Basler BE1-59N User manual

INSTRUCTION MANUAL
FOR
GROUND FAULT OVERVOLTAGE RELAY
BE1-59N
Publication: 9 1714 00 990
Revision: E 12/2001

BE1-59N 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
The purpose of this Instruction Manual is to furnish information concerning the operation and installation of
this device. To accomplish this, the following is provided.
• Specifications
• Functional characteristics
• Operational Tests
• Mounting Information

ii BE1-59N Introduction
CONFIDENTIAL INFORMATION
OF BASLER ELECTRIC COMPANY, HIGHLAND, IL. IT IS LOANEDFOR CONFIDENTIALUSE, 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: November 1986
Printed in USA
© 1986, 2001 Basler Electric Co., Highland, IL 62249
December 2001
Itisnottheintentionofthismanualtocoverall detailsandvariationsinequipment,nordoes
thismanualprovidedatafor every possiblecontingencyregardinginstallationoroperation.
The availability and design of all features and options are subject to modification without
notice. Shouldfurtherinformationberequired,contactBaslerElectricCompany,Highland,
Illinois.
BASLER ELECTRIC
ROUTE 143, BOX 269
HIGHLAND, IL 62249 USA
http://www.basler.com, [email protected]
PHONE [phone] FAX [phone]

BE1-59N Introduction iii
CONTENTS
SECTION 1 • GENERAL INFORMATION ............................................... 1-1
DESCRIPTION ................................................................. 1-1
HIGHRESISTANCEGROUNDING................................................. 1-1
UNGROUNDED SYSTEMS ....................................................... 1-1
MODEL AND STYLE NUMBER .................................................... 1-2
Sample Style Number ........................................................ 1-2
SPECIFICATIONS .............................................................. 1-4
SECTION 2 • CONTROLS AND INDICATORS ........................................... 2-1
GENERAL .................................................................... 2-1
SECTION 3 • FUNCTIONAL DESCRIPTION ............................................. 3-1
GENERAL .................................................................... 3-1
INPUTS ....................................................................... 3-1
FILTERS ...................................................................... 3-1
OVERVOLTAGE COMPARATOR .................................................. 3-1
DEFINITE TIME DELAY (OPTIONAL) ............................................... 3-2
INVERSE TIME DELAY (OPTIONAL) ............................................... 3-2
REFERENCE VOLTAGE CIRCUIT ................................................. 3-2
UNDERVOLTAGE ELEMENT (OPTIONAL) .......................................... 3-2
Undervoltage Operation ....................................................... 3-2
Undervoltage Inhibit .......................................................... 3-2
POWER SUPPLY ............................................................... 3-3
POWER SUPPLY STATUS OUTPUT ............................................... 3-3
TARGET INDICATOR CIRCUITS .................................................. 3-3
Internally Operated Targets .................................................... 3-3
Current Operated ............................................................ 3-3
SECTION 4 • INSTALLATION ........................................................ 4-1
GENERAL .................................................................... 4-1
RELAY OPERATING PRECAUTIONS .............................................. 4-1
DIELECTRIC TEST ............................................................. 4-1
MOUNTING ................................................................... 4-1
CONNECTIONS ................................................................ 4-1
OPERATIONAL TEST ........................................................... 4-5
SECTION 5 • MAINTENANCE ........................................................ 5-1
GENERAL .................................................................... 5-1
IN-HOUSE REPAIR ............................................................. 5-1
STORAGE .................................................................... 5-1
TESTPLUG ................................................................... 5-1
SECTION 6 • MANUAL CHANGE INFORMATION ........................................ 6-1
MANUAL CHANGE INFORMATION ................................................ 6-1

