EBW1 Universal Air Circuit Breaker (ACB)

The EBW1 Universal Circuit Breaker is an intelligent air circuit breaker (ACB) designed for AC 50Hz networks with rated voltages of 400V and 690V, and rated currents from 630A up to 6300A.It is widely used in low-voltage power distribution systems to ensure safe and efficient energy distribution, as well as to protect circuits and equipment from overload, short circuit, undervoltage, and single-phase grounding faults.Equipped with an intelligent electronic trip unit, the EBW1 ACB provides accurate and selective protection, preventing unnecessary power interruptions and enha...

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Detailed Description
Product Encyclopedia

The EBW1 Universal Circuit Breaker is an intelligent Air Circuit Breaker (ACB) designed for AC 50Hz networks with rated voltages of 400V and 690V, and rated currents from 630A up to 6300A.
It is widely used in low-voltage power distribution systems to ensure safe and efficient energy distribution, as well as to protect circuits and equipment from overload, short circuit, undervoltage, and single-phase grounding faults.

Equipped with an intelligent electronic trip unit, the EBW1 ACB provides accurate and selective protection, preventing unnecessary power interruptions and enhancing the reliability of power supply systems.
The main components adopt advanced intelligent release technology, ensuring stable performance under complex working environments.

The EBW1 series fully complies with IEC 60947-1 and IEC 60947-2 standards, making it suitable for use in industrial, commercial, and infrastructure applications where reliability and precision protection are essential.

Operating Conditions

Ambient temperature: -5°C to +40°C (average within 24 hours ≤ +35°C)

Altitude: ≤ 2000 m

Pollution degree: Class 3

Humidity: ≤ 50% at +40°C; higher humidity levels are acceptable at lower temperatures (up to 90% at +20°C).
When condensation is likely to occur, appropriate anti-moisture measures should be applied.

Main technical parameter

Type			EBW1-2000	EBW1-3200	EBW1-6300
Pole			3P, 4P	3P, 4P	3P, 4P
Using category			B	B	B
Rated current In		A	630, 800, 1000 1250, 1600, 2000	2000, 2500, 3000	4000, 5000, 6300
Rated frequency		Hz	50	50	50
Rated operation voltage Ue		V	400, 690	400, 690	400, 690
Rated insulation voltage Ui		V	800	800	800
Arcing distance		mm	0	0	0
Rated impulse withstanding voltage Uimp		V	8000	8000	8000
Rated operation short circuit breaking capacity Ics (O-t-CO)	400V	kA	50	80	100
	690V	kA	40	50	75
Rated limiting short circuit breaking capacity Icu (O-t-CO)	400V	kA	80	100	120
Rated limiting short circuit breaking capacity Icu (O-t-CO)	690V	kA	50	65	85
Rated short circuit closing capacity Icm	400V	kA	176	220	264
Rated short circuit closing capacity Icm	690V	kA	105	143	187
Rated short time withstanding current Icw (O-t-CO, AC400V 0.4S)	400V	kA	50	65	85
Operation life	Per hour	times	20	20	10
	Electrical	times	1000	500	500
	Mechanical	times	10000	5000	5000
Full breaking time		ms	20~30	20~30	20~30
Full closing time		ms	55~70	55~70	55~70
Power consumption	3P	W	360	1200	2000
Power consumption	4P	W	450	1750	2300
Resistance of each pole	Fixed type	μΩ	11	9	-
Resistance of each pole	Draw out type	μΩ	20	14	10
Dimensions (L×W×H)	3P fixed type	mm	362×323×402	422×323×402
	3P draw out type	mm	375×461×452	435×471×452
	4P fixed type	mm	457×323×402	537×323×402
	4P draw out type	mm	470×461×452	550×471×452
Approximate weight	3P fixed type	kg	41	55
	3P draw out type	kg	71	95	245
	4P fixed type	kg	51.5	65	-
	4P draw out type	kg	86	115	260

Overload protection data

Overload protection		EBW1-2000~6300
Adjust scope Ir1		(0.4-1)In (pole difference 2%)
1.05 Ir1	h	≥2h non-tripping
1.3 Ir1	h	≤1h tripping
Delay time tr1 when current is 2.0 In	s	3.32, 5.32, 8.00, 13.3, 20, 26.6, 33.3, 45, 60, 93.3, 133, 200, 266, 333, 400, 433
Delay time tr1 when current is 3.0 In	s	1.25, 2, 3.5, 7.5, 10, 12.5, 16.8, 22.5, 35, 50, 75, 100, 125, 150, 162
Accuracy	%	±10

Short circuit, short time delay
Adjust scope Ir1 Ir2		(0.4-15)In (pole difference 2%)
Delay time tr2	ms	100, 200, 300, 400
Accuracy	%	±10

Characteristic of intelligent controller

	Overload long time-delay anti-time limit protection
	Short circuit short time-delay anti-time limit protection
	Short circuit short time-delay timing protection
	Short circuit instantaneous protection
	Insulate earth fault protection

Electrical accessories

Under-voltage release	Rated working voltage Ue(V)	AC400 AC230
	Acting voltage (V)	(0.35~0.7) Ue
	Reliable close voltage (V)	(0.85~1.1) Ue
	Non close voltage (V)	≤0.335Ue
	Power loss	12VA (EBW1-1000 5VA)

Shunt release	Rated control power voltage Us(V)	AC400 AC230 DC220 DC110
	Acting voltage (V)	(0.7~1.1) Ue
	Open time	40VA 40W (EBW1-1000 5VA)
	Power loss	less than 30ms

Close electromagnetic iron	Rated control power voltage Us(V)	AC400 AC230 DC220 DC110
	Acting voltage (V)	(0.85~1.1) Ue
	Open time	40VA 40W (EBW1-1000 5VA)
	Power loss	less than 70ms

Motor operating device	Rated control power voltage Us(V)	AC400 AC230 DC220 DC110
	Acting voltage (V)	(0.85~1.1) Ue
	Open time	40VA 40W (EBW1-1000 5VA)
	Power loss	less than 5s

The EBW1 Universal Circuit Breaker is a high-performance Air Circuit Breaker (ACB) engineered for modern low-voltage power distribution systems. Designed for AC 50Hz networks with rated voltages of 400V and 690V, it supports rated currents ranging from 630A to 6300A, making it ideal for demanding industrial, commercial, and infrastructure applications. This advanced ACB delivers comprehensive protection against overload, short circuit, undervoltage, and ground faults, ensuring operational continuity and equipment safety.

Featuring an intelligent electronic trip unit, the EBW1 provides precise, selective fault detection and response, minimizing unnecessary outages and enhancing overall system reliability. Its core components leverage cutting-edge intelligent release technology, enabling stable performance even in harsh or fluctuating environments. Fully compliant with IEC 60947-1 and IEC 60947-2 international standards, this circuit breaker meets the highest benchmarks for safety and efficiency.

Whether deployed in data centers, manufacturing plants, or utility substations, the EBW1 series offers exceptional breaking capacity—up to 120kA at 400V—and fast response times (full breaking within 20–30 ms). With options for fixed or draw-out mounting and support for both 3P and 4P configurations, it delivers flexible integration into diverse electrical architectures. Backed by robust environmental tolerance (operating from -5°C to +40°C, up to 2000m altitude, pollution degree 3), the EBW1 ensures dependable service under real-world conditions.