Description
DEESYS DGF-D11F Digital Ground Fault Relay
Precision Low-Voltage GFR & Insulation Monitoring for Marine & Industrial Systems
This high-reliability DEESYS digital ground fault relay is in excellent used condition. It has been carefully inspected, dust-cleaned, and fully bench-tested. All tactile control buttons (M, Up/Down, SET, TEST, RESET) respond cleanly, and the digital LCD display is sharp, clear, and without faded segments. The rear terminal block connections are robust, clean, and ready for installation.
Product Overview
The DEESYS DGF-D11F is an advanced digital ground fault relay (GFR) specifically designed to deliver critical insulation monitoring and active leakage current protection in low-voltage electrical networks. It is a vital safety standard on marine electrical switchboards, cargo ships, vessels, and industrial main distribution boards.
Operating alongside a Zero-Phase Current Transformer (ZCT), the DGF-D11F samples electrical phases to detect minuscule leakage paths down to milliampere resolution. By tracking degradation in wiring systems early, it generates immediate trip or alarm sequences before minor faults cascade into dangerous phase-to-ground short circuits, arc flashes, or shipboard fires.
Technical Specifications
| Specification Parameter | Details |
|---|---|
| Brand / Manufacturer | DEESYS (South Korea) |
| Model Designation | DGF-D11F |
| Device Function | Digital Ground Fault Protection Relay (GFR) |
| System Compatibility | Low-Voltage AC Distribution Circuits (Marine / Land Industrial) |
| Fault Detection Mode | Leakage current monitoring via external ZCT input |
| User Interface | Digital LCD segment screen with menu navigation buttons |
| Installation Profile | Standard panel flush-mount design |
Key Features
- High-Accuracy Digital Diagnostics: Constantly evaluates live insulation health, showing clear numerical leakage currents for easy marine survey checks and preventive diagnostics.
- Adjustable Delay Settings: Program current limits and custom time-delay actions seamlessly to prevent nuisance tripping caused by transient startup loads or inrush currents.
- Integrated System Testing: Dedicated front-panel “TEST” and “RESET” keys make routine functional checks and fault simulation effortless.
- Marine-Grade Reliability: Hardened structural housing resists high mechanical vibration and salty, humid atmospheres typical of maritime control rooms.

