New Energy Dedicated Circuit Breaker

TKDW Series Air Circuit Breaker (ACB)

TKD W6GZ Series DC Frame Isolating Switch

TKDM3 Series Moulded-case Circuit Breaker (MCCB)  

TKDM3-HU Series Moulded-case Circuit Breaker (MCCB)

TKDM5-HU Series Moulded-case Circuit Breaker (MCCB)

TKDM3Z Series DC Moulded-case Circuit Breaker (MCCB) 
 

Overview

A new generation of new energy dedicated low-voltage circuit breaker products, including TKDW series Air Circuit Breaker (ACB), TKDM3 series Moulded-case circuit breaker (MCCB), TKDM3-HU series high-voltage Moulded-case circuit breaker (MCCB), TKDM5-HU series high-voltage Moulded-case circuit breaker (MCCB), and TKDM3Z series DC Moulded-case circuit breaker (MCCB). Significant improvements have been made to the circuit breaker's insulation, temperature rise, breaking capacity, and weather resistance, meeting the requirements of various harsh environments such as salt spray, oil mist, mildew, humidity, large temperature differences, and high altitudes. It effectively protects lines and power equipment from damage.

Standards Compliance

● GB/T 14048.1 Low-voltage switchgear and controlgear - Part 1: General rules

● GB/T 14048.2 Low-voltage switchgear and controlgear - Circuit-breakers

● NB/T 10188 Technical specifications for AC grid-connected low-voltage circuit breakers

  Environmental Verification

● GB/T 20645 Technical requirements for low-voltage circuit breakers for use in high-altitude environments under special environmental conditions

● GB/T 20626 Special environmental conditions - High-altitude electrotechnical products - Part 1: General technical conditions

● GB/T 14597 Climatic environmental conditions for electrotechnical products at different altitudes

● GB/T 2423.1 Environmental testing of electrotechnical products - Part 2: Test methods - Test A: Cold

● GB/T 2423.4 Environmental testing of electrotechnical products - Part 2: Test methods - Test Db: Damp heat, cyclic (12h+12h cycle)

● GB/T 2423.18 Environmental testing of electrotechnical products - Part 2: Test methods - Test Kb: Salt mist, cyclic (sodium chloride solution) 
 

Product Features

● Operating Conditions

○ Operating temperature: -45°C~+70°C

○ Storage temperature: -45°C~+70°C (with control unit)

○ Suitable for pollution degree 3

○ Passed high-altitude, salt spray, damp heat, and high/low temperature tests

● Features "low voltage ride-through" function

● Operable at altitudes up to 5000m 
 

Special Requirements for Electrical Components Selected in New Energy Systems

High Reliability

Based on the service life and construction site of the power plant, the reliability of the system must be improved, and the reliability of electrical components is crucial. It must operate stably under various harsh environments such as large temperature differences, high altitudes, and humidity.

Unique DC Breaking Characteristics

The biggest difference between DC and AC is that the DC arc does not pass through zero. When a short circuit occurs, it is more difficult to cut off. Therefore, how to effectively cut off the arc is crucial. The contacts adopt a super-large opening distance design to better lengthen and thin the arc, increase the arc resistance, and combined with an optimized magnetic blowout structure, a stepped gas-generating hood gas-blowing effect, and an interlaced arc-extinguishing chamber, greatly improving the natural arc-extinguishing capability.

Wideband Circuit Breaker Design

The output frequency of wind turbines is fluctuating (10-200Hz), which directly affects the performance of the circuit breaker. Our company adopts a highly reliable controller design scheme and a unique arc-extinguishing scheme to greatly improve product reliability.

Harsh Environment

Photovoltaic and wind power stations are generally built in mountains, deserts, and barren lands, with large diurnal temperature differences. The traditional electrical equipment's operating temperature range of -5°C to +40°C is far from meeting the requirements of environmental changes, and the operating environment of -40°C to +70°C has been included in the assessment standards.

(Wind power) photovoltaic power stations often suffer from humid corrosion. Electrical components need to undergo anti-salt spray treatment to ensure normal operation in humid and cold environments for extended periods, passing alternating damp heat tests.

High-altitude regions have abundant sunshine, but the high altitude leads to low atmospheric pressure, reduced insulation level, and weakened heat dissipation capacity. The traditional electrical equipment's altitude limit of 2000 meters cannot meet the requirements, and high-altitude environments of 3000-5000 meters must usually be considered.

