Basler Electric BE1-50/51B-218 User Manual

INSTRUCTION MANUAL

FOR

OVERCURRENT RELAYS

BE1-50/51B-218 and BE1-50/51B-228

Publication: 9252000995
Revision: H 01/09

INTRODUCTION

This instruction manual provides information about the operation and installation of the BE1-50/51B-218
and BE1-50/51B-228 Overcurrent Relays. To accomplish this, the following information is provided:

 General Information and Specifications
 Controls and Indicators
 Functional Description
 Installation and Maintenance
 Testing

WARNING!

To avoid personal injury or equipment damage, only qualified personnel should
perform the procedures in this manual.

NOTE

Be sure that the relay is hard-wired to earth ground with no smaller than 12 AWG
copper wire attached to the ground terminal on the rear of the unit case. When
the relay is configured in a system with other devices, it is recommended to use a
separate lead to the ground bus from each unit.

9252000995 Rev H BE1-50/51B-218/-228 Introduction i

First Printing: March 1996

Printed in USA

© 2009 Basler Electric, Highland Illinois 62249 USA

All Rights Reserved

January 2009

CONFIDENTIAL

of Basler Electric, Highland Illinois, USA. It is loaned for confidential use, subject
to return on request, and with the mutual understanding that it will not be used in
any manner detrimental to the interest of Basler Electric.

It is not
provide data for every possible contingency regarding installation or operation. The availability and design
of all features and options are subject to modification without notice. Should further information be
required, contact Basler Electric.

the intention of this manual to cover all details and variations in equipment, nor does this manual

INFORMATION

BASLER ELECTRIC

ROUTE 143, BOX 269

HIGHLAND IL 62249 USA

http://www.basler.com, [e-mail]

PHONE [phone] FAX [phone]

ii BE1-50/51B-218/-228 Introduction 9252000995 Rev H

REVISION HISTORY

The following information provides a historical summary of the changes made to this instruction manual
(9252000995). Revisions are listed in reverse chronological order.

Manual

Revision and Date

H, 01/09

G, 03/08

F, 01/07

E, 12/06

D, 02/03

C, 12/00

B, 12/99

A, 05/98

—, 03/96

 Updated Storage statement in Section 4.
 Modified Figure 5-2, Target Operational Test Setup.
 In Section 5, modified Target Test so that TIME and INST targets

can be verified independently from each other.

 Minor text edits throughout manual.
 Updated front panel drawings to show new reset button.

 Updated descriptions of targets and reset button.
 Moved Time Characteristic Curve Figures to Appendix A.

 Added manual part number and revision to footers.
 Updated Figure 4-1, Outline Dimensions for Case S1.

 Updated Figure 4-2, Panel Drilling Diagram for Case S1.
 Moved Revision History to the front of manual.

 Changed manual to cover the BE1-50/51B-228 in addition to the

BE1-50/51B-218.

 Re-organized the specifications in Section 1.
 Updated drawings in Section 2 to reflect changes to the PC board.

 Also updated the rest of the manual to reflect the change in switch

call out from SW8 to SW3.

 Added new functionality to the PICKUP LED. It is now the

ACTIVE/PICKUP LED and will be green when active and red when
picked up.

 Changed all references to target test current to one ampere

alternating current.

 Added Patent number to Specifications. Changed manual format to

reflect the current style.

 Initial release

Change

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iv BE1-50/51B-218/-228 Introduction 9252000995 Rev H

CONTENTS

SECTION 1  GENERAL INFORMATION ................................................................................................ 1-1

SECTION 2  CONTROLS AND INDICATORS........................................................................................ 2-1

SECTION 3  FUNCTIONAL DESCRIPTION...........................................................................................3-1

SECTION 4  INSTALLATION .................................................................................................................. 4-1

SECTION 5  TESTING ............................................................................................................................ 5-1

APPENDIX A  TIME CHARACTERISTIC CURVES................................................................................A-1

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vi BE1-50/51B-218/-228 Introduction 9252000995 Rev H

SECTION 1  GENERAL INFORMATION

TABLE OF CONTENTS

SECTION 1  GENERAL INFORMATION ................................................................................................1-1

INTRODUCTION....................................................................................................................................1-1

FEATURES............................................................................................................................................1-1

Advantages.........................................................................................................................................1-2

SPECIFICATIONS................................................................................................................................. 1-2

Current Sensing Input ........................................................................................................................1-2

Time Overcurrent (51) Element.......................................................................................................... 1-2

Instantaneous Overcurrent (50) Element...........................................................................................1-5

Burden................................................................................................................................................ 1-6

Frequency Response......................................................................................................................... 1-7

Transient Response........................................................................................................................... 1-7

Harmonic Response........................................................................................................................... 1-7

Target Indicators ................................................................................................................................1-8

Output Contacts .................................................................................................................................1-8

Type Tests.......................................................................................................................................... 1-8

Environment .......................................................................................................................................1-9

Agency Recognition ........................................................................................................................... 1-9

Physical..............................................................................................................................................1-9

Figures

Figure 1-1. Integrating Reset Characteristic Curve...................................................................................1-5

Figure 1-2. Instantaneous Characteristic Curves......................................................................................1-6

Figure 1-3. Burden Characteristics............................................................................................................ 1-7

Figure 1-4. Harmonic Rejection................................................................................................................. 1-8

Tables

Table 1-1. GE IAC Relays Suitable For Direct Replacement.................................................................... 1-1

Table 1-2. Time Characteristic Curve Constants with SW3-3 Open (Off)................................................. 1-3

Table 1-3. Time Characteristic Curve Constants with SW3-3 Closed (On)..............................................1-4

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ii BE1-50/51B-218/-228 General Information 9252000995 Rev H

SECTION 1  GENERAL INFORMATION

INTRODUCTION

BE1-50/51B-218 and BE1-50/51B-228 overcurrent relays are direct replacements for General Electric
IAC relays. BE1-50/51B-218 and BE1-50/51B-228 protective relays are enclosed in an S1 case. The
BE1-50/51B-218 has a 5 ampere current sensing input. The BE1-50/51B-228 has a 1 ampere current
sensing input. Compatible IAC model numbers are listed in Table 1-1.

Table 1-1. GE IAC Relays Suitable For Direct Replacement

IAC Model Number Curve Type

12IAC51AA
12IAC51BA
12IAC53AA
12IAC53BA
12IAC55AA
12IAC55BA

12IAC66AA

12IAC66BA
12IAC77AA
12IAC77BA

Inverse
Inverse with Instantaneous
Very Inverse
Very Inverse with Instantaneous
Short Time
Short Time with Instantaneous
Long Time
Long Time with Instantaneous
Extremely Inverse
Extremely Inverse with Instantaneous

 Any digit covering all pickup ranges and 50 Hz or 60 Hz models.

