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- Ratio Testing: PT/VT from 0.8000:1 to 8000:1 and CT from 0.8000 to 1000.0 (Auto-Ranging)
- Tests performed by exciting the primary and reading the secondary; provides safer conditions for the operator on step-down transformers
- Continuity test indicates open or loose (high resistance) terminal connections
- DC test mode eliminates errors due to magnetic build up
- Stores up to 10 primary/secondary nameplate voltages to use in comparing test results
- Displays ratio, test current, winding polarity, and deviation from nameplate voltage or ratio
- Stores up to 10,000 test results
- DataView® software included which allows configuring the instrument, downloading stored measurements and printing of test results in a report format
- Display warns of incorrect lead connection, reverse polarity, open and short circuits
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- Power transformers
- Potential transformers
- Current transformers
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The DTR® Model 8510 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® Model 8510 accurately measures primary to secondary turns ratio, while simultaneously displaying polarity and excitation current. The DTR® is fully automatic and uses an ANSI/IEEE compliant test method. No user calibration, range selection, hand cranking or tedious balancing is required. At each measurement, the DTR® automatically self-calibrates and checks for open windings/connections/circuit breakers, short circuits (excess excitation current), incorrect test lead placement, and reverse polarity. Measurements are displayed quickly and accurately. |
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| Model |
DTR8510 |
| Ratio Range |
Auto-Ranging, 0.8000:1 to 8000:1 |
| Accuracy |
<10 to 1: ±0.2% of Reading Ratio 0 to 1000 to 1: ±0.1% of Reading
Ratio >1000 to 1: ±0.2% of Reading Ratio 5000 to 8000.0 ±0.25% of Reading |
| Excitation Signal |
PT/VT Mode: 32Vrms maximumCT Mode: 0 to 1A Auto Level, 0.1 to 5Vrms |
| Excitation Current Display |
Range: 0 to 1000mA; Accuracy: ±2% of Reading ± 2mA |
| Excitation Frequency |
70Hz |
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| Display |
LCD 16Character, 2 line, large format, LED backlight, day/night visible |
| Measurement Method |
In accordance with ANSI/IEEE C57.12.90 |
| Power Source |
2 Rechargeable NiMH batteries(included) |
| Battery Life |
Up to 10 hrs continuous operation. May be used while recharging. Low battery LCD indication. |
| Charging Time |
<4 hrs typical, C/10 rate |
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