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TRENDnet BE1-87G - page 1
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TRENDnet BE1-87G - page 2
BE1-87G - Introduction i 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. INTRODUCTION This manual provides information concerning the operation and installation of the BE1-87G Variable Percentage Differential Relay. To accomplish this, the following is pr ...
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TRENDnet BE1-87G - page 3
ii BE1-87G - Introduction 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. First Printing: December 1985 Printed in USA © 1995, 1996, 199 ...
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TRENDnet BE1-87G - page 4
BE1-87G - Introduction iii 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 Numb ...
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TRENDnet BE1-87G - page 5
iv BE1-87G - Introduction CONTENTS - Continued SECTION 5 TESTING AND SETTING - Continued 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 ............................... ...
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TRENDnet BE1-87G - page 6
BE1-87G - General Information 1-1 WARNING Relays manufactured prior to July 22, 1991 (EIA date code symbol 9129 and previous) do NOT have case jumpers between terminals 7 and 8 (single phase units). This also applies to three phase relays terminals 7 and 8, terminals 13 and 14, and terminals 17 and 18. Exercise CAUTION when grounding or testing c u ...
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TRENDnet BE1-87G - page 7
1-2 BE1-87G - General Information Figure 1-1. Typical Single-Phase Application Scheme Figure 1-2. Typical Three-Phase Application Scheme ...
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TRENDnet BE1-87G - page 8
BE1-87G - General Information 1-3 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 r ...
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TRENDnet BE1-87G - page 9
1-4 BE1-87G - General Information BE1-87G Model Number G Three-phase sensing input 1 Sensing range switch selectable for 0.1, 0.15, 0.2, 0.4, 0.5, 0.8, or 1.6 A E Normally open output relay A1 Instantaneous timing J Operating power derived from 125 Vdc or 100/120 Vac A Internally operated targets (one per phase) 0 No option 1 available C Push-to-en ...
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TRENDnet BE1-87G - page 10
BE1-87G - General Information 1-5 SPECIFICATIONS BE1-87G relays are available in single-phase and three-phase configurations, and with the following fea tures 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. ( ...
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TRENDnet BE1-87G - page 11
1-6 BE1-87G - General Information Pickup Accuracy (1 Ampere) For I R 1 amp ere, ±5% of the operate pickup characteristic or 25 milliamperes whichever is greater. Actual operating characteristics are shown in graph format in Section 5, Testing And Setting the relay. For I R 1 amperes, up to a maximum of 4 amperes, ±8% of the operate pickup ...
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TRENDnet BE1-87G - page 12
BE1-87G - General Information 1-7 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 Qualified to ANSI/IEEE C37.90.1-1989 Standard Surge Withstand Capability (SWC) Tests for Protective Relay ...
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TRENDnet BE1-87G - page 13
BE1-87G - Human Machine Interface (Controls And Indicators) 2-1 SECTION 2 • HUMAN MACHINE INTERFACE (Controls And Indicators) DESCRIPTION Table 2-1 lists and briefly describes the BE1-87G Variable Percentage Differential Relay operator controls and indicators. Reference the call-out letters to Figure 2-1. Table 2-1. BE1-87G Controls and Indicator ...
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TRENDnet BE1-87G - page 14
BE1-87G - Functional Description 3-1 SECTION 3 • FUNCTIONAL DESCRIPTION GENERAL BE1-87G Variable Percentage Differential Relays are static devices that protect motors and generators by providing an output signal when incoming current does not match outgoing curre nt b y a predetermined but variable limit. The functional block diagram in Figure 3- ...
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TRENDnet BE1-87G - page 15
3-2 BE1-87G - Functional Description 0 5 10 15 20 25 30 35 0123456789 1 0 CURRENT ( AMP S ) VOLTAGE(VOLTS) 0 5 10 15 20 25 30 0 0.2 0.4 0.6 0. 8 1 1.2 1.4 1.6 1. 8 2 CURRENT ( AMP S ) VOLTAGE(VOLTS) and one ampere nominal), one transformer on each side of the protected machine, supply sensing current for each monitored phase. The sensing currents a ...
