Basler BE1-25 User manual

INSTRUCTION MANUAL
for
SYNC-CHECK RELAY
BE1-25
Publication: 9 1702 00 990
Revision: M 02/2001
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BE1-25 Introduction i
INTRODUCTION
This manual provides information concerning the operation and installation of BE1-25 Sync-Check Relays.
To accomplish this, the following is provided.
•Specifications
•Functional Description
•Mounting Information
•Testing Procedures
WARNING!
TO AVOID PERSONAL INJURY OR EQUIPMENT DAMAGE, ONLY QUALIFIED
PERSONNEL SHOULD PERFORM THE PROCEDURES PRESENTED IN THIS
MANUAL.
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ii BE1-25 Introduction
First Printing: 1995
Printed in USA
© 1995 - 2001 Basler Electric Co., Highland, IL 62249
February 2001
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.
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
ROUTE 143, BOX 269
HIGHLAND, IL 62249 USA
http://www.basler.com, [e-mail]
PHONE [phone] FAX [phone]
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BE1-25 Introduction iii
CONTENTS
SECTION 1 •GENERAL INFORMATION ................................................................................................. 1
INTRODUCTION ....................................................................................................................................... 1
DESCRIPTION .......................................................................................................................................... 1
APPLICATION ........................................................................................................................................... 1
SYNC-CHECK FUNCTION ....................................................................................................................... 1
CONTACT SENSING ................................................................................................................................ 2
VOLTAGE MONITOR OPTIONS............................................................................................................... 2
Mode Switches ....................................................................................................................................... 2
Condition Switches................................................................................................................................. 3
Voltage Difference.................................................................................................................................. 3
Option 2-R, 2-T, or 2-U (Phasor Voltage Difference) .............................................................................4
Option 2-A, 2-B, or 2-C (Average Voltage Difference) ........................................................................... 5
Output Relay .......................................................................................................................................... 6
OTHER OPTIONS ..................................................................................................................................... 7
Expandable Window............................................................................................................................... 7
External Condition Switches................................................................................................................... 7
Push-to-Energize Output Pushbuttons................................................................................................... 7
MODEL AND STYLE NUMBER................................................................................................................. 7
Style Number Example........................................................................................................................... 7
SPECIFICATIONS ..................................................................................................................................... 9
SECTION 2 •HUMAN-MACHINE INTERFACE ........................................................................................ 1
CONTROLS AND INDICATORS ............................................................................................................... 1
SECTION 3 •FUNCTIONAL DESCRIPTION ............................................................................................ 1
GENERAL.................................................................................................................................................. 1
FUNCTIONAL DESCRIPTION .................................................................................................................. 1
Step-Down Transformers ....................................................................................................................... 1
Zero-Cross and Phase Difference Measurement................................................................................... 1
Comparator ............................................................................................................................................ 1
Timer ...................................................................................................................................................... 1
Minimum Voltage Detection ................................................................................................................... 2
Contact Sensing Options ....................................................................................................................... 2
Power Supply ......................................................................................................................................... 2
Power Supply Status Output Option ...................................................................................................... 3
Voltage Monitor Options......................................................................................................................... 3
Target Indicator Option .......................................................................................................................... 4
SECTION 4 •INSTALLATION...................................................................................................................1
GENERAL.................................................................................................................................................. 1
RELAY OPERATING PRECAUTIONS ...................................................................................................... 1
DIELECTRIC TEST ................................................................................................................................... 1
MOUNTING ............................................................................................................................................... 1
Relay ...................................................................................................................................................... 1
Resistor Module ..................................................................................................................................... 1
Contact Sensing Module ........................................................................................................................ 2
CONNECTIONS ........................................................................................................................................ 7
SECTION 5 •TESTING.............................................................................................................................. 1
GENERAL.................................................................................................................................................. 1
RELAY OPERATING PRECAUTIONS ...................................................................................................... 1
SWITCH SETTINGS.................................................................................................................................. 1
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iv BE1-25 Introduction
Setting Time Delay or Phase Angle ....................................................................................................... 1
Condition and Mode Switches................................................................................................................ 2
OPERATIONAL TEST PROCEDURE .......................................................................................................3
Preliminary Settings ............................................................................................................................... 3
Test Procedure....................................................................................................................................... 4
NORMAL Mode Testing .........................................................................................................................5
NOT OV Testing..................................................................................................................................... 7
SECTION 6 •MAINTENANCE................................................................................................................... 1
GENERAL.................................................................................................................................................. 1
IN-HOUSE REPAIR ................................................................................................................................... 1
STORAGE ................................................................................................................................................. 1
TEST PLUG ............................................................................................................................................... 1
TEST PLUG ADAPTER ............................................................................................................................. 2
General................................................................................................................................................... 2
Assembling Adapter to Test Plug........................................................................................................... 3
If Test Plug Adapter is Unavailable ........................................................................................................ 3
SECTION 7 •MANUAL CHANGE INFORMATION ..................................................................................1
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BE1-25 General Information 1-1
SECTION 1 •GENERAL INFORMATION
INTRODUCTION
These instructions provide information concerning the operation and installation of BE1-25 Sync-Check
Relays. To accomplish this, the following is provided:
•Specifications
•Functional characteristics
•Mounting information
•Setting procedures and examples
Relays with a Type T power supply require a Contact Sensing Module, which comes supplied with its own
instructions, publication 9 1702 06 990.
