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PRECIMEASURE Exhibiting its Products in AFRICA ELECTRICITY, 15-17 November 2011, Gallagher Convention Centre, Johannesburg, SOUTH AFRICA. STAND No.: D19

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For Dry-Type Transformers

These Instruments are used for monitoring the temperatures of L.V. windings (upto 1000 volts maximum) of the dry type transformer. It will display winding temperatures and take necessary control action as per set and reset values programmed by the user. The protection system also records maximum temperature and will display the same along with corresponding channel number. Standard 4-20mA DC Signal Output and Optional RS-485 communication are available for connection to DAS / SCADA.
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Model 2241

RTD Based Digital Winding Temperature Scanners are used for Measuring and Controlling the Winding Temperature of Dry-Type / Cast Resin Transformers.


    This Scheme Consists of:

  • Pt-100 Sensors
  • Micro-controller based Transformer Protection System

    • Temperature Sensor
    RTD (Pt-100 DIN 43760)
    No. of sensor inputs
    Up to 12 Channels available
    Range
    0-300°C
    Resolution
    0.1°C
    Accuracy
    ±1°C
    Display
    Six Seven Segment LEDs, Two for Channel No. and Four for displaying Temperature
    Display Speed
    User Settable (1-99 Seconds)
    Communication
    Isolated RS-485 MODBUS RTU Communication(Optional)
    Enclosure
    IP-55, Aluminum Pressure Die-casted, powder coated all side Enclosure with acrylic Viewing window
    Mounting
    Projection mounting with Anti–Vibration pads and M6 Screws (Flush Mounting Optional)
    Operating conditions
    Temp.: 0-60 Degree Centigrade. R.H. : 95% Max. non-condensing.
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    Model 2241
    No. of Set-points
    Three (Fan, Alarm and Trip)
    Contact Rating
    5A @220V AC / 0.5A@220V DC
    Switch Contact Type
    1 Changeover SPDT Relay Contacts
    Supply Voltage
    90-260 V AC/DC (Other voltages on Request)
    Terminals
    Suitable for 2.5 sq.mm. wire
    Analogue Outputs
    4-20mA DC (Maximum burden 600 Ohms)
    Power Consumption
    5 Watts
    Insulation Resistance
    IR More than100Mohm when measured with 500V DC Megger
    High Voltage
    2KV RMS at 50/60 Hz for1minute, Between All Terminals to Earth
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    Model 2242 - CSA Approved

    "K" Type Thermocouple Based Electronic Temperature Controller (ETC) can Control up to 3 thermocouples in ventilated Dry-type transformer windings. Display the present winding temperatures and operate the relays by comparing the highest of the 3 winding temperatures to stored set point temperatures. This instrument is based on advanced microcontroller technology for better accuracy, self test & automatic calibration for complete range.

    2242 ETC is protected against surge, transient suppression, radio frequency interference, electrical noise and electromagnetic interference.

    The ETC 2242 is cord connected or permanently connected, Grounded, Equipment class1, Pollution degree 2, Measurement Category 2 and Installation Category II.

    Temperature Sensor
    "K" Type Thermocouples
    No. of sensor inputs
    3 Nos.
    Range
    0°C - 250°C
    Resolution
    1°C increments
    Accuracy
    ±0.8% ±one count under normal conditions. ±2% ±one count under extreme conditions.
    Communication
    RS-232C(Standard) & RS-485 MODBUS RTU Communication(Optional)
    Mounting
    Panel mount thru cutout
    Altitude
    5000m
    Operating conditions
    -30°C to +55°C, R.H. 95% (non-condensing)
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    Model 2242 - CSA Approved
    No. of Contacts
    4 Nos. Alarm, Trip, Fan-1 (Standard), Fan-2 (Optional)
    Contact Rating: Alarm & Trip
    8A Resistive at 240VAC, 10A Resistive at 120VAC,
    Contact Rating: Fan-1 & Fan-2
    30A Resistive at 240VAC, 30A Resistive at 120VAC,
    Switch Contact Type: Alarm & Trip
    1 Changeover SPDT Relay Contacts
    Switch Contact Type: Fan-1 & Fan-2
    N/O Relay Contacts
    Input Power
    120/240 VAC, ±15%, 50/60 Hz
    Analogue Outputs
    0-1 mA (10,000. Ohms max. Load), 4-20 mA (500 Ohms max. Load)
    Terminals
    Screw terminal; Maximum 12 gauge wire
    Power Consumption
    10W Max (at Full Load)
    High Voltage
    500 VAC 50/60 Hz for 1 minute: Terminal No 1 -11 OF TB1 & Terminal No 1-8 OF TB4
    1.5 KVAC 50/60 Hz for 1 minute: Terminal No 1-10 OF TB2 & TERMINAL NO 1-8 OF TB3
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