The
GPT 130 Heat–Trace Control is a single-point microprocessor-based heat-trace control
thermostat. It is ideal for applications which require Ground–Fault
Equipment Protection (GFEP). Ideal uses include freeze protection,
hot water temperature maintenance, grease line trace, and other
temperature monitoring and control applications.
The
GPT 130 Heat–Trace Control operates from the heater’s
power source. A universal power supply allows the GPT 130 to operate
from 100 V ac to 277 V ac, and control a resistive load up to 30 A.
The
temperature setpoint is adjustable from −99.9 °F to 999 °F
(−73.3 °C to 537.7 °C) to a tenth degree resolution.
The
GPT 130 comes with a 100K ohm thermistor temperature sensor with a 20
ft. jacketed cable. The included sensor has an operating range of−40°F to 230°F (−40°C to 110°C). The GPT 130
can also use 2–, 3–, or 4–wire RTD sensors for
systems requiring high–temperature sensing.
The
GPT 130 monitors temperature, load current, and ground leakage
current. Alarms include high temperature, low temperature, high load
current, low load current, ground fault, sensor fault, internal
fault, and power fail. These alarms are easy to adjust and observe
from the front panel. The GPT 130 can be set to energize or
de-energize the heaters during a sensor fault.
The
GPT 130 Heat–Trace Control includes integral GFEP. This
eliminates the extra expenses associated with having to provide
separate GFEP components in the circuit panel. The GPT 130 normally
disconnects power immediately when ground fault current exceeds the
set value. If it is set to Fire Protect mode, for critical fire
protection systems, then it will generate the alarm but power will be
maintained to prevent freezing.
To
ensure continued safe operation, the GPT 130 performs a self–test
of the GFEP circuit when power is first applied, along with a load
ground fault test, and this repeats periodically thereafter at an
adjustable interval.
