PTR-2C Pulse Transceiving Relay

The PTR-2C is intended to be located at the location of the receiving equipment –
usually a customer-owned energy management system. It acts primarily to compensate
for the resistance of the long wire run, as well as to protect the customer equipment
from large transients that could be coupled into long wire runs between it and the
electric meter. Transients which are coupled into the wire loop between the originating
pulse output and the receiving relay are contained within the loop and suppressed by
means of heavy duty transient suppression devices.

Each time the pulse output closes, the current loop sends sufficient current though the
wire loop so as to receive back the required current to activate the relay outputs. If the
resistance of the wire loop is high, the PTR-2C will automatically raise the wetting
voltage until the optimum current is received back. In this manner, wire length and size
in the current loop are not critical. Longer distances may be obtained with larger gauge
wire.

The PTR-2C has a built-in low voltage power supply and may be used with meters
having high or low voltage semiconductor outputs, or mechanical output contacts
(relays). Typical applications include interfaces between utility metering devices and
customer-owned energy control systems. A bright red LED lamp indicates the system’s
status at all times, thus allowing a rapid check of the system’s performance without
requiring any additional test equipment. The PTR-2C’s input and output circuit’s terminal
strip is a “EURO” type connector. When the stripped wire has been correctly installed in
the terminal “slot” there are no conductive parts exposed on the surface of the terminal
strip. Due to the inherent current-limited nature of the design, no fusing is necessary on
the input. No damage will result if the current loop is shorted to itself or to ground.

The PTR-2C has built-in MOV transient protection for the three solid-state relay outputs
as well as for the current loop, eliminating the need for external surge suppression. In
addition, each output has solid-state automatically-resetting fuses. All component parts
that have power applied to them, with the exception of the input/output terminal strip,
are enclosed in a polycarbonate cover for maximum protection. The mounting base
plate is also made of polycarbonate and offers excellent electrical insulation between
the circuit and the mounting surface. The PTR-2C is designed to mount in a suitable
electrical enclosure for the application.

All specifications are subject to change without notice.

PTR-2C Pulse Transceiving Relay Specification Sheet

PTR-2C Pulse Transceiving Relay Instructions