Rockwell Automation 140U Q User Manual

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Q and M-Frame Circuit Breakers

Instruction Leaflet for Electronic RMS Trip Unit Installation and Operation

Table

Contents

Description Page

General Information Protection

1.1

UL Listed Devices

2.0

Installation

3.0

Preparation (All Trip Units)

3.1

4-Pole Trip Unit Installation

3.2

Ground Fault Trip Unit Installation

3.3

General

3.3.1

Installation

3.3.2

3-Pole (Non-Ground Fault) Trip Unit Installation

3.4

Final Installation Instructions (All Trip Units)

3.5

Principle of Operation

4.0

General

4.1

Overload Trip

4.2

Short Delay/lnstantaneous Trip

4.3

Ground Fault Protection

4.4

Protection Settings

5.0

General

5.1

Short Delay Pick-up Settings

5.2

Short Delay Time Settings

5.3

Instantaneous Pickup Setting

5.4

Ground Fault Pick-up Setting

5.5

Ground Fault Time Settings

5.6

Testing

6.0

Functional Field Testing

6.1

Performance Testing for Ground Fault Trip Units

6.2

6.2.1

Code Requirements Standards Requirements

6.2.2

6.2.3

General Test Instructions

7.0

Rating Plug References

8.0

Q-Frame Molded Case

8.1

Circuit Breakers Internal Accessories

8.2

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12 12

Bul. 140U

PRESENT BEFORE PROCEEDING AND ALWAYS FOLLOW GENERALLY ACCEPTED SAFETY PROCEDURES.

ALLEN

MISAPPLICATION

PRODUCTS.

2 2

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

but should not be considered to be all

ing every application or circumstance which may arise. If

any questions arise, contact Allen-Bradley for further

information or instructions.

7 7 7 7 7 7 7 7

8 8 8 8 8 9 9

Fig.

-BRADLEY

Electronic RMS Trip Unit M Frame Circuit Breaker

GENERAL INFORMATION

NOT LIABLE FOR THE

OR MISINSTALLATION

-Bradley experience and judgement,

for

OF ITS

inclusive or cover

3-Pole Q-Frame &

DEATH, SEVERE PERSONAL INJURY,

SUBSTANTIAL PROPERTY DAMAGE CAN RESULT

FROM CONTACT WITH ENERGIZED EQUIPMENT. DO NOT

AlTEMPTTO INSTALL

MAINTENANCE ON EQUIPMENT WHILE IT ENERGIZED. ALWAYS VERIFY THAT NO VOLTAGE

40752-072(2) Effective

WARNING

6/02

PERFORM

1.1

Protection

The Electronic RMS, illustrated in Figure tronic trip unit that incorporates a microprocessor-based custom application specific integrated circuit design for

use with Q

Circuit Breakers. The Electronic RMS Trip Unit

sensing for proper correlation with thermal characteristics of conductors and equipment. Interchangeable rating plugs

Frame and M Frame Molded Case

provides true RMS current

is an elec

Page

are provided to establish the continuous current rating of each circuit breaker.

The Electronic RMS Trip Unit is completely self tained 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 applications only. For DC applications, a thermal trip unit should be used.

The Electronic RMS Trip Unit is available in 4 different types, (see Table 1 delay time function (adjusted by changing the rating plug), and may be equipped with a maximum of two phase and two ground (time application requirements. The types of adjustments available for each model include the following:

Adjustment

Short Delay Pick-up

2) Short Delay Pick-up/Short DelayTime

Short Delay Pick-Up/Ground Fault

Pick-up/Ground Fault Time

2.0 UL LISTED DEVICES

The Electronic RMS Trip Unit is listed in accordance with Underwriters Laboratories, Inc. Standard UL489 and satisfies the applicable requirements of the International Electrotechnical Commission (IEC) recommendations for molded case circuit breakers.

Fig.

RMS Trip Units are suitable for 50/60

1). Each trip unit contains a fixed long

current) adjustments to meet specific

Retaining Screw

KPlaces)\

\Trip Unit

Preliminary Alignment Sensor

LSI

LSG

Current

Sensor

Trip Unit and Current

Retaining

Screw

Secondary Winding Connector

con

magnetic

INSTAL LATlO N

3.1 Preparation

The installation procedure consists of inspecting and installing the trip unit and rating plug. To install the trip unit, perform the following steps.

