US3590324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase comparison relaying network
Assignee: Westinghouse Electric Corp
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Filing: 1969-06-27
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Granted: 1971-06-29
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Expires: 1989-06-27
Abstract
Abstract A protective relaying apparatus especially useful in protecting a line section of a transmission line in which the line section has at least first and second terminals connected through first and second breaker switches to busses at first and second switching stations and in which operating information of the line section is transmitted between the first and second stations. The relaying apparatus at, at least the first station, embodies a pair of fault sensors in which a first thereof is actuated due to the occurrence of faults in at least that portion of the protected transmission line section and beyond and which sensor is effective to actuate the breaker switch associated therewith solely when the information supplied to the apparatus indicates the fault to be within the protected line section. The second fault sensor is actuated in response to the occurrence of faults which occur solely in a predetermined fractional portion of the protected line section and independently of the information supplied to the apparatus from any other station to actuate the adjacent breaker switch and to transmit information advising the second station of the actuation of the second fault sensor at the first station.
Inventors
- 👤 George D Rockefeller Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:52
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/26; H02H3/28; H02H3/30; H02H3/302; H02H7/00; H02H7/26; H02H7/261; H02H7/262
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
323 words
A protecting relay for a protected section of a transmission line which is connected to a source of power through an openable switch comprising, first and second fault sensing networks operable to be connected to the transmission line at a selected location, said first sensing network being operable to perform its function in response to the occurrence of faults solely in a first length of transmission line section to which the relay may be connected, said second sensing network being operable to perform its function in response to the occurrence of faults which occur at least in a second length of the transmission line section to which the relay may be connected, at least a portion of said second length being spaced from said selected location by said first length, a receiver operable to provide a first signal, a transmitter, a switch actuating device, first means connecting said switch actuating device to said first sensing network for actuation of said switch actuating device, said first means being rendered effective to actuate said switch actuating device solely as a consequence of the occurrence of said function of said first sensing network and independently of said signals, means providing a second signal, signal comparing means energized by said signals, second means connecting said switch actuating device to said second sensing network and including said signal comparing means, said second means being effective to actuate said switch actuating device in response to the occurrence of said function of said second sensing network solely at predetermined relationships of said signals, third means connecting said second sensing network to said transmitter and effective as a consequence of the occurrence of said function of said second sensing network to render said transmitter ineffective to transmit said signal, and fourth means connected to said transmitter and effective as a conSequence of the occurrence of said function by said first sensing network to render said transmitter ineffective to transmit said signal.
Claim 2
Dependent Claim
323 words
A protecting relay for a protected section of a transmission line which is connected to a source of power through an openable switch comprising, first and second fault sensing networks operable to be connected to the transmission line at a selected location, said first sensing network being operable to perform its function in response to the occurrence of faults solely in a first length of transmission line section to which the relay may be connected, said second sensing network being operable to perform its function in response to the occurrence of faults which occur at least in a second length of the transmission line section to which the relay may be connected, at least a portion of said second length being spaced from said selected location by said first length, a receiver operable to provide a first signal, a transmitter, a switch actuating device, first means connecting said switch actuating device to said first sensing network for actuation of said switch actuating device, said first means being rendered effective to actuate said switch actuating device solely as a consequence of the occurrence of said function of said first sensing network and independently of said signals, means providing a second signal, signal comparing means energized by said signals, second means connecting said switch actuating device to said second sensing network and including said signal comparing means, said second means being effective to actuate said switch actuating device in response to the occurrence of said function of said second sensing network solely at predetermined relationships of said signals, third means connecting said second sensing network to said transmitter and effective as a consequence of the occurrence of said function of said second sensing network to render said transmitter ineffective to transmit said signal, and fourth means connected to said transmitter and effective as a conSequence of the occurrence of said function by said first sensing network to render said transmitter ineffective to transmit said signal.
Claim 3
Dependent Claim
45 words
The combination of claim 1 in which delay means is provided in at least one of said third and said fourth means to delay the rendering of said transmitter ineffective by said one sensing network as a consequence of the occurrence of its said function.
Claim 4
Dependent Claim
15 words
The combination of claim 2 in which said delay means provides a 10 millisecond delay.
Claim 5
Dependent Claim
34 words
The combination of claim 2 in which means is provided to establish an alternating quantity and the delay provided by said delay means is not less than one-half the period of said alternating quantity.
Claim 6
Dependent Claim
100 words
The combination of claim 2 in which said transmitter is effective to transmit a third signal and a fourth signal, means is provided to maintain said transmitter in a condition to transmit said third signal in the absence of said function of either of said sensing network, said first means being effective in response to the occurrence of said function of said first sensing network to cause said transmitter to interrupt at least in part the transmission of said third signal and to provide transmission of said third signal and to provide transmission of said fourth signal during said interruption.
Claim 7
Dependent Claim
70 words
The combination of claim 5 in which means is provided to establish an alternating quantity, said first means is effective during the occurrence of said function of said first sensing network to interrupt said third signal and provide said fourth signal for alternate half periods of said alternating quantity, and in which the delay provided by said delay means is not less than a half period of said alternating quantity.
Claim 8
Dependent Claim
46 words
The combination of claim 1 in which means is provided to establish an alternating quantity, said transmitter is normally maintained ineffective to transmit a signal and said operating condition of said transmitter is the transmission of its said signal during alternate half periods of alternating quantity.
Claim 9
Dependent Claim
23 words
The combination of claim 1 in which said second sensing network is responsive to the magnitude of the fault current at said location.
Claim 10
Dependent Claim
25 words
The combination of claim 1 in which there is provided fifth means actuated by said first sensing device to render said transmitter ineffective to transmit.
Claim 11
Dependent Claim
14 words
The combination of claim 9 in which fifth means includes said switching actuating device.
