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Lodestar PT3

Cable fault indicator Lodestar PT3 Technical specifications

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)	PtG, PtP
Minimum zero-sequence current for single-phase PtG registration, А	up 10
General description of devices
Visual fault indication	LED indication
Power supply
AC or DC supply voltage, V	120/220 or ~220
External backup power supply, V	-
Communication interface	RS-485
Communication protocol	Modbus
Operation monitoring	visual relay output RS-485 Modbus protocol (if there is main power supply)
Measurement accuracy
Current, %	5
Mounting
Mounting	switchboard mounting
External transducer
Сurrent sensor	Rogowski coil, (3 pcs.)
Operating temperature range, °С	from –40 to +70
IP rating of the indicator	IP 65

The fault indicator can operate in networks with insulated and resistance neutral. The cable fault detector is mounted in switchgear and control gear cell on the control board. The sensors of Lodestar PT3 fault indicator (based on the Rogowski coil) are mounted directly on cable phase conductors and transmit data to the indicator box.

Benefits:

Fault type recording and classification – short‑circuit and earth fault recording with fault type discrimination.
Faulted phase identification – indicates which phase is affected.
SCADA integration – transmits fault information via configurable relay outputs or RS‑485.
Visual fault indication – dedicated LEDs for clear fault notification.
Flexible power supply – 220 V DC, 110 V DC, or 220 V AC mains.
Standby LED power – backup supply for fault indication during power loss.
Battery monitoring – standby battery charge level indication.
Adjustable setpoints – configuration via DIP switches or client software.