Basler Electric BE1-50/51B-218 and BE1-50/51B-228 protective relays are self-powered, microprocessor­based, non-directional phase or ground relays that monitor the magnitude of a single-phase ac current to
provide accurate instantaneous and time overcurrent protection for 50 Hz or 60 Hz power systems. Each
model covers 10 popular time characteristics and a wide range of pickup settings.

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.
Also, an integrating reset function is available to simulate the disk reset of electromechanical relays.

BE1-50/51B-218 and BE1-50/51B-228 overcurrent relays have 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
 Built-in accuracy eliminates internal adjustments
 Minimum transient overreach
 Field selectable characteristic curve selection similar to either GE IAC or ABB 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 ABB type
curves, and instantaneous or integrating reset characteristics. Switch location and description is provided
in Section 2.

9252000995 Rev H BE1-50/51B-218/-228 General Information 1-1

Advantages

BE1-50/51B-218 and BE1-50/51B-228 overcurrent relays have 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

BE1-50/51B-218 and BE1-50/51B-228 overcurrent relays 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-218 and BE1-50/51B-228 electrical and physical specifications are listed in the following
paragraphs.

Current Sensing Input

BE1-50/51B-218

Continuous Current: 14 Aac
One Second Rating: 400 Aac

BE1-50/51B-228

Continuous Current: 2.8 Aac
One Second Rating: 80 Aac

Time Overcurrent (51) Element

Setting the T
state and may be used as a safety setting.

BE1-50/51B-218 Pickup

Setting Range: 0.5 to 15.9 Aac
Setting Increment: 0.1 Aac
Accuracy: ±2%, ±25 milliamperes at or above 0.5 ampere setting

BE1-50/51B-228 Pickup

Setting Range: 0.1 to 3.18 Aac
Setting Increment: 0.02 Aac
Accuracy: ±2%, ±5 milliamperes at or above 0.1 ampere setting

Dropout

Dropout occurs at 95% of pickup value.

Timing Range

0.0 to 9.9 seconds in 0.1 second steps.

IME PICKUP control at the minimum pickup setting places the relay in the most sensitive

Timing Accuracy

The timing accuracy is the sum of ±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. The measurement of the multiple of tap has an accuracy that
is the sum of ±2%, ±25 milliamperes for the BE1-50/51B-218 and ±2%, ±5 milliamperes for the BE1­50/51B-228.

1-2 BE1-50/51B-218/-228 General Information 9252000995 Rev H

Timing Accuracy Example (BE1-50/51B-218)

PU setting: 5 amperes
Current Applied: 6.5 amperes
+ Multiple Tolerance: 6.655 amperes
– Multiple Tolerance: 6.345 amperes
Time Curve: E
Time Dial: 5.0
Minimum time dial
using 6.655 amperes: 46.5470 seconds
Maximum time dial
using 61.3968 amperes: 61.3968 seconds
Curve time using 6.5 amperes: 53.1800 seconds

Curve Characteristics

Nine inverse time functions and one fixed time function can be selected by the front-panel Curve switch.
Characteristic curves for the inverse and definite time functions are defined by the following equation.

Where: T

T

T

AD

N

KBD



CM

-

A, B, C, N, K = constants for the particular curve

= time to trip in seconds

T

D = time dial setting

M = multiple of pickup setting

Time characteristic curve constants are listed in Tables 1-2 and 1-3. Constants have been selected to
conform to the characteristics of electromechanical relays over a range of pickup multiples from 1.3 to 40.
Values of the constants are provided for use in computer relay setting software. Timing accuracy is 1
cycle, 2 percent of time to trip.

Table 1-2. Time Characteristic Curve Constants with SW3-3 Open (Off)

Curve Type 

BE1 Similar To

Figure

Number †

A B C N K R

Constants

S ABB CO-2 A-1 0.2663 0.03393 1.000 1.2969 0.028 0.500
L ABB CO-5 A-2 5.6143 2.18592 1.000 1.000 0.028 15.750
D ABB CO-6 A-3 0.4797 0.21359 1.000 1.5625 0.028 0.875

M ABB CO-7 A-4 0.3022 0.12840 1.000 0.5000 0.028 1.750

I ABB CO-8 A-5 8.9341 0.17966 1.000 2.0938 0.028 9.000
V ABB CO-9 A-6 5.4678 0.10814 1.000 2.0469 0.028 5.500
E ABB CO-11 A-7 7.7624 0.02758 1.000 2.0938 0.028 7.750
B BS142-B ‡ A-8 1.4638 0.00000 1.000 1.0469 0.028 3.250

C BS142-C ‡ A-9 8.2506 0.00000 1.000 2.0469 0.028 8.000

F None § N/A 0.0000 1.00000 0.000 0.0000 0.000 1.000

9252000995 Rev H BE1-50/51B-218/-228 General Information 1-3

Table 1-3. Time Characteristic Curve Constants with SW3-3 Closed (On)

Curve Type 

BE1 Similar To

Figure

Number †

A B C N K R

Constants

S GE IAC 55 A-10 0.0286 0.0208 1.000 0.9844 0.028 0.0940
L GE IAC 66 A-11 2.3955 0.00002 1.000 0.3125 0.028 7.8001
D ABB CO-6 A-3 0.4797 0.21359 1.000 1.5625 0.028 0.8750

M ABB CO-7 A-4 0.3022 0.12840 1.000 0.5000 0.028 1.7500

I GE IAC 51 A-12 0.2747 0.1042 1.000 0.4375 0.028 0.8868
V GE IAC 53 A-13 4.4309 0.0991 1.000 1.9531 0.028 5.8231
E GE IAC 77 A-14 4.9883 0.0129 1.000 2.0469 0.028 4.7742
B BS142-B ‡ A-8 1.4636 0.00000 1.000 1.0469 0.028 3.2500

C BS142-C ‡ A-9 8.2506 0.00000 1.000 2.0469 0.028 8.0000

F None § N/A 0.0000 1.00000 0.000 0.0000 0.000 1.0000

Notes for Tables 1-2 and 1-3
 BE1 Curve Types: S: Short Inverse V: Very Inverse

L: Long Inverse E: Extremely Inverse
D: Definite Time B: BS142 Very Inverse
M: Moderately Inverse C: BS142 Extremely Inverse
I: Inverse F: Fixed Time Delay

† Figure numbers refer to the characteristic curves located in Appendix A, Time Characteristic Curves.
‡ Curves B and C are defined in British Standard BS142 and IEC Standard IEC 255-4.

§ Fixed time delay, adjustable from 0.1 to 9.9 seconds.

Integrating Reset

Reset begins when the current drops below 95% of pickup. Integrating reset simulates the disk reset of
electromechanical relays. BE1-50/51B-218 and BE1-50/51B-228 relays provide the integrating reset
function even when input current falls to zero.

