Polymeric Metal-oxide Lightning Arrester for Protect Electrical Equipment

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Polymeric Metal-oxide Lightning Arrester for Protect Electrical Equipment

Protect valuable electrical infrastructure with Haivo's polymeric metal-oxide lightning arresters, engineered to eliminate destructive overvoltage events across 0.22-500kV systems. The gapless zinc oxide design maintains microampere-level leakage during normal operation, rapidly transitioning to low-resistance discharge during surges. Both silicone polymer and porcelain housing options accommodate diverse installation requirements in substations and industrial facilities.

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Product Description

Polymeric metal-oxide lightning arresters, also referred to as zinc oxide surge arresters, are dedicated overvoltage protection devices for power transmission and distribution systems. Their core functional component is sintered zinc oxide resistor, which has distinct non-linear volt-ampere characteristics. Under normal system working voltage, the current passing through the arrester stays at microampere or milliampere level, presenting a high-resistance state with minimal impact on regular system operation. When lightning surges or operating overvoltage occur in the system, the resistance of the zinc oxide element drops sharply within a short response time, conducting and releasing overvoltage energy to clamp the voltage and protect downstream electrical equipment.

Different from traditional lightning arresters that rely on series discharge gaps, these devices adopt a fully gapless structure, completing the entire discharge and current interruption process through the inherent non-linear properties of zinc oxide material. This structure eliminates the risk of gap failure caused by environmental factors. These arresters are suitable for overvoltage protection of various electrical assets including distribution lines, power transformers and switchgear cabinets, serving power utilities, industrial manufacturing facilities and commercial procurement projects.

Product Series & Core Features of Zinc Oxide Surge Arresters

Housing & Current Rating Options

Two housing material options are available for these gapless metal oxide surge arresters: silicone polymer housing and porcelain housing. Polymer housing models cover a rated voltage range of 0.22-220kV, and are commonly used in outdoor distribution systems. Porcelain housing models support a wider rated voltage range of 0.22-500kV, adapting to higher voltage level applications.

All products are manufactured with gapless internal structure, and are divided into 5kA, 10kA and 20kA series according to nominal discharge current grade. The 5kA series fits general distribution network scenarios, the 10kA series applies to areas with moderate lightning activity, and the 20kA series is designed for locations with high lightning density or strict protection requirements, covering various demands in industrial applications.

Design Attributes

Integrated streamlined structure for convenient on-site installation and routine maintenance

Hermetically sealed housing design to prevent moisture and dust from entering the internal component

Zinc oxide resistor elements with stable non-linear characteristics as the core working unit

Rated Operating Conditions of Lightning Arresters

These lightning arresters are designed and tested to operate reliably within the following specified environmental and electrical conditions. Application beyond these ranges may affect device performance and service life.

Ambient air temperature: -40℃ - +40℃

Installation altitude: ≤2000m

Applicable system frequency: 48Hz-62Hz

The power frequency voltage applied across the arrester terminals shall not exceed the device’s continuous operating voltage

Applicable earthquake intensity: less than 8 degree

Maximum applicable design wind speed: 35m/s

Technical Specifications of Gapless Surge Arresters

Below are complete parameter tables for all product series. All parameters are tested under standard operating conditions, for reference in model selection and procurement.

5kA Polymer Housing Gapless Metal Oxide Surge Arrester (AC System)

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)	4/10μ high 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

10kA Polymer Housing Gapless Metal Oxide Surge Arrester (AC System)

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)	4/10μ high 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

20kA Polymer Housing Gapless Metal Oxide Surge Arrester (AC System)

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)	4/10μ high 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

5kA Porcelain Housing Gapless Metal Oxide Surge Arrester (AC System)

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)	4/10μ high 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

10kA Porcelain Housing Gapless Metal Oxide Surge Arrester (AC System)

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)	4/10μ high 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

20kA Porcelain Housing Gapless Metal Oxide Surge Arrester (AC System)

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)	4/10μ high 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 Metal Oxide Lightning Arresters

What is the core working principle of gapless zinc oxide surge arresters?

These arresters operate based on the non-linear volt-ampere characteristics of zinc oxide resistor elements. Under normal system operating voltage, the device maintains a high-resistance state with only tiny leakage current, which does not affect the regular operation of the power system. When overvoltage occurs, the resistance of the zinc oxide element decreases rapidly to conduct surge current and release energy, clamping the voltage at a safe level. After the overvoltage disappears, the device automatically returns to the high-resistance state. Unlike traditional arresters, there are no discharge gaps inside the structure.

How to select a suitable lightning arrester model for a specific system?

Model selection mainly depends on three factors: system voltage level, lightning environment, and installation environment. First, confirm the system’s rated voltage to match the arrester’s rated voltage and continuous operating voltage. Second, select the nominal discharge current grade (5kA, 10kA or 20kA) according to local lightning activity and protection requirements. Third, choose between polymer and porcelain housing based on the environmental pollution level and installation conditions.

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

Polymer housing arresters have lower weight and adapt to polluted operating environments, suitable for outdoor distribution lines and areas with heavy pollution. Porcelain housing arresters have higher mechanical strength and adapt to higher voltage levels, suitable for substations and high-voltage transmission systems. Both types adopt gapless zinc oxide structure with consistent protection principles.