GE 90-30 PLC Series Installation And Hardware Manual page 218

8
IC693PTM100/101 Power Transducer (PTM)
The PTM is used for measuring electrical power consumption or for monitoring voltages between
an electrical generator and its power grid. It connects to user-supplied current and potential
transformers, which furnish the input signals the PTM uses to calculate its data. Since one of the
PTM's components is a Series 90-30 PLC module, the PLC can use the data gathered by the PTM
for data reporting, fault monitoring, generator control, or demand charge reduction/load shedding
applications. The PTM consists of three parts, which are all included under one catalog number:
Difference Between PTM100 and PTM101
The only difference between the IC693PTM100 and IC693PTM101 is in the length of their
interface cables. The PTM100 comes with a 19" (0.5 meter) cable, and the PTM101 comes with a
39" (1 meter) cable.
Capabilities
A single PTM is capable of performing any one of the following tasks, as selected by the
appropriate %Q bit:
Operating Modes
The PTM can operate in either of the following two modes, which are selectable by a %Q bit in the
PLC application program:
8-40 Series 90-30 PLC Installation and Hardware Manual – August 2002
PTM Processing Module (PTMPM) - a module that mounts in a Series 90-30 Rack.
PTM Interface Module (PTMIM) - a panel-mounted circuit board. This board interfaces
between the PTMPM module and the input transformers (current and potential).
Interface cable - connects the PTMPM module to the PTMIM circuit board.
Measure power parameters for three individual single phase circuits.
Measure power parameters for one 3-wire single phase circuit (120/240 VAC).
Measure power parameters for one 3-phase circuit (selectable between Wye or Delta type).
Measure and compare power parameters between a 3-phase generator's output phases and one
power grid phase.
Measure and compare power parameters between one generator output phase and one power
grid phase.
Power Monitor Mode - In this mode, the PTM samples either Single Phase or 3-Phase AC
voltages and currents and uses the data to calculate numerous power values. For 3-Phase
operation, Wye or Delta, can be selected.
Synchro Monitor Mode - In this mode, the PTM samples a Single-Phase or 3-Phase AC
voltage produced by a generator, and one voltage from the associated power grid, then
develops voltage, frequency, and relative phase information.
GFK-0356Q