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Charlotte Stonestreet
Managing Editor |
GIC SM800 SERIES PHASE FAILURE RELAYS
14 May 2025
GIC SM800 SERIES PHASE FAILURE RELAYS

GIC SM800 SERIES PHASE FAILURE RELAYS
Reliable Protection for Three-Phase Systems
The GIC SM800 Series Phase Failure Relays — including models DMS110, DMS120, and DMA220 — are designed to monitor critical parameters in three-phase electrical systems and provide fast, accurate protection against phase-related faults. Compact, DIN-rail mountable, and engineered for industrial-grade performance, these relays help safeguard motors, compressors, and control equipment from damage caused by voltage anomalies.
FEATURES
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Phase Sequence and Failure Detection Instantly detects missing phases, incorrect phase sequence, and phase asymmetry to prevent equipment malfunction or burnout.
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Voltage Monitoring Range Supports a wide input range (up to 500V AC depending on model) for compatibility with a variety of applications.
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Asymmetry and Over/Undervoltage Protection Configurable trip points for voltage imbalance and abnormal conditions ensure equipment operates within safe limits.
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DIN Rail Mounting Compact enclosure suitable for standard industrial panel installations.
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Visual Status Indicators LED indicators provide real-time fault and operational status at a glance.
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Output Relay Contacts Provides fail-safe output relay for alarm signaling or shutdown control when a fault is detected.
MODEL HIGHLIGHTS
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DMS110 – Monitors phase sequence and failure in 3-phase, 3-wire systems (without neutral).
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DMS120 – Adds asymmetry monitoring and adjustable trip settings for enhanced protection.
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DMA220 – Suitable for 3-phase, 4-wire systems with undervoltage/overvoltage thresholds and restart delay configuration.
WHY CHOOSE GIC PHASE FAILURE RELAYS?
GIC’s SM800 Series relays provide reliable, maintenance-free protection in environments where power quality is critical. Trusted by panel builders and OEMs, these relays are an essential component in any motor control, pump protection, or generator panel.
APPLICATIONS
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Motor and pump control panels
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HVAC and compressor protection
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Industrial automation and process equipment
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Genset and ATS panels
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Building management systems (BMS)
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Utilities and infrastructure systems
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