Basler BE1-60 User manual
INSTRUCTION MANUAL
FOR
VOLTAGE BALANCE RELAY
BE1-60
Publication: 9170700990
Revision: D 09/07
9170700990 Rev D BE1-60 Introduction i
INTRODUCTION
This instruction manual provides information about the operation and installation of the BE1-60 Voltage
Balance Relay. To accomplish this, the following information is provided:
•General Information and Specifications
•Controls and Indicators
•Functional Description
•Installation
•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.
ii BE1-60 Introduction 9170700990 Rev D
First Printing: May 1985
Printed in USA
© 1985, 1998, 2003, 2007 Basler Electric, Highland Illinois 62249 USA
All Rights Reserved
September 2007
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
PHONE +1 618.654.2341 FAX +1 618.654.2351
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.
9170700990 Rev D BE1-60 Introduction iii
REVISION HISTORY
The following information provides a historical summary of the changes made to the BE1-60 instruction
manual (9170700990). Revisions are listed in reverse chronological order.
Manual
Revision and Date Change
D, 09/07 •Added manual part number and revision to all footers.
•Updated Power Supply Burden data in Section 1.
•Updated Output Contact ratings in Section 1.
•Updated Target Indicator description in Section 3.
C, 06/03 •Changed unit of measure for single-phase sensing values from VL-N
and VL-L to Vac.
•Corrected terminal number error in Figure 4-8.
•Updated all applicable drawings to show redesigned case cover and
revised front panel.
B, 07/98 •Deleted reference to service manual (9170700620).
•Updated the dielectric test information.
•Corrected the timing specification.
•Changed input voltage range and burden data in Table 1-1.
•Corrected style chart.
•Added power supply information to Section 3.
•Updated the style of the manual.
iv BE1-60 Introduction 9170700990 Rev D
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9170700990 Rev D BE1-60 Introduction v
CONTENTS
SECTION 1 •GENERAL INFORMATION................................................................................................ 1-1
PURPOSE........................................................................................................................................... 1-1
APPLICATION .................................................................................................................................... 1-1
SETTING THE RELAY........................................................................................................................ 1-2
Setting Example for Sensing Input Types E and F....................................................................... 1-2
MODEL AND STYLE NUMBER.......................................................................................................... 1-3
Style Number Example................................................................................................................. 1-3
SPECIFICATIONS.............................................................................................................................. 1-3
Sensing......................................................................................................................................... 1-5
Pickup........................................................................................................................................... 1-5
Dropout......................................................................................................................................... 1-5
Timing........................................................................................................................................... 1-5
Power Supply................................................................................................................................ 1-5
Target Indicators........................................................................................................................... 1-5
Outputs......................................................................................................................................... 1-6
Shock............................................................................................................................................ 1-6
Vibration........................................................................................................................................ 1-6
Dielectric Strength........................................................................................................................ 1-6
Surge Withstand Capability.......................................................................................................... 1-6
Radio Frequency Interference (RFI)............................................................................................. 1-6
Fast Transient............................................................................................................................... 1-6
Impulse......................................................................................................................................... 1-6
Temperature................................................................................................................................. 1-6
UL Recognition............................................................................................................................. 1-6
GOST-R........................................................................................................................................ 1-6
Weight........................................................................................................................................... 1-6
Case Size ..................................................................................................................................... 1-6
SECTION 2 •CONTROLS AND INDICATORS ....................................................................................... 2-1
INTRODUCTION................................................................................................................................. 2-1
SECTION 3 •FUNCTIONAL DESCRIPTION........................................................................................... 3-1
INTRODUCTION................................................................................................................................. 3-1
STEP-DOWN TRANSFORMERS....................................................................................................... 3-1
FULL-WAVE RECTIFIERS AND INTEGRATORS............................................................................. 3-1
DIFFERENTIAL AMPLIFIERS............................................................................................................ 3-1
LIMIT SETTING .................................................................................................................................. 3-2
LIMIT COMPARATORS...................................................................................................................... 3-2
OUTPUTS........................................................................................................................................... 3-2
OUTPUT TEST PUSHBUTTONS....................................................................................................... 3-2
AUXILIARY OUTPUTS....................................................................................................................... 3-2
POWER SUPPLY ............................................................................................................................... 3-7
POWER SUPPLY STATUS OUTPUT................................................................................................ 3-2
TARGET INDICATORS ...................................................................................................................... 3-2
Internally Operated Targets.......................................................................................................... 3-2
Current Operated Targets ............................................................................................................ 3-2
SECTION 4 •INSTALLATION.................................................................................................................. 4-1
INTRODUCTION................................................................................................................................. 4-1
RELAY OPERATING GUIDELINES AND PRECAUTIONS ............................................................... 4-1
MOUNTING......................................................................................................................................... 4-1
CONNECTIONS.................................................................................................................................. 4-6
MAINTENANCE.................................................................................................................................. 4-7
STORAGE........................................................................................................................................... 4-7
SECTION 5 •TESTING ............................................................................................................................ 5-1
OPERATIONAL TEST PROCEDURE................................................................................................ 5-1
vi BE1-60 Introduction 9170700990 Rev D
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9170700990 Rev D BE1-60 General Information 1-1
SECTION 1 •GENERAL INFORMATION
INTRODUCTION
The BE1-60 Voltage Balance Relay provides a high-speed response to block other devices from incorrect
operation resulting from a blown fuse or other fault in a potential transformer circuit. The BE1-60 detects
these conditions, initiates corrective action, and indicates the problem and location.
