Lodestar PT1
Short-circuit current Indicator Lodestar PT1 Technical characteristics
| 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 |
| Minimum zero-sequence current for single-phase PtG registration, А | - |
| General description of devices | |
| Visual fault indication | mechanical blinker |
| Power supply | |
| AC or DC supply voltage, V | - |
| External backup power supply, V | - |
| Communication interface | - |
| Communication protocol | - |
| Operation monitoring |
|
| Measurement accuracy | |
| Current, % | 1,5 |
| Mounting | |
| Mounting | switchboard mounting |
| External transducer | |
| Сurrent sensor | current transformer for an insulated cable, 3 current sensors for each phase of the high-voltage cable |
| Operating temperature range, °С | from –40 to +70 |
| IP rating of the indicator | IP 20 |
The Lodestar PT1 comprises a recording unit and external measuring sensors. The recording unit is mounted in a switchgear cell or on a control panel. The included sensors are circular or square split‑core current transformers designed for installation on insulated cables.
Benefits:
- Any neutral grounding type – reliable operation in networks with solidly earthed or compensated neutral.
- Maintenance‑free operation – no servicing required; powered and triggeredfor directly by current sensors.
Two types of current sensors are available for the Lodestar PT1:
- Round current sensors (split-core) – can be installed on cables or bushings.
- Square current sensors (solid-core) – designed for mounting on bushings during switchgear manufacturing.
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