Avr Check; Voltage Setting - Deif Multi-line 2 General Manuallines For Commissioning

Multi-line 2
Even if the AVR is adjusted by the gen-set manufacturer, it is necessary to go through the
following adjustments in order to be sure that the multi-line 2 can operate with the AVR.
The AVR should be tuned in according to the AVR/generator manufacturer's instructions. It is
imperative that the gen-set is able to operate smoothly before the control function of the multi-
line 2 is activated.
An initial voltage level setting must be made.
The voltage level setting procedure depends on the interfacing.
Relay output
• Disable the outputs from the multi-line 2.
• Run the generator with no load (open generator breaker).
• Adjust the voltage (on the AVR) to be nominal voltage.
Analogue output
The analogue output is a +/- 20mA signal which in most cases has to be converted into a
voltage using a resistor across the terminals (150Ω gives 3V DC at 20mA, etc).
Given the fact that especially the AVRs are sensitive to the external circuit impedance, it is
essential to carry out the initial setting of the AVR while the multi-line 2 is connected and the
control function disabled.
Putting the multi-line 2 in manual operation, MAN, disables the control function. This will 'disable'
the control outputs, but the generator protection is still active. If you fail to do this, you may
experience control problems later on.
AGC/BGC
• Go to MAN mode.
• Reboot the unit or activate the input 'reset analogue controller outputs'.
• Run the generator with no load (open generator breaker).
• Set the voltage (on the AVR) to be nominal voltage.
GPU/GPC/PPU:
• Deactivate terminal 25.
• Reboot the unit or activate the input 'reset analogue controller outputs'.
• Run the generator with no load (open generator breaker).
• Set the voltage (on the AVR) to be nominal voltage.
DEIF A/S

6. AVR check

Voltage setting

General Guidelines for Commissioning
Page 13 of 19