TRENDnet BE1-87G User Manual

+05647%6+10/#07#.

(14

8#4+#$.'2'4%'06#)'&+(('4'06+#.

4'.#;

$')

2WDNKECVKQP 

4GXKUKQP ,

INTRODUCTION

This manual provides information concerning the operation and installation of the BE1-87G Variable Percentage Differential Relay. To accomplish this, the following is provided.

Specifications Functional description Mounting information Setting procedure/example.

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.

BE1-87G - Introduction i

First Printing: December 1985

Printed in USA

May 1999

CONFIDENTIAL INFORMATION

OF BASLER ELECTRIC COMPANY, HIGHLAND, IL. IT IS LOANED FOR CONFIDENTIAL USE, SUBJECT TO RETURN ON REQUEST, AND WITH THE MUTUAL UNDERSTANDING THAT IT WILL NOT BE USED IN ANY MANNER DETRIMENTAL TO THE INTEREST OF BASLER ELECTRIC COMPANY.

It is not the intention of this manual to cover all details and variations in equipment, nor does this manual provide data for every possible contingency regarding installation or operation. The availability and design of all features and options are subject to modification without notice. Should further information be required, contact Basler Electric Company, Highland, Illinois.

BASLER ELECTRIC

ROUTE 143, BOX 269

HIGHLAND, IL 62249 USA

http://www.basler.com, infor@basler.com

PHONE 618-654-2341 FAX 618-654-2351 ii BE1-87G - Introduction

CONTENTS

SECTION 1 GENERAL INFORMATION 1-1

Description ..............................................1-1

Applications .............................................1-1

Variable Restraint Characteristic ..........................1-3

Design Highlights ......................................1-3

Model and Style Number ...................................1-3

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

Style Number Identification Chart .........................1-4

Specifications ............................................1-5

SECTION 2 CONTROLS AND INDICATORS 2-1 SECTION 3 FUNCTIONAL DESCRIPTION 3-1

General .................................................3-1

Functional Description .....................................3-1

Current Transformers ...................................3-1

Stabilizing Reactor .....................................3-2

Bandpass Filters ......................................3-3

Comparator ..........................................3-3

Outputs .............................................3-3

Targets (Optional) .....................................3-3

Push-To-Energize (Optional) .............................3-3

Power Supply Status Output (Optional) .....................3-3

Power Supply .........................................3-4

SECTION 4 INSTALLATION 4-1

General .................................................4-1

Dielectric Test ............................................4-1

Mounting ................................................4-1

Relay ...............................................4-1

S1 Case, Outline Dimensions ............................4-1

S1 Case, Double-Ended, Outline Dimensions ................4-2

S1 Case, Panel Drilling Diagram ..........................4-3

Stabilizing Reactor .....................................4-4

S1 Case And Reactor, Outline Dimensions ..................4-5

Connections .............................................4-5

Typical DC Control Connections ..........................4-6

Single-Phase Sensing Input Connections ...................4-6

Three-Phase Sensing Input Connection ....................4-7

Single Phase Internal Connection Diagram ..................4-8

Three Phase Internal Connection Diagram ..................4-9

SECTION 5 TESTING AND SETTING 5-1

General .................................................5-1

Relay Operating Precautions ................................5-1

Dielectric Test ............................................5-1

Equipment Required .......................................5-1

Operational Test Procedure .................................5-2

Operational Test Setup .................................5-2

Location Of Assemblies (Single-Phase Only) ................5-3

TP-1 And TP-2 On Single-Phase Relays ....................5-3

Single-Phase Trip And Dropout Test .......................5-4

BE1-87G - Introduction iii

CONTENTS -

Continued

SECTION 5 TESTING AND SETTING -

Sensing Input Range 1, Operating Characteristics ............ 5-5

Sensing Input Range 2, Operating Characteristics ............ 5-6

Extended Restraint Operating Characteristic ................... 5-7

Pickup Response Timing ............................... 5-7

Phases B And C, Trip And Dropout Test ................... 5-8

Target Test .......................................... 5-8

Auxiliary Output Test .................................. 5-8

Push To Energize Output Test ........................... 5-8

Power Supply Status Output Test ......................... 5-8

Setting The Relay ........................................ 5-8

