Please enter keywords to search

Global |EN

Choose your country & Language

Asia Pacific

Australia & New Zealand
India
Indonesia
Korea
Malaysia
Singapore (Sunlight)
Vietnam

West Asia and Africa

CHINT-EGEMAC
South Africa
UAE

Europe

Italy
Spain
Turkey

North America

Mexico

Latin America

Brazil
Peru

Choose your country & Language

Australia & New Zealand
India
Indonesia
Korea
Malaysia
Singapore (Sunlight)
Vietnam
CHINT-EGEMAC
South Africa
UAE
Italy
Spain
Turkey
Mexico
Brazil
Peru

Please enter keywords to search

Metal Oxide Arrester (MOA) Overview: Working Principle, Types, Applications

JULY 14, 2024

metal oxide arrester
metal oxide arrester
metal-oxide-arrester
metal oxide arrester
metal-oxide-arrester
metal oxide arrester
metal-oxide-arrester

Table of Contents

  1. MOA: Working Principle
  2. The Categories of Metal Oxide Arrester
  3. Applications of Metal Oxide Arresters
  4. CHINT YH10W Metal Oxide Arrester
  5. Wrapping-up

metal oxide arrester (MOA) is a highly beneficial electrical device. It’s used for overvoltage protection of power systems. It consists of metal oxide varistors (MOV). The varistors are connected in series or in parallel as its core component and are enclosed in a sealed insulator housing.

MOA: Working Principle

A metal oxide arrester functions due to the unique electrical properties of zinc oxide varistors under different voltage conditions. During regular operational voltages, the zinc oxide arrester components exhibit high electrical resistance. They allow only minimal microampere-level leakage currents. This permits the arrester to operate continuously without issues.

 

However, when overvoltage transients occur due to events like lightning, the behavior of the zinc oxide changes drastically. Under the influence of large overvoltage surges, the resistance drops substantially. As a result, the leakage current increases sharply to tens of amperes or even tens of kiloamperes. At these higher current levels, the metal oxide arrester can release the excess energy from the transient surge. This process limits the overvoltage to safe thresholds by clamping the peak voltage. Effectively, the MOA diverts and dissipates the dangerous overvoltage surges to the ground before equipment damage can happen.

The Categories of Metal Oxide Arrester

A metal oxide arrester can have different variants. Types of MOA can be differentiated according to their design, construction, and intended use environment. The primary categories include:

10-500kV Surge Arrester with Porcelain Insulator

Featuring durable porcelain insulation, these surge arresters are well-suited for medium and high voltage systems between 10-500kV. They demonstrate high mechanical strength and resist weathering. They are usually employed at outdoor substations and along transmission lines.

1280X1280 1 5
1280X1280 1 5
1280X1280-1-5
1280X1280 1 5
1280X1280-1-5
1280X1280 1 5
1280X1280-1-5

10-500kV Surge Arrester with Composite Insulator

With composite silicone rubber material as insulator, these metal oxide arresters provide insulation in a compact size. They have high pollution resistance, high explosion-proof performance, and high aging resistance.

1280X1280 2 2
1280X1280 2 2
1280X1280-2-2
1280X1280 2 2
1280X1280-2-2
1280X1280 2 2
1280X1280-2-2

110-220kV GIS Surge Arrester with Metal Insulator

Integrated within gas insulated switchgear (GIS), these feature a sealed stainless-steel enclosure. It adopts special pressure-equalizing shielding. The annual leakage rate is less than 1% and the moisture content is less than 150ppm.

1280X1280-3-1-229x300
1280X1280-3-1-229x300
1280X1280-3-1-229x300
1280X1280-3-1-229x300
1280X1280-3-1-229x300
1280X1280-3-1-229x300
1280X1280-3-1-229x300

Applications of Metal Oxide Arresters

Metal oxide arresters find widespread implementation in power grids and industries where overvoltage protection is crucial. Their key applications include:

Substations

Metal oxide surge arresters are crucial components in electrical substations. They protect the electrical equipment from transient overvoltages caused by lightning strikes and switching operations. This enhances the overall safety and performance of the electrical grid.

Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 1
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 1
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-1
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 1
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-1
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 1
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-1

Power Transmission

MOAs are extensively used throughout transmission and distribution systems. Substations rely on them to shield sensitive voltage transformers, circuit breakers, and feeders. Distribution networks install them to protect line equipment and transformers.

Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 2
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 2
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-2
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 2
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-2
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 2
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-2

Industrial Enterprises

Metal oxide arresters are vital for process industries dealing with hazardous materials. Industries like mining benefit from MOA care of electrical motors and variable drives controlling extraction machinery. Railway switchgear and oil/gas control systems also leverage their robust surge immunity.

