SEL-T400L / SEL-T401L — ultra-high-speed traveling-wave line protection
SEL-T400L and SEL-T401L ultra-high-speed line protection that operates in the time domain on traveling-wave and incremental quantities. Tripping time starts at 1 ms and lies within the range of 1–5 ms.
- Tripping time
- 1–5 ms
- Principle
- traveling wave (TW87, TW32) and incremental quantities (TD21, TD32)
- Recording
- sampling rate 1 MHz
- Fault location
- to within one tower span
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The protection uses traveling-wave elements TW87 and TW32 and incremental elements TD21 and TD32. Events are recorded at 1 MHz, and fault location is accurate to within one tower span. The full-featured SEL-T401L includes main and backup protection in a 3U enclosure. Accurate fault location shortens crew patrol time.
Technical specifications
| Tripping time | 1–5 ms |
|---|---|
| Principle | traveling wave (TW87, TW32) and incremental quantities (TD21, TD32) |
| Recording | sampling rate 1 MHz |
| Fault location | to within one tower span |
Request a price and lead time
SEL-T400L / SEL-T401L — ultra-high-speed traveling-wave line protection. 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
What is the tripping time of the protection?
From 1 ms, within the range of 1 to 5 ms. The TW87, TW32, TD21 and TD32 elements operate.
How accurately is the fault located?
To within one tower span. Events are recorded at a sampling rate of 1 MHz.
How does the SEL-T401L differ from the SEL-T400L?
The SEL-T401L is a full-featured terminal with main and backup protection in a 3U enclosure.
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