Integrating reset characteristics are defined by the following equation and shown in Figure 1-1. Equation
constants are provided in Tables 1-2 or 1-3.

Integrating Reset Equation:

Where:

T

= Time to reset in seconds

RD

T



R

2

1M 

R

R = Constant for the particular curve
D = TIME DIAL setting
M = Current in multiples of PICKUP setting during reset

1-4 BE1-50/51B-218/-228 General Information 9252000995 Rev H

100.0

10.0

xRD (Seconds)

1.0

0.000 0.200 0.400 0.600 0.800 1.000 1.200

Multiple of Pickup

Vertical axis xRD (Seconds) is applicable for all curves and is derived from
multiplying the constant R for the curve selected times D (the Time Dial setting).

Figure 1-1. Integrating Reset Characteristic Curve

P0046-11

Instantaneous Overcurrent (50) Element

Setting the I

NST PICKUP control to the minimum pickup setting places the relay in the most sensitive

state and may be used as a safety setting.

BE1-50/51B-218 Pickup

Setting Range: 1 to 99 Aac
Setting Increment: 1 Aac
Accuracy: ±2%, ±25 milliamperes at or above 1.0 ampere setting

BE1-50/51B-228 Pickup

Setting Range: 0.2 to 19.8 Aac
Setting Increment: 0.2 Aac
Accuracy: ±2%, ±5 milliamperes at or above 0.2 ampere setting

Dropout

Dropout occurs at 95% of pickup value.

Curve Characteristics

Instantaneous characteristic curves are similar to standard electromechanical instantaneous units.
However, the time to trip for applications where the initial current through the relay is less than 0.4
ampere (5 ampere relay) or 0.08 ampere (1 ampere relay) may be slightly longer. This may occur on a
very lightly loaded circuit or when the relay is providing ground protection and is connected to measure
neutral current. Figure 1-2 shows the instantaneous characteri stic curves for maximum time to trip.

An additional fixed delay of 0.1 second may be added with internal switch SW3-2. This delay applies to
both phase and ground applications. Closing switch SW3-2 provides an additional delay of 0.1 second.
Section 2 illustrates the location of SW3.

The instantaneous element in BE1-50/51B-218 and BE1-50/51B-228 relays may be set lower than the
instantaneous element in IAC relays and still have the same reach. This is because the BE1-50/51B-218
and BE1-50/51B-228 instantaneous element effectively eliminates the fault current transient overreach
components. When calculating BE1-50/51B-218 and BE1-50/51B-228 relay instantaneous element
settings, calculate the symmetrical value without any adder for transient overreach.

9252000995 Rev H BE1-50/51B-218/-228 General Information 1-5

Figure 1-2. Instantaneous Characteristic Curves

Burden

Burden is non-linear. Figure 1-3 illustrates the devi

ce burden.

BE1-50/51B-218

At 0.5 amperes: 4.8 
At 5.0 amperes: 0.2 

BE1-50/51B-228

At 0.1 ampere: 120 
At 1.0 ampere: 5 

1-6 BE1-50/51B-218/-228 General Information 9252000995 Rev H

Figure 1-3. Burden Characteristics

Frequency Response

A chang
pickup.

Transient Response

<10% ove

Harmonic Response

Figure 1-4 shows that a
containing 40% seventh harmonic. This corresponds to a 10:1 rejection ratio. Other conditions may be
evaluated in the same manner.

9252000995 Rev H BE1-50/51B-218/-228 General Information 1-7

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

rreach with system time constants up to 40 ms.

relay set for 1 ampere pickup would pick up at 0.96 amperes with a current

Figure 1-4. Harmonic Rejection

Target Indicators

Gravity latch

ed, manually reset targets indicate that current of 0.2 amperes or greater was present in the
trip circuit. Target coil resistance is less than 0.1 ohms and operate time is less than one millisecond. See
Output Contacts for maximum current rating.

Output Contacts

Output co

ntacts 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).

Type Tests

Isolation

Meets IEC 255-5 and exceeds IEEE C37.90-1989, one-minute dielectric (high potential) tests as follows.
All circuits to ground: 2,828 Vdc or 2,000 Vac

Input to Output Circuits: 2,828 Vdc or 2,000 Vac

Surge Withstand Capability Qualified to IEEE C37.90.1-1989 Standard Surge Withstand Capability (SWC) Tests for Protective Relays

and Relay Systems.
Impulse

Qualified to IEC 255-5.

1-8 BE1-50/51B-218/-228 General Information 9252000995 Rev H

Radio Frequency Interference (RFI)

Field-tested using a 5-watt, hand-held transceiver operating at random frequencies centered around 144
MHz and 440 MHz, with the antenna located 6 inches from the relay in both horizontal and vertical
planes.

Vibration

Withstands 2 G in each of three mutually perpendicular planes swept over the range of 10 to 500 Hz for a
total of 6 sweeps, 15 minutes each sweep.

Shock

Withstands 15 G in each of three mutually perpendicular planes.

Environment

Operating Te

mperature: –40C to 70C (–40F to158F)

Storage Temperature: –50C to 70C (–58F to 158F).

Agency Recognition

GOST-R Certification

GOST-R certified per the relevant stan

dards of Gosstandart of Russia.

Physical

Ca

se Size: S1 (Refer to Section 4, Installation for case dimensions.)

Weight: 6.4 lb (2.77 kg)

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1-10 BE1-50/51B-218/-228 General Information 9252000995 Rev H

SECTION 2  CONTROLS AND INDICATORS

TABLE OF CONTENTS

SECTION 2  CON

INTRODUCTION....................................................................................................................................

Figures

Figure 2-1. Front Panel Controls and Indicators .......................................................................................2-1

Figure 2-2. Location of SW3......................................................................................................................2-2

Tables

Table 2-1. BE1-50/51B-218 and BE1-50/51B-228 Controls and Indicators..............................................2-3

TROLS AND INDICATORS........................................................................................2-1

2-1

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ii BE1-50/51B-218/-228 Controls and Indicators 9252000995 Rev H

SECTION 2  CONTROLS AND INDICATORS

INTRODUCTION

Figure 2-1 illustrates the front panel controls and indicators of the BE1-50/51B-218 and BE1-50/51B-228.
Figure 2-2 illustrates the location of switch SW3. Both illustrations have lettered call-outs that correspond
to the control and indicator descriptions provided in Table 2-1.

