Basler Electric BE1-27 User Manual

INSTRUCTION MANUAL

FOR

UNDERVOLTAGE, OVERVOLTAGE,

UNDER/OVERVOLTAGE RELAYS

BE1-27, BE1-59, BE1-27/59

Publication: 9170600990
Revision: L 12/12

INTRODUCTION

This instruction manual provides information about the operation and installation of the BE1-27
Undervoltage Relay, the BE1-59 Overvoltage Relay, and the BE1-27/59 Under/Overvoltage 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.

9170600990 Rev L BE1-27/59 Introduction i

First Printing: January 1986

Printed in USA

© 1986-2012 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 BE1-27/59 Introduction 9170600990 Rev L

REVISION HISTORY

The following information provides a historical summary of the changes made to the BE1-27, BE1-59, and
BE1-27/59 instruction manual (9170600990). Revisions are listed in reverse chronological order.

Manual

Revision and Date

L, 12/12

K, 09/11

J, 07/08

H, 02/08

G, 09/07

F, 06/07

E, 07/04

D, 06/03

C, 11/99

—, 01/86

Change

 Standardized case and cover drawings in Section 4.

 Changed notes 3 and 4, and added note 5 in Style Chart in Section 1.
 Updated GOST-R statement in Section 1.
 Updated Storage statement in Section 4.

 Modified style chart in Section 1 by adding note #4 to Timing options

C4 through D8.

 Removed “Range 2” from Figures 3-3, 3-5, 3-6, and 3-7.

 Consolidated sensing input range options in style chart of Figure 1-2

to cover all relay models.

 Updated Output Contacts ratings in Section 1.
 Moved content of Section 6, Maintenance to Section 4.
 Updated front panel illustrations to show laser graphics.
 Moved content of Section 7, Manual Change Information to manual

introduction.

 Added manual part number and revision to all footers.
 Updated cover drawings.
 Updated power supply burden data in Section 1.
 Updated target Indicator description in Section 3.

 Updated specifications listed in Section 1.

 Added missing square root symbol to equations of System Voltages

paragraph in Section 3, Functional Description.

 Revised Resistive and Inductive Output Contact Ratings on page 1-4.
 Updated the Definite Time Accuracy setting on page 1-5.
 Deleted Range 2 row from Figures 3-2 through 3-4.
 Added a new step (Step 3) under Timing for instantaneous to page 5-

4.

 Changed the table that Note 2 referred to in Figure 5-2.
 Page 5-5, Table 5-3, Timing Test Results, Definite Timing Type specs

were changed.

 Revised the manual to the current standard format.
 Changed characteristic curves figures in Section 3 to improve the

accuracy.

 Added ground terminals to new Figures 1-1 and 4-16.
 Added interconnection diagrams, Figures 4-13, 4-14, and 4-15.
 Added Section 7, Manual Change Information.

 Initial release

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iv BE1-27/59 Introduction 9170600990 Rev L

CONTENTS

SECTION 1  GENERAL INFORMATION ................................................................................................ 1-1

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

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

Motor Protection ........................................................................................................................... 1-1

Automatic Transfer Switching ....................................................................................................... 1-1

Cogeneration ................................................................................................................................ 1-1

Transformer Protection ................................................................................................................. 1-2

Ground Fault Detection ................................................................................................................ 1-2

MODEL AND STYLE NUMBER .......................................................................................................... 1-2

Style Number Example ................................................................................................................. 1-4

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

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

Undervoltage and Overvoltage Pickup Range ............................................................................. 1-4

Timing Characteristics .................................................................................................................. 1-4

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

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

Target Indicators ........................................................................................................................... 1-5

Type Tests .................................................................................................................................... 1-5

Temperature ................................................................................................................................. 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

SYSTEM VOLTAGES ......................................................................................................................... 3-1

STEP-DOWN TRANSFORMER ......................................................................................................... 3-2

LOW-PASS FILTER AND FULL WAVE RECTIFIER ......................................................................... 3-2

PICKUP SETTINGS ............................................................................................................................ 3-2

PICKUP COMPARATORS.................................................................................................................. 3-2

TIMER CIRCUIT ................................................................................................................................. 3-2

OUTPUTS ........................................................................................................................................... 3-6

PUSH-TO-ENERGIZE OUTPUT PUSHBUTTONS ............................................................................ 3-6

POWER SUPPLY STATUS OUTPUT ................................................................................................ 3-6

POWER SUPPLY ............................................................................................................................... 3-6

TARGET INDICATORS ...................................................................................................................... 3-6

Internally Operated Targets .......................................................................................................... 3-6

Current Operated Targets ............................................................................................................ 3-6

SECTION 4  INSTALLATION .................................................................................................................. 4-1

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

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

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

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

MAINTENANCE ................................................................................................................................ 4-19

STORAGE ......................................................................................................................................... 4-19

