Basler Electric BE1-50/51B-240 User Manual

INSTRUCTION MANUA L

FOR

BE1-50/51B-240

Overcurrent Relay

Publication: 9252000790 Revision: B 08/14

9252000790 Rev B i

Caution

Note

Preface

This instruction manual provides information about the installation and operation of the BE1-50/51B-240 Overcurrent Relay. To accomplish this, the following information is provided:

• General information and specifications

• Controls and indicators

• Functional description

• Installation and maintenance

• Testing

Conventions Used in this Ma nua l

Important safety and procedural information is emphasized and presented in this manual through Warning, Caution, and Note boxes. Each type is illustrated and defined as follows.

Warning!

Warning boxes call attention to conditions or actions that may cause personal injury or death.

Caution boxes call attention to operating conditions that may lead to equipment or property damage.

Note boxes emphasize important information pertaining to Overcurrent Relay installation or operation.

Overcurrent Relay Preface

ii 9252000790 Rev B

Basler Electric does not assume any responsibility to compliance or noncompliance with national code, local code, For terms of service relating to this product and software, see the Commercial Terms of Products and Services

document available at www.basler.com/terms.

It is not the intention of this manual to cover all details and variations in equipment, nor does this manual provide and options are subject to modification without notice. Over time, improvements and revisions may be made to this manual.

The English-language version of this manual serves as the only approved manual version.

12570 State Route 143

Highland IL 62249-1074 USA

www.basler.com

info@basler.com

Tel: +1 618.654.2341

Fax: +1 618.654.2351

First printing: November 2008

Warning!

READ THIS MANUAL. Read this manual before installing, operating, or maintaining the BE1-50/51B-

240. Note all warnings, cautions, and notes in this manual as well as on the product. Keep this manual with the product for reference. Failure to follow warning and cautionary labels may result in personal injury or property damage. Exercise caution at all times.

To prevent personal injury or equipment damage, only qualified personnel should install, operate, or service this system.

or any other applicable code. This manual serves as reference material that must be well understood prior to installation, operation, or maintenance.

data for every possible contingency regarding installation or operation. The availability and design of all features publication. Before performing any of the following procedures, contact Basler Electric for the latest revision of this

Preface Overcurrent Relay

9252000790 Rev B iii

Manual

Revision and Date

Change

–, 11/2008

• Initial release

A, 10/2012

• Added ABB/Westinghouse catalog number CO-2 to list of relays suitable

• Updated relay storage recommendation

B, 8/2014

• Added notes about relay compatibility in older CO relay applications

Revision History

The following information provides a historical summary of the changes made to this instruction manual (9252000790 Rev B). Revisions are listed in chronological order.

for replacement by BE1-50-51B-240

• Improved description of operating current jumpers for targets

Overcurrent Relay Revision History

iv 9252000790 Rev B

Revision History Overcurrent Relay

9252000790 Rev B v

Contents

General Information ...................................................................................................................................... 1

Controls and Indicators ................................................................................................................................. 7

Introduction ................................................................................................................................................ 7

Front Panel Controls and Indicators .......................................................................................................... 7

Circuit Board Controls ............................................................................................................................... 8

Functional Description ................................................................................................................................. 11

Introduction .............................................................................................................................................. 11

Function Block Descriptions .................................................................................................................... 11

Installation ................................................................................................................................................... 13

General .................................................................................................................................................... 13

Factory Settings ....................................................................................................................................... 13

Installation................................................................................................................................................ 13

Connections ............................................................................................................................................. 14

Application Coordination .......................................................................................................................... 15

Maintenance ............................................................................................................................................ 16

Storage .................................................................................................................................................... 16

Testing ......................................................................................................................................................... 17

Introduction .............................................................................................................................................. 17

Dielectric Test .......................................................................................................................................... 17

Test Procedures ...................................................................................................................................... 17

Characteristic Curves .................................................................................................................................. 23

Introduction .............................................................................................................................................. 23

Instantaneous Overcurrent Characteristics ............................................................................................. 23

