Basler Electric BE1-50/51B-235 User Manual

INSTRUCTION MANUAL

FOR

OVERCURRENT RELAYS

BE1-50/51B-235 and BE1-50/51B-236

Publication: 9252000898

Revision: B 03/11

INTRODUCTION

This instruction manual provides information about the operation and installation of the BE1-50/51B-235
and BE1-50/51B-236 Overcurrent Relays. To accomplish this, the following information is provided:

 General Information and Specifications
 Controls and Indicators
 Functional Description
 Installation and Maintenance
 Testing

WARNING!

To avoid personal injury or equipment damage, only qualified personnel should
perform the procedures in this manual.

9252000898 Rev B BE1-50/51B-235/-236 Introduction i

First Printing: April 2008

Printed in USA

© 2008-2011 Basler Electric, Highland Illinois 62249 USA

All Rights Reserved

March 2011

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 BE1-50/51B-235/-236 Introduction 9252000898 Rev B

REVISION HISTORY

The following information provides a historical summary of the changes made to this instruction manual
(9252000898). Revisions are listed in reverse chronological order.

Manual

Revision and Date

B, 03/11

A, 01/09

—, 04/08

 Changed all references of ABB to Westinghouse.
 Added the year of the IEEE listings in Section 1.
 Removed references to case and connection plugs since these items

are not supplied by Basler Electric.

 Removed notes about hard-wiring relay case to ground since relay is

a direct replacement, i.e. not shipped with a case.

 Added GOST-R Certification in Section 1.
 Corrected terminal numbering in Figure 4-1, Typical AC Connections.
 Updated Storage statement in Section 4.
 Modified Figures 5-3 and 5-6, Target Indicator Test Setup.
 Minor text edits in Section 5.

 Initial release

Change

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iv BE1-50/51B-235/-236 Introduction 9252000898 Rev B

CONTENTS

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

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

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

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

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

APPENDIX A • CHARACTERISTIC CURVES ......................................................................................... A-1

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vi BE1-50/51B-235/-236 Introduction 9252000898 Rev B

SECTION 1 • GENERAL INFORMATION

TABLE OF CONTENTS

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

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

FEATURES ............................................................................................................................................ 1-1

Advantages......................................................................................................................................... 1-2

SPECIFICATIONS ................................................................................................................................. 1-2

Time Overcurrent (51) Element .......................................................................................................... 1-2

Instantaneous Overcurrent A (50-A) Element .................................................................................... 1-3

Instantaneous Overcurrent B (50-B) Element .................................................................................... 1-3

Current Sensing Input ........................................................................................................................ 1-3

Frequency Response ......................................................................................................................... 1-5

Transient Response ........................................................................................................................... 1-5

Harmonic Rejection ............................................................................................................................ 1-6

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

Output Contacts ................................................................................................................................. 1-6

Type Tests .......................................................................................................................................... 1-7

Environment ....................................................................................................................................... 1-7

Agency Recognition ........................................................................................................................... 1-7

Physical .............................................................................................................................................. 1-7

Figures

Figure 1-1. Current Sensing Input Derating Curve (BE1-50/51B-235)
Figure 1-2. Current Sensing Input Derating Curve (BE1-50/51B-236)
Figure 1-3. Current Sensing Input Burden (BE1-50/51B-235)
Figure 1-4. Current Sensing Input Burden (BE1-50/51B-236)
Figure 1-5. Harmonic Rejection

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

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

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

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

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

Tables

Table 1-1. ABB Relays Suitable for Direct Replacement

.......................................................................... 1-1

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ii BE1-50/51B-235/-236 General Information 9252000898 Rev B

SECTION 1 • GENERAL INFORMATION

INTRODUCTION

BE1-50/51B-235 and BE1-50/51B-236 protective relays are direct replacements for Westinghouse type
CO relays. The BE1-50/51B-235 has a 5-ampere current sensing input. The BE1-50/51B-236 has a
1-ampere current sensing input. Compatible Westinghouse model numbers are listed in Table 1-1.

