GB838298A - Improvements in or relating to electric protective relay devices - Google Patents

Improvements in or relating to electric protective relay devices

Info

Publication number
GB838298A
GB838298A GB19252/56A GB1925256A GB838298A GB 838298 A GB838298 A GB 838298A GB 19252/56 A GB19252/56 A GB 19252/56A GB 1925256 A GB1925256 A GB 1925256A GB 838298 A GB838298 A GB 838298A
Authority
GB
United Kingdom
Prior art keywords
relay
resistor
heater
circuit
relating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB19252/56A
Inventor
George Francis Chrisp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
A Reyrolle and Co Ltd
Original Assignee
A Reyrolle and Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by A Reyrolle and Co Ltd filed Critical A Reyrolle and Co Ltd
Priority to GB19252/56A priority Critical patent/GB838298A/en
Publication of GB838298A publication Critical patent/GB838298A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/085—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current making use of a thermal sensor, e.g. thermistor, heated by the excess current

Abstract

838,298. Protective cut-out arrangements. REYROLLE & CO. Ltd., A. June 21, 1956, No. 19252/56. Class 38 (5). A protective device comprises a heater element A energized from the protected circuit and acting to generate heat in accordance with the current flow in such circuit, and a relay network with a relay C in a sealed case and in series with a temperature-sensitive resistor B exposed to the heat generated by the heater A. The resistor and relay may be supplied from a separate source or (as shown) connected in parallel with the heater so that under short-circuit conditions the relay C will operate without waiting for the effect of the heat generated. The resistor B has a negative temperature coefficient and a further resistor F having a similar coefficient may be connected across the relay C to provide ambient temperature compensation. A variable resistor E is provided for current setting. A resistor B having a positive temperature coefficient may be used, connected in parallel with the relay coil.
GB19252/56A 1956-06-21 1956-06-21 Improvements in or relating to electric protective relay devices Expired GB838298A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB19252/56A GB838298A (en) 1956-06-21 1956-06-21 Improvements in or relating to electric protective relay devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19252/56A GB838298A (en) 1956-06-21 1956-06-21 Improvements in or relating to electric protective relay devices

Publications (1)

Publication Number Publication Date
GB838298A true GB838298A (en) 1960-06-22

Family

ID=10126270

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19252/56A Expired GB838298A (en) 1956-06-21 1956-06-21 Improvements in or relating to electric protective relay devices

Country Status (1)

Country Link
GB (1) GB838298A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0352987A2 (en) * 1988-07-26 1990-01-31 Texas Instruments Incorporated Solid state circuit protector
EP0375262A2 (en) * 1988-12-22 1990-06-27 Texas Instruments Incorporated Electrothermal sensor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0352987A2 (en) * 1988-07-26 1990-01-31 Texas Instruments Incorporated Solid state circuit protector
EP0352987A3 (en) * 1988-07-26 1991-07-10 Texas Instruments Incorporated Solid state circuit protector
EP0375262A2 (en) * 1988-12-22 1990-06-27 Texas Instruments Incorporated Electrothermal sensor
EP0375262A3 (en) * 1988-12-22 1991-07-17 Texas Instruments Incorporated Electrothermal sensor

Similar Documents

Publication Publication Date Title
GB557707A (en) Improvements in or relating to relay timing arrangements
GB918990A (en) Improvements in thermally responsive electrical control systems
GB1382299A (en) Thermostatic system for nuclear gyromagnetic resonance permanent magnet apparatus
ES342652A1 (en) Thermally-responsive bimetallic starting switch for motors
GB838298A (en) Improvements in or relating to electric protective relay devices
GB735755A (en) Improvements in and relating to the protection of electrical circuits
GB1113909A (en) Improvements in control systems for electrically heated devices
ES300566A1 (en) Temperature protection circuit
GB1227806A (en)
GB557710A (en) Circuit arrangements for resistance elements having a high resistance-temperature coefficient
GB1115963A (en) Circuit arrangement for sensing overtemperatures
GB809388A (en) Improvements in or relating to electrical voltage regulating equipment
GB1096513A (en) Improvements relating to starting arrangements for single-phase motors
GB565134A (en) Improvements in or relating to protective arrangements for electrical circuits
JPS5237494A (en) Gas, smoke detection device
GB1312122A (en) Protection circuit
GB1164826A (en) Protective Systems for Electric Lines
GB905267A (en) Synchronous motor control
GB806294A (en) Thermostatically regulated temperature control system
GB873047A (en) Improvements in or relating to electric fan heaters
GB760358A (en) Improvements in or relating to electric protective arrangements
SU117725A1 (en) Overcurrent thermal relay
GB838238A (en) Improvements in or relating to voltage responsive relay circuit arrangements
GB857909A (en) Improvements relating to electrical immersion heaters
GB907761A (en) Temperature indicating and/or controlling means