A method for rejuvenating a strand-blocked cable having a conductor comprised of a plurality of conductor strands with interstitial volume therebetween blocked by a PIB based mastic, the conductor being surrounded by a polymeric cable insulation. The method comprising installing injection adapters that seal the cable ends of the cable and are usable to inject fluid into the interstitial volume between the conductor strands of the cable; elastically expanding the polymeric cable insulation through the application of pressure to the interstitial volume between the conductor strands of the cable; and injecting at least one injection fluid in which the PIB based mastic is mostly insoluble into the interstitial volume between the conductor strands of the cable.
H02G 1/16 - Methods or apparatus specially adapted for installing, maintaining, repairing, or dismantling electric cables or lines for repairing insulation or armouring of cables
H01B 7/285 - Preventing penetration of fluid into conductor or cable by completely or partially filling interstices in the cable
H01B 7/282 - Preventing penetration of fluid into conductor or cable
H01B 7/28 - Protection against damage caused by external factors, e.g. sheaths or armouring by moisture, corrosion, chemical attack or weather
H01B 13/32 - Filling or coating with impervious material
A method for rejuvenating a strand-blocked cable having a conductor comprised of a plurality of conductor strands with interstitial volume therebetween blocked by a PIB based strand-block mastic, the conductor being surrounded by a polymeric cable insulation. The method including pre-injection of compressed gas into the conductor strands of the cable at a pressure less than the elastic limit of the cable insulation, and injection of a rejuvenation fluid into the conductor strands of the cable at a pressure less than the elastic limit of the cable insulation.
H01B 7/28 - Protection against damage caused by external factors, e.g. sheaths or armouring by moisture, corrosion, chemical attack or weather
H01B 7/285 - Preventing penetration of fluid into conductor or cable by completely or partially filling interstices in the cable
H01B 13/00 - Apparatus or processes specially adapted for manufacturing conductors or cables
H01B 13/32 - Filling or coating with impervious material
H02G 1/16 - Methods or apparatus specially adapted for installing, maintaining, repairing, or dismantling electric cables or lines for repairing insulation or armouring of cables
An assembly for harvesting power from one or more power cables and providing the harvested power to a remotely installed electronic device, the assembly comprising: a current transformer operable to harvest power from the one or more power cables and output the harvested power to the remotely installed electronic device; at least one output monitor each operable to encode, in a load signal, at least one property of a portion of the harvested power that passed through the remotely installed electronic device; and a controller operable to receive the load signal from each of the at least one output monitor and control an amount of power harvested by the current transformer based at least in part on the load signal received from each of the at least one output monitor.
H02J 11/00 - Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed or converted
H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
A method for rejuvenating a strand-blocked cable having a conductor comprised of a plurality of conductor strands with interstitial volume therebetween blocked by a PIB based mastic, the conductor being surrounded by a polymeric cable insulation. The method comprising installing injection adapters that seal the cable ends of the cable and are usable to inject fluid into the interstitial volume between the conductor strands of the cable; elastically expanding the polymeric cable insulation through the application of pressure to the interstitial volume between the conductor strands of the cable; and injecting at least one injection fluid in which the PIB based mastic is at least partially soluble into the interstitial volume between the conductor strands of the cable. To facilitate elastic deformation of the polymeric cable insulation, the cable may be heated to and maintained at a temperature of T1 above ambient during the injection.
H02G 1/16 - Methods or apparatus specially adapted for installing, maintaining, repairing, or dismantling electric cables or lines for repairing insulation or armouring of cables
H01B 7/285 - Preventing penetration of fluid into conductor or cable by completely or partially filling interstices in the cable
H01B 7/28 - Protection against damage caused by external factors, e.g. sheaths or armouring by moisture, corrosion, chemical attack or weather
37 - Construction and mining; installation and repair services
Goods & Services
Construction, maintenance, repair and specialty services,
namely, rehabilitating underground electric distribution
cable systems by rejuvenating existing cable through
introduction of silicon based restorative; rehabilitating
underground electric distribution cable systems by
rejuvenating existing cable through introduction of water
blocking material; construction, maintenance, repair and
specialty services, namely, removing existing underground
electric distribution cable systems; construction,
maintenance, repair and specialty services, namely,
installing new underground electric distribution cable and
ancillary equipment.
