Introduction
Ratio testers using ‘current balancing bridge’ circuits are now out dated. GDB-II is a new, fully automatic tester that measures transformation ratio, the polarity, the bracket and the inaccuracy of single phase and three phase. GDB-II incorporates breakthrough technology and design that gives accurate and reliable results, again and again.
Features
• Fully automatic: automatically measure transformer connection group, process transformation of group, calculate of ratio error, save test results, isolates test voltage and cutoff after test
• Test single phase and three phase transformers, the three phase test can be completed one time without conversion
• Recall and print last 30 test results
•The menu hints the operation, the Chinese character displays printing on built-in printer
• Micro-controller operated, front panel with legend
• recall stored last 30 tests results.
• When data exceeds 30, the last is saved as 30th and the 1st one is deleted.
• Fuse protection for line short circuit and reset protection for reverse connection of HV and LV winding
Specifications
• Power supply: 220V±10%, AC 50 Hz.
• Measurement ratio: 1:1000
• Accuracy: 0.2 class
• Test voltage: H.V.: 190V AC; L.V.: 0.19-190v AC （vary with ratio）
• Usage environment: temperature≤ 40º C ;relative humidity< 85% R.H.
• Dimensions: TRM-II: 40 x 30 x 20 cm
• Weight: 8 kg.
