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GE DIAC 66K, Instruction Manual

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GE Power Management

DIAC Type 66K Digital Overcurrent Relay

3-

1

 GEK-106261

3 CALCULATION OF SETTINGS

3

GEK-106261 3 CALCULATION OF SETTINGS

3.1 DESCRIPTION

When replacing IAC 66K relays, review the time current curves of the digital relays to verify that they conform
to the relays being replaced. In some cases it may be necessary to redo the coordination study to assure coor-
dination with other devices.

The base time of the Definite Time Curve is 1 second. The base time is multiplied by the time dial to provide
the actual operating time. The default or lowest time dial setting for the Definite Time Curve is 0.1.

The I

2

T curve has a K value of 250 @ time dial of 1. The range is from 25 to 2475 in steps of 25 set by the time

dial. The default or lowest time dial setting for the I

2

T curve is 0.1.

Pickup for the TOC/ Inst unit is settable from 0.5 to 15.9 amps in 0.1 amp increments for the 5 amp model, and
0.1 to 3.18 amps in 0.02 amp increments for the 1 amp model, a setting of 0 disables the TOC element. The
time dial can be set from 0.5 to 9.9 in 0.1 increments on both the 5 amp model and the 1 amp model. The only
exception is for the Definite Time and I

2

T curves where 0.1 is the minimum value.

The IOC function is settable from 1 to 159 amps in 1 amp increments for the 5 amp model, and 0.2 to 31.8
amps in increments of 0.2 amps for the 1 amp model. Setting the pickup to 0 disables the IOC element. Both
models have an IOC delay adjustment from 50 to 400 milliseconds in 25 millisecond steps.

The formula is:

IOC delay

 (in milliseconds) = 

DS

 

×

 25 + 25

where 

DS

 is setting on IOC delay dial.

The TOC reset characteristic can be controlled from the front panel. The TOC reset can be set to “timed reset”
which emulates the characteristic of an induction disk relay, or “instantaneous reset” where the reset is fixed at
40 to 50 milliseconds. 

The system frequency can be set for 50 or 60 Hz controlled from the front panel.

The High Set Standard (EM) Instantaneous unit pickup range can be adjusted continuously over a four to one
range by using the adjustable pose piece. When the top of the core is lined up with the calibration stamping, an
approximate value of pickup can be determined. Dropout is at least 40 to 50 percent of pickup.

Summary of Contents for DIAC 66K

Page 1: ...DV130 A03 Manual P N GEK 106261C Copyright 2000 GE Power Management GE Power Management 215 Anderson Avenue Markham Ontario Canada L6E 1B3 Tel 905 294 6222 Fax 905 294 8512 Internet http www GEindustrial com pm Manufactured under an ISO9002 Registered system g GE Power Management ...

Page 2: ......

Page 3: ...hould further information be desired or should particular problems arise which are not covered sufficiently for the purchaser s purpose the matter should be referred to the General Electric Company To the extent required the products described herein meet applicable ANSI IEEE and NEMA standards but no such assurance is given with respect to local codes and ordinances because they vary greatly ...

Page 4: ......

Page 5: ...D STORAGE 4 3 4 10 TARGET AND SEAL IN UNIT 4 3 5 INSTALLATION 5 1 ENVIRONMENT 5 1 5 2 MOUNTING 5 1 5 3 SURGE GROUND 5 1 5 4 INTERNAL EXTERNAL CONNECTIONS 5 2 5 5 PANEL MOUNTING AND DRILLING 5 5 5 6 MOTOR PROTECTION CHARACTERISTIC CURVE 5 6 6 ACCEPTANCE PERIODIC TESTS 6 1 DESCRIPTION 6 1 6 2 VISUAL INSPECTION 6 1 6 3 MECHANICAL INSPECTION 6 1 6 4 DRAWOUT RELAYS GENERAL 6 1 6 5 TOC ALARM UNIT 6 2 a ...

Page 6: ...ii DIAC Type 66K Digital Overcurrent Relay GE Power Management TABLE OF CONTENTS 7 SPECIFICATIONS 7 1 BURDENS 7 1 7 2 RATINGS 7 2 7 3 ENVIRONMENTAL 7 2 ...

