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ACThree-phase combined overvoltage protector

The modular composite-housing overvoltage protectors are a new series of overvoltage protection devices jointly developed by our company and technical personnel from relevant research institutes. This series comprises two types: gapless models and models with series gaps, both of which effectively limit phase-to-ground and phase-to-phase overvoltages, thereby protecting the insulation of electrical equipment from damage caused by such overvoltages. The products in this series feature well-balanced and reliable performance, with protection levels that meet or exceed the requirements of GB 11032 “AC Gapless Metal Oxide Surge Arresters,” JB/T 8952 “Composite-Housing Gapless Metal Oxide Surge Arresters for 35 kV and Below,” and JB/T 9672.2 “AC Metal Oxide Surge Arresters with Series Gaps.” Furthermore, they have successfully passed comprehensive testing at the National Insulator and Surge Arrester Quality Supervision, Inspection, and Testing Center. These protectors are widely applicable to power supply and distribution systems in industries such as power generation, petrochemicals, railways, coal mining, metallurgy, construction, and light industry and textile manufacturing.
Category: Lightning Arrester Series
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Product Overview

The modular composite-housing overvoltage protectors are a new series of overvoltage protection devices jointly developed by our company and technical personnel from relevant research institutes. This series comprises two types: gapless models and models with series gaps, both of which effectively limit phase-to-ground and phase-to-phase overvoltages, thereby protecting the insulation of electrical equipment from damage caused by such overvoltages. The products in this series feature well-balanced and reliable performance, with protection levels that meet or exceed the requirements of GB 11032 “AC Gapless Metal Oxide Surge Arresters,” JB/T 8952 “Composite-Housing Gapless Metal Oxide Surge Arresters for 35 kV and Below,” and JB/T 9672.2 “AC Metal Oxide Surge Arresters with Series Gaps.” Furthermore, they have successfully passed comprehensive testing at the National Insulator and Surge Arrester Quality Supervision, Inspection, and Testing Center. These protectors are widely applicable to power supply and distribution systems in industries such as power generation, petrochemicals, railways, coal mining, metallurgy, construction, and light industry and textile manufacturing.

Working conditions

● Suitable for both indoor and outdoor use; 
● Ambient temperature: -40°C to +40°C; 
● Altitude not exceeding 3,000 m; 
● Power supply frequency shall be no less than 48 Hz and no more than 62 Hz; 
● The power-frequency voltage continuously applied across the protector terminals shall not exceed the protector’s continuous operating voltage; 
● Areas with seismic intensity of 7 or less; 
● Maximum wind speed shall not exceed 35 m/s; 
● Areas with heavy pollution and below.

Implementation Standard

GB/T11032

Technical Specifications

Gapless Combined Overvoltage Protector

Product Type

Product Model

System rated 
Voltage (with 
Effective value) kV

Protective device rated current 
Voltage (RMS) 
kv

Protector 
Continuous action 
Voltage (with 
Effective value) kV

Wiring method

DC 1 mA 
Reference voltage 
xKv

Nominal fault current 
Residue under current 
Pressure (peak) 
kv

Operational impact 
Residual voltage of current 
(Peak) 
>kv

2 ms square wave 
Through-flow capacity 
A

Leak 
Current 
≤uA

Motor type

For electric motors

FHW-3D

3

4

3.5

Phase-to-phase

7.0

11.6

9.4

200

50

Phase-to-ground

5.7

9.5

7.6

FHW-6D

6

8

6.9

Phase-to-phase

14

23.3

18.7

200

50

Phase-to-ground

11.2

18.7

15.0

FHW-10D

10

13.5

11.5

Phase-to-phase

23.2

38.7

31.0

200

50

Phase-to-ground

18.6

31

25.0

For generators

FHW-3F

3

4

3.2

Phase-to-phase

7.0

11.6

9.4

400

50

Phase-to-ground

5.7

9.5

7.6

FHW-6F

6

8

6.3

Phase-to-phase

14.0

23.3

18.7

400

50

Phase-to-ground

11.2

18.7

15.0

FHW-10F

10

13.5

10.5

Phase-to-phase

23.2

38.7

31.0

400

50

Phase-to-ground

18.6

31.0

25.0

Power plant type

FHW-3Z

3

5

4.0

Phase-to-phase

7.5

13.5

11.5

150

50

Phase-to-ground

7.2

FHW-6Z

6

8

6.3

Phase-to-phase

15.0

27.0

23.0

150

50

Phase-to-ground

14.4

FHW-10Z

10

17

13.8

Phase-to-phase

25.0

45

38.3

150

50

Phase-to-ground

24.0

FHW-35Z

35

51

40.8

Phase-to-phase

84.0

150.0

134.0

150

50

Phase-to-ground

73.0

134.0

114.0

Parallel compensation 
For capacitors

FHW-3R

3.0

5.0

4.0

Phase-to-phase

8.0

13.5

11.5

400

50

Phase-to-ground

7.2

FHW-6R

6.0

10.0

8.0

Phase-to-phase

15.0

27.0

23.0

400

50

Phase-to-ground

14.0

FHW-10R

10.0

17.0

13.6

Phase-to-phase

25.0

45.0

38.3

400

50

Phase-to-ground

24.0

FHW-35R

35.0

51.0

40.8

Phase-to-phase

86.0

150.0

134.0

400

50

Phase-to-ground

73.0

134.0

114.0

 

Series-gap composite overvoltage protector

produce 
product 
Class 
type

Protect 
protect 
to 
Elephant

Product Model

System limit 
Fixed voltage

Protector 
Rated voltage 
pressure

Power-frequency discharge 
Electric voltage 
x kv

1.2/50 
Impact release 
Electric voltage

Wavefront Impact 
Discharging 
Wavefront steepness 
kv/us

Wavefront冲 
Impact discharge 
Voltage

Steep wave surge 
Impact current 
Residual voltage

5kV lightning 
Electrical shock 
Residual current 
pressure

500A
Operation flush 
Impact current 
Residual voltage

2ms
Square Wave Pass 
Flow capacity 
≥A

Leak 
Electric current 
≤uA

Effective value kv

Peak < kV

Electricity 
machine 
type

Electric 
Machine issuance 
Motor

FHC-3D

3.15

3.8

7.5

9.5

22.5

11.7

10.7

9.5

7.6

300

30

FHC-6D

6.3

7.6

15.0

18.7

45.0

23.4

21.0

18.7

15.0

400

30

FHC-10D

10.5

12.7

25.0

31.0

75.0

38.8

34.7

31.0

25.0

400

30

Electricity 
station 
type

Voltage transformation 
True instrument 
Circuit breaker 
Guan Mu 
line

FHC-3Z

3.0

3.8

8.0

12.0

31.5

15.0

13.5

12.0

10.2

300

30

FHC-6Z

6.0

7.6

16.0

24.0

63.0

30.0

27.0

24.0

20.4

400

30

FHC-10Z

10.0

12.7

26.0

41.0

106.0

51.0

46.0

41.0

35.0

400

30

FHC-35Z

35.0

42

80

124

343

155

139

124

105.4

400

30

Electricity 
Allow 
type

Compensation 
Capacitor 
instrument

FHC-3R

3.0

3.8

8.0

12

31.5

15

13.5

12

10.2

400

30

FHC-6R

6.0

7.6

16

24

63

30

27

24

20.4

600

30

FHC-10R

10

12.7

26

41

106

51

46

41

35

600

30

FHC-35R

35

42

80

124

343

155

139

124

105.4

600

30

Outline Dimension Drawing (mm)

10 kV AC Three-Phase Combined Overvoltage Protector

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