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ABB ITH, Instruction Leaflet

The ABB ITH user manual is essential for seamlessly operating this cutting-edge product. Our comprehensive instruction leaflet provides step-by-step guidance, ensuring a hassle-free experience. Download your free manual from manualshive.com to unlock the full potential of the ABB ITH and optimize your usage.

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Courtesy of NationalSwitchgear.com

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Summary of Contents for ITH

Page 1: ...a small nut The adjustable core screw in the top of the frame provides the principal means for adjusting the current operating values A P P L I C A T I O N ITH relays may be utilized as overcurrent fault detectors or as instantaneous overcurrent trip units They are particularly suitable as fault detectors be cause of their 90 dropout ratio and because of their compact size It is recommended that t...

Page 2: ...O N A R Y CONTACTS 0 Fig 1 High Drop Out Instananeous Trip Unit ITH MOVING CONTACT PLUNGER S T E E L 0 Fig 2 Plunger Assembly for ITH Unit Fig 3 Indicating Contoctor Switch ICS 2 CORE SCREW Mm Courtesy of NationalSwitchgear com ...

Page 3: ...the case CHARACTERISTICS ITH Unit The ranges available for the instantaneous units are 0 25 0 5 0 5 1 0 1 2 2 4 4 8 6 12 8 16 and 16 32 amperes The unit has a nominal 2 to 1 range of pick up adjustment with a 90 or greater drop out ratio The core screw at the top of the unit is used to change the setting The maximum core screw setting is ten turns out from the fully bottomed position At the maximu...

Page 4: ...000 of trip value Continuous current rating of the coil is 2 times minimum pickup value One second rating is approximately 30 times min imum pick up o SETTINGS AND CALIBRATION ITH Unit The unit prior to shipment is adjusted for mini mum pick up value that is the lower value marked on the side of the frame The following procedure is used when changing this setting over the indicated range where a 9...

Page 5: ...main relay contacts and pass sufficient d c current through the trip circuit to close the con tacts of the contactor switch This value of current should not be greater than the rating of the contactor switch being used The operation indicator target should drop freely For Relays with Series Trip Thiscombination uses a 2 0 amp contactor switch and either a 1 0 amp or a 0 2 amp operation indicator c...

Page 6: ... _5 375 136 53 1 SMALL EXTERNAL TOOTHED WASHERS 190 32 SCREW SPACER OR SPACERS FOR THIN PANELS _ 250 6 35 f l 03l 4 1 031 26 19 26 19 0I6 397 250 n 6 35 0 L03I 4 1 031 4 26 9 26 19 4 1 1 375 9 53 R V PANEL 5 16 18 SCREW eq FOR THICK PANELS 150QI USE 5 16 18 STUDS 1 4 i M 1 0 yf 25 4 3 9 5 7 INTERNAL EXTERNAL TOOTHED WASHERS 8I3 46 05 I I 2 0 i i 50 8 190 32 SCREW FOR THICK PANELS USE 190 32 STUDS ...

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