Submittal Sheet

ManualsBrandsResideo ManualsTransformersFoot Mounted 120 Vac Transformer with 9 in. Lead Wires and Plastic End Caps

Table Of Contents

PRODUCT DATA

68-0054-06

AT120A-E; AT140A-E; AT150A,B,D-F;

AT160B; AT175A-D,F Transformers

APPLICATION

These general purpose transformers provide power to 24 Vac

circuits. They are typically used in heating/cooling control

systems, but can be used in any application that doesn’t

exceed the load ratings.

FEATURES

• AT120 is rated at 20 VA.

• AT140 is rated at 40 VA.

• AT150 is rated at 50 VA.

• AT160 is rated at 60 VA.

• AT175 is rated at 75 VA.

• All models meet National Electrical Code Class 2 not wet,

Class 3 wet transformer requirements.

• All models conform to Underwriters Laboratories Inc.

Standard UL 1585.

• Color-coded leadwires for primary connections and screw

terminals for secondary connections, fixed 1/4 inch

(6 mm) male quick-connects or color-coded leadwires for

both primary and secondary, are standard.

• Models available with stripped leadwires, leadwires with

variety of terminals, or special terminations as required on

both primary and secondary.

• Mounting options include clamp mounting on outlet box

knockout, plate mounting, foot mounting, panel

mounting, conduit/panel and a combination.

• Models available for 120V, 240V, 277V, 480V, 120/240V,

208/240V, 277/480V, 120/208/240V, 208/240/480V, or

208/277/480V supply at 60 Hz.

• “F” models include a button for manually resetting the

circuit breaker.

M38595

Contents

Application .......................................................................... 1

Features .............................................................................. 1

Specifications ..................................................................... 2

Installation .......................................................................... 8

Checkout ............................................................................. 12

Summary of content (12 pages)

