Oxide Zinc Resistor Surge Arrester for Overhead Line Protection

Haivo's oxide zinc resistor surge arresters provide dedicated overhead line protection with advanced non-linear volt-ampere characteristics. During normal operation, leakage current remains at microampere levels; during overvoltage events, resistance drops instantaneously to discharge surge energy. The gapless design eliminates traditional discharge gap failures, while polymer housings provide excellent pollution and UV resistance for demanding outdoor environments.

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Product Description

Zinc oxide surge arresters are overvoltage protection devices designed for overhead power transmission and distribution systems. These devices leverage the non-linear volt-ampere characteristics of zinc oxide to regulate voltage levels across electrical networks. Under standard operating voltage, the current passing through the arrester remains at microampere or milliampere levels with minimal power loss; when overvoltage events such as lightning surges or switching surges occur, the resistance of the zinc oxide element drops sharply to discharge excess energy and protect connected line equipment. Unlike traditional surge arresters that rely on discharge gaps, these gapless models use the inherent non-linear properties of zinc oxide to handle discharge and current interruption directly, eliminating gap-related failure points. This product line is available with two housing material options, supporting a rated voltage range from 0.22kV to 500kV for porcelain-housed units and 0.22kV to 220kV for polymer-housed units. For industrial clients and commercial procurement teams working on overhead line construction and power grid upgrade projects, these devices reduce equipment damage risks and lower long-term maintenance costs.

Core Features of Metal Oxide Surge Arresters

Housing Material Options

Two housing configurations are available to accommodate different installation environments and project requirements. Silicone polymer housing models feature reduced overall weight and enhanced pollution resistance, making them suitable for outdoor overhead line deployments in areas with moderate to heavy environmental contaminants such as dust, industrial emissions, or coastal salt spray. Porcelain housing models deliver robust mechanical strength and weathering resistance for installations requiring higher structural durability and longer service life under harsh outdoor conditions. Both housing designs are paired with gapless metal oxide resistor cores to deliver consistent overvoltage protection performance.

Structural Performance Characteristics

These surge arresters support straightforward installation and routine maintenance procedures, reducing on-site construction time and long-term upkeep costs for power engineering projects. The housing structure incorporates a precision-sealed design to prevent moisture and dust ingress, which is critical for stable long-term performance in regions with high humidity, frequent temperature swings, or dusty environments. The gapless structural design eliminates the risk of performance degradation caused by gap erosion or misalignment, supporting consistent protection performance of the device. The internal zinc oxide resistor element is formulated to maintain stable non-linear electrical characteristics across extended service cycles, delivering steady protection output over time.

Standard Operating Conditions for Overhead Line Surge Arresters

All models in this product line are engineered to operate within defined environmental and electrical parameters. These specifications outline the acceptable operating boundaries to maintain consistent device performance and service life. Procurement and engineering teams should verify these conditions against on-site project parameters to ensure appropriate model selection and stable long-term operation:

Ambient air temperature: -40℃ - +40℃

Altitude: <=2000m

System frequency: 48Hz - 62Hz

Power frequency voltage applied across arrester terminals must not exceed the continuous operating voltage of the surge arrester

Earthquake intensity: less than 8 degree

Maximum wind speed: 35m/s

Technical Specifications of Gapless Zinc Oxide Surge Arresters

The product range is categorized by nominal discharge current and housing material to align with different system protection grades and application scenarios. Each series covers multiple voltage grades to match common overhead line voltage standards, allowing project teams to select models that precisely fit their system design and protection requirements. All parameters listed below correspond to factory test specifications with consistent production standards.

