INSTRUCTION MANUAL
FOR
BE1-50/51B
OVERCURRENT RELAY
Part Numbers
9252000122
Publication: 9252000997
Revision: ― 08/10
9252000997
First Printing: August 2010
Printed in USA
Copyright © 2010 Basler Electric, Highland Illinois USA
INTRODUTION
This manual, publication 9252000997, covers BE1-50/51B-122 (P/N 9252000122) relays and is a special
version of the standard manual for the BE1-50/51B-219 and BE1-50/51B-226 relays. The 50/51B-122
relay is a modified version of the BE1-50/51B-219, and has five ampere current sensing and provides an
extended instantaneous element time delay.
BE1-50/51B-122 relays have the following features.
Plugs directly into an ABB CO case with no modification of case wiring required.
Provides up to 300 milliseconds of instantaneous element time delay.
Replicates ABB CO and IEC time characteristic curves.
OPERATING DIFFERENCES
Operating differences between the BE1-50/51B-122 relay and the standard BE1-50/51B-219 relay center
around the function of configuration switch SW3 and the time characteristic curves available in the relays.
SW3 Settings
Operation of switch SW3 (illustrated in Figure 2-2) in the BE1-50/51B-122 differs from that in the BE150/51B-219 relay. SW3 operation is summarized in the following paragraphs.
SW3-1 Selects the system operating frequency.
Off selects 60 hertz operation.
On selects 50 hertz operation.
SW3-2 Selects an additional 100 milliseconds of instantaneous element time delay.
Off disables additional 100 milliseconds of time delay.
On enables additional 100 milliseconds of time delay.
SW3-3 Selects an additional 200 milliseconds of instantaneous element time delay.
Off disables additional 200 milliseconds of time delay.
On enables additional 200 milliseconds of time delay.
Placing both SW3-2 and SW3-3 in the On position provides a total instantaneous element
time delay of 300 milliseconds.
SW3-4 Selects either instantaneous or integrating reset characteristic.
Off selects instantaneous reset.
On selects integrating reset.
The integrating reset function operates only when there is sufficient sensing current to
power the relay.
Time Characteristic Curves
The ABB CO and IEC curves listed in Table 1-3 are available for selection in the BE1-50/51B-122 relay.
GE IAC curves are not available in this relay.
A-1
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INTRODUCTION
This instruction manual provides information about the operation and installation of the BE1-50/51B-219
and BE1-50/51B-226 Overcurrent Relays. To accomplish this, the following information is provided:
General Information and Specifications
Controls and Indicators
Functional Description
Installation and Maintenance
Testing
WARNING!
To avoid personal injury or equipment damage, only qualified personnel should
perform the procedures in this manual.
9252000981 Rev H BE1-50/51B-219/-226 Introduction i
First Printing: June 1996
Printed in USA
© 2009 Basler Electric, Highland Illinois 62249 USA
All Rights Reserved
January 2009
CONFIDENTIAL
of Basler Electric, Highland Illinois, USA. It is loaned for confidential use, subject
to return on request, and with the mutual understanding that it will not be used in
any manner detrimental to the interest of Basler Electric.
It is not
provide data for every possible contingency regarding installation or operation. The availability and design
of all features and options are subject to modification without notice. Should further information be
required, contact Basler Electric.
the intention of this manual to cover all details and variations in equipment, nor does this manual
INFORMATION
BASLER ELECTRIC
ROUTE 143, BOX 269
HIGHLAND IL 62249 USA
http://www.basler.com, info@basler.com
PHONE +1 618.654.2341 FAX +1 618.654.2351
ii BE1-50/51B-219/-226 Introduction 9252000981 Rev H
REVISION HISTORY
The following information provides a historical summary of the changes made to this instruction manual
(9252000981). Revisions are listed in reverse chronological order.
Manual
Revision and Date
H, 01/09
G, 03/08
F, 01/07
E, 09/06
D, 12/00
C, 10/00
B, 12/99
A, 05/98
Removed notes about hard-wiring relay case to ground since relay
is a direct replacement, i.e. not shipped with a case.
Updated Storage statement in Section 4.
Modified Figure 5-2, Target Operational Test Setup.
In Section 5, modified Target Test so that TIME and INST targets
can be verified independently from each other.
Minor text edits throughout manual.
Updated front panel drawings.
Moved Time Characteristic Curve Figures to Appendix A.
Moved Section 6, Maintenance information into Section 4,
Installation.
Changed factory setting of SW3-3 to OFF. Added note about hard
wiring relay to earth ground in Section 4, Installation.
Updated drawings in Section 2 to reflect changes to the PC board.
Updated drawings to reflect changes to the overlay. Also updated
the rest of the manual to reflect the change in switch call out from
SW8 to SW3. Added new functionality to the PICKUP LED. It is
now the ACTIVE/PICKUP LED and will be green when active and
red when picked up.
Added BE1-50/51B-226, one ampere sensing input data throughout
the manual, and corrected switch values in Table 2-1.
Corrected Figures 3-1, 4-2, 4-3, 5-1, and 5-2. Changed all
references to the current for testing the targets to an ac only type of
current.
Added Patent number to Specifications. Changed manual format to
reflect the current style and added Section 7.
Change
9252000981 Rev H BE1-50/51B-219/-226 Introduction iii
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iv BE1-50/51B-219/-226 Introduction 9252000981 Rev H
CONTENTS
SECTION 1 GENERAL INFORMATION ................................................................................................ 1-1
SECTION 2 CONTROLS AND INDICATORS........................................................................................ 2-1
SECTION 3 FUNCTIONAL DESCRIPTION...........................................................................................3-1
SECTION 4 INSTALLATION .................................................................................................................. 4-1
SECTION 5 TESTING ............................................................................................................................ 5-1
APPENDIX A TIME CHARACTERISTIC CURVES................................................................................A-1
9252000981 Rev H BE1-50/51B-219/-226 Introduction v
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vi BE1-50/51B-219/-226 Introduction 9252000981 Rev H
SECTION 1 GENERAL INFORMATION
TABLE OF CONTENTS
SECTION 1 GENERAL INFORMATION ................................................................................................1-1
INTRODUCTION....................................................................................................................................1-1
FEATURES............................................................................................................................................1-1
Advantages.........................................................................................................................................1-2
SPECIFICATIONS................................................................................................................................. 1-2
Current Sensing Input ........................................................................................................................1-2
Time Overcurrent (51) Element.......................................................................................................... 1-2
Instantaneous Overcurrent (50) Element...........................................................................................1-5
Burden................................................................................................................................................ 1-6
Frequency Response......................................................................................................................... 1-7
Transient Response........................................................................................................................... 1-7
Harmonic Response........................................................................................................................... 1-7
Target Indicators ................................................................................................................................1-8
Output Contacts .................................................................................................................................1-8
Type Tests.......................................................................................................................................... 1-8
Environment .......................................................................................................................................1-9
Agency Recognition ........................................................................................................................... 1-9
Physical..............................................................................................................................................1-9
Figures
Figure 1-1. Integrating Reset Characteristic Curve...................................................................................1-5
Figure 1-2. Instantaneous Characteristic Curves......................................................................................1-6
Figure 1-3. Burden Characteristics............................................................................................................ 1-7
Figure 1-4. Harmonic Rejection................................................................................................................. 1-8
Tables
Table 1-1. ABB Relays Suitable for Direct Replacement.......................................................................... 1-1
Table 1-2. Time Characteristic Curve Constants with SW3-3 Open (Off)................................................. 1-3
Table 1-3. Time Characteristic Curve Constants with SW3-3 Closed (On)..............................................1-4
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ii BE1-50/51B-219/-226 General Information 9252000981 Rev H
SECTION 1 GENERAL INFORMATION
INTRODUCTION
BE1-50/51B-219 and BE1-50/51B-226 protective relays are direct replacements for Westinghouse/ABB
type CO relays. The BE1-50/51B-219 has a 5 ampere current sensing input. The BE1-50/51B-226 has a
1 ampere current sensing input. Specific relays by catalog number are listed in Table 1-1.