BE1-59N General Information 1-1
SECTION 1 • GENERAL INFORMATION
DESCRIPTION
The available fault current for single-phase-to-ground faults is very limited for ungrounded systems and
systems which are grounded through a high resistance. This current limiting reduces the possibility of
extensive equipment damage, and eliminates the need for a neutral breaker by reducing the fault current
below the level required to sustain an arc. But, it remains important to detect and isolate single-phase-to-
ground faults in order to prevent their evolution into more dangerous faults such as phase-to-phase-to-
ground and three-phase-to-ground faults. Sensitive voltage relays can be used to detect ground faults
where the fault currentis very small. The BE1-59N Ground Fault Overvoltage Relay is especially suited to
this task.
HIGH RESISTANCE GROUNDING
Acommonmethodofgroundingan acgeneratoristoconnectadistributiontransformerbetweentheneutral
of thegenerator and the station ground. The distribution transformer's primary voltage rating is equal to, or
greater than, the generator's rated line-to-neutral voltage. The distribution transformer secondary is rated
at 200/240 Vac or 100/120 Vac, and a resistor is connected across the secondary winding. When reflected
through the transformer, the resistor is effectively a high resistance.
Rp= Rsx N2
where Rpis the effective primary resistance
Rsis the actual value of the secondary resistor
N is the turns ratio of the distribution transformer
Available single-phase-to-ground fault current at the generator terminals is greatly reduced by the high
effective resistance of the distribution transformer and secondary resistor. The distribution transformer
provides isolation for the protection scheme and reduces the voltage to a convenient level.
The BE1-59N Ground Fault Overvoltage Relay is connected across the secondary resistor to detect the
increase in voltage across the distribution transformer caused by a ground fault in the generator stator
windings. A ground fault at the generator terminals will result in rated line-to-neutral voltage across the
transformerprimary,while ground faultsnear the neutralwillresultin lower voltages. Theovervoltagerelay
setpoint must be higher than any neutral voltage caused by normal unbalances in order to avoid nuisance
trips. This will allow a certain percentage of the stator windings to go unprotected by the overvoltage relay.
The overvoltage relay function typically protects 90 to 95% of the generator stator windings.
The BE1-59N Ground Fault Overvoltage Relay monitors the fundamental frequency (50 or 60 Hz) voltage
which accompanies a ground fault, but is insensitive to the third harmonic voltage present during normal
operation. One hundred percent protection of the generator stator windings is obtainable with the optional
overlapping undervoltageelement. The under voltage element is tunedto thethird harmonic voltage which
ispresentinthegeneratorneutralundernormalconditions. Theundervoltageelementdetectsthereduction
of the normal third harmonic voltage which accompanies a ground fault near the neutral point of the
generator.
An undervoltage inhibit feature is included with the third harmonic undervoltage element. This feature
supervises the operation of the ground fault relay to prevent operation during startup and shutdown by
monitoring the generator terminal voltage.
UNGROUNDED SYSTEMS
The BE1-59N Ground FaultOvervoltage Relay is used to detect ground faults onungrounded three-phase-
three-wire systems. The relay is connected as shown inFigure1-1. Asetof voltagetransformersare wired
with a grounded wye primary and a broken delta secondary. The BEl-59N is connected across the broken
delta. It is often necessary to connect a resistor across the broken delta to avoid ferroresonance.
Groundedwye/brokendeltavoltagetransformersactasazerosequencefiltersbysummingthethreephase
voltages. Undernormalconditionsthissumiszero. Whenagroundfaultoccurs,theBE1-59NGroundFault
Overvoltage Relay will detect the presence of the secondary zero sequence voltage (3VO).

1-2 BE1-59N General Information
The BE1-59N Ground Fault Overvoltage Relay greatly reduces the risk of equipment damage by detecting
and isolating the first ground on an ungrounded system.
Figure 1-1. Ungrounded 3-Phase, 3-Wire System
MODEL AND STYLE NUMBER
Electrical characteristics and operational features included in a specific relayare defined by a combination
of lettersand numbers whichmakes up the device stylenumber. Themodel number, BE1-59N,designates
the device as a Basler Electric Class 100 Ground Fault Overvoltage protective relay. The style number
together withthe model number describe the features and options in a particular device and appear on the
front panel, drawout cradle and inside the case assembly.
Sample Style Number
In Figure 1-2, the style number identification chart illustrates the features of a relay sample style number.
If the style number were A5F F6P D2S3F, the relay would have the following features:
BE1-59N Model Number
ASingle-phase voltage sensing input
5120 Vac, 60 hertz sensing input (nominal) with 1 to 20 Vac pickup range
FTwo normally-open output relays (one overvoltage and one undervoltage)
F6 Inverse time delay for overvoltage and definite time delay for undervoltage
POperating power derived from either 125 Vdc or 100/120 Vac
DTwo current operated targets (one per function)
2Undervoltage element range 0.1 to 2.5 Vac (low range with sensing input 5)
SPush-to-energize outputs
3Two auxiliary output relays, normally-open (one per function)
FSemi-flush mounting

