An AC Power Amplifier for Testing Instrument Transformer Test Equipment

被引：0
|
作者：
Mohns, E. [1 ]
Fricke, S. [1 ]
Pauling, F. [1 ]
机构：
[1] PTB, Bundesallee 100, D-38116 Braunschweig, Germany
来源：
2016 CONFERENCE ON PRECISION ELECTROMAGNETIC MEASUREMENTS (CPEM 2016) | 2016年
关键词：
Analogue power amplifier; voltage gain; transconductance; test equipment; instrument transformers;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper describes the design and setup of analogue power amplifiers for generating calibration signals for test equipment for instrument transformers. Two amplifiers have been set up for a rating of 600 VA and 70 VA, respectively. The 600 VA version is used for testing standard burdens, while the other one is used as a source for a calibrator for testing test sets for conventional and non-conventional current or voltage transformers. The amplifiers offer the possibility to switch between a voltage mode and a current mode. The bandwidth of the amplifiers covers the range from 16.7 Hz to at least 3 kHz. Different ranges between 80 V to 280 V in the voltage mode, and 2 A to 10 A in the current mode are realized with a transformer-coupled output stage. The gain accuracy is in the order of 1 %, while the stability is better than 0.01 %. The smaller amplifier will be used to set up future measurement systems in the EMRP project "Non-conventional voltage and current sensors for future power grids".
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页数：2
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