OCEM DIAM3200 IGBT, Руководство по эксплуатации и обслуживанию

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DESCRIPTION
UT-MT-0938_1.0_30-03-2023 (EN)
Use and Maintenance Manual
DIAM3200
12
2.2 Operating principle
The control and management system of the device is scheduled to manage the operation of the constant current
regulator automatically. The unit also provides the possibility of advanced functions, which can be activated by the
user if required (Wig-Wag mode and 4-20 mA mode).
When a brightness level is selected, the system activates the main contactor and adjusts the bipolar transistors to
supply the output series circuit with a current value in accordance with the set value.
The device continuously measures the loop current (via a Hall effect sensor), which is compared with the set value.
The detected rejection is used to correct the operating parameters via a digital regulator.
The dischargers on the output line of the device (OLA) protect the device from any overvoltages in the circuit.
The burnt lamps detector (LFD) allows the detection of the presence of burnt lamps on the series circuit. If used,
the LFD function must be properly configured and calibrated on the field.
Optional devices perform control and monitoring of the operating parameters, disconnection manoeuvres of the
output circuit to the load, and input overvoltage protection, simplifying the operation and functioning of the device:
●
An insulation monitoring system (EFD) allows continuous analysis of the resistance value between the series
circuit and earth, signalling the exceeding of the pre-alarm and alarm thresholds.
●
An output disconnection device (CUT-OUT) simplifies the maintenance on the HV side: units equipped with
the disconnection device can be serviced without the need to disconnect the series circuit terminals and
the earth connection.
●
Input discharger (ILA) system to protect against overvoltages on the unit's supply line of the device.
In addition to local control, the constant current regulator can also be controlled remotely through suitable connection
interfaces. Supervision of the constant current regulator management system can be done through the integrated
display and keypad, or through the Alize software interface (using an external PC connected via USB cable to the
controller).
By means of the optional integrated output circuit selector (ICS), it is possible to select which portion of the series
circuit to power, in addition to the set current level.