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Overview
- 15/25kV, 600 Amp rating
- Designed for in-air applications (pad-mounted, vault-type, submersible transformers, switchgear)
- Molded epoxy construction with stainless steel flange
- Overall Length: 13.75 inch, Diameter: 4.50 inch
- Includes one factory-installed 5/8-11 UNC-2A stud; additional stud sold separately. Includes boot and collar.
Specifications
Application | In-Air Applications |
Connection Type | 5/8-11 UNC-2A Stud |
Current Rating | 600 A |
Material | Molded Epoxy Body and Stainless Steel Flange |
Material | Molded Epoxy with Stainless Steel Flange |
Mounting Type | Pad-Mounted or Vault-Type or Submersible Transformers or Switchgear |
Series | K650TBC |
Size | Overall Length 13.75 inch, Diameter 4.50 inch |
Special Features | Conductive Shield made of Molded Conductive EPDM makes Positive Ground Contact with EPDM Flange of Bushing Insert. Stainless Steel Flange Resists Corrosion and can be Externally Clamped or Welded to Apparatus |
Standard | ANSI/IEEE Standard 386 |
Temperature Rating, Maximum | 149 F |
Temperature Rating, Maximum | 65 C |
Temperature Rating, Minimum | -40 F |
Temperature Rating, Minimum | -40 C |
Type | Deadbreak Bushing |
Voltage Rating | 15/25kV |
Package Dimensions (L x W x H) | 0.01 IN x 0.01 IN x 0.01 IN |
Package Dimensions (L x W x H) | 0.0254 cm x 0.0254 cm x 0.0254 cm |
Package Weight (Imperial) | 6.3000 L |
Package Weight (Metric) | 2.8580 kg |
K675TBC
15/25kV, 900 Amp, Deadbreak Bushing for In-Air Applications (Pad-Mounted or Vault-Type or Submersible Transformers or Switchgear). One Factory installed 5/8-11 UNC-2A Stud included, other Stud must be Purchased Separately. Overall Length 13.75 inch, Diameter 4.50 inch. Molded Epoxy with Stainless Steel Flange. Boot and Collar.
K1601-PC-S2R
15/25kv, Short Shank Well without Bail Tabs and with Replaceable Well Stud (2-3/4 inch Bushing Shank Length)
K1601-PC-S2
15/25kv, Short Shank Well without Bail Tabs and Non-Replaceable Well Stud (2-3/4 inch Bushing Shank Length), side mount
600-BC
Boot and Collars for K600T1, designed for In-Air Applications of 15 or 25 kV, 600/900 Amp Apparatus Bushings.
L1601-PC-S1R
35kv, Short Shank Well with Bail Tabs and with Replaceable Well Stud (2-3/4 Bushing Shank Length)
K1601-PC-T2
15/25kv, Long Shank Well Without Bail Tabs and Non-Replaceable Well Stud (9-1/4 inch Bushing Shank Length), top mount
K1601-PC-T1
15/25kv, Long Shank Well with Bail Tabs and Non-Replaceable Well Stud (9-1/4 inch Bushing Shank Length)Frequently Asked Questions
What interfaces are compatible with K650TBC bushings?
K650TBC/K675TBC series bushings universally accept Elastimold 600A/900A Elbow or bushing extender interfaces.
What material is required for K675TBC connections?
The K675TBC is built with copper for 900A capability, requiring all associated products, including the cable's conductor, to be copper.
How is the bushing mounted to apparatus?
The stainless steel flange allows for external clamping or welding to the apparatus.
How do I specify the connection material when ordering?
When ordering for in-air application through 25kV, specify whether an aluminum or all copper connection is desired.
Is a removable stud well design available?
Yes, the bushing well is also available in a removable stud well design, designated as "-R".
What is the continuous current rating?
The continuous current rating for these bushings is 600 Amps.
What are the current ratings for K650TBC and K675TBC?
The K650TBC is rated for 600A (aluminum), and the K675TBC is rated for 900A (copper).
What is the impulse withstand rating?
The impulse withstand rating is 125kV BIL (1.2 x 50 microsecond wave).