Table 1-1. Westinghouse Relays Suitable for Direct Replacement

Catalog Number Curve Type

CO-2∗11∗1N

CO-5∗11∗1N

CO-6∗11∗1N

CO-7∗11∗1N

CO-8∗11∗1N

CO-9∗11∗1N

CO-11∗11∗1N

∗ Any digit covering all pickup ranges except 50 Hz models.

To replace an existing Westinghouse type CO, perform the following steps.

1. Select the desired relay settings on your new BE1-50/51B-235 or BE1-50/51B-236 relay.

2. Remove the existing ABB relay cradle.

3. Insert the new relay cradle.

4. Close the knife-blade switches.

5. Install the new Basler Electric cover and secure with the captive thumbnut.

BE1-50/51B-235 and BE1-50/51B-236 relays are self-powered, compatible with 50 or 60 Hz power
systems, and have three protection elements: one time overcurrent (51) element and two instantaneous
overcurrent (50) elements. The 51 element offers timing characteristic curves similar to those used by GE
IAC relays.

Short Time

Long Time

Definite

Moderately Inverse

Inverse

Very Inverse

Extremely Inverse

FEATURES

A wide range of pickup settings and front panel selectable time characteristics permit applications
involving coordination with fuses, reclosers, cold load pickup, motor starting, and fixed time requirements.
In addition, an integrating reset function is available to simulate the disk reset of electromechanical relays.

BE1-50/51B-235 and BE1-50/51B-236 overcurrent relays have the following standard features.

• Independent time and instantaneous elements

• A secure method to manually trip the breaker at the relay front panel

• Direct reading front panel controls

• Minimum pickup setting for safety during installation

• Time characteristics extend to a pickup multiple of 40

• Rugged draw-out construction

• Gravity latching targets retain indication without power

• Built-in accuracy eliminates internal adjustments

• Minimum transient overreach

• Field selectable characteristic curve selection similar to either GE IAC or Westinghouse CO type

curves

• Field selectable instantaneous or integrating reset

• Field selectable 50 or 60 Hz operation

• Field selectable 0.0 or 0.1 second, fixed, instantaneous delay

Internal switches provide for selecting system-operating frequencies of 50 or 60 Hz, instantaneous
element delays of 0.0 or 0.1 second, characteristic curve group selection for either GE IAC or
Westinghouse CO type curves, and instantaneous or integrating reset characteristics. Switch location and
description is provided in Section 2.

9252000898 Rev B BE1-50/51B-235/-236 General Information 1-1

Advantages

BE1-50/51B-235 and BE1-50/51B-236 overcurrent relays have many advantages over other overcurrent
relays. The primary advantages are:

• Time characteristics are defined by equations and graphs

• Field selectable time characteristics

• Very low burden extends the linear range of the CTs

• Self powered from the sensed current

• Continuous automatic calibration

BE1-50/51B-235 and BE1-50/51B-236 overcurrent relays may be tested without removing the relay from
the case. Shorting contacts are provided for all current inputs when the relay chassis is removed from the
relay case.

SPECIFICATIONS

BE1-50/51B-235 and BE1-50/51B-236 electrical and physical specifications are listed in the following
paragraphs.

Time Overcurrent (51) Element

BE1-50/51B-235 Pickup

Setting Range: 0.5 to 15.9 Aac
Setting Increment: 0.1 Aac
Accuracy: Sum of ±2% and ±25 mAac

BE1-50/51B-236 Pickup

Setting Range: 0.1 to 3.18 Aac
Setting Increment: 0.02 Aac
Accuracy: Sum of ±2% and ±5 mAac

Dropout

Dropout occurs at 95% of pickup value.

Characteristic Curves

Available curve types follow IEEE Standard C37.112 (1996) and emulate standard GE IAC,
Westinghouse CO, and BS142 curves. Appendix A, Characteristic Curves illustrates the available curves
and lists the applicable constants.

Curve Types: Short Inverse, Long Inverse, Definite Time, Moderately Inverse, Inverse,

Very Inverse, Extremely Inverse, BS142 Very Inverse, BS142 Extremely

Inverse, Fixed Time
Time Multiplier: 11 curves for each characteristic
Timing Accuracy: ±1 cycle, ±2%. This accuracy applies to the range of 1.3 to 40 times tap

and is for a given measured multiple of tap.

