Basler Electric BE1-40Q User Manual

INSTRUCTION MANUAL

FOR

LOSS OF EXCITATION RELAY

BE1-40Q

Publication: 9171500990
Revision: N 12/12

INTRODUCTION

This instruction manual provides information about the operation and installation of the BE1-40Q Loss of
Excitation 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.

9171500990 Rev N BE1-40Q Introduction i

First Printing: November 1986

Printed in USA

© 2012 Basler Electric, Highland Illinois 62249 USA

All Rights Reserved

December 2012

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.

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

12570 STATE ROUTE 143

HIGHLAND IL 62249 USA

http://www.basler.com, [e-mail]

PHONE [phone] FAX [phone]

ii BE1-40Q Introduction 9171500990 Rev N

REVISION HISTORY

The following information provides a historical summary of the changes made to the BE1-40Q instruction
manual (9171500990). Revisions are listed in reverse chronological order.

Manual

Revision and Date

N, 12/12

M, 01/11

L, 09/07

K, 02/01

J, 10/98

H, 03/95

G, 01/94

 Standardized case and cover drawings in Section 4.
 Updated equations in Note 1 under Figure 5-2.

 Improved timing specs under Operational Test, Timing Verification in

Section 5.

 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.
 Updated S1 case drawings in Section 4 to the most recent drawings.
 Corrected Voltage Sensing in Specifications from “Each have a

burden that is less than 0.1 ohm over the” to “Each have a burden
that is less than 1 VA over the”.

 Deleted 500 Vdc from Resistive Output Circuits.
 Deleted all references to Service Manual.
 Updated Style Number Identification Chart by changing Power Supply

Type T from “230 Vac” to “240 Vac”.

 Added new power supply information to Specifications and Section 3

starting with “Basler Electric enhanced the power supply design…”

 Changed the format of the manual.
 Changed Section 1, General Information, Specifications, Output

Circuits and Isolation.

 Added phase rotation sensitivity information to Section 3, Functional

Description.

 Changed Section 4, Installation, Dielectric Test, to reflect specification

changes.

 Corrected Figure 4-1 and changed Figure 5-2, note 2.
 Corrected typographical error in Table 5-4, Reactive Power (Vars),

+120.

 Corrected typographical error in Section 6, Maintenance, General.
 Deleted references to mho characteristic.

 Corrected Figure 4-3 (Sensing Input Test Setup), current sensing

input terminals 8 and 9 were reversed on earlier versions;
renumbered equations; updated format; and added new internal
connection diagrams Figures 4-3 through 4-5, added new mounting
diagrams Figures 4-6 through 4-14.

 Added new Section 5, Setting and Testing, moved appropriate data

from Section 4 into Section 5, and changed Section 5 and 6 to
Section 6 and 7.

Change

9171500990 Rev N BE1-40Q Introduction iii

Manual

Revision and Date

F, 01/91

E, 09/90

D, 08/89

C, 06/89

B, 11/88

A, 11/88

—, 01/86

Change

 Pages 1-3, 1-5 (Style Chart), 1-7 2-1 (Item H), 4-4 (step 3), 4-7 (Step

3): Time delay range is 0.1 to 9.90 seconds, adjustable in increments
of 0.1 seconds. This was previously unclear or (in some cases)
erroneous.

 Page 1-8: RFI specification added.
 Pages 1-6, 5-1: minor editing.

 Legend of Figure 3-2 corrected.
 Page 3-1 (under “Phase Shift”): 68 was 52.

 Equations 4.1 through 4.4 put into standard form by removing

negative sign from the angle theta.

 Figure 3-2 corrected.
 Equations on page 4-8 restated for clarification.
 Arithmetical errors corrected in the example given on page 4-8.
 Table 4-2 corrected.
 Figure 4-3 was reformatted.
 Figure 4-7 revised to clarify installation.

 Minor corrections and editing.
 Figure 3-3 added.

 Editing changes made to clarify specifications.
 Two articles added to Section 4, entitled, “Setting the Pickup” (page

4-5) and, “Relay Characteristic Verification” page 4-7.

