Cutoto-Mounted Reclose

TripSaver II Cutout-Mounted Recloser enables utilities to improve  reliability for overhead lateral circuit protection at 15 kV and 25 kV by  combining the best aspects of fuse-saving and fuse-blowing.  TripSaver II reclosers keep the power on for more customers and avoid   costly truck rolls for utilities. This strategy adds an additional reclosing  device as close as possible to the source of the problem, so only customers  on the faulted lateral are affected. Power can be restored automatically   for temporary faults, avoiding sustained outages and reducing   momentary outages on feeders by "blinking" only customers   on the faulted lateral. Utilities will see immediate reduction   in the frequency of sustained outages on their system and   a dramatic improvement of reliability scores. 

Key Features of Cutout-Mounted Reclosers 

1. Automatically Distinguishes & Handles Temporary/Permanent Faults, Enabling "Self-Healing" 

• When faults (e.g., short circuits, overloads) occur in the line, it quickly interrupts fault current (response time in milliseconds) to prevent fault spread.

• For over 80% of temporary faults in power systems (e.g., lightning strikes, momentary tree contact, brief bird-caused short circuits), it automatically attempts ~3 reclosure cycles (configurable count). If the fault clears, power is restored without manual intervention.

• If the fault is permanent (e.g., line breakage, equipment damage), it automatically "locks out" (forming a visible circuit gap) after failed reclosures. This completely isolates the faulty section to avoid impacting the entire line, while helping maintenance personnel quickly locate the fault point. 

2. Directly Adapts to Existing Lines, No Additional Infrastructure for Installation

• No modification to existing lines is required. It can be directly installed on the fuse base of distribution lines (replacing traditional fuses), utilizing the original line’s installation space and wiring.

• Compact in size, with no complex wiring or independent cabinets. On-site installation only requires standard electrical tools and can be completed by 1-2 maintenance staff. It supports mainstream low-voltage distribution line voltage levels (e.g., 15kV/25kV). 

3. Significantly Improves Power Supply Reliability, Reducing Outage Impact

• Reduces unnecessary outage duration: Temporary faults are resolved automatically within seconds, eliminating the need to wait for manual repairs (e.g., avoiding prolonged blackouts across an area after a lightning strike).

• Lowers outage frequency: By isolating permanent faults, only the branch line with the fault is affected (not the entire main line), minimizing the outage scope.

• Industry data shows it can reduce the distribution line's  SAIDI (System Average Interruption Duration Index) by 80%  and  SAIFI (System Average Interruption Frequency Index) by 60% especially effective for fault-prone branch lines.

4. Safe Arc Extinction + Visual Fault Identification, Reducing Maintenance Risks 

• Adopts  vacuum interrupter technology: Arc extinction occurs internally during fault interruption, eliminating sparks and high-temperature debris (common with traditional fuses) to prevent fires or burns.

• After locking out due to permanent faults, it forms a  visible mechanical gap (e.g., the physical gap after contact disconnection). Maintenance personnel can judge the fault status visually without live testing, reducing electric shock risks.

5. Low-Cost Maintenance, Reducing Labor & Resource Consumption

• No frequent on-site replacements: Traditional fuses require staff to travel to the site for replacement after faults. This device handles temporary faults automatically, and only one on-site reset is needed for permanent faults—reducing over 90% of "unnecessary maintenance trips".

• No additional energy consumption: It does not require batteries or external power, relying on the line’s own electricity to power the internal microprocessor—lowering long-term operating costs (e.g., a device from a leading brand can recover its cost after just 4 avoided maintenance trips).

6. Supports Smart Grid Integration, Compatible with Remote Monitoring

• Equipped with remote communication interfaces (supporting mainstream protocols DNP3), it can upload real-time device status (e.g., "open/closed", "locked-out", "fault type") to monitoring platforms.

• Maintenance personnel can remotely configure parameters (e.g., reclosure count, interrupting current threshold, reclosure interval) via the backend—no on-site adjustments required. This is particularly suitable for maintaining lines in remote areas

Application Scenarios of Cutout-Mounted Reclosers

1. Medium and Low-Voltage Distribution Branch Lines

2. Rural and Remote Area Power Grids

3.  Urban Distribution Networks (Residential & Commercial Zones)

4. Temporary Power Supply Scenarios

5. New Energy Access Lines (Distributed PV/Wind)

6. Fault-Prone Line Segments

Technology parameters