Basler BE1-50 User manual

INSTRUCTION MANUAL
FOR
INSTANTANEOUS OVERCURRENT RELAY
BE1-50
P0050-25
Publication: 9171000990
Revision: E 09/07
www . ElectricalPartManuals . com

www . ElectricalPartManuals . com

9171000990 Rev E BE1-50 Introduction i
INTRODUCTION
This instruction manual provides information about the operation and installation of the BE1-50
Instantaneous Overcurrent 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.
www . ElectricalPartManuals . com

ii BE1-50 Introduction 9171000990 Rev E
First Printing: November 1986
Printed in USA
© 1986, 1993, 1998, 2001, 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
http://www.basler.com, [email protected]
PHONE [phone] FAX [phone]
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.
www . ElectricalPartManuals . com

9171000990 Rev E BE1-50 Introduction iii
REVISION HISTORY
The following information provides a historical summary of the changes made to the BE1-50 instruction
manual (9171000990). Revisions are listed in reverse chronological order.
Manual
Revision and Date Change
E, 09/07 •Added manual part number and revision to footers.
•Updated Output Contact ratings in Section 1.
•Updated Power Supply Burden data in Section 1.
•Updated front panel illustrations to show laser graphics.
•Updated Target Indicator description in Section 3.
•Added GOST-R to Section 1, General Information.
•Moved content of Section 7, Manual Change Information to Manual
Introduction.
•Moved content of Section 6, Maintenance to Section 4, Installation.
D, 12/01 •Updated cover drawings in Section 4 to reflect new drawings.
C, 11/98 •Deleted all references to Service Manual.
•Updated Style Chart by adding Option 3-6 Power Supply Status
Output, changing Power Supply Type T from “230 Vac” to “240 Vac”,
deleted “Selectable” from Type S, and added Note 6.
•Deleted 500 Vdc from Output Circuits in Specifications.
•Added Note to Table 1-1.
•Added new power supply information and Fast Transient to
Specifications.
•Corrected Figure 2-1 from “Instantaneous Undercurrent Relay” to
Instantaneous Overcurrent Relay”.
•Added new power supply information to Section 3 starting with
“Basler Electric enhanced the power supply design…”
•Divided Section 4, Installation into two sections Section 4, Installation
and Section 5, Testing.
•Added new dimension figures to include all options available (S1
single-ended and double-ended, and both mounting positions) to
Section 4.
•Changed Output Connection diagrams to include Sensing Type E or
G and Output F or H, Sensing Type J and Output J or K, and Sensing
Type F and output E or G.
•Corrected minor errors and changed the format of the manual.
B, 06/93 •Added UL Recognition statement, page 1-5.
•Added new Figures 4-6 through 4-9.
—, 01/86 •Initial release
www . ElectricalPartManuals . com

iv BE1-50 Introduction 9171000990 Rev E
This page intentionally left blank.
www . ElectricalPartManuals . com