Table 1-1. ABB Relays Suitable for Direct Replacement
ABB Catalog Number Curve Type
CO-2111N
CO-5111N
CO-6111N
CO-7111N
CO-8111N
CO-9111N
CO-11111N
Any digit covering all pickup ranges and 50 Hz or 60 Hz models.
To replace an existing Westinghouse/ABB type CO (hereinafter referred to as ABB relay), perform the
following steps.
1. Select the desired relay settings on your new BE1-50/51B-219 or BE1-50/51B-226 relay.
2. Remove the existing ABB relay cradle.
3. Insert the new relay cradle.
4. Close the knife-blade switches.
5. Install the new Basler Electric cover and secure with the captive thumbnut.
Basler Electric BE1-50/51B-219 and BE1-50/51B-226 protective relays are self-powered, microprocessorbased, non-directional phase or ground relays that monitor the magnitude of a single-phase ac current to
provide accurate instantaneous and time overcurrent protection for 50 Hz or 60 Hz power systems. Each
model covers 15 popular time characteristics, a wide range of pickup settings, and field selectable
instantaneous or integrating reset.
Short Time
Long Time
Definite
Moderately Inverse
Inverse
Very Inverse
Extremely Inverse
FEATURES
A wide range of pickup settings and front panel selectable time characteristics permit applications
involving coordination with fuses, reclosers, cold load pickup, motor starting, and fixed time requirements.
Also, an integrating reset function is available to simulate the disk reset of electromechanical relays.
BE1-50/51B-219 and BE1-50/51B-226 overcurrent relays have the following standard features.
Independent time and instantaneous elements
A secure method to manually trip the breaker at the relay front panel
Direct reading front panel controls
Minimum pickup setting for safety during installation
Time characteristics extend to a pickup multiple of 40
Rugged draw-out construction with steel case
Gravity latching targets retain indication without power
Built-in accuracy eliminates internal adjustments
Minimum transient overreach
Field selectable characteristic curve selection similar to either GE IAC or ABB type curves
Field selectable instantaneous or integrating reset
Field selectable 50 or 60 Hz operation
Field selectable 0.0 or 0.1 second, fixed, instantaneous delay
Internal switches provide for selecting system operating frequencies of 50 or 60 Hz, instantaneous
element delays of 0.0 or 0.1 second, characteristic curve group selection for either ABB CO or GE IAC
9252000981 Rev H BE1-50/51B-219/-226 General Information 1-1
type curves, and instantaneous or integrating reset characteristics. Switch location and description is
provided in Section 2.
Advantages
BE1-50/51B
relays. The primary advantages are.
Time characteristics are defined by equations and graphs
Field selectable time characteristics
Very low burden extends the linear range of the CTs
Self powered from the sensed current
Continuous automatic calibration
BE1-50/51B-219 and BE1-50/51B-226 overcurrent relays may be tested without removing the relay from
the case. Shorting contacts are provided for all current inputs when the connection plugs or relay chassis
is removed from the relay case.
-219 and BE1-50/51B-226 overcurrent relays have many advantages over other overcurrent
SPECIFICATIONS
BE1-50/51B-219 and BE1-50/51B-226 electrical and physical specifications are listed in the following
paragraphs.
Current Sensing Input
BE1-50/51B-219
Continuous Current: 14 Aac
One Second Rating: 400 Aac
BE1-50/51B-226
Continuous Current: 2.8 Aac
One Second Rating: 80 Aac
Time Overcurrent (51) Element
Setting the T
state and may be used as a safety setting.
BE1-50/51B-219 Pickup
Setting Range: 0.5 to 15.9 Aac
Setting Increment: 0.1 Aac
Accuracy: ±2%, ±25 milliamperes at or above 0.5 ampere setting
BE1-50/51B-226 Pickup
Setting Range: 0.1 to 3.18 Aac
Setting Increment: 0.02 Aac
Accuracy: ±2%, ±5 milliamperes at or above 0.1 ampere setting
Dropout
Dropout occurs at 95% of pickup value.
Timing Range
0.0 to 9.9 seconds in 0.1 second steps.
IME PICKUP control at the minimum pickup setting places the relay in the most sensitive
Timing Accuracy
The timing accuracy is the sum of ±1 cycle, ±2%. This accuracy applies to the range of 1.3 to 40 times tap
and is for a given measured multiple of tap. The measurement of the multiple of tap has an accuracy that
is the sum of ±2%, ±25 milliamperes for the BE1-50/51B-219 and ±2%, ±5 milliamperes for the BE150/51B-226.
1-2 BE1-50/51B-219/-226 General Information 9252000981 Rev H
Timing Accuracy Example (BE1-50/51B-219)
PU setting: 5 amperes
Current Applied: 6.5 amperes
+ Multiple Tolerance: 6.655 amperes
– Multiple Tolerance: 6.345 amperes
Time Curve: E
Time Dial: 5.0
Minimum time dial
using 6.655 amperes: 46.5470 seconds
Maximum time dial
using 6.345 amperes: 61.3968 seconds
Curve time using 6.5 amperes: 53.1800 seconds
Curve Characteristics
Nine inverse time functions and one fixed time function can be selected by the front-panel Curve switch.
Characteristic curves for the inverse and definite time functions are defined by the following equation.
