Basler Electric BE1-50/51M User Manual

INSTRUCTION MANUAL

FOR

OVERCURRENT RELAY

BE1-50/51M

Publication: 9252000990
Revision: R 09/11

INTRODUCTION

This instruction manual provides information about the operation and installation of the BE1-50/51M
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.

9252000990 Rev R BE1-50/51M Introduction i

First Printing: April 1992

Printed in USA

© 1992-2011 Basler Electric, Highland Illinois 62249 USA

All Rights Reserved

September 2011

CONFIDENTIAL INFORMATION

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

BASLER ELECTRIC

12570 STATE ROUTE 143

HIGHLAND IL 62249 USA

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

PHONE [phone] FAX [phone]

ii BE1-50/51M Introduction 9252000990 Rev R

REVISION HISTORY

The following information provides a historical summary of the changes made to this instruction manual
(9252000990). Revisions are listed in reverse chronological order.

Manual

Revision and Date

R, 09/11

P, 12/08

N, 03/08

M, 11/00

L, 12/99

K, 02/99

J, 05/98

I, 07/97

H, 02/96

Change

 Updated year of IEEE C37.90 specifications in Section 1.
 Improved description of Locator H (Active/Pickup LED) in Table 2-1.
 Updated Storage statement in Section 4.

 Improved Figure 5-2, Target Operational Test Setup.
 Corrected sensing input terminal number references listed in

Section 3.

 Updated front panel drawings to show new target reset button.
 Added GOST-R to Section 1.
 Moved content of Section 7, Manual Change Information, to manual

Introduction.

 Moved Characteristic Curve graphs from Section 1 to new

Appendix A.

 Moved content of Section 6, Maintenance, into Section 4,

Installation.

 Updated drawings in Section 2 to reflect changes to the PC board.
 Updated 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 the current for testing the targets to an ac

only type of current.

 Page 2-2: added description to Locator K for 100 series relays, unit

revision Q and previous.

 Deleted Figure 2-2 from Section 2 and added it to new Section 8.
 Page 3-2: added description to Auxiliary Output Contacts for 100

series relays, unit revision R and subsequent.

 Added new Section 8, Relay Differences.

 Added Patent Number to Specifications and changed the manual

format to reflect current manual styles.

 Corrected Tables 1-3 and 1-4, Figure Number.
 Changed “pickup setting” to “pickup” on pages 1-7, Time

Characteristics equation, page 1-10, Time Reset, and Figures 1-7
through 1-15.

 Added Oscillatory to Surge Withstand Capability on page 1-12.
 Corrected Figure 1-18 to reflect the correct Time Dial range: 0.5 to

9.9.

 Changed Table 7-1 to add ECA and date data.

 Incorporated changed in series 200 relays that added five

characteristic curves and changed switch SW8-3 functionality.

 Changed Section 5, Testing, to incorporate setting all sections of

switch SW8.

9252000990 Rev R BE1-50/51M Introduction iii

Manual

Revision and Date

G, 10/95

F, 02/95

E, 09/94

D, 05/94

C, 06/93

B, 09/92

A, 05/92

―, 04/92

Change

 Corrected minor typographical errors in Section 1 and 2.
 Corrected Table 2-1, locator item K, Function.
 Changed Figure 5-2 and all testing target current source references

from 0.2 ampere to 1.0 ampere.

 Changed Table 7-1 to add ECA and date data.

 Changed all sections to reflect 200 series relay additions and relay

modifications that deleted P2 and P3 jumpers and added switch
SW8.

 Changed Specifications, TIME and ISNT PICKUP accuracy; Output

Circuits, and Isolation (Dielectric Test).

 Added new Figure 4-1 and bumped all following figures.
 Corrected old Figure 4-3, new Figure 4-4.

 Changed continuous current sensing input rating and clarified TIME

PICKUP and INST PICKUP specification ranges, page 1-4.

 Changed Figure 1-3 to also show one ampere unit burden data.
 Changed time characteristics accuracy statement, page 1-7.
 Added (repeated) equation for the characteristic curve time

functions, page 1-9.

 Changed Figure 1-5 to show one ampere unit starting data.
 Separated Section 4, Installation, into Section 4, Installation, and

Section 5, Testing, and bumped all subsequent sections.

 Added column for CT secondary to Table 1-1 and UL Recognition

and CSA Certification to specifications.

 Page 3-2: Deleted “or reset” from last sentence in paragraph

Outputs. Changed from “The targets will not operate or reset…” to
“The targets will not operate…”

 Page 4-1: Corrected dielectric test leakage current per terminal and

changed rack mounting plate part number from “9252000024” to
“9252012001”.

 Page 4-3: Added BE1-50/51M, vertical model rear view to Figure 4-

3.

 Page 1-1: Application, deleted reference to dust tight cover.
 Page 1-4: Specifications, TIME Dropout to not less than 95% of

pickup value.

 Page 1-7: Specifications, Time Reset, added statement to insure

sufficient power to power-up relay when using decaying
characteristic.

 Page 1-8: Specifications, corrected Storage Range Temperature

degrees F.

 Page 1-9: Defined British Standard curve types.
 Page 2-1: INST and TIME PICKUP selectors, added statement that

changing selectors while relay is in service may cause tripping.

 Page 4-7: Time Pickup Test, Step 1, changed 0.45 A to 0.485 A.
 Page 4-9: Time Pickup Test, Step 1, changed 0.09 A to 0.096 A.
 Page 4-11: Added paragraph SETTING THE RELAY.
 Added Section 6.

 Changed manual title to BE1-50/51M and incorporated engineering

changes accordingly.

