Alarm control switch (ACS) - This is the "HORN ACK" AND "LAMP TEST" switch.
Alarm module - This module annunciates the warnings of the fault or alarm conditions.
Automatic loading control - This control is a feature of the control system. These functions of the genset are performed by the automatic loading control: soft loading, base load control and soft unloading. These functions are controlled by setpoints that are defined by the operator.
Automatic paralleling - Paralleling to the utility or paralleling to another generator is performed automatically according to user setpoints.
Auxiliary ""a"" contact - This is the secondary contact of a switching device. This contact is open when the device is open. This contact is closed when the device is closed.
Auxiliary ""b"" contact - This is the secondary contact of a switching device. This contact is closed when the device is open. This contact is open when the device is closed.
Base load operation - The base load operation is a mode of operation of the genset. The genset starts. The genset attains rated speed and the rated voltage. The genset will become synchronized with the bus. The genset will be paralleled with the utility. The genset will produce power until the genset receives a signal to shutdown.
Base load setpoint - The base load setpoint is a predetermined level of output. The base load setpoint works with the base load operation.
Base load stability - The base load stability is the ability of the genset to maintain a power output that has been predetermined.
Block loading - The block loading capability is the connection of an existing load. This is an abrupt operation. This operation is done without a gradual increase of the load.
Brake Relay Timer - The brake relay timer (BRT) begins counting down after the engine control switch (ECS) is turned to "OFF/RESET". The radiator fan is allowed to stop before the brake for the tarpaulin cover is released.
Breaker status lights - The breaker status lights are LED lights. These lights are located above the switch for "BREAKER CONTROL". These LED lights indicate whether the breaker is open or closed.
Bus - The bus consists of the conductors of a power system. The generator bus refers to all of the power leads that run from the generator to the generator circuit breaker.
Controller gain - The controller gain is an adjustable parameter for the base load operation. This parameter affects the response time of the controller when the load changes.
Control power - The control power circuit is 120 ACV or 24 DCV. This power is provided by the customer. The 24 DCV is usually provided by the batteries that are located in the power module.
Cool down condition - The cool down condition is a interruption of power generation that is not the result of a fault. The generator circuit breaker is opened and the engine is running at no load.
CT ratio - The CT ratio is the ratio of turns of the primary winding to the number of turns in the secondary winding of the current transformer (CT).
Customer interconnects - The customer interconnects are terminals that are located in the switchgear. These contacts are used for the inputs that are customer supplied and the outputs that are customer supplied.
Dead bus closing - This is a mode of operation. The bus is not connected to any other power source.
Distribution power - Distribution power is 120 ACV or 24 DCV that is distributed to components of the power module. These components include the following items: fans, lights and heaters.
Drawout relay - A drawout relay is a relay that can be removed from the switchgear without removing the wiring connections or wiring terminals.
Engine control switch (ECS) - This is a switch that is used in order to control the operation of the genset. The switch has four positions: "OFF RESET", "AUTO", "MANUAL START" and "COOLDOWN STOP".
Engine running signal - This is an input to the PLC that is 24 DCV when the engine is running. This voltage is zero when the engine is not running.
Error limit - This is the difference between the base load setpoint and the actual power output of the generator.
Emergency stop push button (ESPB) - This is a two-position switch. This switch has a mushroom shaped button. This switch is pushed in order to initiate an emergency shutdown of the genset. This switch is pulled out in order to reset.
Fuel Containment Lamp - This indicator will illuminate when the sensor for the fuel rupture basin for the power module senses fluid in the fuel rupture basin.
Fuel Containment Timer - This timer prevents nuisance alarms for the presence of fluid in the fuel rupture basin.
Generator circuit breaker - This circuit breaker interrupts the connection between the generator and the utility or load. This interrupts the connection during fault conditions. This interrupts the connection when normal opening and normal closing of the circuit is required.
Generator shunt trip - This is an electrically operated solenoid within the circuit breaker. This solenoid causes the circuit breaker to open by using energy that is stored in a spring.
