DIAC Type 66K. DIGITAL OVERCURRENT RELAY Instruction Manual. GE Power Management

Transcription

1 g GE Power Management DIAC Type K DIGITAL OVERCURRENT RELAY Instruction Manual DIAC K Revision: SPDV0.A0 Manual P/N: GEK-0C Copyright 000 GE Power Management GE Power Management Anderson Avenue, Markham, Ontario Canada LE B Tel: (90) 9- Fax: (90) 9-8 Internet: Manufactured under an ISO900 Registered system.

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3 These instructions do not purport to cover all details or variations in equipment nor provide for every possible contingency to be met in connection with installation, operation, or maintenance. Should 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.

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5 TABLE OF CONTENTS. INTRODUCTION. FEATURES ORDER CODES PRODUCT DESCRIPTION. GENERAL APPLICATION RATINGS TOC FUNCTIONS CALCULATION OF SETTINGS. DESCRIPTION HARDWARE DESCRIPTION. CASE ADJUSTMENTS: DIGITAL UNITS ADJUSTMENTS: STANDARD INSTANTANEOUS UNIT TARGETS AND INDICATORS RESET TARGETS MANUAL TRIP CIRCUIT TEST TRIP CIRCUIT DIAC K COVER INSTALLATION RECEIVING, HANDLING, AND STORAGE TARGET AND SEAL-IN UNIT INSTALLATION. ENVIRONMENT MOUNTING SURGE GROUND INTERNAL/EXTERNAL CONNECTIONS PANEL MOUNTING AND DRILLING MOTOR PROTECTION CHARACTERISTIC CURVE ACCEPTANCE/PERIODIC TESTS. DESCRIPTION VISUAL INSPECTION MECHANICAL INSPECTION DRAWOUT RELAYS, GENERAL TOC ALARM UNIT... - a PICKUP VERIFICATION... - b VERIFICATION OF OPERATING TIME TOC / INSTANTANEOUS HDO UNIT INVERSE TIME... - a PICKUP VERIFICATION... - b VERIFICATION OF OPERATING TIME TOC / INSTANTANEOUS HDO UNIT DEFINITE TIME... - a VERIFICATION OF TIME DIAL INSTANTANEOUS HDO UNIT STANDARD INSTANTANEOUS UNIT PERIODIC TESTS SERVICING... - GE Power Management DIAC Type K Digital Overcurrent Relay i

6 TABLE OF CONTENTS. SPECIFICATIONS. BURDENS RATINGS ENVIRONMENTAL... - ii DIAC Type K Digital Overcurrent Relay GE Power Management

7 GEK-0 GEK-0 INTRODUCTION INTRODUCTION. FEATURES Figure : FRONT VIEW OF THE DIAC TYPE K RELAY The DIAC Type K Digital Overcurrent Relay includes the following features: Digital single Phase overcurrent protection General purpose feeder protection 0 / 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 LT curve is used by this relay. GE Power Management DIAC Type K Digital Overcurrent Relay -

8 INTRODUCTION GEK-0 MAIN BUS DIAC Type K CTs 0 BLOCKDGM.CDR Figure : FUNCTIONAL BLOCK DIAGRAM. ORDER CODES Table : ORDER CODES FOR THE DIAC TYPE K RELAY DIAC * * Base Unit DIAC Base Unit Digital Overcurrent Component Relay, S Case Configuration One TOC/IOC target & seal-in; TOC alarm output (max. current to A); standard hi-set IOC EM dual range B target relay ( to A); time dial 0. to 9.9 sec., 0 & 0 Hz with instantaneous or timed reset plus IOC delay. Duplicates the IAC K function. C Same as B except one standard hi-set dual range target relay unit (0 to 80 A) D Same as B except one standard hi-set dual range target relay unit (0 to 0 A) Current Rating Amp Nominal Current Amp Nominal Current Revision Level B Revision Level - DIAC Type K Digital Overcurrent Relay GE Power Management

9 GEK-0 GEK-0 PRODUCT DESCRIPTION PRODUCT DESCRIPTION. GENERAL The DIAC is a self-powered, single-phase, digital overcurrent relay. This digital overcurrent relay is sometimes referred to as the Type K relay, as it was designed to replace the IACK Motor Protection relay. The Type K relays are single-phase, current operated AC devices designed for motor protection. They utilize selectable time-current characteristics (shown on pages to 8). Each relay consists of a time overcurrent unit, a dual-rated target seal-in unit, and a hinge-type instantaneous overcurrent unit. The available ranges in amperes of these units, as well as information on their continuous rating, contact rating, and top ratings are given in Section.: RATINGS. The DIAC K is packaged in a GE S style case. See Figure : DIAC PANEL MOUNTING AND DRILLING on page section for mounting dimensions. The internal connections are shown in Figure : DIAC TYPE K INTERNAL/EXTERNAL CONNECTIONS on page. The DIAC K uses waveform sampling of the current input together with appropriate algorithms to provide time overcurrent (TOC) and instantaneous overcurrent (IOC) functions.. APPLICATION The DIAC Type K is especially suited for motor protection. The relay contains an electronic (IOC) high dropout instantaneous unit to discriminate between motor-running overload and locked-rotor current. This is accomplished by setting pickup of the high dropout unit (0/B) between motor full-load current and locked-rotor current as illustrated in Figure : MOTOR PROTECTION CHARACTERISTIC CURVE on page, with the normal (EM) dropout instantaneous unit (0/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: Table : DIAC K SETTING RANGE UNIT / FUNCTION PICKUP SETTING (multiples of nominal current A/A) Time Overcurrent Unit. to 0 Normal Dropout Instantaneous Overcurrent Unit 0/A 8 to High Dropout Instantaneous Overcurrent Unit 0/B. to 0 The user must determine the specific settings which will provide the required protection for his machine, and select a relay model having the operating ranges needed to obtain these settings. With settings as illustrated in Figure : MOTOR PROTECTION CHARACTERISTIC CURVE on page and external connections shown in Figure : TYPICAL EXTERNAL CONNNECTIONS FOR MOTOR PRO- TECTION on page, the operation of the DIACK relay will be as follows: For motor overloads, the time overcurrent unit () will time out, picking up an external auxiliary X, which sounds an alarm (Stud # ). For the locked-rotor condition, the high-dropout unit (0/B) will pick up instantaneously and the TOC () will pick up with a time delay consistent with the motor thermal limit. When both units have operated, the breaker will be tripped (Stud 0). For a fault, the (EM) normal dropout instantaneous unit (0/A) will pick up instantaneously and trip the breaker (Stud ). NOTE: The relay can also be used by setting the Instantaneous HDO setting switch to the lowest setting, not including 0. This will allow the Instantaneous HDO unit to pickup at 0. A or 0. A, thus enabling TOC to operate independently using stud 0. Use stud as the Standard High Set IOC. GE Power Management DIAC Type K Digital Overcurrent Relay -

