Basler BE1-50/51B-225 User manual

INSTRUCTION MANUAL
FOR
OVERCURRENT RELAYS
BE1-50/51B-214 AND BE1-50/51B-225
Publication: 9252000994
Revision: G 03/2001
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BE1-50/51B-214/-225 - Introduction i
W A R N I N G !
To avoid personal injury or equipment damage, only qualified
personnel should perform the procedures presented in this manual.
INTRODUCTION
This manual provides information concerning the operation and installation of the BE1-50/51B-214 and BE1-
50/51B-225 Overcurrent Relays. To accomplish this, the following is provided.
Specifications
Functional description
Mounting information
Setting procedure/example
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ii BE1-50/51B-214/-225 - Introduction
CONFIDENTIAL INFORMATION
OF BASLER ELECTRIC COMPANY, HIGHLAND, IL. IT IS LOANED FOR
CONFIDENTIALUSE,SUBJECTTORETURNONREQUEST,ANDWITHTHEMUTUAL
UNDERSTANDINGTHATITWILLNOTBEUSEDINANYMANNERDETRIMENTALTO
THE INTEREST OF BASLER ELECTRIC COMPANY.
First Printing: July 1995
Printed in USA
© 1995 - 2001 Basler Electric Co., Highland, IL 62249
March 2001
Itisnottheintentionofthismanualtocoveralldetailsand variationsinequipment,nordoesthis
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 Company, Highland, Illinois.
BASLER ELECTRIC
ROUTE 143, BOX 269
HIGHLAND, IL 62249 USA
http://www.basler.com, [email protected]
PHONE [phone] FAX [phone]
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BE1-50/51B-214/-225 - Introduction iii
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SECTION 1 GENERAL INFORMATION ....................... 1-1
Description ........................................................ 1-1
Application ........................................................ 1-1
Features ........................................................ 1-2
Advantages ........................................................ 1-2
Specifications ........................................................ 1-2
Characteristic Curves ................................................. 1-10
SECTION 2 HUMAN MACHINE INTERFACE ................... 2-1
SECTION 3 FUNCTIONAL DESCRIPTION ..................... 3-1
General ........................................................ 3-1
Functional Description ................................................. 3-1
Sensing Input ..................................................... 3-1
Power Supply ..................................................... 3-1
Instantaneous Signal ............................................... 3-1
Time Signal ....................................................... 3-1
Microprocessor .................................................... 3-1
Power-Off Sensing ................................................. 3-1
Outputs ........................................................ 3-2
SECTION 4 INSTALLATION ................................ 4-1
General ........................................................ 4-1
Dielectric Test ........................................................ 4-1
Mounting ........................................................ 4-1
Factory Settings ...................................................... 4-1
Installation ........................................................ 4-1
Application Coordination ................................................ 4-2
Connections ........................................................ 4-3
AC Input Connections .............................................. 4-3
DC Control Connections ............................................ 4-4
SECTION 5 TESTING ...................................... 5-1
General ........................................................ 5-1
Dielectric Test ........................................................ 5-1
Operational Test Procedure ............................................. 5-1
Test Equipment Required ........................................... 5-1
Pickup and Timing Test Setup ........................................ 5-2
Target Operational Test Setup ........................................ 5-2
Test Procedure, Models BE1-50/51B-214 (Five Ampere Sensing Input) ....... 5-3
Test Procedure, Models BE1-50/51B-225 (One Ampere Sensing Input) ....... 5-5
Setting the Relay ...................................................... 5-8
Periodic Tests ........................................................ 5-8
General .......................................................... 5-8
Periodic Test ...................................................... 5-8
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iv BE1-50/51B-214/-225 - Introduction
CONTENTS- Continued
SECTION 6 MAINTENANCE .............................6-1
General .............................................................6-1
In-House Repair ......................................................6-1
Storage .............................................................6-1
Periodic Tests ........................................................6-1
General ..........................................................6-1
Periodic Test ......................................................6-1
SECTION 7 MANUAL CHANGE INFORMATION .............7-1
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BE1-50/51B-214/-225 - General Information 1-1
SECTION 1 • GENERAL INFORMATION
DESCRIPTION
BE1-50/51B-214andBE1-50/51B-225 OvercurrentRelaysaredirectreplacementsforGeneralElectric,IAC
relays. Specific IAC relays by model number are shown in Table 1-1. To replace an existing IAC relay,
perform the following steps.