BE1-59N General Information 1-3
Figure 1-2. Style Number Identification Chart

1-4 BE1-59N General Information
SPECIFICATIONS
The BE1-59N Ground Fault Overvoltage Relay has the following features and capabilities.
Voltage Sensing Inputs Maximum continuous rating: 360 Vac for 100/120 Vac input, 480 Vac for
200/240 Vac input, with a maximum burden of 2 VA for each input.
Undervoltage Sensing High range: 0.5 to 12 Vac (sensing input range 1, 2, 5, or 6) or 1.0 to 24
Input Range Vac (Sensing input range 3, 4, 7, or 8)
Low range: 0.1 to 2.5 Vac (sensing input range 1, 2, 5, or 6) or 0.2 to 5.0
Vac (Sensing input range 3, 4, 7, or 8)
Pickup Accuracy 1 to 24 Vac range: + 2% or 20 millivolts
All other ranges: + 2% or 10 millivolts
Overvoltage Sensing Ranges selctable by unit type for 50 or 60 Hz operation: 1 to 20 Vac, 10 to
Input Range 50 Vac, 2 to 40 Vac, 20 to 100 Vac
Pickup Accuracy 120 Vac (sensing input range 1, 2, 5, or 6) ±2.0% or 100 millivolts,
whichever is greater.
240 Vac (sensing input range 3, 4, 7, or 8) ±2.0% or 200 millivolts,
whichever is greater.
Dropout 98% of pickup within 7 cycles.
Timing Characteristics
Instantaneous (no Less than 70 milliseconds for a voltage level that exceeds the pickup
intentional delay) setting by 5% or 1 volt (whichever is greater).
Definite Adjustable from 00.1 to 99.9 seconds, in steps of 0.1 seconds. Accuracy
iswithin2.0%or100 milliseconds, whicheverisgreater. (Asettingof00.0
provides instantaneous timing.)
Inverse Responsetimedecreasesasthedifferencebetweenthemonitoredvoltage
and the setpoint increases. The inverse time characteristics switch is
adjustable from 01 to 99 in 01 increments. Each position corresponds to
a specific curve except 00, which is instantaneous.
Accuracy is within ±5% or 25.0 milliseconds (whichever is greater) of the
indicated time for any combination of the time dial and within ±2% of the
voltage magnitude or 100 millivolts (for the 120 Vac sensing range) or 200
millivolts (for the 240 Vac sensing range) (whichever is greater) from the
actual pickup value. Inverse time is repeatable within ±2% or 25.0
milliseconds (whichever is greater) for any time dial or pickup setting. The
characteristic curves are defined in Figures 1-3 and 1-4.
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.
250 Vdc Make and carry 30 A for 0.2 seconds, carry 7 A
continuously, and break 0.1 A.
500 Vdc Make and carry 15 A for 0.2 seconds, carry 7 A
continuously, and break 0.1 A.

