The Chromalox WTP series freeze protection
heat trace panels offer power-distribution,
ground-fault protection, individual circuit alarming
and ambient sensing control.
The panels are housed in NEMA 4 enclosures
for indoor/outdoor applications. NEMA 4X 304
stainless steel enclosures may be selected as an
option for more harsh environments.
100 and 225 amp bus ratings in Single and
Three-Phase configurations. Branch circuit
breakers are available in 20, 25, 30 and 40 amp
single-pole and two-pole configurations with
30mA ground-fault equipment protection.
WTP – Freeze Protection Ambient Sensing Series
The WTP series controls multiple heat trace circuits
via an ambient sensing external thermostat,
external electronic controller or via an external
snow sensors. Chromalox recommended controllers
include: ChromaMelt-2R, RTAS, RTASEP,
B100, E100 or the EUR-5A. The WTP may be
operated in two modes; automatically with the
external controller, or in manual override via the
Hand/Off/Auto selector switch.
WTPM – Freeze Protection Ambient Sensing Monitor Series
The WTPM WeatherTrace with the HMI Monitoring,
continually monitors the supply voltage to each
individual heat trace circuit. Loss of voltage or a
ground fault condition will trigger an automatic
alarm condition, alerting plant personnel of critical
process problems and reducing downtime. An
annunciator panel then identifies the faulted
zone and a Common Alarm is activated with the
The WTPM panels provide group control of multiple
heat trace circuits for pipe freeze protection
via an ambient sensing thermostat, electronic
controller or door mounted HMI. The WTPM can
also be configured for group control of snow
melting or deicing applications using our internal
temperature/moisture controller. Chromalox recommended
controllers include: ChromaMelt-2R,
RTAS, RTBC, or TPR with HMI.
The WTPM may be operated in two modes; automatically
with the external controller or in manual
override via the Hand/Off/Auto selector switch.