WARNING!
To avoid personal injury or equipment damage, only qualified personnel should perform
the procedures presented in these instructions.
These instructions may be used in place of all earlier editions. For change information, see Section 7.
It is not the intention of these instructions 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 Customer Service, Basler Electric Company, Highland, IL.
DESCRIPTION
BE1-25 Sync-Check Relays are solid-state synchronism check relays designed to permit breaker closure
when the desired maximum phase angle conditions have held for a specified minimum time. The
maximum allowable phase angle and time delay requirements can be set on front panel thumbwheel
switches. Five voltage measuring options are available that identify significant line and bus voltage
conditions, and this information is used to influence the relay output.
APPLICATION
BE1-25 Sync-Check Relays are recommended for situations that require verification of synchronism prior
to closing a circuit breaker. Typical applications are:
•Paralleling a generator to a system.
•Reestablishing a connection between two parts of a power system.
•Supervising fast transfer schemes, where fast pickup and dropout of the phase measuring circuit
are required.
If optional voltage measuring circuits are incorporated, the BE1-25 can determine whether an input is live,
dead, or in an overvoltage state.
SYNC-CHECK FUNCTION
NOTE
Voltage sensing circuits are guaranteed to operate at a minimum voltage of 60 volts.
They are guaranteed not to operate at voltages less than 20 volts. Some units may
operate at voltages in between these two levels because of the individual characteristics
of specific components. Minimum voltage detection is usually in the range of 45 to 55
volts.
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1-2 BE1-25 General Information
BE1-25 Sync-Check function measures the phase angle between single-phase voltages of line and bus.
Then sync-check verifies that this angle is less than the front panel PHASE ANGLE selector setting. If the
measured angle has met this criteria for the time period defined by the front panel TIME DELAY setting,
the SYNC output contact closes.
The allowable phase angle is adjustable over the range of 1 to 99 degrees. The time delay is adjustable
over either of two ranges: 1 to 99 cycles, 50/60 hertz (using the bus frequency as the reference), or 0.1 to
99 seconds (using the internal crystal controlled oscillator as the reference).
An optional target may be specified to indicate operation of the Sync-Check function.
CONTACT SENSING
To control operation of the relay, an input from the breaker auxiliary 52b contact is required to signal the
breaker status. If the breaker is open, the relay is enabled to perform its function. When the breaker
closes, the 52b input changes state and causes the relay to terminate its close signal.
Two configurations of the 52b contact sensing input are available to provide additional flexibility for the
protection circuit designer:
•Isolated contact sensing monitors a current supplied by the relay through an isolated contact.
•Non-isolated contact sensing monitors the presence of voltage at its input due to the closure of a
contact.
See Figure 4-10 for typical control circuit connections for each configuration. Also see Figure 4-11 if a
Type T power supply has been selected.
VOLTAGE MONITOR OPTIONS
Mode Switches
Two Mode switches are located on the Voltage Monitor card. Mode Switch No. 1 serves the bus Voltage
Monitor function. Mode Switch No. 2 serves the line Voltage Monitor function. Mode switch positions are
as follows:
NORMAL Mode (Up) - allows measuring elements to establish live and dead reference levels for
the input level.
NOT-OV Mode (Down) - allows measuring elements to establish live and Not-Overvoltage
reference levels for the input level.
When a Mode Switch is in the NORMAL Mode position (Up), a dead level is defined as a monitored
voltage level below the DEAD reference setting. See Figure 1-1 for voltage monitor acceptance zones. A
live level is defined as a monitored voltage above the LIVE reference setting.
When a Mode Switch is in the NOT-OV Mode position (Down), a dead level is defined as a monitored
voltage less than the LIVE reference setting, and a live level is defined as a monitored voltage greater
than the LIVE reference setting, but less than the NOT-OV setting. (An input is considered to be over-
voltage when it exceeds the NOT-OV reference setting.)
