| Brand | Wone Store |
| Model NO. | Power Fuses |
| Rated voltage | 34.5kV |
| Mounting type | Vertical-Offset Mounting |
| Rated interrupting current | 17.5kA |
| Series | SMD |
SMD Power Fuses provide reliable, economical protection for transformers and capacitor banks in outdoor substations through 138 kV. They incorporate precision-engineered nondamageable silver or nickel-chrome fusible elements with time-current characteristics that are precise and permanently accurate — assuring not only dependable performance, but also continued reliability of system coordination plans.
With SMD Power Fuses, source-side devices may be set for faster operation than practical with other power fuses or circuit breakers, thereby providing better system protection without compromising coordination.
features：
SMD Power Fuses are offered with maximum continuous current ratings through 300E amperes, in a variety of fault-interrupting ratings. They’re available in a wide range of ampere ratings, in three different speeds: Standard, Slow, and Very Slow. So they can be readily coordinated with protective relays, circuit reclosers, and other fuses. This broad selection of ampere ratings and speeds permits close fusing to achieve maximum protection and optimum coordination.
application:
Transf ormer Protect ion with SMD Power Fuses
High-voltage power fuses provide a reliable and economical means to protect small to midsize load transformers installed in utility and industrial substations. The considerable economies inherent in power-fuse protection are possible because the fuse itself is much less costly than other types of protective equipment. There also is no need for auxiliary equipment, such as station batteries, motor-driven operators, and protective relays.
Capacitor Bank Protect ion with SMD Power Fuses
SMD Power Fuses are suitable for fusing of station capacitor banks, particularly where available fault currents are high. These power fuses have a substantial continuous peak-load capability
that permits the use of smaller ampere ratings than may be possible with other makes of power fuses, without risking nuisance fuse operations caused by capacitor-bank inrush or outrush currents. Close fusing with SMD Power Fuses ensures rapid isolation of faulted capacitor banks, thereby protecting the system from unnecessary outages.
Technology parameters：
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ABB Vacuum Contactor KC2 Power Supply System Technical Transformation PlanIssue OverviewThe 10kV air compressor starting system of a company utilizes the ABB vacuum contactor KC2 as the control component for the operating circuit. The dedicated wide-voltage power supply module paired with this contactor presents the following issues:Frequent failures: The power supply module fails to properly transition the voltage from 300V to 12V, resulting in fuse blowouts.Poor heat dissipation: Enclosed installation of the module leads to insufficient heat dissipation, accelerWone Store09/13/2025 -
Solution for Medium-Voltage Motor Control and Protection Using Vacuum Contactor-Fuse (VCF) in a Coal Conveying SystemProject BackgroundA coal conveying system comprises 15 belt conveyors driven by medium-voltage motors. The system operates under complex conditions, with motors often subjected to heavy loads and frequent starts. To address these challenges and achieve effective control and reliable protection during motor startup, the project comprehensively adopts Vacuum Contactor-Fuse (VCF) combination devices for the 6kV medium-voltage motor power distribution. This solution details the technical features,Wone Store09/13/2025