 Initial release

iv BE1-40Q Introduction 9171500990 Rev N

CONTENTS

SECTION 1 • GENERAL INFORMATION ................................................................................................ 1-1

PURPOSE ........................................................................................................................................... 1-1

APPLICATION .................................................................................................................................... 1-1

Capability Curves ......................................................................................................................... 1-1

BE1-40Q Operating Characteristics ............................................................................................. 1-1

Time Delay .................................................................................................................................... 1-1

MODEL AND STYLE NUMBER .......................................................................................................... 1-3

Style Number Example ................................................................................................................. 1-3

SPECIFICATIONS .............................................................................................................................. 1-4

Current Sensing ............................................................................................................................ 1-4

Current Sensing Burden ............................................................................................................... 1-4

Voltage Sensing ........................................................................................................................... 1-4

Pickup Range ............................................................................................................................... 1-4

Pickup Accuracy ........................................................................................................................... 1-4

Dropout ......................................................................................................................................... 1-4

Time Delay Range ........................................................................................................................ 1-4

Timing Accuracy ........................................................................................................................... 1-4

Output Contacts ............................................................................................................................ 1-5

Power Supply................................................................................................................................ 1-5

Target Indicators ........................................................................................................................... 1-6

Type Tests .................................................................................................................................... 1-6

Physical ........................................................................................................................................ 1-6

Agency Recognition/Certification.................................................................................................. 1-6

SECTION 2 • CONTROLS AND INDICATORS ....................................................................................... 2-1

INTRODUCTION ................................................................................................................................. 2-1

SECTION 3 • FUNCTIONAL DESCRIPTION ........................................................................................... 3-1

INTRODUCTION ................................................................................................................................. 3-1

VOLTAGE SENSING .......................................................................................................................... 3-1

PHASE SHIFT ..................................................................................................................................... 3-1

CURRENT SENSING ......................................................................................................................... 3-2

HI/LOW RANGE SWITCH .................................................................................................................. 3-2

TAP SWITCH ...................................................................................................................................... 3-3

TRANSDUCER ................................................................................................................................... 3-3

COMPARATOR .................................................................................................................................. 3-3

TIMING ................................................................................................................................................ 3-3

OUTPUTS ........................................................................................................................................... 3-3

PUSH-TO-ENERGIZE OUTPUT PUSHBUTTON .............................................................................. 3-3

POWER SUPPLY STATUS OUTPUT ................................................................................................ 3-3

POWER SUPPLY ............................................................................................................................... 3-3

TARGET INDICATORS ...................................................................................................................... 3-4

Internally Operated Targets .......................................................................................................... 3-4

Current Operated Targets ............................................................................................................ 3-4

SECTION 4 • INSTALLATION ................................................................................................................. 4-1

INTRODUCTION ................................................................................................................................. 4-1

RELAY OPERATING GUIDELINES AND PRECAUTIONS ............................................................... 4-1

MOUNTING ......................................................................................................................................... 4-1

CONNECTIONS ................................................................................................................................ 4-14

MAINTENANCE ................................................................................................................................ 4-17

STORAGE ......................................................................................................................................... 4-17

9171500990 Rev N BE1-40Q Introduction v

SECTION 5 • TESTING ............................................................................................................................ 5-1

SETTING ............................................................................................................................................. 5-1

Per Unit Conversion Example ...................................................................................................... 5-1

OPERATIONAL TEST ........................................................................................................................ 5-2

Introduction ................................................................................................................................... 5-2

Pickup Verification ........................................................................................................................ 5-2

Timing Verification ........................................................................................................................ 5-4

Relay Characteristics Verification ................................................................................................. 5-4

vi BE1-40Q Introduction 9171500990 Rev N

SECTION 1 • GENERAL INFORMATION

PURPOSE

Loss of excitation protection is applied on nearly all synchronous generators. Reduced or complete loss of
excitation can cause loss of synchronism, instability and, possibly, damage to the generator from
overheating. Many modern excitation systems include minimum-excitation limiters to prevent
underexcitation; however, loss of excitation protective relays are still applied as backup to these
automatic controls. BE1-40Q Loss of Excitation Relays provide this protection by monitoring the field
excitation (measuring t he magnitude and direct ion of var flow) and tripp ing the generator befor e serious
damage to the generator can occur.

Synchronous generators in parallel are normally operated in the overexcited (lagging) region, which
allows generation o f reactive pow er (vars). Altho ugh the field ex citation may be safely adjusted to cause
the generator to abs orb vars (leading), this is usu ally avoided because stability is unreliable under this
condition.

