Q72-FTZ three-phase power factor table

The Q72-FTZ three-phase power factor meter is embedded and installed on ships or other mobile power equipment devices to measure the active power under balanced or unbalanced phase loads in three-phase AC networks.

　　Q72-FTZ three-phase power factor tableEmbedded installation on ships or other mobile power equipment devices to measure active power under balanced or unbalanced phase loads in three-phase AC networks.

　　Q72-FTZ three-phase power factor tableMain technical indicators

Accuracy: Level 1.5 Shell Protection: According to IP22

Front panel size: 96 X 96mm, 72 X 72mm. Two types of instrument deflection angles:

Q72-FETC、Q96 —FETC: 90°

Q72-FTZ. Q96-FTZ: 240°

Power factor conversion: included in Q96 Q72 comes with a CVIOO-COS instrument scale: white background with black markings. If a value needs to be set, a red line can be drawn.

Rated frequency: 50Hz, 60Hz Instrument installation: fixed with 4 diagonal brackets Environmental temperature range: 25~55 ° C

Weight: Q72- FETC, Q96- FETC: 0.25kg

Q72 - FTZ、Q96 — FTZ:0.30kg

CV100-COS 0:0.65kg

structural principle

The Q72-FTZ three-phase power factor meter converts phase difference into voltage signal Convert the U-I phase difference to DC 0-3, drive the measuring mechanism, and indicate the corresponding power factor.

The phase difference voltage conversion circuit is either internally or externally attached, and its block diagram is shown below.

The measured voltage is divided by a resistor, and the chopper becomes a rectangular wave. The measured current and transformer, after sampling the resistor, undergo phase shifting and chopping, also become a rectangular wave. The two signals U and I are sent to the XOR gate, so that the pulse width is proportional to the phase difference between the voltage and current. This signal is integrated, amplified, and linearly adjusted to output DC 0-3 signals for the measuring mechanism to indicate. The voltage regulator circuit is taken from the measured voltage After rectification, filtering, and voltage stabilization, the output is ± 12V, which is used for the operation of various circuits.

The measuring institution adopts a magneto electric structure.