Chromalox Big Red Book

Controls

Specifications Power Source

120/240 VAC Single Phase 120/208 VAC Three-Phase 4-Wire 277/480 VAC Three-Phase 4-Wire

Freeze Protection Heat Trace Panels (cont’d.)

-32˚F to 122˚F (With Enclosure Heater)

Ambient Operating Temperature

14 - 18 AWG (15 - 30 Amp C.B), 8 - 4 AWG (40 Amp C.B)

Field Wire Size

30mA Ground Fault Equipment Protection

Ground Fault Breaker Type

NEMA 4 or NEMA 4X 304 Stainles Steel (option)

Enclosure

100 Amp and 225 Amp

Main Bus Size

100 Amp Two-Pole Main Disconnect Switch with through Door Rotary Handle 250 Amp Three-Pole Main Disconnect Switch with through Door Rotary Handle Type Z Purge Pressurization System for Class 1 Division 2 Area

Main Breaker Size

Pressurization System

UL and cUL

Approvals

L1

N

L2 L3

OFF

CONTACTOR COIL

THREE-POLE MAIN CIRCUIT BREAKER THREE-POLE MAIN CONTACTOR

C NC

PANEL ENERGIZED EXTERNAL CONTROLLER/ THERMOSTAT

CONNECTION POWER

END SEAL

ONE-POLE WITH 30mA GROUND FAULT TRIP (120/277 Vac)

Ambient Sensing Three Phase 208/120 4-Wire or 480/277 4-Wire

FREEZE- PROTECTION CIRCUIT

(208/480 Vac) GROUND FAULT TRIP TWO-POLE WITH 30mA

HEATING CABLE

FREEZE- PROTECTION CIRCUIT

EXTERNAL CONTROLLER/THERMOSTAT SOLD SEPARATELY *

N

L1 L2

THREE-POLE MAIN CIRCUIT BREAKER

CONNECTION POWER

THERMOSTAT *LINE-SENSING

END SEAL

ONE-POLE WITH 30mA GROUND FAULT TRIP

Line Sensing Single Phase 240/120

C NC

(120/277 Vac)

PROTECTION FREEZE- CIRCUIT

*LINE-SENSING THERMOSTAT

TWO-POLE WITH 30mA (208/480 Vac) GROUND FAULT TRIP

NC C

FREEZE- PROTECTION CIRCUIT

*EXTERNAL CONTROLLER/THERMOSTAT SOLD SEPARATELY

H-162