Multi-function power meter is a multi-function intelligent instrument with programmable measurement, display, digital communication and energy pulse transmission output. It can complete power measurement, energy metering, data display, acquisition and transmission. Multi-function power meter is widely used in substation automation. , distribution automation, intelligent buildings, energy measurement, management, and assessment within the enterprise. But in the use of more or less will encounter some minor problems, let us look at the problems and solutions encountered in common use.
1. Problem: The analog output signal doubles
Answer: The cause of the fault is judged: it may be caused by the wiring of the system.
Solution: Whether to use two AO outputs at the same time and the negative terminal is grounded at the same time. If yes, the two outputs will interfere with each other. It is recommended to install a signal isolator to solve the problem.
2. Problem: DI switch input background display suddenly and suddenly, false alarm
Answer: Fault reason judgment: It may be due to the phenomenon that the auxiliary contact of the switch on the line has a virtual connection or the background setting
Workaround: Check the line and background system settings
3. Problem: The digital input is not closed
Answer: Fault reason judgment: It may be due to the phenomenon that the auxiliary contact of the switch on the line has a virtual connection or the background setting
Workaround: Check the line and background system settings
4. Problem: The relay output is abnormal.
Answer: Fault cause judgment: check wiring or relay settings
Solution: The relay output has three modes: level, pulse and alarm. There are two output modes: level and pulse. For details, please refer to the product manual or contact technical support.
5. Problem: DO output is abnormal
Answer: Fault cause judgment: check wiring or DO setting
Solution: DO output mode has electric pulse output and alarm output. For specific wiring, please refer to the product manual or contact technical support.
6. Problem: Instrument wiring is no problem but no communication
Answer: Fault reason judgment: instrument setting
Solution: Check whether the meter setting address and baud rate correspond to the system software. All instruments connected to the same communication channel must ensure that the addresses do not overlap and the baud rate is consistent.
7. Problem: The instrument backlight is blinking
Answer: Fault cause judgment: View instrument alarm settings
Solution: If the meter is in the alarm state, the backlight of the instrument will flash. After the alarm is cancelled, the backlight will return to normal.
8. Problem: The meter cannot enter the parameter settings
Answer: Fault reason judgment: It is possible to inadvertently set a password
Solution: Please contact technical support to help solve
9. Problem: The current and voltage are displayed correctly, and the power display is abnormal.
Answer: Fault cause judgment: voltage or current wiring problem
Solution: Carefully check the voltage or current wiring for phase-to-phase interchange and reverse connection.
10. Problem: The analog output signal doubles
Answer: The cause of the fault is judged: it may be caused by the wiring of the system.
Solution: Whether to use two AO outputs at the same time and the negative terminal is grounded at the same time. If yes, the two outputs will interfere with each other. It is recommended to install a signal isolator to solve the problem.
11. Problem: The meter has no display
Answer: Fault cause judgment: Confirm whether the power supply voltage is input normally;
Solution: Check whether there is a virtual connection in the instrument power supply line. Use a multimeter to measure whether the voltage of the instrument incoming terminal (L+, N-) is normal and meet the ordering requirements. The DC power supply should distinguish between positive and negative, and pay attention to the output power of the power supply. Whether the requirements are met.
12. Problem: The meter failed to display the required function
Answer: Fault reason judgment: Check if this model meter contains this function.
Solution: The instrument ordered should be aware of the functions it contains, different models and different functions, should not be blindly wired, blindly used
13. Problem: The current and voltage display values ​​are too large or too small (multiple relationship with actual values)
Answer: The cause of the fault is judged: the CT and PT transformer ratio of the meter itself is not set.
Solution: You can check the user manual that came with the form or contact the technical support directly to help solve the problem.
14. Problem: There are some obvious errors in the voltage and current display values ​​(for example: B phase voltage is too large)
Answer: Fault reason judgment: may set the wiring mode problem
Solution: Change the wiring method of voltage or current according to the actual wiring of the system in the instrument settings.
Ev Charging Cable,Electric Car Charging Cable,Type 2 Charging Cable,32A Ev Charging Cable
Yangzhou JERI New Energy Co., Ltd. , https://www.jrevcharging.com