Page 7: ...al Overcurrent Relay includes the following features Digital single Phase overcurrent protection General purpose feeder protection 50 51 applications Motor Protection Self powered 9 Selectable curves Reset curve enable disable Low Burden Fully Retrofittable Functional separate TOC IOC TOC alarm Standard EM IOC operations Wide settings range Drawout case construction The 66LT curve is used by this ...

Page 8: ...larm output max current to 1 A 1 standard hi set IOC EM dual range target relay 2 to 16 A time dial 0 1 to 9 9 sec 50 60 Hz with instantaneous or timed reset plus IOC delay Duplicates the IAC 66K function C Same as B except one 1 standard hi set dual range target relay unit 10 to 80 A D Same as B except one 1 standard hi set dual range target relay unit 20 to 160 A Current Rating 1 1 Amp Nominal C...

Page 9: ...ACTERISTIC CURVE on page 5 6 with the normal EM dropout instantaneous unit 50 A set above locked rotor current The TOC reset characteristics can emulate those of an induction disk or set for fast reset with no intentional delay The time overcurrent unit must coordinate with the motor thermal limit Typical settings to accomplish this are listed in the table below The user must determine the specifi...

Page 10: ...the 1 and 5 A units Numbered curves 55 57 66 75 and 95 match the shape of the respective IAC model however the time dial positions are not one to one equivalents The IEC IEEE and I2 t curves are based on the equations listed with the corresponding curves on pages 2 11 to 2 18 The I2 t curve has a K value equal to the time dial times 250 The minimum value of K is 25 0 1 250 and the maximum value is...

Page 11: ...Figure 2 1 IAC51 TOC CURVE 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 1 2 3 4 5 6 6 7 1 2 3 4 5 6 6 7 10 2 3 4 5 6 6 7 100 RESET OPERATE 5 1 2 3 4 5 6 7 8 9 9 9 Multiples of Pickup Setting Time in Seconds TIME DIAL SETTINGS 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays ...

Page 12: ... 2 IAC53 TOC CURVES 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 01 2 3 4 4 5 6 0 1 2 3 4 4 5 6 1 2 3 4 4 5 6 10 2 3 4 4 5 6 100 2 RESET OPERATE 0 5 1 2 3 4 5 6 7 8 9 9 9 Multiples of Pickup Setting TIME DIAL SETTINGS Time in Seconds 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays ...

Page 13: ... 2 3 55 SHORT TIME TOC CURVES 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 01 2 3 4 5 6 6 7 0 1 2 3 4 5 6 6 7 1 2 3 4 5 6 6 7 10 RESET OPERATE 0 5 1 2 3 4 5 6 7 8 9 9 9 Multiples of Pickup Setting 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays Time in Seconds TIME DIAL SETTINGS ...

Page 14: ... 2 Figure 2 4 57 MEDIUM TIME TOC CURVES 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 1 2 3 4 5 6 6 7 1 2 3 4 5 6 6 7 10 2 3 4 5 6 6 7 100 RESET OPERATE 5 1 2 3 4 5 6 7 8 9 9 9 Multiples of Pickup Setting 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays TIME DIAL SETTINGS ...

Page 15: ...66 LONG TIME TOC CURVES 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 1 2 3 4 5 5 6 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 2 3 4 5 5 6 1000 RESET OPERATE 0 5 1 2 3 4 5 6 7 8 9 9 9 Multiples of Pickup Setting Time in Seconds 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays TIME DIAL SETTINGS ...

Page 16: ...75 SHORT TIME TOC CURVES 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 01 2 3 4 5 5 6 0 1 2 3 4 5 5 6 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 RESET OPERATE 0 5 1 2 3 4 5 6 7 8 9 9 9 Multiples of Pickup Setting Time in Seconds TIME DIAL SETTINGS 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays ...

Page 17: ... 7 IAC77 TOC CURVES 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 01 2 3 4 4 5 6 0 1 2 3 4 4 5 6 1 2 3 4 4 5 6 10 2 3 4 4 5 6 100 2 RESET OPERATE 0 5 1 2 3 4 5 6 7 9 9 9 8 Multiples of Pickup Setting 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays TIME DIAL SETTINGS Time in Seconds ...

Page 18: ...95 SHORT TIME TOC CURVES 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 01 2 3 4 5 5 6 0 1 2 3 4 5 5 6 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 RESET OPERATE 0 5 1 2 3 4 5 6 7 8 9 9 9 Multiples of Pickup Setting 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays Time in Seconds TIME DIAL SETTINGS ...