SECTION 5  TESTING ............................................................................................................................ 5-1

TRODUCTION ................................................................................................................................. 5-1

IN

REQUIRED TEST EQUIPMENT ........................................................................................................ 5-1

OPERATIONAL TEST ........................................................................................................................ 5-1

Power Supply Status Output ........................................................................................................ 5-1

Pickup ........................................................................................................................................... 5-1

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

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vi BE1-27/59 Introduction 9170600990 Rev L

SECTION 1 • GENERAL INFORMATION

Purpose

The BE1-27 Undervoltage, BE1-59 Overvoltage and the BE1-27/59 Under/Overvoltage Relays are solid­state devices that provide reliable protection for generators, motors, and transformers against adverse
system voltage conditions.

Application

Electric power systems are designed for constant voltage operation. Loads utilizing commercial electric
power are designed to operate at a constant input voltage level with some tolerance. Radical voltage
variations on a power system are indicative of a system malfunction. Protective relays that monitor
system voltage and provide an output signal when the voltage goes outside predetermined limits, find a
variety of applications. Some of these applications include motor and transformer protection, interface
protection for cogeneration systems, and supervision of automatic transfer switching schemes.

Motor Protection

When selecting the type of protection for motor applications, the motor type, voltage rating, horsepower,
thermal capability during start-up, and exposure to automatic transfer restarting following a voltage
interruption need to be considered. During motor start-up, a low terminal voltage condition will inhibit the
motor from reaching rated speed. The BE1-27 Undervoltage Relay will detect this low voltage condition
and trip. Critical applications requiring continuous motor operation and applications where overloads
during start-up may be maintained for a given time period, usually have a definite time or inverse time
delay characteristic incorporated to avoid unnecessary tripping during low voltage dips. If the
undervoltage condition persists for the established time delay, the relay output contacts are connected to
the station alarm annunciator panel, allowing the station operator to take corrective action. The BE1-59
Overvoltage Relay is applied to insure the voltage does not exceed the limits established by the machine
manufacturer for proper operation. Overvoltage conditions stress the insulation level of the equipment and
may cause a dielectric breakdown resulting in a flash over to ground.

Automatic Transfer Switching

Distribution substations are sometimes designed with duplicate supply circuits and transformers to
eliminate service interruptions due to faults located on the primary feeder. In order to restore service
within a given acceptable time period, automatic transfer switching can be applied to initiate the throw
over from primary power to the alternate power source. The BE1-27 Undervoltage Relay can initiate
switching after a given time delay to void transfer switching during temporary low voltage conditions. To
return the substation to normal service upon the restoration of primary voltage, the BE1-59 Overvoltage
Relay supervises the transition to its normal operating condition.

Cogeneration

Utilities employ the use of a voltage check scheme to supervise reclosing at the substation when
cogenerators are connected to a radial distribution feeder and the cogenerator is capable of supplying the
entire load when the utility circuit breaker is open. During a faulted condition, the utility requires the
cogenerator to be disconnected from the system before reclosing the utility breaker. If the cogenerator is
connected to the system, the utility will reclose to an energized line.

This could result in reconnecting two systems out of synchronism with each other. A BE1-27
Undervoltage Relay monitoring the line voltage will inhibit reclosing of the utility circuit breaker if the
cogenerator energizes the line.

At the interface between the utility and the cogenerator, overvoltage and undervoltage relays are installed
as minimum protection to provide an operating voltage window for the cogenerator. During faulted
conditions, when the cogenerator may become overloaded, the BE1-27 Undervoltage Relay will detect
the decline in voltage and remove the cogenerator from the system. The BE1-59 Overvoltage Relay will
protect the system from overvoltage conditions that occur when power factor correction capacitors are
located on the feeder.

9170600990 Rev L BE1-27/59 General Information 1-1

Transformer Protection

BE1-59

7

6

D2816-13

05-29-98

Voltage relays can be applied to protect large transformers from damage because of overexcitation. The
concern for transformer overvoltage may be minimized in many power system applications where proper
voltage control of the generating unit is provided. However, where a tap changing regulating transformer
is located between the generating source and the load, some form of voltage protection may be required
to supplement the tap changing control and to prevent equipment damage due to over, as well as
undervoltage resulting from a failure of the tap changing control. The BE1-27/59 Under/Overvoltage Relay
is well suited for these applications.

Ground Fault Detection

In a three-phase, three-wire system, a single conductor may break or the insulation may deteriorate
resulting in a high resistance ground fault that may not be detected by the overcurrent relays. This
condition, however, may be sensed by an overvoltage relay connected to a grounded wye, broken delta
set of potential transformers (PT's) as illustrated in Figure 1-1 with this connection, and a sensitive relay
setting, an unbalanced voltage condition such as described above, can be quickly detected and isolated.

