Surge Arrester

Your Professional Surge Arrester Supplier

Cowin Electrical Co., Ltd. is a leading enterprise specializing in the export and manufacturing of electrical products. Our comprehensive product range includes distribution switchgear control equipment, high and low voltage electrical appliances and accessories, dropout fuses, surge arresters, disconnectors, insulators, power fittings, hardware tools, wiring terminals, and distribution boxes.

Rich Experience
With over 15 years of extensive experience in production and export, we have established a solid reputation in the industry.

Custom Service
We offer OEM/ODM services to meet your specific requirements, ensuring that the final products align with your expectations.

Professional Team
Our team comprises experienced and skilled designers, including CAD and 3D design specialists, who possess the capability to deliver exceptional designs for your projects.

Quality Control
We have obtained ISO9001 quality management system certification and comply with international standards such as IEC 60099-4, IEC 61643-1, IEC 291, and IEC 282, issued by the International Electrotechnical Commission (IEC).

Specification of Surge Arrester

11kV

No.	DETAIL	UNITS	DATA
	Type		11kV gapless type metal oxide surge arrester - Distribution class
1.	Nominal system voltage	kV	11
2.	Highest system voltage	kV	12
3.	Basic Insulation Level (BIL)	kV	95
4.	Specification to which surge arrester complies		IEC 60099-4
5.	Rated voltage of surge arrester	kV	10
6.	Nominal, 8/20 µs, discharge current rating of surge arrester	kA	10
7.	Maximum continuous operating voltage of surge arrester	kV	7.3
8.	Gapless or gapped type metal-oxide surge arrester		Gapless
9.	Material of insulation		High temperature volcanised silicon rubber
10.	Rated frequency of surge arrester	Hz	50
11.	Design altitude of surge arrester (above sea level)	m	1 400m
12.	Design ambient temperature of surge arrester	O C	-1 to40
13.	Specific creepage distance of surge arrester	mm/kV	25
	Automatic earth lead disconnectors requirements
14.	Automatic earth lead disconnectors to be fitted	Yes/No	YES
15.	Corrosion protection of metal and alloy parts: galvanizing specification and/or stainless steel grade		To SABS 763, 316
	Tests
16.	Previous type test results/certificate to be provided with bid	Yes/No	Yes
17.	Routine test results/certificate to be provided on delivery	Yes/No	Yes
18.	Drawing showing dimensions of the arrestor to be provided with the bid	Yes/No	Yes
19.	Minimum one minute wet power frequency withstand voltage of external insulation of surge arrester housing	kV	28
20.	Maximum steep current impulse residual voltage for a 10 kA, 1/20 µs, discharge current	kV	50
21.	Maximum lightning impulse residual voltage for a 10 kA, 8/20 µs, discharge current	kV	40
22.	Lightning, 1, 2/50 µs, impulse withstand level of external insulation of surge arrester housing	kV	95
23.	Line discharge class rating		1
24.	Long duration current, 2 000 µs, impulse withstand	A	250 A
25.	High current, 4/10 µs, impulse withstand	kA	100 kA
26.	Automatic earth lead disconnector to be tested in accordance with IEC 60099-4	Yes/No	Yes

