Photovoltaic DC molded case circuit breaker? Photovoltaic DC molded case circuit breaker manufacturers to plastic case for protection of the circuit breaker, referred to as plastic case circuit breaker, also known as air switch. 

Scope of application.

1 . Below 2000m altitude .

2 . Surrounding medium temperature below +40 (above +45 for marine products) and above -5 .

3 . Resistant to the effects of humid air

4 . Resistant to salt spray and oil spray.

5 . A maximum inclination of 25.5 .

6 . Can work reliably during normal vibration of the ship .

7 . Reliable operation under the influence of earthquakes (4g ) .

8 . Free from explosion hazards, insulation-breaking gases and conductive dusts sufficient to corrode metals in media

9 . Where it is not raining or snowing.

The role of the moulded case circuit breaker is to replace the fuse and the gate knife switch and the new products derived from it, regardless of how the product has been improved and changed, it generally has a six-link operating mechanism and no flying arc function, which is the most mainstream air switch circuit breaker necessary function on the market. As the meal knife switch has no protection function.

Taisi Electric plastic case circuit breakers are divided into single pole (below 63A), three pole and four pole according to the number of poles of the product. The type of neutral pole (n-pole) in four-pole products can be further divided into the following four types.

Type a: n-pole is not fitted with an overcurrent striker, and the n-pole is always connected and not combined with the other three poles.

b type: n pole is not fitted with an overcurrent release device and the n pole is combined and divided with the other three stages; n pole has no back point).

type c: overcurrent release device fitted to n-pole and n-pole is combined and divided with other three poles; n-pole is first combined and then divided).

Type d: n-pole fitted with an overcurrent release and n-pole always connected, not combined with the other three poles.

Taisi electrical circuit breakers are divided according to rated current a (class).

-63 is divided into 6, 10, 16, 20, 25, 32, 40, 50, 63A grades (6A specifications without overload protection).

-100 is 10, 16, 20, 25, 32, 40, 50, 63, 80, 100A class 10; S-3VI3-160 is 100, 125, 140, 160A class 4.

-250 is eight grades of 100, 125, 140, 160, 180, 200, 225, 250A.

-400 consists of five grades 225, 250, 315, 350 and 400A.

-630 is three grades of 400, 500 and 630A.

-800 is 630, 700 and 800A in three grades.

-1250 is 1000, 1250 a Class II.

Depending on the wiring method, there are 3 types of wiring: pre-board wiring, post-board wiring and plug-in type.

According to the type of overcurrent tripper, it can be divided into thermal-motorized (compound) type, electromagnetic (instantaneous) type two.

Photovoltaic DC molded case circuit breaker manufacturers molded case circuit breaker structure by the operating mechanism, contacts, protection devices (a variety of decoupling devices), arc extinguishing system and other components. The main contact of the PV DC molded-case circuit breaker is manually operated or electrically connected. After the main contact is closed, the free release mechanism locks the main contact in the on position. The coil of the overcurrent tripper and the thermal element of the thermal tripper are connected in series with the main circuit and the coil of the under-voltage tripper is connected in parallel with the power supply. When the circuit is short-circuited or severely overloaded, the armature of the overcurrent tripping device adsorbs, the free tripping mechanism acts and the main contact cuts off the main circuit. After the circuit is overloaded, the thermal element of the thermal release device heats up and bends towards the bimetal, and the free release mechanism starts. When there is insufficient voltage in the circuit, the armature of the undervoltage release mechanism is released. The free buckling mechanism is also activated. The branch decoupling device is used for remote control, the coil is switched off during normal operation, when distance control is required the start button is pressed to switch on the coil and the armature activates the free decoupling mechanism to close the main contacts.