Figure 2-1. Front Panel Controls and Indicators

9252000995 Rev H BE1-50/51B-218/-228 Controls and Indicators 2-1

P0053-50

SW3

Figure 2-2. Location of SW3

2-2 BE1-50/51B-218/-228 Controls and Indicators 9252000995 Rev H

Table 2-1. BE1-50/51B-218 and BE1-50/51B-228 Controls and Indicators (Refer to Figures 2-1 and 2-2)

Locator Control or Indicator Function

A INST MANUAL TRIP

Test Points

B INST PICKUP

Selectors

C Targets

D TIME PICKUP

Selectors

E

F

CURVE Selector Ten position selector switch to select one of nine inverse functions

TIME DIAL Selectors Two selector switches (UNITS and TENTHS) to select the desired

G TIME MANUAL TRIP

Test Points

When shorted, the test points (jacks) provide a secure means to
manually trip the controlled breaker. Jacks accept a standard 0.08
inch diameter phone tip plug.

Two switches (TENS and UNITS) to select pickup current in
amperes. Changing switch selectors while the relay is in service
may cause tripping.

Red target indicators latch when the trip circuit current is greater
than 0.2 amperes. One target each for TIME and INST.

Two switches (UNITS and TENTHS) t o select pickup current in
amperes. Changing switch selectors while the relay is in service
may cause tripping.

or one fixed time function.

characteristic curve. A setting of 0.0 results in instantaneous
operation without any intentional delay. A setting of 9.9
corresponds to the typical time provided by an electromechanical
relay at its maximum dial setting.

When shorted, the test points provide a secure means to manually
trip the controlled breaker. Jacks accept a standard 0.08 inch
diameter phone tip plug.

H

ACTIVE/PICKUP LED Red LED indicates sensed current has ex ceeded the TIME

PICKUP setting. LED turns from red to green when sensed current
falls below 95% of pickup setting. When the LED is green, the
relay is active but has not picked up.

I

Target RESET Button Linkage extends through back of front cover to reset both gravity

latched target indicators.

SW3 

SW3-1

SW3-1 selects the system operating frequency. SW3-1 open
(OFF) selects 60 Hz operation. SW3-1 closed (ON) selects 50 Hz
operation.

SW3-2

SW3-2 provides additional time delay for the instantaneous
element. Closing switch SW3-2 (ON) provides an additional
instantaneous delay of 0.1 second.

SW3-3

SW3-3 provides selection of GE IAC type curves or ABB type
curves. Closing switch SW3-3 (ON) selects GE IAC type curves
(refer to Table 1-3). Opening switch SW3-3 (OFF) selects ABB
type curves (refer to Table 1-2).

SW3-4

SW3-4 provides selection of either instantaneous or integrating
reset characteristics. Closing S W3-4 (ON) selects integrating reset
characteristics. Opening SW3-4 (OFF) selects instantaneous reset
characteristics.

 NOTE: In Revision G and previous relays, switch SW3 is designated as SW8.

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SECTION 3  FUNCTIONAL DESCRIPTION

TABLE OF CONTENTS

SECTION 3  FUNCTIONA

GENERAL..............................................................................................................................................

FUNCTIONAL DESCRIPTION ..............................................................................................................3-1

Sensing Input......................................................................................................................................

Power Supply.....................................................................................................................................

Instantaneous Signal.......................................................................................................................... 3-1

Time Signal.........................................................................................................................................

Microprocessor...................................................................................................................................

Power-Off Sensing.............................................................................................................................3-1

Outputs...............................................................................................................................................

Figures

Figure 3-1. Functional Block Diagram....................................................................................................... 3-2

L DESCRIPTION...........................................................................................3-1

3-1
3-1

3-1
3-1

3-1
3-2

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ii BE1-50/51B-218/-228 Functional Description 9252000995 Rev H

SECTION 3  FUNCTIONAL DESCRIPTION

GENERAL

BE1-50/51B-218 and BE1-50/51B-228 Overcurrent Relays are microprocessor based non-directional
relays that measure ac current to provide secure and reliable instantaneous and time overcurrent
protection for power systems.

FUNCTIONAL DESCRIPTION

Sensing Input

Single phase ac current from system current transformers (CT) is brought into the Overcurrent Relay at
terminals 5 and 6. Refer to Figure 3-1 to follow the functional description. The input current is applied to
internal power and signal CTs.

Power Supply

nt from the power CT is rectified, filtered, and supplied to all relay internal circuitry for operating

Curre
power. A precision +5 Vdc supply also serves as a reference for automatic calibration.

Instantaneous Signal

nt from the signal CT is rectified and applied to the instantaneous scaling resistors controlled by the

Curre
INST PICKUP selector switches. The analog voltage of the instantaneous input signal developed across
the scaling resistors is filtered and applied to the multiplexor (MUX).

Time Signal

nt from the signal CT is also rectified and applied to the time scaling resistors controlled by the TIME

Curre
PICKUP selector switches. The analog voltage of the time input signal is also filtered and applied to the
multiplexor.

Microprocessor

Operating po
microprocessor is active and executing code, the ACTIVE/PICKUP LED is green. When the input current
falls below an acceptable level, the supervisor circuit interrupts the microprocessor, halts further
operation, and turns OFF the ACTIVE/PICKUP LED. A microprocessor watchdog feature resets the
microprocessor program when the program flow is interrupted.

Information from the TIME DIAL selector switches, the TIME CURVE selector switch, and the 50/60 Hz,
INST DELAY, and RESET CHAR switches is also applied to the microprocessor. The microprocessor
uses these inputs to set the operating parameters.

When the microprocessor is ready for analog information from the multiplexor, microprocessor control
signals cause the multiplexor to route the desired input through to the output. The output is converted
from an analog value to a digital value and applied to the microprocessor.

The microprocessor performs the program operations based on the inputs and the internal software
program. When the sensed current exceeds the TIME PICKUP setting, the ACTIVE/PICKUP LED turns
from green to red. TIME contacts (51) are closed in accordance with the time characteristic equation. If
the sensed current exceeds the INST PICKUP setting, the INST contacts (50) are closed.

Power-Off Sensing

r-off sensing circuits measure the voltage across a capacitor at power-down and at power-up.

Powe
These circuits determine how long power has been removed based on the difference voltage and the
circuit RC time constant. This provides information for the integrating reset function even when power has
been entirely removed.

wer from the power supply is applied to the microprocessor supervisor circuit. When the

9252000995 Rev H BE1-50/51B-218/-228 Functional Description 3-1

Outputs

Instantaneous and Timed

System circuit breakers controlled by the output contacts can be manually tripped by applying a short
across the TIME or INST MANUAL TRIP front panel test points. Current flow in the trip circuit is indicated
by the operation of the target. The targets will not operate without adequate operating power for the relay.

WARNING!

Trip circuit voltage is present at the front panel test points. When shorting the test
points, use insulated jumpers to avoid contact with these voltages.

