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Sm@rtGear™ IE User Manual
10.6.2 Manual Mode
Manual operations via the breaker control switches disable all automatic operations. The transfer of sources is open (standard) or
closed transition and is enabled when the selector switch is in the manual mode position. After desired transfers are complete,
turn the selector switch back to auto mode to return to PLC-based automatic breaker control.
In the case of an autothrowover event, the associated breakers may only be opened or closed from the Breaker Controls screen in
Manual Mode.
10.6.2.1 Standard Open Transition
Operation Steps:
1) Turn selector switch to manual load. The blue manual mode light will illuminate.
2) Verify that the secondary source is available by noting whether the source availability light is illuminated. This may also be
determined using the HMI.
3) Upon verification use the breaker control switches to first open the primary source breaker and then close the tie breaker
(main-tie-main configuration) or secondary source breaker (main-generator configuration).
4) To retransfer to the primary source open the tie breaker (maintie-main configuration) or the secondary source breaker
(maingenerator configuration) and close the primary breaker.
10.6.2.2 Optional Closed Transition
Operation Steps:
1) Turn selector switch to manual load. The blue manual mode light will illuminate.
2) Verify that the secondary source is available by noting whether the source availability light is illuminated. This may also be
determined using the HMI.
3) Verify that the synchronization of sources light (green) is on.
4) Upon verification close the tie breaker (main-tie-main configuration) or the secondary source breaker (maingenerator
configuration). The two sources are now running in parallel. Prolonged paralleling of sources can create a hazardous
condition for the equipment and operator. It is recommended that paralleling be removed immediately after the transfer.
5) Open the primary source breaker to complete the transfer to the secondary power source.
10.7 Optional System Capabilities
10.7.1 Load Shedding and Load Prioritization
Load shedding consists of the required controls to prioritize downstream loads, supplying power to these loads based upon
source availability. This added functionality allows the user to pick and choose which downstream loads are critical to the specific
application. Load shedding requirements must be specified during the order process for the system to be constructed with the
required control scheme.
10.7.2 Peak Shaving
Peak shaving, in the main-generator configuration, is the process of switching power sources from the utility to the generator
during peak usage times, avoiding elevated utility costs. Peak shaving is most effective if the following conditions are met:
1) System is in the main-generator configuration and has closed transition capability.
2) Generator is adequately sized so as to provide power for all normal facility operations.
If these conditions are met the end user may increase power source flexibility, with the potential for significant utility cost savings.
10.8 Test Sequences
10.8.1 Main-Tie-Main or Main-Main Configuration
10.8.1.1 Standard Main-Tie-Main or Main-Main Configuration
Start Transfer Test – Source 1 – Open Transition
Press the Start Source 1 Test button on the control screen of HMI. The system will initiate an open transition transfer, the normal
main breaker 1 will open, and after timer TDOX (3 sec) expires the tie breaker will close.
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