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General| Mechanical Life | 10, 000, 000 operations |
|---|---|
| Ambient Temperature | -40°C to +70°C |
| Operate Time | 15 ms max. |
| Electrical Life | 100, 000 operations |
| Dielectric Strength | 1, 500 VAC, 50/60 Hz between coil and contacts for 1 minute; 750 VAC, 50/60 Hz between open contacts for 1 minute |
| Vibration Resistance | 10 to 55 Hz, 1.5 mm amplitude |
| Shock Resistance | 10 G |
Precautions to prevent damage from electrostatic discharge to components.
Guidelines for safely handling electronic circuits and preventing ESD damage.
Step-by-step guide on how to enter the relay's setting mode.
Explanation of password protection for configuration settings and its importance.
Detailed steps for entering a password into the relay for access.
Instructions on how to change the existing password for the relay.
How to use a PC/Laptop for setting the relay via K-Bus/RS232.
How LDC regulates voltage at a remote point by compensating for line drop.
Avoiding situations where tapchangers run to limits, causing voltage control loss.
Range of supervision functions to block unwanted tap changes and provide alarms.
Detects tap changer operation without initiation or in the wrong direction.
Lists quantities requiring setting, their adjustment ranges, and step sizes.
Setting the system input voltage for regulation between 90 and 139V.
Setting the deadband limits for voltage regulation, 0.5% to 20% of Vs.
Setting the initial delay for tap change sequences (0-300 seconds).
Setting the delay between successive tapping outputs (0-120 seconds).
Compensating for line drop voltage using resistive and reactive controls.
Minimizing reactive circulating current in parallel transformers using compensation voltage.
How measured voltage, current, and frequency values are obtained and displayed.
How time-tagged event records are stored, accessed, and managed.
Information on alarm records, including watchdog status.
Operation of the watchdog relay indicating healthy or failed states.
How relay outputs can be allocated in masks to indicate alarm conditions.
Description of software packages like Courier Access, PAS&T, and CourierCom.
Performing control functions like setting changes and mode control via serial communication.
Enabling and performing remote setting changes via serial port, subject to password.
Enabling and performing remote selection of setting groups.
Controlling load shedding/boosting levels via Courier commands or opto inputs.
Responding to loadshedding/boosting commands via serial port if link SD2 is set to '1'.
Selecting load shedding/boosting levels using opto inputs assigned in input mask.
Input and output ratings for AC current, voltage, auxiliary voltage, and frequency.
Ratings for AC current, voltage input, auxiliary voltage, and frequency.
Specifications for output relays and watchdog relay.
Burden values for current circuits and reference voltage.
Burden values for circulating and line current circuits at different In ratings.
Burden for the reference voltage Vn=110V.
Burden on auxiliary supply based on energized relays and logic inputs.
DC supply burden for opto-isolated inputs.
Setting ranges and step sizes for control functions like voltage, deadband, and compensation.
Setting ranges for initial delay (definite/inverse) and inter-tap delay.
General expression for the inverse time curve and its calculation.
Setting ranges for definite time delay.
Setting ranges for supervision functions like undervoltage, overvoltage, and current detection.
Default and maximum settings for CT and VT ratios.
Accuracy specifications under reference conditions for current, time delays, and measurements.
Accuracy for overcurrent measurements.
Accuracy for definite and inverse time delays.
Dielectric withstand, impulse, and insulation resistance tests according to IEC standards.
Dielectric withstand voltage levels between terminals and case earth.
High voltage impulse withstand levels between circuits and terminals.
Insulation resistance requirement measured at 500Vdc.
Relay withstand capability against DC supply interruptions, AC ripple, and disturbances.
Withstand capability against DC supply interruptions.
Withstand capability against AC ripple on DC supply.
Withstand capability against high frequency disturbances.
Withstand capability against fast transient electrical disturbances.
Compliance with European Commission Directive on EMC.
Test for withstand capability against electrostatic discharge.
Test for withstand capability against radiated immunity.
Test for withstand capability against conducted immunity.
Limits for radiated emissions according to EN55011.
Limits for conducted emissions according to EN55011.
Specifications related to ANSI/IEEE standards for surge withstand and EMI.
Surge withstand capability according to C37.90.1 – 1989.
Radiated electromagnetic interference specifications according to C37.90.2 – 1995.
Environmental conditions for temperature, humidity, and enclosure protection.
Temperature ranges for storage, transit, and operation.
Humidity conditions specified for testing.
Enclosure protection rating (IP50).
Mechanical environment specifications for vibration, shock, bump, seismic, and durability.
Vibration response and endurance classes.
Shock and bump response and withstand classes.
Seismic class.
Minimum mechanical durability rating.
Preliminary steps before commissioning, including familiarization and reading guides.
ESD recommendations before handling modules outside their case.
Steps for inspecting the relay module and case for damage and correct wiring.
Ensuring proper case earthing connection to a local earth bar.
Warning about the dangers of opening CT secondary circuits due to high voltage risks.
Notes and equipment required for commissioning tests.
List of necessary equipment for KVGC202 relay commissioning.
Tests for verifying the auxiliary supply operation and watchdog contacts.
Verifying the auxiliary supply voltage and relay power-up status.
Energizing the relay and checking watchdog contacts and LED status.
Default settings and how to change system frequency from 50Hz to 60Hz.
Guidance on testing only the logic functions used in the application.
How to view and test current and voltage measurements.
Testing current measurement by injecting known current levels.
Testing voltage measurement by applying known voltage levels.
Commissioning tests for control functions based on application diagrams.
Testing the tap change control function by monitoring voltage and relay contacts.
Testing the load shedding/boosting function by adjusting system voltage.
Testing the integrated timer functions for tap change operations.
Testing the initial time delay for tap change initiation.
Checking the definite time delay characteristic for tap change initiation.
Testing the inverse time delay characteristic for tap change initiation.
Testing the delay between successive tap changes in a multiple sequence.
Testing supervision functions like undervoltage and overvoltage detection.
Troubleshooting common issues with relay functions, passwords, and software links.
Handling instructions before performing repair work on electronic components.
Procedures for replacing the user interface, main processor, and auxiliary expansion boards.
Replacing output relays and opto-isolators, noting calibration implications.
Steps for removing and replacing the power supply board.
Steps for removing and replacing the back plane.
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