Isolating switches and make-and-break switches
Electrical apparatus for switching or protecting electrical circuits, or for making connections to or in electrical circuits (for example, switches, fuses, lightning arresters, voltage limiters, surge suppressors, plugs and other connectors, junction boxes), for a voltage exceeding 1,000 volts. > Automatic circuit breakers: > Isolating switches and make-and-break switches
Duty Rate (from China)
Subheadings
Products classified under Tariff item 8535.30.00
12kV Oil-Immersed Knife Switch
The 12kV oil-immersed knife switch is designed for immersion in transformer oil, providing superior arc quenching for high-voltage applications. Its blade mechanism ensures reliable make-and-break above 1,000V in oil-filled enclosures, classifying it under tariff item 8535.30.00.
15kV Gang-Operated Air Break Knife Switch
The 15kV gang-operated air break knife switch is used in overhead power distribution lines to isolate sections of the circuit. It features multiple blades that open and close simultaneously for safe make-and-break operations above 1,000V, falling under tariff item 8535.30.00.
24kV Hook-Operated Distribution Knife Switch
The 24kV hook-operated knife switch is designed for pole-mounted distribution transformers, allowing ground crew operation. It features weatherproof porcelain insulators for outdoor service above 1,000V, classifying it under tariff item 8535.30.00.
27kV Single-Phase Hookstick Knife Switch
The 27kV single-phase hookstick-operated knife switch is used for manual operation from ground level in utility substations. The hookstick design allows pole-top disengagement for safe circuit isolation above 1,000V, falling under tariff item 8535.30.00.
38kV Vertical-Break Center-Rotating Knife Switch
The 38kV vertical-break knife switch features a center-rotating blade mechanism for transmission line sectionalizing. It provides a high-visibility open position for voltages exceeding 1,000V in outdoor installations, classifying it under tariff item 8535.30.00.
4.16kV Pad-Mount Knife Switch
The 4.16kV pad-mounted knife switch is designed for underground residential distribution vaults. It features a tamper-resistant design with a visible blade position for voltages exceeding 1,000V, classifying it under tariff item 8535.30.00.
5kV Three-Phase Side-Break Knife Switch
The 5kV three-phase side-break knife switch is designed for indoor metal-clad switchgear applications. The side-mounted blade operation provides visible break confirmation for circuits exceeding 1,000V, classifying it under tariff item 8535.30.00.
7.2kV Double-Break Gang Knife Switch
The 7.2kV double-break gang-operated knife switch provides two interruption points per phase for enhanced safety. It is used in industrial substations for reliable isolation above 1,000V, classifying it under tariff item 8535.30.00.
ABB OT40F3 Isolating Switch
The ABB OT40F3 is a 3-pole isolating switch rated for 40A at voltages exceeding 1,000V, used in industrial electrical panels to safely disconnect circuits for maintenance. It falls under tariff item 8535.30.00 as an isolating switch for high-voltage circuits.
Cutler-Hammer CHHV Load Break Switch
The Cutler-Hammer CHHV series provides load-make/break isolation up to 600A at 15kV for mining and crane applications. These high-voltage make-and-break switches are classified under tariff item 8535.30.00.
Eaton Magnum DS Isolating Switch
The Eaton Magnum DS series provides robust make-and-break isolation for medium voltage systems up to 7,500V with a 400A rating. These high-voltage disconnect switches are essential for substation maintenance and fall under tariff item 8535.30.00.
GE Powerbreak II Isolator
The GE Powerbreak II ML-400A isolators are designed for 2.4-38kV systems in utility applications, with fused or non-fused options. These high-voltage make-and-break switches are classified under tariff item 8535.30.00.
L&T HPL Series Disconnect Switch
The L&T HPL series includes heavy-duty porcelain-clad isolating switches for 11kV outdoor substations, rated at 200A continuous. These high-voltage make-and-break disconnectors fall under tariff item 8535.30.00.
Schneider Electric NW40 Isolating Switch
The Schneider Electric NW40 is a load-break rotary isolating switch for 40A applications in 1,000-6,500V power distribution systems. It is classified under tariff item 8535.30.00 for its make-and-break functionality in high-voltage environments.
Siemens 3KL Load Isolator Switch
The Siemens 3KL series motor isolators handle 63A at voltages over 1,000V for industrial motor control circuits. These high-voltage make-and-break isolating switches meet the criteria for tariff item 8535.30.00.