WOODWARD LS-5 Series | LS-521 V2 Circuit Breaker Control

WOODWARD LS-5 Series | LS-521 V2 (Option K12)Circuit Breaker Control

Basic Information

Product Model LS-521 V2 (Option K12)

Core positioning: Circuit breaker closing/opening control, dual system synchronous monitoring, fault alarm and log recording

Suitable for generator circuit breaker (GCB) and grid circuit breaker (MCB) control

Certification qualifications UL/cUL (ordinary area), CE, Lloyd's (ENV1/ENV2), ABS classification certification

System hardware and interface configuration

(1) Core interface parameters

Interface type specification details

The input voltage range of the power supply is 8-40Vdc, with a power consumption of about 6W; it is recommended to series connect a 6A slow melting fuse

Voltage measurement (dual system) supports 3Ph4W/3Ph3W/1Ph3W/1Ph2W wiring; Measurement range: 120Vac (0-150Vac), 480Vac (0-600Vac)

Current measurement (System A) supports L1/L2/L3 three-phase or single phase to ground measurement; CT input 1A/5A optional

Discrete Input (DI) with 8 channels and optical isolation design; Supports NO/NC configuration, input voltage 8-40Vdc, input resistance approximately 20k Ω

Relay output (DO) 6 channels, passive contacts; Universal load 2A@250Vac / 2A@24Vdc ， Piloted load 1A@24Vdc

Communication interface CANopen: default 125kBaud, maximum transmission distance 2500m (20kBaud); RS-232: default 19.2kBd, supports ToolKit configuration

(2) Structure and environmental specifications

Category specific parameters

Shell structure made of plastic material, dimensions 219 (width) × 171 (height) × 61 (depth) mm; panel opening 186 × 138mm

Protection level IP66 (screw installation), IP54 (fixture installation), IP20 (back)

Weight approximately 850g

Working environment temperature -20 ° C~70 ° C, storage temperature -30 ° C~80 ° C; humidity 95%, no condensation (85% when ≤ 40 ° C)

Anti interference performance vibration: 5-100Hz sine sweep frequency (4G), 10-500Hz random vibration (1.04Grms); Shock: 40G sawtooth wave pulse (11ms)

Core functions and operations

(1) Core control function

Circuit breaker control: supports the closing/opening control of one circuit breaker (CBA), and can be configured with one or two relay drivers; Closed pulse width 0.1-0.5s, open pulse width 0.1-9.9s

Synchronous grid connection control: Monitor the voltage difference (maximum 20% rated voltage), frequency difference (± 0.49Hz), and phase difference (maximum 20 °) between system A and system B. When the conditions are met, trigger grid connection and support transformer phase compensation (-180 °~180 °)

Dead bus closure: supports closure control for both A/B dual systems in dead and one dead/active scenarios; Dead bus detection threshold 0-30% rated voltage, delay time 0-20s

Phase sequence monitoring: Support system A/B phase sequence detection (CW/CCW), block circuit breaker closure and alarm when phase sequence mismatch occurs

(2) Configuration and operation mode

Configuration Method Operation Path Core Function

Front panel buttons+LCD display screen parameter viewing, mode switching (automatic/manual), circuit breaker manual control, alarm confirmation

ToolKit software PC installation (supports Windows 7/8.1/10) full parameter configuration, logic programming (LogicsManager), data trend monitoring, event log export

(3) Alarm and Log

Alarm level: Level 6 alarm (A-F), Level A/B warning (no trip), Level C-F shutdown (immediately disconnect the circuit breaker)

Event log: 300 FIFO storage records alarm triggering/recovery, operation status changes (such as automatic/manual switching, circuit breaker action), supports manual clearing

Key configuration parameters

(1) Password and permission grading

Default password for permission level, core permissions

CL0 (user level) does not only view data, set language/time

CL1 (Service Level) 0001 modifies non critical parameters (such as units, alarm reset time)

CL3 (debugging level) 0003 full parameter configuration, factory reset, logic programming

(2) Example of Core Configuration Parameters

Parameter Category Key Parameters Default Value Configuration Range

Synchronous control voltage difference threshold 5.00% 0.50-20.00%

Frequency difference threshold (positive/negative) ± 0.18Hz -0.49-0.49Hz

Phase difference threshold 20 ° 0-20 °

Dead Bus Control Dead Bus Detection Threshold 10% 0-30%

Dead bus closure delay 5.0s 0.0-20.0s

Communication configuration CANopen baud rate 125kBaud 20-1000kBaud

RS-232 baud rate 19.2kBd 2.4-115kBd