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The DTR-8500 is a portable digital transformer ratiometer designed for
on-site testing of power, potential and current transformers. When
connected to a non-energized transformer, the DTR-8500 accurately measures
primary to secondary turns ratio, while simultaneously displaying polarity
and excitation current.
Rugged and reliable, the DTR-8500 is built into an attractive, sealed
structural polypropylene case designed to withstand the rigors of
industrial and utility field use.
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- Designed for power transformers, VTs, PTs and CTs.
- Direct readings from 0.8000:1 to 1500.0:1.
- Display turns ratio, polarity and excitation current
simultaneously.
- Dual power supply and operation: integrated rechargeable NiCD
battery and AC supply.
- Display warnings of incorrect lead connections, reverse polarity,
open and short circuits.
- Easy connection and test setup: no calibration or balancing
required.
- Large dual line display with adjustable contrast and backlight
ensures clear day/night visibility.
- Low battery indicator.
- Includes 15ft leads.
- Power transformers.
- Potential transformers.
- Current transformers.
Model
DTR-8500 Datasheet PDF (511kb) |
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Ratio Range |
Autoranging, 0.8000 to 1500.0:1 |
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Accuracy* |
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Ratio <10 to 1: |
±0.2% of Reading |
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Ratio ≤10 to 1000 to 1: |
±0.1% of Reading |
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Ratio >1000 to 1: |
±0.2% of Reading |
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Excitation Signal |
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PT/VT Mode: |
44Vrms maximum |
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CT Mode: |
0 to 1A Auto Level, 0.1 to
5Vrms |
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Excitation Current Display |
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Range: |
0-1000mA |
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Accuracy: |
±2%
of Reading ±2mA |
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Excitation Frequency |
70Hz |
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Display |
LCD Character, 20x2, large
format
LED backlight, day/night visible |
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Measurement Method |
In accordance with ANSI/IEEE
C57.12.90 |
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Power Supply |
Dual operation; rechargeable
NiCd battery and 115V, 50/60Hz line supply. May be charge from 115V by
internal switch at any time |
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Batteries |
12V, 5 x 2 NiCd packs, 1300mAH,
Panasonic P-130SCR or equivalent |
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Battery Life |
Up to 10hrs continuous
operation - may be used while recharging |
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Charging Time |
14hrs typical, C/10 rate |
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Low Battery Indication |
LCD display |
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Line Fuse |
1.0A, 5 x 20mm, slow acting |
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Display Measurements |
Turns ratio, RMS excitation
current, polarity |
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Displayed Messages |
Incorrect lead connections, H/X
reversal (accidental step-up misconnection), short (excess excitation
current), open circuits, circuit continuity, low battery |
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Note* 23°C
±5°C, 50 to
70% RH, full battery charge, no external fields or noise. |
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Connections |
Cannon® XLR connectors and
large color-coded industrial clips |
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Leads |
15ft, H & X color-coded, in
carrying bag |
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Display |
Dual line alphanumeric 3.875 x
.875" with contrast adjustment and backlight |
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Operating Temperature |
32° to 122°F (0° to 50°C), 0 to
90% RH (without condensation) |
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Case |
Heavy duty structural
polypropylene (yellow) |
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Dimensions |
13 x 12 x 6" (330 x 305 x
152mm) |
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Weight |
14lb (6.4Kg) |
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Catalog No. |
Description |
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2116.21 |
Model DTR-8500 Digital
Transformer Ratiometer (220V) |
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Catalog No. |
Description |
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2118.47 |
Test lead set (30ft) in a carrying bag |
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Test lead set (30ft) in a soft carrying bag
Catalog #2118.47 |
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