When field excitation is not sufficient to m aintain the ter minal voltage of a n interconnect ed generator, the
system will attempt to supply reactive power to excite the generator. If the system cannot supply the
required vars, the weakened field may allow the rotor to slip poles during disturbances such as load
changes or faults, causing loss of synchronism.

When the system can supply the necessary vars, the generator will act as an induction generator,
drawing excitation fro m the system. The machine vo ltage will remain above the s etting of undervoltage
relays, but the current induced by the rotor slip will flow in the damper (amortisseur) windings. The
excessive heating caused by the current flow reduces machine life exponentially.

Under either condition, BE1-40Q Relays will detect the increased vars at the generator terminals as a loss
of excitation and trips the generator to prevent loss of synchronism or excessive heating within the
generator.

APPLICATION

Capability Curves

Generator manufacturer s supply c apability c urves that s pecify the opera ting limits of a particular mac hine
(similar to those shown in Figure 1-1). The curves ar e derived from the h eating charac teristics that oc cur
on the stator end iron, th e s tator windi ng, and t he roto r wind ing. Plott ed on the co mplex power pla ne, real
power P (kW) is on the horizontal axis and reactive power Q (var) is on the vertical axis.

An additional limit is often included on these curves, as shown in Figure 1-2. Here, the steady state
stability limit further defi nes the safe operating limit of the gen erator. If the stability limit is exceeded, an
out-of-step condition can occur due to loss of synchronism.

BE1-40Q Operating Characteristics

BE1-40Q relay charac teristics c losely follow the gen erator capabi lity curves. The r esponse character istic
is represented by a line eight degrees from horiz ontal, placed above the most restrictive limit of nor mal
operation. As shown in Figure 1-3, the attendant inter c ept of the l ine o n the Q axi s (at –0.4 per unit v ar s in
this example) is used to es tablish the pickup of the relay. A front panel rot ary switch is used to set the
TAP setting. Refer to Section 5, Setting and Testing , for specific informat ion on determining the pickup
setting.

Time Delay

A time delay is included in BE1-40Q Relays to prevent misoperation for transient conditions such as
power swings due to s ynchronizing or externa l fault clearing. A definite time delay of 0.1 to 9.9 seconds
can be set on the fro nt panel thumbwheels in increments of 0.1 s econd. Setting both thumbw heels to 0
causes an instantaneous trip signal t o be sent when t he TAP setting is ex ceeded. Refer to Section 5 for
specific setting information.

9171500990 Rev N BE1-40Q General Information 1-1

Figure 1-1. Typical Generator Capability Curve

Figure 1-2. Normal Operation with Steady State Stability Limit

Figure 1-3. An example of BE1-40Q Relay Operating Characteristics

1-2 BE1-40Q General Information 9171500990 Rev N

MODEL AND STYLE NUMBER

BE1-40Q electrical charact eristics and operational features are defined by a combination of lett ers and
numbers that make up the style number. Model number BE1-40Q designates the relay as a Basler
Electric Loss of Excitation Relay. The model number, together with the style number, describes the
options included in a sp ecif ic device and app ears on the front panel, draw -out c radle, an d ins ide the c ase
assembly.

The style number identification chart for the BE1-40Q relay is illustr at ed in Figure 1-4.

Figure 1-4. BE1-40Q Style Identification Chart

Style Number Example If a BE1-40Q relay has a style number of F3E–E1O–B1S2F, the relay has the following features:

F -------- 60 Hz single-phase current sensing
3 -------- 120 Vac, 25-1000 var
E -------- One output relay with normally open contacts
E1 ------ Definite timing
O ------- Operating power derived from 48 Vdc
B -------- One current operated target
1 -------- Push-to-energize output
S -------- Power supply status output
2 -------- One auxiliary output relay with normally closed contacts
F -------- Semi-flush mounting case

9171500990 Rev N BE1-40Q General Information 1-3

SPECIFICATIONS

BE1-40Q electrical and physical specifications are listed in the following paragraphs.

Current Sensing

Unit is designed to operate from the secondar y of a st andard cur rent trans former r ated at 5 A, 50 and 60
Hz (based on configurat ion). Internal cur rent sensing t ransformers are r ated at 10 A continu ous, 15 A for
1 minute, and 200 A for 1 second.

Current Sensing Burden

Maximum sensing burden is less than 0.1 ohm at pickup over the frequency range of 45 to 65 Hz.

