Overview: The document discusses the field retrofit capabilities of S&C Type PM Switch Operators for manual PMH, PMS, and PME Pad-Mounted Gear. These operators enable remote supervisory control of Mini-Rupter Switches, facilitating the automation of distribution systems.

Specifications: The Type PM Switch Operators are designed for field installation on existing manual models. They provide remote control capabilities and are available with factory-installed options for new configurations. The operators are equipped with a low-voltage compartment for user-supplied communications equipment and an interconnecting-control-wiring base spacer for necessary wiring.

Procedures: The retrofit process involves installing Type PM Switch Operators and connecting them to the Mini-Rupter Switches. The operators are powered by battery packs and an S&C Battery Charger, which also provides control power. The installation includes a low-voltage compartment for additional equipment and requires user-furnished conduit and wiring unless a base spacer is used.

Features: The system supports fault detection, circuit reconfiguration, and load transfer. The Model PMH-9 includes optional components like S&C Voltage Sensors and current sensors for enhanced monitoring. The battery charger features an alarm circuit for status indication and protection against deep discharge.

Benefits: The ability to retrofit existing gear minimizes costs and supports the economic justification of automated systems. The self-contained package allows for comprehensive remote supervisory control, making power operation feasible for underground systems.