PV Protection Products-PV MCCB

The plastic-case circuit breaker, a crucial component in power distribution and control, is designed to shield electrical circuits from the risks of overload and short circuits. It functions by automatically cutting off the current when it surpasses a pre-determined safe limit, thus safeguarding both the circuit and the connected equipment. The term “plastic-case” refers to its housing made from plastic insulation, which serves to effectively separate the conductors from any grounded metal parts, enhancing the overall safety.

Typically, these circuit breakers are fitted with thermomagnetic trip units, and the larger models are equipped with solid-state trip sensors. The tripping mechanism is categorized into two main types: thermal magnetic and electronic tripping. Available in a range of rated currents, their common specifications include 16, 25, 30, 40, 50, 63, 80, 100, 125, 160, 200, 225, 250, 315, 350, 400, 500, and 630 amps, catering to various power system requirements. This array of specifications enables the widespread application of plastic-case circuit breakers in diverse power systems, ensuring dependable protection across a broad spectrum of electrical circuit setups.



Protecting Circuits and Electrical Equipment: These breakers act swiftly in the event of malfunctions in electrical devices or wiring. By quickly cutting off the current, they prevent faults from worsening, thereby safeguarding the integrity of electrical systems and preventing damage to connected equipment and circuits.

Regulating Current Flow: Plastic-case circuit breakers are adept at managing the amount of current passing through a circuit. They maintain control over circuit loads, which is crucial for avoiding equipment damage due to overloading or short-circuiting.

Boosting Overall Circuit Safety: By effectively mitigating the risks of circuit overload and short circuits, these breakers play a critical role in reducing incidents such as fires, explosions, or electrical shocks. This enhancement of safety measures makes them an essential component in any electrical system, contributing significantly to overall electrical safety.

Application scenarios

Residential and Office Circuit Safety: In homes and offices, these circuit breakers play a crucial role. They swiftly isolate problematic circuits, thereby ensuring the safe functioning of domestic appliances and office equipment. This quick response is key to preventing potential damage arising from electrical issues.

Data Center and Computer Room Reliability: In environments like data centers and computer rooms, where there is a high density of equipment and a critical need for stable operation, plastic-case circuit breakers are indispensable. They provide robust circuit protection, ensuring the safety of the equipment and enhancing the overall reliability and stability of these vital systems.

Industrial Circuit Protection: The industrial sector, characterized by frequent load variations in circuits, is particularly susceptible to electrical failures. Here, plastic-case circuit breakers are vital, as they effectively shield the circuits from such failures. This ensures uninterrupted and safe operations in industrial processes, highlighting the breakers’ significance in maintaining industrial productivity and safety.

Service environment

High-Altitude Adaptability: They can be effectively installed at locations as high as 5500 meters above sea level.

Humidity Resistance: Suitable for environments with humid air, these breakers are available in a variant specifically designed for moisture resistance (identified as three-proof type).

Salt Mist and Oil Mist Resilience: They are engineered to withstand environments with salt mist and oil mist, which is particularly relevant in certain industrial and coastal areas (also part of the three-proof type).

Mold Resistance: These circuit breakers can also tolerate mold, ensuring their reliability in environments prone to fungal growth (included in the three-proof type).

Safe for Non-Explosive Environments: They are intended for use in areas without any explosion risk, and where the atmosphere does not have the potential to corrode metals or degrade insulation due to gases or conductive dust.

Note: For the specific three-proof variant, which includes resistance to humidity, salt mist, oil mist, and mold, a special customization request is needed. Please specify with the designation “TH” for these requirements.

Number of poles 2 2 3 2 3 2 3 2 3
Rated operational voltage Ue (V) DC500 DC500 DC1000 DC1500 DC500 DC1000 DC1250/1500 DC1250/1500 DC500 DC1000 DC1250/1500 DC1250/1500 DC500 DC1000 DC1250/1500 DC1250/1500
Rated insulation voltage Ui (V) DC750 DC1250 DC1500 DC1500 DC1500 DC1500
Rated impulse withstand voltage Uimp (kV) 8 8 12 12 12 12
Rated current In (A) 63、80、100、125 63,80,100,25,40,60,180,200,225,250,280,315,320 225、250、315、350、400 500、630 700、800
Rated limit short-circuit capacity lcu(kA) H type 40(5ms) 50 20 20 70 40 20 20(2-pole string)
40(3-pole string)
70 40 20 20(2-pole string)
40(3-pole string)
70 40 20 20(2-pole string)
40(3-pole string)
R type / / / / 85 60 40 40(2-pole string)
50(3-pole string)
85 60 40 40(2-pole string)
50(3-pole string)
85 60 40 40(2-pole string)
(3-pole string)
Rated operating short-circuit breaking capacity lcs (kA) Ics=100%
Connection Up in, down out/down in, up out (2P, 320/3P)  Down in, down out/up in, up out (3P)
Utilization category
Does it have isolation function
Operating ambient temperature -35℃~+70℃
Mechanical lifespan (times) 20000 20000 10000 5000 5000
Electrical lifespan (times) 3000 3000 2000 1500 1000 1000 700 500 1000 1000 700 500 1000 1000 700 500
Compliant with standards IEC/EN 60947-2 GB/T 14048.2
Annex Shunt excitation, auxiliary, alarm, manual operation, electric operation
Authentication CCC、CB、CE、TUV
Dimensions (length x width x height) 150x64x95 180x76x126(2P)