What standards do these bushings meet?
These bushings meet ANSI/IEEE Standard 386, Latest Revision.
What materials are the bushings constructed from?
The bushings are molded of epoxy and feature a stainless steel flange.
How to Weld ELASTIMOLD Apparatus Bushings and Bushing Wells
This guide provides recommended procedures for welding ELASTIMOLD apparatus bushings and bushing wells. It emphasizes minimizing heat to maintain the integrity of the epoxy and outlines necessary preparations and safety measures.
Estimated time: 1h
Tools needed:
Inert-gas, tungsten-arc welding (TIG) equipment, Short-arc welding (metal inert-gas, MIG) equipment, Thermocouple detectors, Burr removal tools, Cleaning supplies
Supplies needed:
No. 308 bare stainless steel wire, Copper heat sinks, Thermally conductive paste, HV insulated cap(s) or connector(s)
- Ensure Safety and Inspect Components
De-energize all apparatus before beginning any installation or removal. Inspect all apparatus bushings and bushing wells for damage, correct rating, and compatibility with mating parts. Check the package contents to ensure they are complete and undamaged. Verify that all components fit properly with the cable and/or mating products.
- Prepare Mounting Area
Ensure the clearance between the epoxy shank and the mounting hole is 3/16” ± 1/16”. Confirm the enclosure cover thickness is 1/4” maximum; consult the factory if it exceeds this. Remove all burrs from the mounting hole and finish with a 1/16” radius. If the product is supplied with protective shipping covers, remove them and replace with appropriate HV insulated caps or connectors.
- Clean Work Surfaces and Control Environment
Keep all surfaces (tank, bushing, and bushing well) clean and free from contamination like paint or grease. Contamination will extend welding time and raise temperature, affecting bushing integrity. Minimize air currents in the welding area to prevent disturbance of the gas atmosphere.
- Set Up Heat Sinks
Obtain copper heat sinks (water-cooled or non-water-cooled) to minimize heat flow to the epoxy during welding. Apply thermally conductive paste to the face of the heat sinks that will be in contact with the flange and cover. Ensure venting is provided for the heat sinks. Position the bottom heat sink to be of a larger diameter than the top to maximize heat absorption away from the tank. Do not thread heat sinks to the bushing or bushing well stud to prevent integrity issues from expansion.
- Prepare Welding Equipment
Prepare your welding equipment for either Inert-gas, tungsten-arc welding (TIG) or Short-arc welding (metal inert-gas, MIG), using No. 308 bare stainless steel wire. Have thermocouple detectors ready to monitor temperatures at critical points during welding.
- Perform Welding and Monitor Temperature
Perform the welding process, keeping heat to an absolute minimum to protect the epoxy. Ensure the visible heat line from welding does not exceed 1/8” from the weld or 3/16” from the O.D. of the flange. Continuously monitor temperatures at critical points using thermocouple detectors, ensuring they do not exceed 225°F.
- Handle Post-Welding Cooling and Connections
Minimize forces applied to the heated stud and flange both before and after welding. If using non-water-cooled heat sinks, remove them promptly after welding and air cool the bushing to prevent heat from flowing back. Do not apply any torque to the epoxy when making bus bar connections.
- Final Checks and Curing
Observe all critical clearances from the apparatus connection to enclosure stiffeners and adjacent ground planes. Ensure the oil level covering the immersed stud connection is greater than 2 inches. If the equipment requires thermal baking to cure its finish, ensure the bake sequence does not exceed 130°F or 8 hours. During any curing process, do not mechanically load the bushing metallic contacts internally or externally to prevent epoxy distortion.
Frequently Asked Questions about ABB - Installation Products
How are Thomas and Betts products typically installed?
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What are the main product lines offered by Ocal?
Ocal offers a comprehensive range of corrosion-resistant conduit systems, including PVC-coated conduit and fittings, conduit bodies, hazardous location fittings, and strut accessories. Their products are designed to provide superior corrosion protection, featuring a hot-dipped galvanizing process and UL listed Type 4X PVC-coated conduit bodies, ensuring durability in the most demanding environments.