Line-Rupter™ Switches
For outdoor transmission, 115 kV through 230 kV
Line-Rupter Switches are capable of closing, conducting, and interrupting load currents and parallel or loop currents up to 2000 amperes, as well as line- and cable-charging current
The S&C Line-Rupter Switch is a group-operated switch that uses three independent sealed-for-life interrupters with integral disconnects. It is exceptionally suited for unique mounting applications, including transmission line tower mounting, existing substation structure mounting, and inverted mounting.
Each pole-unit of a Line-Rupter Switch includes a brain which provides built-in positive sequence control . . . and a fully enclosed stored-energy source dedicated solely to operation of the interrupting unit which is in the circuit at all times. Close-and-trip mechanisms are fully enclosed and protected, too. There are no external linkages, lever arms, cams, shunts, etc. that must be coordinated with a disconnect blade to accomplish circuit interruption. Positively sequenced operation is assured regardless of severe weather conditions such as high winds, rain, sleet or snow.
Line-Rupter Switches are available in three-pole vertical-break style and are intended for upright or vertical mounting on a structure, or upright mounting on S&C Mounting Pedestals, or pedestals furnished by the user. Line-Rupter Switches include a manual operating mechanism with geared operating handle. Alternately, for remote supervisory control, power operation can be provided with an S&C Switch Operator - Type LS-2.
| kV | Amperes, RMS | ||||
|---|---|---|---|---|---|
| Nom. | Max | BIL | Cont. | Short Time – Momentary | Short Time – 3-Second |
| 115 | 123 | 550 | 1200 | 61 000 | 40 000 |
| 2000 | 61 000 | 40 000 | |||
| 138 | 145 | 650 | 1200 | 61 000 | 40 000 |
| 2000 | 61 000 | 40 000 | |||
| 161 | 169 | 750 | 1200 | 61 000 | 40 000 |
| 2000 | 61 000 | 40 000 | |||
| 230 | 242 | 900 | 1600 | 61 000 | 40 000 |
| 2000 | 61 000 | 40 000 | |||
Application Ratings
| Class | Qualifications | Maximum Amperes, Interrupting RMS Symmetrical | |
|---|---|---|---|
| Line Switching | Load Splitting (Parallel or Loop Switching) | Max 60-Hertz recovery voltage: 150 kV RMS | 1200/1600/2000♠ |
| Load Dropping | Circuits with all load-side transformers connected solidly grounded-wye on the primary (Line-Rupter switch) side and delta on the secondary side. | 1200/1600/2000♠ | |
| Circuits with load-side transformers connected other than as described above. | 1200/1600/2000♠ | ||
| Line Dropping | — | ♥ | |
| Cable Switching | Load Splitting (Parallel or Loop Switching) | Max 60-Hertz recovery voltage: 150 kV RMS | 1200/1600/2000♠ |
| Load Dropping | Circuits with all load-side transformers connected solidly grounded-wye on the primary (Line-Rupter switch) side and delta on the secondary side. | 1200/1600/2000♠ | |
| Circuits with load-side transformers connected other than as described above. | 1200/1600/2000♠ | ||
| Cable Dropping | Shielded cable | 550 | |
| Unshielded cable | 550 |
♠ Depends on continuous current rating on the Line-Rupter switch.
♥ Maximum length of line: 300 miles
Type LS-2 Switch Operator is a high-speed operator especially designed for Line-Rupter Switches. (Maximum operating time of 2.2 seconds.)
The operator features a sturdy welded enclosure with baffled louvers that allow air circulation, but keep out rain. The interior of the weatherproof, dustproof enclosure is accessed by a hinged door . . . rather than removal of the entire enclosure.
The Type LS-2 Switch Operator includes:
- Eight-pole adjustable auxiliary switch contacts, coupled to the motor
- External trip and close push buttons with padlockable cover
- Built-in manual operating handle for the disconnect
- Decoupling mechanism that allows decoupling and locking of the disconnect in the open position
- Mechanical position indicator
- Non-resettable operation counter.
Optional features for the Type LS-2 Switch Operator include:
- Additional auxiliary-switch contacts
- LED position indicating lamps
- Remote-control blocking switch
- Space-heater thermostat
- Duplex receptacle with ground-fault circuit interrupter, and convenience light lampholder with switch.
- Key interlocks