Figure 1-1. Ground Fault Detection

Model and Style Number

BE1-27, BE1-59, and BE1-27/59 electrical characteristics and operational features are defined by a
combination of letters and numbers that make up the style number. Model number BE1-27/59 designates
the relay as a Basler Electric Under/Overvoltage Protective 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 BE1-27/59 relay is illustrated in Figure 1-2.

1-2 BE1-27/59 General Information 9170600990 Rev L

Figure 1-2. Style Number Identification Chart

9170600990 Rev L BE1-27/59 General Information 1-3

Style Number Example

If a BE1-27/59 relay has a style number of A3F–E1J–A0S1F, the relay has the following features:

A ------- Single-phase voltage sensing input

3 -------- Sensing input compatible with a pickup adjustment range of 55 to 160 Vac

F -------- 2 normally open output relays (one per function)

E1 ------ Definite timing for each function

J -------- Relay control power is 125 Vdc or 120 Vac, nominal

A ------- Two internally operated target indicators (one per function)

0 -------- No instantaneous functions

S ------- Push-to-energize outputs

1 -------- Two normally-open auxiliary output relays (one per function)

F -------- Semi-flush mounting case

Specifications

Electrical and physical specifications are listed in the following paragraphs.

Voltage Sensing Inputs

Nominally rated at 50/60 Hz, (120/240 V or 100/200 V) with a maximum continuous voltage rating of 360
V (120 V nominal) or 480 V (240 V nominal) at a burden less than 1 VA per phase. Frequency range is
from 40 to 70 Hz.

Undervoltage and Overvoltage Pickup Range

Pickup Range ................................... Continuously adjustable over the range of 1 to 40, 55 to 160, or 110

to 320 Vac as defined by the Style Chart. See Section 3, Functional
Description, System Voltages, for explanation of pickup ranges.

Pickup Accuracy ............................... ±2% or ±0.5 volts of the pickup setting, whichever is greater.

Dropout ............................................. ±2% of pickup.

Timing Characteristics

Instantaneous ................................... Less than 50 milliseconds for a voltage level that exceeds the pickup

setting by 5% or 1 volt, whichever is greater

Definite .............................................. Adjustable from 0.1 to 9.9 seconds, in steps of 0.1 seconds.

Accuracy is ±2% or ±50 milliseconds, whichever is greater. (A setting
of 0.0 provides instantaneous timing.)

Inverse .............................................. Inverse curve types are defined by the Style Chart and are

represented by the curves shown in Section 3, Functional
Description. Inverse time is adjustable from 01 to 99 in increments of

01. Incrementing the time dial varies the inverse curve along the Y
axis. A setting of 00 designates instantaneous timing.

Accuracy is within ±5% or 50 milliseconds (whichever is greater) of

the indicated time for any combination of the time dial setting and
pickup setting and is repeatable within ±2% or 50 ms (whichever is
greater) for any combination of time dial and tap setting. Curves
were generated with Prefault voltage at 10% greater than pickup for
the 27 curves and 10% less than pickup for the 59 curves. For
Prefault voltages that are greater in difference from the pickup
setting, the timing accuracy is ±10% or 100 ms (whichever is
greater).

1-4 BE1-27/59 General Information 9170600990 Rev L

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 1-1.

Table 1-1. Power Supply Ratings

Type

K (midrange) 48 Vdc 24 to 150 Vdc 3.8 W

J (midrange)

L (low range) 24 Vdc

Y (midrange)

Z (high range)

* Type L power supply initially requires 14 Vdc to begin operating. Once operating, the input voltage may
be reduced to 12 Vdc and operation will continue.

Nominal

Input Voltage

125 Vdc 24 to 150 Vdc 4.0 W

120 Vac 90 to 132 Vac 17.1 VA

48 Vdc 24 to 150 Vdc 3.8 W

125 Vdc 24 to 150 Vdc 4.0 W

250 Vdc 68 to 280 Vdc 4.1 W

240 Vac 90 to 270 Vac 28.4 VA

Input Voltage

Range

12 to 32 Vdc *

Burden at

Nominal

3.9 W

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: 2,000 Vac

applied for 1 min

Impulse Test ..................................... Qualified to IEC 255-5

9170600990 Rev L BE1-27/59 General Information 1-5

Radio Frequency Interference .......... Qualified to IEEE C37.90.2-1995, Standard for 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.

Temperature

Operating Range .............................. –40 to 70°C (–40 to 158°F)

Storage Range .................................. –65 to 100°C (–85 to 212°F)

Physical

Weight ............................................... 14 lbs (6.35 kg)

Case Size ......................................... S1 (See Section 4 for panel cutting/drilling 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 BE1-27/59 General Information 9170600990 Rev L

SECTION 2 • CONTROLS AND INDICATORS

Introduction

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.

Figure 2-1. Location of Controls and Indicators

9170600990 Rev L BE1-27/59 Controls and Indicators 2-1