• Select the desired relay settings on your new BE1-50/51B-214/-225 relay.
• Remove the existing IAC relay.
• Attach the cover adapter to the existing case.
• Insert the new BE1-50/51B-214/-225 relay.
• Reinstall the existing connection plug.
• Install the new Basler Electric cover.
BE1-50/51B-214/-225 Overcurrent Relays are self-powered,microprocessor based, non-directional phase
or ground relays that monitor the magnitude of a single phase ac current to provide accurate instantaneous
and timeovercurrentprotectionfor 50hertz or 60 hertz power systems. One modelcovers ten popular time
characteristics and a wide range of pickup settings.
Table 1-1. G.E. IAC Relays Suitable For Direct Replacement
IAC Model Number Curve Type
12IAC51A***A Inverse
12IAC51B***A Inverse with Instantaneous
12IAC53A***A Very Inverse
12IAC53B***A Very Inverse with Instantaneous
12IAC55A***A Short Time
12IAC55B***A Short Time with Instantaneous
12IAC66A**A Long Time
12IAC66B**A Long Time with Instantaneous
12IAC77A***A Extremely Inverse
12IAC77B***A Extremely Inverse with Instantaneous
NOTE: * = Any digit covering all pickup ranges and 50 hertz or 60 hertz models.
APPLICATION
BE1-50/51B-214/-225 Overcurrent Relays with a wide range of pickup settings and front panel selectable
timecharacteristicspermitapplicationsinvolving coordinationwithfuses,reclosers,coldloadpickup,motor
starting, and fixed time requirements. Also, a field selectable, integrating reset function that simulates the
disk reset of electromechanical relays or instantaneous reset to avoid ratcheting makes the BE1-50/51B-
214/-225 Overcurrent Relays ideal for almost every application.
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1-2 BE1-50/51B-214/-225 - General Information
Features
BE1-50/51B-214/-225 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.
• Magnetic 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 hertz operation.
• Field selectable 0.0 or 0.1 second, fixed, instantaneous delay.
• One ampere and five ampere sensing input models.
Internal switches provide for selecting system operating frequencies of 50 or 60 hertz, instantaneous
element delays of 0.0 or 0.1 second, characteristic curve group selection for either GE IAC or ABB type
curves, and instantaneous or integrating reset characteristics. Switch location and description is
provided in Section 2. Table 1-2 provides model number to nominal current sensing input information.
Table 1-2. Model Number To Nominal Current Sensing Input
Model Number Nominal Current Sensing Input
Sensing Input Range (Amperes)
TIME Increments INST Increments
BE1-50/51B-214 5 amperes 0.5 - 15.9 0.1 1.0 - 99.0 1.0
BE1-50/51B-225 1 ampere 0.1 - 3.18 0.02 0.2 - 19.8 0.2
Advantages
BE1-50/51B-214OvercurrentRelayshavemanyadvantagesoverotherovercurrentrelays. Thefiveprimary
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-214 Overcurrent Relays may be tested without removing the relay from the case. Shorting
contacts are provided for all current inputs when the connectionplugs or relay chassis is removed from the
relay case.
SPECIFICATIONS
BE1-50/51B-214/-225 Overcurrent Relays have the following features and capabilities.
Current Sensing Input
1 Ampere Unit Continuous current: 2.8 amperes. One second current: 80 amperes.
5 Ampere Unit Continuous current: 14 amperes. One second current: 400 amperes.
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BE1-50/51B-214/-225 - General Information 1-3
TIME PICKUP Range Setting theTIMEPICKUP to the minimum pickup (0.5 ampere), places the
relay in the most sensitive state and may be used as a safety setting.