Figure 3-1. Functional Block Diagram

3-2 BE1-50/51B-218/-228 Functional Desc

ription 9252000995 Rev H

SECTION 4  INSTALLATION

TABLE OF CONTENTS

SECTION 4  INSTALLATION ..................................................................................................................4-1

GENERAL..............................................................................................................................................4-1

MOUNTING............................................................................................................................................4-1

FACTORY SETTINGS...........................................................................................................................4-4

APPLICATION COORDINATION.......................................................................................................... 4-4

CONNECTIONS ....................................................................................................................................4-6

MAINTENANCE.....................................................................................................................................4-7

STORAGE..............................................................................................................................................4-7

Figures

Figure 4-1. Outline Dimensions for S1 Case, Semi-Flush Mounting.........................................................4-1

Figure 4-2. Panel Drilling Diagram for S1 Case, Semi-Flush Mounting....................................................4-2

Figure 4-3. Panel Drilling Diagram for S1 Case, Projection Mounting...................................................... 4-3

Figure 4-4. Outline Dimensions for S1 Case, Projection Mounting........................................................... 4-4

Figure 4-5. Coordination Timing Diagram.................................................................................................4-5

Figure 4-6. AC Input Connections............................................................................................................. 4-6

Figure 4-7. DC Control Connections.........................................................................................................4-7

9252000995 Rev H BE1-50/51B-218/-228 Installation i

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ii BE1-50/51B-218/-228 Installation 9252000995 Rev H

SECTION 4  INSTALLATION

GENERAL

When not shipped as part of a control or switchgear panel, the relays are shipped in sturdy cartons to
prevent damage during transit. Immediately upon receipt of a relay, check the model and part number
against the requisition and packing list to see that they agree. Visually inspect the relay for damage that
may have occurred during shipment. If there is evidence of damage, immediately file a claim with the
carrier and notify the Regional Sales Office, or contact the Sales Representative at Basler Electric,
Highland, Illinois.

Proper operation of the relay may be confirmed by performing the operational test procedure of Section 5.
If the relay won't be installed immediately, store the relay in its original shipping carton in a moisture and
dust-free environment.

MOUNTING

Relay outline dimensions and panel drilling diagrams are shown in Figures 4-1 through 4-4. Dimensions
in parentheses are in millimeters.

Figure 4-1. Outline Dimensions for S1 Case, Semi-Flush Mounting

9252000995 Rev H BE1-50/51B-218/-2

D2750-29

28 Installation 4-1

Figure 4-2. Panel Drilling Diagram for S1 Case, Semi-Flush Mounting

4-2 BE1-50/51B-218/-228 Installation

9252000995 Rev H

Figure 4-3. Panel Drilling Diagram for S1 Case, Projection Mounting

9252000995 Rev H BE1-50/51B-218/-2

28 Installation 4-3

2.40

(62.48)

1.95

(49.53)

4.03

(102.4)

4.03

(102.4)

6.19

(157.2)

AA

.25

(6.4)

MOUNTING PANEL

5/16-18 STUD
2 PLACES

CASE

DETAIL A-A

SHOWING THE ADDITION OF WASHERS

OVER THE BOSS TO TIGHTEN THE

RELAY AGAINST THE PANEL.

MOUNTING PANEL

PANEL

10-32 SCREWS

.31

(7.9)

TERMINAL EXTENSION (TYP.)
FOR DETAILED INSTRUCTIONS.
SEE THE TERMINAL PROJECTION

.75

(19.1)

MOUNTING KIT SUPPLIED.

2.195

(55.75)

NOTE: PROJECTION MOUNT USES WASHERS OVER THE BOSSES AS SHOWN IN THIS ILLUSTRATION.

Figure 4-4. Outline Dimensions for S1 Case, Projection Mounting

FACTORY SETTINGS

Factory settings for the internal switches of SW3 are as follows:

 SW3-1 — OFF (60 hertz operation).
 SW3-2 — OFF (0.0 additional fixed delay for the instantaneous element).
 SW3-3 — ON (GE IAC type characteristic curves).
 SW3-4 — ON (Integrating reset characteristics).

D2750-25

12-17-99

APPLICATION COORDINATION

In a typical application coordination scheme, a BE1-50/51B-218 or BE1-50/51B-228 is being used to
provide primary protection for a radial distribution feeder. An electromechanical overcurrent relay with
extremely inverse timing provides protection for the transformer and bus. To improve coordination with
the electromechanical relay, the BE1 relay with integrating reset characteristic has the time characteristic

4-4 BE1-50/51B-218/-228 Installation

9252000995 Rev H

curve E (extremely inverse) selected (SW3-3 set to OFF) and the TIME DIAL set to 2.0. The feeder



reclosing relay is set for two reclose attempts at 3 and 15 seconds after the initial trip. If a permanent fault
occurs (magnitude ten times pickup), calculate the feeder breaker trip time for each of the three
operations. Refer to Section 1 for characteristic curve constants.

From the time characteristic curve equation.

T

Trip

AD



N



CM

KBD



.





276247



09382

.

524815

.

.



110



110806124



seconds 0.209

0280202758.0

.



028005516.0

.



From the reset characteristic curve equation.

RD

T



2



Reset

27.75



10





2

1M



seconds 15.5

M = 0 if current goes to zero.
Negative result indicates reset time.

Results: Full trip = 0.209 seconds and full reset = 15.5 seconds if current goes to zero.

In Figure 4-5,
T
T
T

= 0.209 seconds (relay was at reset).

A

= value < TA because rewind has not gone to zero.

B

= value < TA because rewind has not gone to zero.

C

Figure 4-5. Coordination Timing Diagram

9252000995 Rev H BE1-50/51B-218/-228 Installation 4-5











Equation for time to trip during rewind (before relay is reset).

Second Operation

T

Occurence This Trip



T



B

30.209

15.5



Time RewindTrip Full

Rewind Full



Third Operation

B

T



C

C

seconds 0.040T

15.5

seconds 0.161T

11.960.209



CONNECTIONS

Typical ac input and dc control connections are shown in Figures 4-6 and 4-7. Refer to the block diagram
in Section 3 for relay internal connections.

NOTE

Be sure that the relay is hard-wired to earth ground with no smaller than 12 AWG
copper wire attached to the ground terminal on the rear of the unit case. When
the relay is configured in a system with other devices, it is recommended to use a
separate lead to the ground bus from each unit.

Figure 4-6. AC Input Connections

4-6 BE1-50/51B-218/-228 Installation 9252000995 Rev H

Figure 4-7. DC Control Connections

MAINTENANCE

BE1-50/51B-214 and BE1-50/51B-225 overcurrent relays require no preventive maintenance. However,
periodic checks should be performed according to scheduled practices. A recommended periodic test is
provided in Section 5. If the relay fails to function properly, contact the Technical Sales Support
Department of Basler Electric.

