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TripSaver® Cutout-Mounted Recloser

TripSaver® II Cutout-Mounted Recloser

S&C’s TripSaver II Cutout-Mounted Recloser is the second generation of S&C TripSaver Dropout Recloser. It is a single-phase recloser, offered in system class voltage ratings of 15-kV and 25-kV. Being ideally suited for lateral circuits that frequently experience momentary fault interruptions, this Smart Grid solution eliminates the permanent outages which can result when lateral fuses operate in response to these temporary faults. It also eliminates the momentary interruptions on feeders in instances where the substation breaker is tripped to save the lateral fuse during a temporary fault.

TripSaver II is a self-powered, electronically controlled single-phase recloser using vacuum fault interrupter technology. It is available for installation in new or existing current-production (“-R10” or “-R11”) S&C or MacLean Power Systems Type XS Fuse Cutout Mountings. A two-insulator, branch-feeder style mounting is also available. TripSaver II requires no programming or batteries for back-up power.

Chicago Innovative Award Winner


The cost-effective way to improve reliability on lateral circuits

  • LCD screens displays real-time device status – information scrolling activated by cycling mode-selector lever; Six languages supported
  • Cuts sustained service interruptions from temporary faults – improves SAIFI and SAIDI performance, saves time and money
  • Cuts number of momentary interruptions at the feeder – improves MAIFI performance
  • Supports up to three reclosing operations before it drops open – provides visible open gap
  • Low minimum pickup current at 5A
  • A wide variety of time-current characteristic (TCC) curves are available – provides excellent coordination with other devices
  • Self-powered, factory-programmed microprocessor control – installation is quick and easy; no batteries needed
  • Retrofittable in existing “-R10” or “-R11” S&C or MacLean Type XS Fuse Cutout mountings, Loadbuster® Tool operable
  • Inrush restrain feature always on – device will not nuisance trip on inrush when closed into the mounting
  • Overload interruption capability – device will drop open on overload condition
  • Ice-breaking capability – device is able to break ¾″ (20mm) of ice
  • Sectionalizing option for 4-kA rated models – allow a 4-kA device to operate as a sectionalizer for faults between 4-kA and 6.5-kA

TripSaver II supports up to three reclosing operations (four tripping operations in total) before it drops open, with a 5-second open time interval. The interrupter resets two seconds after drop-open, ready for the next operation. TripSaver II reverts to its first TCC curve after 15 seconds have elapsed since the last reclosing operation.


kV Amperes, RMS
System Class Nom. Max BIL Continuous Interrupting, Sym
15 15 15.5 110 100 4 000
6 300
25 25 29 125 100 4 000
6 300
150 100 4 000
6 300

 Minimum trip current is 5 amperes.
 These models can be applied to protect single-phase-to-neutral circuits only in solidly-grounded-to-neutral (multi-grounded-to-neutral) 34.5-kV systems where leakage distance to ground meets user’s requirement. These models use 25-kV 150-kV BIL mounting.


As shown in the following table, TripSaver II offers a number of advantages over traditional lateral protection devices.

Comparison of Lateral Protective Devices
Feature/Benefit Single-Phase
Hydraulic Recloser
Electronic Sectionalizer
TripSaver II
Easy to install   Yes Yes
Low initial price   Yes Yes
Low installation cost   Yes Yes
Fault-interrupting capability Yes   Yes
Easy to reset Yes   Yes
Electronic control   Yes Yes
No bypass switch required   Yes Yes
Light weight compared to oil reclosers   Yes Yes
No battery backup required   Yes Yes
Fits in cutout mounting   Yes Yes
No momentary outage on the main feeder for lateral faults Yes   Yes



990111 or 990211
Rated: 15 kV, 110 kV BIL, 4 kA or 6.3 kA


990122 or 990222
Rated 25 kV, 125 kV BIL, 4 kA or 6.3 kA


990132 or 990232
Rated 25 kV, 150 kV BIL, 4 kA or 6.3 kA


993131-E or 993231-E
Rated 15 kV, 150 kV BIL, 4 kA or 6.3 kA



User Interface

LCD Screen and Mode Selector

Springs help guide the mode selector lever to the desired position; alignment of colored labels provides visual guidance.

Mode Selector in Auto Mode Position

screen and mode selector

Mode Selector in Non-Reclose Position

screen and mode selector

LCD “Normal” Screen Mode Provides Four Pieces of Information

Status information

LCD “Display” Screen Mode Scrolls Through Six Additional Pieces of Information

additional status