PAGE 1
AT120A-E; AT140A-E; AT150A,B,D-F; AT160B; AT175A-D,F Transformers PRODUCT DATA FEATURES • AT120 is rated at 20 VA. • AT140 is rated at 40 VA. • AT150 is rated at 50 VA. • AT160 is rated at 60 VA. • AT175 is rated at 75 VA. • All models meet National Electrical Code Class 2 not wet, Class 3 wet transformer requirements. • All models conform to Underwriters Laboratories Inc. Standard UL 1585.
PAGE 2
AT120A-E; AT140A-E; AT150A,B,D-F; AT160B; AT175A-D,F TRANSFORMERS SPECIFICATIONS Models: AT120A-E; AT140A-E; AT150A,B,D-F; AT160B; AT175A-D,F. IMPORTANT The specifications given in this publication do not include normal manufacturing tolerances. Therefore, a sample unit may not match the listed specifications exactly. Also, this product is built and tested under closely controlled conditions, and some minor differences in performance can be expected if those conditions are changed.
PAGE 3
AT120A-E; AT140A-E; AT150A,B,D-F; AT160B; AT175A-D,F TRANSFORMERS PLATE OR OUTLET BOX MOUNTED AT CLAMP ON END BELL PLATE MOUNTED AT THE LAMINATIONS 1 1 (27) 16 A MAX. B MAX. 3 (19) 4 FOOT MOUNTED C MAX. D 3 3 4 (44) 2 1 3 16 (81) 3 1 4 1 4 (57) 2 3 8 (60) 2 3 16 (5) 3 (10) 8 11 (22) 16 A Model AT120 AT140 120, 208/240V 120/208/240V AT150 AT175 in. 2-3/4 3 3 3 3-1/2 mm 70 76 76 76 89 B C D mm in. mm in. mm in.
PAGE 4
AT120A-E; AT140A-E; AT150A,B,D-F; AT160B; AT175A-D,F TRANSFORMERS 3/16 (5) A 4 G (MAX) D B 1 C F 3/8 (10) 2 3 E 1 "B" MODELS AVAILABLE WITH MOUNTING FEET; "E" MODELS ARE LESS MOUNTING FEET. 2 AVAILABLE WITH LEADWIRES OR FIXED 1/4 in. [6 mm] MALE QUICKCONNECTS. SCREW TERMINALS AVAILABLE ON SECONDARY. 3 MOUNTING HOLES STANDARD ON "E" MODELS ONLY. 4 1/4 in. (6 mm) ON AT175B. 1 1/16 (2) A B mm in. Model AT120 2-13/16 71 3-1/8 79 AT140 3-1/8 79 AT150 3-1/8 86 AT160 3-1/8 86 AT175 mm in.
PAGE 5
AT120A-E; AT140A-E; AT150A,B,D-F; AT160B; AT175A-D,F TRANSFORMERS "C" MODEL TRANSFORMER MOUNTED ON OUTLET BOX KNOCKOUT B D A C 1 TOP VIEW 7 (22) 8 1 1 (32) 4 7 (22) 8 SIDE VIEW "D" MODEL 3 7 1 (37) 16 3 (86) 8 1 (3) 8 1 4 (6) 3 8 (60) 2 2 3 3 8 (86) 3 16 (5) 5 (8) 16 1 3 (83) 4 B C mm mm in. in. mm in.
PAGE 6
AT120A-E; AT140A-E; AT150A,B,D-F; AT160B; AT175A-D,F TRANSFORMERS 7/16 (11) A A B mm in. 1-3/4 45 2-1/8 54 Model AT150F AT175F C mm mm in. in. 1-3/4 45 3-5/8 93 1-3/4 45 3-15/16 102 B 7/16 (11) 3-3/16 (81) 11/16 (17) 2-3/16 (56) C M12115A Fig. 5. “F” model transformer dimensions in in. (mm). AT140 REGULATION SECONDARY VOLTAGE (VOLTS) SECONDARY VOLTAGE (VOLTS) AT120 REGULATION 35 30 25 20 15 0 0.5 1.0 1.5 2.0 2.5 SECONDARY CURRENT (AMPS) 3.0 30 25 20 15 0 3.5 M12110A Fig. 6.
PAGE 7
AT120A-E; AT140A-E; AT150A,B,D-F; AT160B; AT175A-D,F TRANSFORMERS AT175 REGULATION SECONDARY VOLTAGE (VOLTS) SECONDARY VOLTAGE (VOLTS) AT150 REGULATION 35 30 25 20 15 0 0.5 1.0 1.5 2.0 2.5 SECONDARY CURRENT (AMPS) 3.0 3.5 35 30 25 20 15 0 M12112A Fig. 8. AT150 regulation curve. 0.5 1.0 1.5 2.0 2.5 SECONDARY CURRENT (AMPS) 3.0 3.5 M12114A Fig. 10. AT175 regulation curve. SECONDARY VOLTAGE (VOLTS) AT160 REGULATION 35 30 25 20 15 0 0.5 1.0 1.5 2.0 2.5 SECONDARY CURRENT (AMPS) 3.
PAGE 8
AT120A-E; AT140A-E; AT150A,B,D-F; AT160B; AT175A-D,F TRANSFORMERS INSTALLATION "A" MODELS When Installing this Product… 1. 2. 3. 4. USE SCREWS OR BOLTS THROUGH SLOTS (4) IN MOUNTING FEET Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application. Installer must be a trained, experienced service technician.
PAGE 9
AT120A-E; AT140A-E; AT150A,B,D-F; AT160B; AT175A-D,F TRANSFORMERS PLATE MOUNTED AT CLAMP ON PRIMARY END BELL MOUNTING PLATE SCREW TERMINALS FOR SECONDARY CONNECTIONS END BELL LEADWIRES FOR PRIMARY CONNECTIONS CLAMP SCREW AND CLAMP M12126A Fig. 13. When screw is tightened, clamp holds plate on transformer.
PAGE 10
AT120A-E; AT140A-E; AT150A,B,D-F; AT160B; AT175A-D,F TRANSFORMERS TRANSFORMER PLATE WITH RAISED PORTION OF KNOCKOUTS FACING YOU: 1. PRY UP TOP SECTION OF LARGE KNOCKOUT BY INSERTING SCREWDRIVER FIRST AT ONE SIDE OF SLOT AND THEN AT THE OTHER SIDE. T AN R RT ME PO IM UNT OR F E MOANS SID TR HER OT M9163A 2. THEN PRY UP BOTTOM SECTION OF KNOCKOUT. Fig. 15. Secure plate on transformer with mounting screw and tab.
PAGE 11
AT120A-E; AT140A-E; AT150A,B,D-F; AT160B; AT175A-D,F TRANSFORMERS SINGLE VOLTAGE MODELS 2 COMMON BLACK PRIMARY 3 VOLTAGE VARIES WITH MODEL 1 SECONDARY 1 SECONDARY 1 SECONDARY 1 SECONDARY 120V - WHITE 208V - RED 240V - ORANGE 277V - BROWN 480V - BLACK/RED 208/240 VAC MODELS 2 COMMON M12127A BLACK 208V Fig. 16. Mounting “E” model transformer in a panel cutout. PRIMARY 240V 3 Conduit/Panel Mounting ORANGE Mount the transformer on a plate or panel (not included) with a 7/8 in. knockout.
PAGE 12
AT120A-E; AT140A-E; AT150A,B,D-F; AT160B; AT175A-D,F TRANSFORMERS CHECKOUT CAUTION Do not short transformer secondary terminals. Overload current protection inherent on AT120, AT140, and AT150. 3.5 Amp fuse available on AT160B and AT175A-D. Voltage Check After installation is complete, turn on power supply and perform a voltage check. 1. Place the controlled equipment in operation and observe through one complete cycle. 2. Using a voltmeter, verify proper primary and secondary voltages. 3.