installation and operation Manual

ManualsBrandsRockwell Automation ManualsEquipment140U Q, M frame CB Electronic RMS Trip Unit

Q and M-Frame Circuit Breakers

Instruction Leaflet for Electronic RMS Trip Unit Installation and Operation

Table

Contents

Description Page

General Information

...............................................

1.1

Protection

..............................................................

2.0

UL Listed Devices

..................................................

3.0

Installation

.............................................................

3.1

Preparation (All Trip Units)

.....................................

3.2

Pole Trip Unit Installation

.....................................

3.3

Ground Fault Trip Unit Installation

..........................

3.3.1

General

..................................................................

3.3.2

Installation

.............................................................

3.4

3.5

4.0

4.1

4.2

4.3

4.4

5.0

5.1

5.2

5.3

5.4

5.5

5.6

6.0

6.1

6.2

Pole (Non

Ground Fault) Trip Unit Installation

.....

Final Installation Instructions (All Trip Units)

...........

Principle of Operation

............................................

General

..................................................................

Overload Trip

.........................................................

Short Delay/lnstantaneous Trip

..............................

Ground Fault Protection

.........................................

Protection Settings

.................................................

General

..................................................................

Short Delay Pick

up Settings

.................................

Short Delay Time Settings

.....................................

Instantaneous Pickup Setting

................................

Ground Fault Pick

up Setting

.................................

Ground Fault Time Settings

...................................

Testing

...................................................................

Functional Field Testing

.........................................

Performance Testing for Ground Fault Trip Units

....

6.2.1

Code Requirements

...............................................

6.2.2

Standards Requirements

.......................................

6.2.3

General Test Instructions

.......................................

7.0

Rating Plug

..........................................................

8.0

References

..........................................................

8.1

Frame Molded Case

Circuit Breakers

...................................................

8.2

Internal Accessories

............................................

PRESENT BEFORE PROCEEDING

AND ALWAYS FOLLOW GENERALLY ACCEPTED

SAFETY PROCEDURES.

MISAPPLICATION

OR MISINSTALLATION

OF ITS

PRODUCTS.

ALLEN

-BRADLEY

NOT LIABLE FOR THE

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 instructions.

Fig.

Electronic RMS Trip Unit

for

Pole Q

Frame &

M Frame Circuit Breaker

GENERAL INFORMATION

WARNING

DEATH, SEVERE PERSONAL INJURY,

SUBSTANTIAL PROPERTY DAMAGE CAN RESULT

FROM CONTACT WITH ENERGIZED EQUIPMENT. DO

NOT

AlTEMPTTO INSTALL

PERFORM

MAINTENANCE ON EQUIPMENT WHILE IT

ENERGIZED. ALWAYS VERIFY THAT NO VOLTAGE

1.1

Protection

The Electronic RMS

illustrated in Figure

is an elec

tronic trip unit that incorporates a microprocessor

based

custom application specific integrated circuit design for

use with Q

Frame and M Frame Molded Case

Circuit Breakers.

The Electronic RMS Trip Unit

provides true RMS current

sensing for proper correlation with thermal characteristics of

conductors and equipment. Interchangeable rating plugs

40752-072(2) Effective

6/02

Bul. 140U

Summary of content (14 pages)

