ER / CRD / MR / AR — short-circuit current indicators for overhead lines
LINAM fault passage indicators for overhead distribution networks, with a trip threshold of 50–1200 A and a 1 ms response time. Models with automatic reset on voltage or load current, and the portable MR for crews, shorten the time needed to find faults.
- Voltage
- 10.35–69 kV (ER), up to 38 kV (MR)
- Trip threshold
- 50–1200 A
- Short-circuit current
- 25 kA, 10 cycles
- Response time
- 1 ms
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The ER model is designed for 10.35–69 kV networks, and the MR for networks up to 38 kV. The indicators withstand 25 kA for 10 cycles. They are installed with a hot stick without de-energizing the line. After a fault current passes, the indicator signals, and the crew follows the chain of tripped indicators to the damaged section.
Technical specifications
| Voltage | 10.35–69 kV (ER), up to 38 kV (MR) |
|---|---|
| Trip threshold | 50–1200 A |
| Short-circuit current | 25 kA, 10 cycles |
| Response time | 1 ms |
| Installation | live, with a hot stick |
Request a price and lead time
ER / CRD / MR / AR — short-circuit current indicators for overhead lines. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 9030 33 70 00 |
|---|---|
| HS, 6 digits | 9030 33 |
| CN (EU) | 9030 33 70 |
| HTSUS (USA) | 9030 33 38 00 |
| China customs tariff | 9030 33 90 00 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
What network voltages are the indicators designed for?
The ER is designed for 10.35–69 kV, and the portable MR for networks up to 38 kV.
What are the trip threshold and response time?
The trip threshold is 50–1200 A and the response time is 1 ms. The indicator withstands a short-circuit current of 25 kA for 10 cycles.
How does the indicator reset after tripping?
Automatically, once voltage or load current is restored. It is installed with a hot stick while the line is energized.
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