33kV

S/N	TECHNICAL DETAILS	UNITS	DATA
1.	Type		33kV gapless type metal oxide surge arrester - Distribution class
2.	Nominal system voltage	kV	33
3.	Highest system voltage	kV	36
4.	Power frequency	Hz	50
5.	Basic Insulation Level (BIL)	kV	170
6.	Specification to which surge arrester complies		IEC 60099
7.	Rated voltage of surge arrester	kV	29
8.	Nominal, 8/20 µs, discharge current rating of surge arrester	kA	10
9.	Maximum continuous operating voltage of surge arrester	kV	22
10.	Gapless or gapped type metal-oxide surge arrester		Gapless
11.	Insulation Material		Silicon rubber
12.	Cantilever strength of surge arrester	Nm	300
13.	Rated frequency of surge arrester	Hz	50
14.	Design altitude of surge arrester (above sea level)	m	1 400m
15.	Design ambient temperature of surge arrester	O C	-1 to 40
16.	Minimum phase-to-ground specific creepage distance of surge arrester	mm/kV	25
	Automatic earth lead disconnectors requirements
17.	Automatic earth lead disconnectors fitted	Yes/No	Yes
18.	Corrosion protection of metal and alloy parts: galvanizing specification and/or stainless steel grade		To SABS 763, 316
Tests
19.	Previous Type Test reports/certificate from recognized authority to be provided with bid	Yes/No	Yes
20.	Minimum one minute wet power frequency withstand voltage of external insulation of surge arrester housing	kV	70
21.	Maximum steep current impulse residual voltage for a 10 kA, 1/20 µs, discharge current	kV	99.7
22.	Maximum lightning impulse residual voltage for a 10 kA, 8/20 µs, discharge current	kV	91.8
23.	Lightning, 1, 2/50 µs, impulse withstand level of external insulation of surge arrester housing	kV	170
24.	Line discharge class rating	Class	1
25.	Long duration current, 2 000 µs, impulse withstand	A	250 A
26.	High current, 4/10 µs, impulse withstand	kA	100 kA
27.	Is the automatic earth lead disconnector tested in accordance with IEC 60099-4?	Yes/No	Yes

66kV

S/N	TECHNICAL DETAILS	UNITS	DATA
1.	Description		Station type lightning arrestor complete with steel support structures.
2.	Type		Zinc oxide gapless lightning arrestor
	System parameters
3.	Nominal system voltage	kV	66
4.	Highest system voltage	kV	72.5
5.	Power frequency	Hz	50
6.	Type of system earthing		Effective/Non effective
7.	Type of arrestor connection to system		Line to ground
8.	Rated voltage of surge arrester	kV rms	54
9.	Nominal, 8/20 µs, discharge current rating of surge arrester	kA peak	10
10.	Maximum continuous operating voltage of surge arrester	kV	43
11.	Minimum one minute wet power frequency withstand voltage of external insulation of surge arrester housing	kV rms	140
12.	Maximum steep current impulse residual voltage for a 2 kA, 30/60 µs, discharge current	kV peak	104
13.	Maximum lightning impulse residual voltage for a 10 kA, 8/20 µs, discharge current	kV peak	127
14.	Minimum lightning, 1,2/50 µs, impulse withstand level of external insulation of surge arrester housing		325
15.	Line discharge class rating		2
16.	Lighting arrestor counter, leakage current meter and their accessories to be provided	Yes/No	Yes
17.	Gapless or gapped type metal-oxide surge arrester		Gapless
18.	Insulation Material		Porcelain
19.	Cantilever strength of surge arrester	Nm	3000
20.	Rated frequency of surge arrester	Hz	50
21.	Maximum angle from vertical at which surge arrester is fully functional	Deg	45
22.	Design altitude of surge arrester (above sea level)	m	1400 m
23.	Design ambient temperature of surge arrester	O C	-1 to 40
24.	Humidity	%	85
25.	Specific phase-to-ground creepage of surge arrester	mm/kV	25
26.	Corrosion protection of metal and alloy parts: galvanizing specification and/or stainless steel grade		To SABS 763 or 316 stainless steel
27.	Previous type test results/certificate to be provided with bid	Yes/No	Yes
28.	Design drawings showing dimensions including foundations and brochures to be provided with bid	Yes/No	Yes
29.	Quality Assurance certification to be provided with the bid	Yes/No	Yes
30.	Routine test results/certificate to be provided on delivery	Yes/No	Yes
31.	Galvanized steel support structures complete with bolts & washers to be provided on delivery	Yes/No	Yes
32.	Applicable standard		IEC60099

Types of Surge Arrester

The surge arresters produced by our company mainly include the following types:

High Voltage Surge Arrester

This product is used in the exchange of 220KV and below power generation, transmission, substation, distribution systems, and systems for the internal operation of the lightning over-voltage amplitude is limited to a predetermined level, the whole system insulation system with basic equipment.