Typical Wind Power Generation Case

Wind Power Generation (Full Power) Power Station

 

Onshore Wind Power (Doubly Fed) Power Station

Product Matching (Example: AC690V Scheme)

Typical Cases of Photovoltaic Power Generation

Photovoltaic (Centralized Double-split) Power Station

Photovoltaic (Distributed) Power Station

Typical Cases of Photovoltaic (String-type) Power Station

Core Product Introduction

TKDW Series Air Circuit Breaker (ACB)

Main technical parameters：

● Number of Poles：3P、4P

● Rated working current：200-7500A

● Rated voltage：AC400V、AC690V、AC800V、AC1140V

Product Features：

● U-shaped busbar design with vertical layout, lower temperature rise

● Arcing system with pressure structure design, Arcing distance is zero

● High breaking capacity：Icu=Ics=Icw，AC400V up to 135kA、AV800V up to 85kA,AC1140V up to 85kA

● Two-stage contact system design, high Mechanical life

● Good weather resistance, suitable for plateau, salt spray and other special environments

Model and Meaning

TKDW6GZ series DC frame isolating switch

Main technical parameters：

● Number of Poles：True 2P

● Rated working current：200-4000A

● Rated voltage：DC1500V

Product Features：

● Small size：Two-pole shape and size products, compared with the existing four-pole DC products, the volume is reduced by 40%, greatly saving cabinet space;

● High short-time withstand current: 1-second short-time withstand current up to 100kA, 0.2s short-time withstand current up to 150kA;

● High breaking capacity：DC1500V、τ=15ms, breaking capacity up to 16kA;

● High making capacity：short-circuit making capacity up to 100kA;

● Low power consumption：Compared with the existing four-pole DC products, the power consumption of two-pole products is reduced by 50%;

● Wide range：Meet different application scenarios, usage categories: DC-23A、DC-22A、DC-PV2.

TKDM3-HU series high-voltage Moulded-case circuit-breaker (MCCB)

Main technical parameters：

● frame size：250、320、350、400；

● Pole number：3P;

● Rated current（In）:63A~400A；

● Rated voltage（Ue）:AC800V/1000V（TKDM3-250HU、TKDM3-400HU）

（Ue）:AC800V/1000V/1140V（TKDM3-320HU、TKDM3-350HU）

Product Features：

● Independent arc extinguishing module device, ensuring reliable breaking of large current and high voltage level, AC800V reliable breaking 50kA

● Full series, contact opening distance ≥40mm；

● Applicable to high altitude 5000m, can operate from -40℃～+70ºC;

● Isolation function：

Model and Meaning

TKDM5-HU series high-voltage Moulded-case circuit-breaker (MCCB)

Main technical parameters：

● frame size：250、320、400、630；

● Pole number：3P;

● Rated current（In）:32A~630A；

● Rated voltage（Ue）:AC800V/1000V/1140V

Product Features：

● Modular design, independent design between each phase contact, improving inter-phase insulation performance；

● Rotating double breaking point, large opening distance structure, AC800V reliable breaking 60kA；

● Applicable to high altitude 5000m, can operate from -40℃～+70ºC;

● Isolation function：

Model and Meaning

Note: Rated current 80A and below, the release type is only TMD3 type, both thermal and magnetic are not adjustable

TKDM3Z Series DC Moulded-case Circuit Breaker (MCCB)

Main technical parameters：

● frame size：250、630；

● Pole number：3P、4P;

● Rated current（In）:16A~630A；

● Rated voltage（Ue）:DC500~DC1500V；

Product Features：

● Parallel built-in series double breaking point technology；

● DC500V, breaking capacity 65kA；DC750V, breaking capacity 50kA;

DC1000V, breaking capacity 40kA;DC1250/1500, breaking capacity 20kA;

● Can meet the needs of various DC grounding methods；

● Applicable to high altitude 5000m, can operate from -40℃～+70ºC；

● Isolation function：

Model and Meaning

TKDM3 Series Moulded-case Circuit Breaker (MCCB)

Main technical parameters：

● frame size：125、250、400、630、800；

● Pole number：3P、4P;

● Rated current（In）:10A~800A；

● Rated voltage（Ue）:AC400V/500V/690V；

Product Features：

● Modular accessories；

● High breaking capacity, up to 100KA；

● High altitude up to 5000m, can operate from -40℃～+70ºC；

● Isolation function：

Model and Meaning