Abstract:
An isolator protection device can include a housing having at least one wail and a first coupling feature, where the at least one wall forms a cavity, where the first coupling feature is configured to couple to an arrester, and where the at least one wall is configured to house an isolator body of an isolator within the cavity. The isolator protection device can also include a securing device disposed within the cavity, where the securing device is configured to secure a stud of the isolator to the isolator body during normal operating conditions.
Abstract:
The disclosed concept relates to hollow core arrester membranes generally and, in particular, to membranes that include a pultruded tube composed of fibers and resin, and one or more wrap layers composed of fibers and resin in the form of a mat or fabric. The one or more wrap layers are applied to the pultruded tube to form a wrapped, pultruded tube, which is over molded with a polymer enclosure.
Abstract:
An arrester bypass device can include a switch having an normal state and an operated state. The arrester bypass device can also include a first electrode mechanically coupled to the switch, where the first electrode is held when the switch is in the normal state and released when the switch is in the operated state. The arrester bypass device can also include a second electrode positioned in line with the first electrode, wherein the first electrode contacts the second electrode when the switch is in the operated state. The arrester bypass device can further include a ground strap having a first end and a second end, where the first end is mechanically coupled to the plunger, and where the second end is mechanically coupled to an electrical ground.
Abstract:
A liquid immersed surge arrester that protects electrical equipment includes a module assembly. The module assembly includes at least one varistor and a pre-impregnated composite around the at least one varistor. The liquid immersed surge arrester also includes contacts on opposite ends of the module assembly with which the module assembly is connected to electrical equipment to be protected and to electrical ground. The liquid immersed surge arrester also includes a tank that houses the module assembly and the contacts. A fault-tolerant protection device for protecting electrical equipment includes a surge arrester to protect electrical equipment from damage during periods of voltage above a normal operating range. The fault-tolerant protection device also includes a surge durable fuse element to disconnect the surge arrester after failure of the surge arrester to allow unprotected operation of the electrical system.
Abstract:
A mechanical reinforcement for an electrical apparatus has at least one electrical element (115) with an outer surface (135) and a reinforcing structure (310) attached to the outer surface. The electrical element may be a monilithic MOV disk or a bonded MOV disk stack. The monolithic element may, for example, have a rating greater than 6 kV. The reinforcing structure may be pre-impregnated with resin. The machanical reinforcement provides improved high current durability to the electrical apparatus.
Abstract:
A liquid immersed surge arrester that protects electrical equipment includes a module assembly. The module assembly includes at least one varistor and a pre-impregnated composite around the at least one varistor. The liquid immersed surge arrester also includes contacts on opposite ends of the module assembly with which the module assembly is connected to electrical equipment to be protected and to electrical ground. The liquid immersed surge arrester also includes a tank that houses the module assembly and the contacts. A fault-tolerant protection device for protecting electrical equipment includes a surge arrester to protect electrical equipment from damage during periods of voltage above a normal operating range. The fault-tolerant protection device also includes a surge durable fuse element to disconnect the surge arrester after failure of the surge arrester to allow unprotected operation of the electrical system.
Abstract:
A station class surge arrester includes a module assembly. The module assembly includes at least one metal oxide varistor (MOV) disk and a pre-impregnated composite that is applied around the at least one MOV disk. The pre-impregnated composite is capable of withstanding an 80 kA fault current for 12 cycles. The station class surge arrester also includes contacts on opposite ends of the module assembly with which the module assembly is connected to electrical equipment to be protected and to electrical ground.
Abstract:
An isolator protection device can include a housing having at least one wall and a first coupling feature, where the at least one all forms a cavity, where the first coupling feature is configured to couple to an arrester, and where the at least one wall is configured to house an isolator body of an isolator within the cavity. The isolator protection device can also include a securing device disposed within the cavity, where the securing device is configured to secure a stud of the isolator to the isolator body during normal operating conditions.
Abstract:
A liquid immersed surge arrester that protects electrical equipment includes a module assembly. The module assembly includes at least one varistor and a pre-impregnated composite around the at least one varistor. The liquid immersed surge arrester also includes contacts on opposite ends of the module assembly with which the module assembly is connected to electrical equipment to be protected and to electrical ground. The liquid immersed surge arrester also includes a tank that houses the module assembly and the contacts. A fault-tolerant protection device for protecting electrical equipment includes a surge arrester to protect electrical equipment from damage during periods of voltage above a normal operating range. The fault-tolerant protection device also includes a surge durable fuse element to disconnect the surge arrester after failure of the surge arrester to allow unprotected operation of the electrical system.