Wenzhou Laike Electric Co.,Ltd.
Introduce
LKW1 series intelligent air circuit breakers (hereinafter called ACB) are applied for the network circuit of AC 50Hz, rated voltage 400V, 690V and rated current between 630A and 6300A. Mainly used for distributing energy and protecting the circuit and power supply device against short-circuit,
undervoltage, single-phase ground fault, etc. The ACB has intelligent protection function and the key parts adopt intelligent release. The release canmake the accurate selective protection, which can avoid cutting off the power and improve the reliability of power supply. The products conform with IEC60947-1,IEC60947-2 standards.
Type designation
1.Rated current in scope of frame current
2000 Type-in: 630A, 800A, 1000A, 1250A, 1600A, 2000A;
3200 Type-in: 2000A, 2500A, 3200A;
6300 Type-in: 4000A, 5000A, 6300A;
2.Pole number
3-default, 4-4 pole
3.Installation
Fixed type-horizontal, vertical
Draw out type-horizonal, vertical
Note: 2000 type have vertical wiring, others are horizontal wiring
4.Control unit
L type-dial switch mode, over-current protection (overload, short delay,
instantaneous).
2M type-digitaldisplay,over-current protection (overload, shortdelay,
instantaneous), 4P or 3P+N have earthing protection (3M type is LCD display).
2H type-communication function, digital display, over-current protection
(overload, short delay, instantaneous), 4P or 3P+N have earthing protection (3H
type is LCD display).
5.Common use accessory
Closing electromagnet-AC230V, AC400V, DC220V
Undervoltage release-AC230V, AC400V, undervoltage instantaneous,
undervoltage time-delay
Release (close) magnetic iron-AC230V, AC400V, DC220V
Electric operation mechanism-AC230V, AC400V, DC110V, DC220V
Auxiliary contact-standard type (4a4b), special type (5a5b, 6a6b)
Note: a-normal open, b-normal close
6.Optional accessory
Mechanical inter-lock:
one circuit breaker (1lock+1key)
two circuit breaker (steel cable inter-lock, connecting rod inter-lock, 2lock+1key)
three circuit breakers (3locks+2keys, connecting rod inter lock)
Automatic power transfer system
Current transformer connected with neutral lead
Operation Conditions
| Operating conditions | |
| Item | Description |
| Ambient temperature | -5℃~+40℃ (except special order products) |
| Altitude | ≤2000m |
| Pollution grade | 3 |
| Safety category | Main circuit and undervoltage tripping coil is IV, other auxiliary and control circuit is III |
| Installation position | Vertical installed, tilt not exceed 5 degree |
| Environmental protection | Most of parts use recyclable and degradable materials |
| Isolating function | With isolating function |
Specifications
Curves
Data
| Type | LKW1-2000 | LKW1-3200 | LKW1-6300 | ||
| Pole | 3P, 4P | 3P, 4P | 3P, 4P | ||
| Using category | B | B | B | ||
| Rated current In | A | 630, 800, 1000，1250, 1600, 2000 | 2000, 2500, 3200 | 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 |
| 660V | kA | 40 | 50 | 75 | |
| Rated limiting short circuit | 400V | kA | 80 | 80 | 120 |
| breaking capacity Icu (O-t-CO) | 660V | kA | 50 | 65 | 85 |
| 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 |
| 4P | W | 450 | 1750 | 2300 | |
| Resistance of each pole | Fixed type | μΩ | 11 | 9 | - |
| 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 | |||
Overload protection data
| Overload protection | LKW1-2000~6300 | ||||||
| Adjust scope Ir1 | (0.4-1)In (pole difference 2%) | ||||||
| 1.05 Ir1 | h | 2h non-tripping | |||||
| 1.3 Ir1 | h | ≤1h tripping | |||||
| 1.5 Ir1 | s | 15 | 30 | 60 | 120 | 240 | 480 |
| 2.0 Ir1 | s | 8.4 | 16.9 | 33.7 | 67.5 | 135 | 270 |
| Accuracy | % | ±15 | |||||
| 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 | % | ±15 |
| Short circuit, instantaneous | ||||
| LKW1-2000 | LKW1-3200 | LKW1-6300 | ||
| Adjust scope Ir1 Ir3 | 1In-50kA | 1In-75kA | 1In-100kA | |
| Accuracy | % | ±15 | ±15 | ±15 |
| Load monitoring output | LKW1-2000~6300 | |
| Load adjust scope Ic1 | (0.2-1)In (pole difference 2%) | |
| Delay time tc1 | tr1 ×0.5 | |
| Load adjust scope Ic2 | (0.2-1)In (pole difference 2%) | |
| Delay time tc2 | tr1 ×0.25 (anti-time limit) | |
| Accuracy | s | 60 (set time limit) |
| % | ±10 | |
Overall and mounting dimensions
Installation and figure dimension of LKW1-2000A fixed type circuit breaker
Installation and figure dimension of LKW1-3200A fixed type circuit breaker
Installation and figure dimension of LKW1-4000A fixed type circuit breaker
Installation and figure dimension of LKW1-6300A fixed type circuit breaker
Installation and figure dimension of LKW1-2000A draw-out type circuit breaker
Installation and figure dimension of LKW1-3200A draw-out type circuit breaker
Installation and figure dimension of LKW1-4000A draw-out type circuit breaker
Installation and figure dimension of LKW1-4000A(4P) draw-out type circuit breaker
Installation and figure dimension of LKW1-6300A draw-out type circuit breaker
Installation and figure dimension of draw-out type circuit breaker (Inm=3200A 3P 4P)
Dimension of panel hole see picture and table Unit:mm
Interlock device of circuit breaker see picture Unit:mm
Interlock device of vertical install circuit breaker
Interlock device of horizontal install circuit breaker
Characteristic of intelligent controller
| Basic function | |
 | Overload longtime-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 |
| Testing function | ||
| Panel key | Tripping | Test the time current characteristic of release and situation of operation device |
| Remote monitoring function | Non-tripping | Test the time current characteristic of release |
| Remote monitoring code signal optocoupler | Relay (contain power) module | Output of various working condittion |
| Communication function | ||
| Communicate type | RS485(communication) I/O | User should consult with the manufacturer |
| 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 (WFW1-1000 5VA) |
| Shunt release | Rated control power voltage Us(V) | AC400 AC230 DC220 DC110 |
 | Acting voltage (V) | (0.7~1.1) Ue |
| Power loss | 40VA 40W (WFW1-1000 5VA) | |
| Open time | less than 30ms |
| Close electromagnetic iron | Rated control power voltage Us(V) | AC400 AC230 DC220 DC110 |
 | Acting voltage (V) | (0.85~1.1) Ue |
| Power loss | 40VA 40W (WFW1-1000 5VA) | |
| Open time | less than 70ms |
| Motor operating device | Rated control power voltage Us(V) | AC400 AC230 DC220 DC110 |
 | Acting voltage (V) | (0.85~1.1) Ue |
| Power loss | 40VA 40W (WFW1-1000 5VA) | |
| Open time | less than 5s |