The Series 90-30 Power Transducer (PTM) is an intelligent system for
measuring electrical power consumption or for monitoring voltages
between an electrical generator and the electrical power grid. The PTM
module is not intended to provide a protective relay function or be used
for energy billing purposes.
The PTM connects to user-supplied current and potential transformers,
which furnish the input signals the PTM uses to calculate its data. The
Processing module, which mounts in a Series 90-30 PLC, transfers the
data it gathers to the PLC where it can be used for a wide variety of
purposes. The PTM can be used with a wye or delta type three-phase
power system or with a single-phase power system.
The PTM consists of three parts, which are all included under one
• Processing Module – a module that mounts in a Series 90-30
• Interface Board – a panel-mounted circuit board. This board
interfaces between the Processing module and the input
transformers (current and potential).
• Interface cable – connects the Processing module to the
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