 Initial release.

iv BE1-50/51M Introduction 9252000990 Rev R

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

SECTION 6 • RELAY DIFFERENCES...................................................................................................... 6-1

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

9252000990 Rev R BE1-50/51M Introduction v

vi BE1-50/51M Introduction 9252000990 Rev R

SECTION 1 • GENERAL INFORMATION

TABLE OF CONTENTS

SECTION 1 • GENERAL INFORMATION ................................................................................................ 1-1

Introduction ............................................................................................................................................ 1-1

Features ................................................................................................................................................. 1-1

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

Model Numbers ...................................................................................................................................... 1-3

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

Current Sensing Input ........................................................................................................................ 1-4

Time Overcurrent (51) Element .......................................................................................................... 1-4

Instantaneous Overcurrent (50) Element ........................................................................................... 1-6

Burden ................................................................................................................................................ 1-8

Frequency Response ......................................................................................................................... 1-8

Transient Response ........................................................................................................................... 1-8

Harmonic Response ........................................................................................................................... 1-9

Target Indicators ................................................................................................................................ 1-9

Output Contacts ................................................................................................................................. 1-9

AUX Output Contact ........................................................................................................................... 1-9

Type Tests ........................................................................................................................................ 1-10

Environment ..................................................................................................................................... 1-10

Agency Recognition ......................................................................................................................... 1-10

Physical ............................................................................................................................................ 1-10

Patent ............................................................................................................................................... 1-10

Figures

Figure 1-1. BE1-50/51M, C1 Horizontal Mount Case ................................................................................ 1-2

Figure 1-2. BE1-50/51M, C1 Vertical Mount Case
Figure 1-3. Integrating Reset Characteristic Curve

Figure 1-4. Instantaneous Characteristic Curves ...................................................................................... 1-7

Figure 1-6. Burden Characteristics
Figure 1-5. Harmonic Rejection

Tables

Table 1-1. BE1-50/51M Overcurrent Relays, One Ampere CT Secondary, 50/60 Hz .............................. 1-3

Table 1-2. BE1-50/51M Overcurrent Relays, Five Ampere CT Secondary, 50/60 Hz
Table 1-3. Time Characteristic Curve Constants with SW3-3 Open (Off) (Series 100 or 200 Relays)
Table 1-4. Time Characteristic Curve Constants with SW3-3 Closed (On) (Series 200 Relays)

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

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

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

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

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

.... 1-5

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

9252000990 Rev R BE1-50/51M General Information i

ii BE1-50/51M General Information 9252000990 Rev R

SECTION 1 • GENERAL INFORMATION

Introduction

BE1-50/51M overcurrent relays are microprocessor based, 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 or 60 Hz power systems. Models are available with fifteen 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.

BE1-50/51M 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

• Field selectable instantaneous or integrating reset

• Field selectable 50 or 60 Hz operation

• Field selectable fixed instantaneous delay (0.0, 0.1, 0.2, or 0.3 second on 100 series relays and

0.0 or 0.1 second on 200 series relays.).

Individual models are available for 1 ampere and 5 amperes sensing input currents. BE1-50/51M
overcurrent relays (both horizontal and vertical mounts) must be removed from the case and installed on
a test bench for testing. Shorting contacts are provided for all current inputs when the relay chassis is
removed from the relay case. Figure 1-1 shows the front panel of the BE1-50/51M overcurrent relay, in a
C1, horizontal mount case. Figure 1-2 shows the front panel of the BE1-50/51M overcurrent relay, in a
C1, vertical mount case. Internally (circuit wise), all relay models are the same and use the same circuit
assemblies.

Advantages

BE1-50/51M 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

9252000990 Rev R BE1-50/51M General Information 1-1

Figure 1-1. BE1-50/51M, C1 Horizontal Mount Case

Figure 1-2. BE1-50/51M, C1 Vertical Mount Case

1-2 BE1-50/51M General Information 9252000990 Rev R

Model Numbers

Model number variations in the BE1-50/51M overcurrent relays are specified by a three digit extension to
the model number. Tables 1-1 and 1-2 provide model number, case style, switch SW3-3 selections, and
sensing current input ranges. Internal switches provide for selecting system operating frequencies of 50
or 60 Hz, instantaneous element delays, curve sets, and instantaneous or integrating reset
characteristics. The location and description of these switches is provided in Section 2. Integrating reset is
available in 100 series relays (e.g. - BE1-50/51M-100) when there is adequate input current to power the
relay. Integrating reset is available in 200 series relays (e.g. - BE1-50/51M-200) even when the input
current falls to zero. Two-hundred series relays also have additional characteristic curves available
through curve set selection.

Table 1-1. BE1-50/51M Overcurrent Relays, One Ampere CT Secondary, 50/60 Hz

Model Number Case Style SW3-3 Selects

BE1-50/51M-100

BE1-50/51M-200

BE1-50/51M-108

BE1-50/51M-208

Table 1-2. BE1-50/51M Overcurrent Relays, Five Ampere CT Secondary, 50/60 Hz

Model Number Case Style SW3-3 Selects

BE1-50/51M-104 C1 (Horizontal Mount) 0.2 Second Delay 0.5 - 15.9 1.0 - 99.0

BE1-50/51M-204 C1 (Horizontal Mount) Curve Set 0.5 - 15.9 1.0 - 99.0

BE1-50/51M-109 C1 (Vertical Mount) 0.2 Second Delay 0.5 - 15.9 1.0 - 99.0

BE1-50/51M-209 C1 (Vertical Mount) Curve Set 0.5 - 15.9 1.0 - 99.0

NOTE: 100 series relays (e.g. - BE1-50/51M-104) have the integrating reset function when there is
adequate input current to power the relay. 200 series relays (e.g. - BE1-50/51M-204) have the integrating
reset function even when the input current falls to zero.

