Himoinsa CEA7 User Manual

OPERATION | PAGE 16
The start/stop key in the OFF position causes a controlled stop if it is running;
once the engine has stopped, power to the CEA7 control unit is disconnected.
4.7 START-UP BY LOAD DEMAND
DESCRIPTION
This function enables automatic start up and activation of generator set charging
depending on the power consumption of the network. Start up is performed based on
the programming of a maximum network power threshold (kW) that is consumed by
the installation over a certain period of time. Once the generator set is started, the
system changes genset power leaving the network free of load. Once the power
consumed by the installation is below the set threshold and the set time has elapsed,
the system returns to charging the installation from the network and the genset
begins its stopping cycle.
PROGRAMMING
The generator set will start operating, acquiring this load, when network power
consumption is detected which more than the limit set by parameter (Threshold table,
parameter 34). The genset will continue to operate until the genset power consumption
measured falls below a limit set by parameter (Thresholds table, parameter 35). Both
with the start and stop of the genset due to load demand, the conditions must be
validated for a programmable time (Times table, parameter 27). The function of start
up due to load demand is only enabled in Automatic mode of the CEA7 control unit.
4.8 ELECTRONIC PROTECTION
DESCRIPTION
The electronic protection is a feature that permits a control unit output to be
activated in the event of an overload and short circuit alarm. This function allows
the genset's main circuit breaker to be disabled via the trip coil. While any of
these alarms that causes the engine to stop (immediate or cooling) remains
active or pending notication, the output assigned to electronic protection
remains active.
4.5.1 ALTERNATOR MODE
Operation of the CEA7 control unit's battery charging alternator congured to
alternator mode, excites the alternator via a pulse with a congurable duration
(Times table, parameter 8) during engine start process through the D+ output of
the measurements module. At the end of the pulse, the control unit tests the
voltage generated by the battery charging alternator.
The voltage generated by the battery charging alternator can be used as an
engine running condition (Regulations table, parameter 20). For this purpose, the
control unit waits to measure voltage, via the DI analogue input, which is above
an alternator voltage detection threshold (Threshold table, parameter 21).
The CEA7 control unit can be congured to produce an Alternator Voltage alarm
(Alarms table, parameters 10 to 12) if a low voltage supplied by the battery
charging alternator is detected through the DI analogue input of the
measurements module if it is set to alternator mode.
4.5.2 DYNAMO MODE
Operation of the CEA7 control unit's battery charging alternator congured in
dynamo mode, excites the alternator via a continuous pulse through the D+
output of the measurements module while the engine is in start up phase or is
running.
The control unit congured in dynamo mode cannot use the voltage measured via
the DI analogue input for detecting an engine running condition.
The CEA7 control unit can be congured to produce an Alternator Voltage alarm
(Alarms table, parameters 10 to 12) if a low voltage supplied by the battery
charging alternator is detected through the DI analogue input of the
measurements module.
4.6 START/STOP KEY
The start/stop key in the ON position causes power to be supplied to the CEA7
control unit's electronic devices (measurements module and display module).

Himoinsa CEA7 Specifications

General

Brand	Himoinsa
Model	CEA7
Category	Control Unit
Language	English