Generator unload level - This is the setpoint for the low power output of the generator. This is the point when the generator circuit breaker is opened. This occurs during the gradual unloading of the generator.
GMR - This is the generator multifunction relay. This is a digital protective relay that senses voltages and currents of the power system. This relay protects the generator during fault conditions. This relay protects the generator during abnormal operation.
GSC+ - The generator set control + is an electronic control module that is located in the switchgear. The GSC+ monitors the engine and the generator. The GSC+ controls the engine and the generator.
Load - This is the process of achieving the output power of the generator.
Load management - This is the mode of operation of the genset which provides power to the loads.
Load share module - The load share module senses the power output of the generator. The load share module provides a signal that is between 0.5 DCV and 4.5 DCV. This signal is used in order to adjust the power output.
Local start - A local start will start the genset. A local start is done by touching the "START LOAD" button on the "MAIN" screen.
Lockout relay - This is an ANSI Device 86. This is a manually resettable device that operates at a high speed. The device is operated by the protective relays. The protective relays are the GMR and the UMR. The lockout relay prevents the generator circuit breaker from being reclosed until the lockout relay is reset.
Louver control switch - This is a selector switch that is used for selecting the operating mode of the louvers. The louvers will automatically open when this switch is In the AUTO position. The louvers are opened manually if the switch is in the OPEN position.
Manual loading potentiometer (MLP) - This is a potentiometer that is used in order to adjust the load. This control is used when the generator is paralleled with the utility and the automatic load controls are not available.
Manual paralleling - The genset will perform the following operations during manual paralleling: start, go to rated speed, go to rated voltage, synchronized with the bus and parallel with the utility. The genset will become synchronized with the bus. The generator circuit beaker is manually closed to the utility.
Operational setup parameters - Operational setup parameters are set by the operator. These parameters control the operation of the genset according to the requirements of the power system or according to the requirements of the operator.
Peakshave mode - This is a mode of automatic paralleling. A remote signal starts operation of the genset. The peakshave mode is used in order to generate power during times of peak demand.
Permissives - Permissives are conditions that must be realized in order to close the generator circuit breaker.
PLC Running Lamp - This indicator will illuminate when the PLC is running.
Power circuit - This is an electrical circuit that contains the following items: conductors, a power source and a load.
Protective relay targets - This is a fault indication feature of the protective relay. This is a seal in feature of the protective relay. A target is reached when one of these items reaches a trip limit for a trip time delay period: a monitored current, voltage, or a power function.
PT ratio - The PT ratio is the ratio of turns of the primary winding to the number of turns of the secondary winding of the potential transformer (PT).
Ramp down - This is an automatic decrease in the power output of the generator. The decrease may be done gradually. The decrease may also be done in steps. This process continues until the generator is unloaded.
Rated load - This is the normal maximum output of the generator. This is the design load for the generator. The rated load is stated in kVA.
Remote mode - This is a mode of operation that uses a remote close signal in order to initiate starting the genset. A remote open starts the process of stopping the genset.
Remote stop - A remote stop occurs when the customer contacts for a remote stop close or the utility contacts for a remote stop close. These contacts are located outside of the switchgear.
Remote start - A remote start occurs when the customer contacts for a remote start close or the utility contacts for a remote start close. These contacts are located outside of the switchgear.
Remote start enable - This is a function that is selected on the touchscreen display. The remote start enable enables the genset to start from a remote location.
Remote start status - The remote start status is an area on the touchscreen display that indicates whether the Remote mode enable is present. The Remote start status indicates whether a remote start is present.
Remote Start Contacts - The contacts are wired to terminal points on the switchgear. The generator circuit breaker will trip open when electrical continuity exists between the remote start contacts. The engine will continue to run for the cool down period. The engine will shut down.
SCADA system - A SCADA system is a supervisory control and data acquisition system.