10 PRODUCT DESCRIPTION GEK-0 Table : RATINGS OF TARGET AND SEAL-IN COIL. RATINGS CURRENT OPERATED UNITS DUAL-RATED AMP 0. AMP TAP.0 AMP TAP Carry 0 amps for (seconds) 0.0. Carry 0 amps for (seconds) 0..0 Carry continuously (amperes) 0.. Minimum operating (amperes) 0..0 Minimum dropout (amperes) DC resistance (ohms) hertz impedance (ohms) hertz impedance (ohms) 0.. TOC FUNCTIONS The TOC function operates on an RMS current calculated from the sampled values. The IOC function operates on the sampled values, and the algorithm virtually eliminates the decaying DC offset component to achieve low transient overreach of less than %. The relays contain two independent settings: one for TOC and one for IOC. These two settings control the TOC/Instantaneous function of Stud 0. The TOC/Instantaneous units operate in series with each other as in the Application Diagram shown in Figure : TYPICAL EXTERNAL CONNNECTIONS FOR MOTOR PRO- TECTION on page. The TOC function provides selectable time current curves: IAC IAC -SHORT TIME -MEDIUM TIME -LONG TIME (DIAC Type K) -SHORT TIME IAC 9-SHORT TIME IEC Inverse IEC Very Inverse IEC Extremely Inverse IEEE Inverse IEEE Very Inverse IEEE Extremely Inverse Definite Time I T The IAC, IAC, and IAC curves match the time current curve of the respective IAC model. This includes the 0. through 9.9 time dial setting for the and A units. Numbered curves,,,, and 9 match the shape of the respective IAC model; however, the time dial positions are not one-to-one equivalents. The IEC, IEEE, and I t curves are based on the equations listed with the corresponding curves on pages to 8. The I t curve has a K value equal to the time dial times 0. The minimum value of K is (0. 0) and the maximum value is (9.9 0). NOTE: IEC equations are defined by IEC - and IEEE equations are defined by IEEE PC. - DIAC Type K Digital Overcurrent Relay GE Power Management

11 GEK-0 PRODUCT DESCRIPTION 00 RESET OPERATE 0 Time in Seconds TIME DIAL SETTINGS Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) Multiples of Pickup Setting Figure : IAC TOC CURVE GE Power Management DIAC Type K Digital Overcurrent Relay -

12 PRODUCT DESCRIPTION GEK-0 00 RESET OPERATE 0 Time in Seconds TIME DIAL SETTINGS Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) Multiples of Pickup Setting Figure : IAC TOC CURVES - DIAC Type K Digital Overcurrent Relay GE Power Management

13 GEK-0 PRODUCT DESCRIPTION 0 RESET OPERATE Time in Seconds TIME DIAL SETTINGS Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) Multiples of Pickup Setting Figure : SHORT TIME TOC CURVES GE Power Management DIAC Type K Digital Overcurrent Relay -

14 PRODUCT DESCRIPTION GEK-0 00 RESET OPERATE TIME DIAL SETTINGS Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) Multiples of Pickup Setting Figure : MEDIUM TIME TOC CURVES - DIAC Type K Digital Overcurrent Relay GE Power Management

15 GEK-0 PRODUCT DESCRIPTION 000 RESET OPERATE 00 Time in Seconds TIME DIAL SETTINGS Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) Multiples of Pickup Setting Figure : LONG TIME TOC CURVES GE Power Management DIAC Type K Digital Overcurrent Relay -

16 PRODUCT DESCRIPTION GEK-0 00 RESET OPERATE 0 Time in Seconds TIME DIAL SETTINGS Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) Multiples of Pickup Setting Figure : SHORT TIME TOC CURVES -8 DIAC Type K Digital Overcurrent Relay GE Power Management

17 GEK-0 PRODUCT DESCRIPTION 00 RESET OPERATE 0 Time in Seconds 0. Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) TIME DIAL SETTINGS Multiples of Pickup Setting Figure : IAC TOC CURVES GE Power Management DIAC Type K Digital Overcurrent Relay -9

18 PRODUCT DESCRIPTION GEK-0 00 RESET OPERATE 0 Time in Seconds 0. Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) TIME DIAL SETTINGS Multiples of Pickup Setting Figure 8: 9 SHORT TIME TOC CURVES -0 DIAC Type K Digital Overcurrent Relay GE Power Management

