EBW1 Intelligent Air Circuit Breaker (ACB)

The EBW1 series intelligent air circuit breakers (ACB) are designed for AC 50Hz power systems with rated voltages of 400V and 690V, and rated currents ranging from 630A to 6300A.They are mainly used for power distribution and for protecting circuits and electrical equipment from overload, short circuit, undervoltage, and single-phase grounding faults.Equipped with an intelligent trip unit, the EBW1 ACB provides precise and selective protection, helping to prevent unnecessary power outages and ensuring a stable and reliable power supply.This series fully complies with IEC 60947-1&nbsp...

Inquiry

E-mail：sales@vcbbreaker.com

WhatsApp：8613736779975

Detailed Description
Product Encyclopedia

The EBW1 series intelligent Air Circuit Breakers (ACB) are designed for AC 50Hz Power Systems with rated voltages of 400V and 690V, and rated currents ranging from 630A to 6300A.

They are mainly used for power distribution and for protecting circuits and electrical equipment from overload, short circuit, undervoltage, and single-phase grounding faults.

Equipped with an intelligent trip unit, the EBW1 ACB provides precise and selective protection, helping to prevent unnecessary power outages and ensuring a stable and reliable power supply.

This series fully complies with IEC 60947-1 and IEC 60947-2 standards.

Operating Conditions

Ambient temperature: -5°C to +40°C (average temperature within 24 hours not exceeding +35°C)

Altitude: ≤2000 m

Pollution degree: Class 3

Humidity: Relative humidity should not exceed 50% at +40°C; higher humidity levels are permissible at lower temperatures (up to 90% at +20°C).
When condensation occurs, appropriate protective measures should be taken.

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

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

EBW1 Intelligent Air Circuit Breaker – High-Current ACB with Selective Protection for Industrial Power Systems

EBW1 intelligent air circuit breaker with digital trip unit and draw-out mechanism

The EBW1 Intelligent Air Circuit Breaker (ACB) is engineered for demanding low-voltage power distribution applications, supporting rated voltages of 400V and 690V with current ratings from 630A to 6300A. Designed for industrial plants, commercial complexes, and utility substations, it provides comprehensive protection against overload, short circuit, undervoltage, and ground faults—ensuring uninterrupted and Safe Operation of critical electrical infrastructure.

Equipped with a microprocessor-based intelligent trip unit, the EBW1 delivers precise, adjustable, and selective tripping characteristics that minimize nuisance outages while maintaining system coordination. Its full compliance with IEC 60947-1 and IEC 60947-2 guarantees global reliability and interoperability. The breaker operates reliably in ambient temperatures from -5°C to +40°C and at altitudes up to 2000 meters, making it suitable for diverse environmental conditions.

Selective low-voltage ACB – enables tiered protection in complex distribution networks
High-current intelligent breaker – scalable up to 6300A with digital monitoring capabilities
Draw-out type ACB design – simplifies maintenance and enhances operational safety

Available in both fixed and draw-out configurations (3P/4P), the EBW1 series offers high breaking capacities—up to 120kA at 400V—and ultra-fast interruption within 20–30 ms. Low contact resistance (as low as 10 μΩ in draw-out models) ensures minimal energy loss and heat generation. Optional accessories like shunt releases, under-voltage coils, and motorized operators support remote control and smart grid integration. With a mechanical life of up to 10,000 operations and robust construction meeting Pollution Degree 3 standards, the EBW1 ACB delivers long-term performance, safety, and energy efficiency for modern power systems.