Basler Electric BE1-50/51B-237 User Manual

INSTRUCTION MANUAL

FOR

OVERCURRENT RELAYS

BE1-50/51B-237 and BE1-50/51B-238

Publication: 9252000899

Revision: B 12/11

INTRODUCTION

This instruction manual provides information about the operation and installation of the BE1-50/51B-237
and BE1-50/51B-238 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.

9252000899 Rev B BE1-50/51B-237/-238 Introduction i

First Printing: April 2008

Printed in USA

© 2008-2011 Basler Electric, Highland Illinois 62249 USA

All Rights Reserved

December 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-237/-238 Introduction 9252000899 Rev B

REVISION HISTORY

The following information provides a historical summary of the changes made to this instruction manual
(9252000899). Revisions are listed in reverse chronological order.

Manual

Revision and Date

B, 12/11

A, 01/09

—, 04/08

 Made changes to reflect that a new connection plug is included with

 Updated year of IEEE C37.90 specifications in Section 1.
 Improved description of Locator B (Active/Pickup LED) in Table 2-1.

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

 Added GOST-R Certification in Section 1.
 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

the relay.

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

Change

9252000899 Rev B BE1-50/51B-237/-238 Introduction iii

iv BE1-50/51B-237/-238 Introduction 9252000899 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-237/-238 Introduction 9252000899 Rev B

SECTION 1 • GENERAL INFORMATION

TABLE OF CONTENTS

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

Introduction ............................................................................................................................................ 1-1

Features ................................................................................................................................................. 1-1

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

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

Instantaneous Overcurrent A (50-A) Element .................................................................................... 1-2

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

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

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

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

Harmonic Rejection ............................................................................................................................ 1-5

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

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

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

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

GOST-R Certification ......................................................................................................................... 1-7

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

Figures

Figure 1-1. Current Sensing Input Derating Curve (BE1-50/51B-237) ...................................................... 1-3

Figure 1-2. Current Sensing Input Derating Curve (BE1-50/51B-238)
Figure 1-3. Current Sensing Input Burden (BE1-50/51B-237)
Figure 1-4. Current Sensing Input Burden (BE1-50/51B-238)
Figure 1-5. Harmonic Rejection

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

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

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

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

Tables

Table 1-1. GE IAC Relays Suitable For Direct Replacement .................................................................... 1-1

9252000899 Rev B BE1-50/51B-237/-238 General Information i

ii BE1-50/51B-237/-238 General Information 9252000899 Rev B

SECTION 1 • GENERAL INFORMATION

Introduction

BE1-50/51B-237 and BE1-50/51B-238 protective relays are direct replacements for General Electric, IAC
relays. The BE1-50/51B-237 has a 5-ampere current sensing input. The BE1-50/51B-238 has a 1-ampere
current sensing input. Compatible IAC model numbers are listed in Table 1-1.

Table 1-1. GE IAC Relays Suitable For Direct Replacement

IAC Model Number Curve Type

12IAC51A∗∗∗A

12IAC51B∗∗∗A

12IAC53A∗∗∗A

12IAC53B∗∗∗A

12IAC55A∗∗∗A

12IAC55B∗∗∗A

12IAC66A∗∗A

12IAC66B∗∗A

12IAC77A∗∗∗A

12IAC77B∗∗∗A

∗ Any digit covering all pickup ranges and 50 Hz or 60 Hz models.

Inverse

Inverse with Instantaneous

Very Inverse

Very Inverse with Instantaneous

Short Time

Short Time with Instantaneous

Long Time

Long Time with Instantaneous

Extremely Inverse

Extremely Inverse with Instantaneous

To replace an existing IAC relay, perform the following steps.

1. Select the desired relay settings on your new BE1-50/51B-237 or BE1-50/51B-238 relay.

2. Remove the existing IAC relay.

3. Attach the cover adapter to the existing case.

4. Insert the new relay.

5. Install the new Basler Electric connection plug.

6. Install the new Basler Electric cover.

BE1-50/51B-237 and BE1-50/51B-238 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 and ABB relays.