Note: If required, internal accessory installation should be done before the circuit breaker is mounted and connected. Refer to individual accessory instruc tion leaflets.

Make sure that the trip unit is suitable for the intended installation by comparing nameplate data with any existing equipment and system requirements. Inspect the trip unit for completeness, and check for damage before installing it in the circuit breaker frame.

Note:Trip unit center retaining screw is captive in the

trip unit conductor; the remaining retaining screws are supplied with the frame.

Remove circuit breaker pan To continue installation, proceed to the section applicable

to the trip unit being installed:

UnitTvpe Section

Trip

pole Type Trip Unit 3.2

pole Ground Fault Trip Unit

pole Non-Ground Fault Trip Unit

4-PoleTrip Unit Installation

3.2

Remove the three screws for the left fourth pole contact bases (Fig. 3) from the hardware bag.

Place the trip unit and fourth pole current sensor side by side on a flat surface. (See Fig. 2)

Remove the CAUTION tag from the current sensor secondary winding leads.

Note: Secondary winding connector is not polarized.

Plug the current sensor secondary winding connector into the receptacle in the side of the trip unit. Either polarity is acceptable.

Note:The two trip unit outer retaining screws and

fourth pole sensor retaining screw may be placed in the trip unit conductor holes at this time. If preferred, the 5/16 inch hexagonal position the screws when the trip unit is in the base.

Position trip unit and fourth pole current sensor in base. Make sure latch bracket pin is properly seated in slots in side plates (see Fig. 4). If necessary, push circuit breaker handle towards the closed position to help seat trip unit.

(AllTrip Units)

head cover screws, and cover.

head wrench may be used to

3.3

3.4

and right-pole and

40752-072(2) Effective 6/02

Page

Contact

Base

Load

Copper

Fig.

Contact Bases and Load Copper

LINE

END

Side Plate

Trigger

Trip

Unit and Current Sensor

Retaining Screws

Fourth

Pnh

. -.

Current Sensor

Fig.

Unit

Trip Unit Installed in Circuit Breaker

END

LOAD

CAUTION

DO NOT EXCEED A TORQUE OF 12 LB-FT (16.27 N.M). EXCESSIVE TORQUING WILL SHEAR SCREWS.

FAILURE TO APPLY THE REQUIRED TORQUE

MAY LEAD TO EXCESSIVE HEATING AND CAUSE NUISANCE TRIPPING

OFTHE CIRCUIT BREAKER.

Screw in and tighten three trip unit retaining screws

(center first) and the screw for the fourth pole current

sensor.Torque to 12 Ib-ft (16.27 N.m) (see Fig. 4).

Finish installation of the 4

pole Trip Unit by following the

instructions in Section 3.5.

3.3 Ground

FaultTrip Unit Installation

3.3.1 General Ground fault trip units are supplied from the factory with a

wire harness with pigtail lead connections for a neutral current sensor (white and grey wires) and a ground fault alarm relay (yellow and green wires). A neutral current sensor is provided with each trip unit, and the ground fault alarm relay is ordered and shipped separately if required.

If the alarm relay is not required, the green and yellow leads should be cut off before the trip unit is installed in

the breaker.

Electroni

c 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. If the system neutral is grounded and phase to neutral

loads are used, then the neutral current sensor (see Fig.

must be used. It should be connected to the breaker

according to the diagram in Fig. 6. It has the same turns

ratio as the phase current sensors in the trip unit.

Note: The polarity of the sensor connections is

critical. Always observe the polarity markings on the

installation drawings. The polarity markings are identified as white dots on the

transformer.To insure

correct ground fault equipment performance, conduct field tests to comply with National Electric Code requirements under article

230-95(C). See Section 6.2

for testing instructions.

The optional “Internal Accessories” listed in Section 8.2 are available for installation in a Electronic RMS

Fault Trip

Unit.These items, if required, must be ordered

Ground

separately.

3.3.2 Installation

Plug the wire harness supplied for the neutral current sensor and ground fault alarm relay (white, grey, yellow and green wires) into the connector located in the right pole of the trip unit. With the correct polarity the harness should snap into place. Do not force the harness into the connector with the wrong polarity.

Remove trip unit outer pole screws and red plastic washers from the breaker frame. Discard red plastic washers (fig. 7). For the M

frame, also remove the load

end trip unit mounting screws from the frame

(fig.

7a).

40752-072(2) Effective

6/02

Page

Fig.