BE1-59N General Information 1-5
Output Contacts - Continued
Inductive:
120/240 Vac, Make and carry 30 A for 0.2 seconds, carry 7 A
125/250 Vdc continuously, and break 0.1 A. (L/R = 0.04).
Target Indicators Function targets may be specified as either internally operated, or current
operated by a minimum of 0.2 A through the output trip circuit. When cur-
rent operated, the output circuit must be limited to 30 A for 0.2 seconds, 7
A for 2 minutes, and 3 A continuously.
Power Supply Input power may be obtained from a variety of ac or dc external power
sources. Available power supply options are indicated in Table 1-1.
Table 1-1. Power Supply Specifications.
Type Nominal Input
Voltage
Input
Voltage
Range
Burden
at
Nominal
O 48 Vdc 24 to 60 Vdc 7.0 W
P 125 Vdc
120 Vac 62 to 150 Vdc 90 to 132 Vac 7.5 W 15.0 W
†R 24 Vdc 12 to 32 Vdc 7.5 W
‡S 48 Vdc
125 Vdc 24 to 60 Vdc 62 to 150 Vdc 7.0 W 7.5 W
T 250 Vdc
240 Vac 140 to 280 Vdc 190 to 270 Vac 12.0 W 33.5 VA
NOTES:
†Type R Power Supply may require 14 Vdc to begin operation.
Once operating, the voltage may be reduced to 12 Vdc.
‡Type S Power Supply is field selectable for 48 or 125 Vdc.
Selection mustbe implemented attime of installation. This Power
Supply option is factory set for 125 Vdc.
Isolation 1500 Vac at 60 hertz for one minute in accordance with IEC 255-5 and
ANSI/IEEE C37.90-1989 (Dielectric Test).
Radio Frequency Field Tested using a five watt, hand-held transceiver operating at random
Interference (RFI) frequencies centered around 144 MHz and 440 MHz, with the antenna
located six inches from the relay in both horizontal and vertical planes.
SurgeWithstandCapability QualifiedtoANSI/IEEEC37.90.1-1989
StandardSurge Withstand Capabil-
ity (SWC) Tests for Protective Relays and Relay Systems.
Operating Temperature -40
 C (-40  F) to +70  C (+158  F).
Storage Temperature -65
 C (-85  F) to +100  C (+212  F).
Shock In standard tests, the relay has withstood 15 g in each of three mutually
perpendicular planes without structural damage or degradation of perfor-
mance.

1-6 BE1-59N General Information
Vibration: Instandardtests,therelay haswithstood2Gineachofthreemutuallyper-
pendicular planes, swept over the range of 10 to 500 Hz for a total of six
sweeps,15minuteseachsweep,withoutstructuraldamageordegradation
of performance.
Weight 13.6 (6.17 kg) maximum.
Case Size S1 (6.85"W x 9.32"H x 9.405"D).
Figure 1-3. Overvoltage Inverse Time Curves

BE1-59N General Information 1-7
SCALE A 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2
SCALE B 4.8 4.4 4.0 3.6 3.2 2.8 2.4 2.0 1.6 1.2 0.8 0.4
SCALE C 121110987654321
SCALE D 24 22 20 18 16 14 12 10 8 6 4 2
VOLTAGE DIFFERENCE FROM PICKUP
Figure 1-4. Undervoltage Inverse Time Curves
Table 1-2. Undervoltage Inverse Time Curves Scale
Sensing Input
Range Option 1-2 Option 1-1
1, 2, 5, or 6 Scale A Scale C
3, 4, 7, or 8 Scale B Scale D