9171000990 Rev E BE1-50 Introduction v
CONTENTS
SECTION 1 •GENERAL INFORMATION................................................................................................ 1-1
PURPOSE........................................................................................................................................... 1-1
APPLICATION .................................................................................................................................... 1-1
Ground Fault Detection ................................................................................................................ 1-1
Phase Fault Detection.................................................................................................................. 1-1
Combination with Other Protective Devices................................................................................. 1-2
MODEL AND STYLE NUMBER.......................................................................................................... 1-2
Style Number Example................................................................................................................. 1-3
SPECIFICATIONS.............................................................................................................................. 1-3
Current Sensing............................................................................................................................ 1-4
Pickup Range ............................................................................................................................... 1-4
Pickup Accuracy........................................................................................................................... 1-4
Dropout......................................................................................................................................... 1-4
Timing........................................................................................................................................... 1-4
Output Contacts............................................................................................................................ 1-4
Power Supply................................................................................................................................ 1-5
Target Indicators........................................................................................................................... 1-5
Type Tests.................................................................................................................................... 1-5
Physical ........................................................................................................................................ 1-5
Agency Recognition/Certification ................................................................................................. 1-6
SECTION 2 •CONTROLS AND INDICATORS ....................................................................................... 2-1
INTRODUCTION................................................................................................................................. 2-1
SECTION 3 •FUNCTIONAL DESCRIPTION........................................................................................... 3-1
INTRODUCTION................................................................................................................................. 3-1
STEP-DOWN TRANSFORMER......................................................................................................... 3-1
FULL-WAVE RECTIFIERS................................................................................................................. 3-1
RESPONSE CHARACTERISTICS..................................................................................................... 3-1
PICKUP SETTINGS............................................................................................................................ 3-2
PICKUP COMPARATORS.................................................................................................................. 3-2
PULSE STRETCHERS....................................................................................................................... 3-2
OUTPUTS........................................................................................................................................... 3-2
TIMING................................................................................................................................................ 3-2
OUTPUTS........................................................................................................................................... 3-2
PUSH-TO-ENERGIZE OUTPUT PUSHBUTTONS............................................................................ 3-2
POWER SUPPLY STATUS OUTPUT................................................................................................ 3-2
POWER SUPPLY ............................................................................................................................... 3-2
TARGET INDICATORS ...................................................................................................................... 3-2
Internally Operated Targets.......................................................................................................... 3-2
Current Operated Targets ............................................................................................................ 3-3
SECTION 4 •INSTALLATION.................................................................................................................. 4-1
INTRODUCTION................................................................................................................................. 4-1
RELAY OPERATING GUIDELINES AND PRECAUTIONS ............................................................... 4-1
MOUNTING......................................................................................................................................... 4-1
CONNECTIONS................................................................................................................................ 4-12
MAINTENANCE................................................................................................................................ 4-18
STORAGE......................................................................................................................................... 4-18
SECTION 5 •TESTING ............................................................................................................................ 5-1
INTRODUCTION................................................................................................................................. 5-1
OPERATIONAL TEST ........................................................................................................................ 5-1
www . ElectricalPartManuals . com

vi BE1-50 Introduction 9171000990 Rev E
This page intentionally left blank.
www . ElectricalPartManuals . com

9171000990 Rev E BE1-50 General Information 1-1
SECTION 1 •GENERAL INFORMATION
PURPOSE
Instantaneous overcurrent relays provide phase and ground fault protection for distribution circuits,
generators, motors, transformers, and other major components of power systems. BE1-50 Instantaneous
Overcurrent relays have a wide range of pickup settings and input configurations to accommodate
protection requirements for power systems. BE1-50 relays are available in single or multi-phase for power
units.
APPLICATION
Some applications are illustrated in Figure 1-1.
Figure 1-1. Typical BE1-50 Applications
Ground Fault Detection
BE1-50 relays can be applied to monitor zero sequence currents that are indicative of ground faults. The
most sensitive method of ground fault protection utilizes a single current transformer through which all the
conductors are passed (Figure 1-1b). Another method uses the residual connection of the three-phase
CTs (Figure 1-1d) with the relay set higher than the normal system unbalance. The most direct method is
to place a CT in the neutral of a grounded wye connection for equipment such as power transformers or
generators (Figure 1-1c).
Phase Fault Detection
BE1-50 relays can be used in two ways to detect phase faults. The first method is to place an
instantaneous overcurrent element in each phase with the setting higher than expected load current for
any power system element (Figure 1-1a, d, e, f). The second method is called self-balancing differential
protection (Figure 1-2).
www . ElectricalPartManuals . com

1-2 BE1-50 General Information 9171000990 Rev E
In this application, the two leads of each phase of the protected motor or generator are passed through
the window of the same associated phase current transformer so that the resulting secondary current is
zero under normal operating conditions.
Figure 1-2. Self-Balancing Differential Protection
Combination with Other Protective Devices
Because BE1-50 relays can provide complete phase and ground fault protection in one unit (and with
independent settings for phase and ground), they are often used to supervise other relay functions. In
distance protection, BE1-50 relays can be used to prevent misoperation for light loading conditions by
requiring a minimum current level before enabling the distance relay. As a fault detector, they are
particularly effective because of their sensitivity, speed, and dropout ratio.
MODEL AND STYLE NUMBER
BE1-50 electrical characteristics and operational features are defined by a combination of letters and
numbers that make up the style number. Model number BE1-50 designates the relay as a Basler Electric
Instantaneous Overcurrent Relay. The model number, together with the style number, describes the
options included in a specific device and appears on the front panel, draw-out cradle, and inside the case
assembly.
The style number identification chart for the BE1-50 relay is illustrated in Figure 1-3.
www . ElectricalPartManuals . com