.Aux~Iiary

switch

shown m the

Breaker

SOURCE

LOAD

Canlacis

Open''

pmilmn

Fig. 7a

M-Frame

Trip

Unit Installation

COVER

TORQUE

SCREWS

20-22

-1b

40752-072(2) Effective 6/02

Lefl

Contact Base

Right Contact Base

Page

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).

DO NOT EXCEED A TORQUE OF 12 LB-FT (16.27 n.m.) EXCESSIVE TORQUING WILL SHEAR SCREWS.

FAILURE TO APPLY THE REQUIRED TORQUE MAY

LEADTO EXCESSIVE HEATING AND CAUSE

NUISANCE TRIPPING OF THE CIRCUIT BREAKER.

For an M-Frame, also screw in and torque the load end screws to 6

8 Ib-ft. (8.14-10.85 N.m.).

CAUTION

Fig.

Left- and Right-Pole Contact Bases

Circuit Latch Breaker

Handle

Side Trip Side

Plate Unit Plate

Fig.

Trip Unit Installed in Circuit Breaker

Note: The two placed preferred, the 5/16 inch hexagonal be used the base.

trip

unit

the trip

unit

position the screws when the

Retaining Screws

outer retaining screws may be

conductor holes at

this

time. If

head wrench may

trip

unit

3.4 3-Pole (Non-Ground FauIt)Trip Unit Installation

Remove trip unit outer pole screws and red plastic washers from the breaker frame. Discard red plastic washers (fig. 7). For the M end trip unit mounting screws from the frame

(fig.

7a).

NOTE: The two

be placed

If preferred, the 5/16 inch hexagonal

be used the base.

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).

the trip

position the screws when the

DO NOT EXCEED A TORQUE OF 12 LB (16.27 SCREWS.

FAILURE TO APPLY THE REQUIRED TORQUE MAY

LEADTO EXCESSIVE HEATING AND CAUSE

N.M). EXCESSIVE TORQUING WILL SHEAR

NUISANCE TRIPPING OF THE CIRCUIT BREAKER.

-F

rame, also remove the load

trip

unit

outer retaining screws may

unit

conductor holes at

CAUTION

head wrench may

trip

this

unit

time.

40752-072(2) Effective

6/02

Page

For an M-Frame, also screw in and torque the load end screws to 6

3.5

Final Installation Instructions (All Trip Units)

Install accessory(ies), 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 hand poles of trip unit and in fourth pole current sensor applicable.

Make sure interphase barriers and sliding handle barrier are in place.

Install circuit breaker covers and pan shown in Fig.

THE RATING PLUG MECHANICALLY INTERLOCKS WITH THE TRIP UNIT. IF RATING PLUG CORRECTLY INSTALLED, THE CIRCUIT BREAKER CANNOT BE RESET

POSITION

8 Ib-ft. (8.14-10.85 N.m.)

required, using the appropriate

CAUTION

PLACED IN THE ON

and right

head screws as

NOT

until the arrow points to ENGAGED. If an adjustable rating plug is used, four continuous current settings are possible. Set the switch marked A, B, C, D to the current rating desired.

Note: The reverse procedure rating plug. Turn the Push remove breaker to button and gently pull. A small screwdriver placed under the left edge of the rating plug will assist in removal.

Reset circuit breaker by moving handle to the reset position. Move handle to the handle should remain at the

Press Push tripping of the circuit breaker.

position.This action will cause the circuit

trip.Then grasp the lip of the Push-to-Trip

-to-

Trip button (in rating plug) to check manual

used to remove the

-to-

Trip button to the

position. Circuit breaker

position.

Torque 20-22 IN-LB

Fourth

Fig.

Note: Before attempting to install the rating plug, the arrow must be pointing toward the REMOVE can be done with a small screwdriver.

Install rating plug. Position the rating plug as shown in Fig.

10. Insert the rating plug in the trip plunger must align correctly with the matching receptacles and slot in the trip unit. After the rating plug is pressed into position, depress the Push screwdriver and turn it clockwise one quarter of a turn

Cover Screw

the Push-to-Trip button portion of the plug

Installation Positions

position.This

unit.The pins and

-to-

Trip button with a small

Trip

Unit

Fig.

Installing Rating Plug

4.0

PRINCIPLE OF OPERATION

In open air at 40"C, an Q-Frame circuit breaker with an

Electronic RMS

up to 800 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 However, the trip unit contains thermal temperature protective circuitry that initiates a trip operation for self protection if the internal ambient temperature at the printed circuit board (PCB) reaches approximately 100°C. This may occur for open air temperatures above 40°C with circuit breaker currents near full load.

