Woodward LS 4 Circut Breaker Control 8440-1510
The Woodward LS 4 (8440-1510) is a microprocessor-based circuit breaker controller for medium/low-voltage switchgear, integrating synchronization check, breaker protection, and load control in a compact panel-mount design. It features true RMS voltage/current sensing, a backlit LCD, and CAN bus communication, enabling precise, reliable control of utility/genset intertie breakers.
Primary Applications
- Breaker Synchronization: Synch-check for closing between utility (A) and genset (B) sources; dead-bus start support.
- Protection & Control: Overcurrent/undervoltage protection, load sharing, and tie-breaker control between two gensets.
- Power Management: Islanding, grid paralleling, and load shed/restore for generator sets in industrial, commercial, and data center applications.
- System Monitoring: Real-time display of voltage, current, frequency, and breaker status; fault logging via LCD.
Technical Specifications
| Specification | Details |
|---|---|
| Model | 8440-1510 (LS 4 Series) |
| Voltage Sensing (A/B) | True RMS, 50/60 Hz (40–70 Hz); 230/400 Vac rated |
| Current Sensing (A) | True RMS; 5 A CT input (3× overload linear range) |
| Display | 4-line backlit LCD; LED status indicators |
| Keypad | 6-key tactile membrane (configuration/operation) |
| Communication | CAN bus (125 kBaud); RS-232 (19.2 kBaud) for PC config |
| Discrete I/O | 8 isolated inputs (18–250 Vac/dc); 6 relay outputs (2 A @250 Vac) |
| Power Supply | 18–32 Vdc; max. 12 W consumption |
| Dimensions | 219 × 171 × 61 mm (panel cutout: 186 × 138 mm) |
| Weight | ~850 g (2.5 lbs) |
Environmental Specifications
| Parameter | Rating |
|---|---|
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
| Humidity | 5%–95% RH (non-condensing; ≤40°C: 85% max) |
| Vibration | IEC 60068-2-6 (5–150 Hz, 0.1 mm displacement) |
| Enclosure | Industrial plastic; panel-mount (IP54 front, IP20 terminals) |
Recommended LS 4 Series Products
- 8440-1006 (LS445B) – 400 Vac /5 A controller; high-current version for heavy industrial switchgear.
- 8440-1030 (LS441B) – 400 Vac /1 A model; optimized for low-current genset applications.
- 8440-1031 – 100 Vac /5 A controller; designed for 120 Vac utility/genset intertie systems.
- 8440-1032 (LS411B) – 100 Vac /1 A unit; compact solution for small generator sets and backup power systems.
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