Page 19: ...NVERSE TOC CURVES 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 01 2 3 4 5 5 6 0 1 2 3 4 5 5 6 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 RESET OPERATE 3 2 1 0 5 4 5 6 7 8 9 9 9 Multiples of Pickup Setting 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays Time in Seconds TIME DIAL SETTINGS t TD 0 97 M 2 1 t TD 0 014 M 0 02 1 ...

Page 20: ...ERY INVERSE TOC CURVES 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 01 2 3 4 4 5 6 0 1 2 3 4 4 5 6 1 2 3 4 4 5 6 10 2 3 4 4 5 6 100 2 RESET OPERATE 0 5 1 2 3 4 5 6 9 9 7 8 9 Multiples of Pickup Setting 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays Time in Seconds TIME DIAL SETTINGS t TD 4 32 M 2 1 t TD 1 35 M 1 ...

Page 21: ...EMELY INVERSE TOC CURVES 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 01 2 3 4 4 5 6 0 1 2 3 4 4 5 6 1 2 3 4 4 5 6 10 2 3 4 4 5 6 100 2 RESET OPERATE 0 5 9 9 9 8 7 6 5 4 3 2 1 Multiples of Pickup Setting 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays Time in Seconds TIME DIAL SETTINGS t TD 5 82 M 2 1 t TD 8 0 M 2 1 ...

Page 22: ...RSE TOC CURVES 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 01 2 3 4 5 5 6 0 1 2 3 4 5 5 6 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 RESET OPERATE 0 5 1 2 3 4 5 6 7 8 9 9 9 Multiples of Pickup Setting 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays Time in Seconds TIME DIAL SETTINGS t TD 0 97 M 2 1 t TD 0 013 M 0 02 1 0 0228 ...

Page 23: ...NVERSE TOC CURVES 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 01 2 3 4 4 5 6 0 1 2 3 4 4 5 6 1 2 3 4 4 5 6 10 2 3 4 4 5 6 100 2 RESET OPERATE 0 5 1 2 3 4 5 6 7 8 9 9 9 Multiples of Pickup Setting 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays TIME DIAL SETTINGS Time in Seconds t TD 4 32 M 2 1 t TD 3 922 M 2 1 0 0982 ...

Page 24: ...Y INVERSE TOC CURVES 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 01 2 3 4 4 5 6 0 1 2 3 4 4 5 6 1 2 3 4 4 5 6 10 2 3 4 4 5 6 100 2 RESET OPERATE 0 5 1 2 3 4 5 6 7 8 9 9 9 Multiples of Pickup Setting 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays TIME DIAL SETTINGS Time in Seconds t TD 5 82 M 2 1 t TD 5 64 M 2 1 0 02434 ...

Page 25: ... 2 15 DEFINITE TIME 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 3 4 5 5 6 7 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 7 10 2 3 4 5 5 6 7 100 RESET OPERATE 0 5 1 2 4 5 6 7 8 9 9 9 3 Multiples of Pickup Setting 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays TIME DIAL SETTINGS Time in Seconds ...

Page 26: ...2 16 I2 T TIME CURVE 0 1 2 3 4 5 5 6 7 1 2 3 4 5 5 6 10 2 3 4 5 5 6 100 0 1 2 3 4 4 5 1 2 3 4 4 5 10 2 3 4 4 5 100 2 3 4 4 5 1000 2 3 RESET OPERATE 0 5 1 2 3 4 5 6 7 8 9 9 9 Multiples of Pickup Setting 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays TIME DIAL SETTINGS Time in Seconds t TD 250 M 2 1 t TD 250 M 2 ...

Page 27: ...CT DESCRIPTION 2 Figure 2 17 IOC CURVE FOR THE HDO INSTANTANEOUS UNIT Figure 2 18 STANDARD EM INSTANTANEOUS UNIT Multples of Pickup Setting 20 30 40 50 60 70 80 90 100 1 2 3 4 5 6 7 8 9 10 1 5 1 1 Time in Milliseconds 0 1 to 3 18 A 1 Amp Relays Current Range 0 5 to 15 9 A 5 Amp Relays ...

