|
 Home
 About Us
Products
Applications
Installation Instructions
Events
Sales Offices
News and Job Openings
|
E.O. Schweitzer Manufacturing
A Division of SEL
 Fault Indicators
Voltage Indicators
Other Products for the Industry
Tel.: 1-847-362-8304
Fax: 1-847-362-8396
Email: csr@eosmfg.com
|
|
1TPRI
Single-Phase Test Point Mounted Integral Display
| Overview |
Use SEL test point voltage reset fault indicators (1TPRI) on 200 and 600 A class underground distribution systems whose terminators have test points. The 1TPRI requires a 5 kV phase-to-ground minimum voltage to reset and remain ready to trip. Its target, built into the sensor housing itself, automatically resets when system voltage returns to normal. The conductive, easy-to-install EPDM rubber housing maintains the separable connector system's ground shielding. The 1TPRI operates independently of load current.
The 1TPRI's inrush restraint feature blocks tripping that might result from reclosing operations. When the breaker or recloser opens, the 1TPRI senses a loss of voltage on the test point. The 1TPRI blocks the display from targeting if the subsequent inrush current exceeds the trip value. It is ready to trip a few minutes after reenergization.
|
| Applications |
Install 1TPRI fault indicators in padmount transformers, subsurface load centers, or junction sectionalizing points. In single-phase underground loop applications, install the 1TPRI at the transformer. At sectionalizing junctions, place an indicator on each outgoing feed. The indicator installs just below the elbow pulling eyes, an ideal location for a lineman to view the target and sectionalize the faulted cable.
The 1TPRI fault indicator is also available with a remote display that allows its user to determine its trip status without having to open multiple enclosures. SEL also offers the 1TPRI with an auxiliary contact feature. This model has the same compact, easy-to-use and apply package as the standard unit, but allows the utility to connect the fault indicator to a SCADA system. The latching contact closes when a fault occurs and remains closed until normal system voltage is restored for three to five minutes.
|
| Installation |
Use 1TPRI fault indicators at single-phase and padmount transformers, subsurface load centers, or junction sectionalizing points. To install the 1TPRI, simply remove the test point’s protective cap and replace it with the indicator. The 1TPRI comes with an adapter that allows the lineman to quickly modify the fault indicator to fit the major manufacturers’ various test point designs. Because of its mounting position on the terminator, concentric neutral training is not a consideration. The cable entrance portion of 600 Amp T-body connectors with test points is another ideal location for E-1TPRI fault indicators. At junction sectionalizing points, the Junction Shield prevents false tripping that might otherwise occur because of adjacent phases.
Removing the 1TPRI to access the test point for system testing is as simple a process as removing the 1TPRI, performing the test, and re-installing the indicator.
1TPRI fault indicators come with an internal adapter ring that accommodates most manufacturers’ elbow test points.
|
| Specifications |
| Power Source |
Test point elbow terminator voltage |
| Nominal Trip Ratings |
400 & 800 A |
| Trip Tolerance |
+/- 10% |
| Voltage Range (P-G) |
5 kV to 38 kV |
| Minimum System Voltage |
5 kV P-G |
| Reset |
Automatic at minimum voltage |
| Maximum System Voltage |
Underground cable rating |
| Typical Reset Time (depending on system voltage) |
3 to 10 minutes |
| Maximum Fault Current |
25 kA for 10 cycles at 60 Hz |
| Temperature Range |
-40° to +85°C |
| Trip Response Time |
1 ms |
| Inrush Restraint Response Time |
300 ms (add “IR” option) |
| Elbow Style |
200 A class with test point |
| Housing Material |
Conductive EPDM rubber |
| Display [1.2 cmI target area] |
Reflective Red Target |
| Submersibility |
15 feet |
| Weight |
100 grams (typical) |
|
|
|