1. Metal Oxide Polymer Housing (Gapless) Type Surge Arrester for A.C System (5kA Series)

Model	Rated voltage (kVr.m.s)	Continuous operating Voltage(KVr.m.s）	Lightning impulse residual voltage under nominal discharge current (<=KVp)	Line discharge class	Creepage distance(mm)	2ms square wave impulse current withstands(A)	4/10μhigh current impulse Withstands(KAp)
YH-5W-6	6	5.1	18		320	150	65
YH-5W-9	9	7.65	27		430	150	65
YH-5W-12	12	10.2	36		430	150	65
YH-5W-15	15	12.75	45		530	150	65
YH-5W-18	18	15.3	54		530	150	65
YH-5W-21	21	16.8	63		640	150	65
YH-5W-24	24	19.2	72		640	150	65
YH-5W-27	27	21.6	81		740	150	65
YH-5W-30	30	24	90		890	150	65
YH-5W-33	33	26.4	99		890	150	65
YH-5W-36	36	28.8	108		1115	150	65

2. Metal Oxide Polymer Housing (Gapless) Type Surge Arrester for A.C. System (10kA Series)

Model	Rated voltage (kVr.m.s)	Continuous operating Voltage(KVr.m.s）	Lightning impulse residual voltage under nominal discharge current (<=KVp)	Line discharge class	Creepage distance(mm)	2ms square wave impulse current withstands(A)	4/10μhigh current impulse Withstands(KAp)
YH-10W-6	6	5.1	18	1	320	250	100
YH-10W-9	9	7.65	27	1	430	250	100
YH-10W-12	12	10.2	36	1	430	250	100
YH-10W-15	15	12.75	45	1	530	250	100
YH-10W-18	18	15.3	54	1	530	250	100
YH-10W-21	21	16.8	63	1	640	250	100
YH-10W-24	24	19.2	72	1	740	250	100
YH-10W-27	27	21.6	81	1	740	250	100
YH-10W-30	30	24	90	1	890	250	100
YH-10W-33	33	26.4	99	1	890	250	100
YH-10W-36	36	28.8	108	1	1115	250	100
YH-10W-42	42	33.6	126	2	1260	400	100
YH-10W-48	48	39	139	2	1260	400	100
YH-10W-54	54	42	160	2	1260	400	100
YH-10W-60	60	48	178	2	1465	400	100
YH-10W-66	66	52.8	196	2	1465	400	100
YH-10W-72	72	57	214	2	2255	400	100
YH-10W-84	84	67.2	244	2	2255	400	100
YH-10W-90	90	72.5	249	2	2255	400	100
YH-10W-96	96	75	265	3	3555	800	100
YH-10W-108	108	84	281	3	3555	800	100
YH-10W-120	120	96	300	3	4153	800	100
YH-10W-150	150	120	416	3	5040	800	100
YH-10W-200	200	156	520	3	7110	800	100

3. Metal Oxide Polymer Housing (Gapless) Type Surge Arrester for A.C. System (20kA Series)

Model	Rated voltage (kVr.m.s)	Continuous operating Voltage(KVr.m.s）	Lightning impulse residual voltage under nominal discharge current (<=KVp)	Line discharge class	Creepage distance(mm)	2ms square wave impulse current withstands(A)	4/10μhigh current impulse Withstands(KAp)
YH-20W-108	108	84	281	3	3555	800	100
YH-20W-120	120	96	300	3	4153	800	100
YH-20W-150	150	120	416	3	5040	800	100
YH-20W-200	200	156	520	3	7110	800	100

4. Metal Oxide Porcelain Housing (Gapless) Type Surge Arrester for A.C. System (5kA Series)

Model	Rated voltage (kVr.m.s)	Continuous operating Voltage(KVr.m.s）	Lightning impulse residual voltage under nominal discharge current (<=KVp)	Line discharge class	Creepage distance(mm)	2ms square wave impulse current withstands(A)	4/10μhigh current impulse Withstands(KAp)
Y5W-6	6	5.1	18		280	150	65
Y5W-9	9	7.65	27		320	150	65
Y5W-12	12	10.2	36		320	150	65
Y5W-15	15	12.75	45		450	150	65
Y5W-18	18	15.3	54		450	150	65
Y5W-21	21	16.8	63		450	150	65
Y5W-24	24	19.2	72		510	150	65
Y5W-27	27	21.6	81		510	150	65
Y5W-30	30	24	90		890	150	65
Y5W-33	33	26.4	99		890	150	65
Y5W-36	36	28.8	108		890	150	65