Time Overcurrent Characteristics ............................................................................................................ 24

Integrating Time Reset Characteristic ..................................................................................................... 40

Overcurrent Relay Contents

vi 9252000790 Rev B

Contents Overcurrent Relay

9252000790 Rev B 1

Catalog Number

Curve Type

CO-2

Short Time

CO-5

Long Time

CO-6

Definite

CO-7

Moderately Inverse

CO-8

Inverse

CO-9

Very Inverse

CO-11

Extremely Inverse

Note

General Information

Introduction

The BE1-50/51B-240 protective relay is a direct replacement for ABB/Westinghouse type CO relays housed in an FT-21 case. The BE1-50/51B-240 has a 5-ampere current sensing input. Compatible ABB/Westinghouse model numbers are listed in Table 1.

Table 1. ABB/Westinghouse Relays Suitable for Direct Replacement

If replacing a CO relay manufactured prior to 1966, please contact Basler Electric to verify compatibility.

To replace an existing ABB/Westinghouse type CO relay, perform the following steps:

1. Select the desired relay settings on your new BE1-50/51B-240 relay.

2. Remove the existing ABB/Westinghouse relay cradle.

3. Insert the new relay cradle.

4. Close the knife-blade switches.

5. Install the new Basler Electric replacement cover glass into existing cover and secure with the

captive thumbnut.

The BE1-50/51B-240 relay is self-powered, compatible with 50 or 60 Hz power systems, and has two protection elements: one time overcurrent (51) element and one instantaneous overcurrent (50) element. The 51 element offers timing characteristic curves similar to those used by GE IAC and Westinghouse CO relays.

Features

A wide range of pickup settings and front panel selectable time characteristics permit applications involving coordination with fuses, reclosers, cold load pickup, motor starting, and fixed time requirements. In addition, an integrating reset function is available to simulate the disk reset of electromechanical relays.

The BE1-50/51B-240 overcurrent relay has the following standard features.

• Independent time and instantaneous elements

• A secure method to manually trip the breaker at the relay front panel

• Direct reading front panel controls

• Minimum pickup setting for safety during installation

• Time characteristics extend to a pickup multiple of 40

• Rugged draw-out construction with steel case

• Gravity latching targets retain indication without power

BE1-50/51B-240 General Information

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• Built-in accuracy eliminates internal adjustments

• Minimum transient overreach

• Field selectable characteristic curve selection similar to GE IAC or Westinghouse CO type curves

• Field selectable instantaneous or integrating reset

• Field selectable 50 or 60 Hz operation

• Field selectable 0.0 or 0.1 second, fixed, instantaneous delay

Internal switches provide for selecting system-operating frequencies of 50 or 60 Hz, instantaneous element delays of 0.0 or 0.1 second, characteristic curve group selection for either GE IAC or Westinghouse CO type curves, and instantaneous or integrating reset characteristics. Switch locations and descriptions are provided in the Controls and Indic ators chapter.

Advantages

The BE1-50/51B-240 overcurrent relay has many advantages over other overcurrent relays. The primary advantages are:

• Time characteristics are defined by equations and graphs

• Field selectable time characteristics

• Very low burden extends the linear range of the CTs

• Self-powered from the sensed current

• Continuous automatic calibration

The BE1-50/51B-240 overcurrent relay may be tested without removing the relay from the case. Shorting contacts are provided for all current inputs when the connection plugs or relay chassis is removed from the relay case.

Specifications

BE1-50/51B-240 electrical and physical specifications are listed in the following paragraphs.

Time Overcurrent (51) Element

Pickup

Setting Range: 0.5 to 15.9 Aac Setting Increment: 0.1 Aac Accuracy: Sum of ±2% and ±25 mAac

Dropout

Dropout occurs at 95% of pickup value.

Characteristic Curves

Available curve types follow IEEE Standard C37.112 (1996) and emulate standard GE IAC, Westinghouse CO, and BS142 curves. The Characteristic Curves chapter illustrates the available curves and lists the applicable constants.

