Yokogawa PR300 Power and Energy Meter - Manual (Page 47)

4-6 IM 77C01E01-01E
4.4 Phase Switching for Voltage and Current
Using an operation key ( ) of the PR300, the user can switch the phase of voltage, current, and
demand current (*1) for display.
• For this phase switching, “Voltage (phase switch indication),” “Current (phase switch indication),” and
“Demand current (*1)” must be set to the display pattern, and those settings seen on the Measured
Value screen.
*1 Only the PR300 with the demand measuring function can handle demand current.
How to Switch the Phase for Single-phase Three-wire, Three-phase Three-wire and
Three-phase Four-wire (2.5 element) Systems
Phase Indication lamps
Voltage-1
Current-1
Voltage-2 or Voltage-3
Current-2 or Current-3
How to Switch the Phase for Three-phase Four-wire System
Phase Indication lamps
Voltage-1
Current-1
Voltage-2
Current-2
Voltage-3
Current-3
How to Read the Phase Indication Lamp
Phase and wire system
Single-phase two-wire system
Single-phase three-wire system
Three-phase three-wire system
Three-phase four-wire system
Three-phase four-wire system
(2.5 element)
Voltage
Voltage-1
Voltage-1
Voltage-2
Voltage-1
Voltage-3
Voltage-1
Voltage-2
Voltage-3
Voltage-1
Voltage-3
Phase indication lamp turning on
A,B,C
A
A, B
B, C
A, B
B, C
A
B
C
A
C
R,S,T
R
R, S
S, T
R, S
S, T
R
S
T
R
T
R,S,T
R
R
T
R
T
R
S
T
R
T
Current
Current-1
Current-1
Current-2
Current-1
Current-3
Current-1
Current-2
Current-3
Current-1
Current-3
Phase indication lamp turning on
A,B,C
A
A
C
A
C
A
B
C
A
C
NOTE
● The phase indication lamps (“A,B,C” or “R,S,T”) chosen at the time of ordering are turned on. This
setting cannot be changed after delivery.
● In the single-phase two-wire system, phase indication lamp “A” or “R” turns on. This setting cannot
be changed.
●
In the three-phase four-wire system (2.5 element), the current can be measured only when it is in a
state of equilibrium.