19 GEK-0 PRODUCT DESCRIPTION 00 RESET OPERATE 0 Time in Seconds TIME DIAL SETTINGS Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) Multiples of Pickup Setting RESET TIME: t TD = ; PICKUP TIME: t = TD M M 0.0 Figure 9: IEC INVERSE TOC CURVES GE Power Management DIAC Type K Digital Overcurrent Relay -

20 PRODUCT DESCRIPTION GEK-0 00 RESET OPERATE 0 Time in Seconds 0. Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) TIME DIAL SETTINGS Multiples of Pickup Setting RESET TIME: t TD = ; PICKUP TIME: t = TD M M Figure 0: IEC VERY INVERSE TOC CURVES - DIAC Type K Digital Overcurrent Relay GE Power Management

21 GEK-0 PRODUCT DESCRIPTION 00 RESET OPERATE 0 Time in Seconds Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) Multiples of Pickup Setting RESET TIME: t TD = ; PICKUP TIME: t = TD M M Figure : IEC EXTREMELY INVERSE TOC CURVES TIME DIAL SETTINGS GE Power Management DIAC Type K Digital Overcurrent Relay -

22 PRODUCT DESCRIPTION GEK-0 00 RESET OPERATE 0 Time in Seconds TIME DIAL SETTINGS Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) Multiples of Pickup Setting RESET TIME: t TD = ; PICKUP TIME: t = TD M M 0.0 Figure : IEEE INVERSE TOC CURVES - DIAC Type K Digital Overcurrent Relay GE Power Management

23 GEK-0 PRODUCT DESCRIPTION 00 RESET OPERATE 0 Time in Seconds TIME DIAL SETTINGS 0. Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) Multiples of Pickup Setting RESET TIME: t TD = ; PICKUP TIME: t = TD M M Figure : IEEE VERY INVERSE TOC CURVES GE Power Management DIAC Type K Digital Overcurrent Relay -

24 PRODUCT DESCRIPTION GEK-0 00 RESET OPERATE 0 Time in Seconds 0. Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) TIME DIAL SETTINGS Multiples of Pickup Setting RESET TIME: t TD = ; PICKUP TIME: t = TD M M Figure : IEEE EXTREMELY INVERSE TOC CURVES 0. - DIAC Type K Digital Overcurrent Relay GE Power Management

25 GEK-0 PRODUCT DESCRIPTION 00 OPERATE Time in Seconds TIME DIAL SETTINGS Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) RESET Multiples of Pickup Setting Figure : DEFINITE TIME GE Power Management DIAC Type K Digital Overcurrent Relay -

26 PRODUCT DESCRIPTION GEK RESET OPERATE 00 Time in Seconds 0 0. Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) TIME DIAL SETTINGS Multiples of Pickup Setting 0 RESET TIME: t = TD ; PICKUP TIME: t = TD M M Figure : I T TIME CURVE -8 DIAC Type K Digital Overcurrent Relay GE Power Management

27 GEK-0 PRODUCT DESCRIPTION Time in Milliseconds Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) Multples of Pickup Setting Figure : IOC CURVE FOR THE HDO INSTANTANEOUS UNIT Figure 8: STANDARD (EM) INSTANTANEOUS UNIT GE Power Management DIAC Type K Digital Overcurrent Relay -9

28 PRODUCT DESCRIPTION GEK-0 Figure 9: IOC CURVE FOR THE STANDARD (EM) INSTANTANEOUS UNIT -0 DIAC Type K Digital Overcurrent Relay GE Power Management

29 GEK-0 GEK-0 CALCULATION OF SETTINGS CALCULATION OF SETTINGS. DESCRIPTION When replacing IAC K 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 coordination with other devices. The base time of the Definite Time Curve is 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.. The I T curve has a K value of time dial of. The range is from to in steps of set by the time dial. The default or lowest time dial setting for the I T curve is 0.. Pickup for the TOC/ Inst unit is settable from 0. to.9 amps in 0. amp increments for the amp model, and 0. to.8 amps in 0.0 amp increments for the amp model, a setting of 0 disables the TOC element. The time dial can be set from 0. to 9.9 in 0. increments on both the amp model and the amp model. The only exception is for the Definite Time and I T curves where 0. is the minimum value. The IOC function is settable from to 9 amps in amp increments for the amp model, and 0. to.8 amps in increments of 0. amps for the amp model. Setting the pickup to 0 disables the IOC element. Both models have an IOC delay adjustment from 0 to 00 milliseconds in millisecond steps. The formula is: IOC delay (in milliseconds) = DS + 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 0 to 0 milliseconds. The system frequency can be set for 0 or 0 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 0 to 0 percent of pickup. GE Power Management DIAC Type K Digital Overcurrent Relay -