C1 (Horizontal Mount)

C1 (Horizontal Mount)

C1 (Vertical Mount)

C1 (Vertical Mount)

0.2 Second Delay 0.1 - 3.18 0.2 - 19.8

Curve Set 0.1 - 3.18 0.2 - 19.8

0.2 Second Delay 0.1 - 3.18 0.2 - 19.8

Curve Set 0.1 - 3.18 0.2 - 19.8

Sensing Input Range (Amps)

TIME INST

Sensing Input Range (Amps)

TIME INST

9252000990 Rev R BE1-50/51M General Information 1-3

Specifications

KBD

CM

AD

T

N

T

++=

-

BE1-50/51M overcurrent relays have the following features and capabilities.

Current Sensing Input

1 Ampere Unit

Continuous Current.................... 2.8 Aac

One Second Rating ................... 80 Aac

5 Ampere Unit

Continuous Current.................... 14 Aac

One Second Rating ................... 400 Aac

Time Overcurrent (51) Element

Setting the TIME PICKUP control at the minimum pickup setting (0.1 on the 1 ampere unit and 0.5 on the
5 ampere unit), places the relay in the most sensitive state and may be used as a safety setting.

1 Ampere Unit 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

5 Ampere Unit 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 for 5 ampere units, and ±2%, ±5 milliamperes for 1 ampere
units.

Timing Accuracy Example (5 Ampere Unit)

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: TT = time to trip in seconds
D = time dial setting
M = multiple of pickup setting
A, B, C, N, K = constants for the particular curve

1-4 BE1-50/51M General Information 9252000990 Rev R

Time characteristic curve constants are listed in Tables 1-3 and 1-4. 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 1-3. Time Characteristic Curve Constants with SW3-3 Open (Off)

(Series 100 or 200 Relays)

Curve Type ∗

BE1 Similar To A B C N K R

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

Curve Type ∗

BE1 Similar To A B C N K R

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

Figure

Number †

(Series 200 Relays)

Figure

Number †

Constants

Constants

Notes for Tables 1-3 and 1-4

∗ 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.

9252000990 Rev R BE1-50/51M General Information 1-5

Integrating Reset

1−

=

2

R

M

RD

T

Where:

M = Current in multiples of PICKUP setting during reset

1.0

10.0

100.0

0.000 0.200 0.400 0.600 0.800 1.000 1.200

Multiple of Pickup

xRD (Seconds)

P0046-11

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).

Reset begins when the current drops below 95% of pickup and the relay has not timed out. Switch SW3-4
provides selection of either an instantaneous or integrating reset characteristic. Opening SW3-4 forces
the instantaneous reset timer to zero when timed dropout occurs. This fast reset characteristic prevents
the ratcheting effect that may occur with repeating system faults. Closing SW3-4 selects the integrating
reset characteristic. The integrating reset characteristic simulates the disk reset of electromechanical
relays. When the integrating reset characteristic is selected on 100 series relays, insure that sufficient
input power is available to power up the relay. This is not required on Series 200 relays. Series 200 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 1-3. Equation
constants are provided in Tables 1-3 or 1-4.

Integrating Reset Equation:

TR = Time to reset in seconds
R = Constant for the particular curve
D = TIME DIAL setting

Figure 1-3. Integrating Reset Characteristic Curve

Instantaneous Overcurrent (50) Element

Setting the INST PICKUP to the minimum pickup (0.2 on the 1 ampere unit and 1.0 on the 5 ampere unit),
places the relay in the most sensitive state and may be used as a safety setting.

1 Ampere Unit 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

5 Ampere Unit Pickup

Setting Range ............................ 1 to 99 Aac

Setting Increment ....................... 1 Aac

Accuracy .................................... ±2%, ±25 milliamperes at or above 1.0 ampere setting

1-6 BE1-50/51M General Information 9252000990 Rev R

Dropout

Dropout occurs at 95% of pickup value.

Curve Characteristics

BE1-50/51M instantaneous characteristic curves are similar to standard electromechanical instantaneous
units. However, the time to trip for ground applications is slightly longer than that for phase applications to
allow time to power up the relay. Longer trip time for ground applications is beneficial because it helps to
avoid nuisance trips.

For phase applications, the maximum time to trip is 3.5 cycles at a pickup multiple of 1.0, and 1.5 cycles
at a pickup multiple of 3.0. The corresponding times for ground applications are 4.5 and 1.75 cycles.
Figure 1-4 shows the instantaneous characteristic curves for maximum time to trip.

On 100 series relays, additional delays of 0.1, 0.2, or 0.3 seconds may be added with internal switches
SW3-2 and SW3-3. These delays apply to both phase and ground applications. Closing switch SW3-2
provides an additional delay of 0.1 second. Closing switch SW3-3 provides an additional delay of 0.2
second. Closing both switches SW3-2 and SW3-3 provides an additional delay of 0.3 second. Section 2
illustrates the location of SW3.

On 200 series relays, an additional 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 the additional delay
of 0.1 second.

Figure 1-4. Instantaneous Characteristic Curves

9252000990 Rev R BE1-50/51M General Information 1-7

Burden

Burden is non-linear. Figure 1-5 illustrates the device burden.

1 Ampere Unit

0.1 amperes ............................... 120 Ω

1.0 ampere ................................. 5 Ω

5 Ampere Unit

0.5 amperes ............................... 4.8 Ω

5.0 amperes ............................... 0.2 Ω

Figure 1-5. Burden Characteristics

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.

1-8 BE1-50/51M General Information 9252000990 Rev R

Harmonic Response

Figure 1-6 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.

Figure 1-6. Harmonic Rejection

Target Indicators

Gravity latched, 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 specifications for maximum current rating.

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).

AUX Output Contact

The AUX Output contact can be configured in the field using jumpers to select closing on either timed or
instantaneous trip. The AUX output contact is surge protected and has the same ratings as the output
contacts above.

