Woodward easyYgen LS-6XT series circuit breaker control unit

Basic Information

Product model easyYgen LS-6XT series (representative model LS-612XT-P1/P2)

Core positioning circuit breaker control, dual system synchronous monitoring, fault alarm, logic expansion

Adaptation target engine generator set (GCB/MCB/GGB control)

Certification qualifications UL/cUL, 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. It is recommended to connect a 6A slow melting fuse in series, with a power consumption of about 6W

Voltage measurement (dual system) supports 3Ph4W/3Ph3W/1Ph3W/1Ph2W wiring; Measurement range 120/480/690Vac (PT secondary side)

Current measurement (dual system) supports L1/L2/L3 three-phase or single phase to ground measurement; CT input 1A/5A optional, system A occupies 6 terminals, system B occupies 2 terminals

Discrete Input (DI) 12 channel optical isolation, input voltage 8-40Vdc, supports NO/NC configuration; Can be extended to 32 channels (P2 model) through IKD module

Discrete Output (DO) 12 way relay, passive contacts, universal load 2A@250Vac /24Vdc； Can be extended to 32 channels (P2 model) through IKD module

Analog input (AI) 3 channels, supporting 0-2000 Ω (resistance type), 0/4-20mA (current type), 0-1V (voltage type), supporting Pt100/Pt1000/VDO sensors

Analog output (AO) 2 channels, supporting ± 20mA, ± 10V, PWM output, galvanic isolation, configurable filtering time constant

Communication interface RS-485: supports half/full duplex, with maximum transmission distance dependent on baud rate; USB 2.0: Service port, ToolKit connection; CAN Bus: Supports CANopen, up to 2500m (20kBaud); Ethernet: 3 RJ-45 ports, supporting 10/100Base-T, maximum transmission of 100m

(2) Structure and environmental specifications

Category specific parameters

The shell structure is made of metal material, with dimensions of 227 (width) x 250 (height) x 50 (depth) mm; the panel openings must comply with the drill plan

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

Environmental tolerance working 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 of CBA (main circuit breaker) and CBB (backup circuit breaker), can be configured with pulse (0.1-9.9s) or continuous output mode, supports automatic unlocking (Pre open pulse) function

Synchronous grid connection control: Monitor the voltage difference (0.50-20.00%), frequency difference (± 0.49Hz), and phase difference (± 60 °) of the dual systems, trigger grid connection after meeting the conditions, and support phase compensation (-180 °~180 °)

Dead bus closure: supports both A/B dual systems to be dead, one dead and one active scenario closure, detection threshold 0-30% rated voltage, delay 0-20s, supports multi device negotiation mechanism

Load transfer: Supports four modes: Open Transition, Closed Transition, Interchange, and Parallel

Fault decoupling: Monitor thresholds such as over/under frequency, over/under voltage, phase offset, df/dt, etc., and automatically disconnect the designated circuit breaker (CBA/BBB or both) upon triggering

(2) Programming and configuration methods

Configuration Method Operation Path Core Function

Local operation front-end panel (LCD+buttons) parameter viewing, mode switching, manual control of circuit breakers, alarm confirmation

Remote Panel RP-3000XT (Ethernet) fully functional visual operation, supporting Full/Annunciator/Off modes

PC configuration ToolKit software (Windows 7/8.1/10) includes full parameter configuration, logic programming, analog processing, data trend monitoring, and log export

LogicsManager supports logical combinations such as AND/OR/NAND, and can customize discrete I/O associations and alarm triggering conditions

Analog Manager supports 8 types of sensor curves, 2 custom tables (9-point calibration), and unit conversion (° C → ° F, bar → psi) for analog processing

(3) Alarm and Log

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

Event log: records 300 system events (including timestamps), supports FIFO storage, and can be manually cleared

Alarm monitoring: covering 20+types of alarms such as voltage/frequency exceeding limits, phase rotation mismatch, I/O faults, communication abnormalities, etc

Key configuration parameters

(1) Permission and password grading

Permission level, access method, core permissions

CL0 (user level) no password, only view data, confirm alarms

CL1 (basic level) password 0001 modification of non critical parameters (such as language, unit)