37 - Construction and mining; installation and repair services
Goods & Services
Construction, maintenance and repair services, namely,
restoring and replacing power distribution and
telecommunication cable systems including the introduction
of a silicon based restorative and/or water blocking
material into the strands of the power cable and a silicon
based water blocking material into the telecommunication
cable.
37 - Construction and mining; installation and repair services
Goods & Services
(1) Construction, maintenance and repair services, namely, restoring and replacing power distribution and telecommunication cable systems; Construction, maintenance and repair services, namely, restoring and replacing power distribution and telecommunication cable systems via the introduction of a silicon based restorative and water blocking material into the strands of the power cable and a silicon based water blocking material into the telecommunication cable
37 - Construction and mining; installation and repair services
Goods & Services
(1) Construction, maintenance, repair and specialty services, namely, rehabilitating underground electric distribution cable systems by rejuvenating existing cable through introduction of silicon based restorative; rehabilitating underground electric distribution cable systems by rejuvenating existing cable through introduction of water blocking material; construction, maintenance, repair and specialty services, namely, removing existing underground electric distribution cable systems; construction, maintenance, repair and specialty services, namely, installing new underground electric distribution cable and ancillary equipment.
9.
SILANE FUNCTIONAL STABILIZERS FOR EXTENDING LONG-TERM ELECTRICAL POWER CABLE PERFORMANCE
Provided are methods for extending the life of in-service electrical cable having polymeric insulation, comprising injecting into the cable a dielectric gel formulation containing: (a) Si-H endblocked polydiorganosiloxane (H(R2SiO)x(R2Si)H); (b) polydiorganosiloxane endblocked with unsaturated carbon-carbon functionality; (c) hydrosilylation catalyst suitable to cure (a) and (b); and (d) at least one organoalkoxysilane functional additive (e.g., anti-oxidant-based alkoxysilane, voltage stabilizer-based alkoxysilane, hindered amine light stabilizer (HALS)-based alkoxylsilane, UV absorber-based alkoxysilane, etc.), wherein (a) and (b) are cured post-injection into a non-flowable gel, and wherein (d) diffuses into the insulation. The methods may further comprise a hydrolysis/condensation catalyst compatible with the hydrosilylation catalyst so as not to interfere with the cure of (a), (b) and (c), and/or be compatible with optional siloxane crosslinkers, and/or with optional hydrosilylation inhibitors.
Provided are methods for extending the life of in-service electrical cable having polymeric insulation, comprising injecting a dielectric enhancement fluid composition into the cable, wherein the composition comprises: (a) one or more organoalkoxysilane functional additives (voltage stabilizer-based, hindered amine light stabilizer (HALS)-based, and/or UV absorber-based); and (b) a catalyst suitable to catalyze hydrolysis and condensation of (a), the injected composition providing for rapid initial permeation of (a) into the insulation, and extended retention of subsequent condensation products of (a) in the insulation. Additionally provided are innovative silyl functional ferrocenes (e.g., containing a ferrocene moiety and a silyl function hydrolysable to silanol) having utility as functional voltage stabilizing additives in the methods.
B05D 5/12 - Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
A tank including a fluid reservoir, a communication module, a controller, and at least one sensor. The fluid reservoir is configured to be in fluid communication with a cable segment. The communication module is configured to communicate with an external device. The sensor is configured to detect an injection parameter value, encode the injection parameter value in a sensor signal, and send the sensor signal to the controller. The controller is configured to automatically instruct the communication module to transmit information to the external device based on the injection parameter value.
A hose for use with a blower and an underground vault. The hose surviving an explosion initiated inside the underground vault. The hose is blast-resistant, arc-flash-resistant, and fire-resistant. A first end of the hose is connectable to the blower and configured to receive fresh air from the blower when connected thereto. The hose conducts the fresh air to a second end of the hose. The second end is positionable inside the underground vault wherein the fresh air provides sufficient breathable air to any personnel present in the underground vault.