30 CALCULATION OF SETTINGS GEK-0 - DIAC Type K Digital Overcurrent Relay GE Power Management

31 GEK-0 GEK-0 HARDWARE DESCRIPTION HARDWARE DESCRIPTION. CASE The DIAC relay consists of a case, cover, support structure, and a connection plug to make up the electrical connection. The case is shown in Figure : DIAC K FRONT AND REAR VIEWS on page 9. The external connections are shown in Figure : TYPICAL EXTERNAL CONNNECTIONS FOR MOTOR PROTEC- TION on page. It has 0 connection points and a CT shorting bar. As the connection plug is withdrawn, the trip circuit is broken prior to the current shorting bar engagement.. ADJUSTMENTS: DIGITAL UNITS All customer settings for the TOC Alarm and TOC/IOC are accessible from the front of the relay. The relay cover must be removed to gain access to the settings. The cover has provisions for a sealing wire. The settings are left to right, pickup current level for the time element, time dial, curve selection, frequency/reset time, pickup current level for the instantaneous element, and the instantaneous element time delay. The settings are all calibrated and are set by turning the rotary switch to the desired value. The switches are recessed, a small screw driver is required to make the adjustment. The relay may be supplied with one of three pointer styles as shown. The color is the color of the indicator, note the arrow location, all switches are shown in the 9:00 position. Pointer styles Yellow Orange White Figure : DIAC K 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 minimum 0. (amp) or 0. (Amp) will result in the relay defaulting to its minimum setting. Setting the TOC or IOC pickup current to 0 will disable their respective elements. Although the time dial can be set to a value less than minimum the relay will use the minimum setting.. ADJUSTMENTS: STANDARD INSTANTANEOUS UNIT The standard instantaneous unit is an electromagnet that attracts a hinged armature when sufficient current is applied. The armature carries a T shaped moving contact that bridges two stationary contacts when the coil is energized. A target is displayed when the unit operated. Pressing the button in the lower left corner of the relay cover resets the target. The pickup range can be adjusted continuously over a four to one range by using the adjustable pole piece. When the top of the core is lined up with the calibration stamping, an approximate value of pickup can be determined. Dropout is about 0 to 0 percent of pickup. Figure 9: IOC CURVE FOR THE STANDARD (EM) INSTANTANEOUS UNIT on page 0 shows the variation of operating time with applied current for this unit. Burden data of the standard unit is given the table below. GE Power Management DIAC Type K Digital Overcurrent Relay -

32 HARDWARE DESCRIPTION GEK-0 Table : DIAC K BURDEN DATA Pickup Range (A) Frequency (Hz) Amps Volt-Amps Impedance (Ω) Power Factor 0. to to to to to to to Volt-Amperes at five amps calculated from input at minimum pickup (I Z).. TARGETS AND INDICATORS The yellow pick-up LED, will come on solid for the TOC function when the input current to the relay is higher than the set point. The location of the LED is between the frequency/reset switch and the IOC pickup level switch. It may be desirable to know when the relay is powered up and operating. The relay must be energized at or above 9% of the minimum possible setting and below pick-up set point. To activate, turn the SELECT switch one step clockwise or one step counterclockwise. This will cause the pickup LED to blink at second intervals while current is below the pick-up set point. Minimum current is 9% of minimum TOC pickup setting for both the amp and 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 contacts will remain closed until the trip circuit current drops below 0.9 or.0 Amps, depending on the Seal-In tap setting. NOTE: The current will continue conducting through Stud to Stud 0 while the trip signal is still being sent to the TOC/Inst. Unit. - DIAC Type K Digital Overcurrent Relay GE Power Management

33 GEK-0 HARDWARE DESCRIPTION. RESET TARGETS Targets can be reset by lifting the target reset level at the lower left edge of the cover on the DIAC. The relay also provides a front panel trip circuit test. A actuating lever that must be pulled and then lifted is provided to trip the device connected to the relay. The level directly operates the trip contacts.. MANUAL TRIP CIRCUIT TEST The front panel contains two manual trip levers to test the trip circuit. The relay cover must be removed to access the lever. The lever must be pulled and then lifted which prevents unintentional uplifted to prevent unintentional operation.. TRIP CIRCUIT The trip circuit is NOT polarity sensitive. The trip circuit will not be damaged if connected in reverse. NOTE: Both trip circuits are suitable for use with Cap-Trip devices..8 DIAC K COVER INSTALLATION When replacing the cover on the DIAC relays the reset wire should be locked behind the nameplate by a slight left to right motion to place the reset wire in the correct position..9 RECEIVING, HANDLING, AND STORAGE Immediately upon receipt, the relay should be unpacked and examined for any damage sustained during shipment. If damage occurred during shipment a damage claim should be filed at once with the transportation company, and the nearest GE sales office should be notified. If the relay is not installed immediately, it should be stored in its original carton in a location that is dry and protected from dust, metallic chips and severe atmospheric conditions..0 TARGET AND SEAL-IN UNIT The target and seal-in unit has an operating coil tapped at 0. and.0 amperes. The relay is shipped from the factory with the tap screw in the lower-ampere position. The tap screw is the screw holding the right-hand stationary contact. To change the tap setting, first remove one screw from the left-hand stationary contact and place it in the desired tap. Next, remove the screw from the first undesired tap, and place it on the left-hand stationary contact where the first screw was removed. This is shown below in Figure : OPERATING COIL TAPPED AT A (FACTORY DEFAULT). This procedure is necessary to prevent the right-hand stationary contact from getting out of adjustment. NOTE: Screws should never be left in both taps at the same time! GE Power Management DIAC Type K Digital Overcurrent Relay -

34 HARDWARE DESCRIPTION GEK-0 0. A A SETTING 0. A SETTING Figure : OPERATING COIL TAPPED AT A (FACTORY DEFAULT) - DIAC Type K Digital Overcurrent Relay GE Power Management

35 GEK-0 GEK-0 INSTALLATION INSTALLATION. ENVIRONMENT Installation of the relay should be in a clean dry location that is free from dust.. MOUNTING The relay should be securely mounted on a vertical surface that provides accessibility to both the front and rear of the unit. The outline and panel drilling dimensions are provided in Figure : DIAC PANEL MOUNTING AND DRILLING on page.. SURGE GROUND The relay should be grounded to the station ground mat with a AWG braided ground lead connected to terminal. If the relay is to be retrofitted in a panel, terminal should be removed from the new case and installed into the old case. For the surge protection to function properly the relay must be grounded. GE Power Management DIAC Type K Digital Overcurrent Relay -