1 Ampere Unit 0.1 to 3.18 amperes in 0.02 ampere steps.
5 Ampere Unit 0.5 to 15.9 amperes in 0.1 ampere steps.
TIME Dropout Dropout occurs at 95% of pickup value.
TIME PICKUP
Accuracy The timing accuracy is the sum of+1 cycle +2%. This is over the range of
1.3 to 40 times tap. This accuracy is for a given measured multiple oftap.
The measurement ofthe multipleof taphas an accuracy that is the sum of
+2% +25 milliampere for 5 ampere units and +2% +5 milliamperes for 1
ampere units.
Example: (5 ampere unit)
PU Setting: 5 amperes
Current Applied: 6.5 amperes
+ Multiple Tolerance: 6.655 amperes
- Multiple Tolerance: 6.345 amperes
Time Curve: E
Time Dial: 5.0
Minimum Time Using 6.655 amperes: 46.5470 seconds
Maximum Time Using 6.345 amperes: 61.3968 seconds
Curve Time Using 6.5 amperes: 53.1800 seconds
TIME PICKUP
Accuracy
1 Ampere Unit ±2% ±5 milliamperes at or above 0.1 ampere settings.
5 Ampere Unit ±2% ±25 milliamperes at or above 0.5 ampere settings.
Frequency Response A change of ±5 hertz from the nominal 50/60 hertz current causes less
than 0.5% change in the current required for pickup.
TIME DIAL Range
1 Ampere Unit 0.0 to 9.9, in 0.1 steps.
5 Ampere Unit 0.0 to 9.9, in 0.1 steps.
INST PICKUP Range Setting the INST PICKUP to the minimum pickup (1.0 ampere), places the
relay in the most sensitive state and may be used as a safety setting.
1 Ampere Unit 0.2 to 19.8 amperes in 0.2 ampere steps.
5 Ampere Unit 1 to 99 amperes in 1 ampere steps.
INST Dropout Dropout occurs at 95% of pickup value.
INST PICKUP
Accuracy
1 Ampere Unit ±2% ±5 milliamperes at or above 0.2 ampere settings.
5 Ampere Unit ±2% ±25 milliamperes at or above 1.0 ampere settings.
Frequency Response A change of ±5 hertz from the nominal 50/60 hertz current causes less
than 0.5% change in the current required for pickup.
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1-4 BE1-50/51B-214/-225 - General Information
Figure 1-1. Device Burden Characteristics
INSTTransientResponse Lessthan10%overreachwithsystemtimeconstantsupto 40 milliseconds
Burden Burden is non-linear. (Figure 1-1 illustrates the device burden.)
1 Ampere Unit At 0.1 amperes, Z = 120 ohms. At 1.0 ampere, Z = 5 ohms.
5 Ampere Unit At 0.5 amperes, Z = 4.8 ohms. At 5.0 amperes, Z = 0.2 ohms.
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BE1-50/51B-214/-225 - General Information 1-5
Figure 1-2. Harmonic Rejection
Harmonic Response Harmonic rejection is illustrated in Figure 1-2.
Figure 1-2 shows that a relay set for one ampere pickup would pickup at
0.96 ampere on a current containing 40% seventh harmonic. This
corresponds to a ten-to-one rejection ratio. Other conditions may be
evaluated in the same manner.
INST 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 1-3 shows the instantaneous characteristic curves for maximum
time to trip.
An additional fixed delay of 0.1 second may be added with internal switch
SW3-2. Thisdelayappliestobothphaseandgroundapplications. 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-214/-225 relays may be set
lowerthantheinstantaneouselementinIACrelaysandstillhavethesame
reach. This is because the BE1-50/51B-214/-225 instantaneous element
effectively eliminates the fault current transient overreach components.
When calculating BE1-50/51B-214/-225 relay instantaneous element
settings, calculate the symmetrical value without any adder for transient
overreach.
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