Table of Contents
Related Manuals for GE GEK-45404F
Summary of Contents for GE GEK-45404F
- Page 1 Click here to get to our homepage: http://www.gemultilin.com/ MULTILIN TYPES IAV, 51 D 52 C GE Power Management INSTRUCTIONS OVERVOLTAGE RELAYS GEK-45404F GE Power Management 205 Great Valley Parkway Malvern, PA 19355, USA...
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Page 2: Table Of Contents
DESCRIPTION ... 3 APPLICATION... 4 RATINGS... 5 BURDENS ... 6 OPERATING CHARACTERISTICS ... 8 CONSTRUCTION ... 9 RECEIVING, HANDLING, AND STORAGE ... 10 RECEIVING... 10 HANDLING ... 10 STORAGE... 10 ACCEPTANCE TESTS... 10 VISUAL INSPECTION ... 10 MECHANICAL INSPECTION... 11 ELECTRICAL TESTS ... -
Page 3: Description
These are single-phase, sensitive overvoltage relays of the induction disk construction. They are equipped with a time dial so as to provide adjustable time delay in their operation. The relays are principally applicable for sensitive overvoltage ground detection for high-impedance grounded generators or for ungrounded power systems. -
Page 4: Application
These are single-phase, sensitive, time-delay overvoltage relays. They are principally applicable for sensitive overvoltage ground detection for high-impedance grounded generators or for ungrounded power systems. These relays all have a capacitor in series with the operating coil. For the IAV51K and IAV52K relays, this capacitor is external to the relay because of its large size. -
Page 5: Ratings
broken delta voltage will therefore be three times the normal delta phase-to-phase voltage with no fault. The operating-circuit ratings available are shown in Table I. The operating coil will stand rated voltage continuously on any tap. RELAY IAV51D IAV51K IAV52C IAV52D IAV52K The current-closing rating of the contacts is 30 amperes for voltage not exceeding 250 volts. -
Page 6: Burdens
such that the tripping current does not pass through the contacts of the target and seal-in coil of the protective relay. Burdens for the various relay types are give in Tables IIIA and B. RELAY VOLTAGE TYPES RATING 1AV51D IAV51D IAV52D IAV51D IAV51K... - Page 7 50 - Cycle Burdens at Rated Voltages RELAY VOLTAGE TYPES RATING IAV51D IAV51K IAV52K IAV52C **Minimum pickup volts RELAY VOLTAGE TAP**SETTINGS TYPES RATINGS 1AV51D A(10) B(15) C(25) D(40) IAV51D A(16) IAV52D B(24) C(40) D(64) IAV51D A(28) B(42) C(70) D(112) IAV51K A(5.4) IAV52K B(7.5)
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Page 8: Operating Characteristics
RELAY VOLTAGE TAP**SETTINGS TYPES RATINGS 1AV51D A(10) B(15) C(25) D(40) IAV51D A(16) B(24) C(40) D(64) IAV51D A(28) B(42) C(70) D(112) IAV51K A(5.4) IAV52K B(7.5) C(12.5) D(20) No Taps IAV52C No Taps No Taps **Minimum pickup volts OPERATING CHARACTERISTICS The Type IAV51D relay is a low-pickup voltage relay normally used for ground fault protection on AC rotating machines. -
Page 9: Construction
The IAV52K relay is similar to the IAV51K except that it has two, instead of one, normally-open contacts. The IAV52C is a low-pickup, time-overvoltage relay with two normally-open contacts. It has a seal- in element. It has a capacitor connected in series with the operating coil but, unlike the IAV51D relay, it does not have a tapped resistor connected in series with the operating coil. -
Page 10: Receiving, Handling, And Storage
GEK-45404 RECEIVING, HANDLING, AND STORAGE RECEIVING These relays, when not shipped as a part of a control panel, will be shipped in cartons designed to protect them against damage. Immediately upon receipt of the relay, an examination should be made for any damage sustained during shipment. -
Page 11: Mechanical Inspection