Where: T
T
T
AD
N
KBD
CM
-
A, B, C, N, K = constants for the particular curve
= time to trip in seconds
T
D = time dial setting
M = multiple of pickup setting
Time characteristic curve constants are listed in Tables 1-2 and 1-3. Constants have been selected to
conform to the characteristics of electromechanical relays over a range of pickup multiples from 1.3 to 40.
Values of the constants are provided for use in computer relay setting software. Timing accuracy is 1
cycle, 2 percent of time to trip.
Table 1-2. Time Characteristic Curve Constants with SW3-3 Open (Off)
Curve Type
BE1 Similar To
Figure
Number †
A B C N K R
Constants
S ABB CO-2 A-1 0.2663 0.03393 1.000 1.2969 0.028 0.500
L ABB CO-5 A-2 5.6143 2.18592 1.000 1.000 0.028 15.750
D ABB CO-6 A-3 0.4797 0.21359 1.000 1.5625 0.028 0.875
M ABB CO-7 A-4 0.3022 0.12840 1.000 0.5000 0.028 1.750
I ABB CO-8 A-5 8.9341 0.17966 1.000 2.0938 0.028 9.000
V ABB CO-9 A-6 5.4678 0.10814 1.000 2.0469 0.028 5.500
E ABB CO-11 A-7 7.7624 0.02758 1.000 2.0938 0.028 7.750
B BS142-B ‡ A-8 1.4638 0.00000 1.000 1.0469 0.028 3.250
C BS142-C ‡ A-9 8.2506 0.00000 1.000 2.0469 0.028 8.000
F None § N/A 0.0000 1.00000 0.000 0.0000 0.000 1.000
9252000981 Rev H BE1-50/51B-219/-226 General Information 1-3
Table 1-3. Time Characteristic Curve Constants with SW3-3 Closed (On)
Curve Type
BE1 Similar To
Figure
Number †
A B C N K R
Constants
S GE IAC 55 A-10 0.0286 0.0208 1.000 0.9844 0.028 0.0940
L GE IAC 66 A-11 2.3955 0.00002 1.000 0.3125 0.028 7.8001
D ABB CO-6 A-3 0.4797 0.21359 1.000 1.5625 0.028 0.8750
M ABB CO-7 A-4 0.3022 0.12840 1.000 0.5000 0.028 1.7500
I GE IAC 51 A-12 0.2747 0.1042 1.000 0.4375 0.028 0.8868
V GE IAC 53 A-13 4.4309 0.0991 1.000 1.9531 0.028 5.8231
E GE IAC 77 A-14 4.9883 0.0129 1.000 2.0469 0.028 4.7742
B BS142-B ‡ A-8 1.4636 0.00000 1.000 1.0469 0.028 3.2500
C BS142-C ‡ A-9 8.2506 0.00000 1.000 2.0469 0.028 8.0000
F None § N/A 0.0000 1.00000 0.000 0.0000 0.000 1.0000
Notes for Tables 1-2 and 1-3
BE1 Curve Types: S: Short Inverse V: Very Inverse
L: Long Inverse E: Extremely Inverse
D: Definite Time B: BS142 Very Inverse
M: Moderately Inverse C: BS142 Extremely Inverse
I: Inverse F: Fixed Time Delay
† Figure numbers refer to the characteristic curves located in Appendix A, Time Characteristic Curves.
‡ Curves B and C are defined in British Standard BS142 and IEC Standard IEC 255-4.
§ Fixed time delay, adjustable from 0.1 to 9.9 seconds.
Integrating Reset
Reset begins when the current drops below 95% of pickup. Integrating reset simulates the disk reset of
electromechanical relays. BE1-50/51B-219 and BE1-50/51B-226 relays provide the integrating reset
function even when input current falls to zero.
Integrating reset characteristics are defined by the following equation and shown in Figure 1-1. Equation
constants are provided in Tables 1-2 or 1-3.
Integrating Reset Equation:
Where:
T
= Time to reset in seconds
RD
T
R
2
1M
R
R = Constant for the particular curve
D = TIME DIAL setting
M = Current in multiples of PICKUP setting during reset
1-4 BE1-50/51B-219/-226 General Information 9252000981 Rev H
100.0
10.0
xRD (Seconds)
1.0
0.000 0.200 0.400 0.600 0.800 1.000 1.200
Multiple of Pickup
Vertical axis xRD (Seconds) is applicable for all curves and is derived from
multiplying the constant R for the curve selected times D (the Time Dial setting).
Figure 1-1. Integrating Reset Characteristic Curve
P0046-11
Instantaneous Overcurrent (50) Element
Setting the I
NST PICKUP at the minimum pickup setting places the relay in the most sensitive state and
may be used as a safety setting.
BE1-50/51B-219 Pickup
Setting Range: 1 to 99 Aac
Setting Increment: 1 Aac
Accuracy: ±2%, ±25 milliamperes at or above 1.0 ampere setting
BE1-50/51B-226 Pickup
Setting Range: 0.2 to 19.8 Aac
Setting Increment: 0.2 Aac
Accuracy: ±2%, ±5 milliamperes at or above 0.2 ampere setting
Dropout
Dropout occurs at 95% of pickup value.
Curve Characteristics
Instantaneous characteristic curves are similar to standard electromechanical instantaneous units.
However, the time to trip for applications where the initial current through the relay is less than 0.4
ampere (5 ampere relay) or 0.08 ampere (1 ampere relay) may be slightly longer. This may occur on a
very lightly loaded circuit or when the relay is providing ground protection and is connected to measure
neutral current. Figure 1-2 shows the instantaneous characteri stic curves for maximum time to trip.
An additional fixed delay of 0.1 second may be added with internal switch SW3-2. This delay applies to
both phase and ground applications. Closing switch SW3-2 provides an additional delay of 0.1 second.
Section 2 illustrates the location of SW3.
The instantaneous element in BE1-50/51B-219 and BE1-50/51B-226 relays may be set lower than the
instantaneous element in ABB relays and still have the same reach. This is because the BE1-50/51B-219
and BE1-50/51B-226 instantaneous element effectively eliminates the fault current transient overreach
components. When calculating BE1-50/51B-219 and BE1-50/51B-226 relay instantaneous element
settings, calculate the symmetrical value without any adder for transient overreach.
9252000981 Rev H BE1-50/51B-219/-226 General Information 1-5
Figure 1-2. Instantaneous Characteristic Curves
Burden
Burden is non-linear. Figure 1-3 illustrates the devi
ce burden.
BE1-50/51B-219
At 0.5 amperes: 4.8
At 5.0 amperes: 0.2
BE1-50/51B-226
At 0.1 ampere: 120
At 1.0 ampere: 5
1-6 BE1-50/51B-219/-226 General Information 9252000981 Rev H
Figure 1-3. Burden Characteristics
Frequency Response
A chang
pickup.