Voltage Sensing

Three line-to-line volt age sensing inputs are available: 120 , 208, and 240 Vac (nominal). Each have a
burden that is less than 1 VA over the frequency range of 45 to 65 Hz.

Pickup Range

Refer to Table 1-1.

Table 1-1. Pickup Ranges

Sensing Input

Range

2

120 Vac

3

120 Vac

5

208 Vac

6

208 Vac

8

240 Vac

9

240 Vac

Pickup Accuracy

±2% of the front panel setting or ±0.1 var, whichever is greater for a power factor angle of –90°.

Tap A B C D E F G H J K

HI 20 40 60 80 100 120 140 160 180 200

LOW 5.0 10 15 20 25 30 35 40 45 50

HI 100 200 300 400 500 600 700 800 900 1000

LOW 25 50 75 100 125 150 175 200 225 250

HI 40 80 120 160 200 240 280 320 360 400

LOW 10 20 30 40 50 60 70 80 90 100

HI 200 400 600 800 1000 1200 1400 1600 1800 2000

LOW 50 100 150 200 250 300 350 400 450 500

HI 40 80 120 160 200 240 280 320 360 400

LOW 10 20 30 40 50 60 70 80 90 100

HI 200 400 600 800 1000 1200 1400 1600 1800 2000

LOW 50 100 150 200 250 300 350 400 450 500

Dropout

Not less than 95% of actual pickup.

Time Delay Range

Definite time delay is adjustable by two front panel thumbwheels over a range of 01 to 99 (0.1 to 9.9
seconds) in increments of 0.1 seconds. A setting of 00 enables instantaneous operation.

Timing Accuracy

Shown in Figure 1-5. Note that eac h curve is slightly offset by a factor that repr esents integration time.
Repeatability is within ±5% or 25 milliseconds, whichever is greater.

1-4 BE1-40Q General Information 9171500990 Rev N

Input Voltage

O (midrange)

48 Vdc

24 to 150 Vdc

1.9 W

125 Vdc

24 to 150 Vdc

2.2 W

120 Vac

90 to 132 Vac

18.4 VA

R (low range)

24 Vdc

12 to 32 Vdc ∗

1.9 W

48 Vdc

24 to 150 Vdc

1.9 W

250 Vdc

68 to 280 Vdc

2.3 W

240 Vac

90 to 270 Vac

32.1 VA

Figure 1-5. Typical Relay Response Time for Time Dial Settings

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)

Power Supply

Power supply types and specifications are listed in Table 1-2.

Table 1-2. Power Supply Ratings

Type

P (midrange)

S (midrange)

T (high range)

∗ Type R power supply initi ally requir es 14 Vdc to begi n operat ing. Onc e operati ng, the i nput v oltage m ay
be reduced to 12 Vdc and operation will continue.

9171500990 Rev N BE1-40Q General Information 1-5

Nominal

125 Vdc 24 to 150 Vdc 2.2 W

Input Voltage Range Burden at Nominal

Target Indicator

An electronically latched, manually reset targ et indicator is optionally avai lable to indicate closure of the
trip output contact. Either an internally operated or a current operated target may be specified. An
internally operated target should be selected when a normally closed (NC) output contact is specified.

Current Operated Target
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 accor dance wit h 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, Stand ar d Withs tand

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: 13.5 lb (6.12 kg)
Case Size: S1 (Refer to Section 4 for case dimensions.)

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 per the relevant standards of Gosstandart of

Russia.

1-6 BE1-40Q General Information 9171500990 Rev N

SECTION 2 • CONTROLS AND INDICATORS

Locator

Description

INTRODUCTION

All BE1-40Q cont rols and indicat ors ar e located on th e front pan el. Th e controls and indic ators are show n
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 hav e all of the controls and indicators shown and des cribed
here.

Figure 2-1. BE1-40Q Controls and Indicators

Table 2-1. Control and Indicator Descriptions

A

B Pickup Indicator. LED illuminates to indicate that the pickup level has been exceeded.
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 indicator.
E

9171500990 Rev N BE1-40Q Controls and Indicators 2-1

Tap Switch. A ten-posi tion rotary switch sets the pic kup point when used in con junction
with the Range switch (see Locator I). Pickup levels (in vars) are labeled on the Tap
Range Chart (see Locator E).

Tap Range Chart. Provides an index of re active power leve ls (in vars) that corr espond to
the Tap switch positions.