Basler BE1-50/51M-222 User manual

RELAY
OVERCURRENT
BE1-50/51M-222
S
T
U
I
N
+
T
E
N
S
S
T
I
N
U
+
E
N
T
T
H
S
S
H
T
T
N
E
+
U
N
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T
S
(0.5 MIN. SET)
PICKUP
DIAL
PICKUP
MANUAL TRIP
TIME
MANUAL TRIP
PICKUP
0
0
0
0
0
Hi
g
hland, Illinois
Basler Electric
R
S
0
CURVE
INST
TIME
RESET
D2644-12
08-18-97
INSTRUCTION MANUAL
FOR
OVERCURRENT RELAY
BE1-50/51M-222
Publication Number: 9 2520 00 984
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 installation
of the BE1-50/51M-222 Overcurrent Relay. To accomplish 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: August 1997
Printed in USA
© 1997, 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. Shouldfurtherinformationberequired,contactBaslerElectric
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 ..................................... 1-8
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
Outline Dimensions ....................................... 4-2
Panel Drilling Diagram, C1 Case ............................ 4-3
Connections ............................................ 4-4
AC Input Connections .................................. 4-4
DC Control Connections ................................ 4-5
BE1-50/51M-222 Overcurrent Relay, Rear View ................ 4-6
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
BE1-50/51M-222OvercurrentRelaysaremicroprocessorbased,non-directionalphaseorgroundrelaysthat
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. The BE1-50/51M-222 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.
Integratingresetfunctionsareavailabletosimulatethediskresetofelectromechanicalrelays. BE1-50/51M-
222 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. BE1-50/51M-222
Overcurrent Relays must be removed from the case and installed on a test bench for testing. Shorting
contacts are provided for all current inputs when the relay chassis is removed from the relay case. Figure
1-1 shows the front panel of the BE1-50/51M-222 Overcurrent Relay, in a C1, vertical mount case.
BE1-50/51M-222OvercurrentRelayshavemanyadvantagesoverotherovercurrentrelays. Thefiveprimary
advantages are:
&Time characteristics are defined by equations and graphs.
&Field selectable time characteristics.
&Very low burden.
&Self powered from the sensed current.
&Continuous automatic calibration.

BE1-50/51M-222 General Information
1-2
RELAY
OVERCURRENT
BE1-50/51M-222
S
T
U
I
N
+
T
E
N
S
S
T
I
N
U
+
E
N
T
T
H
S
S
H
T
T
N
E
+
U
N
I
T
S
(0.5 MIN. SET)
PICKUP
DIAL
PICKUP
MANUAL TRIP
TIME
MANUAL TRIP
PICKUP
0
0
0
0
0
Hi
g
hland, Illinois
Basler Electric
R
S
0
CURVE
INST
TIME
RESET
D2644-12
08-18-97
Figure 1-1. BE1-50/51M-222 Overcurrent Relay, C1 Case
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

BE1-50/51M-222 General Information
1-3
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
SPECIFICATIONS
BE1-50/51M-222 Overcurrent Relays have 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.

BE1-50/51M-222 General Information
1-4
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 sensitivestate and may
be used as a safety setting.
INST Dropout Dropout occurs at 95% of pickup value.
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

BE1-50/51M-222 General Information
1-5
Harmonic Response BE1-50/51M-222 harmonic rejection is illustrated in Figure 1-4.
Figure 1-4 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.
Figure 1-4. Harmonic Response
INST Characteristics BE1-50/51M-222 instantaneous characteristic curves are similar to
standard electromechanical instantaneous units. However, the time to trip
for ground applications is slightly longer than that for phase applications to
allow time to power-up the relay. Longer trip time for ground applications
is beneficial because it helps to avoid nuisance trips.
For phase applications, the maximum time to trip is 3.5 cycles at a pickup
multiple of 1.0, and 1.5 cycles at a pickup multiple of 3.0. The
corresponding times for ground applications are 4.5 and 1.75 cycles.
Figure 1-5 shows the instantaneous characteristic curves for maximum
time to trip.
Additional delays of 0.1, 0.2, or 0.3 seconds may be added with internal
switches SW8-2 and -3. These delays apply to both phase and ground
applications. Closing switch SW8-2 provides an additional delay of 0.1
second. Closingswitch SW8-3provides an additionaldelay of0.2 second.
Closing both switches SW8-2 and -3 provides an additional delay of 0.3
second. Section 2 illustrates the location of SW8.
Time Characteristics Nine inverse time functions and one fixed time function can be selected by
a front panel switch.