36 INSTALLATION GEK-0. INTERNAL/EXTERNAL CONNECTIONS Figure : DIAC TYPE K INTERNAL/EXTERNAL CONNECTIONS - DIAC Type K Digital Overcurrent Relay GE Power Management

37 GEK-0 INSTALLATION INDUCTION UNIT INSTANTANEOUS UNIT SEAL-IN UNIT A B C D A ** ** ** ** INSULATED STAND OFF 9 0 ** SHORT FINGER NOTE: Instantaneous unit connections are for range operation. For high range operation, connect B and D to terminal no. and A and C to terminal no. Figure : IAC TYPE K INTERNAL CONNECTIONS DIAGRAM (FOR REFERENCE) GE Power Management DIAC Type K Digital Overcurrent Relay -

38 INSTALLATION GEK-0 Figure : TYPICAL EXTERNAL CONNNECTIONS FOR MOTOR PROTECTION - DIAC Type K Digital Overcurrent Relay GE Power Management

39 GEK-0 INSTALLATION. PANEL MOUNTING AND DRILLING. 8MM SEMI-FLUSH SURFACE () /-8 STUDS MTG. MTG. FOR SURFACE MTG. 8. MM 9. MM / DRILL HOLES MM. MM.8 MM.8 MM GLASS. 9MM C L LC CUTOUT.8 MM.8 MM PANEL DRILLING FOR SEMI-FLUSH MOUNTING FRONT VIEW.0 MM () 0- X /8 MTG. SCREWS.8 MM PANEL. 9MM.8 MM 8.8 MM /8 DRILL HOLES MM.90 99MM.8 8MM L C.0 MM 0- STUDS.0 MM. MM / DRILL 0 HOLES 9MM STUD NUMBERING BACK VIEW CUTOUT MAY REPLACE DRILLED HOLES.0 MM. 9MM.8 MM.8 09MM.00 MM (TYPICAL) PANEL DRILLING FOR SURFACE MOUNTING FRONT VIEW CASE /-8 STUD.0 MM VIEW SHOWING ASSEMBLY OF HARDWARE FOR SURFACE MTG. ON STEEL PANELS Figure : DIAC PANEL MOUNTING AND DRILLING GE Power Management DIAC Type K Digital Overcurrent Relay -

40 INSTALLATION GEK-0. MOTOR PROTECTION CHARACTERISTIC CURVE Figure : MOTOR PROTECTION CHARACTERISTIC CURVE - DIAC Type K Digital Overcurrent Relay GE Power Management

41 GEK-0 GEK-0 ACCEPTANCE/PERIODIC TESTS ACCEPTANCE/PERIODIC TESTS. DESCRIPTION Immediately upon receipt of the relay, an inspection and acceptance test should be made to make sure that no damage has been sustained in shipment, and that the relay calibrations have not been disturbed.. VISUAL INSPECTION Check the nameplate stamping to make sure that the model number and rating of the relay agree with the requisition. Remove the relay from its case and check that there are no broken or cracked molded parts or other signs of physical damage, and that all screws are tight.. MECHANICAL INSPECTION. The target and seal-in unit, pull and lift the TOC/Instantaneous HDO lever to test the target, repeat the test for the IOC Standard High Set target. The Target flag should re-main when the lever is released. Reset the target by pushing the reset bar.. 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 current circuits and other circuits with shorting bars that auxiliary brush be bent high enough to engage. DRAWOUT RELAYS, GENERAL Since all drawout relays in service operate in their cases, it is recommended that they be tested in their cases or an equivalent case. A relay may be tested without removing it from the panel by using the appropriate test plug. For an S case use the XLA series test plug, refer to the GE Power Management Product Catalog, Products CD, or website (the URL is Although the test plugs provide greater flexibility, it re-quires CT shorting jumpers and exercise of greater care since connections are made to both the relay and the external circuitry. NOTE: Pickup calibration for any of the digital controlled outputs are calibrated by the factory and are not user set-able. Also the same electronics sample the analog signals whether TOC or IOC with the only difference being the software calculations. GE Power Management DIAC Type K Digital Overcurrent Relay -

42 ACCEPTANCE/PERIODIC TESTS GEK-0. TOC ALARM UNIT The TOC Alarm unit Is designed to operate an external alarm unit or auxiliary relay which can draw a maximum of Amp continuously. a) PICKUP VERIFICATION Connect the relay as indicated in Figure : TOC ALARM UNIT TEST SETUP. In order to apply current to the relay, use a 0/0 Hz voltage source, with a variable resistor in series, or an electronic current source. Set the relay at the desired pickup TOC and the Instantaneous HDO unit by setting the instantaneous current setting to zero. Apply current to the relay and verify that the Pickup LED on the front of the relay lights between 98% and 0% of the pickup TOC setting. If the relay is set to blink between power up and pickup, please set it not to blink. Reduce the current applied, verifying that at a value between 9% and 00% of the pickup TOC, the relay Pickup LED turns off or blinks if set to blink. START TIMER STOP SINGLE PHASE CURRENT SOURCE DIAC TYPE K Iin T T T T TOC Alarm KΩ 00 ma + /00 V DC POWER SUPPLY CURRENT LIMITED TO 00 ma Figure : 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 the curves can be found in Table : PICKUP TIMES FOR VARYING MULTIPLES OF PICKUP (MPU) on page. With the relay still connected as indicated in Figure : TOC ALARM UNIT TEST SETUP, set the time overcurrent unit to minimum pickup and set the corresponding time dial to. Successively apply currents of,, and 0 times pickup TOC, verifying that the operating times are within the margins indicated in Table : PICKUP TIMES FOR VARYING MULTIPLES OF PICKUP (MPU) - DIAC Type K Digital Overcurrent Relay GE Power Management