Page 28: ...2 20 DIAC Type 66K Digital Overcurrent Relay GE Power Management 2 PRODUCT DESCRIPTION GEK 106261 2 Figure 2 19 IOC CURVE FOR THE STANDARD EM INSTANTANEOUS UNIT ...

Page 29: ...he time dial can be set from 0 5 to 9 9 in 0 1 increments on both the 5 amp model and the 1 amp model The only exception is for the Definite Time and I2 T curves where 0 1 is the minimum value The IOC function is settable from 1 to 159 amps in 1 amp increments for the 5 amp model and 0 2 to 31 8 amps in increments of 0 2 amps for the 1 amp model Setting the pickup to 0 disables the IOC element Bot...

Page 30: ...3 2 DIAC Type 66K Digital Overcurrent Relay GE Power Management 3 CALCULATION OF SETTINGS GEK 106261 3 ...

Page 31: ...olor of the indicator note the arrow location all switches are shown in the 9 00 position Figure 4 1 DIAC 66K POINTER STYLES The TOC pickup current is set directly in Amps with two rotary switches An arrow is used to indicate setting position Setting the TOC or the IOC pickup current between but not including 0 and a value less than mini mum 0 5 5amp or 0 1 1Amp will result in the relay defaulting...

Page 32: ...ckup setting for both the 1amp and 5 amp models A blinking LED indicates the microprocessor is executing code and outputting signals The relay uses a target and seal in unit as its TOC IOC tripping element And the relay uses one target for the high set standard IOC unit The targets are mechanically latched when the function trips The TOC IOC con tacts will remain closed until the trip circuit curr...

Page 33: ...in the correct position 4 9 RECEIVING HANDLING AND STORAGE Immediately upon receipt the relay should be unpacked and examined for any damage sustained during ship ment If damage occurred during shipment a damage claim should be filed at once with the transportation com pany and the nearest GE sales office should be notified If the relay is not installed immediately it should be stored in its origi...

Page 34: ... DIAC Type 66K Digital Overcurrent Relay GE Power Management 4 HARDWARE DESCRIPTION GEK 106621 4 Figure 4 2 OPERATING COIL TAPPED AT 2A FACTORY DEFAULT 0 2 A SETTING 2 A SETTING 0 2 A SETTING 0 2 A SETTING ...

Page 35: ...ides accessibility to both the front and rear of the unit The outline and panel drilling dimensions are provided in Figure 5 4 DIAC PANEL MOUNTING AND DRILLING on page 5 5 5 3 SURGE GROUND The relay should be grounded to the station ground mat with a 12 AWG braided ground lead connected to ter minal 4 If the relay is to be retrofitted in a panel terminal 4 should be removed from the new case and i...

Page 36: ...5 2 DIAC Type 66K Digital Overcurrent Relay GE Power Management 5 INSTALLATION GEK 106261 5 5 4 INTERNAL EXTERNAL CONNECTIONS Figure 5 1 DIAC TYPE 66K INTERNAL EXTERNAL CONNECTIONS ...

Page 37: ...C TYPE 66K INTERNAL CONNECTIONS DIAGRAM FOR REFERENCE 1 6 5 4 2 9 10 C D A B 6A INSULATED STAND OFF INSTANTANEOUS UNIT INDUCTION UNIT SEAL IN UNIT SHORT FINGER NOTE Instantaneous unit connections are for range operation For high range operation connect B and D to terminal no 6 and A and C to terminal no 4 ...

Page 38: ...5 4 DIAC Type 66K Digital Overcurrent Relay GE Power Management 5 INSTALLATION GEK 106261 5 Figure 5 3 TYPICAL EXTERNAL CONNNECTIONS FOR MOTOR PROTECTION ...

Page 39: ...TG SCREWS 218 2 HOLES 1 468 37MM 133MM 12MM 3 4 DRILL 10 HOLES 5MM 224MM 56MM 112MM 168MM 29MM 19MM 157MM 9 125 232MM 4 406 112MM 3 906 99MM 76MM 1 125 144MM BACK VIEW C L L C L C 15MM 19MM MTG MTG SEMI FLUSH SURFACE 2 5 16 18 STUDS FOR SURFACE MTG 10 32 STUDS 8 375 212MM 76MM VIEW SHOWING ASSEMBLY OF HARDWARE FOR SURFACE MTG ON STEEL PANELS PANEL DRILLING FOR SEMI FLUSH MOUNTING FRONT VIEW 5 16 1...

