HZ30I High Voltage Schering Bridge For Capacitance Measurement

I. Introduction

The HZ30I high-voltage dissipation factor bridge is a high-precision high-voltage bridge for laboratory use, which can be combined with various high-voltage standard capacitors to form a high-voltage capacitor bridge. It is suitable for measuring the capacitance and loss angle tangent value tg of high-voltage power equipment such as power cables, high-voltage bushings, power capacitors, and transformers under high voltage δ， And the dielectric constants of various solid or liquid insulating materials（ ε） And the tangent value of the loss angle. It can also measure the ratio difference and angular difference of high-voltage transformers or voltage transformers. The bridge can be externally connected to a current transformer to expａnd the range. When measuring large capacitance, this bridge is a four terminal measurement with a lead compensation device to eliminate additional errors caused by wiring resistance. This bridge can also measure the inductance and Q value of the reactor. The HZ30I-3 range expander (optional) can expａnd the capacitance ratio of the main bridge from 1000:1 to 106:1. When the standard capacitance is 1000pF, the instrument can measure a maximum of 1000uF. The computer inside the instrument can automatically process the test data and directly display the capacitance value and dielectric loss value tg on the panel δ And the test voltage and the current flowing through the standard capacitor (Is), and the test results can be printed out through a printer

II. Main Technical Indicators

The bridge capacitance ratio Cx/Cs (when the rated ratio is 1:1) is 0 to 1.111110 in steps of 0.000001, and the magnification (K) variation range is 1000, 500, 200, 100, 50, 20, 10, 5, 2, and 1. The measurement range of capacitance depends on the size and capacitance value of the standard capacitor Cs, that is, Cx=Cs · K · (Cx/Cs)

Measurement accuracy of capacitance ratio value: ± 0.00005

Electric bridge tg δ The range is -0.111110 to+0.111110 in steps of 0.000001 (expandable to ± 1)

ltg δ The measurement accuracy of x is not greater than ± 0.2% tg δ x±5 × 10-5

Display of measured capacitance: Cx=(0.1~1111.1110) Cn

Dielectric loss display of measured capacitance: tg δ= - one point one one × 10-1 to 1.11 × 10-1

Overall dimension: 560 (width) * 410 (depth) * 390 (height) mm.

Weight: about 40 kg.