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TRENDnet BE1-87G - page 16
BE1-87G - Functional Description 3-3 Figure 3-3. Sensing Input Range 2 (1 Ampere),Stabilizing Reactor Impedance Characteristics Bandpass Filters Outputs from the relay transformers are filtered to eliminate the third harmonic and to minimize the effect of DC offset caused by CT saturation (as may occur during synchronization or asymmetrical faults) ...
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TRENDnet BE1-87G - page 17
3-4 BE1-87G - Functional Description supply status output relay continually energized and its output contacts open. If the power supply output voltage falls below the requirements for proper operation, the power supply status output relay de-energizes, closing the NC output contacts. Power Supply Basler Electric enhanced the power supply design for ...
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TRENDnet BE1-87G - page 18
BE1-87B - Installation 4-1 Figure 4-1. S1 Case, Outline Dimensions, Front View SECTION 4 • INSTALLATION GENERAL When not shipped as part of a control or switchgear panel, the relays are shipped in sturdy cartons to prevent damage during transit. Immediately upon rec eipt of a relay, check the model and style number against the requisition and pac ...
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TRENDnet BE1-87G - page 19
4-2 BE1-87B - Installation Figure 4-2. S1 Case, Double-Ended, Outline Dimensions, Semi-Flush Mounting, Side View Figure 4-3. S1 Case, Double-Ended, Outline Dimensions, Projection Mounting, Side View ...
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TRENDnet BE1-87G - page 20
BE1-87B - Installation 4-3 Figure 4-4. S1 Case, Double-Ended, Panel Drilling Diagram, Semi-Flush Mounting Figure 4-5. S1 Case, Double-Ended, Panel Drilling Diagram, Projection Mounting, Rear View ...
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TRENDnet BE1-87G - page 21
4-4 BE1-87B - Installation Stabilizing Reactor The stabilizing reactor for a three-phase relay is mounted on the rear of the relay. For projection mounting or convenience, the stabilizing reactor can be removed and relocated. R ewir e in accordance with the procedures and illustrations in this section. To remove the stabilizing reactor, remove four ...
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TRENDnet BE1-87G - page 22
BE1-87B - Installation 4-5 WARNING Relays manufactured prior to July 22, 1991 (EIA date code symbol 9129 and previous) do NOT have case jumpers between terminals 7 and 8 (single phase units). This also applies to three phase relays terminals 7 and 8, terminals 13 and 14, and terminals 17 and 18. Exercise CAUTION when grounding or testing c urre nt ...
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TRENDnet BE1-87G - page 23
4-6 BE1-87B - Installation Figure 4-8. Typical DC Control Connections Figure 4-9. Single-Phase Sensing Input Connections ...
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TRENDnet BE1-87G - page 24
BE1-87B - Installation 4-7 Figure 4-10. Three-Phase Sensing Input Connection ...
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TRENDnet BE1-87G - page 25
4-8 BE1-87B - Installation Figure 4-11. Single-Phase Internal Connection Diagram ...
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TRENDnet BE1-87G - page 26
BE1-87B - Installation 4-9 Figure 4-12. Three-Phase Internal Connection Diagram ...
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TRENDnet BE1-87G - page 27
BE1-87G - Testing And Setting 5-1 CAUTION To avoid false tripping on three phase units, upper connection plug must be in place prior to inserting or removing lower connection plug. SECTION 5 • TESTING AND SETTING GENERAL Proper operation of the relay may be confirmed by performing the operational test procedures in this Section. In the event the ...
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TRENDnet BE1-87G - page 28
5-2 BE1-87G - Testing And Setting WARNING During testing, do NOT apply or generate continuous operate current greater than three amperes. If the operate current is greater than three amperes, a temperature increase in the reactor may result and cause insulation breakdown. NOTE Because of the reactance of the stabilizing reactors, the burden may be ...
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TRENDnet BE1-87G - page 29
BE1-87G - Testing And Setting 5-3 Figure 5-2. Location of Assemblies (Single Phase Only) NON-COMPONENT SIDE OF LOWER MAGNETICS/SHIELD BOARD Figure 5-3. TP-1 and TP-2 on Single Phase Relays ...
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TRENDnet BE1-87G - page 30
5-4 BE1-87G - Testing And Setting NOTE Output contacts may be NC or NO, depending on st yle of relay. Check continuity at terminals 1 and 10 with relay tripped and not tripped to assure correct response for the type of contacts specified. Single-Phase Trip And Dropout Test Step 1. Connect the test setup for phase A in accordance with Figure 5-1. St ...