9252000990 Rev R BE1-50/51M General Information 1-9

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°C to 70°C (–40°F to158°F)

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

Agency Recognition

UL Recognized/CSA Certified

UL Recognized per Standard 508, UL File No. E97033. CSA Certified per Standard CAN/CSA-C22.2 No.
14-M91, CSA File No. LR 23131.

Note: Output contacts are not UL Recognized/CSA Certified for voltages greater than 250 volts.

GOST-R Certification

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

Physical

Weight ........................................ 5.2 lb (2.36 kg)

Patent

Patented in U.S., 1998, U.S. Patent No. 5751532.

1-10 BE1-50/51M General Information 9252000990 Rev R

SECTION 2 • CONTROLS AND INDICATORS

TABLE OF CONTENTS

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

Introduction ............................................................................................................................................ 2-1

Figures

Figure 2-1. Location of Controls and Indicators ........................................................................................ 2-1

Figure 2-2. Location of SW3 and Auxiliary Output Jumper Terminations

Tables

Table 2-1. BE1-50/51M Controls and Indicators (Refer to Figures 2-1 and 2-2) ...................................... 2-3

................................................. 2-2

9252000990 Rev R BE1-50/51M Controls and Indicators i

ii BE1-50/51M Controls and Indicators 9252000990 Rev R

SECTION 2 • CONTROLS AND INDICATORS

Introduction

Figure 2-1 illustrates the front panel controls and indicators of the BE1-50/51M. 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. Location of Controls and Indicators

9252000990 Rev R BE1-50/51M Controls and Indicators 2-1

P0053-49

J

K

Figure 2-2. Location of SW3 and Auxiliary Output Jumper Terminations

2-2 BE1-50/51M Controls and Indicators 9252000990 Rev R

Table 2-1. BE1-50/51M 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 CURVE Selector

F TIME DIAL Selectors

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 on five ampere models,
COARSE and FINE on one ampere models) 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 (TENS and UNITS on five ampere models,
COARSE and FINE on one ampere models) to select pickup
current in amperes. Changing switch selectors while the relay is in
service may cause tripping.

Ten position selector switch to select one of nine inverse functions
or one fixed time function.

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

I Target RESET Button

This bicolor LED indicates the level of current sensed by the relay.
A green LED indicates that the relay is active but not picked up.
The LED changes to red when the sensed current exceeds the
time overcurrent pickup setting and back to green when the
sensed current decreases below 95% of the time overcurrent
pickup setting.

Note: A minimum of 0.5 A (5A units) or 0.1 A (1A units) is required
to light the LED. The LED may not turn green (active) before
turning red (picked up) at the 0.5 A pickup setting on 5A units or

0.1 A pickup setting on 1A units.

Linkage extends through back of front cover to reset both gravity
latched target indicators.

9252000990 Rev R BE1-50/51M Controls and Indicators 2-3

Locator Control or Indicator Function

J SW3-1

SW3-2

SW3-3

SW3-4

K

Auxiliary Output
Jumper Terminations

SW3-1 selects the system operating frequency. Opening SW3-1
(OFF) selects 60 hertz operation. Closing SW3-1 (ON) selects 50
hertz operation.

SW3-2 selects additional delay for the instantaneous element.
Closing SW3-2 (ON) provides an additional instantaneous delay of

0.1 seconds.

100 Series Relays

Closing SW3-3 (ON) provides an additional instantaneous delay of

0.2 seconds. Closing both SW3-2 (ON) and SW3-3 (ON) provides
an additional instantaneous delay of 0.3 seconds.

200 Series Relays

Opening SW3-3 (OFF) selects ABB type curves (refer to Table 1-

3.) Closing SW3-3 (ON) selects GE IAC type curves (refer to
Table 1-4).

SW3-4 provides selection of either instantaneous or integrating
reset characteristics. Closing SW3-4 (ON) selects integrating reset
characteristics. Opening SW3-4 (OFF) selects instantaneous reset
characteristics. See Section 1, General Information,
Specifications, for details on time reset.

Configures the auxiliary output contacts to close with either the
instantaneous (50) trip and/or the timed (51) trip.

Jumper E2 to E1A to close the auxiliary contact with the timed (51)
trip. This jumper is yellow and factory installed to close the
auxiliary output contacts with the timed trip.

Jumper E3 to E1B to close the auxiliary contact with the
instantaneous (50) trip. This jumper is blue and factory installed to
close the auxiliary output contacts with the instantaneous trip.

Users with BE1-50/51B unit revisions Q, R, and S in 100 series
relays and unit revisions H and previous in 200 series relays, refer
to Section 6 for the location of the auxiliary output jumper
terminations and the location of SW3. (Note: In all previous
revisions, the reference designator for SW3 was SW8.)

2-4 BE1-50/51M Controls and Indicators 9252000990 Rev R

SECTION 3 • FUNCTIONAL DESCRIPTION

TABLE OF CONTENTS

SECTION 3 • FUNCTIONAL DESCRIPTION ........................................................................................... 3-1

General .................................................................................................................................................. 3-1

Functional Description ........................................................................................................................... 3-1

Sensing Input ..................................................................................................................................... 3-1

Power Supply ..................................................................................................................................... 3-1

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

Time Signal ........................................................................................................................................ 3-1

Microprocessor ................................................................................................................................... 3-1

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

Outputs ............................................................................................................................................... 3-1

Figures

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

9252000990 Rev R BE1-50/51M Functional Description i

ii BE1-50/51M Functional Description 9252000990 Rev R

SECTION 3 • FUNCTIONAL DESCRIPTION

General

BE1-50/51M 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 8 and 9. Refer to Figure 3-1 to follow the functional description. The input current is applied to
internal power and signal CTs.