Electrical Arrester

The work product of nuclear components using zinc oxide-based multi-metal oxide powder firing, has excellent non-linear voltampere characteristic, steep wave fast response, high flow capacity. Yield gap product uses boast gap with irradiation equalizing structure, reducing the dis-change of dispersion, impact factor is small.

Earthing Arrester

Applications of Surge Arrester

Power Distribution Systems

Surge arresters are installed in substations and along power lines to protect transformers and other equipment from voltage surges.

Residential and Commercial Buildings

Used in electrical panels to protect household appliances, computers, and sensitive electronic devices from power surges.

Telecommunications

Protects communication lines and equipment from surges caused by lightning or electrical faults, ensuring uninterrupted service.

Industrial Equipment

Safeguards machinery and control systems in manufacturing plants from voltage spikes that could damage sensitive electronic components.

Renewable Energy Systems

In solar panel and wind turbine installations, surge arresters protect inverters and other electrical components from surges.

Transportation Systems

Used in railways and airports to protect signaling systems and electronic controls from voltage spikes.

Polymeric Housed Zinc Oxide Lightning Arresters

Surge Arrester Installation Steps

● Turn off the main power to the house at the electrical panel. Ensuring the power is off is crucial for safety.
● Remove the panel cover to access the circuit breakers. This step exposes the internal wiring, making it easier to implement the protection device.
● Identify an appropriate location for the surge protector, typically near the main power lines. Proper placement is key for efficiency.
● Install the surge protector according to manufacturer instructions. Following guidelines ensures the device works correctly.
● Connect the device to a dedicated circuit breaker. This step offers a direct line for surge management.
● Ensure proper grounding of the surge protector. Grounding is essential for safety.
● Replace the panel cover and restore power. Confirm that all systems are functioning correctly.

Customizable Options for Surge Arresters

● Voltage Rating
● Current Capacity
● Mounting Style
● Size
● Discharge Characteristic
● Material Composition
● Connector Type
● Environmental Protection Level

Packaging and Shipping

Packaging	Export standard package or special package as the requirement of customers.
Shipping	We will help you to choose the best shipping way according to your detail requirements. By sea, by air, or by express, etc.

FAQ

Q: What is the difference between a surge arrester and a surge protector?

A: Surge arresters protect electrical equipment, while surge protective devices generally protect secondary signal circuits or power supply circuits for electronic instruments and meters.

Q: How do I choose a surge arrester rating?

A: The arrester with the minimum rating is preferred because it provides the greatest margin of protection for the insulation. A higher-rated arrester is better able to survive on a power system but provides a lower protective margin for a specific insulation level.

Q: Why is a surge arrester important?

A: Surge arresters are used to protect high-voltage equipment in substations, such as transformers, circuit breakers and bushings, against the effects of lightning and switching surges. Surge arresters are connected close to, and in parallel, with the equipment to be protected.

Q: How long do surge protectors last?

A: Most surge protectors last between three to five years, but their effectiveness can diminish even sooner in environments with frequent electrical spikes or lightning strikes.

Q: What happens if a surge arrester fails?

A: Surge arrester failure can result in short circuits in houses. In most of the situations, a fault occurs because of dielectric breakdown once the internal structure of the system damages. So the arrester cannot resist the applied voltage like lightning, normal system voltage, switching surge overvoltage.

Q: What is the residual voltage of a surge arrester?

A: The residual voltage is the resulting voltage across the surge arresters when standard discharge currents are applied to it. Each type of transient overvoltage (fast-front, lightning, switching) is limited by the surge arresters.

We're professional surge arrester manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to buy high-grade surge arrester for sale here from our factory. Contact us for more details. jet parallel clamps, meter socket with disconnect, conventional lightning arrester