Page 40: ...5 6 DIAC Type 66K Digital Overcurrent Relay GE Power Management 5 INSTALLATION GEK 106261 5 5 6 MOTOR PROTECTION CHARACTERISTIC CURVE Figure 5 5 MOTOR PROTECTION CHARACTERISTIC CURVE ...

Page 41: ...2 Make sure that the fingers and shorting bars agree with the internal connections diagram CAUTION Every circuit in the drawout case has an auxiliary brush It is especially important on cur rent circuits and other circuits with shorting bars that auxiliary brush be bent high enough to engage 6 4 DRAWOUT RELAYS GENERAL Since all drawout relays in service operate in their cases it is recommended tha...

Page 42: ...ase set it not to blink Reduce the current applied verifying that at a value between 95 and 100 of the pickup TOC the relay Pickup LED turns off or blinks if set to blink Figure 6 1 TOC ALARM UNIT TEST SETUP b VERIFICATION OF OPERATING TIME Because the Digital self powered series of relays has many different curve characteristics the basic test instruction will be given and the data for each of th...

Page 43: ...power up and pickup please set it not to blink Reduce the current applied verifying that at a value between 95 and 100 of the pickup TOC the relay Pickup LED turns off or blinks if set to blink Table 6 1 PICKUP TIMES FOR VARYING MULTIPLES OF PICKUP MPU CURVE PICKUP TIMES IN SECONDS 2 MPU 5 MPU 10 MPU IAC 51 3 62 to 4 05 1 69 to 1 86 1 19 to 1 32 IAC 53 6 66 to 7 36 1 25 to 1 37 0 687 to 0 759 55 S...

Page 44: ...o the lowest setting not including zero This allows the TOC function to operate without coordinating with the Instanta neous HDO unit Successively apply currents of 2 5 and 10 times pickup TOC verifying that the operating times are within the margins indicated in Table 6 1 PICKUP TIMES FOR VARYING MULTIPLES OF PICKUP MPU on page 6 3 6 7 TOC INSTANTANEOUS HDO UNIT DEFINITE TIME For the Definite Tim...

Page 45: ...ce angle A graph of how the instantaneous unit varies as a function of input current is provided for refer ence in Figure 2 17 IOC CURVE FOR THE HDO INSTANTANEOUS UNIT on page 2 19 Table 6 2 PICKUP TIMES FOR VARYING TIME DIALS CURVE PICKUP TIMES IN SECONDS FOR TIME DIAL SETTINGS 10 7 3 1 IAC 51 3 62 to 4 05 2 42 to 2 69 0 996 to 1 106 0 372 to 0 413 IAC 53 2 73 to 3 03 1 78 to 1 98 0 742 to 0 824 ...

Page 46: ...ANEOUS UNIT TEST SETUP Table 6 3 PICKUP TIMES FOR VARYING TIME DIALS RANGE SUB RANGE SERIES OR PARALLEL RATINGS CONTINUOUS 1 SECOND 0 5 to 4 0 0 5 to 2 0 SERIES 0 75 25 0 1 0 to 4 0 PARALLEL 1 5 50 0 2 0 to 16 0 2 0 to 8 0 SERIES 3 0 130 0 4 0 to 16 0 PARALLEL 6 0 260 0 10 0 to 80 0 10 0 to 40 0 SERIES 15 0 400 0 20 0 to 80 0 PARALLEL 25 0 600 0 20 0 to 160 0 20 0 to 80 0 SERIES 25 0 600 0 40 0 to...

Page 47: ...he relay from its case and visually inspecting the contacts for corrosion 6 11 SERVICING If the relay fails to perform as specified in this instruction manual consult the factory or call your local GE sales office Before returning the relay consult with the GE Power Management technical support It is not recommended that the relay be serviced to the component level This requires substantial invest...

Page 48: ...6 8 DIAC Type 66K Digital Overcurrent Relay GE Power Management 6 ACCEPTANCE PERIODIC TESTS GEK 106261 6 Figure 6 4 REAR FRONT AND TOP VIEWS OF THE DIAC TYPE 66K INTERIOR ...

Page 49: ...GE Power Management DIAC Type 66K Digital Overcurrent Relay 6 9 GEK 106261 6 ACCEPTANCE PERIODIC TESTS 6 Figure 6 5 DIAC 66K FRONT AND REAR VIEWS ...

