HEQG secondary voltage drop & load tester uses a large-capacity of lithium battery as the working power source, which can not only ensure the safety of the system, but also provide a relatively pure power source for the instrument, avoid power interference on-site and ensure measurement accuracy.
Overview
Product Introduction
HEQG secondary voltage drop & load tester uses a large-capacity of lithium battery as the working power source which can not only ensure the safety of the system but also provide a relatively pure power source for the instrument avoid power interference on-site and ensure measurement accuracy.
Functions and Characters
● Can realize automatic measurement for three-phase three-wire three-phase four-wire and single-phase;
● Using industrial plastic case strong and durable effectively guarantee the safety of testers and system;
● Can automatically switch measurement range to ensure test accuracy;
● Adopt electronic circuit combined with DSP technique to make test stable and strong anti-interface ability.
● Automatically calculate all the parameters refer to load after completing test which is convenient for customers to analyze and test.
● With LCD menu operation the test results can be stored after power off can transmit the data connect with computer.
● Use high capacity 7.2V11Ah lithium battery as power supply no effect to circuit prevent the protection of the system. It also can be used if there was not power supply source on site.
● Use clamp ammeter to sample current in the secondary load test need not disconnect the secondary circuit. Realize online test without power off.
● Working time up to 24 hours (longest).
● With deft charger convenient to measure can connect with external charger to test if low power.
● Small in volume light in weight.
● Wide secondary current / voltage measuring range. It can analyze the resistance and impedance of 1mΩ when the operating current is 50mA; It can test actual load of s-class current transformer online when the secondary rated current is 5A; It can distinguish the conductance and susceptance of 0.001mS under the working voltage of 5 V.
● Can store 480 groups test results can save for 10 years after power off.
● With LCD and RS232 communication interface.
Models
Technical Parameters
1. Environmental Conditions
- Temperature : -5℃ ~ 40℃
- Relative humidity : < 95% (25℃）
- Altitude: < 2500m
- Outside interference: no particularly strong vibration no particularly strong electromagnetic fields
2. The technical specifications when secondary voltage drop test
(1) Measuring range:
Ratio error: 0.001% ~ 19.99%; Angle error: 0.01’ ~ 599’
(2) Resolution:
Ratio error: 0.001%; Angle error: 0.01’
(3) The instrument error
-DX=± (1%×X+1%×Y±2 digits);
-DY=± (1%×X+1%×Y±2 digits).
2 Digit means the quantization error of the instrument.
(4) The accuracy of voltage meter: 0.5%
(5) Working range
- Voltage: (50 ~ 120) V
(6) The instrument indicates action value (Error prompt)
- Error prompt: when ratio error is more than 20% or angle error is more than 600’.
- Voltage prompt: when voltage is less than 2V.
3. The technical specifications when PT secondary load test
1) PT secondary load test
Admittance measuring range: 0.1ms ~ 50.0ms
Measurement accuracy of admittance:
- Secondary voltage: 50V~ 120V
- ∆X = ± ( X*1%+Y *1% ±2 digits )
- ∆Y = ± ( X*1%+Y *1% ±2 digits )
Note: when the measured values is less than 0.2mS the test voltage shall be maintained at 50V or more while paying attention to the feedthrough wire clamp remain in center. The quantization error of instrument is 5 digits.
2) The accuracy of voltage meter: 0.5%
4. The technical specifications when CT secondary load test
1) CT secondary load test
- Impedance measurement range: 0.1Ω ~ 50.0Ω
- Impedance measurement accuracy:
- ∆X = ± ( X*1%+Y *1% ±2 digits )
- ∆Y = ± ( X*1%+Y *1% ±2 digits )
2) The accuracy of current meter: 1%
2 Digit means the quantization error of the instrument.
- Temperature : -5℃ ~ 40℃
- Relative humidity : < 95% (25℃）
- Altitude: < 2500m
- Outside interference: no particularly strong vibration no particularly strong electromagnetic fields
2. The technical specifications when secondary voltage drop test
(1) Measuring range:
Ratio error: 0.001% ~ 19.99%; Angle error: 0.01’ ~ 599’
(2) Resolution:
Ratio error: 0.001%; Angle error: 0.01’
(3) The instrument error
-DX=± (1%×X+1%×Y±2 digits);
-DY=± (1%×X+1%×Y±2 digits).
2 Digit means the quantization error of the instrument.
(4) The accuracy of voltage meter: 0.5%
(5) Working range
- Voltage: (50 ~ 120) V
(6) The instrument indicates action value (Error prompt)
- Error prompt: when ratio error is more than 20% or angle error is more than 600’.
- Voltage prompt: when voltage is less than 2V.
3. The technical specifications when PT secondary load test
1) PT secondary load test
Admittance measuring range: 0.1ms ~ 50.0ms
Measurement accuracy of admittance:
- Secondary voltage: 50V~ 120V
- ∆X = ± ( X*1%+Y *1% ±2 digits )
- ∆Y = ± ( X*1%+Y *1% ±2 digits )
Note: when the measured values is less than 0.2mS the test voltage shall be maintained at 50V or more while paying attention to the feedthrough wire clamp remain in center. The quantization error of instrument is 5 digits.
2) The accuracy of voltage meter: 0.5%
4. The technical specifications when CT secondary load test
1) CT secondary load test
- Impedance measurement range: 0.1Ω ~ 50.0Ω
- Impedance measurement accuracy:
- ∆X = ± ( X*1%+Y *1% ±2 digits )
- ∆Y = ± ( X*1%+Y *1% ±2 digits )
2) The accuracy of current meter: 1%
2 Digit means the quantization error of the instrument.
