Square D RMS510 DS 840 LSIG Digitrip

The Square D RMS510 DS 840 LSIG Digitrip is a high‑performance electronic trip unit designed for integration with medium‑ and low‑voltage circuit breakers to provide highly reliable protective functions and enhanced power system control. Engineered by Schneider Electric / Square D, this trip unit combines advanced digital protection technology with flexible configuration options to deliver precise fault detection, real‑time diagnostics, and robust coordination in demanding electrical distribution environments.

Core Protection Capabilities:
The RMS510 LSIG Digitrip trip unit provides comprehensive protection against electrical faults by incorporating:

L — Long‑time (Overload) Protection: Detects sustained overload conditions to prevent overheating and equipment damage.
S — Short‑time Protection: Improves selectivity by introducing a time‑delayed trip for short‑duration fault currents.
I — Instantaneous Protection: Responds rapidly to high‑magnitude short‑circuit currents for immediate isolation.
G — Ground‑Fault Protection: Detects imbalance due to ground faults to protect personnel and equipment.

This combination (LSIG) ensures coordinated, selective protection across distribution systems where reliability and continuity are critical.

Advanced Digital Features:
The Digitrip RMS510 platform elevates protection performance with digital precision and adaptability:

Adjustable Settings: Users can tailor pickup values, time delays, and curve shapes to match system needs and coordination studies.
True RMS Sensing: Provides accurate current measurement for all waveform conditions, improving protection reliability in non‑linear and distorted load environments.
Event Logging and Diagnostics: Captures fault events, trip history, and performance data to support troubleshooting, maintenance planning, and system optimization.
Communication Ready: When paired with optional communication modules (Modbus, Ethernet, etc.), it supports integration with energy management systems and building automation for real‑time monitoring and remote configuration.

Versatile Integration:
The Square D RMS510 DS 840 Digitrip unit is compatible with a broad range of Square D air circuit breakers (such as DSL, DSII, RMS frames) and can be field‑installed or used from the factory. Its modular design supports accessories like:

Auxiliary contact blocks
Shunt trips and undervoltage releases
Metering modules
Communication interfaces

Applications:
The RMS510 DS 840 LSIG Digitrip is widely used in:

Industrial plants and manufacturing facilities
Commercial buildings and campuses
Data centers and mission‑critical power systems
Utilities and infrastructure installations
Generator and motor feeder protection

Reliability and Compliance:
Built on proven Digitrip technology, the Square D RMS510 DS 840 LSIG complies with major industry standards for electrical protection, including ANSI/IEEE and IEC guidelines. Its rugged construction and dependable performance ensure long service life and consistent fault response in harsh electrical environments.

Square D RMS510 DS 840 LSIG Digitrip EO DO Air Circuit Breaker, RMS510 DS Digitrip trip unit, Electrical operator (EO), Manual operator (DO), Line and load terminal connectors, Arc chutes and interrupters, Control wiring harness, Racking mechanism or mounting cradle (if applicable), Test or calibration certificate (if included), User manual and installation guide, Safety and compliance documentation, Manufacturer warranty card, Original Square D packaging