General Information - MarelliMotori MEC-100 Manual De Instrucciones

1. GENERAL INFORMATION

1.1. INTRODUCTION – MEC-100 SERIES
The Marelli Motori Digital Regulation Systems included in MEC-100 series are microprocessor-based electronic devices for the
set-up and monitoring of the excitation system of Marelli Motori generators.
The configurability of the system and control parameters makes the MEC-100 series regulators flexible and suitable for a wide
range of applications. These regulators are completely resin-bonded and isolated to keep a high operating reliability even in
difficult working conditions (high levels of humidity, dust, salty atmosphere) and in presence of vibrations.
1.2. MEC-100 SERIES CHARACTERISTICS
1.2.1. Functions

Four operating modes:
o
Automatic voltage regulation (AVR Mode).
o
Power Factor Regulation (PF Mode).
o
Reactive Power Regulation (VAR Mode).
o
Field Current Regulation (FCR Mode).

Stability parameters which can be individually set (P.I.D.) or predefined standard parameterizations.

Soft start with a ramp which can be set, in AVR Mode.

Generators parallel operation by means of Reactive Droop Compensation.

Generator protections:
o
Field over-voltage.
o
Field over-current.
o
Generator over-voltage.
o
Generator under-voltage.
o
Generator over-current.
o
Loss of voltage sensing.
o
Diode Failure Monitoring.

Excitation limiters (over-excitation and under-excitation).

Under-frequency limiter.

Internal Inrush Current limiter.
1.2.2. Inputs

Generator voltage single-phase or three-phase sensing.

Current sensing on single phase (1A or 5A).

Network voltage single-phase sensing.

2 auxiliary analogue inputs (4-20mAdc) for the setpoint remote control.

8 contacts for external interface.
1.2.3. Outputs

PWM output up to a maximum of 10A in continuous current.

2 programmable output relays for signalling the occurred alarm.
1.2.4. Human-Machine Interface

An RS-232 communication port to interface with PC through MEC-100 Interface System software.

MEC-100 Interface System software for Windows® to set the generator adjustment and control parameters.
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