Power Supply

Current from the power CT is rectified, filtered, and supplied to all relay internal circuitry for operating
power. A precision +5 Vdc supply also serves as a reference for automatic calibration.

Instantaneous Signal

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

Current from the signal CT is also rectified and applied to the time scaling resistors controlled by the TIME
PICKUP selector switches. The analog voltage of the time input signal is also filtered and applied to the
multiplexor.

Microprocessor

Operating power from the power supply is applied to the microprocessor supervisor circuit. When the
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, INST DELAY
switches, and RESET CHAR switch 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. The TIME (51) contact is closed in accordance with the TIME characteristic equation. If
the sensed current exceeds the INST PICKUP setting, the INST contact (50) is closed.

Power-Off Sensing

In 200 series relays, power-off sensing circuits measure the decaying voltage to determine the length of
time that power is removed (zero current). This provides information for the integrating reset function even
when power has been entirely removed.

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.

9252000990 Rev R BE1-50/51M Functional Description 3-1

CAUTION

POWER

CT SUPPLY

POWER

BRIDGE

CT

SIGNAL

TIME

SCALE

INST

SCALE

MUX

SW SW SW SW

TIME

PICKUP

INST

PICKUP

SWSW

SW

DOG

WATCH

SUPERVISOR

MICRO

51

50

TIME
DIAL

TIME

CURVE

50/60 Hz

INST DELAY

TP

TP

AUX

ISOLATION

TARGETS

MAGNETIC

ACTIVE/PICKUP

51

50

INPUT

GND

D1181-09

2

3

6

5

4

7

8

9

AND

A/D

CONVERTER

POWER-OFF

SENSING

SERIES 200 RELAYS ONLY

SW

RESET CHAR.

51

50

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.

Auxiliary

The auxiliary output contacts can be configured by the user to close when the timed and/or instantaneous
trip occurs. With both jumpers installed (this is the factory setting) either the timed or instantaneous trip
closes the auxiliary contacts. Effective with unit revision R, in units 9252000100 through 9252000109, the
printed circuit board was changed. Now, the PCB for 100 and 200 series relays are similar. Users with
units before revision R may see Section 6, Relay Differences, for installing auxiliary output contact
jumpers.

Figure 3-1. Functional Block Diagram

3-2 BE1-50/51M Functional Description 9252000990 Rev R

SECTION 4 • INSTALLATION

TABLE OF CONTENTS

SECTION 4 • INSTALLATION .................................................................................................................. 4-1

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

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

Connections ........................................................................................................................................... 4-3

Maintenance........................................................................................................................................... 4-7

Storage ................................................................................................................................................... 4-7

Figures

Figure 4-1. Rack Mounting Plate, Part Number 9252012001 ................................................................... 4-1

Figure 4-2. Outline Dimensions
Figure 4-3. Panel Drilling Diagram, C1 Case
Figure 4-4. AC Input Connections
Figure 4-5. DC Control Connections
Figure 4-6. BE1-50/51M Terminal Connections, Rear View

................................................................................................................. 4-2

............................................................................................ 4-3

............................................................................................................. 4-4

......................................................................................................... 4-5

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

9252000990 Rev R BE1-50/51M Installation i

ii BE1-50/51M Installation 9252000990 Rev R

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

A rack mounting plate (part number 9252012001) can be purchased to mount four BE1-50/51M (vertical
mount) relays side-by-side in a standard 19 inch wide rack. The rack mounting plate is four rack units
(seven inches) high and is shown in Figure 4-1. A cover (part number 9252012101) is also available that
covers one mounting location. Relay outline dimensions and panel drilling diagrams are shown in Figures
4-2 and 4-3.

Figure 4-1. Rack Mounting Plate, Part Number 9252012001

9252000990 Rev R BE1-50/51M Installation 4-1

BS142 EXTREMELY INVERSEC

BS142 VERY INVERSE

B

F

FIXED TIME

E

EXTREMELY INVERSEDEFINITE TIME

D

MODERATELY INVERSE

M

I

INVERSE

V

VERY INVERSELONG INVERSEL

SHORT INVERSE

S

CURVE DEFINITIONS

OVERCURRENT

9 8 7 6

5

4

3

2

CT

AUX

GND

51

50

.850

5.950

7.000

4.000

6.875

5.625

6.250

.312

.315

.550

2.900

3.395

.500

(TYP)

(TYP)

.420

D1047-04

000S00

0

RESET

ACTIVE/PICKUP

PICKUP

(0.5 MIN. SET)

TIME DIAL

TENTHSUNITS

++

TENTHSUNITS CURVE

+

UNITSTENS

INSTTIME

PICKU

P

MANUAL TRIP

Trip Volt. Present

INST

Trip Volt. Present

TIM

E

MANUAL TRIP

R

Overcurrent
Relay

BE1-50/51B-XXX

Basler

Figure 4-2. Outline Dimensions

4-2 BE1-50/51M Installation 9252000990 Rev R

Figure 4-3. Panel Drilling Diagram, C1 Case

When the relay is configured in a system with other devices, it is

Connections

Incorrect wiring may result in damage to the relay. Be sure to check model and part number before
connecting and energizing a particular relay.

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.

recommended to use a separate lead to the ground bus from each unit.

9252000990 Rev R BE1-50/51M Installation 4-3

Connections should be made with minimum wire size of 14 AWG except as noted for the ground wire.
Typical ac input and dc control connections are shown in Figures 4-4 and 4-5. The auxiliary output jumper
configuration schematic diagram is also shown in Figure 4-5. Relay internal connections are shown on the
back of the relay. Figure 4-6 shows a rear view of the relay and the connections.