9171000990 Rev E BE1-50 General Information 1-3
Figure 1-3. BE1-50 Style Identification Chart
Style Number Example
If a BE1-50 relay has a style number of J6J–A1P–J1E1F, the relay has the following features:
J--------Three-phase-and-neutral current sensing
6--------8.0 to 16.0 A phase sensing input range
J--------Four output relays with normally open contacts
A1------Instantaneous timing
P--------Operating power derived from 125 Vdc or 120 Vac
J--------Four internally operated targets
1--------Push-to-energize outputs
E--------0.5 to 1.0 A neutral sensing input range
1--------One auxiliary output relay with normally open contacts
F--------Semi-flush mounting case
SPECIFICATIONS
BE1-50 electrical and physical specifications are listed in the following paragraphs.
Current Sensing
Sensing inputs are nominally rated at 50/60 Hz and have a frequency range of 40 to 70 Hz. Current
ratings and sensing burdens depend on the sensing range and power supply type (defined by the style
number), and are shown in Table 1-1.
www . ElectricalPartManuals . com

1-4 BE1-50 General Information 9171000990 Rev E
Table 1-1. Current Ratings and Sensing Burdens
Power
Supply Sensing Range Designation Maximum Rating 50 or 60 Hz
Current
For
Phase For Neutral
Actual Sensing
Range K ∗1
Second Continuous Burden Per
Input
1 D 0.25 - 0.5 A 144 12.0 A 0.75 A 8.5 VA
2 E 0.5 - 1.0 A 144 12.0 A 1.5 A 8.5 VA
3 F 1.0 - 2.0 A 625 25.0 A 3 A 8.5 VA
4 G 2.0 to 4.0 A 2500 50.0 A 6 A 8.5 VA
5 H 4.0 to 8.0 A 10000 100 A 12 A 8.5 VA
6 J 8.0 - 16.0 A 40000 200 A 20 A 9.5 VA
F, G, or H
†
7 K 16.0 - 32.0 A 90000 300 A 20 A 14.0 VA
2 E 0.25 - 2.0 A 10000 100 A 5 A 0.2 VA
4 G 1.0 - 8.0 A 90000 300 A 10 A 0.6 VA
O, P, R, S,
or T 6 J 4.0 - 32.0 A 90000 300 A 20 A 4.8 VA
∗Ratings other than continuous may be calculated using the equation:
where:
t
K
I=K =
T =
I =
the indicated value
the time in seconds
maximum current
† Power Supply types F, G, and H are no longer available.
Pickup Range
Continuously adjustable over the range defined by the style number with independent ranges and
adjustments for each phase and neutral pickup.
Pickup Accuracy
±2% or ±40 mA of pickup setting, whichever is greater.
Dropout
Within 2% of pickup.
Timing
1.5 cycles or less from onset of overcurrent condition. (30 milliseconds at 50 Hz, 25 milliseconds at 60
Hz.)
Output Contacts
Resistive Ratings
120 Vac: Make, break, and carry 7 Aac continuously
250 Vdc: Make and carry 30 Adc for 0.2 s, carry 7 Adc continuously,
break 0.3 Adc
500 Vdc: Make and carry 15 Adc for 0.2 s, carry 7 Adc continuously,
break 0.3 Adc
Inductive Ratings
120 Vac, 125 Vdc, 250 Vdc: Break 0.3 A (L/R = 0.04)
www . ElectricalPartManuals . com