Screen for "ALARM HISTORY" - This is a screen that appears on the touchscreen display. The screen displays a history of the alarms. The screen will display the alarms even though the alarms are no longer present.
Screen for alarm list - This is a screen that appears on the touchscreen display. This screen displays alarms that are present.
"SETUP" screen - This is a screen that appears on the touchscreen display. This screen allows the operator to choose parameters that are adjustable.
Shutdown signal - The shutdown signal creates electrical continuity between terminal points in the switchgear. The generator circuit breaker will trip open when electrical continuity exists between these terminal points. When the shutdown signal is present, the engine will continue to run for the cooldown period. The engine will shut down.
Soft loading - This is an automatic increase in the power output of the generator. The power is increased gradually or the power is increased in steps. This continues until the generator output reaches a preset output level.
Source selective - This describes the selection that occurs between two AC power sources. The sources that are involved are the connection of the customer's AC shore power and the connection to the bus of the genset.
Speed adjust potentiometer - This is a potentiometer that is used in order to adjust the engine.
Standby kW - This is the normal maximum output of the generator for the standby mode of operation. The output is measured in kW.
Standby operation - During standby operation, the generator provides backup power when the utility power service fails.
Start load button - This is a button on the "MAIN" screen of the touchscreen display. This button enables the PLC to start the engine. This button enables the PLC to close the generator circuit breaker.
Status lights for the utility breaker - These lights are indicators that are located above the control switch for the utility breaker. The lights indicate whether the breaker is open or closed. A green light indicates that the circuit is OPEN. A red light indicates that the circuit breaker is CLOSED.
Stop load button - This is a button on the "MAIN" screen of the touchscreen display. This button enables the PLC to open the generator circuit breaker. This button enables the PLC to ramp down the engine.
Synchronization switch - This is a two-position switch. This switch can enable the synchronization lights. This switch can also disable the synchronization lights.
System start - The system start is the state of the software during the process of starting.
Tarp Relay Timer - The tarp relay timer starts counting down after the motor that closes the tarpaulin cover is energized. The bolt gets the time that is necessary in order to close before the motor stops.
Transduced watts - This is a display of the generator kW output. The display is obtained from the watt transducer.
Trip condition - A trip condition is one possible state of the GMR and one possible state of the UMR. The indicators on the "MAIN" screen will be yellow if the relay is tripped due to a fault.
Trip unit - This is an electronic protective device in the generator circuit breaker. This device monitors the current for the generator circuit breaker. This device trips the circuit breaker when an overload condition occurs. This device trips the circuit breaker when a short circuit fault condition occurs.
User-defined parameters - User-defined parameters are the parameters for control of the system that are adjustable in the field. Some of these parameters are protected by a password.
Utility circuit breaker - This is a circuit breaker that is provided by the utility in order to disconnect the power module from the utility. This circuit breaker is used in order to connect the power module to the utility.
Utility protection targets - The utility protection targets are a fault indication feature of the protective relay. The utility protection targets are a seal in feature of the protective relay. A target is reached when one of these items has reached a predetermined level: a monitored current, a monitored voltage, or a monitored power function. The target must be at the predetermined level for a time delay that has been preset.
"UTILITY TRANSFER TRIP" - The "UTILITY TRANSFER TRIP" indicates that the circuit breaker for the remote utility has tripped. The "UTILITY TRANSFER TRIP" activates a latching system. A push button that is located next to the indicator resets the latching system.
VPAP - The VPAP adjusts the VAR or power factor of the genset when the genset is paralleled with the utility.
Voltage adjust potentiometer (VAP) - The VAP adjusts the reference voltage for the regulator. This allows changes to be made in the output voltage of the generator.
Voltage reference - The voltage reference is a signal that varies between 0.5 DCV and 4.5 DCV. This signal is the output from the load share module. The output is an input to the speed control.
Watt transducer - The watt transducer senses voltages and currents in the generator. The voltages and the currents determine the generator power output. The output of the watt transducer provides feedback to the controller in order to indicate the generator output in kW.