Rockwell-automation 140U N-Frame Circuti Breakers Instruction Leaflet Manual de usuario descargar pdf (Pagina 1)

40752-093(1) Effective 5/02

DO NOT ATTEMPT TO INSTALL OR PERFORM MAIN-

TENANCE ON EQUIPMENT WHILE ENERGIZED.

DEATH, SEVERE PERSONAL INJURY, OR SUBSTAN-

TIAL PROPERTY DAMAGE CAN RESULT FROM CON-

TACT WITH ENERGIZED EQUIPMENT. ALWAYS

VERIFY THAT NO VOLTAGE IS PRESENT BEFORE

PROCEEDING WITH THE TASK, AND ALWAYS FOL-

LOW GENERALLY ACCEPTED SAFETY PROCE-

DURES.

ALLEN-BRADLEY IS NOT LIABLE FOR THE MISAP-

PLICATION OR MISINSTALLATION OF ITS PROD-

UCTS.

The user is cautioned to observe all recommendations,

warnings, and cautions relating to the safety of personnel

and equipment as well as all general and local health and

safety laws, codes, and procedures.

The recommendations and information contained herein

are based on Allen-Bradley experience and judgement,

but should not be considered to be all-inclusive or cover-

ing every application or circumstance which may arise. If

any questions arise, contact Allen-Bradley for further

information or instruction.

1. INTRODUCTION

The N-frame circuit breaker (Fig. 1-1), is a

600 VAC maximum rated device, with an integral

trip unit and interchangeable Rating Plug. Two

continuous current ratings are available 400-800

Amp and 600-1200 Amp. Refer to table 1-1 for available

trip units and table 1-2 for available rating plugs.

Fig. 1-1 N-frame Circuit Breaker

The N-Frame Trip Units are AC only devices that

employ microprocessor based technology that provides

true RMS current sensing means for proper correlation

with thermal characteristics of conductors and equip-

ment. The primary function of the Trip Unit is circuit pro-

tection. This is achieved by analyzing the secondary

current signals received from the circuit breaker current

sensors and initiating trip signals to the circuit breaker

shunt trip when pre-set current levels and time delay set-

tings are exceeded. Low level ground fault protection with

an adjustable time delay is supplied when appropriate trip

types are selected.

In open air at 40°C, an N-frame circuit breaker unit will

carry continuously up to 1200 amperes without

exceeding a 50°C rise at the terminals.

The calibration of the trip unit is insensitive to ambient

temperatures over a range of -20° to +55°C. However, the

trip unit contains thermal temperature protective circuitry

that initiates a trip operation for self-protection if the inter-

nal ambient temperature at the printed circuit board

(PCB) reaches approximately 90°C. For ambient condi-

tions above 40°C, derating of the circuit breaker should

be considered to avoid exceeding a safe terminal temper-

WARNING

N-Frame Circuti Breakers

Instruction Leaflet for N-Frame Circuit Breakers

Bul. 140U

1 2 3 4 5 6 ... 15 16

Indice de contenidos

Pagina 1 - N-Frame Circuti Breakers

40752-093(1) Effective 5/02DO NOT ATTEMPT TO INSTALL OR PERFORM MAIN-TENANCE ON EQUIPMENT WHILE ENERGIZED. DEATH, SEVERE PERSONAL INJURY, OR SUBSTAN-T

Pagina 2

Page 10Fig. 4-3 Short Delay Trip Current and Short Delay Trip Time Adjustment and Curve Details for H Type Trip UnitFig. 4-4 Ground Fault Trip Unit C

Pagina 3

Page 11Fig. 5-2 Connection Diagrams Ground Fault Breaker - Figure indicates normal feed installation. Neutral sensor is wired identically for reverse

Pagina 4

Page 12SOME COMMERCIAL CLEANING AGENTS WILL DAMAGE THE NAMEPLATES OR MOLDED PARTS. MAKE SURE THAT CLEANING AGENTS OR SOL-VENTS USED TO CLEAN THE CIRCU

Pagina 5

40752-093(1) Effective 5/02Page 137.3.4 Using a low voltage (0-24V), high current, AC source, apply a test current of 125% of the ground fault pick-up

Pagina 6

40752-093(1) Effective 5/02Page 14Fig. 7-2 Typical Performance Test RecordGROUND FAULT TEST RECORD FORMGround Fault Test Record should be Retained by

Pagina 7

40752-093(1) Effective 5/02Page 15NOTES

Pagina 8

Page 1640752-093(1) Effective 5/02Printed in U.S.A./TQC

Pagina 9

Page 2ature operating range. Consult Allen-Bradley for recom-mendations.Molded Case Switches: The Molded Case Switch is similar to the Circuit Breaker

Pagina 10 - 40752-093(1) Effective 5/02

Page 3➀ Not UL listed➁ Occurs with short delay time adjustment set at I.➂ The Molded Case Switch has a fixed non-interchangeable rating plugGround Fau

Pagina 11

Page 4This instruction leaflet gives procedures for installation and field testing of N-frame circuit breakers and describes the different trip unit c

Pagina 12

Page 5Fig. 2-1 Terminal InstallationFig. 2-2 Conductor Extensions and Terminal Installation for 100% RatingFor bus connections use:.500-13 bolts (Engl

Pagina 13

Page 6Fig. 2-3 Breaker Mounting Bolt Drilling PlanFig. 2-4 Circuit Breaker Escutcheon DimensionFig. 2-5 Securement of Cable (See caution note for brac

Pagina 14 - 40752-093(1)

Page 7Wrap conductor cables with 3/8” nylon or equivalent rope as shown in Fig. 2-5, having a minimum tensile strength of 2000 Ibs, at 6” from termina

Pagina 15

Page 8Fig. 3-1 Circuit Breaker Manual Controls3.2 Circuit Breaker ResetAfter an automatic or accessory initiated trip, or a manual push-to-trip operat

Pagina 16

40752-093(1) Effective 5/02Page 94.6 Ground Fault Pick-up SettingSix settings marked 1x through 6x IG (where IG = 200 Amps) are available (see Fig. 4-

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