

125

45 45 17.5

17.5

45

150
45
9× 18

terminal
接线盖板
plate cover plat
H
333

333

装监测器用
2× 15
To install the monitor
4× 30
— Fig15 — — Fig16 —

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 Metal oxide surge arresters Metal oxide surge arresters

13 / Main Specifications and Technical Parameters of 3 ～ 36kV

Composite Metal-oxide Surge Arresters for Outlet
Continuous operating Steep current impulse Lightning current switching current Rectangular current High Current impulse
Rated voltage
voltage residual voltage impulse residual voltage impulse residual voltage impulse withstand withstand
Type Outline Drawing

kV（r.m.s） kV ≤ A kA

HY5W-3 3 2.55 11.3 9 8.9 150 65 Fig 17

HY5W-6 6 5.1 22.6 18 16.8 150 65 Fig 18

HY5W-9 9 7.65 33.7 27 23.8 150 65 Fig 19

HY5W-10 10 8.4 36 30 26.4 150 65 Fig 19 —Fig17 —

HY5W-11 11 9.4 40 33 30 150 65 Fig 20

HY5W-12 12 10.2 42.2 36 31.7 150 65 Fig 20

HY5W-15 15 12.7 51 45 38.5 150 65 Fig 21

HY5W-18 18 15.3 61.5 54 46.2 150 65 Fig 22

HY5W-21 21 17.0 71.8 63 54.2 150 65 Fig 23

HY5W-24 24 19.5 82 72 62 150 65 Fig 24

HY5W-27 27 22.0 92 81 69.8 150 65 Fig 25

HY5W-30 30 24.4 102 90 79 150 65 Fig 26

HY5W-33 33 27.5 112 99 86.7 150 65 Fig 27

HY5W-36 36 29.0 123 108 92.4 250 65 Fig 28

HY10W-3 3 2.55 11.3 9 8.9 250 100 Fig 17

—Fig18 —
HY10W-6 6 5.1 22.6 18 16.8 250 100 Fig 18

HY10W-9 9 7.65 33.7 27 23.8 250 100 Fig 19

HY10W-10 10 8.4 36 30 26.4 250 100 Fig 19

HY10W-11 11 9.4 40 33 30 250 100 Fig 20

HY10W-12 12 10.2 42.2 36 31.7 250 100 Fig 20

HY10W-15 15 12.7 51 45 38.5 300 100 Fig 21

HY10W-18 18 15.3 61.5 54 46.2 300 100 Fig 22

HY10W-21 21 17.0 71.8 63 54.2 300 100 Fig 23

HY10W-24 24 19.5 82 72 62 300 100 Fig 24

HY10W-27 27 22.0 92 81 69.8 300 100 Fig 25

HY10W-30 30 24.4 102 90 79 300 100 Fig 26

HY10W-33 33 27.5 112 99 86.7 300 100 Fig 27

HY10W-36 36 29.0 123 108 92.4 300 100 Fig 28

— Fig19 —

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 Metal oxide surge arresters Metal oxide surge arresters

— Fig20 —

— Fig23 —

— Fig21 —

— Fig22 — — Fig24 —

23 24
 Metal oxide surge arresters Metal oxide surge arresters

— Fig25 — — Fig27 —

— Fig26 — — Fig28 —

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 Metal oxide surge arresters Metal oxide surge arresters

14 /Main Specifications and Technical Parameters of 110 ～ 275kV

Composite Metal-oxide Surge Arresters for Outlet
System voltage level 110kV 132kV 154kV 220kV 275kV

Type YH10WZ-96/256 YH10W-120/296 YH10WZ-144/374 YH10WZ-192/466 YH10WZ-242/620

Rated voltage UR（kV） 96 120 144 192 242

Continuous operating voltage Uc（kV） 75 96 108 154 194

Nominal discharge current（kA） 10 10 10 10 10

Steep current impulse residual voltage（kV） 296 365 410 504 670

Electric
Lightning impulse residual voltage（kV） 256 315 374 460 620
parameters

Switching impulse residual voltage（kV） 225 275 309 375 530

Square wave impulse withstand Current（A） 600 800 600/800 1000 1200/1500

High Current impulse withstand Current（kA） 100 100 100 100 100

Pollution class Ⅳ Ⅳ Ⅳ Ⅳ Ⅳ

Overall height H（mm） 1277 1277 1277 2523 2895

Cree-page distance（mm） 4000 4000 4000 7952 8066

Structural
Shed diameter Φ（mm） 226 226 226 214 252
parameters 4Xø13through-hole EQS

4Xø17through-hole EQS

Weight （kg） 30 35 40 70 90

Outline Drawing Fig 29 Fig 29 Fig 29 Fig 30 Fig 31

Protected object Substation Substation Substation Substation Substation — Fig29 — — Fig30 — — Fig31 —

27 28