Explain the use of three phase phase voltmeter:
1, simultaneous measurement of three-phase voltage or four currents (including zero line current)
2, simultaneous measurement of three-phase AC voltage phase angle, current phase angle, power angle
3, measuring the grid frequency and phase sequence
4, automatic identification of transformer windings, capacitive and inductive loads
5, hexagonal display, color phase sequence analysis
6. Handheld three-phase phase volt-ampere meter active power, reactive power, apparent power, three-phase power and power factor measurement
7, data viewing and saving function
8, data static storage function
9, 3.5 inch TFT color display with touch function
10. Hand-held three-phase phase volt-ampere meter lithium battery power supply, once full can continue standby for more than 20 hours to continue pressing the button for 3 seconds The instrument enters the real power-on state, the meter will emit a “drip†sound, which proves that the instrument has been turned on and then release the button.
2. Measurement interface description
The boot meter automatically enters the measurement interface as follows:
Figure 2. Volt-ampere phase measurement interface
If three-phase three-wire is selected as the measurement method, the three-phase four-line icon will be changed to three-phase three-line with the touch pen. The same operation can achieve single-phase measurement. The instrument has data retention and save function. Touch the HOLD icon. The icon color changes from gray to HOLD. The measurement data is static. The save icon appears below. Touch the save icon to save the data. The data is saved in a loop and the new saved data will be automatically deleted. The earliest saved group of data, the viewing function can view the saved data. The purple icon will use R** (** stands for 01, 02...10) to scroll through the previous page icon and the next page icon. The above functions are also effective on the power measurement interface. Please press the icon power to enter the blue color as shown below to enter the power measurement interface. When the data is saved, the volt-ampere phase measurement data is also saved.
Measurement wiring
1, single-phase measurement wiring
As shown below:
Figure 5, single-phase electrical wiring
The single-phase electrical measurement connects the live line to the UA phase of the meter and the neutral line to the UN. The current clamp sensor clamps the fire wire to the IA jack.
2, three-phase three-wire wiring method
As shown below:
Line connection: Use dedicated voltage test lines (yellow, red and black), one end is inserted into the UA, UC, and UN phase jacks of the instrument, and the other end is connected to phase A, phase C, and phase B of the measured circuit respectively. phase.
Note: The yellow wire connects to the UA jack, the black wire connects to the UN jack, and the red wire connects to the UC jack.
Current line connection: Insert the IA and IC clamps into the IA and IC jacks of the instrument, and then insert the other end into the current loop to be measured.
High Pressure Plastik Welding
Wuxi Yuda Polyethylene Welder can meet ISO21307 welding standard. There is a need to examine current practice on a global scale and establish the best procedure(s) for the highest-quality, most reliable and efficient construction of PE butt fusion systems for gas and water distribution.
There are 3 following types of butt fusion welders to meet the standard ISO 21307 : 1. Single Low Pressure Fusion Jointing Welding Machines 2. Double low-pressure Fusion Welders 3. Sigle High Pressure Plastik Welding Equipment. As shown in the graphs of the various systems, the high pressure method of butt welding takes less time to make a weld than low pressure welding fusion. This is a very important factor in lowering the cost of installation, since the cycle times necessary for butt welding large diameter pipes are long. Using the high pressure poly welders means that daily productivity can be significantly increased. Here you can choose relevant SHP series high pressure hdpe welding machines from 40mm-1600mm.
