background image

69-0251—2

2

PLATE MOUNTING
Mounting Plate to Transformer

Mount the plate to the transformer in either of two

positions (see Fig. 2):

a. at the clamp on the primary end bell, or
b. at the laminations.

Fig. 2—Plate may be mounted to transformer
in either of two position.

To mount the plate at the primary end bell:

1. Turn the screw on the clamp almost all the way out.
2. Hold the mounting plate with the keyhole slots up

and the raised portion of large center knockout away from
you.

3. From the back, thread the primary leadwires through

the round center hole in the plate.

4. Fit the clamp and screw through the round hole.
5. While holding the plate in place, tighten the setscrew

securely against the rim of the hole. See Fig. 3. Avoid
damaging the leadwires with the screwdriver.

Fig. 3—When screw is tightened, clamp holds
plate on transformer.

PLATE MOUNTED AT CLAMP ON  PRIMARY END BELL

MOUNTING 
PLATE

MOUNTING PLATE

PLATE MOUNTED AT THE LAMINATIONS

M9162

END
BELL

CLAMP SCREW 
AND CLAMP

RAISED PORTION OF 
LARGE CENTER KNOCKOUT

LEADWIRES 
FOR PRIMARY 
CONNECTIONS

LEADWIRES 
FOR PRIMARY 
CONNECTIONS

MOUNTING
 SCREW

SCREW 
TERMINALS FOR
SECONDARY
CONNECTIONS

SCREW 
TERMINALS FOR
SECONDARY
CONNECTIONS

MOUNTING FEET ON "A" MODELS ONLY.

1

1

1

Summary of Contents for AT120A, AT140A, AT150A, AT175A

Page 1: ...inals 50 VA AT175A 120 208 240 9 in leads 27 5 24 0 Screw terminals 75 VA Installation WHEN INSTALLING THIS PRODUCT 1 Read these instructions carefully Failure to follow them could damage the product or cause a hazardous condition 2 Check the ratings given in the instructions and on the product to make sure the product is suitable for your application 3 Installermustbeatrained experiencedservicete...

Page 2: ... leadwires through the round center hole in the plate 4 Fit the clamp and screw through the round hole 5 While holding the plate in place tighten the setscrew securely against the rim of the hole See Fig 3 Avoid damaging the leadwires with the screwdriver Fig 3 When screw is tightened clamp holds plate on transformer PLATE MOUNTED AT CLAMP ON PRIMARY END BELL MOUNTING PLATE MOUNTING PLATE PLATE MO...

Page 3: ...pment damage 1 Make primary connections to the line voltage power supply On multitap models be sure to use correct leads for available power supply See Fig 6 2 On multitap models insulate the ends of the unused leads using wire nuts or capping with a solderless connec tor 3 Make secondary connections to 24 Vac control cir cuit To mount the plate at the laminations 1 Removethelargerectangularknocko...

Page 4: ...easure voltage again If proper primary voltage is measured and sec ondary voltage is significantly less than the volt age shown on the regulation curves transformer winding is damaged Replace transformer and repeat checkout procedures If primary voltage is 0V assure power supply is connected properly or repair if necessary Repeat checkout procedures 5 Do not put system into operation unless correc...

Reviews: