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Power Measurement

Process Control

Energy Management

Power Factor Correction Panel

AC VOLTAGE CONTROLLER VC9090

Applications

Protection against over voltage and
under voltage in power plants and
distribution systems
Protection of AMF panels and
generators
Various points in Sugar mills, Food
processing, Chemical, Cement, Fertilizer

Features

Micro controller based design
IDMT and definite time characteristics
High pickup and drop off ratio
Non-Volatile memory for data storage
True RMS voltage reading of phase and line
Bright LED Indication
Fault condition store and replaying
Calibrated for Full scale direct reading
Six digit LED display
Front Panel membrane keypad
96 x 96 ABS plastic enclosure

General Description

ICD AC Voltage Controller is a Protection device for Power System equipments, feeders, and machines against 3 phase system Voltage disturbances. ICD Microcontroller based AC Voltage Controller is designed to measure True RMS voltage of all 3 phase and line voltages. From the samples taken it accurately detect the phase reversal and single phasing. From the measured RMS voltage, unbalance between lines, under voltage and over voltage of each line is computed. All these three parameters are compared with set point, settable in percentage. During fault condition the relay will be deenergized after a definite time delay which is also settable. The 3 line voltages, control settings and time delay are shown on six digit 0.39” seven segment red LED. When the fault has occurred, the display shows respective fault details with readings. Normal operation can be restored by manual reset or automatically when the fault is cleared. This device is designed to operate on SMPS suitable for 90 – 275V AC supply.

Protection Against

Unbalance
Over Voltage
Under Voltage
Phase Reversal
Phase Failure

Technical Specfication

Voltage Input : 80 - 520V AC line to line for LT
25 - 140V AC line to line for HT
Frequency range : 45 to 55 Hz.
Display : 6 digit 0.39” seven segment Red LED
Resolution : 0.1V for LT, 0.01KV for HT
Indicating Accuracy : ±0.5% + 1 LSD
Operating Range : 25% to 150% of full scale
Displayed parameters : R, Y, B, RY, YB, BR voltages
Faulty condition display : The last reading at which fault occurred is stored and displayed
PT ratio for HT : Programmable through keypad

CONTROLLER

Under voltage setting : 0.99 to 0.5 of full scale
Over voltage setting : 1.01 to 1.3 of full scale
Unbalance setting : 1 to 30%
Time delay set 1 : 1 - 150 secs in steps of 1 seconds for unbalance, over voltage and under voltage
Time delay set 2 : 1 – 60 secs in steps of 1 seconds for Phase failure and phase reversal
Relay action : Relay is energized for normal operation and de-energized under fault condition
Output : 1 C/o Potential free relay contact
Contact rating : 5Amps at 230V AC
Relay reset on fault 1 condition : Relay reclosed on reaching the percentage set value
Relay reset on fault 2 condition : Manually reset
Fault 1 category : Under voltage, Over voltage and Unbalance
Fault 2 category : Phase reversal and Phase failure
Pickup : Over voltage – 95% of set value
Under voltage – 105% of set value
Dropout : Over voltage – 3% after set value
Under voltage –3% before set value
Status Indication : Available for UV, OV, UB, Phase Reversal, Phase failure
Aux. Power Supply : 90 – 275VAC
Box dimension : 96 x 96 x 120 mm
Mounting : Panel

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