NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–Noyafa Cable Tester
High-voltage bridge fault tester manufacturer High-voltage bridge fault tester manufacturers use a double-arm bridge to measure the high-voltage resistance of the transformer to determine the fault range. The operation method of the bridge and the DC resistance tester is very simple, and you can understand it after reading the manual . High-voltage bridge fault tester manufacturer High-voltage bridge fault tester manufacturers use a double-arm bridge to measure the high-voltage resistance of the transformer to determine the fault range. The operation method of the bridge and the DC resistance tester is very simple, and you can understand it after reading the manual . The DC resistance data standard is shown in the table below.
Those that do not meet the following standards can be transformer windings or terminals, etc.: 1) For transformers above 1.6mva, the difference between the winding resistances of each phase should not be greater than 2% of the three-phase average value. For windings without neutral point, the line-to-line difference should not be greater than 1% of the average value of the three phases. 2) For transformers below 1.6mva, the phase-to-phase difference should not be greater than 4% of the three-phase average value, and the line-to-line difference should generally not be greater than 2% of the three-phase average value.
3) The change should not exceed 2% compared to the value previously measured at the same site. The resistance values at different temperatures are converted as follows: R2=R1(T+T2)/(T+T1), where R1 and R2 are the resistance values at temperatures T1 and T2 respectively; T is the calculation constant, copper conductor 235, aluminum conductor 225. Can the slight inter-turn short circuit of a high-voltage motor be measured with a double-arm bridge? Yes, the inter-turn short circuit will cause a small DC resistance, and the double-arm bridge is used to measure the high DC resistance, and the piezoelectric motor cannot be measured with the double-arm bridge The micro-turn short circuit of , why the bridge can be measured under high voltage, in which Z1 (test object) and C0 (standard capacitor without loss) are high-voltage arms; R3 (adjustable non-inductive resistance), R4 (non-inductive resistance) and C4 (adjustable capacitor) is the low voltage arm.
The high pressure arms are separate components. The voltage they can withstand determines the operating voltage of the bridge. About bridge 1.
Overview QS1 AC bridge, is su M-16 product. Often referred to as a bridge, it can be used to measure the dielectric loss angle and capacitance of high voltage equipment. It can also be used to measure low voltage capacitance of capacitors, cables, etc.
When measuring high voltage, the bridge can be connected directly or in reverse. 3. The principle is based on the circuit design of the bridge.
The bridge arm 1 is the sample CX, the bridge arm 2 is the standard capacitor CN, the bridge arm 3 is the variable resistor R3, and the bridge arm 4 is the fixed resistor R4=1000/π= 3184 ohms and parallel capacitor box C4. When the bridge is balanced, the following relationship occurs: CX=CN*R4/R3 tgd=ωR4C410-6=C4(in uF)4. Complete set of 1.
The accessories provided by each bridge are: (1) a pair of high voltage input lines (2) a power line (3) three fuses (0.5A) (4) three bulbs 2. Complete set (1) br16 standard capacitor, QS1 AC bridge (2) br16 standard capacitor, sb854 power phase shifter, QS1 bridge power protection controller, QS1 AC bridge.
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