TWJB-03A Modern Microcomputer Relay Protection Tester
Modern microcomputer relay protection testers can be divided into two types. One type uses traditionalOCLpower amplifiers, which are large in size and weigh around25Kg, making them relatively heavy and cumbersome. The power amplifier tubes operate in the amplification region and are prone to damage over time, with a narrow dynamic range and low accuracy. The other type uses switching power supplies and digital power amplifiers, which are small in size, light in weight, and highly efficient, representing the development direction of relay protection testers.
TWJB-03Arelay protection tester is a new type of miniaturized microcomputer relay protection tester realized by summarizing the advantages and disadvantages of similar products at home and abroad, extensively listening to user opinions, and fully applying modern microelectronics technology and power electronics technology. It adopts internationally popularDSPand switching amplifier technology. Its standalone operation capability is already very powerful, and when paired withPCsoftware, it can be connected to a computer for operation, making its functions even more enhanced. Its volume and weight are only half of traditional testers, and its advanced design concept has brought this tester to an internationally advanced level.
Technical Parameters
1、 Current Source:
AC amplitude:0～40A/phase 0～120A/three-phase parallel
DC amplitude:0—30A/phase 0—90A/three-phase parallel
Power:400VA/phase
Accuracy:0.2%, Response time<160μs,
Resolution:AC1mA, DC2mA
2、 Voltage Source:
AC amplitude:0～125V/phase Line voltage0---250V
DC amplitude:0—110V/phase
Auxiliary power supplyVZ:3V0 0～110VDCor0—220VDC
Maximum power:50VA/phase Accuracy:0.2% Response time<120μs
Resolution:AC2.5mV DC3.5mV
3、 Frequency:Range0—1000Hz Resolution0.001Hz(power frequency)0.1Hz(1KHz)
4、 Phase:Range0—360degrees Resolution:0.1degrees Accuracy:0.1degrees
