Basler BE1-50/51B-229 User manual

INSTRUCTION MANUAL
FOR
OVERCURRENT RELAY
BE1-50/51B-229
Publication: 9252000892
Revision: A 03/08

9252000892 Rev A BE1-50/51B-229 Introduction i
INTRODUCTION
This instruction manual provides information about the operation and installation of the BE1-50/51B-229
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.

ii BE1-50/51B-229 Introduction 9252000892 Rev A
First Printing: June 2003
Printed in USA
© 2008 Basler Electric, Highland Illinois 62249 USA
All Rights Reserved
March 2008
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
ROUTE 143, BOX 269
HIGHLAND IL 62249 USA
http://www.basler.com, [email protected]
PHONE [phone] FAX [phone]
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.

9252000892 Rev A BE1-50/51B-229 Introduction iii
REVISION HISTORY
The following information provides a historical summary of the changes made to this instruction manual
(9252000892). Revisions are listed in reverse chronological order.
Manual
Revision and Date Change
A, 03/08 •Updated front panel drawings.
•Added publication number and revision level to the footer of each
page.
•Added GOST-R to Section 1.
—, 06/03 •Initial release

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9252000892 Rev A BE1-50/51B-229 Introduction v
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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9252000892 Rev A BE1-50/51B-229 General Information i
SECTION 1 •GENERAL INFORMATION
TABLE OF CONTENTS
SECTION 1 •GENERAL INFORMATION ................................................................................................1-1
INTRODUCTION....................................................................................................................................1-1
FEATURES............................................................................................................................................1-1
Advantages.........................................................................................................................................1-1
APPLICATION .......................................................................................................................................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
Patent.................................................................................................................................................1-8
Figures
Figure 1-1. Integrating Reset Characteristic Curve...................................................................................1-4
Figure 1-2. Instantaneous Characteristic Curves......................................................................................1-5
Figure 1-3. Harmonic Rejection.................................................................................................................1-7
Figure 1-4. BE1-50/51B-229 Burden Characteristics................................................................................ 1-6
Tables
Table 1-1. Type SFC 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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9252000892 Rev A BE1-50/51B-229 General Information 1-1
SECTION 1 •GENERAL INFORMATION
INTRODUCTION
BE1-50/51B-229 Overcurrent Relays are self-powered, microprocessor-based, non-directional phase or
ground relays that monitor single-phase ac current and provide accurate instantaneous and time-over-
current protection for 50 or 60 Hz power systems.
BE1-50/51B-229 relays are direct replacements for General Electric Type SFC relays. BE1-50/51B relays
offer true plug and play convenience; they can be installed in an existing SFC relay case with no wiring
changes required. Table 1-1 lists the SFC relays that can be replaced by the BE1-50/51B-229.
Table 1-1. Type SFC Relays Suitable for Direct Replacement
SFC Model Time Curve Type Output Contact Circuits
SFC151∗∗A Inverse 1
SFC153∗∗A Very Inverse 1
SFC177∗∗A Extremely Inverse 1
∗Represents any allowed character per GE publication GEK-36807.
An existing SFC relay is replaced with a BE1-50/51B-229 relay by performing the following simple steps.
1. Configure your new BE1-50/51-229 relay with the desired settings.
2. Remove the existing SFC relay.
3. Attach the cover adapter plate to the existing case.
4. Insert the BE1-50/51B-229 relay into the case.
5. Install the existing SFC connection plug.
6. Install the new Basler Electric relay cover.
FEATURES
BE1-50/51B-229 Overcurrent Relays have the following standard features.
•Independent time and instantaneous elements
•Secure breaker tripping from 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
•Gravity latching targets retain indication without power
•Built-in accuracy eliminates internal adjustments
•Minimum transient overreach
•Field-selectable characteristic curves similar to either GE IAC or ABB type curves
•Field-selectable instantaneous or integrating reset function
•Field-selectable 50 or 60 Hz operation
•Field-selectable 0.0 or 0.1 second fixed, instantaneous time delay
Advantages
BE1-50/51B-229 Overcurrent Relays have many advantages over other overcurrent relays. The primary
advantages are listed below.
•Time characteristics are defined by equations and graphs
•Field-selectable time characteristics
•Very low burden extends the linear range of the system CTs
•Self-powered from the sensed current
•Continuous automatic calibration

1-2 BE1-50/51B-229 General Information 9252000892 Rev A
APPLICATION
The BE1-50/51B-229 has a wide range of pickup settings and front panel selectable time characteristics.
This makes the relay compatible with applications involving coordination with fuses, reclosers, cold-load
pickup, motor starting, and fixed time requirements. Two switch-selectable reset functions are provided:
instantaneous and integrating. The instantaneous reset function avoids ratcheting. The integrating reset
function simulates the disk reset characteristic of electromechanical relays.
SPECIFICATIONS
BE1-50/51B-229 electrical and physical specifications are listed in the following paragraphs.
Current Sensing Input
Nominal Rating: 5 Aac
Continuous Rating: 14 Aac
One-Second Rating: 400 Aac
Time Overcurrent (51) Element
Setting the TIME PICKUP control at the minimum pickup setting places the relay in the most sensitive
state and may be used as a safety setting.
Pickup
Setting Range: 0.5 to 15.9 Aac
Setting Increment: 0.1 Aac
Accuracy: ±2%, ±25 mAac at or above 0.5 Aac 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 percent over the range of 1.3 to 40 times tap. This
accuracy is for a given measured multiple of tap. The measurement of the multiple of tap has an accuracy
that is the sum of ±2 percent, ±25 milliamperes.
Timing Accuracy Example
Pickup Setting: 5 Aac
Current Applied: 6.5 Aac
+Multiple Tolerance: 6.655 Aac
−Multiple Tolerance: 6.345 Aac
Time Curve: E
Time Dial: 5.0
Minimum Time (6.655 Aac): 46.5470 sec
Maximum Time (6.345 Aac): 61.3968 sec
Curve Time (6.5 Aac): 53.1800 sec
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
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.
KBD
CM
AD
TN
T++= -