A method configured to be executed by a system controller. The method includes obtaining a first metric from a first sensor installed in a first underground vault of a system of interconnected underground vaults, and obtaining a second metric from a second sensor installed in a second underground vault of the system. The first and second underground vaults are in fluid communication with one another via one or more connections. The method also includes locating a gas source based at least in part on one or both of the first and second metrics, and performing an action. The action includes identifying the gas source to one or more users and/or altering a rate of atmospheric turnover in at least a portion of the system.
An insert for constructing a cable accessory used to inject a fluid into a cable. The cable accessory has an outer body defining an interior configured to house a conductor of the cable. The outer body includes an injection port with an internal channel configured to receive the fluid. The insert has first and second portions. The first portion is configured to line a portion of the interior of the cable accessory. The first portion has a first through-channel configured to allow the conductor of the cable to pass therethrough. The second portion is configured to line the internal channel of the injection port. The second portion has a second through-channel in fluid communication with the first through-channel. The insert is less permeable to the fluid than the outer body of the cable accessory. The insert may be molded into the outer body.
H01B 7/28 - Protection against damage caused by external factors, e.g. sheaths or armouring by moisture, corrosion, chemical attack or weather
B05B 5/12 - Plant for applying liquids or other fluent materials to objects specially adapted for coating the interior of hollow bodies
B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
B29C 73/00 - Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass
H01B 3/20 - Insulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils
H01B 7/17 - Protection against damage caused by external factors, e.g. sheaths or armouring
A system including a processor and sensor for installation inside an underground vault. The sensor monitors a parameter inside the vault and sends a monitoring signal to the processor. Based on the monitoring signal, the processor may provide data to a memory for storage and/or control signals to an interface for transmission to an external device located within the vault. The control signals instruct the external device to modify the environment inside the vault. The sensor may be positioned inside an enclosure, which is inside a housing. An air moving device moves air into or out of the enclosure thereby drawing air from the vault into the enclosure before the sensor monitors the parameter. A heat generating component may be positioned inside the housing and when generating heat prevents moisture from condensing therein. The system may include a power unit that draws power from a power source inside the vault.
Manhole or vault ventilation systems consisting of metal and
non-metal manhole covers, with or without a water control
design feature to divert water away from the manhole, and an
exhaust pipe, with or without an exhaust fan, to remove
combustible gases from manholes and vaults.
A system for use with a manhole vault having an internal atmosphere, and, optionally, with a ventilation stack connecting the vault to an external atmosphere. The system includes a manhole cover, a ventilation pipe, and an air moving assembly. The cover has one or more through-holes extending between top and bottom surfaces. Each of the through-hole(s) is in fluid communication with the external atmosphere at the top surface. The pipe has a through-channel that extends between first and second openings. The first opening is positioned proximal to either an opening into the ventilation stack or at least one of the through-hole(s) at the bottom surface of the cover. The second opening is positioned in the interior of the vault. The device is configured to cause a portion of one of the interior and external atmospheres to flow through the through-channel toward a different one of the interior and external atmospheres.
A system for circulating air inside a manhole vault. The system includes an air-moving device in fluid communication with the manhole vault and configured to circulate the air inside the manhole vault to prevent a concentration of combustible gasses or to enhance cooling therein.
The charge value of a partial discharge pulse in an electrical cable is provided by analyzing the frequency spectrum of the propagated pulse in a spectrum analyzer 21 to generate sets of spectrum signals, each including a magnitude and a frequency of a component of the pulse. A laptop computer has a processor, receives the spectrum signals, and has one or more application computer programs operable to perform the calculations of Equations 2-6, finds the bandwidth and energy of the spectrum signals from which the computer programs derive unknown time domain parameters including the maximum value of the pulse and the time interval of the pulse at half its maximum value. With those parameters, the program reconstructs a time domain signal of the pulse and integrates that signal to provide the charge value of the partial discharge.
