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ABB - Installation Products 771B20GAD - 35 kv, 600 Amp, Deadbreak Grounding Device. Ground Clamp Connection has 20mm Diameter Ball.

ABB Installation Products 771B20GAD 35 kv, 600 Amp, Deadbreak Grounding Device. Ground Clamp Connection has 20mm Diameter…

UPC: 075114262101


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Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The ABB 771B20GAD is a 35 kV, 600 A deadbreak grounding device designed for underground electrical systems with fault currents exceeding 10 kA. This Elastimold® grounding-aid device (GAD) provides a permanent, direct grounding connection rated for 25 kA short-circuit withstand, eliminating the need for temporary grounding adapters or additional equipment. The device installs directly in the rear interface of a 600 A series elbow connector (T-body), enabling faster system restoration and reducing installation time and costs. Key features include a removable protective cap with an integral capacitive test point for verifying de-energized circuits, fully hot-stick workable design, and compatibility with both straight and ball receptacles for ground clamp flexibility. The 20mm diameter ball clamp ensures a secure, high-contact-area connection. Available in 15 kV, 25 kV, and 35 kV system classes, the 771B20GAD is constructed with full copper for optimal conductivity and reliability in critical grounding applications. SKU: 771B20GAD.
  • 35 kV, 600 A deadbreak grounding device for underground systems
  • 25 kA short-circuit withstand rating with full copper construction
  • 20mm diameter ball clamp for secure, high-contact-area grounding
  • Removable protective cap with capacitive test point for circuit verification
  • Hot-stick workable design for safe, remote installation and maintenance

Specifications

Amperage Rating
600 A
Application
35 kV, 600 Amp
Conductor Material
Copper , EPDM Rubber
Connection
Push-In
Connection Type
Ground Clamp
Connection Type
Deadbreak Grounding
Current Rating
600 A
Insulation
EPDM Rubber
Length
11.56 in
Size
20mm Diameter Ball
Size
20mm Ball
Special Features
20mm Diameter Ball
Standard
ANSI/IEEE Standard 386
Type
Grounding Device Ball Type
Voltage Rating
35 kV
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)
1.0000 L
Package Weight (Metric)
0.4540 kg
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Frequently Asked Questions

What is the voltage rating of the 771B20GAD?

The ABB 771B20GAD Deadbreak Grounding Device is rated for 35 kV.

What is the current rating for this grounding device?

The 771B20GAD has a current rating of 600 Amps.

What is the size of the ball on the ground clamp connection?

The ground clamp connection on the 771B20GAD features a 20mm diameter ball.

Who manufactures the 771B20GAD grounding device?

The 771B20GAD is manufactured by ABB - Installation Products.

How to Install the 771B20GAD Deadbreak Grounding Device and 776BGADDR Insulated Cap

Install the 771B20GAD Deadbreak Grounding Device and the 776BGADDR Insulated Cap with Test Point onto a 600Amp elbow. This guide covers cleaning, lubrication, connection, torque specifications, and grounding wire attachment for high voltage electrical apparatus.

Tools needed:

Torque Wrench, 1” Hex Deep Socket, Hotstick

Supplies needed:

Lubricant (supplied with product), No. 14 AWG (2.5mm2) Copper Wire

  1. Ensure Safety and Inspect Components

    Before beginning, ensure all apparatus is de-energized. This product must be installed by competent personnel trained in high voltage safety. Inspect all components for damage, proper rating, and compatibility with mating parts. Read all instructions thoroughly and have all required tools ready. DO NOT SUBSTITUTE the supplied lubricant.

  2. Connect the 771B20GAD Grounding Device

    Clean and lubricate the 771B20GAD Grounding Connector and the 600Amp elbow interface with the supplied lubricant. Insert the 771B20GAD Grounding Connector into the elbow and rotate clockwise to engage the stud. Using a 1” deep socket and a torque wrench, continue rotating clockwise until the connector stops, then tighten to 55-60 ft/lbs torque. Remove the socket. Attach one end of a No. 14 AWG copper wire through the grounding eye, twist tightly, and connect the other end to the system ground.

  3. Prepare Insulating Cap Grounding Wire

    Insert a length of No. 14 AWG (2.5mm2) copper wire through the grounding eye of the 776BGADDR insulated cap. Make a small loop and twist tightly, ensuring not to damage the grounding eye. Connect the free end of this grounding wire to the system ground. Ensure the wire length is sufficient to reach the grounding point and wrap around the insulated cap approximately 10 times (90 inches) during the next installation step.

  4. Mount the 776BGADDR Insulating Cap

    Clean and lubricate the 776BGADDR insulating cap and the 771B20GAD interface with the supplied lubricant. Using two hotsticks, attach the first to the cap's assembly/disassembly bail and push the cap onto the bushing interface. With the second hotstick, engage the prepared grounding wire, establish slight tension, and wrap it loosely around the cap's center. While pushing with the first hotstick, rotate clockwise until threads engage. Continue turning without pushing until resistance is felt. Install with a hotstick only, applying a maximum hand torque of 15 ft/lbs (20.3 Nm). DO NOT OVERTIGHTEN. Remove the second hotstick.

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