General ............................................. 5-8

Setting Example Number One ........................... 5-10

Setting Example Number Two ........................... 5-11

Continued

SECTION 6 MAINTENANCE 6-1

General ................................................ 6-1

In-House Repair ......................................... 6-1

Storage ................................................ 6-1

SECTION 7 MANUAL CHANGE INFORMATION 7-1

iv BE1-87G - Introduction

SECTION 1 • GENERAL INFORMATION

DESCRIPTION

BE1-87G Variable Percentage Differential relays are single- or three-phase solid state devices designed to provide selective, high-speed, differential protection for generators, motors and shunt reactors.

Differential relaying selectivity is based on the ability of a relay to distinguish between an internal fault (within the protected zone) and an external fault. Under normal operating conditions the current into the protected zone equals the current out of the protected zone with a net operating current equal to zero. Internal faults upset this balance and result in a difference between the input and output currents. External faults have relatively little effect on the balance because the protected zone input current still equals the output current. Therefore, by comparing the currents on both sides of the protected element or zone and detecting when these currents are not equal, a differential relay acts to isol ate the element or zone from the system with unsurpassed effectiveness.

BE1-87G Variable Percentage Differential relays typically trip a lockout relay (86) which in turn trips the generator breaker and, when present, the field and/or neutral breakers.

APPLICATION

BE1-87G Variable Percentage Differential relays are recommended for the following specific applications when used with current transformers (CT) with an accuracy class of either C20 or better or T20 or better.

 Generators: any terminal voltage and a rating of 1000 kVA and above.  Generators: any kVA rating and a terminal voltage of 5 kV and above.  Generators: a terminal voltage of 2200 V or higher, and a rating of more than 500 kVA.  Motors: rated 1500 horsepower and above.  As primary protection on shunt reactors for transmission lines.  Generator ground differential

Differential relaying is the most selective form of faul t protection which may be applied to the individual elements or zones of ac power systems. Various types of differential relays and relaying systems have evolved to take advantage of the differential principle.

WARNING

Relays manufactured prior to July 22, 1991 (EIA date code symbol 9129 and previous)

NOT

do applies to three phase relays terminals 7 and 8, terminals 13 and 14, and terminals 17 and 18. Exercise connected to these terminals.

Typical application schemes are shown in Figures 1-1 and 1-2.

have case jumpers between terminals 7 and 8 (single phase units). This also

CAUTION

when grounding or testing current transformer circuits

BE1-87G - General Information 1-1

Figure 1-1. Typical Single-Phase Application Scheme

Figure 1-2. Typical Three-Phase Application Scheme

1-2 BE1-87G - General Information

Variable Restraint Characteristic

At high current levels, the inevitable difference in the saturation characteristics between current transformers indicates a need for a compensating decrease in relay sensitivity. The design of the BE1-87G provides a restraint factor that is proportional to input current when the restraining current (IR) is greater than nominal (five amperes for sensing input type one or one ampere for sensing input type two). The BE1-87G compares the protected zone sensed input and output currents. The lesser of the two sensed current levels becomes the restraining current. The difference between the two sensed currents (the operating current) is compared to a reference established by the sensitivity setting, and adjusted by an amount proportional to the restraining current. This makes the BE1-87G more sensitive to low current internal faults, and less sensitive to external faults with high levels of through current.

When the restraining current is at nominal (five amperes for sensing input type one or one ampere for sensing input type two) or less, the relay trips if the differential current exceeds the relay setting (I

). But

when the restraining current is greater than nominal, the overall sensitivity is a combination of the front panel setting and the restraint factor.

Design Highlights

Some of the many advantages of the solid-state BE1-87G Variable Percentage Differential Relay are summarized as follows.

 Seven sensitivity levels on each of the two sensing input ranges. The seven levels allow

compensation for CT mismatch and provide the flexibility and adaptability necessary for many special applications such as split winding generator protection.