Figure 4-4. AC Input Connections

4-4 BE1-50/51M Installation 9252000990 Rev R

Figure 4-5. DC Control Connections

9252000990 Rev R BE1-50/51M Installation 4-5

Figure 4-6. BE1-50/51M Terminal Connections, Rear View

4-6 BE1-50/51M Installation 9252000990 Rev R

Maintenance

BE1-50/51M 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.

9252000990 Rev R BE1-50/51M Installation 4-7

4-8 BE1-50/51M Installation 9252000990 Rev R

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 for Five Ampere Units ............................................................................................... 5-3

TIME Pickup Test ........................................................................................................................... 5-3

INST Pickup Test ............................................................................................................................ 5-3

Time Dial Test ................................................................................................................................. 5-3

Integrating Reset Test (Applicable Only to 200 Series Relays) ..................................................... 5-4

Target Test ..................................................................................................................................... 5-4

Manual Trip Test ............................................................................................................................. 5-4

Test Procedure for One Ampere Units ............................................................................................... 5-5

TIME Pickup Test ........................................................................................................................... 5-5

INST Pickup Test ............................................................................................................................ 5-5

Time Dial Test ................................................................................................................................. 5-6

Integrating Reset Test (Applicable Only to 200 Series Relays) ..................................................... 5-6

Target Test ..................................................................................................................................... 5-6

Manual Trip Test ............................................................................................................................. 5-7

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

9252000990 Rev R BE1-50/51M Testing i

ii BE1-50/51M Testing 9252000990 Rev R

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 C37.90-2005, 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 BE1-50/51M relays. The test setups 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

When testing units with integrating reset characteristics selected, timing may
be affected by the integrating reset.

9252000990 Rev R BE1-50/51M Testing 5-1

BE1-50/51M

9 8 7 6 5 4 2

TIME INST

3

CURRENT
SOURCE

INPUT

STOP

TIMER

START

AMPS

TEST SET

D2750-21

R

AC or DC

Voltage

Source

(V)

1 A Target Current

R = V/1
Rwatts = 1*V

Figure 5-1. Pickup and Timing Test Setup

5-2 BE1-50/51M Testing 9252000990 Rev R

Figure 5-2. Target Operational Test Setup

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 for Five Ampere Units

TIME Pickup Test

Perform preliminary setup:

• Connect test setup as shown in Figure 5-1.

• Ensure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type
curves selected (200 series relays)), and SW3-4 to OFF (selects instantaneous reset).

• 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 8 and 9. ACTIVE/PICKUP LED should turn RED at a

maximum input current of 0.550 ampere.

Step 2. Decrease input current until ACTIVE/PICKUP LED turns GREEN then OFF.

Step 3. Set TIME PICKUP to 2.2.

Step 4. Slowly increase current to terminals 8 and 9. ACTIVE/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 ACTIVE/PICKUP LED turns GREEN then OFF.

INST Pickup Test

Perform preliminary setup:

• Connect test setup as shown in Figure 5-1.

• Ensure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type
curves selected (200 series relays)), and SW3-4 to OFF (selects instantaneous reset).

• Set TIME DIAL to 0.0.

• Set CURVE to S

• Set TIME PICKUP to 15.1.

• Set INST PICKUP to 01.

Step 1. Slowly increase current to terminals 8 and 9. 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 8 and 9. 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.

• Ensure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type
curves selected (200 series relays)), and SW3-4 to OFF (selects instantaneous reset).

• Set TIME DIAL to 4.5.

• Set CURVE to S

9252000990 Rev R BE1-50/51M Testing 5-3

• Set TIME PICKUP to 1.0.

• Set INST PICKUP to 90.

Step 1. Prepare to apply 1.5 amperes input current to terminals 8 and 9 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 1.754 to 2.084 seconds. (This tolerance is greater than ±2 % because it is the accumulation of
both pickup and timing tolerances.)

Step 3. Remove input current.

Integrating Reset Test (Applicable Only to 200 Series Relays)

Perform preliminary setup:

• Connect test setup as shown in Figure 5-1.

• Ensure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type
curves selected (200 series relays)), and SW3-4 to ON (selects integrating reset).

• Set TIME DIAL to 4.5.

• Set CURVE to I.

• 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 8 and 9. After the unit trips, remove the input current

for 20 ±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 1.55 ±0.3 seconds.

Target Test

Perform preliminary setup:

• Connect test setup as shown in Figure 5-2.

• Ensure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type
curves selected (200 series relays)), and SW3-4 to OFF (selects instantaneous reset).

• Set TIME DIAL to 4.5.

• Set CURVE to S

• Set TIME PICKUP to 1.0.

• Set INST PICKUP to 01.

Step 1. Set voltage source to provide a target current of 1.0 ampere.

Step 2. Apply 5 amperes input current to terminals 8 and 9. Check that both TIME and INST targets

operate.

Step 3. Remove input current and reset targets.

Manual Trip Test

Perform preliminary setup:

• Connect test setup as shown in Figure 5-2.

• Ensure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type
curves selected (200 series relays)), and SW3-4 to OFF (selects instantaneous reset).

• Set TIME DIAL to 4.5.

• Set CURVE to S

• Set TIME PICKUP to 1.0.

• Set INST PICKUP to 01.

5-4 BE1-50/51M Testing 9252000990 Rev R

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 8 and 9.

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.

Test Procedure for One Ampere Units

TIME Pickup Test

Perform preliminary setup:

• Connect test setup as shown in Figure 5-1.

• Ensure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type
curves selected (200 series relays)), and SW3-4 to OFF (selects instantaneous reset).

• Set TIME DIAL to 0.0.

• Set CURVE to S

• Set TIME PICKUP to 0.1.

• Set INST PICKUP to 18.0.

Step 1. Slowly increase current to terminals 8 and 9. ACTIVE/PICKUP LED should turn RED at a

maximum input current of 0.11 ampere.