Fixed Timing

Setting Range: 0.1 to 9.9 s
Setting Increment: 0.1 s
Timing Accuracy: ±1 cycle, ±2% of the time to trip for time dial settings ≥0.1.

Reset

Integrating: Simulates the disk reset of electromechanical relays and begins when

the current decreases below 95% of pickup. Appendix A, Characteristic

Curves illustrates the integrating reset characteristic curve and equation.
Instantaneous: Reset occurs within 16 ms of when the current decreases below 95% of

the pickup level.

1-2 BE1-50/51B-235/-236 General Information 9252000898 Rev B

Instantaneous Overcurrent A (50-A) Element

BE1-50/51B-235 Pickup

Setting Range: 2 to 99 Aac
Setting increment: 1 Aac
Accuracy: Sum of ±2% and ±25 mAac

BE1-50/51B-236 Pickup

Setting Range: 0.4 to 19.8 Aac
Setting increment: 0.2 Aac
Accuracy: Sum of ±2% and ±5 mAac

Dropout

Dropout occurs at 95% of pickup value.

Time Delay

Switch selectable—no intentional delay (SW3-2 OFF) or a fixed delay of 100 ms (SW3-2 ON). Appendix
A, Characteristic Curves illustrates the characteristic curve for the 50-A and 50-B elements.

Instantaneous Overcurrent B (50-B) Element

BE1-50/51B-235 Pickup

Setting Range: 1 to 15.9 Aac
Setting increment: 0.1 Aac
Accuracy: Sum of ±2% and ±25 mAac

BE1-50/51B-236 Pickup

Setting Range: 0.2 to 3.18 Aac
Setting increment: 0.02 Aac
Accuracy: Sum of ±2% and ±5 mAac

Dropout

Dropout occurs at 95% of pickup value.

Time Delay

Fixed at no intentional delay. Appendix A, Characteristic Curves illustrates the characteristic curve for the
50-A and 50-B elements.

Reset Characteristic

Resets within 16 ms of when sensed current decreases below the pickup level.

Current Sensing Input

BE1-50/51B-235

Continuous Rating: 14 Aac∗
1 Second Rating: 400 Aac
∗ Continuous rating is 14 Aac for temperatures up to 45°C. See Figure 1-1 for derating curve.

9252000898 Rev B BE1-50/51B-235/-236 General Information 1-3

Figure 1-1. Current Sensing Input Derating Curve (BE1-50/51B-235)

Continuous Current

Current Sensing Input

0

2

4

6

8

10

12

14

16

-40 -20 0 20 40 60

Current (Aac)

Continuous Current

Current Sensing Input

0

0.4

0.8

1.2

1.6

2

2.4

2.8

3.2

-40 -20 0 20 40 60

Ambient Temperature (C)

Current (Aac)

BE1-50/51B-236

Continuous Rating: 2.8 Aac∗
1 Second Rating: 80 Aac
∗ Continuous rating is 2.8 Aac for temperatures up to 45°C. See Figure 1-2 for derating curve.

BE1-50/51B-235 Burden

Figure 1-3

illustrates the current sensing input burden characteristic.

At 0.5 Aac: 2.8 Ω
At 5.0 Aac: 0.3 Ω

1-4 BE1-50/51B-235/-236 General Information 9252000898 Rev B

Figure 1-2. Current Sensing Input Derating Curve (BE1-50/51B-236)

Figure 1-3. Current Sensing Input Burden (BE1-50/51B-235)

BE1-50/51B-230 CT Burden

0

20

40

60

80

100

120

140

160

0 10 20 30 40 50

Input Current (Amps)

Burden in VA (rms)

BE1-50/51B-234 CT Burden

0

20

40

60

80

100

120

140

0 2 4 6 8 10

Input Current (Amps)

Burden in VA (rms)

BE1-50/51B-235 CT Burden

BE1-50/51B-236 CT Burden

BE1-50/51B-236 Burden

Figure 1-4

illustrates the current sensing input burden characteristic.