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

CL5 (Super Debugging Level) Password 0500 Firmware Update, Advanced Parameter Configuration

Temporary permission algorithm generates password for temporary access to corresponding level, automatically exits upon timeout

(2) Example of Core Function Configuration Parameters

Parameter Category Key Parameters Default Value Configuration Range

Synchronous Control Voltage Difference Threshold (CBA) 5.00% 0.50-20.00%

Frequency difference threshold (CBA) ± 0.18Hz -0.49-0.49Hz

Phase difference threshold (CBA) ± 7.0 ° -60.0-60.0 °

Dead bus control detection threshold 10% 0-30%

Closing delay 5.0s 0.0-20.0s

Communication configuration CANopen baud rate 125kBaud 20-1000kBaud

Ethernet IP Mode Static/Dynamic (DHCP)

Load Transfer Time (CBA) ↔ CBB） 1.00s 0.50-99.99s

Key issue

Question 1: How is the dual circuit breaker (CBA/BBB) control function of LS-6XT implemented, and what are the core configuration differences?

Answer: The dual circuit breaker control is achieved through the “CBA/BBB mode”, and the core is the independent control and linkage logic of the two circuit breakers: ① Hardware configuration: CBA corresponds to the main circuit breaker, CBB corresponds to the backup/load circuit breaker, both support closing/opening pulse/continuous control, and can be configured with automatic unlocking (Pre open) function; ② Core differences: CBA focuses on main circuit grid connection, dead bus closure, and system A decoupling, while CBB focuses on backup circuit switching and system B associated control, with CBA having higher closure priority than CBB; ③ Linkage logic: supports load transfer (four modes), synchronous grid connection linkage (CBB synchronization after CBA closure), and selective disconnection in case of failure (such as CBA disconnection in case of system A failure and CBB disconnection in case of system B failure); ④ Configuration points: It is necessary to switch between “CBA”/”CBA/BBB” modes through parameter 9018 (Breaker mode), and configure the synchronization threshold, dead bus condition, and linkage delay of both modes separately.

Question 2: How to configure and use the extended I/O (IKD module) of LS-6XT, and what extension scenarios are supported?

Answer: The IKD module is an external I/O expansion solution, with the following core configurations and scenarios: ① Supported module types: IKD1 (8DI+8DO), IKD-IN-16 (16DI), IKD-OUT-16 (16DO), P1 model supports 2 IKDs (16DI+16DO), P2 model supports 4 IKDs (32DI+32DO); ② Connection method: Connected through CAN1 bus, CAN baud rate and module address need to be configured, shielded cable exposed length ≤ 25mm; ③ Configuration path: “Configure Input/Output → External Discrete Input/Output” in ToolKit, can set DI alarm level, delay time, and logical association of DO; ④ Extended scenarios: Suitable for complex systems that require more discrete signal acquisition (such as multi-sensor alarms) or output control (such as multi actuator linkage), such as multi loop state monitoring in ship power systems and multi device linkage control in industrial units.

Question 3: What is the core logic and safety mechanism of the synchronous grid connection and dead bus closure function of LS-6XT?

Answer: Both are the core functions of circuit breaker closure, and the logic and safety mechanism are as follows: ① Synchronous grid connection logic: Real time monitoring of dual system voltage/frequency/phase, meeting preset thresholds (voltage difference ≤ 20%, frequency difference ≤± 0.49Hz, phase difference ≤± 60 °) and continuously setting time (default 3s), triggering closure; Supports two synchronization modes: “slip frequency” and “phase matching”, which can offset transformer phase offset through phase compensation; ② Dead bus closure logic: detects that the system voltage is below the threshold (0-30% rated voltage) and has a continuous delay time (0-20s), triggering after meeting the “no other device closure request” (multi device negotiation), supporting three scenarios: A dead B dead, A dead B live, A live B dead; ③ Security mechanism: Verify phase sequence consistency (CW/CCW) before synchronous grid connection, and block closure if inconsistent; The closure of the dead bus requires the “Enable close” logic to be enabled through LogicsManager, and there should be no C/F level alarms; In multi device scenarios, using “device number priority” to avoid simultaneous closure and automatically releasing permissions after closure failure ensures system security.