STORAGE

This device contains long-life aluminum electrolytic capacitors. For devices that are not in service (spares
in storage), the life of these capacitors can be maximized by energizing the device for 30 minutes once
per year.

9252000995 Rev H BE1-50/51B-218/-228 Installation 4-7

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4-8 BE1-50/51B-218/-228 Installation 9252000995 Rev H

SECTION 5  TESTING

TABLE OF CONTENTS

SECTION 5  TESTING ............................................................................................................................5-1

GENERAL..............................................................................................................................................5-1

DIELECTRIC TEST ............................................................................................................................... 5-1

OPERATIONAL TEST PROCEDURE................................................................................................... 5-1

Test Equipment Required...................................................................................................................5-1

Test Procedure, Models BE1-50/51B-218 (Five Ampere Sensing Input)..........................................5-3

Test Procedure, Models BE1-50/51B-228 (One Ampere Sensing Input)..........................................5-5

SETTING THE RELAY .......................................................................................................................... 5-7

PERIODIC TESTS................................................................................................................................. 5-7

General............................................................................................................................................... 5-7

Periodic Test.......................................................................................................................................5-7

Figures

Figure 5-1. Pickup and Timing Test Setup................................................................................................ 5-2

Figure 5-2. Target Operational Test Setup................................................................................................ 5-2

9252000995 Rev H BE1-50/51B-218/-228 Testing i

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ii BE1-50/51B-218/-228 Testing 9252000995 Rev H

SECTION 5  TESTING

GENERAL

Dielectric testing, operational testing, and periodic testing are described in the following paragraphs.

DIELECTRIC TEST

In accordance with IEC 255-5 and IEEE C37.90-1989, one-minute dielectric (high potential) tests may be
performed as follows:

All circuits to ground: 2,828 Vdc or 2,000 Vac
Input to output circuits: 2,828 Vdc or 2,000 Vac

Output contacts are surge protected.

OPERATIONAL TEST PROCEDURE

The following procedures verify operation of relays BE1-50/51B-218 (5 ampere model) and BE1-50/51B­228 (1 ampere model). The test setup of Figures 5-1 and 5-2 are intended primarily as an illustration of
the principles involved. Other test setups known to be capable of testing with the stated and implied
tolerances (including equipment specifically designed for testing relays) may be used.

Test Equipment Required

Current source with a range from 0 to 20 Aac (sensing input current)


 AC or DC voltage source (target operation)
 Timer or counter

CAUTION

To ensure proper timing during testing, before each test, remove the current from
the unit for R times D seconds (refer to Section 1, Specifications, Time Reset for
R and D definitions).

9252000995 Rev H BE1-50/51B-218/-228 Testing 5-1

TEST SET

BE1-50/51B

TIMEINST

65 3 1

2

Figure 5-1. Pickup and Timing Test Setup

D1148-25

12-09-99

CURRENT

SOURCE

START

STOP
INPUT

AMPS

TIMER

65

AC or DC

Voltage
Source

(V)

BE1-50/51B

INST

R = V/1
Rwatts = 1*V

R

1 A Target Current

P0057-21

23

TIME

1

Figure 5-2. Target Operational Test Setup

TEST SET

CURRENT
SOURCE

START

STOP
INPUT

AMPS

TIMER

5-2 BE1-50/51B-218/-228 Testing 9252000995 Rev H

NOTE

When testing TIME overcurrent functions, INST PICKUP settings of 00 will affect
the calibration of the TIME functions. TIME PICKUP settings of 00 also affect
INST functions.

Test Procedure, Models BE1-50/51B-218 (Five Ampere Sensing Input)

Time Pickup Test

Perform preliminary setup:

 Connect test setup as shown in Figure 5-1.
 Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to

ON and SW3-4 to ON.

 Set TIME DIAL to 0.0.
 Set CURVE to S
 Set TIME PICKUP to 0.5.
 Set INST PICKUP to 90.

Step 1. Slowly increase current to terminals 5 and 6. PICKUP LED should turn RED at a maximum input

current of 0.550 ampere.
Step 2. Decrease input current until PICKUP LED turns GREEN then OFF.
Step 3. Set TIME PICKUP to 2.2.
Step 4. Slowly increase current to terminals 5 and 6. PICKUP LED should change from GREEN to RED

at an input current of 2.131 to 2.269 amperes.
Step 5. Decrease input current until PICKUP LED turns OFF.

INST Pickup Test

Perform preliminary setup:

 Connect test setup as shown in Figure 5-1.
 Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to

ON, and SW3-4 ON.

 Set TIME DIAL to 0.0.
 Set CURVE to S
 Set TIME PICKUP to 15.9.
 Set INST PICKUP to 01.

Step 1. Slowly increase current to terminals 5 and 6. INST contacts should close at an input current of

0.955 to 1.045 amperes.
Step 2. Decrease input current until INST output contacts open.
Step 3. Set INST PICKUP to 08.
Step 4. Slowly increase current to terminals 5 and 6. INST contacts should close at an input current of

7.815 to 8.185 amperes.
Step 5. Decrease input current until INST output contacts open.

Time Dial Test

Perform preliminary setup:

 Connect test setup as shown in Figure 5-1.
 Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to

ON, and SW3-4 ON.

 Set TIME DIAL to 4.5.
 Set CURVE to S
 Set TIME PICKUP to 1.0.
 Set INST PICKUP to 90.

9252000995 Rev H BE1-50/51B-218/-228 Testing 5-3

Step 1. Prepare to apply 1.5 amperes input current to terminals 5 and 6 and record the elapsed time from

when current is applied until TIME output contacts close.

Step 2. Apply the current (step from 0 to 1.5 amperes) and record the elapsed time. Elapsed time should

be 0.345 to 0.424 seconds. (This tolerance is greater than ±2 % because it is the accumulation of
both pickup and timing tolerances.)

Step 3. Remove input current.

Target Test

Perform preliminary setup:

 Connect test setup as shown in Figure 5-2.
 Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to

ON, and SW3-4 ON.

 Set TIME DIAL to 4.5.
 Set CURVE to S
 Set TIME PICKUP to 1.0.
 Set INST PICKUP to 90.

Step 1. Set voltage source to provide a target current of 1.0 ampere.
Step 2. Apply 5 amperes input current to terminals 5 and 6. Check that the TIME target operates.
Step 3. Remove input current and reset target.
Step 4. Set TIME PICKUP to 15.9 and set INST PICKUP to 01.
Step 5. Set voltage source to provide a target current of 1.0 ampere.
Step 6. Apply 5 amperes input current to terminals 5 and 6. Check that the INST target operates.
Step 7. Remove input current and reset target.

Manual Trip Test

Perform preliminary setup:

 Connect test setup as shown in Figure 5-2.
 Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to

ON, and SW3-4 ON.

