Use : Automatic votage control of OLTC for parallel operation transformers

- Processing Speed, Accuracy Improvement

- Parallel Operation Function(up to 8 sets of transformer)

- DVM Function

- Monitoring Function

- Event Data Record

- Tap Operation of OLTC Counting Function

- Communication Interface

Product

The product is automatic voltage regulator to operate transformer tap switching device (On Load Tap Changer, OLTC). It can control the voltage according to each load characteristics and can supporting parallel operation up to 8 sets of transformer without any additional devices and also, it can adjust the voltage effectively by bus/line voltage drop as it includes Digital Voltage Meter(DVM) function too.

Features

1. Processing Speed,    Accuracy Improvement	- Adopt 32bit Digital Signal Processor - Possible to measure 0.1V and 0.01A by 16Bit A/D Converter
2. Parallel Operation    Function	- Parallel operation methods : Master/Follower and CRC method - Possible to support parallel operation up to 8 sets of transformer
3. DVM Function	- Possible to regulate voltage though the voltage of bus and feeder    decrease rapidly
4. Monitoring Function	- Event data(up to 110ea) record
5. Tap Operation of OLTC    Counting Function	- Count and record the number of tap operation - Possible to forecast a maintenance time for on load tap changer
6. Communication Interface	- Offer communication interface with the RS-232C and RS-485 port - Check an information of event and change setting values through HMI    which is offered by manufacturer

Main functions

1. Control functions

- Automatic OLTC control for transformers in parallel operation

2. Metering function

- CT, PT input current(A) & voltage(V)

3. Communication function

- Front : RS232C, Rear: RS485

Specification

Control Power Source		DC 125V ±20%, 60Hz, 50Hz(Option)
Rated	Current	AC 5A
	Voltage	AC 60~160V
Input Contact	Current	1ea
	Voltage	1ea
	Digital	5ea(Volt-change 1, Volt-change 2, Parallel 1, Parallel 2, Manual)
	Analog	2ea(Potential Meter, 4~20mA)
Output Contact	Control	2ea('1a1b' contact×2ea)
	Alarm	3ea('1a1b' contact×3ea)
	Error	ea(Relay fault '1a1b' contact×1ea, Parallel On '1a1b' contact×1ea, Parallel Fault '1a1b' contact×1ea)
Communication	Front	RS-232C
	Rear	RS-485 for parallel operation
Outer Case	Structure	Draw out Type
	Material	Steel, Aluminum
	Size	230×330×90(mm)