GOZ-PT-H Secondary Voltage Drop Automatic Tester
Secondary voltage drop tester applies to test the PT error caused by secondary voltage drop.
Alternative Name
Secondary voltage drop tester, PT secondary voltage drop tester
1. Can realize three phase three wire, three phase four wire and single test.
2. Use industrial plastic case, strong and durable, ensure the safety of the test personnel and system.
3. Can auto shift the measurement range, ensure the accuracy.
4. Electronic circuit combined with DSP technique, good stability and strong anti-interface ability.
5. Auto calculate all the parameters refer to load after finished the test, convenient customers to analyze and test.
6. With LCD, menu operation, the test results can be stored after power off, can transmit the data connect with computer.
7. Use high capacity 7.2V11Ah lithium battery as power supply, no effect to loop, prevent the protection of the system. It also can be used if there was not power supply source on site.
8. Auto shift the measurement range: shift to different position according the test data during the test, ensure the accuracy and display.
9. Working time up to 24 hours (longest), can test under charged state.
10. With deft charger, convenient to measure, can connect with external charger to test if low power.
11. Small in volume , light in weight.
12. Wide secondary current / voltage measurement range. Can analyze the resistance and impedance of 1mΩ, test the online actual load of S degree CT (secondary rated current is 5A) when the working current is 50Ma. Can analyze the conductance and susceptance of 0.001mS when the working voltage is 5V.
13. Can store 480 groups test results, can save for 10 years after power off.
14. With LCD and RS232 communication interface.
1 .Service conditions
temperature:－5°C~40°C
relative humidity<95%(25°C)
altitude<2500m
Outside interference: without strong convulsion, without strong electromagnetic field
2. Main parameters of secondary voltage drop measurement
(1) measurement range:
ratio: 0.001%~19.99%
angle difference: 0.01' ~599'
(2) resolution:
ratio: 0.001%
angle difference: 0.01'
3. Intrinsic error
DX=±(1%×X+1%×Y±2d)
DY=±(1%×X+1%×Y±2d)
2d——quantization error of the device
4. Voltmeter accuracy: 0.5%
5. Working range
voltage:(50～120)V
6. Indicate action value of the device
error: ratio>20% or angle difference >600’
voltage<2.0V
7. Main parameters of PT secondary load measurement
(1) PT secondary load measurement
trans-admittance measurement range:0.001ms—50.0ms
trans-admittance measurement accuracy:
secondary voltage(50V－120V)
DX=±(1%×X+1%×Y±2d)
DY=±(1%×X+1%×Y±2d)
2d——quantization error of the device
Note: keep the measured voltage up 50V if the measurement value less than 0.2mS, the mean time keep the straight through wire of the meters at the center. Now the quantization error of the device is 5d.
(2)voltmeter:0.5%
8. Main parameters of CT secondary load measurement
impedance measurement range:0.1Ω—75.0Ω
impedance measurement accuracy:
DX=±(1%×X+1%×Y±2d)
DY=±(1%×X+1%×Y±2d)
2d——quantization error of the device
ammeter: 1%