9171000990 Rev E BE1-50 General Information 1-5
Power Supply
Externally powered power supply types are listed in Table 1-2.
Table 1-2. Power Supply Ratings
Type Nominal
Input Voltage Input Voltage Range Burden at Nominal
O (midrange) 48 Vdc 24 to 150 Vdc 1.2 W
125 Vdc 24 to 150 Vdc 1.5 W
P (midrange) 120 Vac 90 to 132 Vac 19.3 VA
R (low range) 24 Vdc 12 to 32 Vdc ∗1.3 W
48 Vdc 24 to 150 Vdc 1.2 W
S (midrange) 125 Vdc 24 to 150 Vdc 1.5 W
250 Vdc 68 to 280 Vdc 1.7 W
T (high range) 240 Vac 90 to 270 Vac 31.6 VA
∗Type R power supply initially requires 14 Vdc to begin operating. Once operating, the input voltage may
be reduced to 12 Vdc and operation will continue.
Target Indicators
Electronically latched, manually reset target indicators are optionally available to indicate closure of the
trip output contacts. Either internally operated or current operated targets may be specified. Internally
operated targets should be selected when normally closed (NC) output contacts are specified.
Current Operated Targets
Minimum Rating: 200 mA flowing through the trip circuit
Continuous Rating: 3 A
1 Second Rating: 30 A
2 Minute Rating: 7 A
Type Tests
Shock: Withstands 15 G in each of three mutually perpendicular planes
without structural damage or performance degradation.
Vibration: Withstands 2 G in each of three mutually perpendicular planes,
swept over the range of 10 to 500 Hz for a total of six sweeps, 15
minutes each sweep, without structural damage or degradation of
performance.
Dielectric Strength: Tested in accordance with IEC 255-5 and IEEE C37.90. All circuits to
ground: 2,121 Vdc. Input to Output circuits: 1,500 Vac/2,121 Vdc.
Radio Frequency Interference: Maintains proper operation when tested for interference in
accordance with IEEE C37.90.2-1987, Standard Withstand
Capability of Relay Systems to Radiated Electromagnetic
Interference from Transceivers.
Surge Withstand Capability: Qualified to IEEE C37.90.1-1989, Standard Surge Withstand
Capability (SWC) Tests for Protective Relays and Relay Systems.
Physical
Temperature
Operating Range: –40 to 70°C (–40 to 158°F)
Storage Range: –65 to 100°C (–85 to 212°F)
Weight: 17.5 lb (7.76 kg)
Case Size: S1 (Refer to Section 4 for case dimensions.)
www . ElectricalPartManuals . com

1-6 BE1-50 General Information 9171000990 Rev E
Agency Recognition/Certification
UL Recognition: UL recognized per Standard 508, File E97033
NOTE: Output contacts are not UL recognized for voltages greater
than 250 volts.
Gost-R Certification: Gost-R certified, No. POCC US.ME05.B03391; complies with the
relevant standards of Gosstandart of Russia. Issued by accredited
certification body POCC RU.0001.11ME05.
www . ElectricalPartManuals . com

9171000990 Rev E BE1-50 Controls and Indicators 2-1
SECTION 2 •CONTROLS AND INDICATORS
INTRODUCTION
All BE1-50 controls and indicators are located on the front panel. The controls and indicators are shown
in Figure 2-1 and described in Table 2-1. Figure 2-1 illustrates a relay with the maximum number of
controls and indicators. Your relay may not have all of the controls and indicators shown and described
here.
P0050-26
A
BC
D
E
F
Figure 2-1. BE1-50 Controls and Indicators
Table 2-1. Control and Indicator Descriptions
Locator Description
A Phase Current Adjust. This multi-turn potentiometer sets the pickup point for all phase
overcurrent elements within the relay. Continuously adjustable over the range defined by
the style number.
B Neutral Current Adjust. This multi-turn potentiometer sets the pickup point for the neutral
overcurrent element within the relay. Continuously adjustable over the range defined by
the style number.
C Power Indicator. This red LED lights when operating power is applied to the relay.
D Target Reset Switch. This switch is operated to reset the target indicators.
www . ElectricalPartManuals . com

2-2 BE1-50 Controls and Indicators 9171000990 Rev E
Locator Description
E Target Indicators. These electronically latched red target indicators illuminate when the
corresponding output relay energizes. To ensure proper operation of the current-operated
targets, the current flowing through the trip circuit must be 200 mA or higher. The target
indicators are reset by operating the target reset switch (locator D).
F Output Test Pushbuttons. These pushbuttons allow manual actuation of the output relays.
Output relay actuation is achieved by inserting a nonconductive rod through the front
panel access hole.
www . ElectricalPartManuals . com

