Megger TTR310 - Loading of Test Transformer; Measuring Ranges; Accuracy; Measurement Method

M
AVTMTTR310 Rev 8 May 2016
10
Loading of Test Transformer
Less than 0.2 VA
Measuring Ranges
Turn ratio: 80 V ac: 0.8 to 45,000, 5 digit resolution
40 V ac: 0.8 to 25,000, 5 digit resolution
8V ac: 0.8 to 8,000, 5 digit resolution
Excitation Current: 0 to 500 mA, 3 digit resolution (±2% of reading +1 digit)
Phase Angle
Deviation:
± 90 degrees, 1 decimal point for the minutes display, 2
decimal points for the degree display
Accuracy: ±0.05 degrees
Limit of Ratio: (0.8:1 to 2000:1)
Accuracy
Turn ratio:
80 V ac: ±0.1% (0.8 to 2000)
±0.15% (2001 to 4000)
±0.25% (4001 to 10000)
±0.3% (10001 to 45000)
40 V ac: ±0.1% (0.8 to 2000)
±0.15% (2001 to 4000)
±0.3% (4001 to 10000)
±0.35% (10001 to 25000)
8 V ac: ±0.1% (0.8 to 2000)
±0.25% (2001 to 4000)
±0.35% (4001 to 8000)
Excitation Current (rms): ±(2% of reading + 1 digit)
Phase Angle Deviation:
(limit of ratio)
±3 minutes
(0.8:1 to 2000:1)
Measurement Method
In accordance with ANSI/IEEE C57.12.90 -2013