 Stabilizing reactor. Minimizes dissimilar performance of system CTs. Reactor can be located on

the back of the relay or remotely from the BE1-87G for flexibility of system installation.

 Variable restraint. The variable restraint characteristic allows increased sensitivity to low current

internal faults while providing increased security against high levels of through current caused by external faults.

 Single- or three-phase availability. Either configuration is available in the Basler Electric S1 drawout

case.

 High-Speed Operation. The BE1-87G operates in 30 milliseconds for fault levels of 10 times the

sensitivity setting. This high-speed operation minimizes potential damage to the protected equipment. Response characteristics for sensing input ranges 1 and 2 are shown in Section 5,

Testing And Setting

the relay.

MODEL AND STYLE NUMBER

The electrical characteristics and operational features included in a specific relay are defined by a combination of letters and numbers which constitutes the device's style number. The style number together with the model number describe the features and options in a particular device and appear on the front panel, drawout cradle, and inside the case as sembly. The model number BE1-87G designates the relay as a Basler Electric Class 100, Variable Percentage Differential Relay.

Style Number Example

Figure 1-3 illustrates the style number identification chart with features and options for BE1-87G relays. For example, if the style number were BE1-87G GlE AlJ AOCOF the device would have the following:

BE1-87G - General Information 1-3

BE1-87G

Style Number Identification Chart

Figure 1-3 is the Style Number identification Chart for the BE1-87G Variable Percentage Differential relay.

Model Number

Three-phase sensing input

Sensing range switch selectable for 0.1, 0.15, 0.2, 0.4, 0.5, 0.8, or 1.6 A

Normally open output relay

Instantaneous timing

Operating power derived from 125 Vdc or 100/120 Vac

Internally operated targets (one per phase)

No option 1 available

Push-to-energize outputs (pushbuttons)

No auxiliary output contacts

Semi-flush mounting

Figure 1-3. Style Number Identification Chart

1-4 BE1-87G - General Information

SPECIFICATIONS

BE1-87G relays are available in single-phase and three-phase configurations, and with the following features and capabilities.

Current Sensing Inputs

(5 Ampere) Nominally rated at 5 amperes, with a range of 45 to 65 hertz. Maximum

current per input: 10 amperes continuous, 250 amperes for 1 second.

(1 Ampere) Nominally r ated at 1 ampere, with a range of 45 to 65 hertz. Maximum

current per input: 2 amperes continuous, 50 amperes for 1 second.

Current Sensing Burden

(5 Ampere) Burden is less than 0.05 ohms per input. (1 Ampere) Burden is less than 0.25 ohms per input.

Stabilizing Reactor

t Rating

(5 Ampere) 65 amperes for 1 second at 70( C ambient, (I (1 Ampere) 13 amperes for 1 second at 70( C ambient, (I

Pickup Control

Refer to Section 4 for stabilizing reactor impedance characteristic curves.

t=4225).

A front panel control permits minimum differential (operate) currents to be selected. This sensitivity is constant for restraint currents less than the nominal current (5 or 1 amperes). Actual operating characteristics are shown in graph format in Section 5,

Testing And Setting

the relay.

(5 Ampere) Minimum differential (operate) current = 0.1, 0.15, 0.2, 0.4, 0.5, 0.8, or 1.6

amperes. The ideal operating characteristic is approximated by the following equations.

where

is the restraint current, defined as the lesser of the input currents.

is the operate current

is the front panel setting

 5 amperes: IOP = I

For I

For IR > 5 amperes: IOP = IS + 0.5(IR - 5)

(1 Ampere) Minimum differential (operate) current = 0.02, 0.03, 0.04, 0.08, 0.10, 0.16,

or 0.32 ampere. The ideal operating characteristic is approximated by the following equations.

 1 ampere: IOP = I

For I

For IR > 1 ampere: IOP = IS + 0.5(IR - 1)

Pickup Accuracy

(5 Ampere) For I

 5 amperes, ±5% of the operate pickup characteristic or 25

milliamperes whichever is greater. Actual operating characteristics are shown in graph format in Section 5,

 5 amperes, up to a maximum of 20 amperes, ±8% of the operate

For I

Testing And Setting

the relay.

pickup characteristic or 150 milliamperes, whichever is greater. Actual operating characteristics for pickup values between 5 and 20 amperes are shown in graph format in Section 5,

BE1-87G - General Information 1-5

Testing And Setting

the relay.