Transient Response
<10% ove
Harmonic Response
Figure 1-4 shows that a
containing 40% seventh harmonic. This corresponds to a 10:1 rejection ratio. Other conditions may be
evaluated in the same manner.
9252000981 Rev H BE1-50/51B-219/-226 General Information 1-7
e of ±5 Hz from the nominal 50/60 Hz current causes <0.5% change in the current required for
rreach with system time constants up to 40 ms.
relay set for 1 ampere pickup would pick up at 0.96 amperes with a current
Figure 1-4. Harmonic Rejection
Target Indicators
Gravity latch
ed, manually reset targets indicate that current of 0.2 amperes or greater was present in the
trip circuit. Target coil resistance is less than 0.1 ohms and operate time is less than one millisecond. See
Output Contacts for maximum current rating.
Output Contacts
Output co
ntacts are surge protected and rated as follows.
Resistive Ratings
120/240 Vac: Make 30 amperes for 0.2 seconds, carry 7 amperes for 2 minutes, 3
amperes continuously, and break 5 amperes.
125/250 Vdc: Make 30 amperes for 0.2 seconds, carry 7 amperes for 2 minutes, 3
amperes continuously, and break 0.3 ampere.
Inductive Ratings
120/240 Vac, 125/250 Vdc: Make and carry 30 amperes for 0.2 seconds, carry 7 amperes for 2
minutes, 3 amperes continuously, and break 0.3 ampere. (L/R = 0.04).
Type Tests
Isolation
Meets IEC 255-5 and exceeds IEEE C37.90-1989, one-minute dielectric (high potential) tests as follows.
All circuits to ground: 2,828 Vdc or 2,000 Vac
Input to Output Circuits: 2,828 Vdc or 2,000 Vac
Surge Withstand Capability Qualified to IEEE C37.90.1-1989 Standard Surge Withstand Capability (SWC) Tests for Protective Relays
and Relay Systems.
Impulse
Qualified to IEC 255-5.
1-8 BE1-50/51B-219/-226 General Information 9252000981 Rev H
Radio Frequency Interference (RFI)
Field-tested using a 5-watt, hand-held transceiver operating at random frequencies centered around 144
MHz and 440 MHz, with the antenna located 6 inches from the relay in both horizontal and vertical
planes.
Vibration
Withstands 2 G in each of three mutually perpendicular planes swept over the range of 10 to 500 Hz for a
total of 6 sweeps, 15 minutes each sweep.
Shock
Withstands 15 G in each of three mutually perpendicular planes.
Environment
Operating Te
mperature: –40C to 70C (–40F to158F)
Storage Temperature: –50C to 70C (–58F to 158F).
Agency Recognition
GOST-R Certification
GOST-R certified per the relevant stan
dards of Gosstandart of Russia.
Physical
Weig
ht: 6.1 lb (2.77 kg)
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1-10 BE1-50/51B-219/-226 General Information 9252000981 Rev H
SECTION 2 CONTROLS AND INDICATORS
TABLE OF CONTENTS
SECTION 2 CON
INTRODUCTION....................................................................................................................................
Figures
Figure 2-1. Front Panel Controls and Indicators .......................................................................................2-1
Figure 2-2. Location of SW3......................................................................................................................2-2
Tables
Table 2-1. BE1-50/51B-219 and BE1-50/51B-226 Controls and Indicators..............................................2-3
TROLS AND INDICATORS........................................................................................2-1
2-1
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ii BE1-50/51B-219/-226 Controls and Indicators 9252000981 Rev H
SECTION 2 CONTROLS AND INDICATORS
INTRODUCTION
Figure 2-1 illustrates the front panel controls and indicators of the BE1-50/51B-219 and BE1-50/51B-226.
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.
H I
G
F
A
B
P0052-60
DE
C
Figure 2-1. Front Panel Controls and Indicators
9252000981 Rev H BE1-50/51B-219/-226 Controls and Indicators 2-1
P0053-50
SW3
Figure 2-2. Location of SW3
2-2 BE1-50/51B-219/-226 Controls and Indicators 9252000981 Rev H
Table 2-1. BE1-50/51B-219 and BE1-50/51B-226 Controls and Indicators (Refer to Figures 2-1 and 2-2)
Locator Control or Indicator Function
A INST MANUAL TRIP
Test Points
B INST PICKUP
Selectors
C Targets
D TIME PICKUP
Selectors
E
F
CURVE Selector Ten position selector switch to select one of nine inverse functions
TIME DIAL Selectors Two selector switches (UNITS and TENTHS) to select the desired
G TIME MANUAL TRIP
Test Points
When shorted, the test points (jacks) provide a secure means to
manually trip the controlled breaker. Jacks accept a standard 0.08
inch diameter phone tip plug.
Two switches (TENS and UNITS) to select pickup current in
amperes. Changing switch selectors while the relay is in service
may cause tripping.
Red target indicators latch when the trip circuit current is greater
than 0.2 amperes. One target each for TIME and INST.
Two switches (UNITS and TENTHS) t o select pickup current in
amperes. Changing switch selectors while the relay is in service
may cause tripping.
or one fixed time function.
characteristic curve. A setting of 0.0 results in instantaneous
operation without any intentional delay. A setting of 9.9
corresponds to the typical time provided by an electromechanical
relay at its maximum dial setting.
When shorted, the test points provide a secure means to manually
trip the controlled breaker. Jacks accept a standard 0.08 inch
diameter phone tip plug.
H
ACTIVE/PICKUP LED Red LED indicates sensed current has ex ceeded the TIME
PICKUP setting. LED turns from red to green when sensed current
falls below 95% of pickup setting. When the LED is green, the
relay is active but has not picked up.
I
Target Reset Button Linkage extends through back of front cover to reset both gravity
latched target indicators.
SW3
SW3-1
SW3-1 selects the system operating frequency. SW3-1 open
(OFF) selects 60 Hz operation. SW3-1 closed (ON) selects 50 Hz
operation.
SW3-2
SW3-2 provides additional time delay for the instantaneous
element. Closing switch SW3-2 (ON) provides an additional
instantaneous delay of 0.1 second.
SW3-3
SW3-3 provides selection of GE IAC type curves or ABB type
curves. Closing switch SW3-3 (ON) selects GE IAC type curves
(refer to Table 1-3). Opening switch SW3-3 (OFF) selects ABB
type curves (refer to Table 1-2).
SW3-4
SW3-4 provides selection of either instantaneous or integrating
reset characteristics. Closing S W3-4 (ON) selects integrating reset
characteristics. Opening SW3-4 (OFF) selects instantaneous reset
characteristics.