Trip Unit installed will carry continuously

-20"

to +55"C.

40752-072 (2) Effective

6/02

Page

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 A

4.1 General

llen-Bradley for recommendations.

The Electronic RMS Trip Unit provides a tripping signal to the flux transfer shunt trip when current and time delay settings are exceeded. This is accomplished by employing the Allen

-Bradley custom designed integrated circuit

SpreTMchip, which includes a microcomputer to perform

its numeric and logic functions.

In the Electronic RMS

Trip Unit, all required sensing and tripping power to operate its protection function is derived from the current sensors in the circuit breaker. The secondary currents from these sensors provide the correct input information for the protection functions, as well as tripping power, whenever the circuit breaker is carrying current. These current signals develop analog voltages across the appropriate calibrating resistors.

The microcomputer, in cyclic fashion, repeatedly scans the voltage values across each calibrating resistor and enters these values into memory. These data are used to calculate true RMS current values, which are then repeat edly compared with the protection function settings and other operating data stored in the memory. The software program then determines whether to initiate protection functions, including tripping the breaker through the flux transfer shunt trip device in the circuit breaker.

4.2 Overload Trip:

In accordance with standards require

ments, the trip unit initiates a trip of the circuit breaker within two hours for an overload of 135 percent, and will trip in less time for higher overload currents.

“Thermal Memory” effect prevents the breaker from

being re

energized immediately after an overload.

“cooling off” period of up to 5 minutes is required, which allows time for cabling to cool off.

4.3 Short Delay/lnstantaneous Trip:

conditions that exceed the short delay pick

For short circuit

up settings,

the trip unit initiates a trip after a delay prescribed by the

I2t ramp function for trip units with catalog number suffixes

LS, LSG.

flat response time delay action

is provided by trip units with catalog number suffixes LSI,

(I)

and LSIG unless the instantaneous

setting

is selected.

4.4 Ground Fault Protection:

fault pick

up and time delay settings shown in Table 1-2

When selected, ground

allow selective ground fault coordination with other circuit protection devices.

5.0

PROTECTION SETTINGS

5.1 General

Prior to placing any circuit breaker in operation, each trip

unit protection setting must be set to the values specified by the engineer responsible for the installation. The available settings along with the effect of changing the settings are illustrated in Figures 12

1 to 12-3.

The installed rating plug establishes the maximum

(I,)

continuous current rating

of the circuit breaker. Short

delay current settings are defined in multiples of ln. One to four time and pick-up adjustment settings are

available depending on the particular trip unit purchased.

rotary switch is provided for each setting. The rotary

switch is adjusted using a small flatblade screwdriver

(Figure 11).

5.2 Short Delay Pick-up Setting

Seven settings are available that range from 2 to shown in Figure 12

Electronic RMS

5.3 Short DelayTime Settings

1. This feature is included on all

Trip Units.

For catalog number LS and LSG the short time delay is an

ramp configuration with the actual time delay a

function of the trip current involved.

For catalog number LSI and LSIG the short time delay

is a flat response. Four settings (I,.1, .2, .3 second)

are available (see Figure 12-2). The "I" setting

gives a trip response with no intentional delay

(Instantaneous).

5.4 Instantaneous Pickup Setting

For catalog number LSI and LSIG Instantaneous Pickup

is achieved by setting Short Delay Time to "I"

(Instantaneous.) Short Delay Pickup (see paragraph 5.2)

then becomes Instanta

5.5

Ground Fault Pick-up Setting

Five settings ranging from 1 through

(see Figure 12

3) and correspond to the fixed ampere

neous Pickup.

5 (xlG)

are available

values listed on the trip unit nameplate and in Table 1.2.

Note: These ampere values are always the same no matter what rating plug is installed in the circuit breaker.

, .

(I,)

40752-072(2) Effective 6/02

5.6 Ground FaultTime Settings

The ground fault time delay is a flat response with four settings

setting gives a trip response with no intentional delay

(I,

.15, .3,

second) available (Figure 12-3).The

(Instantaneous). This option is available on Catalog Nos.

LSG and LSIG.

Page

6.OTESTING

6.1 Functional Field Testing

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.

