Group fusing is generally used for protecting pole-mounted distribution capacitor racks. In this type of application, the fuse links are installed in cutouts and mounted on a cross arm above
The capacitors (unless they are internally fused) in NEPSI''s Metal-Enclosed Power Capacitor Banks are individually fused to protect against case rupture and to provide capacitor isolation due to dielectric and non-dielectric capacitor
Fusing per the Code provides reasonable protection if the capacitors are the metallized film self-healing type. If not, each capacitor should be individually fused as
When a capacitor fails, the energy stored in its series group of capacitors is available to dump into the combination of the failed capacitor and fuse. The failed capacitor and fuse must be able to
The capacitors (unless they are internally fused) in NEPSI''s Metal-Enclosed Power Capacitor Banks are individually fused to protect against case rupture and to provide capacitor isolation due to dielectric and non-dielectric capacitor faults. In addition to case rupture concerns, fuses are sized to withstand transient inrush currents associated
The new HHA-BC current-limiting "Back-Up" rated series fuse line has been designed for optimum capacitor circuit protection for the North American market meeting requirements for indoor and
Stress specific to the protection of capacitor banks by fuses, which is addressed in IEC 60549, can be divided into two types: Stress during bank energization (the inrush current, which is very high, can cause the fuses to age or blow) and Stress during operation (the presence of harmonics may lead to excessive temperature rises).
Group fusing is generally used for protecting pole-mounted distribution capacitor racks. In this type of application, the fuse links are installed in cutouts and mounted on a cross arm above the capacitor rack. The main purpose of the fuse on a capacitor rack is to clear a fault if a capacitor unit or any of the accessories fail.
The use of Eaton''s Cooper PowerTM series X-LimiterTM fuse (Catalog Section 240-56) as a direct-connected capacitor fuse (particularly for indoor and/or enclosed banks), provides a full-range current-limiting fuse requiring a minimum of mounting space for a smaller low cost package.
The use of Eaton''s Cooper PowerTM series X-LimiterTM fuse (Catalog Section 240-56) as a direct-connected capacitor fuse (particularly for indoor and/or enclosed banks), provides a full
The new HHA-BC current-limiting "Back-Up" rated series fuse line has been designed for optimum capacitor circuit protection for the North American market meeting requirements for indoor and outdoor usage. The HHA-BC capacitor fuse voltage rating is equal to or greater than the maximum open circuit voltage that the system
This document provides information on the selection of Medium Voltage Current Limiting Fuses for the protection of Single-Phase Wye-Connected Capacitors utilized in Metal Enclosed Capacitor Banks. Maximum continuous current the fuse will see during normal operation.
This document provides information on the selection of Medium Voltage Current Limiting Fuses for the protection of Single-Phase Wye-Connected Capacitors utilized in Metal Enclosed
When a capacitor fails, the energy stored in its series group of capacitors is available to dump into the combination of the failed capacitor and fuse. The failed capacitor and fuse must be able to absorb or hold off this energy with a low probability of case rupture of the capacitor unit.
Outdoor current-limiting capacitor fuse, for voltage classes of 2.8, 5.5, 8.3, 15.5 and 23 kV, 8-80 A. For fusing individual capacitor units in standard outdoor equipment, 8 kV, 15/20 kV and 25
Outdoor current-limiting capacitor fuse, for voltage classes of 2.8, 5.5, 8.3, 15.5 and 23 kV, 8-80 A. For fusing individual capacitor units in standard outdoor equipment, 8 kV, 15/20 kV and 25 kV, 100 A. High-energy capability fuse for use in outdoor capacitor banks with many parallel capacitor units. 5.5-18.2 kV, 15-43 A.
This catalog describes Eaton''s Cooper Power series bus-mounted expulsion type capacitor fuse which provides highly reliable, economical protection for capacitor banks where medium
This catalog describes Eaton''s Cooper Power series bus-mounted expulsion type capacitor fuse which provides highly reliable, economical protection for capacitor banks where medium-energy-interrupting ability is required.
The main purpose of the fuse on a capacitor rack is to clear a fault if a capacitor unit or any of the accessories fail. The fuse must clear the fault quickly to prevent any of the equipment from failing violently and to assure continuous operation of the rest of the system (the unfaulted portion).
The fuse protecting the capacitor is chosen such that its continuous current capability is equal to or greater than 135% of rated capacitor current for grounded-wye connected racks, and 125% for ungrounded-wye racks. This overrating includes the effects of overvoltage, capacitor tolerance, and harmonics.
For shunt capacitor applications, the energy is equal to 3.19 joules per kVar. The available energy is then compared to the rating of the fuse and capacitor unit. This is one criteria for selecting either expulsion or current-limiting fuses for a given application. If the parallel energy is above 20 kJ or 6000 kVar, we apply current-limiting fuses.
Either of these two effects can impede the proper operation of the fuse. In the event of a capacitor fault, excess current will flow through the fuse of the faulted unit. This current causes the fuse element to melt and vaporize. An arc will form across the vaporized section within the fuse tube.
Capacitor current-limiting fuses can be designed to operate in two different ways. The COL fuse uses ribbons with a non-uniform cross section. This configuration allows the fuse to be used to interrupt inductively limited faults. The pressure is generated by the arc contained in the sealed housing.
Over the years, a set of terms has been developed to apply capacitor fuses. The concept of applying fuses should be a simple engineering task; however, fuse operation is a non-linear function. The resistance of fuse elements changes non-linearly as they melt and clear.
We are deeply committed to excellence in all our endeavors.
Since we maintain control over our products, our customers can be assured of nothing but the best quality at all times.