NOTE: In BE1-50/51B-219 Revision F and previous relays and BE1-50/51B-226 Revision I and
previous relays, switch SW3 is designated as SW8.
9252000981 Rev H BE1-50/51B-219/-226 Controls and Indicators 2-3
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SECTION 3 FUNCTIONAL DESCRIPTION
TABLE OF CONTENTS
SECTION 3 FUNCTIONA
GENERAL..............................................................................................................................................
FUNCTIONAL DESCRIPTION ..............................................................................................................3-1
Sensing Input......................................................................................................................................
Power Supply.....................................................................................................................................
Instantaneous Signal.......................................................................................................................... 3-1
Time Signal.........................................................................................................................................
Microprocessor...................................................................................................................................
Power-Off Sensing.............................................................................................................................3-1
Outputs...............................................................................................................................................
Figures
Figure 3-1. Functional Block Diagram....................................................................................................... 3-2
L DESCRIPTION...........................................................................................3-1
3-1
3-1
3-1
3-1
3-1
3-2
9252000981 Rev H BE1-50/51B-219/-226 Functional Description i
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ii BE1-50/51B-219/-226 Functional Description 9252000981 Rev H
SECTION 3 FUNCTIONAL DESCRIPTION
GENERAL
BE1-50/51B-219 and BE1-50/51B-226 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
nt from the power CT is rectified, filtered, and supplied to all relay internal circuitry for operating
Curre
power. A precision +5 Vdc supply also serves as a reference for automatic calibration.
Instantaneous Signal
nt from the signal CT is rectified and applied to the instantaneous scaling resistors controlled by the
Curre
INST PICKUP selector switches. The analog voltage of the instantaneous input signal developed across
the scaling resistors is filtered and applied to the multiplexor (MUX).
Time Signal
nt from the signal CT is also rectified and applied to the time scaling resistors controlled by the TIME
Curre
PICKUP selector switches. The analog voltage of the time input signal is also filtered and applied to the
multiplexor.
Microprocessor
Operating po
microprocessor is active and executing code, the ACTIVE/PICKUP LED is green. When the input current
falls below an acceptable level, the supervisor circuit interrupts the microprocessor, halts further
operation, and turns OFF the ACTIVE/PICKUP LED. A microprocessor watchdog feature resets the
microprocessor program when the program flow is interrupted.
Information from the TIME DIAL selector switches, the TIME CURVE selector switch, and the 50/60 Hz,
INST DELAY, and RESET CHAR switches is also applied to the microprocessor. The microprocessor
uses these inputs to set the operating parameters.
When the microprocessor is ready for analog information from the multiplexor, microprocessor control
signals cause the multiplexor to route the desired input through to the output. The output is converted
from an analog value to a digital value and applied to the microprocessor.
The microprocessor performs the program operations based on the inputs and the internal software
program. When the sensed current exceeds the TIME PICKUP setting, the ACTIVE/PICKUP LED turns
from green to red. TIME contacts (51) are closed in accordance with the time characteristic equation. If
the sensed current exceeds the INST PICKUP setting, the INST contacts (50) are closed.
Power-Off Sensing
r-off sensing circuits measure the voltage across a capacitor at power-down and at power-up.
Powe
These circuits determine how long power has been removed based on the difference voltage and the
circuit RC time constant. This provides information for the integrating reset function even when power has
been entirely removed.
wer from the power supply is applied to the microprocessor supervisor circuit. When the
9252000981 Rev H BE1-50/51B-219/-226 Functional Description 3-1
Outputs
Instantaneous and Timed
System circuit breakers controlled by the output contacts can be manually tripped by applying a short
across the TIME or INST MANUAL TRIP front panel test points. Current flow in the trip circuit is indicated
by the operation of the target. The targets will not operate without adequate operating power for the relay.
WARNING!
Trip circuit voltage is present at the front panel test points. When shorting the test
points, use insulated jumpers to avoid contact with these voltages.
Figure 3-1. Functional Block Diagram
3-2 BE1-50/51B-219/-226 Functional Desc
ription 9252000981 Rev H
SECTION 4 INSTALLATION
TABLE OF CONTENTS
SECTION 4 INSTALLATION ..................................................................................................................4-1
GENERAL..............................................................................................................................................4-1
FACTORY SETTINGS...........................................................................................................................4-1
INSTALLATION......................................................................................................................................4-1
APPLICATION COORDINATION.......................................................................................................... 4-1
CONNECTIONS ....................................................................................................................................4-3
MAINTENANCE.....................................................................................................................................4-4
STORAGE..............................................................................................................................................4-4
Figures
Figure 4-1. Coordination Timing Diagram.................................................................................................4-2
Figure 4-2. AC Input Connections............................................................................................................. 4-3
Figure 4-3. DC Control Connections.........................................................................................................4-4
9252000981 Rev H BE1-50/51B-219/-226 Installation i
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ii BE1-50/51B-219/-226 Installation 9252000981 Rev H
SECTION 4 INSTALLATION
GENERAL
When not shipped as part of a control or switchgear panel, the relays are shipped in sturdy cartons to
prevent damage during transit. Immediately upon receipt of a relay, check the model and part number
against the requisition and packing list to see that they agree. Visually inspect the relay for damage that
may have occurred during shipment. If there is evidence of damage, immediately file a claim with the
carrier and notify the Regional Sales Office, or contact the Sales Representative at Basler Electric,
Highland, Illinois.
Proper operation of the relay may be confirmed by performing the operational test procedure of Section 5.
If the relay won't be installed immediately, store the relay in its original shipping carton in a moisture and
dust-free environment.
FACTORY SETTINGS
Factory settings for the internal switches of SW3 are as follows:
SW3-1 — OFF (60 hertz operation).
SW3-2 — OFF (0.0 additional fixed delay for the instantaneous element).
SW3-3 — OFF (Westinghouse/ABB type characteristic curves).
SW3-4 — ON (Integrating reset characteristics).
INSTALLATION
Select the desired relay settings before putting the relay into service. Changing pickup current settings
while the relay is in service may cause tripping. Perform the following procedures to install the BE150/51B-219 or BE1-50/51B-226 relay.
Select the desired relay settings on your new BE1-50/51B-219/-226 relay.
Remove the existing ABB relay cradle.
Insert the new relay cradle and close the cradle latches locking the relay into the case.
CAUTION
Close all BLACK handle switches before closing any RED handle switches.
Insure that the RED handle switches are closed last.
Close knife-blade switches.
To install the cover, position the interlocking bracket at the top of the new Basler Electric cover into
the mating receptacle at the top of the case. Secure the captive fastener at the bottom of the cover.
APPLICATION COORDINATION
In a typical application coordination scheme, a BE1-50/51B-219 or BE1-50/51B-226 is being used to
provide primary protection for a radial distribution feeder. An electromechanical overcurrent relay with
extremely inverse timing provides protection for the transformer and bus. To improve coordination with
the electromechanical relay, the BE1 relay with integrating reset characteristic has the time characteristic
curve E (extremely inverse) selected (SW3-3 set to OFF) and the TIME DIAL set to 2.0. The feeder
reclosing relay is set for two reclose attempts at 3 and 15 seconds after the initial trip. If a permanent fault
occurs (magnitude ten times pickup), calculate the feeder breaker trip time for each of the three
operations. Refer to Section 1 for characteristic curve constants.
9252000981 Rev H BE1-50/51B-219/-2
26 Installation 4-1
From the time characteristic curve equation.
T
Trip
.
09382
.
.
AD
N
CM
276247
110
524815
.
110806124
KBD
0280202758.0
.
028005516.0
.
seconds 0.209
From the reset characteristic curve equation.
RD
T
2
Reset
27.75
10
2
1M
seconds 15.5
M = 0 if current goes to zero.
Negative result indicates reset time.
Results: Full trip = 0.209 seconds and full reset = 15.5 seconds if current goes to zero.
In Figure 4-1,
T
T
T
= 0.209 seconds (relay was at reset).
A
= value < TA because rewind has not gone to zero.
B
= value < TA because rewind has not gone to zero.
C
Figure 4-1. Coordination Timing Diagram
4-2 BE1-50/51B-219/-226 Installation 9252000981 Rev H
Equation for time to trip during rewind (before relay is reset).
Second Operation
T
Occurence This Trip
T
B
30.209
15.5
Time RewindTrip Full
Rewind Full
Third Operation
B
T
C
C
seconds 0.040T
15.5
seconds 0.161T
11.960.209
CONNECTIONS
Typical ac input and dc control connections are shown in Figures 4-2 and 4-3. Refer to the block diagram
in Section 3 for relay internal connections.
Figure 4-2. AC Input Connections
9252000981 Rev H BE1-50/51B-219/-2
26 Installation 4-3
Figure 4-3. DC Control Connections
MAINTENANCE
BE1-50/51B-219 and BE1-50/51B-226 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.
4-4 BE1-50/51B-219/-226 Installation 9252000981 Rev H
SECTION 5 TESTING
TABLE OF CONTENTS
SECTION 5 TESTING ............................................................................................................................5-1
GENERAL..............................................................................................................................................5-1
DIELECTRIC TEST ............................................................................................................................... 5-1
OPERATIONAL TEST PROCEDURE................................................................................................... 5-1
Test Equipment Required...................................................................................................................5-1
Test Procedure, Models BE1-50/51B-218 (Five Ampere Sensing Input)..........................................5-3
Test Procedure, Models BE1-50/51B-228 (One Ampere Sensing Input)..........................................5-5
SETTING THE RELAY .......................................................................................................................... 5-7
PERIODIC TESTS................................................................................................................................. 5-7
General............................................................................................................................................... 5-7
Periodic Test.......................................................................................................................................5-7
Figures
Figure 5-1. Pickup and Timing Test Setup................................................................................................ 5-2
Figure 5-2. Target Operational Test Setup................................................................................................ 5-2
9252000981 Rev H BE1-50/51B-219/-226 Testing i
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ii BE1-50/51B-219/-226 Testing 9252000981 Rev H
SECTION 5 TESTING
GENERAL
Dielectric testing, operational testing, and periodic testing are described in the following paragraphs.
DIELECTRIC TEST
In accordance with IEC 255-5 and IEEE C37.90-1989, one-minute dielectric (high potential) tests may be
performed as follows:
All circuits to ground: 2,828 Vdc or 2,000 Vac
Input to output circuits: 2,828 Vdc or 2,000 Vac
Output contacts are surge protected.
OPERATIONAL TEST PROCEDURE
The following procedures verify operation of relays BE1-50/51B-219 (5 ampere model) and BE1-50/51B226 (1 ampere model). The test setup of Figures 5-1 and 5-2 are intended primarily as an illustration of
the principles involved. Other test setups known to be capable of testing with the stated and implied
tolerances (including equipment specifically designed for testing relays) may be used.
Test Equipment Required
Current source with a range from 0 to 20 Aac (sensing input current)
AC or DC voltage source (target operation)
Timer or counter
CAUTION
To ensure proper timing during testing, before each test, remove the current from
the unit for R times D seconds (refer to Section 1, Specifications, Time Reset for
R and D definitions).
9252000981 Rev H BE1-50/51B-219/-226 Testing 5-1
Figure 5-1. Pickup and Timing Test Setup
TEST SET
BE1-50/51B-219
TIME INST
89 1 2
R = V/1
Rwatts = 1*V
AC or DC
Voltage
Source
(V)
R
1 A Target Current
10
Figure 5-2. Target Operational Test Setup
P0057-19
CURRENT
SOURCE
START
STOP
INPUT
AMPS
TIMER
5-2 BE1-50/51B-219/-226 Testing 9252000981 Rev H
NOTE
When testing TIME overcurrent functions, INST PICKUP settings of 00 will affect
the calibration of the TIME functions. TIME PICKUP settings of 00 also affect
INST functions.
Test Procedure, Models BE1-50/51B-216 (Five Ampere Sensing Input)
Time Pickup Test
Perform preliminary setup:
Connect test setup as shown in Figure 5-1.
Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to
ON and SW3-4 to ON.
Set TIME DIAL to 0.0.
Set CURVE to S
Set TIME PICKUP to 0.5.
Set INST PICKUP to 90.
Step 1. Slowly increase current to terminals 8 and 9. PICKUP LED should turn RED at a maximum input
current of 0.550 ampere.
Step 2. Decrease input current until PICKUP LED turns GREEN then OFF.
Step 3. Set TIME PICKUP to 2.2.
Step 4. Slowly increase current to terminals 8 and 9. PICKUP LED should change from GREEN to RED
at an input current of 2.131 to 2.269 amperes.
Step 5. Decrease input current until PICKUP LED turns OFF.
INST Pickup Test
Perform preliminary setup:
Connect test setup as shown in Figure 5-1.
Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to
ON, and SW3-4 ON.
Set TIME DIAL to 0.0.
Set CURVE to S
Set TIME PICKUP to 15.9.
Set INST PICKUP to 01.
Step 1. Slowly increase current to terminals 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.
Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to
ON, and SW3-4 ON.
Set TIME DIAL to 4.5.
Set CURVE to S
Set TIME PICKUP to 1.0.