At 0.1 Aac: 57.0 Ω
At 1.0 Aac: 6.9 Ω

Frequency Response

A change of ±5 Hz from the nominal 50/60 Hz current causes <0.5% change in the current required for
pickup.

Transient Response

<10% overreach with system time constants up to 40 ms.

9252000898 Rev B BE1-50/51B-235/-236 General Information 1-5

Figure 1-4. Current Sensing Input Burden (BE1-50/51B-236)

Harmonic Rejection

Rejection of odd and even harmonics is illustrated in Figure 1-5.

Figure 1-5. Harmonic Rejection

Target Indicators

A gravity-latched, manually-reset, current-operated target indicator is provided for the time-overcurrent
(51) trip output and the instantaneous overcurrent A (50-A) trip output. A target indicator is not provided
for the 50-B trip output. The level of trip circuit current required to operate each target is individually
controlled by a circuit board jumper. See Section 2, Controls and Indicators for jumper locations and
function assignments

Minimum Operating Current

Jumper Position—Pins 1 and 2: 0.9 to 2.25 A ∗
Jumper Position—Pins 2 and 3: 80 mA to 200 mA ∗

∗ Minimum operating current values. See Output Contacts for the maximum acceptable levels of

trip circuit currents.

Output Contacts

Output contacts are surge protected and rated as follows.

Resistive Ratings

120/240 Vac: Make 30 amperes for 0.2 seconds, carry 7 amperes for 2 minutes, 3

125/250 Vdc: Make 30 amperes for 0.2 seconds, carry 7 amperes for 2 minutes, 3

amperes continuously, and break 5 amperes.

amperes continuously, and break 0.3 ampere.

Inductive Ratings

120/240 Vac, 125/250 Vdc: Make and carry 30 amperes for 0.2 seconds, carry 7 amperes for 2

minutes, 3 amperes continuously, and break 0.3 ampere. (L/R = 0.04).

Terminal Assignments

51 Element: 1, 10
50-A Element: 1, 10
50-B Element: 2, 10

1-6 BE1-50/51B-235/-236 General Information 9252000898 Rev B

Type Tests

Isolation: IEEE C37.90 - 2005
Transient Surge: IEEE C37.90.1 - 2002
Radiated Interference: IEEE C37.90.2 - 2004
Electrostatic Discharge: IEEE C37.90.3 - 2001
Vibration: IEC 255-21-1
Shock and Bump: IEC 255-21-2

Environment

Operating Temperature: –40 to 70°C (–40 to 158°F)
Storage Temperature: –50 to 70°C (–58 to 158°F)

Agency Recognition

GOST-R Certification

GOST-R certified per the relevant standards of Gosstandart of Russia.

Physical

Weight: 6.1 lb (2.77 kg)

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SECTION 2 • CONTROLS AND INDICATORS

TABLE OF CONTENTS

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

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

FRONT PANEL CONTROLS AND INDICATORS ................................................................................. 2-1

CIRCUIT BOARD CONTROLS .............................................................................................................. 2-3

Figures

Figure 2-1. Front Panel Controls and Indicators
Figure 2-2. Circuit Board Controls

Tables

Table 2-1. Front Panel Controls and Indicators
Table 2-2. Circuit Board Controls

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

............................................................................................................. 2-3

......................................................................................... 2-2

.............................................................................................................. 2-4

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ii BE1-50/51B-235/-236 Controls and Indicators 9252000898 Rev B

SECTION 2 • CONTROLS AND INDICATORS

A

B

C

DE

F

G

H

I

P0055-19

INTRODUCTION

BE1-50/51B-235 and BE1-50/51B-236 relay controls and indicators are located on the front panel and
circuit board.

FRONT PANEL CONTROLS AND INDICATORS

Front panel controls and indicators are illustrated in Figure 2-1 and described in Table 2-1. The locators
and descriptions of Table 2-1 correspond to the locators shown in Figure 2-1.

Figure 2-1. Front Panel Controls and Indicators

9252000898 Rev B BE1-50/51B-235/-236 Controls and Indicators 2-1