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Lodestar FM-DFI

Technical characteristics of Lodestar FM-DFI

PARAMETER	VALUE
Mains voltage level, kV	6-36
Recorded fault types
Identification of two-phase and three-phase faults	+
Identification of single-phase PtG	+
Determination of singlephase PtG direction	+
Fault detection on line switch-on (single-phase PtG, PtP)	+
Minimum zero-sequence current for single-phase PtG registration), А	0.5
General description of devices
Visual fault indication	LED indication LCD indicator
Power supply
AC or DC supply voltage, V	100-240 or ~100-270
External backup power supply, V	-
Communication interface	RS-485 Ethernet
Communication protocol	Modbus IEC 608 70-5-104
Operation monitoring	visual relay output RS-485 Ethernet
Measurement accuracy
Current, %	3
Voltage, %	1 when using a voltage transformer (VT) 3 when using capacitive dividers
Active, reactive and apparent power,%	3
Frequency, %	1
Mounting
Mounting	switchboard mounting / wall-mounting
External transducer
Сurrent sensor	Rogowski coil 3 to 30 in multiples of 3
Voltage transformer (VT)	standard voltage transformer capacitive divider
Operating temperature range, °С	from –40 to +70
IP rating of the feeder monitor	IP 60

Lodestar FM-DFI is a universal device for registration and analysis of emergency processes that combines the functions of selective detection of line damage in networks of any topology and type of neutral and measurement of basic parameters of electricity. The Device is designed to detect the fact and determine the direction of phase-tophase short-circuits, phase-to-ground fault in overhead and cable power distribution lines of 6-36 kV. Lodestar FM-DFI monitors the minimum voltage and extra voltage with indication of alarm signals.

Benefits:

Directional fault detection – detects and identifies the direction of occurred earth faults.
Flexible power supply – auxiliary power, line supply, or constant voltage.
High measurement accuracy – precise fault detection and monitoring.
Flexible SCADA integration – supports IEC 60870‑5‑104 over Ethernet; Modbus over RS‑485.
Large event memory – stores more than 200 fault events for post‑fault analysis.

Comprehensive Monitoring Solutions

ATRIY's feeder monitors integrate seamlessly into existing SCADA systems, enhancing visibility and responsiveness across the grid. These robust monitoring solutions deliver continuous measurements of crucial electrical parameters such as current, voltage, frequency, and load status. As a result, network operators gain increased situational awareness, enabling proactive management and rapid response to potential faults.

Key advantages include:

Accurate and immediate detection of fault locations

Precise control of network parameters

Integration in advanced SCADA systems

Real-time monitoring for proactive decision-making

Key Features and Applications

ATRIY’s feeder monitors are particularly effective for high voltage applications, ensuring reliable operation and safety in challenging environments. Each device includes a highly sensitive sensor and an intuitive indicator system, offering clear visibility of the system status. This technology is essential for enhancing the performance and reliability of electrical distribution networks.

Main features:

Suitable for overhead and underground lines

Robust and reliable operation under extreme environmental conditions

High accuracy measurement of each phase parameters

User-friendly interfaces and simple integration

Benefits of ATRIY’s Feeder Monitors

Choosing ATRIY’s feeder monitors brings numerous operational benefits:

High reliability and reduced downtime due to early fault detection

Optimized network control reducing operational and maintenance costs

Enhanced grid stability through precise parameters monitoring

Improved decision-making capabilities with comprehensive real-time data

ATRIY’s monitoring device helps utilities significantly reduce operational risks and improve efficiency, ensuring stable and secure power distribution across the grid.

Invest in advanced feeder monitoring system today and experience superior network reliability and operational excellence.