43 GEK-0 ACCEPTANCE/PERIODIC TESTS Table : PICKUP TIMES FOR VARYING MULTIPLES OF PICKUP (MPU) CURVE PICKUP TIMES (IN SECONDS) MPU MPU 0 MPU IAC. to.0.9 to.8.9 to. IAC. to.. to. 0.8 to 0.9 -ST 0.98 to to to 0.0 -MT 0.0 to. 8.8 to 9.. to. -LT (Type K). to..8 to to.90 -ST 0.8 to to to 0.0 IAC.9 to to to ST 0.89 to to to 0.0 IEEE Inverse.9 to.99.9 to.. to. IEEE Very Inverse. to.. to. 0. to 0. IEEE Extremely Inverse 8. to 9..8 to. 0. to 0. IEC Inverse. to..00 to..9 to. IEC Very Inverse.0 to.0. to to 0.8 IEC Extremely Inverse. to.. to. 0.9 to 0.0 Definite Time. to.. to.. to. I T. to to to 0.0 TD =. TOC / INSTANTANEOUS HDO UNIT INVERSE TIME The TOC/ Instantaneous HDO unit is designed similarly to a hinged armature instantaneous unit. a) PICKUP VERIFICATION Connect the relay as indicated in Figure : DIAC K TOC INVERSE TIME TEST SETUP. In order to apply current to the relay, use a 0/0 Hz voltage source, with a variable resistor in series, or an electronic current source. Set the TOC unit at the desired pickup and the Instantaneous HDO unit by setting the Instantaneous current pickup to lowest possible setting not including zero. This will allow the Instantaneous HDO unit to operate without affecting the TOC trip time which is coordinated with the Instantaneous HDO unit. Apply current to the relay and verify that the Pickup LED on the front of the relay lights between 98% and 0% of the pickup TOC setting. If the relay is set to blink between power up and pickup, please set it not to blink. Reduce the current applied, verifying that at a value between 9% and 00% of the pickup TOC, the relay Pickup LED turns off or blinks if set to blink. GE Power Management DIAC Type K Digital Overcurrent Relay -

44 ACCEPTANCE/PERIODIC TESTS GEK-0 START TIMER STOP To Test Seal-In Function SINGLE PHASE CURRENT SOURCE DIAC TYPE K Iin T T0 Target & Seal -in + /00 V DC POWER SUPPLY CURRENT LIMITED TO 00 ma T T Figure : DIAC K TOC INVERSE TIME 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 the curves can be found in Table : PICKUP TIMES FOR VARYING MULTIPLES OF PICKUP (MPU) on page. With the relay still connected as indicated in Figure : DIAC K TOC INVERSE TIME TEST SETUP, set the time overcurrent unit to minimum pickup and set the corresponding time dial to. Enable the Instantaneous HDO settings by setting the pickup to the lowest setting (not including zero). This allows the TOC function to operate without coordinating with the Instantaneous HDO unit. Successively apply currents of,, and 0 times pickup TOC, verifying that the operating times are within the margins indicated in Table : PICKUP TIMES FOR VARYING MULTIPLES OF PICKUP (MPU) on page.. TOC / INSTANTANEOUS HDO UNIT DEFINITE TIME For the Definite Time Characteristics, based on any current input, the time should be half of the maximum value. a) VERIFICATION OF TIME DIAL Set the relay at the minimum pickup TOC and verify that with an input current of five times (x) pickup TOC, the operating time is between the margins shown in Table : PICKUP TIMES FOR VARYING TIME DIALS. - DIAC Type K Digital Overcurrent Relay GE Power Management

45 GEK-0 ACCEPTANCE/PERIODIC TESTS Table : PICKUP TIMES FOR VARYING TIME DIALS CURVE PICKUP TIMES (IN SECONDS) FOR TIME DIAL SETTINGS 0 IAC. to.0. to to.0 0. to 0. IAC. to.0.8 to to to ST 0.9 to to to to 0.0 -MT. to 9..0 to.. to.8.8 to.980 -LT (Type K).9 to.. to. 0. to..0 to.88 -ST 0. to to to to 0.0 IAC.80 to.0.0 to. 0. to to 0. 9-ST 0.90 to to to to 0.0 IEEE Inverse.08 to.0.0 to to.0 0. to 0.8 IEEE Very Inverse.90 to..9 to to to 0.0 IEEE Extremely Inverse. to.8. to.8 0. to to 0.9 IEC Inverse.9 to..9 to.0. to. 0. to 0.8 IEC Very Inverse.00 to.0.0 to. 0.9 to.0 0. to 0.9 IEC Extremely Inverse.90 to.8.09 to to to 0. Definite Time 9. to 0.. to..8 to. 0.9 to.0 I T 0.0 to to to to 0.00 MPU = X.8 INSTANTANEOUS HDO UNIT The instantaneous HDO unit will react differently depending on how the signal is applied. If the signal is applied suddenly with no prefault current, the operating time will be longer. If a prefault current is applied prior to the fault the operating time will be shorter. The following test determines that the instantaneous unit is working correctly and confirms the operating time for faults applied with no prefault current. Connect the relay as shown in Figure : DIAC K TOC INVERSE TIME TEST SETUP on page. Set the instantaneous unit pickup to Amps (for the Amp rated relay) or 0. Amps (for the Amp rated relay) with a zero IOC delay setting. Also set the TOC pickup to its lowest setting not including zero. This allows the Instantaneous HDO unit to function without coordinating with the TOC unit. Apply Amps (for the Amp rated relay) or. Amps (for the Amp rated relay) and measure the operating time. The operating time should be between ms and ms. This time is subject to dependent on the multiple of pickup current and the fault incidence angle. A graph of how the instantaneous unit varies as a function of input current is provided for reference in Figure : IOC CURVE FOR THE HDO INSTANTANEOUS UNIT on page 9. GE Power Management DIAC Type K Digital Overcurrent Relay -

