Huanghua Group Co., Ltd. 
HKW1 Series Air Circuit Breaker (ACB)
Product Overview
The HKW1 series universal circuit breakers are suitable for distribution networks with AC 50Hz, rated voltage up to 660V (690V) and below, and rated current of 630A-6300A. They are used to distribute electrical energy and protect lines and power equipment from overload, undervoltage, short circuit,single-phase grounding and other faults. The circuit breaker has intelligentprotection function; Selective protection is precise, which can improve power supply reliability and avoid unnecessary power outages.
Rated working voltage: AC690V and below
Installation method: drawer type, fixed type
Intelligent controller: H type (for communication), M type (ordinary intelligent type),
L type (economic type)
Breaking capacity: 80kA, 100kA (effective value)
Number of product poles: 3, 4
Product frame: 2000, 3200,4000,6300A
Tripping method: a variety of intelligent trippers, providing different functions
Rated current: 630A–6300A
Implementation standard: IEC60947-2, GB/T14048.2
Model Meaning
Classification
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Classified by installation method:Fixed type /Drawer
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Divided by number of poles: three poles, four polesA Classified by operation method: Electric operation/Manual operation (for maintenance and repair)
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Release type: Intelligent controller, undervoltage instantaneous (or delayed) release, shunt release.
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Intelligent controller performance
a.Intelligent controllers are divided into H-type (communication), M-type (ordinary intelligent, and L-type (economic);
b. It has functions such as long delay inverse time, short delay inverse time, fixed time, and instantaneous. The required protection
characteristics can be set by the user;
c.Single phase grounding protection function;
d. Display function:Setting current display.Action current display. Display of voltage values for each line(Voltage display should be
provided during ordering);
e.Alarm function: overload alarm;
f.Self checking function: overheat self checking, microcomputer self diagnosis;
g.Test function: Test the action characteristics of the controller.
Product Introduction
| Product Introduction | HKW1 series ACB is suitable for AC 50Hz distribution networks with rated operational voltage up to 690V and rated current 400–6300A. It distributes electrical energy and protects lines and power equipment against overload, short-circuit and earth fault. |
| Key Highlights | High breaking capacity: Icu up to 80–100kA at 400V, ensuring safe interruption under extreme short-circuit conditions.Zero flashover: no external arcing, improving switchgear and personnel safety.
Intelligent adjustable protection: H/M/L controllers with fully adjustable LSI + ground fault protection, load monitoring and thermal memory. H-type with communication enables remote metering, signaling, control and setting ("Four Remotes"). |
| Main Advantages | High reliability: verified 100kA breaking capacity and short-time withstand current for high short-circuit capacity systems.Flexible installation: fixed/drawer type, 3/4 poles, electric/manual operation to fit various switchgear.
Intelligent diagnostics: self-check, overload pre-alarm, fault records and test functions for easy maintenance. Environmental adaptability: -5℃~+40℃, altitude ≤2000m, IP30, utilization category B. |
| Typical Applications | Power plants, substations, industrial & mining enterprises, data centers, commercial buildings and renewable energy systems — for incoming, bus-tie and feeder protection in low-voltage distribution. |
Product Features
| Feature | Description |
| Intelligent adjustable protection | Equipped with H/M/L intelligent controllers; long-time inverse, short-time, instantaneous and single-phase earth protection are all user-settable with accurate and reliable characteristics. |
| High breaking capacity | Icu up to 80kA (frame 2000A) / 100kA (3200/4000/6300A) at 400V, 50kA at 690V; same breaking capacity for upper and lower line incoming. |
| Zero flashover | External flashover distance is zero — no arc expulsion during breaking, improving switchgear and operator safety. |
| H-type communication | Based on all M-type functions, adds a serial communication interface to form a master-slave LAN enabling the "Four Remotes" (telemetering, telesignaling, telecontrol, telestting). |
| M-type functions | Ammeter, voltmeter, remote monitoring, self-diagnosis, overload/earth/short-circuit/pre-alarm and trip indication outputs (contact rating DC28V/1A, AC125V/1A). |
| Hot memory | After overload or short-delay tripping, simulates bimetal characteristics to memorize overload energy (released in 30 min); trip time is shortened if a fault recurs. |
| Load monitoring | Two setpoints ILC1/ILC2: trip non-essential loads when current approaches overload setting, or auto-reclose them when current drops — protecting the main circuit and essential loads. |
| MCR protection | MCR instantaneous and simulated trip protection can be enabled/disabled as required, mainly for fault-closing at controller power-on, with direct trip signal under extremely high short-circuit current. |
| Test function | Set/+/−/Trip/No-trip/Reset keys allow simulated fault-current testing of all protections for factory test and on-site maintenance. |
| Operating environment | Ambient -5℃~+40℃ (24h avg ≤+35℃), altitude ≤2000m, RH ≤50% at +40℃, IP30, utilization category B. |
Product Parameters
| Parameter | Value/Spec |
| Product series | HKW1 series Air Circuit Breaker (ACB) |
| Rated operational voltage Ue | AC 400V / 690V |
| Rated frequency | 50Hz |
| Rated frame current Inm | 2000 / 3200 / 4000 / 6300 A |
| Rated current In | 2000 frame: 400/630/800/1000/1250/1600/2000A; 3200 frame: 2000/2500/2900/3200A; 4000 frame: 3200/3600/4000A; 6300 frame: 4000/5000/6300A |
| Number of poles | 3P / 4P |
| Installation | Fixed / Drawer |
| Operation | Electric / Manual (for maintenance) |
| Icu (400V) | 80kA (2000 frame) / 100kA (3200/4000/6300 frame) |
| Icu (690V) | 50kA |
| Ics (400V) | 65kA (2000/3200/4000 frame) / 100kA (6300 frame) |
| Icw (400V,0.4s) | 50kA(2000) / 80kA(3200) / 65/80kA(4000,MCR) / 85/100kA(6300,MCR) |
| Flashover distance | Zero (No external flashover) |
| Protection degree | IP30 |
| Utilization category | B |
| Controller type | H-type (communication) / M-type (general intelligence) / L-type (economic) |
| Protection characteristics | Long delay inverse time + short delay + instantaneous + single-phase ground fault (LSI) + adjustable |
| Max. power consumption | 360W |
| Operating ambient temp. | -5℃ ~ +40℃ (24-hour average ≤ +35℃) |
| Altitude | ≤2000m |
| Mounting inclination | The vertical inclination of the circuit breaker shall not exceed 5°. |
Installation and external dimensions
(HKW1-2000,2000/4)
| In | a mm | b mm | e mm |
| 400‑800A | 10 | 95 | 38 |
| 1000‑1600A | 15 | 105 | 48 |
| 2000A | 20 | 115 | 58 |
(HKW1-3200,3200/4)
| In | a mm | b mm | e mm |
| 2000A、2500A | 20 | 115 | 58 |
| 2900A、3200A | 30 | 135 | 78 |
(HKW1-2000,2000/4)
| In | a mm | e mm |
| 400‑800A | 10 | 38 |
| 1000‑1600A | 15 | 48 |
| 2000A | 20 | 58 |
(HKW1-3200,3200/4)
| In | a mm | b mm | c mm | d mm | e mm |
| 2000A、2500A | 20 | 115 | 506 | 552 | 23 |
| 2900A、3200A | 30 | 135 | 526 | 572 | 43 |