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-237 and BE1-50/51B-238 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 with steel case

• 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 ABB 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

9252000899 Rev B BE1-50/51B-237/-238 General Information 1-1

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 ABB type
curves, and instantaneous or integrating reset characteristics. Switch location and description is provided
in Section 2.

Specifications

BE1-50/51B-237 and BE1-50/51B-238 electrical and physical specifications are listed in the following
paragraphs.

Time Overcurrent (51) Element

BE1-50/51B-237 Pickup

Setting Range ............................ 0.5 to 15.9 Aac

Setting Increment ....................... 0.1 Aac

Accuracy .................................... Sum of ±2% and ±25 mAac

BE1-50/51B-238 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, ABB 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.

Instantaneous Overcurrent A (50-A) Element

BE1-50/51B-237 Pickup

Setting Range ............................ 2 to 99 Aac

Setting increment ....................... 1 Aac

Accuracy .................................... Sum of ±2% and ±25 mAac

BE1-50/51B-238 Pickup

Setting Range ............................ 0.4 to 19.8 Aac

Setting increment ....................... 0.2 Aac

Accuracy .................................... Sum of ±2% and ±5 mAac

1-2 BE1-50/51B-237/-238 General Information 9252000899 Rev B

Dropout

Continuous Current

Current Sensing Input

0

2

4

6

8

10

12

14

16

-40 -20 0 20 40 60

Ambient Temperature (C)

Current (Aac)

Dropout occurs at 95% of pickup value.

Time Delay

Switch selectable—no intentional delay (SW3-2 open/off) or a fixed delay of 100 ms (SW3-2 closed/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-237 Pickup

Setting Range ............................ 1 to 15.9 Aac

Setting increment ....................... 0.1 Aac

Accuracy .................................... Sum of ±2% and ±25 mAac

BE1-50/51B-238 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-237

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.

Figure 1-1. Current Sensing Input Derating Curve (BE1-50/51B-237)

9252000899 Rev B BE1-50/51B-237/-238 General Information 1-3

BE1-50/51B-238

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-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-237 CT Burden

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.

Figure 1-2. Current Sensing Input Derating Curve (BE1-50/51B-238)

BE1-50/51B-237 Burden

Figure 1-3

At 0.5 Aac .................................. 2.8 Ω

At 5.0 Aac .................................. 0.3 Ω

1-4 BE1-50/51B-237/-238 General Information 9252000899 Rev B

illustrates the current sensing input burden characteristic.

Figure 1-3. Current Sensing Input Burden (BE1-50/51B-237)

BE1-50/51B-238 Burden

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-238 CT Burden

Figure 1-4

At 0.1 Aac .................................. 57.0 Ω

At 1.0 Aac .................................. 6.9 Ω

illustrates the current sensing input burden characteristic.

Figure 1-4. Current Sensing Input Burden (BE1-50/51B-238)

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.

Harmonic Rejection

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

9252000899 Rev B BE1-50/51B-237/-238 General Information 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

amperes continuously, and break 5 amperes.

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

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, 2

50-A Element ............................. 1, 2

50-B Element ............................. 1, 3

1-6 BE1-50/51B-237/-238 General Information 9252000899 Rev B

Type Tests

Isolation ..................................... IEEE C37.90-2005

Transient Surge ......................... IEEE C37.90.1-2004

Radiated Interference ................ IEEE C37.90.2-2004

Electrostatic Discharge .............. IEEE C37.90.3-2006

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)

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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1-8 BE1-50/51B-237/-238 General Information 9252000899 Rev B

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

Figure 2-2. Circuit Board Controls
Figure 2-3. View of 50-B Pickup Selector Switches (BE1-50/51B-237)
Figure 2-4. View of 50-B Pickup Selector Switches (BE1-50/51B-238)

Tables

Table 3-1. Front Panel Controls and Indicators ......................................................................................... 2-2

Table 3-2. Circuit Board Controls

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

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

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

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

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ii BE1-50/51B-237/-238 Controls and Indicators 9252000899 Rev B

SECTION 2 • CONTROLS AND INDICATORS

Introduction

BE1-50/51B-237 and BE1-50/51B-238 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

9252000899 Rev B BE1-50/51B-237/-238 Controls and Indicators 2-1