M1 / NLDM1 Series Moulded Case Circuit Breaker MCCB Manufacturer | 400V–1000V | 10A–2000A | High Breaking Capacity
The M1 / NLDM1 Series moulded case circuit breaker (MCCB) is designed for AC power distribution up to 1000V and 2000A. It provides overload, short circuit and undervoltage protection with high breaking capacity, compact design and modular accessories. Ideal for industrial, commercial and motor protection applications.
U-Shaped
Static Contact
NLDM1-125L、 NLDM1-250、 NLDM1-400、 NLDM1-630L and NLDM1-800L series of circuitbreakers are new upgraded circuit breakers researched and developed by the company combined with the advantages ofsimilar international products and demand of domestic and international markets.
With insulation voltage up to 1000V,the circuit breaker is applicable for distribution systems of AC50Hz, rated working voltage 400V and rated working current from10A to2000A,used to distributeelectric power energy, protect circuits and power equipment against overload,short circuit,undervoltageand so on,also can be used forinfrequent startup of motorand protect it from overload,short circuit orundervoltage.
It is featured with small size,high breaking,short flashover,etc.,is the ideal product for users.It can bevertically installed orhorizontally installed.
Product Features
Feature 1: Current Limiting Capacity
Current-limiting refers to limit of the increase of short-circuit current in the loop,and in the loop
protected by NLDM1,peak value of the short-circuit current and the I2t energy in the circuit will be
much smaller than the prospective value.
Unique U-shaped static contact can achieve pre-breaking technology:
The so-called pre-breaking technology refers to when short-circuit current flows through the contact
system, electric power generated by U-shaped static contact and moving contact is mutual
exclusive. The greater the short-circuit current, the greater the repulsion of the electromotive force, and
it is generated together with the short-circuit current at the same time. Before the trip action occurs,
the electrodynamic repulsion force can make the static and moving contact separation, by increasing the arc
to increase the equivalent resistance between them to achieve the purpose of suppressing increase
of short-circuit current.
Feature 2: Modularized Accessories
●Accessory: For the circuit breakers of the same frame,they has uniform sizes regardless of the
breaking capacity and rated current
●Accessory: Users can freely choose and expand functions of circuit breakers according to their needs
●Modularized accessories have insulaton function,which is easy for hot-line operation and installation
Feature 3: Miniaturized Frame
6 frame sizes: 63 type,125 type,250 type,400 type,630 type,800 type
Rated current of NLDM1 series 10A–800A
Feature 4: Contact Repulsion Device
(Patented Technology)
The technical scheme adopted by the invention is:
As shown in Figure 1, the new contact device is mainly consisted of static contact, moving contact, shaft 1, shaft 2, shaft 3 and springs; When the circuit breaker is in the closed state, shaft 2 acts on the right side of the spring angle; When the circuit breaker has a large fault current, the moving contact will be subjected to the electric repulsion generated by the current itself, and rotate with the center of shaft 1, when shaft 2 rotates to the top of the spring angle with the moving contact, it makes moving contact to rapidly rotate upwards and quickly break the circuit upon the re-action of spring. It has enhanced the breaking capacity of the product through optimization of the contact structure.
Feature 5: Intelligence
Network communication is more convenient.It accesses to Mod bus communication system through dedicated connection.
NLDM1 with communication function can select monitoring accessories to realize door display,read,set and control.
Feature 6: Modularized Arc Extinguishing System
WORKSHOPS
TESTING CENTER
Product Details
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FAQs
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NLDM1 Molded Case Circuit Breaker（MCCB）
What is the rated voltage of the M1 / NLDM1 MCCB?
The rated operating voltage is AC 400V, with insulation voltage up to 1000V.
Does this MCCB support motor protection?
Yes, it is suitable for infrequent motor starting and motor protection.
Can you provide OEM or customized MCCB solutions?
Yes, we offer OEM and ODM services as an MCCB manufacturer.
What installation methods are supported?
Both vertical and horizontal installation are supported.
Is this MCCB suitable for industrial applications?
Yes, it is designed for industrial, commercial and infrastructure power systems.
What are the main advantages of this MCCB?
Compact size, high breaking capacity, modular accessories, reliable protection and international standard compliance.
What current ratings are available?
The MCCB is available from 10A to 2000A.
What standards does the MCCB comply with?
It complies with IEC 60947-2 and GB 14048.2 standards.
What protection functions does the MCCB provide?
It provides overload, short-circuit and undervoltage protection.
What is a moulded case circuit breaker (MCCB)?
A moulded case circuit breaker is a low-voltage circuit breaker used to protect electrical circuits from overload and short circuit.
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