Page 50: ...6 10 DIAC Type 66K Digital Overcurrent Relay GE Power Management 6 ACCEPTANCE PERIODIC TESTS GEK 106261 6 ...

Page 51: ...ent will be constant irre spective of pick up settings on both TOC and IOC units Figure 7 1 BURDEN CURVE BURDENS 0 1A 0 5 A unit 0 45 VA 1 0A 5 0 A unit 2 6 VA Table 7 1 BURDEN SETTINGS BURDEN at MINIMUM SETTING BURDEN IN Ω Z at MULTIPLES OF MINIMUM PICKUP UNIT RANGE Hz R jX Z 3x 10x 20x 100x 1A 0 1 31 8 60 28 8 29 2 41 3 45 9 36 2 32 1 24 0 768 5A 0 5 15 9 60 1 28 1 15 1 74 42 0 394 0 094 0 052 0...

Page 52: ...90 1 1989 Per IEC 255 4 RADIO FREQUENCY WITHSTAND 25 MHz to 1 GHz keyed every 1 MHz for 2 seconds Per ANSI C37 90 2 Per IEC 60255 22 3 ELECTROSTATIC DISCHARGE Per IEC 60255 22 2 NOTE The DIAC Type 66K relay must be powered up at least once per year to avoid deterioration of electrolytic capacitors and subsequent relay failiure Table 7 2 MAXIMUM PERMISSIBLE CURRENT 1 A MODEL 5 A MODEL Continuous 3 ...

Page 53: ...LEASE DATE ECO GEK 106261 GEK 106261A GEK 106261B SPDV130 A03 November 1 1999 GEK 106261C SPDV130 A03 November 16 2000 DIAC66K 007 Table A 2 ADDITIONS CHANGES TO DGP MANUAL GEK 106261C PAGE IN GEK 106261B ADDITION CHANGE to GEK 106261C cover Updated GE contact information and manual part number Moved warning concerning electrolytic capacitor deterioration to the SPECIFICATIONS chapter 4 4 Updated ...

Page 54: ...A 2 DIAC Type 66K Digital Overcurrent Relay GE Power Management A 1 CHANGE NOTES APPENDIXA A ...

Page 55: ...6 1 E ENVIRONMENT 5 1 ENVIRONMENTAL SPECIFICATIONS 7 2 EXTERNAL CONNNECTIONS FOR MOTOR PROTECTION 5 4 F FEATURES 1 1 FRONT VIEW 1 1 FRONT VIEW OF DIAC 66K 6 9 FUNCTIONAL BLOCK DIAGRAM 1 2 H HANDLING 4 3 HARDWARE DESCRIPTION 4 1 I I2T TIME CURVE 2 18 IAC51 TOC CURVE 2 3 IAC53 TOC CURVES 2 4 IAC77 TOC CURVES 2 9 IEC EXTREMELY INVERSE TOC CURVES 2 13 IEC INVERSE TOC CURVES 2 11 IEC VERY INVERSE TOC C...

Page 56: ...AGE 4 3 SURGE GROUND 5 1 T TARGET AND SEAL IN UNIT 4 3 TARGETS 4 2 TESTS see ACCEPTANCE TESTS and PERIODIC TESTS TIME OVERCURRENT CURVES see TOC CURVES TOC INSTANTANEOUS HDO UNIT DEFINITE TIME 6 4 TOC INSTANTANEOUS HDO UNIT INVERSE TIME 6 3 TOC ALARM UNIT 6 2 TOC CURVES 55 short time 2 5 57 medium time 2 6 66 long time 2 7 75 short time 2 8 95 short time 2 10 IAC51 2 3 IAC53 2 4 IAC77 2 9 IEC extr...

Page 57: ...GE Power Management DIAC Type 66K Digital Overcurrent Relay NOTES ...

Page 58: ...ted Product Selector Guide A graphical tool for finding the product you are inter ested in Sales Offices A complete listing of world wide sales offices Technical Support Complete contact information is available Instruction Manuals Manuals for many products are now available online GE Product Software The latest working versions of product software Technical Drawings Many technical drawings are av...

Page 59: ...GE Power Management DIAC Type 66K Digital Overcurrent Relay NOTES ...

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