It is permissible to operate the line input in either the same mode or a different mode than the bus input.
This flexibility allows the BE1-25 to be used, for example, to close a generator breaker onto a dead bus, or
to prevent closure if the generator and/or bus voltage is too high.
See Table 2-1, callout R, for a complete description and precautions on setting the Mode Switches. The
location of the switches is shown in Figure 2-2. Also see
Condition and Mode Switches in Section 5.
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BE1-25 General Information 1-3
LL ADJ
=100V
DL / OV ADJ
=40V
LINE
DEAD
LINE VOLTAGE
LIVE
135V (MAX)
100V
50V
10V (MIN)
2
LIVE LINE/
LIVE BUS
CONDITION
4OV 135V (MAX)
100V
50V
10V (MIN)
P1004-36.vsd
01-29-01
BUS
1
DEAD LINE/
LIVE BUS
CONDITION
LIVE
DL / OV ADJ
=120V
LB ADJ
=35V
BUS VOLTAGE
60V FIXED MINIMUM VOLTAGE
LIMIT (LIVE LINE/LIVE BUS
CONDITION SYNC-CHECK
3
NOTES:
SYNC RELAY CONTACTS
CLOSED BY VOLTAGE MONITOR
SYNC-CHECK LOGIC ENABLED
2
1
LOGIC
4 OV EXCEEDED, SYNC-CHECK
TO ON PERMITS
LOGIC NOT ENABLED (SETTING
MODE SWITCH NO. 1 TO ON
AND CONDITION SWITCH NO. 1
FUNCTION ONLY)
OV)
3
3
Figure 1-1. Voltage Monitor Acceptance Zones
Condition Switches
Five Condition Switches are located on the Voltage Monitor Card, each with two positions to select ON
(Down) and OFF (Up). When ON, Condition Switch No. 1 programs the relay to require recognition that
the line and bus are not in an overvoltage condition (NOT OV) before the SYNC output is allowed.
Condition Switches No. 2 through No. 5 modify the voltage monitor response according to a programmed
set of external conditions. The possible external conditions for each of these four switches are:
Switch 2. Live Line/Live Bus (LL-LB)
Switch 3. Dead Line/Live Bus (DL-LB)
Switch 4. Live Line/Dead Bus (LL-DB)
Switch 5. Dead Line/Dead Bus (DL-DB)
When a selected condition has been recognized, the voltage monitor circuit may be instructed to
immediately energize the Sync-Check output relay, or (if provided) the Voltage Monitor output relay. (See
Figure 1-1, Note 1.)
See Table 2-1, callout S, for a complete description and precautions on setting the Conditions Switches.
The location of the switches is shown in Figure 2-2.
Voltage Difference
A voltage monitor is available that checks the phasor or average voltage difference between the two
inputs. This can be used to prevent the closure of a generator breaker if the voltage difference is too great
(even if the phase angle and voltage level monitoring circuits indicate that proper closing conditions are
otherwise present).
The voltage difference option (included with option 2-A, 2-B, 2-C, 2-R, 2-T or 2-U) is typically used to
reduce the amount of possible system shock or transients when closing a breaker. This option compares
the voltage between line and bus against a selected limit, and initiates either an enable or an inhibit signal
for the sync-check logic, thereby narrowing the voltage across the breaker contacts (as compared to a
simple sync-check acting alone). Figure 1-2 shows closing zones obtained by combining phasor voltage
difference, phase angle limit, and line and bus live/dead voltage limits. Figure 1-3 shows closing zones
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1-4 BE1-25 General Information
obtained by combining average voltage difference, phase angle limit, and line and bus live/dead voltage
limits. If a separate Voltage Monitor relay is supplied (Output option G or H), the NO contact must be in
series with the SYNC relay contact to perform the LL/LB and line not-overvoltage/bus not-overvoltage
enabling functions in Figure 1-2.
Option 2-R, 2-T, or 2-U (Phasor Voltage Difference)
Figure 1-4 may be used as an aid in formulating the voltage difference control settings. Note that the
center reference phasor (VB) represents the monitored bus voltage, while the adjacent phasor (VL)
represents the monitored line voltage. The voltage difference control (∆V) forms an area of acceptance
limit when rotated through 360 degrees. This allows either the voltage difference or the phase angle to be
selected, and the remaining value to be calculated.
Calculate the voltage difference (∆V) using the law of cosines. The equation is:
∆VVV VV
LB LB
=+−⋅⋅⋅
( cos )
22
21
2
θ
(1)
When VLis tangent to the voltage difference circle, the ∆V phasor is perpendicular to VLat the phase
angle limit. Accordingly, the voltage difference or the phase angle can be calculated by equations 2 and 3,
respectively.
