Zhejiang Dongan Electrical Co., Ltd.

Complete Process System

We have been providing the world with reliable and environmentally friendly products, which have passed various certifications.

Reliable Industrial Solutions

Scientific management means, strong technical force, mature process equipment, perfect testing system, rapid response after-sales service.

Mature and High-end Service

Adhere to the guidance of scientific and technological intelligent manufacturing, pay attention to product research and development, and actively strengthen cooperation and exchanges with professional colleges.

Global Expertise

The products are widely used in the State Grid Southern Power Grid and industrial and mining enterprises, and exported to the Middle East, West Asia, South America and Southeast Asia. Get unanimous praise from customers!

Product

ZAM3 Series Moulded Case Circuit Breaker

ZAM3 series moulded case circuit breakers(hereafter simply referred to as circuit breakers) are one of the new type breakers which have been developed using international advanced design and manufacturing technology.

ZAM3L Series Residual Current Circuit Breaker

ZAM3L series moulded case circuit breakers(hereafter simply referred to as circuit breakers) are one of the new type breakers which have been developed using international advanced design and manufacturing technology.

ZAM3E Series Electronic Circuit Breaker

ZAM3E series electronic circuit breakers(hereafter simply referred to as circuit breakers) are one of the new type breakers which have been developed using international advanced design and manufacturing technology.

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We will bring more mature products and services to users with the spirit of ingenuity, and look forward to win-win cooperation and common development with you with a sincere attitude!

Workshop Environment

Production Equipment

About Us

Since its establishment, the company has adhered to the quality policy of "science first, quality first". After nearly 30 years of hard-working, the company has rich experience and technological innovation ability in product R&D. The company has been committed to the pursuit of high quality, new products, highly competitive product prices and supply speed, perfect service quality, in order to achieve the state of As Good as It Gets. We are willing to let the customer first understand us, grows together, realizes the cooperation win-win!

Zhejiang Dongan Electrical Co., Ltd is a modern enterprise specializing in electrical appliance design,manufacturing sales and service. The company produces series products of AC MCCB，AC ELCB，AC ACB,DC MCCB. The company can also provide thermosetting Compression，Mental Stamping and moulds and parts. The products are covered by CE CB TUV CCC certificates.

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Global Customers

Honor

The company adheres to the service concept of "customer first, quality first, integrity and compliance, and value win-win".

News

News is a news service platform that contains a large amount of information, and truly reflects important events at every moment. You can quickly learn about their new developments.

The function of the electronic molded case circuit breaker

2026-03-03 15:45:04

Electronic molded-case circuit breaker rated limit short-circuit breaking capacity Icu: The circuit breaker has two breaking capacity index values: the rated limit short-circuit breaking capacity Icu and the rated short-circuit breaking capacity Ics. As a characteristic parameter, Ics is not only a simple consideration of the breaking capacity of the circuit breaker, but also a durability index—in other words, it ensures normal operation after multiple short-circuit faults.

What are the advantages of smart circuit breakers compared with traditional circuit breakers?

2026-03-03 15:45:04

With the advent of the Internet of Things, whether in industrial production or daily life, the quality requirements for power supply systems have been subject to increasingly clear specifications. This mandates that power distribution systems achieve higher levels of automation technology and intelligence. When a power supply system experiences faults, intelligent protection equipment can immediately identify the fault types, quickly isolate the faulty part within the system, preventing further fault escalation, ensuring normal operation of the entire system, and enabling intelligent energy consumption monitoring, decision-making, and management. The intelligent circuit breaker fulfills these functions.

How to operate the universal circuit breaker?

2026-03-03 15:45:04

Universal circuit breakers, also known as frame circuit breakers can be used to manufacture and interrupt load circuits, and can also control motors that are not frequently operated. This combines the functions of knife switches, overcurrent relays, pressure controllers, and undervoltage protection in distribution networks, serving as an integrated thermal relay.

The principle of molded case circuit breaker for electronic devices

2026-03-03 15:45:04

The key connection points for circuit breakers in plastic housings for electronics are manual ‌operation‌ or motorized connections. After the main connection is turned off, the free ‌trip‌ mechanism locks the main connection at the ‌terminal‌. The electromagnetic coil of the overcurrent ‌release‌ and the thermal components of the thermal ‌release‌ are connected in series with the main circuit, while the electromagnetic coil of the undervoltage ‌release‌ and the power supply are connected in parallel.