Performance Testing for Ground Fault Trip Units

6.2

6.2.1 Code Requirements

The National Electrical Code under Article 230-95-C requires that any ground

fault protection system be performance tested when first installed. The test shall be conducted in accordance with approved instructions

Fig.

Remove-

Adjustment Switches and Test Points

Short

Delay Pickup

(Multiples

3@7

Rated

Current

LTest

Jacks

Ilh

1,)

Short Delay Pick-up (Multiples

Rated

irrent)

Fig.

12-1

Short Delay Trip Current Adjustment and Curve Details

40752-072(2) Effective

6/02

Current

Fig.

Current

12-2

Short Delay Trip Current and Short Delay Trip Time Adjustment and Curve Details

Page

300\(!&

’*+

Time

Current

Fig. 12-3 Ground Fault Trip Current, and Ground Fault Trip

Time Adjustments 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.

6.2.2 Standards Requirements

a follow-up to the basic performance requirements

stipulated by the

1053 requires that certain minimum instructions must accompany each ground fault protection system. These following statements plus a copy of the test record form

illustrated in Fig. 16 are shipped with each Elect RMS

Trip Unit.

6.2.3 General Test Instructions

The interconnected system shall be evaluated in accor dance with the equipment assembler’s detailed instruc tions by qualified personnel.

The polarity of the neutral sensor connections (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 assembler.

The grounding points of the system shall be verified to determine that ground paths do not exist that would bypass the sensors. The use of high

resistance bridges may be used.

N.E.C.

as stated above, UL Standard

ronic

voltage testers and

No.

2x-Ex

2x-8x 2x.8~ 2x-Ex

See

Fig.

2-7

and Continuation of Short Time Instantaneous Portions of Curves

Fig.

Current

Rating Plug Setting (Amperes)

2-8

for

Fig. 13 Optional Adjustable Ampere Setting Rating

Plug Used in

THERE

BURN WHENEVER WORKING IN ELECTRICAL EQUIPMENT. ALWAYSTURN OFF POWER SUPPLYING BREAKER BEFORE

CONDUCTING TESTS.

Note: Since the Electronic RMS their operating power from the phase currents, and not from the neutral current, passing current through the neutral sensor only will not properly test the ground fault feature.

Using a low voltage (0-24 volt), high current, apply a test current of 125% of the Electronic RMS Ground of the circuit breaker, as shown in Fig. 14 cause the breaker to trip in less than 1 second, and alarm indicator is supplied, it should operate. Reset the breaker and the alarm indicator. Repeat the test on the other two phases.

A HAZARD OF ELECTRICAL SHOCK

FaultTrip Unit pick-up setting through one phase

Electronic RMS

WARNING

Trip Unit

AROUND

Trip Units derive

source,

1 .This should

40752-072(2) Effective

6/02

Source

Load Current-Lim

Resisto!

(if required1

voltage

iring

Source

Load

Current Limiting Resistor (if

required)

Page

Fig. 14-1 Connections for Ground Fault

Voltage

Source

Current Limiting Resistor

(if

required)

Trip

Test

Fig. 14-2 Connections for Ground Fault No-Trip Test, with

a Four

Wire System

Fig. 15 Typical Rating Plug

Fig. 14-3 Connections for Ground Fault No-Trip Test, with

a Three

40752-072(2) Effective

Wire System

6/02

Page

GROUND FAULT

Ground Fault Test Record should be Retained Installation in order to be available

Test Date

Circuit Breaker Number

TEST

RECORD FORM

the Authority having Jurisdiction.

Those in Charge

Results

the Building's Electrical

Tested By:

Fig.

Typical Performance Test Record Form

40752-072(2) Effective

6/02

Page

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. not trip, and the alarm indicator,

operate. Repeat the test on the other two phases.

If the system is a 3 sensor, apply the same current as described above through any two phases of the breaker, with the connec tions exactly as shown in Fig. 14-3. The breaker should not trip, and the alarm indicator, operate. Repeat the test using the other two combinations of breaker phases.

FIELDTESTING SHOULD BE USED FOR FUNCTIONALTESTING AND NOT FIELD

CALIBRATION OF THE ELECTRONIC RMS GROUND

FAULTTRIP UNIT.

ANY TEMPORARY CONNECTION MADE PURPOSE OF CONDUCTING TESTS SHOULD BE RESTOREDTO PROPER OPERATING CONDITIONS BEFORE

The results of the test are to be recorded on the test form provided with the equipment.

