INTRODUCTION | PAGE 3
1. INTRODUCTION
The CEM7 control unit is a generator set power supervision and control device.
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 illustrations in 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 and cosine of FI.
• Instant energy (kWh) and accumulated power (day, month, year).
• THD (total harmonic distortion) of voltages and currents.
• Calculation of harmonics up to order 20.
To Next Page
Loading...