Step 2. Decrease input current until ACTIVE/PICKUP LED turns GREEN then OFF.

Step 3. Set TIME PICKUP to 0.44.

Step 4. Slowly increase current to terminals 8 and 9. ACTIVE/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 ACTIVE/PICKUP LED turns Green then OFF.

INST Pickup Test

Perform preliminary setup:

• Connect test setup as shown in Figure 5-1.

• Ensure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type
curves selected (200 series relays)), and SW3-4 to OFF (selects instantaneous reset).

• Set TIME DIAL to 0.0.

• Set CURVE to S

• Set TIME PICKUP to 3.02.

• Set INST PICKUP to 0.2.

Step 1. Slowly increase current to terminals 8 and 9. 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 1.6.

Step 4. Slowly increase current to terminals 8 and 9. 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.

9252000990 Rev R BE1-50/51M Testing 5-5

Time Dial Test

Perform preliminary setup:

• Connect test setup as shown in Figure 5-1.

• Ensure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type
curves selected (200 series relays)), and SW3-4 to OFF (selects instantaneous reset).

• Set TIME DIAL to 4.5.

• 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 8 and 9 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 1.754 to 2.084 seconds. (This tolerance is greater than ±2 % because it is the accumulation of
both pickup and timing tolerances.)

Step 3. Remove input current.

Integrating Reset Test (Applicable Only to 200 Series Relays)

Perform preliminary setup:

• Connect test setup as shown in Figure 5-1.

• Ensure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type
curves selected (200 series relays)), and SW3-4 to ON (selects integrating reset).

• Set TIME DIAL to 4.5.

• Set CURVE to I.

• Set TIME PICKUP to 0.2.

• 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 ampere input current to terminals 8 and 9. After the unit trips, remove the input current

for 20 ±0.25 seconds, then reapply the 0.8 ampere 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.

Target Test

Perform preliminary setup:

• Connect test setup as shown in Figure 5-2.

• Ensure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type
curves selected (200 series relays)), and SW3-4 to OFF (selects instantaneous reset).

• Set TIME DIAL to 4.5.

• Set CURVE to S

• Set TIME PICKUP to 0.2.

• Set INST PICKUP to 0.2.

Step 1. Set voltage source to provide a target current of 1.0 ampere.

Step 2. Apply 1 ampere input current to terminals 8 and 9. Check that both TIME and INST targets

operate.

Step 3. Remove input current and reset targets.

5-6 BE1-50/51M Testing 9252000990 Rev R

Manual Trip Test

Perform preliminary setup:

• Connect test setup as shown in Figure 5-2.

• Ensure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type
curves selected (200 series relays)), and SW3-4 to OFF (selects instantaneous reset).

• 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 8 and 9.

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.

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 BE1-50/51M 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

Periodic testing should consist of the following procedures.

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

when the INST output contacts close.

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

LED turns GREEN then RED.

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

the time given on the characteristic curve. Refer to Appendix A for the characteristics curves.

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

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

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

can be reset using the RESET BUTTON.

9252000990 Rev R BE1-50/51M Testing 5-7

5-8 BE1-50/51M Testing 9252000990 Rev R

SECTION 6 • RELAY DIFFERENCES

TABLE OF CONTENTS

SECTION 6 • RELAY DIFFERENCES ...................................................................................................... 6-1

General .................................................................................................................................................. 6-1

Differences ............................................................................................................................................. 6-1

Figures

Figure 6-1. Location of Controls and Indicators for unit revision Q and Previous, 100 Series Relays ..... 6-2

Figure 6-2. Location of Controls and Indicators for Unit Revisions R and S, 100 Series Relays and Unit
Revisions H and Previous, 200 Series Relays

.......................................................................................... 6-3

9252000990 Rev R BE1-50/51M Relay Differences i

ii BE1-50/51M Relay Differences 9252000990 Rev R

SECTION 6 • RELAY DIFFERENCES

General

This section provides the information necessary to support BE1-50/51M 100 series relays, revision S and
previous. In all unit revisions S and previous SW3 is the same as SW8.

Differences

BE1-50/51M 100 series relay boards revision Q and previous have the locations for controls and
indicators shown in Figure 6-1. BE1-50/51M 100 series relays, unit revisions R and S and 200 series
relays, unit revisions H and previous have the locations for controls and indicators shown in Figure 6-2.
Table 6-1 lists and briefly describes the operator controls of these relays. Reference the callout letters to
Figures 6-1 and 6-2.

Table 6-1. BE1-50/51M Controls and Indicators for 100 Series Relays Revision Q and Previous

Locator

J SW8-1

K

Control or

Auxiliary Output

Terminations

Indicator

SW8-2

SW8-3

SW8-4

Jumper

Function

SW8-1 selects the system operating frequency. SW8-1 open (OFF)
selects 60 hertz operation. SW8-1 closed (ON) selects 50 hertz
operation.

In 100 and 200 series relays,
instantaneous element. Switch SW8-2 closed (ON) provides an
additional instantaneous delay of 0.1 seconds.

In 100 series relays, switch SW8-3 closed (ON) provides an
additional instantaneous delay of 0.2 seconds. Closing both switches
SW8-2 and SW8-3 provides an additional instantaneous delay of 0.3
seconds.

In 200 series relays,
(refer to Table 1-3). SW8-3 closed (ON) selects GE IAC type curves
(refer to Table 1-4).

Provides selection of either instantaneous or integrating reset
characteristic. SW8-4 closed (ON) provides integrating reset. SW8-4
open (OFF) provides instantaneous reset.

Configures the auxiliary output contacts to close with either the
instantaneous (50) trip and/or the timed (51) trip.

