Most Versatile and Capable Horizontal Interrupter Line Switchers Available (LSH, LSH-B)
Southern States LSH and LSH-B horizontal interrupter line switchers provide load breaking, loop splitting, and line dropping capabilities for your most critical line switching applications. Additional applications include transformer magnetizing current interrupting and cable switching. All circuit making and breaking operations are accomplished in SF6, eliminating open air arcs. The horizontal interrupter line switcher is available with (Model LSH-B) or without (Model LSH) an integral vertical break switch. Both models can be supplied with either a manual operator or motor operator.
The LSH and the LSH-B are also well suited for such special purpose applications as series reactor or capacitor bank bypass switching.
The design of the LSH and LSH-B is extremely versatile and can be mounted in most any orientation including horizontal upright, vertical, and underhung (LSH only) positions. It can also be designed to mount on a Southern States supplied support structure or for mounting on a customer supplied or existing structure.
- Circuit makes and breaks inside the interrupter – No open air arcs
- Reduced maintenance and longer life for increased line switching duty
- Available with and without vertical break disconnect
- Visual dielectric indication
- Fault close rating of 40 kA
- Single gap interrupters provide full BIL without the need for an integral disconnect switch or voltage grading resistors/capacitors
- Simple, easy erection minimizes field installation time required — all kV ratings ship with the insulators factory assembled and adjusted as standard
- Adaptable to a wide variety of mounting positions, structure heights, and phase spacings
Design Characteristics
| Maximum Voltage | 38kV | 48.3kV | 72.5kV | 123kV | 145kV | 170kV | 245kV |
| Interrupter/ BIL (kV) | 550 | 750 | 900 | ||||
| CSH-B Disconnect BIL (kV) | 200 | 250 | 350 | 550 | 650 | 750 | |
| Continuous Current | 1200 A & 1600 A | ||||||
| Load Current Interrupting | 1200 A & 1600 A | ||||||
| Loop Current Interrupting | 1200 A & 1600 A | ||||||
| Line Charging Current Interrupting | 600 A for allkV ratings | ||||||
| Fault Close Ratings | 10 time 40 kA, 15 time 31.5 kA, 30 time 20 kA | ||||||
| Ambient Temperature Range | -40°C to +50°C standard for 38kV through 170kV -30°C to +50°C standard for 245kV -40°C to +50°C optional for 245kV -50°C to +50°C optional for allkV ratings |
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Catalog Flyers & Bulletins
LSH LSH-B 38kV-245kV Catalog Flyer
CM-4AE Motor Operator Catalog Flyer
General Information
Finepoint Circuit Breaker Test & Maintenance Conference 2008 – Local, Series- Connected Interrupters Enhance System Reliability
Control Wire Sizing Recommendations for CSH & CSH-b
Feature on LSH and LSH-B installation
A Circuit Switcher In Record Time
Standard & Available Optional Features for CM-4AE Motor Operator
Specification Guides & Drawings
LSH & LSH-B Product Specification Guide(Download Word Document)