A capacitor component (18, 22) is adapted for capacitive coupling to an electrical power apparatus (15) in which a PD is suspected, such as a shielded power cable (15); and an impedance transformance device (102) has an input side connected directly to the capacitor component (18, 22). Together the two components are used as a sensor (100) to pick up and convey PD signals to a PD signal-analyzing system (D). Although the two components inherently form a classic high-pass RC filter, in accordance with the invention the input impedance at the capacitor side is much greater than the output impedance at the signal-analyzing system side. The effect is to pass much more of the lower frequency components of the PD signal for analysis by the PD signal-analyzing system (D) than if the transformance device (102) were not included.
G01R 31/12 - Testing dielectric strength or breakdown voltage
G01R 31/02 - Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection
G01R 27/26 - Measuring inductance or capacitanceMeasuring quality factor, e.g. by using the resonance methodMeasuring loss factorMeasuring dielectric constants
21.
SYSTEM FOR ANALYZING AND LOCATING PARTIAL DISCHARGES
A sensor (12) detects partial discharges (PDs) in an electrical power system and generates a corresponding analog electrical signal. A data acquisition component (14) receives the signal from the sensor (12) and converts it to digitized zero span data (22) for a series of uniformly spaced frequencies in a frequency spectrum of interest. A digital signal processing component (16) receives the digitized zero span data, analyzes such data, and generates a corresponding phase resolved spectrum signal in three dimensional format including dimensions of amplitude, phase and frequency for each of the uniformly spaced frequencies. A display component (18) receives the analyzed data stream from the processing component and actuates one or more displays from which characteristics of the PD can be identified, such as different types of PDs from different sources, and information on the location of a PD relative to the sensor.
Data acquisition systems and methods for acquiring test data associated with standard insulated power cables and/or power equipment such as switchgears, transformers, electric motors, etc are disclosed. The test data may then be subsequently analyzed for defects, such as the presence of faults, discharges (e.g., PD, coronas, arcing, etc.). The systems may store the acquired test data on removable, non volatile memory, such as Flash memory. The removable memory may be retrieved by an un-skilled technician periodically and returned to a lab or other test facility for subsequent analysis by highly trained analysts.
A connector or similar apparatus for connecting or terminating at least one cable or cable section is provided. The connector includes at least one stepped cavity for receiving a cooperatingly sized and configured stepped conductor end of the cable or cable section. The stepped cavity includes two or more adjoining cavity sections of decreasing diameter. After insertion of the stepped conductor end of the cable or cable section into the stepped cavity, the cable or cable section may be affixed to the connector via crimping or other suitable coupling techniques. Prior to insertion, the stepped conductor end is cleaned so as to remove oxidation, dirt and debris, and/or strand fill, etc.
H01R 4/18 - Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one anotherMeans for effecting or maintaining such contactElectrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
H01R 24/38 - Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
H01B 11/18 - Coaxial cablesAnalogous cables having more than one inner conductor within a common outer conductor
A number of TDR systems and testing methods are provided that improve the quality and accuracy of information collected when propagating a signal along a length of cable in order to pinpoint specific anomalies. One or more of the TDR systems includes, for example, a computing device, a pulse generator, and at least one capacitive test sensor. The at least one capacitive test sensor transmits/receives pulses to/from a power system component, such as an insulated power cable, in a capacitive manner.
G01R 31/08 - Locating faults in cables, transmission lines, or networks
G01R 27/26 - Measuring inductance or capacitanceMeasuring quality factor, e.g. by using the resonance methodMeasuring loss factorMeasuring dielectric constants
25.
ACID-CATALYZED DIELECTRIC ENHANCEMENT FLUID AND CABLE RESTORATION METHOD EMPLOYING SAME
A dielectric enhancement fluid composition having at least one organoalkoxysilane and an acid catalyst having a pKA less than about 2.1 and a method for using the composition to enhance the dielectric properties of an electrical cable having a central stranded conductor encased in a polymeric insulation and having an interstitial void volume in the region of the conductor, the method comprising at least partially filling the interstitial void volume of the cable with the composition. The fluid composition may further include an organometallic catalyst and a corrosion inhibitor.
