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7

40752-195 (1)

 

Effective 

2

/201

1

3.  OPERATION

3.1  Manual Operation

Manual operation of the circuit breaker is controlled by the 

circuit breaker handle and the Push-to-Trip button.  The 

circuit breaker handle has three positions, two of which 

are shown on the cover raised lettering to indicate ON and 

OFF.  On the handle, ON, OFF, and TRIP are also shown 

by a color-coded strip for each circuit breaker handle posi-

tion:  red for ON, white for TRIP, and green for OFF (See 

Figure 3-1).  The Push-to-Trip button checks the circuit 

breaker tripping function and may be used to periodically 

exercise the operating mechanism.  

Figure 3-1  Circuit Breaker Manual Controls

16.000

OVER ALL LENGTH

8.625

14.750

 OF M

TG HOLES

3.819

1.375

2.490

2.750

4.125

7.000

2.799

8.250

9.250

11.500

OF

 TERMIALS

REMOVABLE
TERMINAL
COVER

4X Ø.344 MTG HOLES

Ø.703 CBORE X .453 DP

.359 DP FROM BOTTOM

HANDLE 

REMOVABLE
TERMINAL
COVER

3.2  Circuit Breaker Reset

After an automatic or accessory initiated trip, or a manual 

Push-to-Trip operation, the circuit breaker is reset by mov-

ing the circuit breaker handle to the extreme OFF position.

CAUTION 

LACK OF ILLUMINATION OF THE STATUS LIGHT DOES 

NOT INDICATE THE TERMINALS OF THE BREAKER 

ARE DEENERGIZED.

Содержание Allen-Bradley 140U

Страница 1: ...ac cordance with Underwriters Laboratories Inc Standard UL 489 and satisfy the requirements of the International Electrotechnical Commission Recommendations No IEC 60947 2 The Trip Units are AC only d...

Страница 2: ...r the cabling to cool off Short delay Instantaneous Trip For short circuit con ditions that exceed the short delay pick up settings the trip units initiate a trip after a delay prescribed by the I t r...

Страница 3: ...Shunt Trip Undervoltage Release Mechanism Handle Reset 40752 096 Note Shunt trip and undervoltage accessories if re quired must be mounted in the left pole Note Trip unit versions with ground fault pr...

Страница 4: ...h existing equipment ratings and system requirements Inspect the circuit breaker for completeness and check for damage before mounting 2 2 Accessory Installation Note If required internal accessory in...

Страница 5: ...it Breaker Escutcheon Dimensions CIRCUIT BREAKER COVER CONSTRAINTS MOVING PARTS DO NOT OPERATE THE BREAKER WITHOUT THE COVER INSTALLED CAUTION C Handle L 3 438 87 31 C L Breaker 2 50 R 6 35 R 1 718 43...

Страница 6: ...ground fault protection connect the neutral current sensor and ground fault alarm unit as HAZARDOUS VOLTAGE CONDITIONS CAN CAUSE DEATH OR SEVERE PERSONAL INJURY MAINTAIN ORIGINAL ELECTRICAL CLEARANCE...

Страница 7: ...s the circuit breaker tripping function and may be used to periodically exercise the operating mechanism Figure 3 1 Circuit Breaker Manual Controls 16 000 OVER ALL LENGTH 8 625 14 750 OF MTG HOLES 3 8...

Страница 8: ...me will be shorter 4 5 Isd Setting in multiples of IR For short circuit conditions that exceed the short delay pick up setting the trip unit initiates a trip after a predetermined delay 4 6 The Ig xIn...

Страница 9: ...he two lowest settings of the INST switch 2 5x and 4 0x For example a 1200A In NG breaker with the switch set to 2 5x would trip instantaneously when the current exceeded 3000A 4 13 The adjustable INS...

Страница 10: ...a period of 38 seconds If the current drops below the 95 value the contact will open The yellow and green wires that exit the right side of the breaker are the common C and nor mally NO of this relay...

Страница 11: ...es normal feed installation Neutral sensor is wired identi cally for reverse feed applications Figure 5 1 Neutral Sensor Outline Polarity Markings 2 188 55 58 2 75 69 85 M12 1 75 Tapped Holes 4 Places...

Страница 12: ...ARE SUITABLE FOR THE JOB 6 1 Remove dust dirt soil grease or moisture from the surface of the circuit breaker using a lint free dry cloth brush or vacuum cleaner Do not blow debris into the cir cuit...

Страница 13: ...neutral current passing current through the neutral sensor only will not properly test the ground fault feature 7 3 4 Using a low voltage 0 24V high current AC source apply a test current of 125 of th...

Страница 14: ...Test with a Four Wire System Figure 7 1c Connections for Ground Fault No Trip Test with a Three Wire System Source Low Voltage Source L C R N Load Current Limiting Resistor if required Source Low Volt...

Страница 15: ...15 40752 195 1 Effective 2 2011 NOTES...

Страница 16: ...over all contingencies should be consulted THERE ARE NO UNDERSTANDINGS AGREEMENTS WARRANTIES EXPRESSED OR IMPLIED INCLUDING WARRANTIES OF FITNESS FOR A PARTICULAR PUR POSE OR MECHANTABILITY OTHER THAN...

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