PAGE 1
Bul. 140U Q and M-Frame Circuit Breakers Instruction Leaflet for Electronic RMS Trip Unit Installation and Operation Table of Contents Description Page 1.O General Information ............................................... 1 1 1.1 Protection .............................................................. 2 2.0 UL Listed Devices .................................................. 2 3.0 Installation ............................................................. 2 3.1 Preparation (All Trip Units) .............
PAGE 2
Page 2 are provided to establish the continuous current rating of each circuit breaker. The Electronic RMS Trip Unit is completely self-contained and when the circuit breaker is closed, requires no external power to operate its protection systems. It operates from current signal levels and control power derived through current sensors integrally mounted in the trip unit. Electronic RMS Trip Units are suitable for 50/60 Hz AC applications only.
PAGE 3
Page 3 3.3 Ground FaultTrip Unit Installation 3.3.1 General -Contact Base -Load Copper Fig. 3 Electronic RMS Ground Fault Trip Units detect ground fault currents through Residual Sensing.They are not designed to use source ground or zero sequence ground fault sensing methods. If the system neutral is grounded, but no phase to neutral loads are used, the neutral current sensor is not necessary. In that case, the white and grey leads on the trip unit should be cut off before installation.
PAGE 4
Page 4 Fig. 5 SOURCE - COVER SCREWS TORQUE 20-22 9 9 LOAD .Aux~Iiary switch shown m the "Breaker Canlacis Open'' p m i l m n Fig. 6 40752-072(2) Effective 6/02 Fig.
PAGE 5
Page 5 Position trip unit in base. Make sure latch bracket pin is properly seated in slots in side plates (see Fig. 8). If necessary, move latch toward load end of circuit breaker to seat trip unit. Screw in and tighten three trip unit retaining screws (centerfirst).Torque to 12 Ib-ft (16.27 N.m) (see Fig. 8). A A CAUTION DO NOT EXCEED A TORQUE OF 12 LB-FT (16.27 n.m.) EXCESSIVE TORQUING WILL SHEAR SCREWS. Lefl Contact Base Fig.
PAGE 6
Page 6 For an M-Frame, also screw in and torque the load end screws to 6-8 Ib-ft. (8.14-10.85 N.m.) 3.5 Final Installation Instructions (All Trip Units) Install accessory(ies), if required, using the appropriate instruction leaflet listed in Section 8.2. Where accessories are not required, install protective barriers supplied with the trip unit in accessory retaining slots in left- and righthand poles of trip unit and in fourth pole current sensor if applicable.
PAGE 7
Page 7 For ambient conditions above 40°C and where the maximum ampere rating plug has been installed, derating of the circuit breaker frame should be considered to avoid exceeding a safe terminal temperature operating range. Consult Allen-Bradley for recommendations. 4.1 General The Electronic RMS Trip Unit provides a tripping signal to the flux transfer shunt trip when current and time delay settings are exceeded.
PAGE 8
Page 8 6.OTESTING 6.1 Functional FieldTesting 5.6 Ground FaultTime Settings The ground fault time delay is a flat response with four settings (I, .15, .3, .5second) available (Figure 12-3).The I setting gives a trip response with no intentional delay (Instantaneous).This option is available on Catalog Nos. LSG and LSIG. A test receptacle is built into each trip unit to allow use of the STK2 Test Kit. The Test Kit performs a test of the Long Delay, Short Delay and Ground Fault functions. 6.
PAGE 9
Page 9 & ! ( \ 0 0 3 I 8 ’*+ I i Rating Plug Setting (Amperes) .- + L 2x-Ex 2x-8x 2 x . 8 ~2x-Ex t See Fig. 2-7 and Fig. 2-8for Continuation of Short Time Instantaneous Portions of Curves L Time Ms Current Current Fig. 12-3 Ground Fault Trip Current, and Ground Fault Trip TimeAdjustments and Curve Details provided with the equipment. A written record of this test shall be made and shall be available to the authority having inspection jurisdiction. 6.2.
PAGE 10
Page 10 69 voltage Source Source 1 Load i Nl Current-Lim iring Resisto! (if required1 Fig. 14-1 Connections for Ground Fault Trip Test Load Fig. 14-2 Connections for Ground Fault No-Trip Test, with a Four- Wire System Voltage Source Fig. 15 Current Limiting Resistor (if required) Fig.
PAGE 11
Page 11 GROUND FAULT TEST RECORD FORM Ground Fault Test Record should be Retained by Those in Charge of the Building's Electrical Installation in order to be available to the Authority having Jurisdiction. Test Date Fig.
PAGE 12
Page 12 If the system is a 4-wire system with a neutral current sensor, apply the same current as described above through one phase of the breaker, returning through the neutral sensor, as shown in Fig. 14-2.The breaker should not trip, and the alarm indicator, if supplied, should not operate. Repeat the test on the other two phases.
PAGE 13
Page 13 Trip Unit Functions Table 1-1.
PAGE 14
Page 14 Table 1-2. Electronic RMS Trip Unit Function and Rating Settings Trio Function RatinalSettina Descriotion Ampere Rating Fixed at 100% Fixed rating plugs available Trip Unit Amoere Ratina Fixed Rating Plugs 600A 630A 800A 300A, 350A, 400A, 500A, 600A (I,) 300A, 315AO, 350A, 400A, 500A, 600A, 630AO (I,) 400A. 500A. 600A. 700A.