Three-Phase Air Insulated Switches

Overview

The ABB portfolio of GridGuard gang-operated loadbreak

sidebreak switches is one of the most robust product offerings

in the industry today. Standard quality features include a 1/4"

steel phase base, stainless steel to brass bearings, silverplated

copper reverse loop contacts, and silver-plated copper

busbar blades. These features contribute to an extended

service life of the unit and provide superior harsh environment

endurance. Coupled with the above are expulsion tube and

enclosed vacuum bottle interrupting device options. Both types

of interrupters provide superior performance by utilizing leading

edge technology to safely interrupt loads up to 1500 A at 35 kV,

with minimal environmental effect and no adverse circuit impact.

Application

ABB GridGuard switches are ideally suited for the following duties:

– Line switching: parallel or loop switching load splitting, load

dropping, and associated charging currents

– Transformer switching: load dropping, including associated

magnetizing currents

– Cable switching: parallel or loop load switching, load

dropping, and associated charging currents

Switches include five, three, and two-time duty-cycle faultclosing

capabilities of 15 kA, 20 kA, and 30 kA rms-asym

respectively. High quality manufacturing and construction

techniques have produced the “best of class” as proven by

certified third-party testing agencies.

Standard features

Robust construction:

– Resilient, higher BIL silicone rubber insulators

– Dead end angles constructed of 3/8" steel, meets Federal

Specification BR-C-271 Type 7, Class 3

– Reverse loop silver plated copper jaw contacts

– All ferrous components are hot dip galvanized

– Tinned copper terminal pads

– Maintenance free stainless steel to brass bearings

Reliable design:

– Looped contact design improves contact integrity

– Interrupter contact operating speed is independent of switch

operating speed, ensuring full loadbreak capability

– All copper construction is grade C110, providing high

conductivity and strength

– Self-resetting interrupter

– Advanced shunt design eliminates contact pitting

– Unitized construction: galvanized steel or fiberglass

– Visible break allows for safe operation and maintenance

– Tested in accordance with IEC 60265-1 (1998), 265-1 (1983),

60507 (1991), ANSI/IEEE 1247 (1998), 37.34 (1994), C37.32

(1996), ASTM B117-7, A153, D4329, and G154-06

– RUS accepted

Voltage class 15 kV 27 kV 38 kV

Nominal voltage (kV) 15 25 35

Max voltage (kV) 17 27 38

BIL (kV BIL) 125 170 200

Leakage distance (mm) 521 818 1115

Continuous

current (A)

600 A (ANSI), 900 A (IEEE) *

900 A (ANSI)

1200 A (ANSI) **

Fault close

15.1 kA rms-asym: 5 x manual operation

20.2 kA rms-asym: 3 x manual operation

30.1 kA rms-asym: 2 x manual operation

Momentary withstand

(3 second):

IEEE 37.34 (1994)

600 A

900 A

1200 A

Momentary withstand

(10 cycle):

ANSI C37.32 (1996)

600 A

900 A

1200 A

Insulator type

Silicone

Porcelain

Interrupter type

Expulsion tube: 2,500 open and close operations

Vacuum bottle: 5,000 open and close operations

Crossarm type

Galvanized steel: 2,000 lbs/phase

Fiberglass: 1,000 lbs/phase

Mounting

configurations

Horizontal (upright, extra clearance, or underarm)

Vertical (phase over phase)

Riser (vertical)

Delta (pole top)

Control

mechanism

Hookstick

Reciprocating control rod

Torsional control rod

Motor operator

Ice breaking ." (manual operation)

Mechanical Tested up to 5,000 cycles (open/close)

Specifications

* GridGuard switches are ANSI rated switches. The GridGuard Ax6xxxxx is rated 600 A

continuous current per the ANSI C37.30 temperature rise test requirements and rated 900

A continuous current per the IEEE 1247 temperature rise test requirements. The GridGuard

Ax9xxxxx is rated 900 A continuous current per the ANSI C37.30 temperature rise test requirements.

The GridGuard Ax1xxxxx is rated 1200 Amps continuous current per the ANSI C37.30

temperature rise test requirements. Momentary current ratings (10 cycle) are:

Ax6xxxx 600 A (ANSI C37.30) = 40 kA

Ax9xxxx 900 A (ANSI C37.30) = 51 kA

Ax1xxxx 1200 A (ANSI C37.30) = 70 kA

** Vacuum interrupter required for load interruption.