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TRENDnet BE1-87G - page 31
BE1-87G - Testing And Setting 5-5 Figure 5-4. Sensing Input Range 1, Operating Characteristics ...
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TRENDnet BE1-87G - page 32
5-6 BE1-87G - Testing And Setting Figure 5-5. Sensing Input Range 2, Operating Characteristics ...
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TRENDnet BE1-87G - page 33
BE1-87G - Testing And Setting 5-7 RESTRAINT CURRENT ( AMPERES ) RESTRAINT CURRENT (AMPERES) 0 2 4 8 6 10 12 14 16 18 20 0 5 1 0 1 52 02 53 0 3 54 0 0 1 234 56 78 D2354-14 04-30-96 Ran g e 1 Ran g e 2 15 20 25 30 35 40 45 0 1 02 03 04 05 06 07 08 09 0 MULTIPLES OF PICKUP RESPONSE TIME (MSEC) Figure 5-6. Extended Restraint Operating Characteristic Fi ...
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TRENDnet BE1-87G - page 34
BE1-87G - Testing And Setting 5-9 NOTE Sensing Input Range 1: If R w is unknown, assume R w = 0.003 * N a Sensing Input Range 2: If R w is unknown, assume R w = 0.01 * N a Terms for Calculations I" d Subtransient current N Total number of CT turns N a Number of CT turns in use (for multi-ratio type) R l One-way lead resistance, in ohms R r Rel ...
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TRENDnet BE1-87G - page 35
5-8 BE1-87G - Testing And Setting NOTE If option B (current operated) targets are specified, the target is only operable when a minimum of 0.2 ampere is present in the output circuit (terminals 1 and 10). Phases B And C, Trip And Dropout Test Step 1. If the relay is a 3-phase relay, repeat steps 1 through 7 for phases B and C. Target Test If relay ...
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TRENDnet BE1-87G - page 36
5-10 BE1-87G - Testing And Setting Table 5-1. Recommended Pickup Settings Vce (Lower Value) SFR 1 1.5 2 3 4 20 0.2 0.4 0.5 0.8 1.6 50 0.2 0.4 0.4 0.5 0.8 100 0.2 0.2 0.4 0.4 0.5 200 0.1 0.1 0.2 0.4 0.5 >200 0.1 0.1 0.2 0.4 0.5 Note: Use next higher setting if CTs are a mix of C classification and T classification. The saturation factor ratio, SF ...
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TRENDnet BE1-87G - page 37
BE1-87G - Testing And Setting 5-11 I d 1000 4.16× 3 0.15×200 138.8 30 4.6 × CT rating Inequality (1) is met with CT #2, but not with CT #1. However, since the locked rotor current is only 4.8 times CT rating [vs. the assumption of 20 times rated for inequality (1) ], the application is suitable. SFR = (100/50)*(0.36/0.19) = 3. ...
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TRENDnet BE1-87G - page 38
5-12 BE1-87G - Testing And Setting Inequality (1) is met with CT #2, but not with CT #1. However, since the maximum external fault current is only 4.6 times CT rating [vs. the assumption of 20 times rated for inequality (1) ], the application is suitable. SFR = (100/50)*(0.36/0.19) = 3.8 Using the SFR 4 column of Table 5-1, a 0.8 ampere setting is ...
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TRENDnet BE1-87G - page 39
BE1-87G - Maintenance 6-1 CAUTION Substitution of printed circuit boards or individual components does not necessarily mean the relay will operate properly. Always test the relay before placing it in operation. SECTION 6 • MAINTENANCE GENERAL BE1-87G Variable Percentage Differential Relays require no preventiv e m aintenance other than a periodic ...
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TRENDnet BE1-87G - page 40
BE1-87G - Manual Change Information 7-1 SECTION 7 • MANUAL CHANGE INFORMATION SUMMARY AND CROSS REFERENCE GUIDE This section contains information concerning the previous editions of the manual. The substantive changes to date are summarized in Table 7-1. Table 7-1. BE1-87G Changes Revision Summary Of Changes ECA/ECO/Date A Added qualifications to ...
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