Chapter 5 Configuring the PM135 General Meter Setup
80 PM135 Powermeter Series
Volt/Ampere
Demand Period
The length of the demand period
for ampere and volt demand
calculations
1. Always specify the wiring mode and transformer ratings prior to
setting up setpoints and analog outputs.
2. The maximum value for the product of the phase CT primary
current and PT ratio is 57,500,000. If the product is greater, power
readings are zeroed.
Figure 5-6: General Setup Dialog Box – Basic Setup Tab
Table 9 lists the available wiring modes.
Table 9: Wiring Modes
3-wire Open Delta using 2 CTs (2 element)
4-wire Wye using 3 PTs (3 element), line-to-neutral voltage readings
3-wire Delta Direct Connection using 2 CTs (2 element)
4-wire Wye using 3 PTs (3 element), line-to-line voltage readings
3-wire Open Delta using 3 CTs (2½ element)
4-wire Wye using 2 PTs (2½ element), line-to-neutral voltage
readings
4-wire Wye using 2 PTs (2½ element), line-to-line voltage readings
3-wire Broken Delta using 2 PTs, 3 CTs (2½ element), line-to-neutral
voltage readings
3-wire Broken Delta using 2 PTs, 3 CTs (2½ element), line-to-line
voltage readings
In 4LN3, 3LN3 and 3BLN3 wiring modes, Min/Max volts, volt
demands and voltage harmonics represent line-to-neutral