±0.1% (0.8 to
2000)
±0.25% (2001 to 4000)
±0.50% (4001 to 8000)
120 V ac ±10%, single phase,
50 ±2 Hz
or 60 ±2 Hz, 100 VA
Cat. No. 550503-47
40 V ac:
±0.1% (0.8 to
2000)
±0.15% (2001 to 4000)
±0.3% (4001 to 10,000)
±0.50% (10,001 to 15,000)
230 V ac ±10%, single phase,
50 ±2 Hz
or 60 ±2 Hz, 100 VA
Frequency
50/60 Hz (±2 Hz)
80 V ac:
±0.1% (0.8 to
2000)
±0.15% (2001 to 4000)
±0.25% (4001 to 10,000)
±0.50% (10,001 to 20,000)
Battery
operation
Optional inverter 12 V dc to
120 V/230 V ac
for operation from vehicle battery.
Test Result Storage
Internal,
non-volatile memory for storing up to 200 sets of three-phase
measured and calculated ratio, exciting current, phase, ratio
error, plus serial number and transformer type.
Excitation
Voltage
8, 40, or 80 V rms,
automatically or manually selected
Excitation
Current Range
Computer
Software
0 to 500 mA, 3 digit
resolution
Included software
for data storage, report printout, and download of data to a PC.
Optional software for remote control of the TTR and database
construction.
Turns Ratio
Range
8 V ac: 0.8 to 4000, 5 digit
resolution
40 V ac: 0.8 to 15,000, 5 digit resolution
80 V ac: 0.8 to 20,000, 5 digit resolution
Test Leads
Supplied with one
complete set of three-phase leads. A set of single-phase leads is
also available as an optional accessory.
Phase Deviation Range
±90 degrees, 1 decimal point
for the minutes display, 2 decimal
points for the degree display, or for the
centi-radian display
Transformer Winding Phase Relationship
ANSI
C57.12.70-1978
CEI/IEC 76-1:1993 and Publication 616:1978
AS-2374, Part 4-1982 (Australian Standard)
LCD module, 256 x 128 dots
(this translates to 42 characters by 16 lines)
Operating: 23° F to
122° F (-5° C to 50° C) Storage: -58° F to 140° F (-50° C to 60° C)
Dimensions
Relative
Humidity
10.5" (H) x 17.5"
(W) x 6.9" (D)
266.7mm (H) x 444.5mm (W) x 175.3mm (D)
Operating:
0 to 90% non-condensing Storage: 0 to 95% non-condensing
Weight
Protective
Devices
Approx. 16.5 lbs (7.5 kg),
instrument only,
Type T fuses per
IEC 127 designation, HV & LV shorting relays, heavy-duty varistors,
transient voltage suppressors, and gas surge voltage protectors.
not including leads.
Instrument Case
Light gray color ABS case with
lid and
carrying strap.
Measuring Time
8 to 20 seconds depending on
mode of operation
Transit Case
and type of transformer.
Rugged case for
storing/shipping the
instrument, all leads and
other accessories.
Measurement
Method
ANSI/IEEE C57.12.90
Optional Accessories
Power Inverter
It may be necessary to have a portable power source in the field.
Motor-generators are notorious for poor sinewave output, as well as
frequency instability. Since a vehicle is always available nearby, a
power inverter using the vehicle’s battery can provide the energy
needed to power up the TTR.
The optional inverter can
be connected to the car’s cigarette lighter. The inverter’s output
provides a true sine wave rated to deliver 125 watts of ac power. It
is also protected with features that will automatically shut off in
case of under-voltage, overvoltage, and over-temperature. The power
output is limited to 125 Watts, thus protecting it from being
overloaded.
Printer
Test results can be
documented using an optional thermal printer which is easily
attached to the TTR as shown below. A header can be printed that
provides spaces to write in the operator name,
transformer information, temperature, relative humidity and
comments/notes.
The header automatically
includes the test set Catalog number. The test results printout
includes ratio, ratio deviation in percent, phase shift, excitation
current, test date, test voltage, type of transformer (single or
three-phase), the configuration of the high and low voltage
windings, transformer tap number and polarity. Example TTR test
result.
TTR with shelf mounted printer
Calibration Standard
The Calibration Standard has been designed for
use as a reference transformer for checking the accuracy of the
Biddle Three-Phase TTR. The standard is also useful for
troubleshooting and repairing the
instrument. The Calibration Standard is available with a Calibration
Certificate of turns ratio and phase shift accuracy traceable to
NIST.
