Emco EE301-T, Manual

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IV. FAMILIARIZATION WITH VARIOUS INDICATIONS / CONTROLS :
A. INDICATIONS
1. 4x7 Segment Display (AVR) : Display lights when Auxiliary Supply is 'ON'.
2. 2x7 Segment Display (TPI) : Display lights when Auxiliary Supply is 'ON'.
3. ‘L’ Lamp : ‘ON’ whenever the PT voltage exceeds the 'LOWER
VOLTS’ set limit.
4. ‘R’ Lamp : ‘ON’ whenever the PT voltage falls below the ‘RAISE
VOLTS’ set limit.
5. UV / OV Lamp : 'ON’ whenever the PT voltage falls below the factory
set Undervoltage limit i.e. below 80% of the Nominal
voltage. This lamp will turn-off only when the PT
voltage raises above 85% of the Nominal voltage value.
This lamp will also be ‘ON’, when the PT voltage goes
above the factory set Overvoltage limit i.e. above 132V.
This lamp will turn-off only when the PT voltage falls
below 127V.
6. 'LR' Lamp : 'ON' when Lower Relay is energised.
7. ‘RR’ Lamp : ‘ON’ when Raise Relay is energised.
8. 'CF' Lamp : 'ON' when Control Fail Relay is energised, i.e. when the
PT voltage remains outside the bandwidth for more than
15 minutes.
9.‘TEST’ Lamp : ‘ON’ when AVR is in “TEST” mode.
B. CONTROLS
1. Power - ON : This is a toggle switch which when’ON’ supplies
Auxiliary Voltage to the instrument.
2. 'R’ Set : This is a variable control varying from 0.5V to 5.0V below
NVA setting. This control sets the (lower limit of the PT
voltage below which if the voltage reduces, then
corrective action will be taken by the instrument. The
setting is to be read on display.
3. 'NOM’ Set : This is a variable control to set the Nominal value of
PT voltage varying b 10% of 110V. This set
ting becomes the reference level around which L & R
setting can be varied. The setting is to be read on the
display.
4. 'L’ Set : This is variable control, varying from 0.5V to 5.0V
above NVA setting. This control sets the upper limit of
the PT voltage beyond which if the voltage rises,
corrective action will be taken by the instrument.
The setting is to be read on display.
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