Claim 12
Dependent Claim
311 words
A protective relay network for protecting a section of a transmission line having a first disconnecting switch arranged at one end of the line section comprising, a first actuating network operable to be connected to said line for receiving line operating signals, said first actuating network including a first line fault sensing device for actuation by said signals to detect faults in the line section at current magnitudes below a first magnitude and a second fault sensing device for actuation by said signals to detect faults in the line section at magnitudes solely greater than said first magnitude, said network also including an information transmitting device for communication with the protective network at the other end of the line section, said network further including an information receiving device and an information comparing device, said first actuating network further including means operatively interconnecting said first fault sensing device to said transmitting device for actuating said transmitting device into a condition to transmit first information and to supply information to said comparing device in response to the sensing of a line fault by at least one of said fault sensing devices, means connecting said receiving device to said comparing device for supplying information thereto, a tripping means, first circuit means operative connecting said second fault sensing device to said tripping means for actuation of said tripping means independently of said comparing means as a consequence of the occurrence of a fault in the line section, seconD circuit means operatively connecting said first fault sensing device to said tripping means for energization thereof and including said comparing device for energization of said tripping means solely at certain relationships of said supplied information, and third circuit means connected to said transmitter for interrupting the transmission of said first information as a consequence of the operation of either said first or said second fault sensing device.
Claim 13
Dependent Claim
311 words
A protective relay network for protecting a section of a transmission line having a first disconnecting switch arranged at one end of the line section comprising, a first actuating network operable to be connected to said line for receiving line operating signals, said first actuating network including a first line fault sensing device for actuation by said signals to detect faults in the line section at current magnitudes below a first magnitude and a second fault sensing device for actuation by said signals to detect faults in the line section at magnitudes solely greater than said first magnitude, said network also including an information transmitting device for communication with the protective network at the other end of the line section, said network further including an information receiving device and an information comparing device, said first actuating network further including means operatively interconnecting said first fault sensing device to said transmitting device for actuating said transmitting device into a condition to transmit first information and to supply information to said comparing device in response to the sensing of a line fault by at least one of said fault sensing devices, means connecting said receiving device to said comparing device for supplying information thereto, a tripping means, first circuit means operative connecting said second fault sensing device to said tripping means for actuation of said tripping means independently of said comparing means as a consequence of the occurrence of a fault in the line section, seconD circuit means operatively connecting said first fault sensing device to said tripping means for energization thereof and including said comparing device for energization of said tripping means solely at certain relationships of said supplied information, and third circuit means connected to said transmitter for interrupting the transmission of said first information as a consequence of the operation of either said first or said second fault sensing device.
Claim 14
Dependent Claim
98 words
The combination of claim 11 in which there is provided an OR network and a delay network, said tripping means includes a trip relay and a trip coil, said first circuit means connects said second fault sensing device to said trip coil and said third circuit means connects said second fault sensing device through said OR network and said delay network to said transmitter, said second circuit means connects said first fault sensing device to said trip relay and said third circuit means connects said trip relay through said OR network and said relay network to said transmitter.
Claim 15
Dependent Claim
36 words
The combination of claim 11 in which said second fault sensing device is a high speed current sensitive device effective in response to current which exceeds said predetermined minimum magnitude to actuate said first tripping means.
Claim 16
Dependent Claim
35 words
The combination of claim 11 in which said second fault sensing device is a voltage sensitive device effective in response to voltage which are below a predetermined minimum magnitude to actuate said first tripping means.
Claim 17
Dependent Claim
222 words
A protective relay network for protecting a section of a transmission line having a first disconnecting switch arranged at one end of the line section comprising, a first actuating network operable to be connected to said line, said first actuating network including a first line fault sensing device and a second fault sensing device for detecting faults and an information transmitting device, said first actuating network further including means operatively interconnecting said first fault sensing device to said transmitting device for actuating said transmitting device into a condition to transmit first information in response to the actuation of at least one of said fault sensing devices, a tripping means, means operatively connecting said first and second fault sensing devices to said tripping means for actuation of said tripping means as a consequence of the actuation of one of said fault sensing devices, means connecting said tripping means and said second sensing device to said transmitter for interrupting the transmission of said first information as a consequence of the operation of either said tripping means or said second device, said last-named connecting means including a time delay device for inserting a delay between the actuation of said transmitter to interrupt the transmission of said first information and the actuation of said last-named means by either said tripping means or said second sensing device.
Claim 18
Dependent Claim
222 words
A protective relay network for protecting a section of a transmission line having a first disconnecting switch arranged at one end of the line section comprising, a first actuating network operable to be connected to said line, said first actuating network including a first line fault sensing device and a second fault sensing device for detecting faults and an information transmitting device, said first actuating network further including means operatively interconnecting said first fault sensing device to said transmitting device for actuating said transmitting device into a condition to transmit first information in response to the actuation of at least one of said fault sensing devices, a tripping means, means operatively connecting said first and second fault sensing devices to said tripping means for actuation of said tripping means as a consequence of the actuation of one of said fault sensing devices, means connecting said tripping means and said second sensing device to said transmitter for interrupting the transmission of said first information as a consequence of the operation of either said tripping means or said second device, said last-named connecting means including a time delay device for inserting a delay between the actuation of said transmitter to interrupt the transmission of said first information and the actuation of said last-named means by either said tripping means or said second sensing device.
Claim 19
Dependent Claim
16 words
The combination of claim 15 in which said delay is in the magnitude of 10 milliseconds.
Claim 20
Dependent Claim
43 words
The combination of claim 15 in which there is provided a source of alternating potential controlling at least in part the said information transmitted by said transmitter device, and in which said delay is greater than one half cycle of said alternating potential.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |