Basler BE1-50B-235 User manual

INSTRUCTION MANUAL
FOR
OVERCURRENT RELAYS
BE1-50/51B-235 and BE1-50/51B-236
Publication: 9252000898
Revision: — 04/08
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9252000898 Rev — BE1-50/51B-235/-236 Introduction i
INTRODUCTION
This instruction manual provides information about the operation and installation of the BE1-50/51B-235
and BE1-50/51B-236 Overcurrent Relays. To accomplish this, the following information is provided:
•General Information and Specifications
•Controls and Indicators
•Functional Description
•Installation and Maintenance
•Testing
WARNING!
To avoid personal injury or equipment damage, only qualified personnel should
perform the procedures in this manual.
NOTE
Be sure that the relay is hard-wired to earth ground with no smaller than 12 AWG
copper wire attached to the ground terminal on the rear of the unit case. When
the relay is configured in a system with other devices, it is recommended to use a
separate lead to the ground bus from each unit.
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ii BE1-50/51B-235/-236 Introduction 9252000898 Rev —
First Printing: April 2008
Printed in USA
© 2008 Basler Electric, Highland Illinois 62249 USA
All Rights Reserved
April 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.
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REVISION HISTORY
The following information provides a historical summary of the changes made to this instruction manual
(9252000898). Revisions are listed in reverse chronological order.
Manual
Revision and Date Change
—, 04/08 •Initial release
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9252000898 Rev — BE1-50/51B-235/-236 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 •CHARACTERISTIC CURVES..........................................................................................A-1
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9252000898 Rev — BE1-50/51B-235/-236 General Information i
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
Time Overcurrent (51) Element.......................................................................................................... 1-2
Instantaneous Overcurrent A (50-A) Element .................................................................................... 1-3
Instantaneous Overcurrent B (50-B) Element .................................................................................... 1-3
Current Sensing Input ........................................................................................................................ 1-4
Frequency Response ......................................................................................................................... 1-6
Transient Response ........................................................................................................................... 1-6
Harmonic Rejection ............................................................................................................................ 1-6
Target Indicators ................................................................................................................................ 1-6
Output Contacts ................................................................................................................................. 1-6
Type Tests.......................................................................................................................................... 1-7
Environment ....................................................................................................................................... 1-7
Physical .............................................................................................................................................. 1-7
Figures
Figure 1-1. Current Sensing Input Derating Curve (BE1-50/51B-235)...................................................... 1-4
Figure 1-2. Current Sensing Input Derating Curve (BE1-50/51B-236)...................................................... 1-4
Figure 1-3. Current Sensing Input Burden (BE1-50/51B-235) .................................................................. 1-5
Figure 1-4. Current Sensing Input Burden (BE1-50/51B-236) .................................................................. 1-5
Figure 1-5. Harmonic Rejection................................................................................................................. 1-6
Tables
Table 1-1. ABB Relays Suitable for Direct Replacement .......................................................................... 1-1
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SECTION 1 •GENERAL INFORMATION
INTRODUCTION
BE1-50/51B-235 and BE1-50/51B-236 protective relays are direct replacements for Westinghouse/ABB
type CO relays. The BE1-50/51B-235 has a 5-ampere current sensing input. The BE1-50/51B-236 has a
1-ampere current sensing input. Compatible CO model numbers are listed in Table 1-1.
Table 1-1. ABB Relays Suitable for Direct Replacement
ABB Catalog Number Curve Type
CO-2∗11∗1N Short Time
CO-5∗11∗1N Long Time
CO-6∗11∗1N Definite
CO-7∗11∗1N Moderately Inverse
CO-8∗11∗1N Inverse
CO-9∗11∗1N Very Inverse
CO-11∗11∗1N Extremely Inverse
∗Any digit covering all pickup ranges except 50 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-235 or BE1-50/51B-236 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.
BE1-50/51B-235 and BE1-50/51B-236 relays are self-powered, compatible with 50 or 60 Hz power
systems, and have three protection elements: one time overcurrent (51) element and two instantaneous
overcurrent (50) elements. The 51 element offers timing characteristic curves similar to those used by GE
IAC and ABB relays.
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.
In addition, an integrating reset function is available to simulate the disk reset of electromechanical relays.
BE1-50/51B-235 and BE1-50/51B-236 overcurrent relays have the following standard features.
•Independent time and instantaneous elements
•A secure method to manually trip the breaker at the relay front panel
•Direct reading front panel controls
•Minimum pickup setting for safety during installation
•Time characteristics extend to a pickup multiple of 40
•Rugged draw-out construction with steel case
•Gravity latching targets retain indication without power
•Built-in accuracy eliminates internal adjustments
•Minimum transient overreach
•Field selectable characteristic curve selection similar to either GE IAC or ABB type curves
•Field selectable instantaneous or integrating reset
•Field selectable 50 or 60 Hz operation
•Field selectable 0.0 or 0.1 second, fixed, instantaneous delay
Internal switches provide for selecting system-operating frequencies of 50 or 60 Hz, instantaneous
element delays of 0.0 or 0.1 second, characteristic curve group selection for either GE IAC or ABB type
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curves, and instantaneous or integrating reset characteristics. Switch location and description is provided
in Section 2.
Advantages
BE1-50/51B-235 and BE1-50/51B-236 overcurrent relays have many advantages over other overcurrent
relays. The primary advantages are:
•Time characteristics are defined by equations and graphs
•Field selectable time characteristics
•Very low burden extends the linear range of the CTs
•Self powered from the sensed current
•Continuous automatic calibration
BE1-50/51B-235 and BE1-50/51B-236 overcurrent relays may be tested without removing the relay from
the case. Shorting contacts are provided for all current inputs when the connection plugs or relay chassis
is removed from the relay case.
SPECIFICATIONS
BE1-50/51B-235 and BE1-50/51B-236 electrical and physical specifications are listed in the following
paragraphs.
Time Overcurrent (51) Element
BE1-50/51B-235 Pickup
Setting Range: 0.5 to 15.9 Aac
Setting Increment: 0.1 Aac
Accuracy: Sum of ±2% and ±25 mAac
BE1-50/51B-236 Pickup
Setting Range: 0.1 to 3.18 Aac
Setting Increment: 0.02 Aac
Accuracy: Sum of ±2% and ±5 mAac
Dropout
Dropout occurs at 95% of pickup value.
Characteristic Curves
Available curve types follow IEEE Standard C37.112 (1996) and emulate standard GE IAC, ABB CO, and
BS142 curves. Appendix A, Characteristic Curves illustrates the available curves and lists the applicable
constants.
Curve Types: Short Inverse, Long Inverse, Definite Time, Moderately Inverse, Inverse,
Very Inverse, Extremely Inverse, BS142 Very Inverse, BS142 Extremely
Inverse, Fixed Time
Time Multiplier: 11 curves for each characteristic
Timing Accuracy: ±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.
Fixed Timing
Setting Range: 0.1 to 9.9 s
Setting Increment: 0.1 s
Timing Accuracy: ±1 cycle, ±2% of the time to trip for time dial settings ≥0.1.
Reset
Integrating: Simulates the disk reset of electromechanical relays and begins when
the current decreases below 95% of pickup. Appendix A, Characteristic
Curves illustrates the integrating reset characteristic curve and equation.
Instantaneous: Reset occurs within 16 ms of when the current decreases below 95% of
the pickup level.
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Instantaneous Overcurrent A (50-A) Element
BE1-50/51B-235 Pickup
Setting Range: 2 to 99 Aac
Setting increment: 1 Aac
Accuracy: Sum of ±2% and ±25 mAac
BE1-50/51B-236 Pickup
Setting Range: 0.4 to 19.8 Aac
Setting increment: 0.2 Aac
Accuracy: Sum of ±2% and ±5 mAac
Dropout
Dropout occurs at 95% of pickup value.
Time Delay
Switch selectable—no intentional delay (SW3-2 OFF) or a fixed delay of 100 ms (SW3-2 ON). Appendix
A, Characteristic Curves illustrates the characteristic curve for the 50-A and 50-B elements.
Instantaneous Overcurrent B (50-B) Element
BE1-50/51B-235 Pickup
Setting Range: 1 to 15.9 Aac
Setting increment: 0.1 Aac
Accuracy: Sum of ±2% and ±25 mAac
BE1-50/51B-236 Pickup
Setting Range: 0.2 to 3.18 Aac
Setting increment: 0.02 Aac
Accuracy: Sum of ±2% and ±5 mAac
Dropout
Dropout occurs at 95% of pickup value.
Time Delay
Fixed at no intentional delay. Appendix A, Characteristic Curves illustrates the characteristic curve for the
50-A and 50-B elements.
Reset Characteristic
Resets within 16 ms of when sensed current decreases below the pickup level.
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Current Sensing Input
BE1-50/51B-235
Continuous Rating: 14 Aac∗
1 Second Rating: 400 Aac
∗Continuous rating is 14 Aac for temperatures up to 45°C. See Figure 1-1 for derating curve.
Continuous Current
Current Sensing Input
0
2
4
6
8
10
12
14
16
-40-200 204060
Ambient Temperature (C)
Current (Aac)
Figure 1-1. Current Sensing Input Derating Curve (BE1-50/51B-235)
BE1-50/51B-236
Continuous Rating: 2.8 Aac∗
1 Second Rating: 80 Aac
∗Continuous rating is 2.8 Aac for temperatures up to 45°C. See Figure 1-2 for derating curve.
Continuous Current
Current Sensing Input
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
-40-200 204060
Ambient Temperature (C)
Current (Aac)
Figure 1-2. Current Sensing Input Derating Curve (BE1-50/51B-236)
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BE1-50/51B-235 Burden
Figure 1-3 illustrates the current sensing input burden characteristic.
At 0.5 Aac: 2.8 Ω
At 5.0 Aac: 0.3 Ω
BE1-50/51B-230 CT Burden
0
20
40
60
80
100
120
140
160
0 1020304050
Input Current (Amps)
Burden in VA (rms)
Figure 1-3. Current Sensing Input Burden (BE1-50/51B-235)
BE1-50/51B-236 Burden
Figure 1-4 illustrates the current sensing input burden characteristic.
At 0.1 Aac: 57.0 Ω
At 1.0 Aac: 6.9 Ω
BE1-50/51B-234 CT Burden
0
20
40
60
80
100
120
140
0246810
Input Current (Amps)
Burden in VA (rms)
Figure 1-4. Current Sensing Input Burden (BE1-50/51B-236)
BE1-50/51B-235 CT Burden
BE1-50/51B-236 CT Burden
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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 Rejection
Rejection of odd and even harmonics is illustrated in Figure 1-5.
Figure 1-5. Harmonic Rejection
Target Indicators
A gravity-latched, manually-reset, current-operated target indicator is provided for the time-overcurrent
(51) trip output and the instantaneous overcurrent A (50-A) trip output. A target indicator is not provided
for the 50-B trip output. The level of trip circuit current required to operate each target is individually
controlled by a circuit board jumper. See Section 2, Controls and Indicators for jumper locations and
function assignments
Minimum Operating Current
Jumper Position—Pins 1 and 2: 0.9 to 2.25 A ∗
Jumper Position—Pins 2 and 3: 80 mA to 200 mA ∗
∗Minimum operating current values. See Output Contacts for the maximum acceptable levels of
trip circuit currents.
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.
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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).
Terminal Assignments
51 Element: 1, 10
50-A Element: 1, 10
50-B Element: 2, 10
Type Tests
Isolation: IEEE C37.90
Transient Surge: IEEE C37.90.1
Radiated Interference: IEEE C37.90.2
Electrostatic Discharge: IEEE C37.90.3
Vibration: IEC 255-21-1
Shock and Bump: IEC 255-21-2
Environment
Operating Temperature: –40 to 70°C (–40 to 158°F)
Storage Temperature: –50 to 70°C (–58 to 158°F)
Physical
Weight: 6.1 lb (2.77 kg)
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9252000898 Rev — BE1-50/51B-235/-236 Controls and Indicators i
SECTION 2 •CONTROLS AND INDICATORS
TABLE OF CONTENTS
SECTION 2 •CONTROLS AND INDICATORS........................................................................................2-1
INTRODUCTION....................................................................................................................................2-1
FRONT PANEL CONTROLS AND INDICATORS.................................................................................2-1
CIRCUIT BOARD CONTROLS..............................................................................................................2-3
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 Controls and Indicators......................................................................................... 2-2
Table 2-2. Circuit Board Controls..............................................................................................................2-4
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