Basler BE1-50/51B-217 User manual

0
0S 0 00
0
RESET
PICKUP
OVERCURRENT RELAY
BE1-50/51B-217
Highland, Illinois
Basler Electric
R
PICKUP
PICKUP
(0.5 MIN. SET)TIME DIAL
TENTHSUNITS ++ TENTHSUNITS CURVE
INST
TIME
MANUAL TRIPMANUAL TRIP
+UNITSTENS
INST
TIME
SOLID STATE PROTECTIVE RELAY
D2718-16.vsd
12-14-99
INSTRUCTION MANUAL
FOR
OVERCURRENT RELAY BE1-50/51B-217
Publication: 9252000980
Revision: A 12/99

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
installationoftheBE1-50/51B-217OvercurrentRelay. Toaccomplish
this, the following is provided.
Specifications
Functional description
Mounting information
Setting procedure/example.

ii
CONFIDENTIAL INFORMATION
OF BASLER ELECTRIC COMPANY, HIGHLAND, IL. 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 COMPANY.
First Printing: April 1996
Printed in USA
© 1995, 1999, Basler Electric Co., Highland, IL 62249
December 1999
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 Company, Highland, Illinois.
BASLER ELECTRIC, BOX 269 HIGHLAND, IL 62249 USA
PHONE [phone] FAX [phone]

iii
CONTENTS
SECTION 1 GENERAL INFORMATION 1-1
Description ..............................................1-1
Application ..............................................1-1
General .............................................1-1
Load Demand Curve ...................................1-2
Specifications ............................................1-3
Characteristic Curves ......................................1-9
SECTION 2 CONTROLS AND INDICATORS 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 .....................................3-2
Outputs .............................................3-2
SECTION 4 INSTALLATION 4-1
General .................................................4-1
Dielectric Test ............................................4-1
Mounting ................................................4-1
Panel Drilling Diagram, S1 Case, (Semi-Flush Mount) .............4-2
Outline Dimensions For S1 Case (Semi-Flush Mount) .............4-3
Panel Drilling Diagram, S1 Case, (Projection Mount) ..............4-3
Outline Dimensions, BE1-50/51B, S1 Case (Projection Mount) ......4-4
Connections .............................................4-5
AC Input Connections ..................................4-5
DC Control Connections And Jumper Configuration Terminations 4-6
BE1-50/51B Overcurrent Relay, Rear View .....................4-7
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 .......................................5-3
Setting the Relay .........................................5-6
Periodic Tests ............................................5-6
General .............................................5-6
Periodic Test .........................................5-6

iv
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 ......................................... 6-2
SECTION 7 MANUAL CHANGE INFORMATION 7-1

1-1
SECTION 1
GENERAL INFORMATION
DESCRIPTION
BE1-50/51B Overcurrent Relays are microprocessor based, non-directional phase or ground relays that
monitor the magnitude of a single phase ac current to provide accurate instantaneous and time
overcurrent protection for 50 hertz or 60 hertz power systems. BE1-50/51B-217 Overcurrent Relay is a
special, modified relay with software for a
Load Demand Characteristic Curve in place of the short
inverse standard curve. To select the
Load Demand Characteristic Curve , position the CURVE select
switch to position S.
APPLICATION
General
The 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. Integrating reset functions are available to simulate the disk reset of electromechanical
relays. BE1-50/51B 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 instantaneous or integrating reset.
&Field selectable 50 or 60 hertz operation.
&Field selectable fixed instantaneous delay (0.0, 0.1, 0.2, or 0.3 second).
Individual models are available for 1 ampere and 5 amperes sensing input currents and installed in A1 or
S1 cases. BE1-50/51B-217 Overcurrent Relays may be tested without removing the relay from the case.
Shorting contacts are provided for all current inputs when the connection plug or relay chassis is
removed from the relay case. Figure 1-1 shows the front panel of the BE1-50/51B-217 Overcurrent
Relay.
BE1-50/51B-217 Overcurrent Relays have many advantages over other overcurrent relays. The four
primary advantages are:
&Field selectable time characteristics.
&Very low burden.
&Self powered from the sensed current.
&Continuous automatic calibration.

BE1-50/51B-217 General Information
1-2
RESET
BE1-50/51B-217
OVERCURRENT RELAY
R
Basler Electric
Highland, Illinois
PICKUP
PICKUP
PICKUPME DIAL
TENTHSUNITS
++
TENTHS
S CURVE
INST
TIME
TEST TRST TRIP
+
UTENS
INST
TIME
0
0S 0
0
12-14-99
D2718-17.vsd
Figure 1-1. BE1-50/51B Overcurrent Relay, S1 Case

BE1-50/51B-217 General Information
1-3
Load Demand Curve
Scenario
Configure the relay such that when the sensed current is:
1.05 times pickup Time to trip 1.0 hour
1.2 times pickup Time to trip 1.0 hour
1.5 times pickup Time to trip 2.0 minutes
4.0 times pickup Time to trip 0.2 seconds
6.0 times pickup Time to trip 0.2 seconds
Settings
Position the following switches as designated. (Switch locations are shown in Section 2, Controls And
Indicators
.) Figure 1-2 is a graph showing the timing for the application scenario.
SW8-1 Select nominal operating frequency
SW8-2 OFF (open) no instantaneous delay
SW8-3 OFF (open) no instantaneous delay
SW8-4 ON (closed) integrating reset selected
TIME DIAL 4.0
CURVE S
TIME PICKUP Select preferred time pickup level
INST PICKUP Select preferred instantaneous pickup level
SPECIFICATIONS
BE1-50/51B-217 Overcurrent Relay has the following features and capabilities.
Current Sensing Input Continuous current: 14 amperes. One second current: 400 amperes.
TIME PICKUP Range 0.5 to 15.9 amperes in 0.1 ampere steps. Setting the TIME PICKUP to
the minimum pickup (0.5 ampere), places the relay in the most sensitive
state and may be used as a safety setting.
TIME Dropout Dropout occurs at 95% of pickup value.
TIME PICKUP
Accuracy ±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 0.0 to 9.9, in 0.1 steps.
INST PICKUP Range 1 to 99 amperes in 1 ampere steps. Setting the INST PICKUP to the
minimum pickup (1.0), places the relay in the most sensitive state and
may be used as a safety setting.
INST Dropout Dropout occurs at 95% of pickup value.

BE1-50/51B-217 General Information
1-4
0.01
0.1
1
10
100
1000
10000
11040
Instantaneous
Tap = 5 amps.
Time Tap = 1amp.
Curve S
Time Dial 4.0
1
2
3
4
5
MULTIPLE OF PICKUP
TIME IN SECONDS
Figure 1-2. Load Demand Characteristic Curve

BE1-50/51B-217 General Information
1-5
INST PICKUP
Accuracy ±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.
INST Transient Response Less than 10% overreach with system time constants up to 40
milliseconds
Burden Burden is non-linear. At 0.5 amperes, Z = 4.8 ohms. At 5.0 amperes,
Z = 0.2 ohms. (Figure 1-3 illustrates the device burden.)
Figure 1-3. Device Burden Characteristics