∆V V sin
B
=θ (2)
θ∆ =−
sin V
V
1
B(3)
where:
∆V = Voltage Difference
VL= Line Voltage
VB= Bus Voltage
θ= Phase Angle
Note that the point where VLis tangent to the voltage difference circle represents the most extreme
condition of θfor a closure. Assuming that a constant voltage difference exists, the following condition is
valid: If the magnitude of the line voltage decreases, the phase angle must also decrease to allow sync-
acceptance. Therefore, the minimum line voltage possible for sync-acceptance occurs at zero phase
angle.
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BE1-25 General Information 1-5
θ
V ADJ
∆
ALLOWABLE
CLOSING ZONE
PHASE ANGLE ADJ
135V (MAX)
DL /OV ADJ (LINE)
DB /OV ADJ (BUS)
LL ADJ (LINE)
LB ADJ (BUS)
60V (APPROX.) FIXED
MINIMUM VOLTAGE
P1004-35.vsd
01-29-01
θ
Figure 1-2. Closing Zone (Phasor Sensing)
PHASE ANGLE ADJ
135V (MAX)
DL/OV ADJ (LINE)
DB/OV ADJ (BUS)
LL ADJ (LINE)
LB ADJ (BUS)
60V (APPROX.) FIXED
MINIMUM VOLTAGE
00
V ADJ
ALLOWABLE
CLOSING ZONE
P1004-38.vsd
01-29-01
Figure 1-3. Closing Zone (Average Sensing)
Option 2-A, 2-B, or 2-C (Average Voltage Difference)
This option is similar to option 2-T, 2-R, or 2-U except for the sensing method. This option provides
average voltage sensing instead of phasor voltage sensing. This provides a constant ∆V setting
independent of the phase relationship between the line and bus voltages.
Figure 1-5 may be used as an aid in formulating the voltage difference control settings. Note that the
center reference phasor (VB) represents the monitored bus voltage, while the adjacent phasor (VL)
represents the monitored line voltage. The voltage difference control (∆V) forms an area of acceptance
limit.
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1-6 BE1-25 General Information
VLVB
P1000-37.vsd
01-29-01
θ
Figure 1-4. Closing Zone Calculation Diagram (Phasor Sensing)
V
P1004-39.vsd
01-29-01
VB
L
V
Figure 1-5. Closing Zone Diagram (Average Sensing)
Output Relay
The Voltage Monitor output relay option G or H provides additional supervision of the breaker closing
circuit, or provides an indication of the existing voltage conditions for the supervisory control system.
When a Voltage Monitor output relay is installed, the SYNC relay is no longer directly operable by voltage
monitor logic. However, the live line/live bus condition may be utilized to enable the Sync-Check function.
Detailed instructions and precautions for setting the Mode switches and Condition switches are provided
in Table 2-1, callouts R and S. The location of the switches is shown in Figure 2-2.
Voltage sensing connections are shown in Figure 4-8.
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BE1-25 General Information 1-7
OTHER OPTIONS
Expandable Window
An expandable window (option 9 in the second position of the Style Number) is available to enable a local
operator (through a switch) or a remote dispatcher (through the supervisory control system) to expand the
preset phase angle window by a programmed ratio.
Under normal conditions, the phase angle setting is determined by the maximum angular difference that
has been calculated as suitable to meet the expected load flow of the total system. But under emergency
conditions, the load flow throughout the system may result in excessive phase angle separation across the
opened breaker.
In order to reestablish load on a previously faulted line quickly, it may be necessary to expand the
allowable phase window. With this option, closing a contact input to the relay expands the preset phase
setting by a programmed multiple of 2 or 3 (according to the position of a jumper on the circuit card).
This option is not suggested for use in generator applications for the following reason: The phase angle
setting for a generator breaker is determined by the maximum phase difference that can be tolerated by
the generator when connected to the system. An excessive angle can result in excessive mechanical
forces in the generator and associated mountings.
Internal connections for the expandable window are shown in Figure 4-7; control circuit connections are in
Figures 4-10 and 4-11.
External Condition Switches
If a line and bus Voltage Monitor output is incorporated in the relay, the internal Condition Switches may
be functionally operated by remotely located external contacts. This capability is provided by Voltage
Monitor option 2-C, 2-U, or 2-V, but requires a voltage dropping Resistor Module to be mounted on the
relay back panel (see Figure 4-9).