Jumper E2 to E1A to close the auxiliary contact with the timed (51)
trip. This jumper is yellow and factory installed to close the auxiliary
output contacts with the timed trip.

Jumper E3 to E1B to close the auxiliary contact with the
instantaneous (50) trip. This jumper is blue and factory installed to
close the auxiliary output contacts with the instantaneous trip.

SW8-3 open (OFF) selects ABB type curves

SW8-2 selects additional delay for the

9252000990 Rev R BE1-50/51M Relay Differences 6-1

Figure 6-1. Location of Controls and Indicators for unit revision Q and Previous, 100 Series Relays

6-2 BE1-50/51M Relay Differences 9252000990 Rev R

J

D1181-08

K

1

ON

432

+

+

+

+

+

CR17

U7

Q2

W2

1 A

1

1

1

1 1

1

6

5

1

4

K3

C10

CR1CR4

C26

C27 C28

C29

C30

SW2

SW1

SW4SW3SW5SW6SW7

AR4 AR3

AR5

AR6

AR2

TPG

TP3

TP2

TP1

T2

P1

K1

K2

C12

C11

C14

R16

W3

AR1

C51

C3

E2E3

E1A

R17

E1B

C13

DS3DS2

T1

W4 W5

W6

W7

W8

CR19/C39

CR18/C38

4

1

4

1

ON

KA

R19

C9

C8

C5

C4

C52

C45

R33

R18

R5

R3

R6

R38

R14

Q1

R34

CR12

VR3

CR11

CR13

VR4

CR16

CR15

CR14

VR1

VR2

CR3

CR5

CR2

U9

CR10

U3

U8

R13

U15

SW8

U10

U12

U11

U13

U6

U4

U1

U2

CR9

U5

R15

U5

SW8

ON

AR3

2 3 4

ON

1

Y1

1

CR20/C40

W7

T1

E1B

E1A

E3 E2

K3

K4

Figure 6-2. Location of Controls and Indicators for Unit Revisions R and S, 100 Series Relays and Unit

Revisions H and Previous, 200 Series Relays

9252000990 Rev R BE1-50/51M Relay Differences 6-3

6-4 BE1-50/51M Relay Differences 9252000990 Rev R

APPENDIX A • TIME CHARACTERISTIC CURVES

TABLE OF CONTENTS

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

Time 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)
Figure A-3. Time Characteristic Curve, D-Definite Time (Similar to ABB CO-6)
Figure A-4. Time Characteristic Curve, M-Moderately Inverse (Similar to ABB CO-7)
Figure A-5. Time Characteristic Curve, I-Inverse (SW3-3 OFF, Similar to ABB CO-8)
Figure A-6. Time Characteristic Curve, V-Very Inverse (SW3-3 OFF, Similar to ABB CO-9)
Figure A-7. Time Characteristic Curve, E-Extremely Inverse (SW3-3 OFF, Similar to ABB CO-11)
Figure A-8. Time Characteristic Curve, BS142-B (BS142 Very Inverse)
Figure A-9. Time Characteristic Curve, BS142-C (BS142 Extremely Inverse)
Figure A-10. Time Characteristic Curve, S2-Short Inverse (SW3-3 ON, Similar to GE IAC 55)
Figure A-11. Time Characteristic Curve, L2-Long Inverse (SW3-3 ON, Similar to GE IAC 66)
Figure A-12. Time Characteristic Curve, I2-Inverse (SW3-3 ON, Similar to GE IAC 51)
Figure A-13. Time Characteristic Curve, V2-Very Inverse (SW3-3 ON, Similar to GE IAC 53)
Figure A-14. Time Characteristic Curve, E2-Extremely Inverse (SW3-3 ON, Similar to GE IAC 77)

.................. A-2

...................................... A-3

............................. A-4

........................... A-5

................. A-6

........ A-7

.................................................. A-8

......................................... A-9

............. A-10

.............. A-11

........................ A-12

.............. A-13

..... A-14

9252000990 Rev R BE1-50/51M Time Characteristic Curves i

ii BE1-50/51M Time Characteristic Curves 9252000990 Rev R

APPENDIX A • TIME CHARACTERISTIC CURVES

Time Characteristic Curves

Figures A-1 through A-9 illustrate the time characteristic curves that are programmed into the nonvolatile
memory of series 100 relays. Figures A-1 through A-14 illustrate the characteristic curves that are
programmed into the nonvolatile memory of series 200 relays.

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

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

9252000990 Rev R BE1-50/51M Time Characteristic Curves A-1

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

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

A-2 BE1-50/51M Time Characteristic Curves 9252000990 Rev R

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

(Similar to ABB CO-6)

9252000990 Rev R BE1-50/51M Time Characteristic Curves A-3

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

(Similar to ABB CO-7)

A-4 BE1-50/51M Time Characteristic Curves 9252000990 Rev R

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

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

9252000990 Rev R BE1-50/51M Time Characteristic Curves A-5

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

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

A-6 BE1-50/51M Time Characteristic Curves 9252000990 Rev R

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

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

9252000990 Rev R BE1-50/51M Time Characteristic Curves A-7

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

(BS142 Very Inverse)

A-8 BE1-50/51M Time Characteristic Curves 9252000990 Rev R

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

(BS142 Extremely Inverse)

9252000990 Rev R BE1-50/51M Time Characteristic Curves A-9

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

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

A-10 BE1-50/51M Time Characteristic Curves 9252000990 Rev R

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

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

9252000990 Rev R BE1-50/51M Time Characteristic Curves A-11

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

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

A-12 BE1-50/51M Time Characteristic Curves 9252000990 Rev R

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

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

9252000990 Rev R BE1-50/51M Time Characteristic Curves A-13

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

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

A-14 BE1-50/51M Time Characteristic Curves 9252000990 Rev R

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