China SJKW1-2000 intelligent universal circuit breaker Manufacturer, Companies

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China SJKW1-2000 intelligent universal circuit breaker Manufacturer, Companies

Designed for 50Hz AC distribution networks (up to 690V, 200A-6300A), this Air Circuit Breaker provides overload, short-circuit, undervoltage, and ground-fault protection. Its intelligent selective protection enhances power reliability, while open communication interfaces enable remote control for automation systems. Rated for altitudes ≤2000m (8kV impulse withstand voltage), it also functions as an isolator without controllers. Combines precision protection with smart grid compatibility.

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Product Description

Type Designation

SJKW1-2000-intelligent-universal-circuit-breaker-(2)

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 as 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 - normally open, b - normally closed)

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-(1)

W1-ACB-intelligent-universal-circuit-breaker-(4)

SJKW1-2000-intelligent-universal-circuit-breaker-(4)

SJKW1-2000-intelligent-universal-circuit-breaker-(5)

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)	-	50Hz	50Hz	50Hz	50Hz	50Hz
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

Q: What frame sizes and rated current ranges are covered by the SJKW1 series?

The series offers 5 frame sizes ranging up to 6300A: the 1600 type (200A–1600A), 2000 type (630A–2000A), 3200 type (2000A–3200A), 4000 type (2500A–4000A), and 6300 type (4000A–6300A).

Q: What is the main distinction between M type and H type intelligent controllers?

Both M type and H type provide comprehensive over-current protection (overload, short delay, and instantaneous). The H type uniquely adds integrated communication functionality, available with either a digital display (2H) or LCD screen (3H).

Q: Which installation options and pole configurations are available?

The circuit breakers are configured as either 3-pole (standard default) or 4-pole units. Both fixed and drawout installation configurations are supported, and each can be installed horizontally or vertically.

Q: What are the ultimate short-circuit breaking capacity (Icu) ratings at 400V?

At AC400V, the ultimate short-circuit breaking capacity (Icu) is 65kA for the 1600 type, 85kA for the 2000 type, 100kA for both 3200 and 4000 types, and reaches up to 120kA for the 6300 frame size.

Q: Are mechanical interlocks supported for dual or triple circuit breaker installations?

Yes, optional mechanical interlocking solutions include 1 lock + 1 key for single units, steel cable or connecting rod interlocks (2 locks + 1 key) for two circuit breakers, and connecting rod interlocks (3 locks + 2 keys) for three circuit breakers.

Q: What control voltages are supported for common accessories like shunt and closing coils?

Common accessories such as shunt release, closing electromagnet, and motor-driven energy-storage mechanisms support versatile operating voltages of AC220V/230V, AC380V/400V, DC220V, and DC110V.

China SJKW1-2000 intelligent universal circuit breaker Manufacturer, Companies

Product Description

Type Designation

② Number of Poles

③ Installation

④ Intelligent Controller

⑤ Common Use Accessory

⑥ Optional Accessory

Product Display

Technical Parameters

Installation and Overall Dimensions

Frequently Asked Questions

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