Push-to-Energize Output Pushbuttons
Two PUSH-TO-ENERGIZE OUTPUT switches are available to provide a means of verifying external
output wiring without the inconvenience of having to test the entire relay. These optional switches are
provided for each isolated output function (Sync-Check, Auxiliary Sync-Check and Voltage Monitor), and
may be actuated by inserting a thin, non-conducting rod through access holes in the front panel. See
Figure 2-1 for location.
MODEL AND STYLE NUMBER
The electrical characteristics and operational features of the BE1-25 Sync-Check Relays are defined by a
combination of letters and numbers that make up its Style Number. The model number, together with the
Style Number, describe the options included in a specific device, and appear on the front panel, drawout
cradle, and inside the case assembly.
Upon receipt of a relay, be sure to check the Style Number against the requisition and the packing list to
ensure that they agree.
Style Number Example
The Style Number identification chart (Figure 1-6) defines the electrical characteristics and operational
features included in BE1-25 relays. For example, if the Style Number were M9H A6P N4R0F, the device
would have the following:
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1-8 BE1-25 General Information
BE1-25 Model Number (designates the relay as a Basler Electric, Class 100, Sync-Check Relay)
MSingle-phase sensing
9Expandable phase angle window
HVoltage Monitor relay and Push-to-Energize outputs
A6 0.1 to 99 seconds timing range
POperating power derived from 125 Vdc or 100/120 Vac
NNo target
4Non-isolated contact sensing input
RLine and Bus Voltage Monitor; also a Voltage Difference Monitor with Condition Switches
internal to the relay.
0No auxiliary output
FSemi-flush mounting
OPTION 3
OPTION 4
OPTION 2
OPTION 1
SUPPLY
RANGE
SENSING INPUT
M
POWER
BE1-25
MODEL NO.
SENSING INPUT
TYPE
M
)
Sin
g
le Phase
Volta
g
e
OUTPUT
TIMING
TARGET
N
)
None
A
)
One Internall
y
Operated
B
)
One Current
Operated
F
)
Semi-Flush
Mountin
g
P
)
Pro
j
ection
Mountin
g
1
)
120 Vac, 1-99°
Phase An
g
le
Settin
g
9
)
120 Vac, 1-99°
Phase An
g
le
Settin
g
With
Expandable
Window
1
E
)
S
y
nc-Check
NO Rela
y
F
)
S
y
nc-Check
NO Rela
y
with
Push-to-
Ener
g
ize
Output
G
)
S
y
nc-Check
NO Rela
y
and
Volta
g
e Monitor
SPDT Rela
y
H
)
S
y
nc-Check
NO Rela
y
and
Volta
g
e Monitor
SPDT Rela
y
with Push-to-
Ener
g
ize
Output
(
for
both rela
y
s
)
4
4
A6
)
0.1-99 Sec.
A7
)
1-99 C
y
cles
O
)
48 Vdc
P
)
125 Vdc or
100/120
Vac
R
)
24 Vdc
T
)
250 Vdc or
240 Vac
3
4
)
Non-Isolated
Contact
Sensin
g
Input
5
)
Isolated
Contact
Sensin
g
Input
N
)
None
R
)
Line and Bus
Volta
g
e Monitor
and Volta
g
e
Difference with
PC Bd Mounted
Switches
S
)
Line and Bus
Volta
g
e Monitor
with PC Bd
Mounted Switches
T
)
Volta
g
e Difference
Volta
g
e Monitor
and Volta
g
e
Difference with
External Contact
Inputs
V
)
Line and Bus
Volta
g
e Monitor
with External
Contact Inputs
0
)
None
1
)
S
y
nc-Check
Auxiliar
y
Output
NO Rela
y
2
)
S
y
nc-Check
Auxiliar
y
Output
NC Rela
y
3
)
S
y
nc-Check
Auxiliar
y
Output
SPDT Rela
y
6
)
Power Suppl
y
Status Output
1
CONTACT SENSING MODULES
(Required when Type T Power Supply is specified)
Module Orderin
g
Number
9 1702 06 106
Non-Isolated
Contact Sensin
g
Isolated
Contact Sensin
g
Number of
Contacts
Sensed
Relay Options
Volta
g
e Monitor
with External
Contact Inputs
plus Expandable
Phase Window
Volta
g
e Monitor
with External
Contact Inputs
Expandable Phase
Window
None of the above
9 1702 06 100
9 1702 06 101 9 1702 06 107
9 1702 06 104 9 1702 06 110
9 1702 06 105 9 1702 06 111
6
5
2
1
NOTES:
When Sensin
g
Input Ran
g
e 9 is Selected from the
St
y
le Chart, Option 3 must be 0.
All rela
y
s are supplied in an S1 size case.
