HZQS37G High Voltage Schering Bridge
1. Overview
The HZ QS37G High Voltage Schering Bridge is mainly used to measure the tangent value and capacitance of the dielectric loss angle of high-voltage industrial insulation materials. It adopts the classic circuit of Xilin Electric Bridge. It can mainly measure the dielectric loss (tg) and capacitance (Cx) of capacitors, transformers, various electrical oils, and various solid insulation materials under high voltage from power frequency to 1000Hz. The measurement circuit adopts the "positive connection method" to measure the insulation of the test object to ground. The bridge is composed of a bridge body, a high-frequency zero indicator, a standard capacitor, etc. This bridge is particularly suitable for measuring the dielectric loss (tg) and dielectric constant of various insulation oils and solid insulation materials( ε).
2. Technical indicators
2.1 Measurement Range and Error
The ambient temperature of this bridge is 20 ± 5 ℃, and the relative humidity is 30% -80%. It should meet the following conditions:
The technical instructions in the following table are required.
When Cn=100pF R4=3183.2() (i.e. 10K/π)
Measurement project measurement range measurement error
Capacitance Cx 40pF --20000pF ± 0.5% Cx ± 2pF
Dielectric loss tg 0-1 ± 1.5% tgx ± 0.0001
When Cn=100pF R4=318.3() (i.e. 1K/π)
Measurement project measurement range measurement error
Capacitance Cx 4pF --2000pF ± 0.5% Cx ± 3pF
Dielectric loss tg 0-0.1 ± 1.5% tgx ± 0.0001
2.2 Accuracy of capacitance and dielectric loss display:
Capacitance: ± 0.5%
Dielectric loss: ± 1.5% tgx ± 1 × 10-4