Uni-Trend’s electrical tools aresuitable for testing all kinds of field power equipment,conduct power supplyline measurement and maintenance,
as well as for analyzing the power gridquality. It is also suitable for users who need to measure three-phase powersystemsand analyze harmonic waves.
1. ElectricalPower Quality
Ideal power supply should beperfectly balanced and symmetrical. However, power systems do not operate inideal states. Any interference factor to power systems will allow waveform todeviate from power system and influence power quality.
2. Electrical Power
The work done by the current in atimeperiod.It indicates the physical quantity of speed of energy consumption, Power（W）.
Each electrical device has anormal operating voltage (rated voltage). Nominal power on electricalappliances is rated power, and actual working
power of the electric appliancesis the apparent power.
Three-phase AC is composed of AC circuit that has three identical frequency, equal potential amplitude and phase difference angle of 120°.
If the capacitance and inductance of power system and power devices do not match, it will cause phase imbalance, and will change some
power factors in power supply system (reducing active power), finally, it will create power waste due to energy loss.
4. Harmonic Wave
It is the portion of energy in power supply system, excluding power in frequency of 50Hz. Harmonic wave is generated by current distortion
caused by nonlinear loads (for example, UPS power supply, switch power supply, frequency converter, rectifier, inverter, etc).
If harmonics are too large, high frequency interference with electrical equipment may cause damage and in severe cases, burn equipment.
Insulators are nonconductive. It is used for isolating and protecting sensitive circuits from high voltages and currents.
Insulators are affected by high voltage and environment (such as corrosive, sunny, humid, dusty and other environments) and lose
The gound or earth reference point of electricalpower system and electrical circuit; a common electric path for electrical current or a physical
connection to the earth. It falls into the following: operation grounding (zero line), lightening protection grounding (earth wire), shielding
grounding (earth wire), and static electricity protection grounding (earth wire).
7. RCD leakage protector
RCD is called residual current device, such as leakage protector. Leakage protector is a low-voltage safety protection device, and it is used
for preventing single phase electric shock accidents caused by leakage current.
If input or output RCD current is unbalanced, there may be leakage. RCD should work to protect circuit safety.
It is a phenomenon caused by incorrect installation, insulation layers aging, and improper maintenance of equipment.
Dangerous situations may occur when leakage currents are neglected.
Economic and energy loss will be created through wasted electricity.
It will cause a fire or greater security risks, resulting in a risk to life or other significant losses.
UT230Series（Digital Power Clamp Meter）
UT520Series（Earth Resistance Tester）
UT520Series（Multifunction Electric Tester）
UT520Series（Multifunction Electric Tester ）
UT520Series（Multifunction Insulation Earth Tester）