 Set TIME DIAL to 4.5.
 Set CURVE to S
 Set TIME PICKUP to 1.0.
 Set INST PICKUP to 01.

WARNING!

Trip circuit voltage is present at the front panel test points. When shorting the test
points, use insulated jumpers to avoid contact with these voltages.

Step 1. Set voltage source to provide a target current of 1.0 ampere.
Step 2. Apply 0.9 ampere input current to terminals 5 and 6. (0.9 ampere provides input power but stays

below pickup.)

Step 3. Connect a jumper between TIME MANUAL TRIP test points. Check that TIME target operates.
Step 4. Connect a jumper between INST MANUAL TRIP test points. Check that INST target operates.
Step 5. Reset targets.

Integrating Reset Test

Perform preliminary setup:

 Connect test setup as shown in Figure 5-1.
 Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to

ON, and SW3-4 ON.

 Set TIME DIAL to 9.9.

5-4 BE1-50/51B-218/-228 Testing 9252000995 Rev H

 Set CURVE to V.
 Set TIME PICKUP to 1.0.
 Set INST PICKUP to 90.

Step 1. Set voltage source to provide a target current of 1.0 ampere.
Step 2. Read all of Step 3 before beginning Step 3.
Step 3. Apply 4.0 amperes input current to terminals 5 and 6. After the unit trips, remove the input current

for 29 ±0.25 seconds, then reapply the 4.0 amperes input current. Record the elapsed time from
the re-application of input current to the output retrip.

Result: Elapsed time should be 2.08 ±0.4 seconds.

Test Procedure, Models BE1-50/51B-228 (One Ampere Sensing Input)

Time Pickup Test

Perform preliminary setup:

 Connect test setup as shown in Figure 5-1.
 Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to

ON and SW3-4 to ON.

 Set TIME DIAL to 0.0.
 Set CURVE to S
 Set TIME PICKUP to 0.5.
 Set INST PICKUP to 18.0.

Step 1. Slowly increase current to terminals 5 and 6. PICKUP LED should turn RED at a maximum input

current of 0.110 ampere.
Step 2. Decrease input current until PICKUP LED turns GREEN then OFF.
Step 3. Set TIME PICKUP to 0.44.
Step 4. Slowly increase current to terminals 5 and 6. PICKUP LED should change from GREEN to RED

at an input current of 0.426 to 0.454 amperes.
Step 5. Decrease input current until PICKUP LED turns OFF.

INST Pickup Test

Perform preliminary setup:

 Connect test setup as shown in Figure 5-1.
 Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to

ON, and SW3-4 ON.

 Set TIME DIAL to 0.0.
 Set CURVE to S
 Set TIME PICKUP to 3.18.
 Set INST PICKUP to 0.2

Step 1. Slowly increase current to terminals 5 and 6. INST contacts should close at an input current of

0.191 to 0.209 amperes.
Step 2. Decrease input current until INST output contacts open.
Step 3. Set INST PICKUP to 08.
Step 4. Slowly increase current to terminals 5 and 6. INST contacts should close at an input current of

1.563 to 1.637 amperes.
Step 5. Decrease input current until INST output contacts open.

Time Dial Test

Perform preliminary setup:

 Connect test setup as shown in Figure 5-1.
 Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to

ON, and SW3-4 ON.

 Set TIME DIAL to 4.5.

9252000995 Rev H BE1-50/51B-218/-228 Testing 5-5

 Set CURVE to S
 Set TIME PICKUP to 0.2.
 Set INST PICKUP to 18.0.

Step 1. Prepare to apply 0.3 amperes input current to terminals 5 and 6 and record the elapsed time from

when current is applied until TIME output contacts close.

Step 2. Apply the current (step from 0 to 0.3 amperes) and record the elapsed time. Elapsed time should

be 0.345 to 0.424 seconds. (This tolerance is greater than ±2 % because it is the accumulation
of both pickup and timing tolerances.)

Step 3. Remove input current.

Target Test

Perform preliminary setup:

 Connect test setup as shown in Figure 5-2.
 Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to

ON, and SW3-4 ON.

 Set TIME DIAL to 4.5.
 Set CURVE to S
 Set TIME PICKUP to 0.2.
 Set INST PICKUP to 19.8.

Step 1. Set voltage source to provide a target current of 1.0 ampere.
Step 2. Apply 1 ampere input current to terminals 5 and 6. Check that the TIME target operates.
Step 3. Remove input current and reset target.
Step 4. Set TIME PICKUP to 3.18 and set INST PICKUP to 0.2.
Step 5. Set voltage source to provide a target current of 1.0 ampere.
Step 6. Apply 1 ampere input current to terminals 5 and 6. Check that the INST target operates.
Step 7. Remove input current and reset target.

Manual Trip Test

Perform preliminary setup:

 Connect test setup as shown in Figure 5-2.
 Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to

ON, and SW3-4 ON.

 Set TIME DIAL to 4.5.
 Set CURVE to S
 Set TIME PICKUP to 0.2.
 Set INST PICKUP to 0.2.

WARNING!

Trip circuit voltage is present at the front panel test points. When shorting the test
points, use insulated jumpers to avoid contact with these voltages.

Step 1.

Set voltage source to provide a target current of 1.0 ampere.

Step 2. Apply 0.15 ampere input current to terminals 5 and 6. (0.15 ampere provides input power but

stays below pickup.)

Step 3. Connect a jumper between TIME MANUAL TRIP test points. Check that TIME target operates.
Step 4. Connect a jumper between INST MANUAL TRIP test points. Check that INST target operates.
Step 5. Reset targets.

5-6 BE1-50/51B-218/-228 Testing 9252000995 Rev H

Integrating Reset Test

Perform preliminary setup:

 Connect test setup as shown in Figure 5-1.
 Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to

ON, and SW3-4 ON.

 Set TIME DIAL to 4.5.
 Set CURVE to I.
 Set TIME PICKUP to 0.20.
 Set INST PICKUP to 18.0.

Step 1. Set voltage source to provide a target current of 1.0 ampere.
Step 2. Read all of Step 3 before beginning Step 3.
Step 3. Apply 0.8 amperes input current to terminals 5 and 6. After the unit trips, remove the input current

for 20 ±0.25 seconds, then reapply the 0.8 amperes input current. Record the elapsed time from
the re-application of input current to the output retrip.

Result: Elapsed time should be 1.55 ±0.3 seconds.

SETTING THE RELAY

Select the desired relay settings before putting the relay into service. Changing pickup current settings
while the relay is in service may cause tripping.

PERIODIC TESTS

General

All relays should be tested periodically to identify and correct any problems that are found.
Single phase relays such as the BE1-50/51B-218 and BE1-50/51B-228 are normally used in groups of

four (three phase and ground) on the protected circuit. This relay scheme allows each unit to be
withdrawn one at a time for testing purposes without losing protection. Only three are required at any one
time to sense all types of faults on a grounded wye system. Refer to Figures 5-1 and 5-2 for
recommended test setups.