Re
q
uires Contact Sensin
g
Module. See Table in this chart.
Not available if Option 2 is B, N, or T.
1
3
4
2.
D434-006.vsd
01-30-01
A
)
Avera
g
e
Volta
g
e Monitor
and Volta
g
e
Difference with
PC Bd Mounted
Switches
U
)
Line and Bus
C
)
Avera
g
e
B
)
Avera
g
e Volta
g
e
Difference
Volta
g
e Monitor
and Volta
g
e
Difference with
External Contact
Inputs
For more information on contact sensin
g
see
Specifications
.
5
5
Figure 1-6. Style Number Identification Chart
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BE1-25 General Information 1-9
SPECIFICATIONS
Voltage and Phase Sensing Nominally rated at 60 hertz with a range of 45 to 65 hertz at a
maximum burden of 1 VA per phase to 125% of nominal voltage.
Maximum continuous voltage rating is 160% of nominal.
Contact Sensing
Contact Sensing Burden
User-supplied contacts with a minimum rating of 0.05 ampere at
250 Vdc are required at all contact sensing inputs. (Specifically the
52b input, the optional expandable phase angle window, and the
optional external voltage condition switches.)
Sensing circuit current is supplied by the relay when isolated
sensing is selected. Non-isolated sensing requires an externally
applied dc sensing voltage equal to the nominal voltage of the relay
power supply input.
For Power Supply Option O ....... 2.4 VA
For Power Supply Option P........6.25 VA
For Power Supply Option R........1.2 VA
For Power Supply Option T ........12.5 VA
Burden Operating Power Burden
Without Voltage Monitor 50 Hz 100 Vac 12 VA
60 Hz 120 Vac 18 VA
125 Vdc 9 W
48 Vdc 9 W
24 Vdc 9 W
250 Vdc 12 W
60 Hz 230 Vac 28 VA
With Voltage Monitor 50 Hz 100 Vac 20 VA
60 Hz 120 Vac 26 VA
125 Vdc 15 W
48 Vdc 15 W
24 Vdc 15 W
250 Vdc 21 W
60 Hz 230 Vac 41 VA
Power Supply One of the four types of power supplies listed in Table 1-1 may be
selected to provide internal relay operating power.
Table 1-1. Power Supply
Type Nominal Input
Voltage
Input Voltage
Range
Burden at Nominal
O (Mid Range) 48 Vdc 24 to 150 Vdc 4.0 W
P (Mid Range) 125 Vdc
120 Vac
24 to 150 Vdc
90 to 132 Vac
4.0 W
10.0 VA
R (Low Range) 24 Vdc 12†to 32 Vdc 4.0 W
T (High Range) 250 Vdc
240 Vac
62 to 280 Vdc
90 to 270 Vac
5.0 W
12.0 VA
†Type R power supply initially requires 14 Vdc to begin operating. Once operating, the voltage may
be reduced to 12 Vdc and operation will continue.
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1-10 BE1-25 General Information
Output Contacts Output contacts are rated as follows:
Resistive
120/240 Vac Make 30 A for 0.2 seconds, carry 7 A continuously, and break 7 A.
125/250 Vdc Make and carry 30 A for 0.2 seconds, carry 7 A continuously, break
0.3 A.
Inductive
120/240 Vac, 125/250
Vdc
Break 0.3 A, (L/R = 0.04).
Target Indicator Target indicators may be either internally operated or current
operated (operated by a minimum of 0.2 A through the output trip
circuit). When the target is current operated, the sync output circuit
must be limited to 30 A for 1 second, 7 A for 2 minutes, and 3 A
continuously.
Phase Angle
Selection Accuracy ± 0.5°or ± 5.0% of the front panel setting for degrees, whichever is
greater, for a nominal input frequency of 50/60 hertz, a sensing
input range of 80 to 135 volts, and at 25°C.
Setpoint Accuracy ±0.5°or ±5%, whichever is greater, from a reference measurement
at 25°C, at nominal input frequency and levels, over the specified
operating range of temperature and input voltages.
Timing Accuracy at 25°CMaximum of 25 milliseconds or 5% of the front panel setting for
time whichever is greater, for a nominal input frequency of 50/60
hertz at 25°C.
TIME Delay Accuracy
(Overall)
±10 milliseconds or ±2%, whichever is greater, of the time delay at
25°C, over the full temperature, voltage and frequency ranges.
Minimum Voltage
Requirement
Minimum voltage detection circuitry enables the sync-check
circuitry when both line and bus are within operating range of the
relay. Voltage sensing circuits are guaranteed to operate at a
minimum voltage of 60 volts. They are guaranteed not to operate
at voltages less than 20 volts. Some units may operate at voltages
in between these two levels because of the individual
characteristics of specific components. Minimum voltage detection
is usually in the range of 45 to 55 volts.
