INTRODUCTION | PAGE 3
1. INTRODUCTION
The CEA7 control unit is an electric network signal supervision device and
conducts supervision and control of power supply through the generator set. The
control unit consists of 2 different modules:
• Display module. The display module is responsible for carrying out the
information tasks regarding the status of the device and allows actions
to be performed by the user; through the display module the user is
able to control the control unit, as well as program and congure the
functions.
Through the display module, access is given to a record of the last 100
errors registered by the control unit.
• Measurements module. The measurements module is responsible for
performing the tasks of monitoring and control of the control unit. This
module is located in the rear panel to reduce wiring and increase the
control unit's immunity against electromagnetic noise. All the signal,
sensor and actuators are connected to the measurements module
(see appendix III).
1.1 MEASUREMENTS MODULE
The measurements module provides the following electrical signal characteristics,
both those generated and those from the network itself:
• Phase-neutral voltage.
• Phase-to-phase voltage.
• Current phase.
• Frequency.
• Active, apparent and reactive power.
• Power factor.
• Genset instant energy (kWh) and accumulated power (day, month,
year).
• THD (total harmonic distortion) of voltages and currents.
• Calculation of harmonics up to order 20.
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