Use of ammeter calibrator
1, wiring principle of electric meter
Brief introduction of three-phase three-wire and three-phase four-wire measurement principles;
Three-phase three-wire measurement refers to the measurement of three-phase lines by using two power components, which is equivalent to connecting two ammeters (A and C are connected in series), two voltmeters (respectively connected in parallel between AB and CB) and two power meters (A and C are connected in series with current coils, and AB and CB are connected in parallel with voltage coils).
2. Three-phase four-wire measurement refers to measuring three-phase lines with three power elements, which is equivalent to connecting three ammeters (respectively connected in series with three phases A, B and C), three voltmeters (respectively connected in parallel between opposite N phases A, B and C) and three power meters (respectively connected in series with current coils of A, B and C phases and parallel with voltage coils of A, B and C phases).
3. The three-phase four-wire low-voltage watt-hour meter is connected to the wiring through the clamp meter.
Firstly, connect the plug rod at the head end of the voltage line to the A, B, C and N voltage terminals corresponding to the instrument panel according to colors, and connect the crocodile clamp at the end of the voltage line to the A, B, C and N phase voltage lines at the tail of the instrument to be tested. Then insert the clamp transformer of each phase into the interface of the corresponding tag, and then clamp the current line of the corresponding phase with the clamp transformer. (Note: The polarity must be connected correctly. The side marked with A, B and C of the clamp current transformer is the current inflow end, and the side marked with N is the outflow end).
Turn on the instrument switch. First, according to the parameters of the instrument under test, correctly set the corresponding parameters in the "Parameter Settings" interface, and then enter the corresponding interface for testing.
Three-phase four-wire low-voltage watt-hour meter adopts internal CT access test.
Firstly, connect the plug rod at the head end of the voltage line to the A, B, C and N voltage terminals corresponding to the instrument panel according to color, and connect the crocodile clamp at the end of the voltage line to the A, B, C and N phase voltage line at the tail of the instrument to be tested. Connect the plug rod at the first end of the current wire to the corresponding current terminal, marked positive current terminal and unmarked negative current terminal on the instrument panel according to color, connect the alligator clip (or insert) at the end of the current wire to both sides of the terminal board (I+ to the side away from the instrument and I- to the side close to the instrument), and then open the terminal board.
Turn on the instrument switch. First, according to the parameters of the instrument under test, correctly set the corresponding parameters in the "Parameter Settings" interface, and then enter the corresponding interface for testing.
At present, the connection mode of this terminal board is rare, and the clamp table connection mode can only be used for those without terminal board.
Basic situation of ammeter calibrator
High precision measurement of 1, three-phase current, voltage, active power, reactive power, power factor, angle, frequency and other electrical parameters.
2. On-site calibration of three-phase active and reactive inductive and electronic watt-hour meters and other electrical instruments.
3. On-site calibration of comprehensive error of metering device.
4. The voltage input is 0-400V, and the range is automatically switched to ensure the measurement accuracy.
5. There are two options for current input: terminal and clamp meter. The maximum measurable current is 500A a.
6. The hexagonal diagram is displayed in real time, the wiring error is identified in real time, and the electricity stealing behavior is controlled.
7. High-precision measurement of 7.CT ratio.
8. It is easy to store 200 pieces of calibrated measurement data.
9, can be equipped with a microcomputer, through the RS232 serial port to manage the data in the equipment, truly realize paperless office.
10, large LCD Chinese menu display, clear at a glance, easy to operate.
1 1, which can supply power from the power socket (AC220V) or directly from the power grid (AC80-400V), fully considering the field use conditions.
12, which can be equipped with a three-phase precision test power supply as a three-phase verification device.
13, strong field load adaptability, stable and reliable work.
14, small size, light weight, beautiful appearance and easy to carry.
What is the use method of the instrument calibrator and what is the basic situation of the instrument calibrator? These small series have been introduced in detail. There are many ways to use the ammeter calibrator, and the basic principle is similar, so it is still an instrument that is relatively easy to master. Basically, there are few ammeter calibrators on the market. If you need to buy an instrument calibrator, you can find a manufacturer to buy an instrument calibrator.