Pickup Accuracy

(1 Ampere) For I

milliamperes whichever is greater. Actual operating characteristics are shown in graph format in Section 5,

For I pickup characteristic or 150 milliamperes, whichever is greater. Actual operating characteristics for pickup values between 1 and 4 amperes are shown in graph format in Section 5,

 1 ampere, ±5% of the operate pickup characteristic or 25

Testing And Setting

 1 amperes, up to a maximum of 4 amperes, ±8% of the operate

Testing And Setting

the relay.

Dropout

Timing

Power Supply

Greater than 90% of operate characteristic. Less than 30 milliseconds at 10 times pickup setting; 70 milliseconds

maximum. See Section 5,

Testing And Setting

the relay, for the pickup

response timing curve. Power for the internal circuitry may be derived from ac or dc external power

sources as indicated in Table 1-1.

Table 1-1. Power Supplies

Type

Nominal Input

Voltage

Input Voltage

Range

Burden at Nominal

(Maximum)

K (Mid Range) 48 Vdc 24 to 60 Vdc 5.0 W

J (Mid Range) 125 Vdc

120 Vac

L (Low Range)

24 Vdc 12 to 32 Vdc 5.5 W

Y (Mid Range) 48 Vdc

125 Vdc

Z (High Range) 250 Vdc

230 Vac

62 to 150 Vdc 90 to 132 Vac

24 to 60 Vdc

62 to 150 Vdc

140 to 280 Vdc 190 to 270 Vac

5.5 W

14.5 VA

5.5 W

6.0 W

7.0 W

20.0 VA

Type L power supplies may initially require 14 Vdc to begin operating. Once operating, the voltage may be reduced to 12 Vdc and operation will continue.

Output Contacts

Output contacts are rated as follows.

Resistive:

120/240 Vac Make and carry 30 amperes for 0.2 seconds, carry 7 amperes

continuously, and break 7 amperes.

125/250 Vdc Make and carry 30 amperes for 0.2 seconds, carry 7 amperes

continuously, and break 0.3 ampere.

Inductive:

120/240 Vac, Make and break 0.1 A (L/R = 0.04). 125/250 Vdc Make and break 0.1 A (L/R = 0.04).

Targets

Magnetically latched, manually reset target indicators may be optionally selected as either internally operated or current operated. Current operated targets require a minimum of 0.2 ampere through the output trip circuit and are rated at 30 amperes for 1 second, 7 amperes for 2 minutes, and 3 amperes continuously.

1-6 BE1-87G - General Information

Isolation

In accordance with ANSI/IEEE C37.90, one minute dielectric (high potential) tests as follows:

All circuits to ground: 2121 Vdc Input to output circuits: 1500 Vac or 2121 Vdc

Surge Withstand Capability

Fast Transient

Impulse Test

Radio Frequency

Interference (RFI)

Temperature

Shock

Vibration

Weight

Qualified to ANSI/IEEE C37.90.1-1989

Capability (SWC) Tests for Protective Relays and Relay Systems

Qualified to ANSI/IEEE C37.90.1-1989. Qualified to IEC 255-5. Maintains proper operation when tested for interference in accordance

with IEEE C37.90.2, Trial-Use Standard Withstand Capability of Relay systems to Radiated Electromagnetic Interference from Transceivers.

Operating Range

-40(C (-40(F) to 70(C (158(F) Recommended Storage Range

-65(C (-85(F) to 100(C (212(F). 15 g in each of three mutually perpendicular planes. 2 g in each of three mutually perpendicular planes swept over the range

of 10 to 500 hertz for a total of six sweeps, 15 minutes each sweep. 3-phase: 19.2 pounds maximum.

1-phase: 14.3 pounds maximum.

Standard Surge Withstand

Case Size

All units are supplied in an S1 size case.

BE1-87G - General Information 1-7

+ 28 hidden pages