Zhejiang wanlai Intelligent electric co., ltd.
JCM1- Moulded Case Circuit Breaker
JCM1 series Moulded Case Circuit Breaker (hereinafter referred to as circuit breaker) is a new type of circuit breaker developed by our company with international advanced design and manufacturing technology.
Overload protection, Short circuit protection, Under voltage protection
Rated insulation voltage upto 1000V, suitable for infrequent conversion and motor starting
Rated working voltage up to 690V,
Available in 125A, 160A, 200A, 250A, 300A, 400A, 600A, 800A
Complies with IEC60947-2
Introduction:
Molded Case Circuit Breakers (MCCB) is a required component of electrical systems, providing overload protection and short-circuit protection. In most cases, MCCBs are installed in the main power distribution board of a facility, allowing the system to be easily shut down when necessary. MCCBs are available in various sizes and ratings, depending on the size of the electrical system.
In this guide, we’ll cover the components and features of a typical MCCB, how they work, and which types are available. We’ll also discuss the benefits of using this type of breaker in your electrical system.
lts rated insulation voltage is 1000V, which is suitable for infrequent conversion and motor starting in circuits with AC 50 Hz, rated working voltage up to690V and rated current up to 800ACSDM1-800 without motor protection).
Standard: IEC60947-1, general
lEC60947-2 low voltage circuit breaker
IEC60947-4 electromechanical circuit breakers and motor starters
IEC60947-5-1, electromechanical control circuit apparatus
The most important features
● The circuit breaker has overload, short circuit and undervoltage protection functions, which can protect the line and power equipment from damage. At the same time, it can provide indirect contact protection for people, and can also provide protection for long-term grounding fault that cannot be detected by over-current protection, which may cause fire hazard
● The circuit breaker has the characteristics of small volume, high breaking height, short arcing and anti vibration
● The circuit breaker can be installed vertically and horizontally
● The circuit breaker cannot be switched in, that is, only 1, 3 and 5 are allowed as power terminals, and 2, 4 and 6 are load terminals
● The circuit breaker can be divided into front wiring, back wiring and plug-in wiring
Technical Data
● Standard: IEC60947-2
● Rated operating voltage: 690V; 50/60Hz
● Isolating voltage: 2000V
● Surge voltage wear resistance：≥8000V
● Connecting:
rigid or flexible conductors
front conductors joining
● Connecting:
rigid or flexible conductors
front conductors joining
possibility for mounting to lengthening terminal
● Plastic elements
Flame resistant material nylon PA66
box permitivity strength: >16MV/m
● Abnormal heating wear resistance and fire of the outer parts: 960°C
Static contacts - alloy: pure copper T2Y2, contact head: silver graphite CAg(5)
● Tightening moment: 1.33Nm
● Electrical wear resistance (number of cycles): ≥10000
● Mechanical wear resistance (number of cycles): ≥220000
● IP code: IP>20
● Mounting: vertical; joining with bolts
● Plastic material of UV rays and non-flammable
● Test button
● Ambient temperature: -20° ÷+65°C
What is a MCCB?
MCCB is a short form for Molded Case Circuit Breaker. It is a common example of an electrical safety device that is more often than not used when the load current is significantly higher than the limit of a miniature circuit breaker.
The MCCB offers protection against short circuit faults and is even used for switching the circuits. It can be employed for higher current ratings as well as fault level, in the case of a few domestic purposes. The wide current ratings and high breaking capacity in Molded Case Circuit Breaker mean that they are even suitable for industrial reasons.
How the MCCB operates？
The MCCB uses a temperature sensitive device (the thermal element) with a current sensitive electromagnetic device (the magnetic element) to provide the trip mechanism for protection and isolation purposes. This enables the MCCB to provide:
Overload Protection,
Electrical Fault Protection against short circuit currents, and
Electrical Switch for disconnection.
What is the difference between MCB and MCCB?
MCB and MCCB are commonly used circuit protection devices. These devices provide protection against over current and short circuits. There are few differences between these two devices besides current rated capacity. Current rated capacity of MCB is commonly under 125A, and MCCB is available up to the rating of2500A.