Metal Oxide Arrester (MOA) OverviewWorking PrincipleTypesApplications-20240714 4
Metal Oxide Arrester (MOA) OverviewWorking PrincipleTypesApplications-20240714 4
Metal Oxide Arrester (MOA) OverviewWorking PrincipleTypesApplications-2024-0714-4
Metal Oxide Arrester (MOA) OverviewWorking PrincipleTypesApplications-20240714 4
Metal Oxide Arrester (MOA) OverviewWorking PrincipleTypesApplications-2024-0714-4
Metal Oxide Arrester (MOA) OverviewWorking PrincipleTypesApplications-20240714 4
Metal Oxide Arrester (MOA) OverviewWorking PrincipleTypesApplications-2024-0714-4

CHINT YH10W Metal Oxide Arrester

CHINT is a premier brand specializing in smart energy solutions. Over the years, we have grown into a reputed corporation focused on building regional smart energy ecosystems. We build these through our green energy, smart networks, and new storage systems. Our YH10W metal oxide lightning surge arrester is suitable for various systems. The following characteristics and advantages have made it a top choice in the industry:

Self-Made Zinc Oxide Resistors

Our proprietary additive manufacturing process produces reliable zinc oxide varistors. These feature optimal nonlinear volt-ampere characteristics that are responsive to steep waves and surges. Our rigorous testing has confirmed the resistors maintain excellent surge absorption performance for years through inherently aged-resistant formulation.

Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 5
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 5
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-5
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 5
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-5
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 5
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-5

Heat Shrink Tubing

The heat shrink tubing provides superior sealing of the zinc oxide blocks. It seals out moisture and contaminants that could compromise reliability. Its sealing abilities also allow for efficient heat dissipation from surges to ensure safe, prolonged operation.

Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 6
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 6
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-6
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 6
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-6
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 6
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-6

Overall Injection Molding Process

The advanced molding technology helps accomplish mechanical protection and rugged moisture-proofing of interior parts. This sealing protects against environmental factors to optimize long-term functioning under tough conditions.

Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 7
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 7
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-7
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 7
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-7
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 7
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-7

Silicone Rubber Housing

Through special additives, the reinforced silicone housing shields the metal oxide arrester from degradation due to UV, staining, ozone, corrosion, and other stresses encountered in outdoor use. This extends stable operational lifetimes for years.

Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 8
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 8
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-8
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 8
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-8
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 8
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-8

Explosion-Proof Design

The YH10W features a special explosion-proof design, which confirms its safe operation can be ensured in various industrial settings.

Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 9
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 9
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-9
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 9
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-9
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 9
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-9

Small Size, Light Weight for Convenient Installation

The compact and lightweight design boasts convenient installation. The easy handling and 360° wire-connecting terminals facilitate easy maintenance.

Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 10
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 10
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-10
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 10
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-10
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications 20240714 10
Metal Oxide Arrester (MOA) Overview Working PrincipleTypes Applications-20240714-10

Wrapping-up

Metal oxide arrester solutions effectively protect power systems from overvoltage transients. They achieve that using the nonlinear conduction properties of zinc oxide varistors. As a leading manufacturer, CHINT offers reliable and high-performing arrester solutions like the YH10W for utilities and industrial users worldwide. We encourage professionals to visit our website to discover our full product portfolio tailored to any application need. With our reliable solutions, you get protection you can trust.

The Latest
Can I Use General Miniature Circuit Breaker (MCB) for PV?
NOVEMBER 5, 2024 Can I Use General Miniature Circuit Breaker (MCB) for PV?

Miniature circuit breakers are widely adopted. They are used for branch circuit protection in many electrical systems. However, as solar photovoltaic technology continues to expand rapidly, one question arises: Can I use a general miniature circuit breaker for PV?

Top 3 Pain Points of Data Center Operations
NOVEMBER 5, 2024 Top 3 Pain Points of Data Center Operations

In today’s digital age, data centers have become critical infrastructure. They enable our increasingly online lives and economies. They store massive amounts of data and power cloud services and applications.

A Complete Guide to LV Distribution Board
SEPTEMBER 10, 2024 A Complete Guide to LV Distribution Board

LV distribution boards, part of the electrical distribution system, securely distribute low-voltage power to facility circuits.

A Guide to Ring Main Units (RMU) in Wind Power Industry
SEPTEMBER 9, 2024 A Guide to Ring Main Units (RMU) in Wind Power Industry

An RMU, or ring main unit, is a type of medium-voltage switchgear. It consists of one or more circuit-breaker units with associated disconnectors, earthing switches, and instrument transformers.

How to Choose a House Distribution Box
SEPTEMBER 9, 2024 How to Choose a House Distribution Box

A well-chosen distribution box ensures the safety and efficiency of your household electrical system. This article guides you through selecting a distribution box.

How Does a Variable Frequency Drive Work?
SEPTEMBER 9, 2024 How Does a Variable Frequency Drive Work?

This article discusses in detail how a variable frequency drive works. Its working generally includes rectification, filtration, and inversion.

Metal Oxide Arrester (MOA) Overview: Working Principle, Types, Applications
JULY 14, 2024 Metal Oxide Arrester (MOA) Overview: Working Principle, Types, Applications

This article discusses how a metal oxide arrester works and introduces its types and applications.

A Guide to CHINT Smart Handheld Test Unit
JULY 14, 2024 A Guide to CHINT Smart Handheld Test Unit

CHINT Smart Handheld Test Unit provides a reliable solution for testing ACB protection functions without risk of damage.

What is a Surge Protective Device (SPD)?
JULY 12, 2024 What is a Surge Protective Device (SPD)?

A surge protective device, also called an SPD, limits overvoltage and prevents potential damage to the electrical equipment.

Soft Starter vs VFD: What’s the Difference?
JULY 11, 2024 Soft Starter vs VFD: What’s the Difference?

This guide breaks down soft starter vs VFD to explain how they work and when you would use one over the other.