Periodic Test

Periodi
Step 1. Verify that the instantaneous pickup is within ±2% of the value set on the dials. Pickup occurs

Step 2. Verify that the time pickup is within ±2% of the value set on the dials. Pickup occurs when the

Step 3. Verify that the time to trip for the curve and time dial settings at a multiple of six is the same as

Step 4. Verify that the time to trip for the instantaneous element at a pickup multiple of 2 is not greater

Step 5. Verify that the targets operate with one ac ampere of trip current in the trip circuits and that they

c testing should consist of the following procedures.

when the INST output contacts close.

LED turns GREEN then RED.

the time given on the characteristic curve. Refer to Section 1 for the characteristics curves.

than the time given on the instantaneous characteristic curve. Refer to Section 1 for the
instantaneous characteristic curve.

can be reset using the RESET BUTTON.

9252000995 Rev H BE1-50/51B-218/-228 Testing 5-7

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5-8 BE1-50/51B-218/-228 Testing 9252000995 Rev H

APPENDIX A  TIME CHARACTERISTIC CURVES

TABLE OF CONTENTS

APPENDIX A  CHA

CHARACTERISTIC CURVES...............................................................................................................A-1

Figures

Figure A-1. Time Characteristic Curve, S-Short Inverse (SW3-3 OFF, Similar to ABB CO-2).................A-1

Figure A-2. Time Characteristic Curve, L-Long Inverse (SW3-3 OFF, Similar to ABB CO-5)..................A-2

Figure A-3. Time Characteristic Curve, D-Definite Time (Similar to ABB CO-6) ......................................A-3

Figure A-4. Time Characteristic Curve, M-Moderately Inverse (Similar to ABB CO-7).............................A-4

Figure A-5. Time Characteristic Curve, I-Inverse (SW3-3 OFF, Similar to ABB CO-8) ...........................A-5

Figure A-6. Time Characteristic Curve, V-Very Inverse (SW3-3 OFF, Similar to ABB CO-9) .................A-6

Figure A-7. Time Characteristic Curve, E-Extremely Inverse (SW3-3 OFF, Similar to ABB CO-11)........A-7

Figure A-8. Time Characteristic Curve, BS142-B (BS142 Very Inverse)..................................................A-8

Figure A-9. Time Characteristic Curve, BS142-C (BS142 Extremely Inverse).........................................A-9

Figure A-10. Time Characteristic Curve, S2-Short Inverse (SW3-3 ON, Similar to GE IAC 55).............A-10

Figure A-11. Time Characteristic Curve, L2-Long Inverse (SW3-3 ON, Similar to GE IAC 66)..............A-11

Figure A-12. Time Characteristic Curve, I2-Inverse (SW3-3 ON, Similar to GE IAC 51)........................A-12

Figure A-13. Time Characteristic Curve, V2-Very Inverse (SW3-3 ON, Similar to GE IAC 53)..............A-13

Figure A-14. Time Characteristic Curve, E2-Extremely Inverse (SW3-3 ON, Similar to GE IAC 77).....A-14

RACTERISTIC CURVES..........................................................................................A-1

9252000995 Rev H BE1-50/51B-218/-228 Time Characteristic Curves i

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ii BE1-50/51B-218/-228 Time Characteristic Curves 9252000995 Rev H

APPENDIX A  TIME CHARACTERISTIC CURVES

TIME CHARACTERISTIC CURVES

Figures A-1 through A-14 illustrate the time characteristic curves that are programmed into the nonvolatile
memory of this relay.

Figure A-1. Time Characteristic Curve, S-Short Inverse

(SW3-3 OFF, Similar to ABB CO-2)

9252000995 Rev H BE1-50/51B-218/-228 Time Char

acteristic Curves A-1

Figure A-2. Time Characteristic Curve, L-Long Inverse

(SW3-3 OFF, Similar to ABB CO-5)

A-2 BE1-50/51B-218/-228 Time Characteri

stic Curves 9252000995 Rev H

Figure A-3. Time Characteristic Curve, D-Definite Time

(Similar to ABB CO-6)

9252000995 Rev H BE1-50/51B-218/-228 Time Char

acteristic Curves A-3

Figure A-4. Time Characteristic Curve, M-Moderately Inverse

(Similar to ABB CO-7)

A-4 BE1-50/51B-218/-228 Time Characteri

stic Curves 9252000995 Rev H

Figure A-5. Time Characteristic Curve, I-Inverse

(SW3-3 OFF, Similar to ABB CO-8)

9252000995 Rev H BE1-50/51B-218/-228 Time Char

acteristic Curves A-5

Figure A-6. Time Characteristic Curve, V-Very Inverse

(SW3-3 OFF, Similar to ABB CO-9)

A-6 BE1-50/51B-218/-228 Time Characteri

stic Curves 9252000995 Rev H

Figure A-7. Time Characteristic Curve, E-Extremely Inverse

(SW3-3 OFF, Similar to ABB CO-11)

9252000995 Rev H BE1-50/51B-218/-228 Time Char

acteristic Curves A-7

Figure A-8. Time Characteristic Curve, BS142-B

(BS142 Very Inverse)

A-8 BE1-50/51B-218/-228 Time Characteri

stic Curves 9252000995 Rev H

Figure A-9. Time Characteristic Curve, BS142-C

(BS142 Extremely Inverse)

9252000995 Rev H BE1-50/51B-218/-228 Time Char

acteristic Curves A-9

Figure A-10. Time Characteristic Curve, S2-Short Inverse

(SW3-3 ON, Similar to GE IAC 55)

A-10 BE1-50/51B-218/-228 Time Characteri

stic Curves 9252000995 Rev H

Figure A-11. Time Characteristic Curve, L2-Long Inverse

(SW3-3 ON, Similar to GE IAC 66)

9252000995 Rev H BE1-50/51B-218/-228 Time Char

acteristic Curves A-11

Figure A-12. Time Characteristic Curve, I2-Inverse

(SW3-3 ON, Similar to GE IAC 51)

A-12 BE1-50/51B-218/-228 Time Characteri

stic Curves 9252000995 Rev H

Figure A-13. Time Characteristic Curve, V2-Very Inverse

(SW3-3 ON, Similar to GE IAC 53)

9252000995 Rev H BE1-50/51B-218/-228 Time Char

acteristic Curves A-13

Figure A-14. Time Characteristic Curve, E2-Extremely Inverse

(SW3-3 ON, Similar to GE IAC 77)

A-14 BE1-50/51B-218/-228 Time Characteri

stic Curves 9252000995 Rev H

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