Voltage Difference Option
Range Continuously adjustable over the range of 1 to 135 Vac.
Accuracy Voltage difference setpoint does not vary more than 0.5 V or 5%,
whichever is greater, from a reference measurement at 25°C, with
nominal input frequency, and variation of temperature or voltage
inputs over their specified operating range. This setpoint does not
vary more than 3% from a reading at 25°C over the limited range of
+15 to +40°C.
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BE1-25 General Information 1-11
Line and Bus Voltage
Monitor Option
Range Continuously adjustable over the range of 10 to 135 Vac.
Accuracy The line and bus voltage setpoints do not vary more than 3% from
a reference measurement at 25°C, with nominal input frequency,
and with temperature and voltage inputs within specified operating
range. Setpoints do not vary more than 1% from a reading at 25°C
over the limited temperature range of +15 to +40°C.
Isolation In accordance with IEC 255-5 and IEEE C37.90, one minute dielectric
(high potential) tests as follows:
All circuits to ground: 2121 Vdc
Input to output circuits: 1500 Vac or 2121 Vdc
Surge Withstand Capability
Oscillatory
Fast Transient
Qualified to IEEE C37.90.1-1989
Standard Surge Withstand Capability
(SWC) Tests for Protective Relays and Relay Systems.
Qualified to IEEE C37.90.1-1989 Standard Surge Withstand Capability
(SWC) Tests for Protective Relays and Relay Systems.
Radio Frequency
Interference (RFI)
Maintains proper operation when tested in accordance with IEEE
C37.90-1989,
Trial-Use Standard Withstand Capability of Relay
Systems to Radiated Electromagnetic Interference from
Transceivers.
UL Recognition UL recognized per Standard 508, UL File No. E97033. Note:
Output contacts are not UL recognized for voltages greater than
250 V.
Shock In standard tests, the relay has withstood 15g in each of three
perpendicular planes without structural damage or degradation of
performance.
Vibration In standard tests, the relay has withstood 2g in each of three
mutually perpendicular axes swept over the range of 10 to 500
hertz for a total of six sweeps, 15 minutes each sweep, without
structural damage or degradation of performance.
Operating Temperature -40°C (-40°F) to 70°C (158°F).
Storage Temperature -65°C (-85°F) to 100°C (212°F).
Weight 13.7 pounds maximum.
Case Size S1
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BE1-25 Human-Machine Interface 2-1
SECTION 2 •HUMAN-MACHINE INTERFACE
CONTROLS AND INDICATORS
Table 2-1 lists and briefly describes the operator controls and indicators of the BE1-25 Sync-Check Relay.
Reference the callouts A through P to Figure 2-1 and Q through S to Figure 2-2.
Table 2-1. Location of Controls and Indicators
Callout Control or Indicator Function
A SYNC Indicator Red LED lights when an in-sync condition has been of
sufficient duration to match the TIME DELAY setting.
Lighting of the LED coincides with closure of the Sync
Output contacts. The LED extinguishes when 52b
opens or the in-sync condition ceases.
B TIME DELAY Selector Thumbwheel switches establish the time delay between
sensing the desired in-sync condition and closing the
Sync Output contact. Time delay is in units of seconds
or of cycles, according to the option selected.
Option A6: Adjustable in 1-second increments over a
range of 01 to 99 seconds when multiplier switch
(callout D) is in the X 1.0 position. Alternatively, the
range is 0.1 to 9.9 seconds with the multiplier switch in
the X 0.1 position.
Option A7: Adjustable in 1-cycle increments from 1 to
99 cycles. The multiplier switch (callout D) is omitted.
NOTE
A setting of 00 will inhibit closing of the
SYNC output.
C POWER Indicator LED lights to indicate that the relay power supply is
functioning properly.
D TIME DELAY Multiplier
Switch
Explained above; see callout B.
E∆V Indicator Red LED lights when the difference between the bus
and line voltage is less than the ∆V setting.
∆V Adjustment Continuously adjustable from 1 to 135 Vac. Adjustment
is by small screwdriver through an access hole in the
front panel. CW rotation increases the voltage
difference setting.
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2-2 BE1-25 Human-Machine Interface
Callout Control or Indicator Function
F LL Indicator Red LED lights when the line voltage exceeds the
reference voltage established by the LL setting.
LL Adjustment Continuously adjustable from 10 to 135 Vac.
Adjustment is by small screwdriver through an access
hole in the front panel. CW rotation increases the
voltage setting.
