ACB
ACB Air Circuit Breaker
KW2 Air Circuit Breaker provides protection of overload, short circuit and single phase earth with intelligent and selective protection function, the breaker can improve the reliability of power supply and avoid unnecessary power fail. It's applicable for power stations, factories, and modem high-buildings, etc., especialy for the distribution system of intelligent building.
Product type: Air Circuit Breaker
Product series: KW2
Product application: High current power circuit protection
Number of poles: 3P, 4P
Applicable category: B
Rated current (ln): 400-4000A
Rated operating voltage (Ue): AC240V / 400V / AC500V / 690V
Rated insulation voltage (Ui): AC1000V
Rated impulse withstand voltage (Uimp): 12KV
Tripping unit: Electronic intelligent controller
Communication：Modbus RS485 (Optional)
Breaking capacity:
KW2-4000
AC240V/400V，Icu=120kA Ics=100kA Icw=100kA,1s / 85kA,3s
AC690V Icu=85kA Ics=85kA Icw=85kA,3s
KW2-1600
AC240V/400V，Icu=65kA Ics=50kA Icw=50kA,1s
AC690V Icu=35kA Ics=35kA Icw=35kA, 3s
Standard: IEC 60947-2, EN 60947-2, IEC 60947-3, EN 60947-3, GB/T 14048.2, AS/NZS 60947.2
Certificate: CCC CE CB
The circuit breaker can be racked in/out of the chassis with three position locking:
Time Delayed Short Circuit Protection Characteristic
Adjustable Setting
1. Overload Current setting (Ir)
2. Overload Long-Delay Time (t1)
3. Short-circuit Current setting (Is)
4. Short-circuit Short-Delay Time (t2)
5. Instantaneous Trip Current setting (Isd)
Ground Fault Protection Characteristics (Optional)
1. Ground Fault Current setting (Ig)
2. Ground Fault Delay Time (t3)
3. Alarm and no-break Function (Optional)
Residual Earth Leakage Protection Characteristics (Optional)
1. Residual Earth Leakage Current setting (I△n)
2. Residual earth leakage Delay Time (t△n)
Loads monitoring
- Programmable control unit monitors the loads to ensure power supply.
- Two types of monitoring for option. The current thresholds are Ic1 and Ic2. normally Ic1 ≥ Ic2.
Control unit time/current characteristics curves
2000A
Control unit time/current characteristics curves
5000A
| Type | KW2-1600 | KW2-4000 | ||||||
| Frame size Inm(A) | 1600 | 4000 | ||||||
| Rated current In(A) | 200/315/400/630/800/1000/1250/1600 | 800/1000/1250/1600/2000/2500/3200/4000 | ||||||
| Rated operation voltage Ue(V) | AC 240/400/500/690V 50/60Hz | |||||||
| Rate insulation voltage Ui(V) | AC 1000 | |||||||
| Rated Impulse withstand voltage Uimp(V) | 12000 | |||||||
| Power frequency withstand voltage(V) | AC 2500V 1min 50Hz | |||||||
| Number of pole | 3/4 | |||||||
| N pole rate current In(A) | 100%In | |||||||
| Utimate breaking capacity Icu(kA)VAC50/60Hz | 240/400V | 65 | 100 | |||||
| 500/690V | 35 | 85 | ||||||
| Rated operating breaking capacity Ics(kA)VAC 50/60Hz | 240/400V | 50 | 100 | |||||
| 500/690V | 35 | 85 | ||||||
| Rate making capacity(Peak) Icm(KA) |
240/400V | 143 | 187 | |||||
| 500/690V | 143 | 220 | ||||||
|
Rate short-time withstand current (1s/3s)Icw(kA) |
50/35 | 100/85 | ||||||
| Intelligent control Unit | ST3.0/3.2H | |||||||
| No of operationg cycles |
Electricallife | 6000 | 2000 | |||||
| Mechacnciallife | without maintenance | 10000 | 10000 | |||||
| with maintenance | 20000 | 20000 | ||||||
| Connection Type | Terminals | Horizontal | Vertical | Horizontal | Vertical | |||
| Draw-out Type | O | O | O | O | ||||
| FixType | O | O | O | O | ||||
| Size H×W×D | 3P Draw-out Type | 350(H)×282(W)x 300(D) | 430(H)x407(W)×395(D) | |||||
| 4P Draw-out Type | 350(H)×352(W)x 300(D) | 430(H)×512(W)×395(D) | ||||||
| 3P Fixed Type | 350(H)×266(W)x200(D) | 393(H)x422(W)×290(D) | ||||||
| 4P Fixed Type | 350(H)×336(W)x200(D) | 393(H)×537(W)×290(D) | ||||||
Long-time overload protection (IDMTL setting)
Short-time Short-circuit protection
Instantaneous protection against short-circuit characteristic
Earthfaults protection characteristic
Residual earthleakage protection characteristic
Load Monitoring Characteristics
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