Set INST PICKUP to 90.
9252000981 Rev H BE1-50/51B-219/-226 Testing 5-3
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.
Target Test
Perform preliminary setup:
Connect test setup as shown in Figure 5-2.
Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to
ON, and SW3-4 ON.
Set TIME DIAL to 4.5.
Set CURVE to S
Set TIME PICKUP to 1.0.
Set INST PICKUP to 90.
Step 1. Set voltage source to provide a target current of 1.0 ampere.
Step 2. Apply 5 amperes input current to terminals 8 and 9. Check that the TIME target operates.
Step 3. Remove input current and reset target.
Step 4. Set TIME PICKUP to 15.9 and set INST PICKUP to 01.
Step 5. Set voltage source to provide a target current of 1.0 ampere.
Step 6. Apply 5 amperes input current to terminals 8 and 9. Check that the INST target operates.
Step 7. Remove input current and reset target.
Manual Trip Test
Perform preliminary setup:
Connect test setup as shown in Figure 5-2.
Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to
ON, and SW3-4 ON.
Set TIME DIAL to 4.5.
Set CURVE to S
Set TIME PICKUP to 1.0.
Set INST PICKUP to 01.
WARNING!
Trip circuit voltage is present at the front panel test points. When shorting the test
points, use insulated jumpers to avoid contact with these voltages.
Step 1.
Set voltage source to provide a target current of 1.0 ampere.
Step 2. Apply 0.9 ampere input current to terminals 8 and 9. (0.9 ampere provides input power but stays
below pickup.)
Step 3. Connect a jumper between TIME MANUAL TRIP test points. Check that TIME target operates.
Step 4. Connect a jumper between INST MANUAL TRIP test points. Check that INST target operates.
Step 5. Reset targets.
5-4 BE1-50/51B-219/-226 Testing 9252000981 Rev H
Integrating Reset Test
Perform preliminary setup:
Connect test setup as shown in Figure 5-1.
Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to
ON, and SW3-4 ON.
Set TIME DIAL to 9.9.
Set CURVE to V.
Set TIME PICKUP to 1.0.
Set INST PICKUP to 90.
Step 1. Set voltage source to provide a target current of 1.0 ampere.
Step 2. Read all of Step 3 before beginning Step 3.
Step 3. Apply 4.0 amperes input current to terminals 8 and 9. After the unit trips, remove the input current
for 29 ±0.25 seconds, then reapply the 4.0 amperes input current. Record the elapsed time from
the re-application of input current to the output retrip.
Result: Elapsed time should be 2.08 ±0.4 seconds.
Test Procedure, Models BE1-50/51B-226 (One Ampere Sensing Input)
Time Pickup Test
Perform preliminary setup:
Connect test setup as shown in Figure 5-1.
Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to
ON and SW3-4 to ON.
Set TIME DIAL to 0.0.
Set CURVE to S
Set TIME PICKUP to 0.5.
Set INST PICKUP to 18.0.
Step 1. Slowly increase current to terminals 8 and 9. PICKUP LED should turn RED at a maximum input
current of 0.110 ampere.
Step 2. Decrease input current until PICKUP LED turns GREEN then OFF.
Step 3. Set TIME PICKUP to 0.44.
Step 4. Slowly increase current to terminals 8 and 9. PICKUP LED should change from GREEN to RED
at an input current of 0.426 to 0.454 amperes.
Step 5. Decrease input current until PICKUP LED turns OFF.
INST Pickup Test
Perform preliminary setup:
Connect test setup as shown in Figure 5-1.
Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to
ON, and SW3-4 ON.
Set TIME DIAL to 0.0.
Set CURVE to S
Set TIME PICKUP to 3.18.
Set INST PICKUP to 0.2
Step 1. Slowly increase current to terminals 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 08.
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.
9252000981 Rev H BE1-50/51B-219/-226 Testing 5-5
Time Dial Test
Perform preliminary setup:
Connect test setup as shown in Figure 5-1.
Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to
ON, and SW3-4 ON.
Set TIME DIAL to 4.5.
Set CURVE to S
Set TIME PICKUP to 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 0.345 to 0.424 seconds. (This tolerance is greater than ±2 % because it is the accumulation
of both pickup and timing tolerances.)
Step 3. Remove input current.
Target Test
Perform preliminary setup:
Connect test setup as shown in Figure 5-2.
Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to
ON, and SW3-4 ON.
Set TIME DIAL to 4.5.
Set CURVE to S
Set TIME PICKUP to 0.2.
Set INST PICKUP to 19.8.
Step 1. Set voltage source to provide a target current of 1.0 ampere.
Step 2. Apply 1 ampere input current to terminals 8 and 9. Check that the TIME target operates.
Step 3. Remove input current and reset target.
Step 4. Set TIME PICKUP to 3.18 and set INST PICKUP to 0.2.
Step 5. Set voltage source to provide a target current of 1.0 ampere.
Step 6. Apply 1 ampere input current to terminals 8 and 9. Check that the INST target operates.
Step 7. Remove input current and reset target.
Manual Trip Test
Perform preliminary setup:
Connect test setup as shown in Figure 5-2.
Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to
ON, and SW3-4 ON.
Set TIME DIAL to 4.5.
Set CURVE to S
Set TIME PICKUP to 0.2.
Set INST PICKUP to 0.2.
WARNING!
Trip circuit voltage is present at the front panel test points. When shorting the test
points, use insulated jumpers to avoid contact with these voltages.
Step 1.
Set voltage source to provide a target current of 1.0 ampere.
Step 2. Apply 0.15 ampere input current to terminals 8 and 9. (0.15 ampere provides input power but
stays below pickup.)
5-6 BE1-50/51B-219/-226 Testing 9252000981 Rev H
Step 3. Connect a jumper between TIME MANUAL TRIP test points. Check that TIME target operates.
Step 4. Connect a jumper between INST MANUAL TRIP test points. Check that INST target operates.
Step 5. Reset targets.
Integrating Reset Test
Perform preliminary setup:
Connect test setup as shown in Figure 5-1.
Insure that SW3 switches are set: SW3-1 for the operating frequency, SW3-2 to OFF, SW3-3 to
ON, and SW3-4 ON.
Set TIME DIAL to 4.5.
Set CURVE to I.
Set TIME PICKUP to 0.20.
Set INST PICKUP to 18.0.
Step 1. Set voltage source to provide a target current of 1.0 ampere.
Step 2. Read all of Step 3 before beginning Step 3.
Step 3. Apply 0.8 amperes input current to terminals 8 and 9. After the unit trips, remove the input current
for 20 ±0.25 seconds, then reapply the 0.8 amperes input current. Record the elapsed time from
the re-application of input current to the output retrip.
