Scope of application
CJX2 series AC contactor (hereinafter referred to as contactor) is mainly used for AC 50Hz or 601 Hz, with rated insulation voltage of 690V
In the circuit with rated working voltage of 380V and rated current of 620A under AC-3 service category, it is used for remote connection and breaking of circuits, and can form an electromagnetic starter with appropriate thermal overload relay to protect the circuit that may have operation overload. The contactor is suitable for frequent starting and controlling AC motor.
The product complies with GB14048 4. Lec60947-4-1 standard.
Model and its meaning
4 represents four pairs of normally open main contacts, 8 represents two pairs of normally open main contacts, two pairs of normally closed main contacts and the number of normally closed auxiliary contacts
Number of normally open auxiliary contacts
380V under rated working current AC-3 service category
Design serial number
small-scale
AC contactor
Normal working and installation conditions
● ambient air temperature: - 5 ℃ ~ + 40 ℃, and its average value within 24 hours shall not exceed + 35 ℃;
● altitude: no more than 2000m;
● atmospheric conditions: at + 40 ℃, the relative humidity of the atmosphere shall not exceed 50%; Higher relative humidity is allowed under lower temperature. The monthly average minimum temperature in the wettest month shall not exceed 25 ℃, and the monthly average maximum relative humidity in that month shall not exceed 90%. Measures must be taken for condensation on products due to temperature changes;
● pollution level: Level 3;
● installation category: Class III;
● installation conditions: the inclination between the installation surface and the vertical surface shall not be greater than ± 5 °;
● impact and vibration: the product shall be installed and used in a place without significant shaking, impact and vibration.
Main parameters and technical performance
Structural features
4.1 the building block installation method can be adopted, and the auxiliary contact group, air delay head, thermal relay and other accessories can be added to form a variety of derivative products (see Table 1)
4.2 AC contactor has the characteristics of small volume, light weight, low power consumption, high service life, safety and reliability;
4.3 the contactor body has a pair of normally open or normally closed auxiliary contacts at 32a and below, and a pair of normally open and normally closed auxiliary contacts at 40A and above,
115a and above products do not have auxiliary contacts. In addition, F4 and F8 auxiliary contact groups or air delay head and other accessories can be added;
4.4 in addition to screw installation, contactors can also be installed with 35mm [cjx2-09 ~ 95], 75mm [cjx2-40 ~ 95] and 2 x 35mm [CJX2]-
1) installation of 15 ~ 170] type standard clamping rail.
> What is the role of a fuse?
A fuse refers to an electrical device that, when the current exceeds a specified value, uses the heat generated by itself to fuse the melt and disconnect the circuit...
> Precautions for the working principle of molded case circuit breakers
The molded case circuit breaker adopts a heat release contact. When the current exceeds the rated value, the contact is heated, causing the spring force to decrease,...
> The difference between fast fuse and ordinary fuse
Fast fuse is a kind of fuse, fast fuse is used for short circuit protection of semiconductor rectifier components or circuit breakers. Because the overload capacity ...
> The meaning and working principle of RCCB, and a few points you want to know
This article will tell you about the working principle, function, and main structure of residual current circuit breaker (RCCB), and solve customers' concerns about ...