DLF / DLX line differential protection terminal
DLF and DLX provide longitudinal differential protection of overhead and cable lines with up to 3 ends, including lines with a transformer in the protected zone. DLF has backup distance protection, and DLX is a compact version for switchgear cells.
- Line ends
- up to 3, including a transformer in the protected zone
- Backup protection
- distance (DLF)
- Functions
- capacitive current compensation, external fault detector, fault location using data from both ends
- Communication channel
- single-mode optical fibre (DLX)
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Both terminals suit lines of any voltage class, overhead and underground. The protection compares the currents at the line ends and compensates the capacitive current, which matters for long cables. An external fault detector keeps the protection stable during through-fault currents, and fault location uses data from both ends. Tripping is single-phase or three-phase. DLX exchanges data over single-mode optical fibre and is built into switchgear cells.
Technical specifications
| Line ends | up to 3, including a transformer in the protected zone |
|---|---|
| Backup protection | distance (DLF) |
| Functions | capacitive current compensation, external fault detector, fault location using data from both ends |
| Communication channel | single-mode optical fibre (DLX) |
| Tripping | single-phase / three-phase |
Request a price and lead time
DLF / DLX line differential protection terminal. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8536 49 00 90 |
|---|---|
| HS, 6 digits | 8536 49 |
| CN (EU) | 8536 49 00 |
| HTSUS (USA) | 8536 49 00 80 |
| China customs tariff | 8536 49 00 90 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
How many line ends do DLF / DLX protect?
Up to 3 ends, including a line with a transformer in the protected zone.
How does DLX differ from DLF?
DLX is a compact version for switchgear cells and works over single-mode optical fibre. DLF has backup distance protection.
Is the protection suitable for cable lines?
Yes, the terminals work on overhead and cable lines and compensate the capacitive current.
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