46 ACCEPTANCE/PERIODIC TESTS GEK-0.9 STANDARD INSTANTANEOUS UNIT Connect the relay as shown in Figure : DIAC TYPE K INSTANTANEOUS UNIT TEST SETUP. The standard instantaneous unit is designed to use one of several coils. Table : PICKUP TIMES FOR VARYING TIME DIALS lists the pickup range, continuous current ratings and short time ratings of each of these coils. START TIMER STOP SINGLE PHASE CURRENT SOURCE DIAC TYPE K Iin T T T T Target + /00 V DC POWER SUPPLY CURRENT LIMITED TO 00 ma Figure : DIAC TYPE K INSTANTANEOUS UNIT TEST SETUP Table : PICKUP TIMES FOR VARYING TIME DIALS RANGE SUB-RANGE SERIES OR PARALLEL CONTINUOUS RATINGS SECOND 0. to.0 0. to.0 SERIES to.0 PARALLEL to.0.0 to 8.0 SERIES to.0 PARALLEL to to 0.0 SERIES to 80.0 PARALLEL to to 80.0 SERIES to 0.0 PARALLEL Higher currents I may be applied for shorter lengths of time t in accordance with the formula: I = K , K = constant t - DIAC Type K Digital Overcurrent Relay GE Power Management

47 GEK-0 ACCEPTANCE/PERIODIC TESTS.0 PERIODIC TESTS It is recommended that the user perform a periodic test to verify that the relay is operating properly. It is recommended that a portion of the acceptance tests be performed to verify the relay. An inspection of the seal-in contacts can be performed by removing the relay from its case and visually inspecting the contacts for corrosion.. 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 investment in repair/test equipment and in technical expertise, and usually results in a longer down time than if a spare relay were used in its place, while the unit is shipped back to the factory. GE Power Management DIAC Type K Digital Overcurrent Relay -

48 ACCEPTANCE/PERIODIC TESTS GEK-0 Figure : REAR, FRONT, AND TOP VIEWS OF THE DIAC TYPE K INTERIOR -8 DIAC Type K Digital Overcurrent Relay GE Power Management

49 GEK-0 ACCEPTANCE/PERIODIC TESTS Figure : DIAC K FRONT AND REAR VIEWS GE Power Management DIAC Type K Digital Overcurrent Relay -9

50 ACCEPTANCE/PERIODIC TESTS GEK-0-0 DIAC Type K Digital Overcurrent Relay GE Power Management

51 GEK-0 GEK-0 SPECIFICATIONS SPECIFICATIONS. BURDENS Burdens for the over-current units are listed in Table : BURDEN SETTINGS. Burdens decrease with increasing current above minimum setting, due to the power supply shunting in the power supply circuit. Since the power supply is the major portion of the burden, the burden for a given input current will be constant, irrespective of pick-up settings on both TOC and IOC units. Table : BURDEN SETTINGS BURDEN at MINIMUM SETTING BURDEN IN Ω (Z) at MULTIPLES OF MINIMUM PICKUP UNIT RANGE Hz R jx Z x 0x 0x 00x A 0. / A 0. / Current Range: 0. to.9 A ( Amp Relays) 0. to.8 A ( Amp Relays) Burden in VA 0 AMP Model AMP Model BURDENS: 0.A / 0. A unit 0. VA.0A /.0 A unit. VA Figure : BURDEN CURVE GE Power Management DIAC Type K Digital Overcurrent Relay -

52 SPECIFICATIONS GEK-0. RATINGS FREQUENCY System Frequency 0/0 Hz CURRENT (A OR A MODELS) Table : MAXIMUM PERMISSIBLE CURRENT TRANSIENT OVERREACH Maximum Transient Overreach % CONTACT RATINGS Table : MAXIMUM PERMISSIBLE CURRENT A MODEL A MODEL Continuous A A Voltage Cont. Make & Carry sec Break Max. Load seconds 0 A 0 A second 00 A 00 A Table : OPERATING CURRENT RANGE DC resistive DC inductive L/R=0 ms V 0V V 0V 0V 0A 0A 0. A 0. A 0 A 0A 0. A 0. A 0.0 A 0 W 0 V A MODEL A MODEL minimum 0.09 A 0. A I T (constant) ENVIRONMENTAL AMBIENT TEMPERATURE Storage: 0 to +8 C Operation: to +0 C Humidity: Up to 9% without condensing INSULATION WITHSTAND TESTS Impulse Voltage: KV peak,./0 µs, 0. Joules per IEC-, Class III SURGE WITHSTAND CAPABILITY Fast Transient: Per ANSI C Per IEC 0-- Oscillatory: Per ANSI C Per IEC - RADIO FREQUENCY WITHSTAND MHz to GHz, keyed every MHz for seconds Per ANSI C.90. Per IEC 0-- ELECTROSTATIC DISCHARGE Per IEC 0-- NOTE: The DIAC Type K relay must be powered up at least once per year to avoid deterioration of electrolytic capacitors and subsequent relay failiure. - DIAC Type K Digital Overcurrent Relay GE Power Management

