Model 1250B

Model 1250B

The Model 1250B provides highly accurate, local and remote indication of load tap changer position and other difficult synchro-based position readings, now with improved communications options.

Utility and Industrial Standard for Measurement of:

  • Transformer Load Tap Changer Position
  • Works with virtually all transformer LTC's
  • Single Phase Voltage Regulator Position
  • Liquid Level
  • Machine Position
  • Thickness Gauging
  • Spillway Gate Position
Product Information
Order & Spec Info
Downloads
  • Capabilities

    This sophisticated instrument can help solve tough position measurement problems

    • Provides absolute local & remote position feedback
    • Informs Dispatchers of LTC or Regulator position in real-time
    • Performs Non-Linear Conversion
    • Interfaces with PLC's and PC based SCADA systems
    • Addressable RS-485 Multi-Drop Communication
    • RS-232 Serial Communication

    Features

    • Programmable via the Serial Port
    • Proportional Linear or Stepped Analog Output
    • Programmable Hi/Lo Relay Limits
    • ASCII or MODBUS Protocols
    • Highly Visible 5 Digit LED Display
    • Small size fits in 1/8 DIN panel cutout
    • Highly Accurate over Multiple Turns

    Benefits

    • Easy Automation Interface
    • Proven Reliability
    • Maintenance Free
    • Retrofit to Older Systems
    • Simple Programming
    • Cost Effective
  • Ordering Information

    1250B-U-W-Y-ZZZ = Options, see below
    U = Output Options0
    1
    2
    4
    = (0-1 mA)
    = (±1 mA)
    = (0-2 mA)
    = (4-20 mA)
    W = Control / IsolationR
    I
    = Hi/Lo Relay Limits
    = Input Isolation
    Y = Comm. OptionsS
    M
    = RS-232 ASCII
    = RS-485 MODBUS

    Specifications

    GENERAL
    Input SignalSynchro (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 Temperature0 ° to 55 °C
    Humidity10% - 90% non condensing
    Weight24 ounces
    Voltage117 ± 10%
    Frequency47 - 63 Hz
    Load8 Watts, maximum
    DISPLAY
    Type5-digit LED
    Digit Height0.56 inch (14.2 mm)
    Viewing distance23 feet
    Decimal pointField 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)
    Compliance10 Volts (0-1 mA, ± 1mA, 0-2 mA)
    500 Ohms (4-20 mA)
    Non-Linearity± 0.1% of full scale
    Resolution12 bits (± 0.025% of full scale)
    OPTIONAL HI/LO RELAYS
    Contact Rating3A @ 125/250 VAC (resistive), 30 VDC
    • Panel cut out: 1.653 (42mm) x 3.543 (90mm)
    • Panel thickness: 0.1 (2.7mm) to 0.19 (5.0mm)