2V165 Transformer Parallel Control Relay

The 2V16x Series relays are designed for the control of motor driven on-load power transformer tap changers. The 2V165 Series relays are designed to monitor & control the tap changers of up to four (4) transformers connected on a common bus & operating in the master slave control configuration. Master follower parallel control schemes traditionally use auxiliary switches on the tap changers to determine out of step errors. While this is a reliable & proven technique there are two significant drawbacks:

1. Wiring complexity between the tap changer auxiliary switches

2. Requirement for matched tap changers

The first issue is overcome by replacing each tap changer auxiliary switch with a TPI transducer (2V200), which sends a frequency signal proportional to the tap position. This requires only two wires for each tap changer & is simply wired back to the 2V165. The second issue is overcome with a user specified tap position logic table in the 2V165 to allow non-matched tap changers to operate together. The tap position of each transformer is monitored as well as the raise / lower commands initiated by the selected master voltage regulating relay. The 2V165 responds by sending the appropriate raise / lower commands to each tap changer in accordance with the tap position logic table.

Features

• uMATRIX PLATFORM
• Large STN graphics LCD
• System status LED indicators
• Simple menu setting procedure
• 40-300V DC aux. supply
• 20-70V DC aux. Optional
• Self diagnosis & fail alarm
• Size 4M case
• Made in Australia

CONTROL MONITORING
• Tap change out of step alarm
• Pre-configured parallel control schemes – refer 1M122 technical bulletin data display
• Tap position indicator input for up to four (4) transformer tap changers
• Reference tap position indicator output
• Transformer in step status

COMMUNICATION
• Optical isolated RS232 PC link
• Non platform specific PC programming software
• Optical isolated RS485 or RS232 network port
• MODBUS RTU compatible network protocol