DTR Transformer Tap Changer Controller Automatic voltage regulation, analysis, and control functions for transformer applications. Control power transformer OLTCs to regulate voltage Transformer OLTC position Integrated Systems Event recording Counter of the tap position increases and decreases for rise and lower operations of tap changer Automatic voltage regulator Automatic/manual operation User Interfaces Three setting tables Configurable inputs and outputs Rear communication port (plastic or glass fiber optic, RS232 or RS485) BCD format inputs to detect tap changer position RS232 port, faceplate accessible GE-NESIS Windows® based programming software Mimic for increasing/decreasing commands and tap displaying Graphic display and keypad ModBus®, M-Link, and M-Link Plus communications protocols Control pulse outputs

DTR Transformer Tap Changer Controller The transformer tap changer controller DTR controls automatically the transformer on load tap changer, so that the power supply voltage is practically constant, independently from the load. In order to achieve this, the DTR is able to increase and decrease the OLTC in the power transformer. The DTR can be applied to any existing tap changer, as its settings and operation ranges, as well as its inputs and outputs, are fully compatible with all the OLTC available in the market. The DTR has been designed using the same hardware architecture as the DDS protection...

DTR Transformer Tap Changer Controller Typical Wiring Automatic Voltage Regulator INCREASE COMMAND DECREASE COMMAND COMMON INTERLOCKING 1 REGULATOR ALARM INTERLOCKING 2 SYSTEM READY EXCESSIVE OPERATIONS INCREASE DECREASE AUTOMATIC MANUAL STOP COMMON SUCCESSIVE OPERATIONS STOP COMMAND PROGRAMMABLE OUTPUTS CURRENT INPUTS CONTROL POWER SUPPLY

DTR Transformer Tap Changer Controller Technical Specifications Ordering METERING Frequency: Nominal Phase Current: Nominal Voltage: Auxiliary Voltage: COMMUNICATIONS Local Communication: LCD alphanumeric display with two lines of 16 characters per line; 20 button frontal keypad Remote Communication (local or remote PC and communications net): Mode: half duplex Speed: 1,200 to 115,000 bps Physical media: RS232 (ports 1 and 2) RS485 (port 2 optional) Plastic Fiber Optic (port 2 optional): Type of connector: HFBR-4516 Power supplied: 8 dBm Receptor’s sensitivity: -39 dBm Wave length: 660 nm Glass...