53 APPENDIX A APPENDIX A REVISIONSA. CHANGE NOTES Table A : REVISION HISTORY A. CHANGE NOTES A.. REVISION HISTORY A MANUAL P/N DIAC K REVISION RELEASE DATE ECO GEK GEK-0A GEK-0B SPDV0.A0 November, GEK-0C SPDV0.A0 November, 000 DIACK-00 Table A : ADDITIONS/CHANGES TO DGP MANUAL GEK-0C A.. ADDITIONS/CHANGES TO DIAC K MANUAL PAGE IN GEK-0B cover ADDITION/CHANGE (to GEK-0C) Updated GE contact information and manual part number. Moved warning concerning electrolytic capacitor deterioration to the SPECIFICATIONS chapter. - Updated Figure - to reflect the correct taps for A and 0. A. GE Power Management DIAC Type K Digital Overcurrent Relay A-

54 A. CHANGE NOTES APPENDIX A A A- DIAC Type K Digital Overcurrent Relay GE Power Management

55 INDEX Numerics TOC CURVE... - TOC CURVES... - SHORT TIME TOC CURVES... - MEDIUM TIME TOC CURVES... - LONG TIME TOC CURVES... - SHORT TIME TOC CURVES TOC CURVES SHORT TIME TOC CURVES A ACCEPTANCE TESTS description... - drawout relays... - instantaneous HDO unit... - instantaneous unit test setup... - pickup times for TOC alarm unit... - pickup times for TOC/ instantaneous HDO unit... -, - visual inspection... - ACCPETANCE TESTS inverse time... - ADJUSTMENTS digital units... - standard instantaneous unit... - APPLICATION... - B BLOCK DIAGRAM... - BURDEN curve... - data... - settings... - specifications... - C CALCULATION OF SETTINGS... - CASE... - COVER INSTALLATION... - CURRENT maximum permissible... - operating range... - CURVES see TOC curves EXTERNAL CONNNECTIONS FOR MOTOR PROTECTION - F FEATURES... - FRONT VIEW... - FRONT VIEW OF DIAC K FUNCTIONAL BLOCK DIAGRAM... - H HANDLING... - HARDWARE DESCRIPTION... - I IT TIME CURVE...-8 IAC TOC CURVE... - IAC TOC CURVES... - IAC TOC CURVES IEC EXTREMELY INVERSE TOC CURVES...- IEC INVERSE TOC CURVES...- IEC VERY INVERSE TOC CURVES...- IEEE EXTREMELY INVERSE TOC CURVES...- IEEE INVERSE TOC CURVES...- IEEE VERY INVERSE TOC CURVES...- INDICATORS... - INSTALLATION... - INSTANTANEOUS HDO UNIT testing... - INTERIOR VIEWS OF DIAC K INTERNAL CONNECTIONS DIAGRAM... - INTERNAL/EXTERNAL CONNECTIONS... - INTRODUCTION... - INVERSE TIME TEST... - IOC CURVE FOR HDO INSTANTANEOUS UNIT...-9 IOC CURVE FOR STANDARD (EM) INSTANTANEOUS UNIT...-0 M MANUAL TRIP CIRCUIT TEST... - MAXIMUM PERMISSIBLE CURRENT... - MECHANICAL INSPECTION... - MOTOR PROTECTION CHARACTERISTIC CURVE... - MOUNTING... - D DEFINITE TIME... - DRAWOUT RELAYS testing... - E ENVIRONMENT... - ENVIRONMENTAL SPECIFICATIONS... - O OPERATING COIL TAPPING... - OPERATING CURRENT RANGE... - ORDER CODES... - ORDERING... - P PANEL MOUNTING AND DRILLING... - GE Power Management DIAC Type K Digital Overcurrent Relay i

56 INDEX PERIODIC TESTS...-, - POINTER STYLES... - PRODUCT DESCRIPTION... - R RATINGS...-, - RATINGS OF TARGET AND SEAL-IN COIL... - REAR VIEW OF DIAC K RECEIVING... - RESET TARGETS... - REVISION HISTORY... A- S SELECTION GUIDE... - SERVICING... - SETTING RANGE... - SPECIFICATIONS... - STANDARD (EM) INSTANTANEOUS UNIT...-9 STORAGE... - SURGE GROUND... - TESTS see ACCEPTANCE TESTS and PERIODIC TESTS TIME OVERCURRENT CURVES see TOC CURVES TOC / INSTANTANEOUS HDO UNIT DEFINITE TIME.- TOC / INSTANTANEOUS HDO UNIT INVERSE TIME..- TOC ALARM UNIT...- TOC CURVES short time...- medium time...- long time...- short time short time...-0 IAC...- IAC...- IAC...-9 IEC extremely inverse...- IEC inverse...- IEC very inverse...- IEEE extremely inverse...- IEEE inverse...- IEEE very inverse...- TOC FUNCTIONS...- TRIP CIRCUIT...- T TARGET AND SEAL-IN UNIT... - TARGETS... - V VISUAL INSPECTION...- ii DIAC Type K Digital Overcurrent Relay GE Power Management

57 NOTES GE Power Management DIAC Type K Digital Overcurrent Relay

58 GE POWER MANAGEMENT WEBSITE The latest product information for the DIAC K relay is available on the Internet via the GE Power Management home page: JVVRYYY)'KPFWUVTKCNEQORO This site provides access to the following customer services: Digital Products Directory A brief description of products can be viewed online. Product Catalog Individual product brochures can be downloaded and printed Product Selector Guide A graphical tool for finding the product you are interested 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 available in either AutoCAD, CorelDRAW, or PDF formats. Order Codes Order codes for many products can be downloaded and printed Technical Publications Papers related to power management Much more is also available. Visit us online at DIAC Type K Digital Overcurrent Relay GE Power Management

59 NOTES GE Power Management DIAC Type K Digital Overcurrent Relay