BE1-59N Controls and Indicators 2-1
SECTION 2 • CONTROLS AND INDICATORS
GENERAL
Table 2-1 lists and describes the controls and indicators of the BE1-59N Ground Fault Overcurrent Relay.
Table 2-1. Controls and Indicators (Refer to Figure 2-1)
Letter Control or Indicator Function or Indicator
AOvervoltage Pickup
Adjustment A multiturn potentiometer that sets the overvoltage comparatorthresholdvoltage. Continuouslyadjustableover
the range indicated by the style chart.
BOvervoltage Pickup LED A red LED that lights when overvoltage exceeds the pickup
setting.
COvervoltage Time Dial Pushbutton switch that selects the desired overvoltage
outputdelay,eitherdefinitetime(from00.1to99.9seconds)
or, inverse time (characteristic curves 01 through 99). A
setting of 00 is instantaneous in either case.
DUndervoltage Time Dial Pushbutton switch that selects the desired undervoltage
outputdelay,eitherdefinitetime(from00.1to99.9seconds)
or, inverse time (characteristic curves 01 through 99). A
setting of 00 is instantaneous in either case.
EPower LED LED illuminates to indicate that the relay power supply is
functioning.
FTargetResetLever Linkageextendingthroughbottomoffrontcoverthat is used
to reset magnetically latching target indicators.
GTarget Indicator(s) Magnetically latching indicators that indicate that the
associated output relay(s) have been energized.
H, I Push to Energize Output
Switches Momentary pushbuttons accessible by inserting a 1/8 inch diameter non-conducting rod through the front panel.
Pushbuttons are used to energize the output relays in order
to test system wiring.
JUndervoltage Pickup LED A red LED that lights when undervoltage exceeds the
pickup setting.
KUndervoltage Pickup
Adjustment A multiturn potentiometer that sets the undervoltage comparatorthresholdvoltage. Continuouslyadjustableover
the range indicated by the style chart.
LInhibit LED A red LED that lights whenthe monitoredgenerator voltage
is under the inhibit set point.
MInhibit Pickup Adjustment Multiturn potentiometer that sets the inhibit comparator
thresholdsothatwhenevergeneratorvoltagefallsbelowthe
set point, the (optional) undervoltage measuring circuitry is
inhibited from operation.

2-2 BE1-59N Controls and Indicators
Figure 2-1. Location of Controls and Indicators.

BE1-59N Controls and Indicators 2-32-3 BE1-59N Controls and Indicators

BE1-59N Functional Description 3-1
SECTION 3 • FUNCTIONAL DESCRIPTION
GENERAL
TheBE1-59NGroundFaultOvervoltageRelayisasolidstatedigitaldevicethatisdesignedtodetectground
faults. The functional block diagram of Figure 3-1 illustrates the overall operation of the relay.
Figure 3-1. Functional Block Diagram
INPUTS
The relay senses the level of voltage developed across a resistor connected in the neutral-grounding
transformer secondary. The relay may also be used with ungrounded systems with voltage transformers
connected in a wye/broken delta configuration. These connections are shown in Section 4.
Internal transformers provide further isolation and step down for the relay logic circuits.
FILTERS
A bandpass filter provides a peak sensitivity at 50 or 60 Hz for the overvoltage input, with third harmonic
rejection of40 dB minimum. If an undervoltage element is specified,an additional filterwith peak sensitivity
at the third harmonic is included. The filter provides 40 dB rejection of the fundamental.
OVERVOLTAGE COMPARATOR
The overvoltage comparator circuit receives a sensing voltage from the bandpass filter and a reference
voltage from the front panel setting. The comparator determines within five cycles if the fundamental
frequency (50 or 60 hertz) is less than or greater than the reference setting. When the input exceeds the
setting,theresultingcomparatoroutputenablesthetimingcircuitifdefiniteorinversetimedelayisspecified,
and the OVERVOLTAGE PICKUP LED illuminates. If instantaneous timing is used,the comparator output
immediately energizes the overvoltage relay and, if present, the overvoltage auxiliary relay.