9171000990 Rev E BE1-50 Functional Description 3-1
SECTION 3 •FUNCTIONAL DESCRIPTION
INTRODUCTION
BE1-50 Instantaneous Overcurrent relays are static devices that respond to the current magnitude of the
monitored circuit. BE1-50 relay functions are illustrated in Figure 3-1 and described in the following
paragraphs.
Figure 3-1. Function Block Diagram
STEP-DOWN TRANSFORMER
Monitored system currents are applied to the primaries of internal current transformers and stepped down
to internal circuit levels. The internal current transformers provide 1,500 V of isolation for the twelve-volt
logic circuits of the relay.
FULL-WAVE RECTIFIERS
Outputs from each step-down transformer are full-wave rectified and applied to resistor networks to
develop voltages that represent the magnitude of the monitored system currents.
RESPONSE CHARACTERISTICS
Input current signals are rectified and passed through a low pass filter. Filtering smoothes out current
spikes and provides a degree of security against operation on short-term transients.
Filtering also smoothes out the harmonic component effects on current signals. Harmonic component
effects are reduced approximately by 1/n where n is the order of the harmonic. For example, the third
harmonic effect is reduced by filtering to 1/3 of what is would be without filtering. With filtering, the
response characteristics are similar to those of electromechanical relays.
www . ElectricalPartManuals . com

3-2 BE1-50 Functional Description 9171000990 Rev E
PICKUP SETTINGS
A front panel multiple-turn potentiometer controls the pickup setting for all phases. The potentiometer
establishes the reference voltage representative of the system current, which will cause the relay to
respond. On relay styles monitoring neutral current, an independent potentiometer is provided to establish
the pickup level for neutral.
PICKUP COMPARATORS
The magnitude of each monitored current is compared with the appropriate pickup setting. When a pickup
setting is exceeded, a pulse stretcher for that phase (or neutral) is activated.
PULSE STRETCHERS
Because the sensed currents are full-wave rectified and minimally filtered to retain high-speed operation,
the pulse output from the comparators must be extended.
OUTPUTS
Defined by the style number, individual output relays may be provided for each monitored phase (and
neutral). One output relay may serve for all monitored phases (and neutral). In addition, one auxiliary
output relay may be provided that serves for all monitored phases (and neutral).
PUSH-TO-ENERGIZE OUTPUT PUSHBUTTONS
Small pushbutton switches may be provided as an option to allow testing the primary output contacts and
(if present) the auxiliary output contact. To prevent accidental operation, the pushbuttons are recessed
behind the front panel and are depressed by inserting a thin, non-conducting rod through an access hole
in the front panel.
POWER SUPPLY STATUS OUTPUT
The optional power supply status relay has a set of normally closed contacts and energizes when
operating power is applied to the BE1-50. If relay operating power is lost or one side of the power supply
output (+12 Vdc or –12 Vdc) fails, the power supply status relay de-energizes and opens the power
supply status output contacts. If the power supply status output is provided, then the auxiliary contact is
not available.
POWER SUPPLY
Operating power for the relay circuitry is supplied by a wide range, electrically isolated, low-burden power
supply. Power supply operating power is not polarity sensitive. The front panel power LED and power
supply status output indicate when the power supply is operating. Power supply specifications are listed
in Table 1-2.
TARGET INDICATORS
Target indicators are optional components selected when a relay is ordered. The electronically latched
and reset targets consist of red LED indicators located on the relay front panel. A latched target is reset
by operating the target reset switch on the front panel. If relay operating power is lost, illuminated
(latched) targets are extinguished. When relay operating power is restored, the previously latched targets
are restored to their latched state.
A relay can be equipped with either internally operated targets or current operated targets.
Internally Operated Targets
The relay trip outputs are directly applied to drive the target indicators. The indicators are illuminated
regardless of the current level in the trip circuit.
www . ElectricalPartManuals . com

9171000990 Rev E BE1-50 Functional Description 3-3
Current Operated Targets
Current operated targets are triggered by closure of the output contacts and the presence of at least 200
milliamperes of current flowing in the trip circuit.
NOTE
Prior to September 2007, BE1-50 target indicators consisted of magnetically
latched, disc indicators. These mechanically latched target indicators have been
replaced by the electronically latched LED targets in use today.
www . ElectricalPartManuals . com

3-4 BE1-50 Functional Description 9171000990 Rev E
This page intentionally left blank.
www . ElectricalPartManuals . com