Curve Types: Short Inverse, Long Inverse, Definite Time, Moderately Inverse, Inverse,

Very Inverse, Extremely Inverse, BS142 Very Inverse, BS142 Extremely

Inverse, Fixed Time Time Multiplier: 11 curves for each characteristic Timing Accuracy: ±1 cycle, ±2%. This accuracy applies to the range of 1.3 to 40 times tap

and is for a given measured multiple of tap.

Fixed Timing

Setting Range: 0.1 to 9.9 s Setting Increment: 0.1 s Timing Accuracy: ±1 cycle, ±2% of the time to trip for time dial settings ≥0.1.

General Information BE1-50/51B-240

9252000790 Rev B 3

Continuous Current

Current Sensing Input

-40 -20 0 20 40 60

Ambient Temperature (C)

Current (Aac)

Reset

Integrating: Simulates the disk reset of electromechanical relays and begins when

the current decreases below 95% of pickup. The Characteristic Curves

chapter illustrates the integrating reset characteristic curve and equation. Instantaneous: Reset occurs within 16 ms of when the current decreases below 95% of

the pickup level.

Instantaneous Overcurrent (50) Element

Pickup

Setting Range: 2 to 99 Aac Setting increment: 1 Aac Accuracy: Sum of ±2% and ±25 mAac

Dropout

Dropout occurs at 95% of pickup value.

Time Delay

Switch selectable—no intentional delay (SW3-2 OFF) or a fixed delay of 100 ms (SW3-2 ON). The Characteristic Curves chapter illustrates the characteristic curve for the 50 element.

Current Sensing Input

Continuous Rating: 14 Aac∗ 1 Second Rating: 400 Aac ∗ Continuous rating is 14 Aac for temperatures up to 45°C. See Figure 1 for de-rating curve.

Burden

Figure 1. Current Sensing Input De-rating Curve

Figure 2 illustrates the current sensing input burden characteristic. At 0.5 Aac: 2.8 Ω

At 5.0 Aac: 0.3 Ω

BE1-50/51B-240 General Information

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BE1-50/51B-230 CT Burden

100

120

140

160

0 10 20 30 40 50

Input Current (Amps)

Burden in VA (rms)

BE1-50/51B-240 CT Burden

Figure 2. Current Sensing Input Burden

Frequency Response

A change of ±5 Hz from the nominal 50/60 Hz current causes <0.5% change in the current required for pickup.

Transient Response

<10% overreach with system time constants up to 40 ms.

Harmonic Rejection

Rejection of odd and even harmonics is illustrated in Figure 3.

General Information BE1-50/51B-240

Figure 3. Harmonic Rejection

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Target Indicators

A gravity-latched, manually-reset, current-operated target indicator is provided for the time-overcurrent (51) trip output and the instantaneous overcurrent (50) trip output. The level of trip circuit current required to operate each target is individually controlled by a circuit board jumper. See the Controls and Indicators chapter for jumper locations and function assignments

Target Operate Current

Jumper Position—Pins 1 and 2: Must operate ≥ 2.25 A; must not operate < 900 mA.* Jumper Position—Pins 2 and 3: Must operate ≥ 200 mA; must not operate < 80 mA.*

∗ See Output Contacts for the maximum acceptable levels of trip circuit currents.

Output Contacts

Output contacts are surge protected and rated as follows.

Resistive Ratings

120/240 Vac: Make 30 amperes for 0.2 seconds, carry 7 amperes for 2 minutes, 3

amperes continuously, and break 5 amperes. 125/250 Vdc: Make 30 amperes for 0.2 seconds, carry 7 amperes for 2 minutes, 3

amperes continuously, and break 0.3 ampere.

Inductive Ratings

120/240 Vac, 125/250 Vdc: Make and carry 30 amperes for 0.2 seconds, carry 7 amperes for 2

minutes, 3 amperes continuously, and break 0.3 ampere. (L/R = 0.04).