3-2 BE1-59N Functional Description
DEFINITE TIME DELAY (OPTIONAL)
An output signal from the comparator circuit enables a counting circuit to be incremented by an internal
clock. When the counting circuit reaches a count which matches the number entered on the TIME DIAL,
the output relay and auxiliary relay, if present, are energized. However, if the sensed input voltage falls
below the pickup setting before the timer completes its cycle, the timer resets within 2.0 cycles.
The definite time delay is adjustable from 00.1 to 99.9 seconds in 0.1 second increments. Front panel
mounted switches determine the delay. Position 00.0 is instantaneous.
INVERSE TIME DELAY (OPTIONAL)
The inverse time delay circuit is identical to the definite time delay circuit except that a voltage controlled
oscillator (VCO) is substituted for the clock signal. The VCO, in turn, is controlled by a voltage derived from
the sensed input. Because the frequency of the oscillator is kept proportional to the sensed input voltage,
the desired inverse time delay is produced.
The inverse time characteristic curve switch is adjustable from 01 to 99 in 01 increments. Each position
corresponds to a specific curve setting except 00, which is instantaneous. Refer to Figure 1-2 to see the
inverse time characteristic curve.
REFERENCE VOLTAGE CIRCUIT
A constant voltage source provides a reference voltage to the potentiometers on the front panel. The
potentiometers, in turn, provide reference voltagestoallthecomparator circuitsand establish thethreshold
for each circuit.
UNDERVOLTAGE ELEMENT (OPTIONAL)
Undervoltage Operation
Theundervoltageoptionissensitivetothethirdharmonicvoltage(150Hzor180hertz)atgeneratorneutral,
and provides 40 dB rejection of the fundamental frequency (50 or 60 hertz). The undervoltage measuring
element determines within five cycles ifthe third harmonic voltage is less than or greater than the reference
setting. If the measured third harmonic voltage is less than the reference setting, the undervoltage pickup
LED will illuminate, and the delay timer is triggered. When the timer completes its cycle, a signal is
generated to energize the undervoltage output relay and, if selected, the undervoltage auxiliary relay. But,
ifthevoltagelevelswingsabovethereference settingbeforethedelaytimerhascycled,theoutputcontacts
reset within 7.0 cycles.
Intheeventthatbothtripconditions(undervoltageandovervoltage)arepresent,theundervoltageresponse
is inhibited.
Thethirdharmonic pickupsetting(i.e.,UNDERVOLTAGEPICKUP)isafrontpanelmountedpotentiometer,
continuously adjustable on the high range from 0.5 to 12 Vac(sensing input range 1, 2, 5, or 6) or 1.0 to 24
Vac (Sensing input range 3, 4, 7,or 8). On the low range, it is adjustable from 0.1 to 2.5 Vac (sensing input
range 1, 2, 5, or 6) or 0.2 to 5.0 Vac (Sensing input range 3, 4, 7, or 8). The time delays available are
instantaneous, definite, or inverse time. (Instantaneous is defined as no intentional time delay. The timing
circuits are analogous to those previously described.)
Undervoltage Inhibit
Whentheundervoltage measuringelementisselected,anundervoltageinhibitcircuitis included to monitor
the generator terminal voltage. this circuit inhibits operation ofthe 150/180 hertz measuring elementif the
generator terminal voltage is less than the undervoltage inhibit setting. The panel mounted undervoltage
inhibit potentiometer is continuously adjustable from 40 to 120 Vac for 100/120 Vac sensing input, and 80
to 240 Vac for the 200/240 Vac input.

BE1-59N Functional Description 3-3
POWER SUPPLY
BaslerElectricenhanced the powersupplydesignforunit case relays. Thisnew designcreatedthree,wide
rangepowersuppliesthatreplacethefivepreviouspowersupplies. Stylenumberidentifiersforthesepower
supplies have not been changes so that customers may order the same styled numbers that they ordered
previously. The first newly designed power supplies were installed in unit case relays with EIA date codes
9638 (third week of September 1996). Relays with a serial number that consists of one alpha character
followed by eight numerical characters also have the new wide range power supplies. A benefit of this new
design increases the power supply operating ranges such that the 48/125 volt selector is no longer
necessary. Specific voltage ranges for the three new power supplies and a cross reference to the style
number identifiers are shown in the following table.
Table 3-1. Wide Range Power Supply Voltage Ranges
Power Supply Style Chart Identifiers Nominal Voltage Voltage Range
Low Range R 24 Vdc 12† to 32 Vdc
Mid Range O, P, S 48, 125 Vdc 24 to 150 Vdc
High Range T 125, 250 Vdc 62 to 280 Vdc
† 14 Vdc is required to start the power supply.
Relay operating power is developed by the wide range, isolated, low burden, flyback switching, solid state
power supply. Nominal + 12 Vdc is delivered to the relay internal circuitry. Input (source voltage) for the
power supply is not polarity sensitive. A red LED turns ON to indicate that the power supply is functioning
properly.
POWER SUPPLY STATUS OUTPUT
A normally closed output relay may be provided, whose contact remains open when energized by the
presence of nominal voltage at the output of the power supply. If the power supply voltage fails or falls
below requirements, the power supply status output relay will de-energize, closing its contact.
A shorting bar is included in the relay case so that the status output terminals can provide a remote
indication that theBE1-59N relay has been withdrawn from its case or taken out of service by removing the
connection plug.
If the power supply status output is provided, then auxiliary output contacts are not available.
TARGET INDICATOR CIRCUITS
When specified, a frontpanel target indicator for each type of monitoring (i.e., overvoltage or undervoltage)
will be supplied. Two types of target drive circuits are available:
Internally Operated Targets
The output from an overvoltage or undervoltage circuit is directly applied to drive the appropriate target
indicator. The indicator is tripped regardless of the current level of the trip circuit.
Current Operated
This target will operate only when a minimum of 0.2 A flows in the output circuit. A special reed relay in
series with the output contact provides the signal to the target indicator.
Each target, when operated, is magnetically latched and must be reset manually.