Equipment benefiting from BE1-60 protection includes overcurrent relays (voltage controlled or voltage
restrained types), impedance measuring relays, synchronizing relays, voltage regulators, and static
excitation systems.
APPLICATION
In the typical application shown in Figure 1-1, a generator is equipped with a static exciter and is
protected by voltage controlled or voltage restrained time-overcurrent relays and other devices.
52
POWER
POTENTIAL
TRANSFORMER
SHUTDOWN
CONTACTOR
POWER
INPUT
CKT 1
BE1-60
CKT 2
SENSING
INPUT
STATIC
EXCITER
SENSING
POTENTIAL
TRANSFORMER
GEN
BE1-51/27C
OR
BE1-51/27R
60
FIELD D2817-15
07-14-98
Figure 1-1. Typical Application of BE1-60 Relay
1-2 BE1-60 General Information 9170700990 Rev D
If a power potential transformer fuse opens, the resulting unbalanced condition may cause excessive
heating in the power stage of the static exciter. This condition would warrant an alarm indication and an
orderly shutdown of the unit. The BE1-60 Circuit 1 output would accomplish this task and the Circuit 1
target would indicate that an open power potential transformer fuse had initiated the correct shutdown
sequence.
If a sensing potential transformer fuse opens, the static exciter (with three-phase sensing) output would
increase to maximum in an attempt to restore the sensed voltage to the proper level. For this condition,
the BE1-60 would initiate an emergency shutdown of the unit and issue an alarm. The BE1-60 Circuit 2
output would accomplish this task and the Circuit 2 target would indicate that an open sensing potential
transformer fuse had initiated the correct shutdown sequence.
Also, since the same potential source provides the control1or restraint2input to the time-overcurrent
relays, false tripping of the unit may result due to operation of the overcurrent relays. This is undesirable
because the overcurrent relay target would give a false indication of the reason for tripping. To prevent
this, the BE1-60 Circuit 2 output would be required to block operation of the overcurrent relays. This
would be accomplished by opening a normally-closed contact from the BE1-60, which is in series with the
tripping outputs of the overcurrent relays.
1If the overcurrent functions were voltage controlled and the output current exceeded the relay
pickup setting, a loss of power potential would allow this overcurrent function to pick up and
start timing. Without the inhibit from the BE1-60, tripping would result.
2If the overcurrent functions were voltage restrained, the loss of restraint potential would
increase the sensitivity of the relay (2½ times setting) and the relay would pick up and start
timing. Without the inhibit from the BE1-60, tripping would result.
SETTING THE RELAY
When setting the relay, consideration should be given to the maximum voltage excursions permitted for
normal operating conditions. For example, if the power potential transformer output varies 5% from
machine no-load to machine full-load, the setting must accommodate this fluctuation.
Also note that since both BE1-60 inputs (Circuit 1 and Circuit 2) are monitoring essentially the same
voltage, BE1-60 tripping will not occur for system faults.
BE1-60 relays with sensing input type E (single-phase to three-phase wye) or F (single-phase to three-
phase delta) apply the three-phase input to an internal, Scott (T-connected) transformer. This transformer
produces a single-phase voltage that is proportional to the average of the three-phase voltages shown in
Figure 1-2. This decreases the relay’s sensitivity as illustrated by the following example.
CIRCUIT 1
INPUT CIRCUIT 2
INPUT
A
B
C
D2817-19
07-17-98
(V1) - V2A+V2B+V2C =ΔV
3
Figure 1-2. Internal Voltage Sensing and Measurement for Sensing Types E and F
Setting Example for Sensing Input Types E and F
If a fuse blows in phase C of Circuit 2, an apparent difference of 40 volts is produced within the relay.
()
40
3
0120120
120 =
⎟
⎠
⎞
⎜
⎝
⎛++
−
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