OEM Intelligent Universal Circuit Breaker SJKW1-2000 from China Suppliers | Factory Direct, Overload & Short-Circuit Protection Manufacturers, Companies

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OEM Intelligent Universal Circuit Breaker SJKW1-2000 from China Suppliers | Factory Direct, Overload & Short-Circuit Protection Manufacturers, Companies

This Air Circuit Breaker is expertly designed for 50Hz AC distribution networks, accommodating voltages up to 690V and current ratings from 200A to 6300A. It offers comprehensive protection against overloads, short circuits, undervoltage, and ground faults, ensuring optimal safety and reliability. Its intelligent selective protection feature significantly enhances power reliability, making it a must-have for modern electrical systems. Open communication interfaces facilitate seamless remote control, perfect for integration with automation systems. Rated for altitudes up to 2000m and featuring an 8kV impulse withstand voltage, this versatile device also serves as an isolator without needing controllers. Combining precision protection with smart grid compatibility, this product is ideal for customers seeking reliable solutions from trusted China suppliers and factories

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Product Description

Type Designation

1 Rated current in scope of frame size

1600 type	200A, 400A, 630A, 800A, 1000A, 1250A, 1600A
2000 type	630A, 800A, 1000A, 1250A, 1600A, 2000A
3200 type	2000A, 2500A, 3200A
4000 type	2500A, 3200A, 4000A
6300 type	4000A, 5000A, 6300A

2 Number of poles

3 - default; 4 - 4 pole

3 Installation

Fixed type — horizontal, vertical

Drawout type — horizontal, vertical

4 Intelligent Controller

M type

2M type: Digital display, over-current protection (overload, short delay, instantaneous), 4P or 3P+N have earthing protection.

3M type: LCD display, over-current protection (overload, short delay, instantaneous), 4P or 3P+N have earthing protection.

H type

2H type: Communication function, digital display, over-current protection (overload, short delay, instantaneous), 4P or 3P+N have earthing protection.

3H type: Communication function, LCD display, over-current protection (overload, short delay, instantaneous), 4P or 3P+N have earthing protection.

5 Common Use Accessory

Shunt release — AC220V/230V, AC380V/400V, DC220V, DC110V

Undervoltage release — AC220V/230V, AC380V/400V; classified to instantaneous type and time-delay type.

Closing electromagnet — AC220V/230V, AC380V/400V, DC220V, DC110V

Motor-driven energy-storage mechanism — AC220V/230V, AC380V/400V, DC220V, DC110V

Auxiliary contact — 4a4b, 2a6b, 3a3b (Note: a = normal open, b = normal close)

6 Optional Accessory

Mechanical interlock:

One circuit breaker (1 lock + 1 key)

Two circuit breakers (steel cable interlock, connecting rod interlock, 2 locks + 1 key)

Three circuit breakers (3 locks + 2 keys, connecting rod interlock)

Automatic power transfer system

Current transformer connected with neutral lead

Product Display

SJKW1-2000 intelligent universal circuit breaker overview

SJKW1-2000 intelligent universal circuit breaker front view

W1-ACB intelligent universal circuit breaker component

SJKW1-2000 intelligent universal circuit breaker angle view

SJKW1-2000 intelligent universal circuit breaker side angle

Technical Parameters

Rated current of frame (Inm)	Voltage	1600	2000	3200	4000	6300
Ue (V)	-	AC400V / AC690V	AC400V / AC690V	AC400V / AC690V	AC400V / AC690V	AC400V / AC690V
Ui (V)	-	1000	1000	1000	1000	1000
Rated Frequency (Hz)	-	50 Hz	50 Hz	50 Hz	50 Hz	50 Hz
Rated ultimate short-circuit breaking capacity (Icu, kA) O-CO	400V	65	85	100	100	120
	690V	50	50	65	65	80
Rated short-circuit making capacity nxIcu (kA) / cosφ	400V	143	176 / 0.2	220 / 0.2	220 / 0.2	264 / 0.2
Rated short-circuit making capacity nxIcu (kA) / cosφ	690V	105	105 / 0.25	143 / 0.2	143 / 0.2	187 / 0.2
Rated service short-circuit breaking capacity (Ics, kA) O-CO-CO	400V	55	50	65	65	80
	690V	42	40	50	50	70
Rated short-time withstand current Icw (kA) 1s, Time delay 0.4s, O-CO	400V	55	50	65	65 / 80 (MCR)	85 / 100 (MCR)
	690V	42	40	50	50 / 65 (MCR)	65 / 75 (MCR)

Installation and Overall Dimensions

Frequently Asked Questions

Q1 What frame sizes are available for the SJKW1 Intelligent Universal Circuit Breaker?

The SJKW1 series is available in five frame sizes: 1600, 2000, 3200, 4000, and 6300. Each frame size covers a specific range of rated currents, from 200A up to 6300A, to suit a wide variety of power distribution applications.

Q2 What are the differences between the M type and H type intelligent controllers?

The M type controllers (2M and 3M) provide digital or LCD display with over-current protection functions. The H type controllers (2H and 3H) include all M type features plus a built-in communication function, making them suitable for smart grid and remote monitoring applications.

Q3 What installation methods does the SJKW1 circuit breaker support?

The SJKW1 supports both fixed type and drawout type installation. Both types are available in horizontal and vertical orientations, providing flexible options for different switchgear cabinet configurations.

Q4 What rated voltages does the SJKW1 series operate at?

The SJKW1 series operates at rated voltages of AC400V and AC690V across all frame sizes. The rated insulation voltage (Ui) is 1000V. This makes it suitable for standard industrial and commercial power distribution systems.

Q5 What optional accessories are available for the SJKW1 circuit breaker?

Optional accessories include mechanical interlocks for one, two, or three circuit breakers (with various lock and key configurations), an automatic power transfer system, and a current transformer connected with a neutral lead. These accessories enhance safety and operational flexibility.

Q6 What is the rated ultimate short-circuit breaking capacity (Icu) of the 6300 frame at 400V?

The 6300 frame size achieves the highest rated ultimate short-circuit breaking capacity (Icu) of 120 kA at 400V, and 80 kA at 690V, making it suitable for high-demand industrial power distribution environments requiring robust fault protection.

OEM Intelligent Universal Circuit Breaker SJKW1-2000 from China Suppliers | Factory Direct, Overload & Short-Circuit Protection Manufacturers, Companies

Product Description

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