BE1-59N Installation 4-1
NOTE
Besuretherelay caseishard-wiredtoearthgroundwithnosmallerthan12AWGcopper
wire attached to the ground terminal on the rear of the relay case. When the relay is
configured in a system with other protective devices, it is recommended to use a
separate lead to the ground bus from each relay.
SECTION 4 • INSTALLATION
GENERAL
When not shipped as part of a control or switchgear panel, the relays are shipped in sturdy cartons to
prevent damage during transit. Immediately upon receipt of a relay, check the model and style number
againsttherequisitionandpackinglisttoseethattheyagree. Visuallyinspecttherelayfordamagethatmay
haveoccurredduring shipment. Ifthereisevidenceofdamage,immediatelyfile a claim withthecarrier and
notify the Regional Sales Office, or contact the Sales Representative at Basler Electric, Highland, Illinois.
In the event the relay is not to be installed immediately, store the relay in its original shipping carton in a
moisture and dust free environment. When relay is to be placed in service, it is recommended that the
operational test procedure (page 4-4) be performed prior to installation.
RELAY OPERATING PRECAUTIONS
Before installation or operation of the relay, note the following precautions:
1. A minimum of 0.2 A in the output circuit is required to ensure operation of current operated targets.
2. Do not touch target indicator vanes. Always reset targets by use of the target reset lever.
3. The relay is a solid-state device. If a wiring insulation test is required,remove the connecting plugs
and withdraw the cradle from its case.
4. Whentheconnectingplugsareremovedtherelay isdisconnectedfromtheoperatingcircuitandwill
not provide system protection. Always be sure that external operating (monitored) conditions are
stable before removing a relay for inspection, test, or service.
5. Be sure the relay case is hard wired to earth ground using the ground terminal on the rear of the
unit. It is recommended to use a separate ground lead to the ground bus for each relay.
DIELECTRIC TEST
In accordance with IEC 255-5 and ANSI/IEEE C37.90-1978, one-minute dielectric (high potential) tests up
to 1500 Vac (45-65 hertz) may be performed. This device employs decoupling capacitors to ground from
terminals 3 and 4. Accordingly, a leakage current is to be expected at these terminals.
MOUNTING
Because the relay is of solid state design, it does not have to be mounted vertically. Any convenient
mounting angle may be chosen. Relay outline dimensions and panel drilling diagrams are supplied at the
end of this section.
CONNECTIONS
Incorrect wiring may result in damage to the relay. Be sure to check model and style number against the
options listed in the Style Number Identification Chart before connecting and energizing a particular relay.
Connections should be made with minimum wire sizeof 14 AWG. Typical external connections are shown
in Figures 4-1 and 4-2. Internal connections are shown in Figure 4-3.

4-2 BE1-59N Installation
Figure 4-1. Typical Control Circuit Connections

BE1-59N Installation 4-3
Figure 4-2. Typical Voltage Sensing Connections