GEK-45404 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 the auxiliary brush be bent high enough to engage the connecting plug or test plug before the main brushes do. This will prevent Current Transformer (CT) secondary circuits from being opened. -
Page 12: Electrical Tests
ELECTRICAL TESTS 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 steel case. In this way any magnetic effects of the enclosure will be accurately duplicated during testing. -
Page 13: Installation
GEK-45404 INSTALLATION INSPECTION At the time of installation, the relay should be inspected for tarnished contacts, loose screws, or other imperfections. If any trouble is found, it should be corrected; see MAINTENANCE. Check the nameplate for model number and rating. LOCATION The location should be clean and dry, free from dust and excessive vibration, and well lighted to facilitate inspection and testing. -
Page 14: Adjustments
ADJUSTMENTS Target and Seal-in Unit For trip coils operating on current ranging from 0.2 up to 2.0 amperes at the minimum control voltage, set the target and seal-in tap plug in the 0.2- ampere tap. For trip coils operating on currents ranging from 2 to 30 amperes at the minimum control voltage, place the tap plug in the 2.0-ampere tap. -
Page 15: Time Setting
GEK-45404 Time Setting The time of operation of the overvoltage relay is determined primarily by the setting of the time dial. Further adjustment is obtained by moving the permanent magnet along its supporting shelf; moving the magnet in toward the back of the relay decreases the time, while moving it out increases the time. Fig. -
Page 16: Contact Cleaning
GEK-45404 CONTACT CLEANING For cleaning fine silver contacts, a flexible burnishing tool should be used. This consists of a flexible strip of metal with an etched roughened surface, resembling in effect a superfine file. The polishing action is so delicate that no scratches are left, yet corroded material will be removed rapidly and thoroughly. -
Page 17: List Of Illustrations
FIG. 1 (8043181) TYPE IAV51D RELAY, REMOVED FROM CASE, FRONT VIEW FIG. 2 (8043182) TYPE IAV51D RELAY, REMOVED FROM CASE, REAR VIEW FIG. 3 (K6400439-5) INTERNAL CONNECTIONS OF THE TYPE FRONT VIEW FIG. 4 (0362A514-3) INTERNAL CONNECTIONS OF THE TYPE IAV51K RELAY, FRONT VIEW FIG. - Page 18 GEK-45404 FIG. 1 (8043181-0) TYPE IAV51D RELAY, REMOVED FROM CASE, FRONT VIEW...
- Page 19 GEK-45404 FIG. 2 (8043182-0) TYPE IAV51D RELAY, REMOVED FROM CASE, REAR VIEW...
- Page 20 GEK-45404 FIG. 3 (K-6400439-5) INTERNAL CONNECTIONS OF THE TYPE IAV51D RELAY, FRONT VIEW...
- Page 21 GEK-45404 FIG. 4 (362A514-3) INTERNAL CONNECTIONS OF THE TYPE IAV51K RELAY, FRONT VIEW...
- Page 22 GEK-45404 FIG. 5 (K-6556505-0) INTERNAL CONNECTIONS OF THE TYPE IAV52C RELAY, FRONT VIEW...
- Page 23 GEK-45404 FIG. 6 (418A790-0) INTERNAL CONNECTIONS OF THE TYPE IAV52D RELAY, FRONT VIEW...
- Page 24 GEK-45404 FIG. 7 (0257A8379-0) INTERNAL CONNECTIONS OF THE TYPEIAV52K RELAY, FRONT VIEW...
- Page 25 GEK-45404 FIG. 8 (0275A2004-0) EXTERNAL CONNECTION DIAGRAM OF TYPES IAV51KAND IAV52K FOR GENERATOR GROUND-FAULT PROTECTION...
- Page 26 GEK-45404 FIG. 9 (0275A2003-0) EXTERNAL CONNECTION DIAGRAM OF TYPE IAV51D, IAV52C AND IAV52D FOR GROUND-FAULT DETECTION ON AN UNGROUNDED SYSTEM...
- Page 27 GEK-45404 FIG. 10 (K6154391-3) TEST CONNECTIONS FOR OVERVOLTAGE RELAYS...
- Page 28 GEK-45404 NOTE: TD=Time Dial setting FIG. 11 (0178A8140-0) TIME VOLTAGE CURVES FOR TYPES IAV51D, 51K, 52D, AND 52K RELAYS...
- Page 29 GEK-45404 FIG. 12 (8025039-0) CROSS SECTION OF DRAWOUT CASE SHOWING POSITION OF AUXILIARY BRUSH...
- Page 30 GEK-45404 FIG. 13 (0275A4399-0) OUTLINE OF IAV51K AND IAV52K EXTERNAL CAPACITOR...
- Page 31 GEK-45404 FIG. 14 (K6209270-2) OUTLINE AND PANEL DRILLING FOR RELAY TYPES IAV51D, 52D AND IAV52C...
- Page 32 GEK-45404 * FIG. 15 (K6209271-8) OUTLINE AND PANEL DRILLLING FOR RELAY TYPES IAV51K AND IAV52K...