Terminal Assignments

51 Element: 1, 10 50 Element: 2, 10

Type Tests

Isolation: IEEE C37.90-2005 Transient Surge: IEEE C37.90.1-2004 Radiated Interference: IEEE C37.90.2-2004 Electrostatic Discharge: IEEE C37.90.3-2006 Vibration: IEC 255-21-1 Shock and Bump: IEC 255-21-2

Environment

Operating Temperature: –40 to 70°C (–40 to 158°F) Storage Temperature: –50 to 70°C (–58 to 158°F)

Physical

Weight: 4.3 lb (2 kg)

BE1-50/51B-240 General Information

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General Information BE1-50/51B-240

9252000790 Rev B 7

Controls and Indicators

Introduction

BE1-50/51B-240 relay controls and indicators are located on the front panel and circuit board.

Front Panel Controls and Indi c a t ors

Front panel controls and indicators are illustrated in Figure 4 and described in Table 2. The locators and descriptions of Table 2 correspond to the locators shown in Figure 4.

Figure 4. Front Panel Controls and Indicators

BE1-50/51B-240 Controls and Indicators

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Locator

Description

Time Overcurrent Time Dial Selector Switches. These two rotary switches select the

these switches corresponds to a time delay of 0.0 to 9.9 seconds.

Curve Selector Switch. This ten position rotary switch selects one of nine inverse timing details about the timing characteristics of the BE1-50/51B-240.

Time Overcurrent Pickup Selector Switches. These two rotary switches select the time

sting these

selector switches while the relay is in service may cause the relay to trip.

Target Indicators. Re d target indicators latch when the c orresponding set of trip contacts

target indicators are reset by pressing the target reset button (locator G).

Instantaneous Overcurr ent Pickup Selector Switches. T hese two rotary switc hes select the

Note

Instantaneous Overcurrent Manual Trip Jacks. These jacks are used to manually trip a wire, terminated with two standard 0.08 inch diameter phone-tip plugs, into the two jacks.

Target Reset Button. This button is pressed to reset the two, gravity-latched target indicators (locator D).

Active/Pickup Indicator . This bicol or LED indicates the level of curr ent sensed by the relay.

up.

Time Overcurrent Manual Trip Jacks. These jacks are used to manually trip a breaker terminated with two standard 0.08 inch diameter phone-tip plugs, into the two jacks.

Table 2. Front Panel Controls and Indicators

desired curve of the tim ing charac teristic sel ected by the Cur ve Select or Switch ( locator B). When a fixed time charac teristic is use d (Curve Sele ctor Switch set ting of F), th e setting of

characteristics or one fixed time function. Refer to the Characteristic Curves chapter for

overcurrent pickup current setting in amperes (UNITS and TENTHS). Adju

closes and sufficient trip c ircuit current is detected. (The lev el of current that will trip each target indicator is jumper-selectable. See Circuit Boar d Controls for more informat ion.) The Time target indicates the flow of current in the time overcurrent (51) trip circuit. The Inst target indicates the flow of current in the instantaneous overcurrent (50) trip circuit. Both

instantaneous overcurrent (50) pickup current setting in amperes (UNITS and TENTHS). Adjusting these selector switches while the relay is in service may cause the relay to trip.

When testing time overcurrent functions, instantaneous pickup settings of 00 will affect the calibration of the time functions. Time pickup settings of 00 also affect instantaneous functions.

breaker controlled by the 50 trip output contacts. This is achieved by plugging a jumper

The LED is red when t he sensed curre nt exceeds th e time overcurren t pickup settin g. The LED color changes from red to green when the sense d c ur rent dec r eas es b elo w 95% of the time overcurrent pickup setting. A green LED indicates that the relay is active but not picked

controlled by the 51 trip output contacts. This is achieved by plugging a jumper wire,

Circuit Board Controls

Circuit board controls consist of two rotary selector switches, a four-position slide switch, and two jumpers. Circuit board controls are illustrated in Figure 5 and described in Table 3. The locators and descriptions of Table 3 correspond to the locators shown in Figure 5.

Controls and Indicators BE1-50/51B-240

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