Result: Elapsed time should be 1.55 ±0.3 seconds.
SETTING THE RELAY
Select the desired relay settings before putting the relay into service. Changing pickup current settings
while the relay is in service may cause tripping.
PERIODIC TESTS
General
All relays should be tested periodically to identify and correct any problems that are found.
Single phase relays such as the BE1-50/51B-214 and BE1-50/51B-225 are normally used in groups of
four (three phase and ground) on the protected circuit. This relay scheme allows each unit to be
withdrawn one at a time for testing purposes without losing protection. Only three are required at any one
time to sense all types of faults on a grounded wye system. Refer to Figures 5-1 and 5-2 for
recommended test setups.
Periodic Test
Periodi
Step 1. Verify that the instantaneous pickup is within ±2% of the value set on the dials. Pickup occurs
Step 2. Verify that the time pickup is within ±2% of the value set on the dials. Pickup occurs when the
Step 3. Verify that the time to trip for the curve and time dial settings at a multiple of six is the same as
Step 4. Verify that the time to trip for the instantaneous element at a pickup multiple of 2 is not greater
Step 5. Verify that the targets operate with one ac ampere of trip current in the trip circuits and that they
c testing should consist of the following procedures.
when the INST output contacts close.
LED turns GREEN then RED.
the time given on the characteristic curve. Refer to Section 1 for the characteristics curves.
than the time given on the instantaneous characteristic curve. Refer to Section 1 for the
instantaneous characteristic curve.
can be reset using the RESET BUTTON.
9252000981 Rev H BE1-50/51B-219/-226 Testing 5-7
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5-8 BE1-50/51B-219/-226 Testing 9252000981 Rev H
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)..................A-2
Figure A-3. Time Characteristic Curve, D-Definite Time (Similar to ABB CO-6) ......................................A-3
Figure A-4. Time Characteristic Curve, M-Moderately Inverse (Similar to ABB CO-7).............................A-4
Figure A-5. Time Characteristic Curve, I-Inverse (SW3-3 OFF, Similar to ABB CO-8) ...........................A-5
Figure A-6. Time Characteristic Curve, V-Very Inverse (SW3-3 OFF, Similar to ABB CO-9) .................A-6
Figure A-7. Time Characteristic Curve, E-Extremely Inverse (SW3-3 OFF, Similar to ABB CO-11)........A-7
Figure A-8. Time Characteristic Curve, BS142-B (BS142 Very Inverse)..................................................A-8
Figure A-9. Time Characteristic Curve, BS142-C (BS142 Extremely Inverse).........................................A-9
Figure A-10. Time Characteristic Curve, S2-Short Inverse (SW3-3 ON, Similar to GE IAC 55).............A-10
Figure A-11. Time Characteristic Curve, L2-Long Inverse (SW3-3 ON, Similar to GE IAC 66)..............A-11
Figure A-12. Time Characteristic Curve, I2-Inverse (SW3-3 ON, Similar to GE IAC 51)........................A-12
Figure A-13. Time Characteristic Curve, V2-Very Inverse (SW3-3 ON, Similar to GE IAC 53)..............A-13
Figure A-14. Time Characteristic Curve, E2-Extremely Inverse (SW3-3 ON, Similar to GE IAC 77).....A-14
9252000981 Rev H BE1-50/51B-219/-226 Time Characteristic Curves i
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ii BE1-50/51B-219/-226 Time Characteristic Curves 9252000981 Rev H
APPENDIX A TIME CHARACTERISTIC CURVES
TIME CHARACTERISTIC CURVES
Figures A-1 through A-14 illustrate the time characteristic curves that are programmed into the nonvolatile
memory of this relay.
Figure A-1. Time Characteristic Curve, S-Short Inverse
(SW3-3 OFF, Similar to ABB CO-2)
9252000981 Rev H BE1-50/51B-219/-226 Time Char
acteristic Curves A-1
Figure A-2. Time Characteristic Curve, L-Long Inverse
(SW3-3 OFF, Similar to ABB CO-5)
A-2 BE1-50/51B-219/-226 Time Characteri
stic Curves 9252000981 Rev H
Figure A-3. Time Characteristic Curve, D-Definite Time
(Similar to ABB CO-6)
9252000981 Rev H BE1-50/51B-219/-226 Time Char
acteristic Curves A-3
Figure A-4. Time Characteristic Curve, M-Moderately Inverse
(Similar to ABB CO-7)
A-4 BE1-50/51B-219/-226 Time Characteri
stic Curves 9252000981 Rev H
Figure A-5. Time Characteristic Curve, I-Inverse
(SW3-3 OFF, Similar to ABB CO-8)
9252000981 Rev H BE1-50/51B-219/-226 Time Char
acteristic Curves A-5
Figure A-6. Time Characteristic Curve, V-Very Inverse
(SW3-3 OFF, Similar to ABB CO-9)
A-6 BE1-50/51B-219/-226 Time Characteri
stic Curves 9252000981 Rev H
Figure A-7. Time Characteristic Curve, E-Extremely Inverse
(SW3-3 OFF, Similar to ABB CO-11)
9252000981 Rev H BE1-50/51B-219/-226 Time Char
acteristic Curves A-7
Figure A-8. Time Characteristic Curve, BS142-B
(BS142 Very Inverse)
A-8 BE1-50/51B-219/-226 Time Characteri
stic Curves 9252000981 Rev H
Figure A-9. Time Characteristic Curve, BS142-C
(BS142 Extremely Inverse)
9252000981 Rev H BE1-50/51B-219/-226 Time Char
acteristic Curves A-9
Figure A-10. Time Characteristic Curve, S2-Short Inverse
(SW3-3 ON, Similar to GE IAC 55)
A-10 BE1-50/51B-219/-226 Time Characteri
stic Curves 9252000981 Rev H
Figure A-11. Time Characteristic Curve, L2-Long Inverse
(SW3-3 ON, Similar to GE IAC 66)
9252000981 Rev H BE1-50/51B-219/-226 Time Char
acteristic Curves A-11
Figure A-12. Time Characteristic Curve, I2-Inverse
(SW3-3 ON, Similar to GE IAC 51)
A-12 BE1-50/51B-219/-226 Time Characteri
stic Curves 9252000981 Rev H
Figure A-13. Time Characteristic Curve, V2-Very Inverse
(SW3-3 ON, Similar to GE IAC 53)
9252000981 Rev H BE1-50/51B-219/-226 Time Char
acteristic Curves A-13
Figure A-14. Time Characteristic Curve, E2-Extremely Inverse
(SW3-3 ON, Similar to GE IAC 77)
A-14 BE1-50/51B-219/-226 Time Characteri
stic Curves 9252000981 Rev H
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