Basler Electric BE1-50/51B-232 User Manual

INSTRUCTION MANUAL

FOR

OVERCURRENT RELAY

BE1-50/51B-232

Publication: 9252000896
Revision: B 12/08

INTRODUCTION

This instruction manual provides information about the operation and installation of the BE1-50/51B-232
Overcurrent Relay. 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.

9252000896 Rev B BE1-50/51B-232 Introduction i

First Printing: January 2007

Printed in USA

© 2008 Basler Electric, Highland Illinois 62249 USA

All Rights Reserved

December 2008

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-232 Introduction 9252000896 Rev B

REVISION HISTORY

The following information provides a historical summary of the changes made to this instruction manual
(9252000896). Revisions are listed in reverse chronological order.

Manual

Revision and Date

B, 12/08

A, 03/08

―, 01/07

 Updated Storage statement in Section 4.
 Modified Figure 5-2, Target Operational Test Setup.
 In Section 5, Testing, removed list of required tools and removed

steps about disconnecting and re-connecting relay terminal wires.

 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 target reset button.

 Initial release.

Change

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iv BE1-50/51B-232 Introduction 9252000896 Rev B

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-232 Introduction 9252000896 Rev B

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

Burden................................................................................................................................................ 1-5

Frequency Response......................................................................................................................... 1-6

Transient Response........................................................................................................................... 1-6

Harmonic Response........................................................................................................................... 1-6

Target Indicators ................................................................................................................................1-7

Output Contacts .................................................................................................................................1-7

Type Tests.......................................................................................................................................... 1-7

Environment ....................................................................................................................................... 1-8

Agency Recognition ...........................................................................................................................1-8

Physical..............................................................................................................................................1-8

Figures

Figure 1-1. Integrating Reset Characteristic Curve...................................................................................1-4

Figure 1-2. Instantaneous Characteristic Curves......................................................................................1-5

Figure 1-3. Burden Characteristics............................................................................................................ 1-6

Figure 1-4. Harmonic Rejection................................................................................................................. 1-7

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).............................................. 1-3

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ii BE1-50/51B-232 General Information 9252000896 Rev B

SECTION 1  GENERAL INFORMATION

INTRODUCTION

BE1-50/51B-232 protective relays are direct replacements for General Electric, IAC relays. BE1-50/51B­232 protective relays are enclosed in an S1 case. The BE1-50/51B-232 has a 5 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 except 50 Hz models.

Basler Electric BE1-50/51B-232 protective relays are self-powered, microprocessor-based, non­directional phase or ground relays that monitor the magnitude of a single-phase ac current to provide
accurate instantaneous and time overcurrent protection for 60 Hz power systems. Each model covers 15
popular time characteristics, a wide range of pickup settings, and field selectable instantaneous or
integrating reset.

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-232 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 0.0, 0.1, 0.2, or 0.3 second, fixed, instantaneous delay

Internal switches provide for selecting instantaneous element delays of 0.0, 0.1, 0.2, or 0.3 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.

9252000896 Rev B BE1-50/51B-232 General Information 1-1

Advantages

BE1-50/51B-232 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-232 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-232 electrical and physical specifications are listed in the following p aragraphs.

Current Sensing Input

Contin

uous Current: 14 Aac

One Second Rating: 400 Aac

Time Overcurrent (51) Element

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

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

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

Dropout

Dropout occurs at 95% of pickup value.

Timing Range

0.0 to 9.9 seconds in 0.1 second steps

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.

Timing Accuracy Example

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 6.345 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

1-2 BE1-50/51B-232 General Information 9252000896 Rev B

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

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-232 relays provide the integrating reset function even when input
current falls to zero.

9252000896 Rev B BE1-50/51B-232 General Information 1-3

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:

RD

T



R

2

1M



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

100.0

P0046-11

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

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.

Pickup

Setting Range: 1 to 99 Aac
Setting Increment: 1 Aac
Accuracy: ±2%, ±25 milliamperes at or above 1.0 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 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 characteristic curves for maximum time to trip.

An additional fixed delay of 0.1, 0.2, or 0.3 second may be added with internal switches SW3-1 and
SW3-2. This delay applies to both phase and ground applications. Closing switch SW3-1 provides an
additional delay of 0.2 second. Closing switch SW3-2 provides an additional delay of 0.1 second. Closing

1-4 BE1-50/51B-232 General Information 9252000896 Rev B

both SW3-1 and SW3-2 provides an additional delay of 0.3 second. Section 2 illustrates the location of
SW3.

The instantaneous element in BE1-50/51B-232 relays may be set lower than the instantaneous element
in ABB relays and still have the same reach. This is because the BE1-50/51B-232 instantaneous element
effectively eliminates the fault current transient overreach components. When calculating BE1-50/51B­232 relay instantaneous element settings, calculate the symmetrical value without any adder for transient
overreach.

P0048-10

Figure 1-2. Instantaneous Characteristic Curves

Burden

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

ce burden.

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

9252000896 Rev B BE1-50/51B-232 General Information 1-5

P0048-11

Figure 1-3. Burden Characteristics

Frequency Response

A chang

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

pickup.

Transient Response

<10% ove

rreach with system time constants up to 40 ms.

Harmonic Response

Figure 1-4 shows that a

relay set for 1 ampere pickup would pick up at 0.96 amperes with a current
containing 40% seventh harmonic. This corresponds to a 10:1 rejection ratio. Other conditions may be
evaluated in the same manner.

1-6 BE1-50/51B-232 General Information 9252000896 Rev B

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.

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.

9252000896 Rev B BE1-50/51B-232 General Information 1-7

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

ng Te

Operati

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

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

Agency Recog

GOST-R Certification

nition

GOST-R certified per the relevant standards of Gosstandart of Russia.

Physical

Case Size:

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

Weight: 6.1 lb (2.77 kg)

1-8 BE1-50/51B-232 General Information 9252000896 Rev B

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-231 Controls and Indicators (Refer to Figures 2-1 and 2-2)................................2-3

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

2-1

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ii BE1-50/51B-232 Controls and Indicators 9252000896 Rev B