HV Load Tap Changers | Franklin Electric Incon 1250 LTC

Franklin Electric Grid Solutions

HV Load Tap Changers By Franklin Electric

HV Load Tap Changers – Franklin Electric

The 1250 Load Tap Changer, from Incon by Franklin Electric, provides critical LTC Maintenance Data to assist in making informed decisions. This HV Load Tap changer continues to provide highly accurate local and remote indication of load tap changer position.

The 1250 LTC is suitable for applications including transformer load tap changer position and single-phase voltage regulator position. It also works in virtually all transformer load tap changers.

Franklin Electric Load Tap Changers LTC 1250

Franklin Electric 1250 Load Tap Changer


Franklin Electric Load Tap Changers LTC

Incon 1250 HV Load Tap Changer Features And Capabilities

  • Provides absolute position feedback
  • Tap Change Displacement (position variation, 0.1-degree resolution)
  • Total Operations Count
  • Number of Tap Changes “up to” or “down to” each Tap
  • Number of Consecutive Tap Changes in one Direction
  • Number of Days Since First or Last Change to Highest and Lowest Tap (Draghands)
  • Number of Days Since Passing Through Neutral
  • “Unstable Signal” and loss of signal detection
  • Momentary Relay Acknowledgement at Each Tap Change
  • High Tap and Low Tap Alarm Limits


Franklin Electric 1250 Load Tap Changers LTCBENEFITS of the 1250 LTC

  • Interfaces with PLC’s and PC-Based SCADA systems
  • Elapsed Time Clock
  • Full Duplex RS-232 Serial Communication
  • Addressable RS-485 Multi-Drop Communication
  • Programmable via the Serial Port
  • 2ea, Form A Dry Contact Relays
  • Proportional Stepped Analog Output
  • ASCII or MODBUS Protocols
  • Highly Visible 5 Digit LED Display
  • Small size fits in 1/8 DIN panel cut-out
  • Maintenance Free
  • Can be retrofitted to older LTC’s with existing synchros
  • Easy Installation and Programming
  • Flexible Communication Options

 

 

MODEL
DESCRIPTION
Model 1250 LTC HV Load Tap Changer

 

1250-LTC-U-W-Y = Options, see below
U = Output Options: 0
1
2
4


= 0-1 mA
= ±1 mA
= 0-2 mA
= 4-20 mA


W = Control / Isolation: R
I


= Hi/Lo Relay Limits
= Input Isolation


Y = Comm. Options: S
M


= RS-232 Serial
= RS-485 MODBUS


 

GENERAL
Input Signal: Synchro (5 wire) 90 V maximum
Resolution: ± 0.001% of full scale or 6 arc minutes
Accuracy: ± 0.02% of full scale maximum (0.01% typical)
Temperature Drift: ± 0.01% per °C
Operating Temperature: 0 ° to 55 °C
Humidity: 10% – 90% non condensing
Weight: 24 ounces
Voltage: 117 ± 10%
Frequency: 47 – 63 Hz
Load:


8 Watts, maximum


DISPLAY
Type: 5-digit LED
Digit Height: 0.56 inch (14.2 mm)
Viewing distance: 23 feet
Decimal point:


Field programmable (scaled modes only)


OPTIONAL ANALOG OUTPUT
Outputs: ± 1 mA
0-1 mA
0-2 mA
4-20 mA (requires 15 to 24 VDC external loop power)


Compliance: 10 Volts (0-1 mA, ± 1mA, 0-2 mA)
500 Ohms (4-20 mA)


Non-Linearity: ± 0.1% of full scale
Resolution:


12 bits (± 0.025% of full scale)


OPTIONAL HI/LO RELAYS
Contact Rating: 3A @ 125/250 VAC (resistive), 30 VDC