7.0

The rating plug, as illustrated in Figure 15, is used to establish the continuous ampere rating of the related circuit breaker.

RETURNINGTHE BREAKERTO SERVICE.

RATING PLUG

wire system with no neutral current

CAUTION

14-2.The breaker should

supplied, should not

FORTHE

For adjustable rating plugs (Table 1 current carrying conductors used with the breaker must be sized to correspond with the maximum setting of the rating plug, in accordance with National Electric Code requirements.

The Long Delay protection function of the trip unit is set at the rating plug value neous protection functions are set as a multiple of In.The Ground Fault protection function is independent of

Different rating plugs are available (Table 1-2) to match the desired current rating and type of circuit breaker into which the trip unit is to be installed.

Complete catalog descriptions of all available rating plugs are given in the applicable circuit breaker supplementary instruction leaflets (see Section

8.0 REFERENCES

8.1 Q

Frame Molded Case Circuit Breakers

40752-078

Contact AB

8.2 Internal Accessories:

accessories, which mount on the trip unit, are available for use. The number of the instruction leaflet covering the installation of each accessory is shown.

Alarm (Signal)/Lockout (ASL) Switch

Auxiliary Switch

ShuntTrip

Undervoltage Release Mechanism (Handle Reset

.................................................... 40752-075

........................................................... 40752-070

((,).The Short Delay and Instanta

Frame Instruction Leaflet

Typical Time

curves for L Frame Breakers

The following types of internal

........................................... 40752-074

-2), the primary

8.0).

Current Characteristic

...........40752-076

In.

40752-072(2) Effective 6/02

Trip Unit Functions

Long Delay Fixed Ampere Rating¬ with Fixed Long Delay

Table 1-1. Electronic RMS Trip Units

3 Pole

Electronic RMS Trip Unit type Catalog Numbers

LS LSI LSG LSIG

Page 13

Adjustable ampere Setting with fixed

Long Delay Short Delay Adjustable Short

Delay Pick-up with Short Delay Time

t Ramp

Adjustable Short Delay Time® with Adjustable Short Delay Pick-up, or

Adjustable Instantaneous Pick-up®

Instant Fixed

Instantaneous (Override)¯

Ground Adjustable Ground Fault Fault Pick-up with

Adjustable Ground

Fault Time Fourth 100% rating for Pole fourth pole Protection

60% rating for

fourth pole

ll ll

Fourth pole

unprotected ¬ Fixed rating plugs available, see Table 1-2

 Optional four-setting adjustable rating plugs available, see Table 1-2 ® Using trip unit with adjustable short delay time (LSI, LSIG), instantaneous pick-up is achieved when the lowest time delay setting

(1) is selected. ¯ A non-adjustable override setting is set at the frame withstand rating.

40752-072(2) Effective 6/02

Page

Table 1-2. Electronic RMS Trip Unit

Trio Function Ampere Rating

Fixed at 100%

Adjustable Long

Delay Pick

Short Delay Pick-up (Adjustable)

Short (Fixed)

Short

(Adlustable)

Instantaneous

Pick-upO

Ground Fault

Ground Fault Time

DelayTime

Pick (Adjustable)

Delay

Not UL Listed Occurs with short delay time adjustment set at

Function and Rating Settings

RatinalSettina Descriotion

Fixed rating plugs available

Trip Unit Fixed Rating Plugs

Amoere Ratina

600A

630A

800A

Trip Unit

Ampere Rating

600A

630A

800A

(I,)

IZt ramp configuration

Flat response with time delay settings at 100 ms

Trip Unit

Ampere Rating

600A 800A

Settinas at instantaneous

300A, 350A, 400A, 500A, 600A 300A, 315AO, 350A, 400A, 500A, 600A, 630AO

400A. 500A. 600A. 700A. 800A

Adjustable Rating Plugs

300A-400A-500A-600A

31 5A-400A-500A-630A

400A-500A-630A-800A

multiples

with marks at 2-3-4-5-6-7-8x

installed rating plug amperes

200

ms and 300 ms

Settings

120A, 240A, 360A, 480A, and 600A 160A, 320A, 480A, 640A, and 800A

(1).

(I,)

(IJO

fI I or 400A-500A-600A-800A

150ms. 300ms. and 500ms

(I,)

(I-!

(I,)

40752-072(2) Effective 6/02

Printed in U.S.A./TQC

Rockwell Automation 140U Q User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual