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13

40752-195 (1)

 

Effective 2/2011

The test shall be conducted in accordance with ap-

proved instructions provided with the equipment.  A 

written record of this test shall be made and shall be 

available to the authority having inspection jurisdic-

tion.

7.2  UL Standards Requirements

As a follow-up to the basic performance requirements 

stipulated by the N.E.C. as stated above in 7.1, UL Standard 

No. 1053 requires that certain minimum instructions must 

accompany each ground fault protection system.  These 

following statements plus a copy of the test record form 

breaker.

7.3  General Test Instructions

7.3.1  The interconnected system shall be evaluated in ac-

cordance with the equipment assembler’s detail instruction 

7.3.2  The polarity of the neutral sensor connection (if used) 

must agree with equipment assembler’s detailed instruc-

tions to avoid improper operations following apparently 

correct simulated test operations.  Where a question exists, 

consult the specifying engineer and/or equipment assem-

bler.

7.3.3  The grounding points of the system shall be veri-

bypass the sensors.  High-Voltage testers and resistance 
bridges may be used.

THERE IS A HAZARD OF ELECTRICAL SHOCK OR 

BURN WHENEVER WORKING IN OR AROUND ELEC-

TRICAL EQUIPMENT.  ALWAYS TURN OFF POWER 

SUPPLYING BREAKER BEFORE CONDUCTING TESTS.

Note:  Since the ground fault circuit breakers derive 

their operating power from the phase current, and not 

from the 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 the ground fault pick-up set-

ting through one phase of the circuit breaker, as shown in

Figure 7-1a.  This should cause the breaker to trip in less 

than 1 second, and if an alarm indicatior is supplied, it 

should operate.  Reset the breaker and the alarm indicator.  

Repeat the test on the other two phases.

7.3.5  If the system is a 4-wire system with a neutral current 

sensor, apply the same current as described in paragraph 

7.3.4 above through one phase of the breaker, returning 

through the neutral sensor, as shown in Figure 7-1b.  The 

breaker should not trip and the alarm indicator, if sup-

plied, should not operate.  Repeat the test on the other two 

phases.

7.3.6  If the system is a 3-wire system with no neutral cur-

rent sensor, apply the same current as described in para-

graph 7.3.4 above through any two phases of the breaker, 

with the connections exactly shown in Figure 7-1c.  the 

breaker should not trip, and the alarm indicator, if supplied, 

should not operate.

Repeat the test using the other two combinations of break-

er phases.

CAUTION 

FIELD TESTING SHOULD BE USED FOR FUNCTIONAL 

TESTING AND NOT FIELD CALIBRATION.

ANY TEMPORARY CONNECTION MADE FOR THE 

PURPOSE OF CONDUCTING TESTS SHOULD BE 

RESTORED TO PROPER OPERATING CONDITIONS 

BEFORE RETURNING THE BREAKER TO SERVICE.

7.3.7  The results of the test are to be recorded on the test 

form provided with the equipment.

are shipped with each N-Frame ground fault circuit

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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