Products Video
HM5002S-10A Three Phase DC Resistance Tester Wiring and Operation Video
Products Overview
Goldhome has developed the HM5002, a large-scale rapid DC resistance tester for power transformers that integrates three-phase synchronous testing, magnetic enhancement, and demagnetization functions. The tester features three-phase synchronous energization, independent sampling of current and voltage, and simultaneous measurement and display of three-phase resistance values and three-phase imbalance rate, significantly reducing the DC resistance testing cycle for transformers.
Safety Measures
1.Must read this manual carefully before using the tester;
2.The tester operator should understand the common knowledge on general electrical devices or instruments;
3.The tester can be used indoors and outdoors, but it should be protected from rain, corrosive gas, excessive dust, and high temperature;
4.The tester is a precision instrument and any severe vibration must be avoided;
5.The tester should be maintained, repaired and adjusted by professionals;
6.After the test, be sure to wait for the discharge alarm to stop before turning off the power and removing the test wires;
7.When measuring the no-load voltage-regulating transformer, the tap changer can be switched only after the discharge indication alarm stops.
8.During the test, do not move the test clips and the power lines.
Products Parameter
Output current:
Three-phase test: 10A+10A; 5A+5A; 1A+1A;200mA+200mA;20mA+20mA;
Single-phase test: 20A; 10A; 5A; 1A; 200mA;20mA;
Measurement range:
Three-phase test: 10A+10A: 1mΩ～0.6Ω;
5A+5A: 2mΩ～1.2Ω;
1A+1A: 10mΩ～6Ω;
200mA+200mA: 100mΩ～30Ω;
20mA+20mA: 10Ω～200Ω;
Single-phase test: 20A: 0.5mΩ～1Ω;
10A: 1mΩ～2Ω;
5A: 2mΩ～4Ω;
1A: 10mΩ～20Ω;
200mA: 100mΩ～100Ω;
20mA: 10Ω～20KΩ;
Accuracy: ±(0.2%+2 digits);
Minimum resolution: 0.1μΩ;
Operating temperature: -10～40℃;
Ambient humidity: ≤80%RH, no condensation;
Power supply: AC220V±10%, 50Hz±1Hz;
Tester dimensions: 428mm* 350mm* 230mm (L*W*H);
Tester mass: 11.2kg.
System Introduction
1.The operation panel of the tester is shown below:
IA, IB, IC, IO terminals: Current input terminals /outputterminalsfor YN winding measurement;
VA, VB, VC, VO terminals: Voltage input terminals for YN winding measurement;
Ia, Ib, Ic terminals: Current input terminals /outputterminalsfor D or Y winding measurement;
Va, Vb, Vc terminals: Voltage input terminals for D or Y winding measurement;
Printer: To print the resistance test results and other information;
Display: 7-inch color touch LCD screen, to display operation menu, test parameters and data records;
Power switch and socket:Including the main power switch and the 220V AC power socket of the whole machine;
Grounding terminal: It is used for grounding the whole machine case for grounding protection;
USB port: It is the port to connect the tester with U disk and used to export the test data from the memory;
RS232 communication port: It is the communication port between the tester and the host computer.
2.Test and Wiring Methods
Test wiring connections: Connect the tested product to the test terminals of the tester with the dedicated test wires and the ground wire firmly. Clamp the wiring clips are at both terminals of the coil resistance of the tested product respectively. Connect the power wires on the tester to the AC power input ports and turn on the power switch to the LCD screen lights up.
Test wiring classification on the two-winding transformer: Connect the yellow, green, red and black test clips on the Yn winding of the tester to the A, B, C, O bushings on the star connection side of the transformer at one time, and then connect the yellow, green, and red test clips on the D (Y) winding of the tester to the a, b, and c bushings on the corner connection side of the transformer respectively, so as to complete the measurement connection, as shown below:
Test wiring on three-winding transformer: After the HV and LV winding tests are completed, connect the test clips on the HV side to the MV side for testing.
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