Russelectric

2-, 3-, and 4-pole configuration
Front accessible wiring
Safe manual operator provides same quick-break, quick-make operation as motor operator
Simple electrical operator
Positive mechanical and electrical interlocking
Rapid arc quenching
Quick-break, quick-make, high-speed transfer mechanism

UL listed through 4000 amperes.
Operation is possible regardless of the position or condition of the automatic transfer switch.
Inherent break-before-make design provides positive assurance against accidental short circuiting of power sources.
Quick-break, quick-make contacts and the basic operating mechanisms of the bypass switch are identical to the transfer switch with full load-break capability and with the same electrical ratings.
True drawout construction allows safe and easy removal of the transfer switch without the need for maintenance personnel to make any electrical or mechanical disconnections.
The bypass/isolation switch is fully mechanical and is not dependent upon the operation of relays, interlock circuits, separate load-break contactors, or operator-dependent “dwell times” for safe operation.
Russelectric Model RTB and RTBD switches combine all of the functions of an automatic transfer switch plus a method for bypassing power from the live source to load in the event the transfer switch is disabled. They also allow the transfer switch to be isolated and deenergized for maintenance, testing, or repair. The automatic transfer switch is either Russelectric Model RMT or RMTD.

The Russelectric Model 2000 microprocessor-based control system is preprogrammed at the factory to control all of the operational functions of the automatic transfer switch, including standard accessories and optional accessories as specified by the purchaser.
The controller also senses the normal source and emergency source voltages, provides LED indicators to show whether the ATS is in the normal or emergency position, and also to confirm that the CPU is running.

The Model 2000 PLUS microprocessor-based control system provides all the functionality of the Model 2000 automatic transfer control plus the ability to monitor key power data. Designed as a performance upgrade of the Model 2000, it controls all the operational functions of the automatic transfer switch, including optional accessories.
The Model 2000 PLUS allows remote monitoring using industry standard open architecture communications protocol through a Modbus RTU communications network or through an ethernet network (with a converter). Data can be viewed using customer-provided software or Russelectric Windows®-based SCADA. With the web server communications option, the control provides internet-based remote monitoring and reporting capabilities.

On receiving a utility power failure signal, switchgear starts engine generator(s) and controls their synchronization and individual circuit breaker closure to parallel the generators onto the emergency bus. Additional controls allow transfer of loads to the emergency bus on a priority basis. Upon return of the preferred source, utility paralleling switchgear synchronizes and parallels the engine generators to the preferred source, and transfers the loads without power interruption. Generator test — transferring load from source to source without power interruption — is also available. Use of the closed transition operation minimizes load interruptions during test and retransfer.

Russelectric RTB-NB and RTBD-NB No Break Bypass/Isolation Switches combine all the functions of an Automatic Transfer Switch (ATS) plus a method for manually bypassing power from a dead source to a live source in the event the transfer switch is disabled.
They also allow the transfer switch to be isolated and deenergized for maintenance, testing, or repair without interrupting power to the load. The ATS is a standard open transition Russelectric Model RMT or RMTD. RTB-NB and RTBD-NB switches are identical in size and carry the same closing and withstanding ratings as Russelectric Standard RTB and RTBD Bypass/Isolation Switches.
Load Break
Pushing the solenoid interlock button and moving the bypass handle to the “Bypass” position closes the bypass contacts (BP), paralleling them with the ATS contacts (see figure). After the BP contacts are closed, mechanical interlocks immediately open the load break contacts (LB), disconnecting the load from the transfer switch while maintaining power to the load through the BP contacts. Coming out of bypass reverses this procedure, closing the LB contacts before opening the BP contacts, restoring power flow through the ATS without power interruption.