G DL/NOT OV Indicator When in the NORMAL Mode:
Red LED lights when the line voltage is less than the
reference voltage established by the DL/NOT OV
setting that defines a dead line.
When in the NOT OV Mode:
Red LED lights when the line voltage does not exceed
the reference voltage established by the DL/NOT OV
setting that defines an overvoltage condition.
DL/NOT OV Adjustment Continuously adjustable over the range of 10 to 135
Vac. Adjustment is by small screwdriver through an
access hole in the front panel. CW rotation increases
voltage setting.
H Target Reset Lever Allows manual reset of the target.
I and J PUSH-TO-ENERGIZE
OUTPUT Switches
Momentary pushbuttons are accessible by inserting a
1/8 inch diameter non-conducting rod through access
holes in the front panel. Switch I, when actuated,
closes the Sync Output contacts and (if specified) the
Auxiliary Sync Output contacts; Switch J closes the
(optional) Voltage Monitor Output contacts.
K Target Indicator
(Optional)
Magnetically latching indicator which indicates that the
Sync Output relay is or was energized.
L LB Indicator Red LED lights when bus voltage exceeds the
reference voltage established by the LB setting that
defines a live bus condition.
LB Adjustment Continuously adjustable over a range of 10 to 135 Vac.
Adjustment is by small screwdriver through an access
hole in the front panel. CW rotation increases voltage
setting.
M V Indicator Red LED lights whenever the (optional) Voltage Monitor
Output relay is energized.
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BE1-25 Human-Machine Interface 2-3
Callout Control or Indicator Function
N DB/NOT OV Indicator When in the NORMAL Mode:
Red LED lights when the bus voltage is less than the
reference voltage established by the DB/NOT OV
setting that defines a dead bus condition.
When in the NOT OV Mode:
Red LED lights when the bus voltage does not exceed
the reference voltage established by the DB/NOT OV
setting that defines an overvoltage condition.
DB/NOT OV Adjustment Continuously adjustable over the range of 10 to 135
Vac. Adjustment is by small screwdriver through an
access hole in the front panel. CW rotation increases
the voltage setting.
O PHASE ANGLE Selector NOTE
A PHASE ANGLE setting of 00 inhibits
operation of the relay.
Thumbwheel switches set the acceptable maximum
phase difference between the line and bus voltages.
This phase difference window is adjustable in 1°
increments over a range of 01°to 99°.
P PHASE ANGLE Indicator Red LED lights when the phase angle is within the
limits established by the adjacent PHASE ANGLE
Selector.
Q Switchable jumper for
EXPAND option
Position of jumper in Figure 2-2 controls the width of the
expanded phase angle window as a multiple of the
PHASE ANGLE setting. The two positions are X2 and
X3.
R MODE Switch No. 1 (Bus)
MODE Switch No. 2 (Line)
For Both Mode Switches:
Up = NORMAL Mode;
Down = NOT OV Mode.
When in the NORMAL Mode:
(1) A high voltage threshold is established by front
panel controls, above which the bus (or line, as the
case may be) is considered live;
(2) A low voltage threshold is established by front panel
controls, below which the bus (or line) is considered
dead.
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2-4 BE1-25 Human-Machine Interface
Callout Control or Indicator Function
R
(
Cont'd
)
When in the NOT OV Mode:
(1) A voltage above the high voltage setpoint setting is
considered overvoltage.
(2) A voltage below the low voltage setpoint setting is
defined as dead.
(3) A voltage between the two setpoints is defined as
live. This condition is indicated by the illumination of
two LEDs: either LL or LB and the corresponding NOT
OV.
S CONDITION Switches
No. 1 (Not-Overvoltage
Enable to the sync logic
circuitry)
Up = OFF: Disables the NOT OV Mode of operation
during a live line/live bus condition.
Down = ON: Allows the NOT OV Mode of operation to
add a further constraint to the live line/live bus condition
(assuming that the NOT OV Mode has been previously
selected on Mode Switch No. 1 or No. 2). The
additional constraint is that the line and/or bus must not
be in the overvoltage region. (This switch does not
affect the Voltage Monitor Output relay.)
No. 2 (Live Line/Live Bus) Up = OFF
Down = ON
When ON (Down), the Voltage Monitor Output relay is
actuated when a live line/live bus condition is
recognized.
WARNING!
If relay has Output Option E or F:
Condition Switch No. 2 (LL-LB) must be Up
(OFF) when output option E or F is selected.
Otherwise, sync outputs will occur under
live line/live bus conditions without benefit of
the Sync-Check function. No switch or
contact should be connected to the LL-LB
input terminal in this case.
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