Fuji Bikes 5000G11S/P11S Meters for measuring main circuit, Meter Moving-iron, Rectifier type

8-3 Measurement of Main Circuit Electrical Quantity

The indicated values depend on the type of meter because the harmonic component is included in the voltage and current of the main circuit power (input) and the output (motor) side of the inverter. When measuring with a meter for commercial power frequency use, use the meters shown in Table 8.3.1.

The power-factor cannot be measured using power-factor meters currently available on the market, which measure the phase difference between voltage and current. When power-factors must be measured, measure the power, voltage, and current on the input side and output side, then calculate the power-factor using the following formula:

	Power − factor =		Power[W]		⋅ 100[%]
	3		⋅ Voltage[V] ⋅ Current[A]
Table 8-3-1 Meters for measuring main circuit
		Input (power supply) side				Output (motor) side	DC link circuit
							voltage
							(P(+) - N(-))
Item		Voltage	Current*	Voltage		Current

Meter	Ammeter	Voltmeter	Powermeter	Ammeter	Voltmeter	Powermeter	DC voltmeter
name	A	VR,S,T	WR,S,T	AU,V,W	V	WU,V,W	V
	R,S,T				U,V,W
Meter	Moving-iron	Rectifier or	Digital	Moving-iron		Digital power	Moving-coil
		moving-iron			Rectifier type
type	type		power meter	type		meter	type
		type
Symbol

Note: When measuring the output voltage using a rectifier type meter, an error may occur.

Use a digital AC power meter to ensure accuracy.

Fig 8-3-1 Connection of the meters

8-4