Senses the interruption of the Source 1 pow- er. Retransfers the load to Source 1. In this position, the controller, linear actuator, and contact mechanisms can be tested. The cranking handle will operate only when power is available, and when the bypass switch is connected to one of the sources. The load transfers to the generator set when genset power becomes available accept- able. The value can be set using the InPower service tool or the digital dis- play. Contact Assembly Removal and Replacement 1200 Amperes 6-17.
Or, send a fax to Cummins Power Generation us- ing the fax number 1-763-574-8087. Power Modules are available in three different voltage ranges. When closed to either the Normal or the Emergency pow- er source, the contacts are mechanically held. This delay begins when the Source 2 typically the generator voltage and fre- quency reaches the settings of the control. These values are set with the InPower service tool or the digital display. A Closed Transition Transfer Mode executes a load transfer by momentarily paralleling both sources a maximum of 100ms before switching sources. Read the manual carefully and know when these conditions exist.
Water-cooled generator sets use a two-wire start control. Software Versions Prior to Version 1. Starting with Software Version 1. The Power Module contains eight transformers. See the Digital Display Menu System section for details on setting the clock. The transfer switch, the emergency bus, and the load bus are energized by the output of the generator set and present a serious shock hazard whenever the bypass switch is in the Emergency position. The Source 1 or Source 2 Available relays are en- ergized when their respective power sources are available and within the acceptable limits of the voltage sensors.
The Motor Disconnect switch S1 interrupts signals and disables the linear actuator. When testing with a load, the generator set will warm-up prior to a transfer. After the delay, the transfer switch can retransfer the load to Source 1. Electrical characteristics and application informa- tion are shown on the lower portion of the name- plate. If Source 1 is interrupted, the load is transferred to Source 2 Emergency. The time delay begins when a transfer or retransfer signal signal has been sent to the relays.
Use normal and necessary safety precautions be- fore starting any service procedure. Removing and Replacing an Auxiliary Switch Assembly. Source 1 and 2 voltages are sensed by transform- ers T1 and T2. When a sensor detects a high voltage condition over a specified time period delay , it initiates a transfer. The val- ue is set with the InPower service tool or the digital display.
This con- tact is used by the load shed circuit and is not avail- able for customer use. Not all but- tons are active for each menu. The control senses the all the load currents including the neutral current , three load voltages, and three power factor angles. Bypassing the Transfer Switch 3-2. Replacing the Contact Assembly 7-12. Then take the necessary steps to protect personnel and the equipment.
One transformer is connected to Source 1 and the other to Source 2 Figure 2-11. The 2-ampere battery charger has an ammeter to indicate charging current and a fuse to protect the battery charger circuit. Jewelry is a good conductor of electricity and should be removed when working on the electrical equipment. In the Isolate position, both the primary and the secondary isolation contacts are open. Generator Set Start Test 3-6. Reinstall the lithium battery af- ter performing service parts replacement. Removing the Contact Assembly 7-6.
Contact Assembly Removal and Replacement 1200 Amperes 7-1. Digital Module The Digital Module Figure 2-10 contains the logic and timing circuits that control transfer switch op- eration. Due to the serious shock hazard from high voltages within the cabinet, all service and adjustments to the trans- fer switch must be performed only by an electrician or authorized service representative. The proper adjustment is a function of the load. The pick-up range for a rising voltage is 85 to 100% of the nominal voltage set- point.
Sends a start signal to the generator set Source 2. A set of secondary isolation contacts con- nects the automatic transfer switch controls to the available power source see Figures 2-5 and 2-6. The adjustable range for the time delay period is 0. PowerCommand Network Interface Module 2-17. See Testing With or Without Load on page 2-10. The Normal side Source 1 auxiliary contact switch is actuated when the transfer switch is in the Normal position.
Motor Disconnect Switch The Motor Disconnect toggle switch, on the acces- sory control plate, enables and disables the linear actuator Figure 2-8. An open switch stops the generator. Software Versions Prior to Version 1. Replacing the Contact Assembly 7-6. The default value is 1%. Movable Contact Assembly Removal and Replacement 3000 Amperes 6-25. Senses the interruption of the Source 1 pow- er.