9252000892 Rev A BE1-50/51B-229 General Information 1-3
Table 1-2. Time Characteristic Curve Constants with SW3-3 Open (Off)
Curve Type ∗Constants
BE1 Similar To Figure
Number †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 1-3. Time Characteristic Curve Constants with SW3-3 Closed (On)
Curve Type ∗Constants
BE1 Similar To Figure
Number †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
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 decreases below 95 percent of pickup. Integrating reset simulates the disk
reset of electromechanical relays. BE1-50/51B-229 relays provide the integrating reset function even
when input current decreases to zero.
Integrating reset characteristics are defined by the following equation and shown in Figure 1-1. Equation
constants are listed in Tables 1-2 and 1-3.

1-4 BE1-50/51B-229 General Information 9252000892 Rev A
Where: 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
Figure 1-1. Integrating Reset Characteristic Curve
Instantaneous Overcurrent (50) Element
Setting the INST PICKUP control at 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 mAac at or above 1.0 Aac setting
Dropout
Dropout occurs at 95% of pickup value.
Curve Characteristics
The instantaneous characteristic curves of the BE1-50/51B-229 are similar to those of standard
electromechanical relays. However, the trip time may be slightly longer in applications where the initial
current through the relay is less than 0.4 amperes. This may occur in a very lightly loaded circuit or when
the relay is pro-viding ground protection and is connected to measure neutral current. Figure 1-2 shows
the instantaneous characteristic curves for maximum time to trip.
1
2−
=M
RD
TR

9252000892 Rev A BE1-50/51B-229 General Information 1-5
Figure 1-2. Instantaneous Characteristic Curves
An additional, fixed delay of 0.1 second may be added with internal switch SW3-2. This delay applies to
both phase and ground applications. Closing switch SW3-2 provides an additional delay of 0.1 second.
For the location of SW3, refer to Section 2, Controls and Indicators.
The instantaneous (50) element in the BE1-50/51B-229 relay may be set lower than the instantaneous
element in SFC relays and still have the same reach. This is because the BE1-50/51B-229 instantaneous
element effectively eliminates the fault current transient overreach components. When calculating BE1-
50/51B-229 instantaneous element settings, calculate the symmetrical value without any adder for
transient overreach.
Instantaneous Reset
The relay resets within 16 milliseconds when the sensed current decreases below the pickup setting.
Burden
Burden is nonlinear and is illustrated in Figure 1-3.
At 0.5 Aac: 4.8 Ω
At 5.0 Aac: 0.2 Ω

1-6 BE1-50/51B-229 General Information 9252000892 Rev A
Figure 1-3. BE1-50/51B-229 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.
Harmonic Response
Figure 1-4 illustrates harmonic rejection and shows that a relay with a 1 ampere pickup setting would pick
up at 0.96 amperes when the current contains 40 percent seventh harmonic. This corresponds to a 10:1
rejection ratio. Other conditions may be evaluated in the same manner.

9252000892 Rev A BE1-50/51B-229 General Information 1-7
Figure 1-4. 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 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).
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
Input to Output Circuits: 2,000 Vac or 2828 Vdc
Surge Withstand Capability
Qualified to IEEE C37.90.1-1989, Standard Surge Withstand Capability (SWC) Tests for Protective
Relays and Relay Systems.
Impulse
Qualified to IEC 255-5.

1-8 BE1-50/51B-229 General Information 9252000892 Rev A
Radio Frequency Interference (RFI)
Field-tested using a 5-watt, handheld transceiver operating at random frequencies centered around 144
MHz and 440 MHz, with the antenna located 6 inches from the relay in both horizontal and vertical
planes.
Vibration
Withstands 2 G in each of three mutually perpendicular planes, swept over the range of 10 to 500 Hz for
a total of 6 sweeps, 15 minutes each sweep.
Shock
Withstands 15 G in each of three mutually perpendicular planes.
Environment
Operating Temperature: −40°F to 158°F (−40°C to 70°C)
Storage Temperature: −50°F to 122°F (−58°C to 50°C)
Agency Recognition
GOST-R Certification
GOST-R certified No. POCC US.ME05.B03391; complies with the relevant standards of Gosstandart of
Russia. Issued by accredited certification body POCC RU.0001.11ME05.
Physical
Weight: 6.1 lb (2.77 kg)
Patent
Patented in U.S., 1998, Number 5751532

9252000892 Rev A BE1-50/51B-229 Controls and Indicators i
SECTION 2 •CONTROLS AND INDICATORS
TABLE OF CONTENTS
SECTION 2 •CONTROLS AND INDICATORS........................................................................................2-1
INTRODUCTION....................................................................................................................................2-1
FRONT PANEL......................................................................................................................................2-1
CIRCUIT BOARD...................................................................................................................................2-2
Figures
Figure 2-1. Front Panel Controls and Indicators .......................................................................................2-1
Figure 2-2. Circuit Board Controls.............................................................................................................2-3
Tables
Table 2-1. Front Panel Control and Indicator Descriptions.......................................................................2-2
Table 2-2. Circuit Board Control Descriptions........................................................................................... 2-3

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