B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
B05D 5/12 - Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
26.
COMPOSITION AND METHOD FOR RESTORING AN ELECTRICAL CABLE AND INHIBITING CORROSION IN THE ALUMINUM CONDUCTOR CORE
Composition and method for enhancing the dielectric strength of an in-service solid dielectric shielded electrical cable and preventing corrosion of a central aluminum conductor of the cable by supplying the cable with an alkoxysilane composition. In one embodiment, the alkoxysilane composition includes dimethyldi(n-butoxy)silane.
B05D 5/12 - Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Maintenance assessment and diagnostic services, namely, an on-line at system voltage assessment of the performance and reliability of electrical transmission and distribution power cable systems.
28.
SWAGABLE HIGH-PRESSURE CABLE CONNECTORS HAVING IMPROVED SEALING MEANS
A high-pressure connector for an electrical power cable section having a central stranded conductor encased in a polymeric insulation jacket and having an interstitial void volume in the region of the stranded conductor, the high-pressure connector being suited for confining a fluid within the interstitial void volume at a residual pressure above atmospheric, but below the elastic limit of the polymeric insulation jacket, the high-pressure connector comprising a housing having a wall defining an interior chamber configured to be in fluid communication with the interstitial void volume and an end portion sized to receive the insulation jacket within the interior chamber and to overlap at least a portion of the insulation jacket at an end thereof with the cable section extending from the housing end portion and at least a portion of the stranded conductor positioned within the interior chamber. The housing wall of the housing end portion has an engagement portion comprised of a swagable material to secure the housing wall to the insulation jacket in fluid-tight sealed engagement therewith upon inward swaging of the engagement portion of the housing wall of the housing end portion to the insulation jacket to confine the fluid at the residual pressure within the interior chamber and the interstitial void volume. The housing includes at least one axially-projecting engagement member located within the interior chamber at the engagement portion of the housing wall of the housing end portion.
A computer simulation method is disclosed for simulating an electrical cable having a stranded conductor surrounded by a conductor shield encased in an insulation jacket and having an interstitial void volume in the region of the conductor injected with a fluid composition comprising at least one dielectric enhancement fluid component so as to at least partially fill the interstitial void volume at an initial time. The simulation method comprises for a selected length of the simulated cable, defining a plurality of radially arranged finite volumes extending the selected length of the simulated cable, and estimating the radial temperature of each finite volume. For a selected time period after the initial time, performing a series of steps at least once and outputting or otherwise using the value of the new concentration for the dielectric enhancement fluid component within each finite volume.
An improved method for imparting excellent long-term dielectric performance to an in-service electrical cable section having a stranded conductor surrounded by a conductor shield encased in a polymeric insulation and having an interstitial void volume in the region of the conductor, the cable section having an average operating temperature T. The method comprising injecting a dielectric enhancement fluid composition into the interstitial void volume, the composition comprising at least one component selected from: (1) a water-reactive material selected from an organosilane monomer, the above organosilane monomer wherein at least one of the water-reactive groups has been substituted with a condensable silanol group, an oligomer oligomer of the above organosilane monomer, or a co-oligomer of the above organosilane monomer, the organosilane monomer having a diffusion coefficient at least about 15 times greater than the diffusion coefficient of its corresponding tetramer; (2) a water-reactive material similar to (1) having at least one group attached to silicon comprising 7 to about 20 -CH2- units; (3) a non-water-reactive organic material which has a diffusion coefficient of less than about 10-9 cm2/sec and an equilibrium concentration of at least about 0.005 gm/cm3 in the polymeric insulation, the above mentioned diffusion coefficients and equilibrium concentration being determined at temperature T; or (4) an organic compound having an equilibrium concentration in the polymeric insulation at 55°C which is less than 2.25 times the equilibrium concentration at 22°C.