5. Metal Oxide Polymer Housing (Gapless) Type Surge Arrester for A.C. System (10kA Series)

Model	Rated voltage (kVr.m.s)	Continuous operating Voltage(KVr.m.s）	Lightning impulse residual voltage under nominal discharge current (<=KVp)	Line discharge class	Creepage distance(mm)	2ms square wave impulse current withstands(A)	4/10μhigh current impulse Withstands(KAp)
Y10W-6	6	5.1	18	1	280	250	100
Y10W-9	9	7.65	27	1	320	250	100
Y10W-12	12	10.2	36	1	320	250	100
Y10W-15	15	12.75	45	1	450	250	100
Y10W-18	18	15.3	54	1	450	250	100
Y10W-21	21	16.8	63	1	450	250	100
Y10W-24	24	19.2	72	1	510	250	100
Y10W-27	27	21.6	81	1	510	250	100
Y10W-30	30	24	90	1	890	250	100
Y10W-33	33	26.4	99	1	890	250	100
Y10W-36	36	28.8	108	1	890	250	100
Y10W-42	42	33.6	126	2	1256	400	100
Y10W-48	48	39	139	2	1256	400	100
Y10W-54	54	42	160	2	1256	400	100
Y10W-60	60	48	178	2	1440	400	100
Y10W-66	66	52.8	196	2	1440	400	100
Y10W-72	72	57	214	2	1440	400	100
Y10W-84	84	67.2	244	2	2200	400	100
Y10W-90	90	72.5	249	2	2200	400	100
Y10W-96	96	75	265	3	3350	800	100
Y10W-108	108	84	281	3	3350	800	100
Y10W-120	120	96	300	3	3948	800	100
Y10W-150	150	120	416	3	4400	800	100
Y10W-200	200	156	520	3	6700	800	100

6. Metal Oxide Polymer Housing (Gapless) Type Surge Arrester for A.C. System (20kA Series)

Model	Rated voltage (kVr.m.s)	Continuous operating Voltage(KVr.m.s）	Lightning impulse residual voltage under nominal discharge current (<=KVp)	Line discharge class	Creepage distance(mm)	2ms square wave impulse current withstands(A)	4/10μhigh current impulse Withstands(KAp)
Y20W-108	108	84	281	3	3555	800	100
Y20W-120	120	96	300	3	4106	800	100
Y20W-150	150	120	416	3	4400	800	100
Y20W-200	200	156	520	3	6700	800	100
Y20W-444	444	324	1106	4	17052	2000	100

FAQ About Zinc Oxide Surge Arresters

What systems are these gapless surge arresters designed for?

These surge arresters are purpose-built for overvoltage protection in AC power transmission and distribution systems, with a primary focus on overhead line installations. They are suitable for commercial procurement in power grid construction, industrial facility power distribution, outdoor electrical infrastructure upgrades, and rural power network projects. All models are compatible with AC systems operating at frequencies between 48Hz and 62Hz, covering most standard power network configurations worldwide.

How to choose the right surge arrester model for overhead line projects?

First, confirm the rated voltage of your overhead line system, and select an arrester model with a rated voltage and continuous operating voltage that matches or exceeds the system’s maximum operating voltage. Second, choose the nominal discharge current grade (5kA, 10kA, 20kA) based on the local lightning activity level, system importance, and required protection level. Finally, select between polymer and porcelain housing based on the installation site’s environmental conditions, pollution level, and mechanical strength requirements.

What is the difference between polymer and porcelain housing surge arresters?

Silicone polymer housings have lighter unit weight and better pollution tolerance, making them easier to transport and install, and suitable for overhead lines in areas with dust, humidity, or moderate chemical contaminants. Porcelain housings offer higher mechanical tensile strength and better resistance to extreme weather and UV exposure, making them ideal for high-altitude or severely polluted areas with longer service life requirements. Both housing types meet identical electrical performance standards for their respective voltage and current ratings.