IE820835L - Solid state load protection system - Google Patents

Solid state load protection system

Info

Publication number
IE820835L
IE820835L IE820835A IE83582A IE820835L IE 820835 L IE820835 L IE 820835L IE 820835 A IE820835 A IE 820835A IE 83582 A IE83582 A IE 83582A IE 820835 L IE820835 L IE 820835L
Authority
IE
Ireland
Prior art keywords
load
capacitor
voltage
function
reset
Prior art date
Application number
IE820835A
Other versions
IE52772B1 (en
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of IE820835L publication Critical patent/IE820835L/en
Publication of IE52772B1 publication Critical patent/IE52772B1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H6/00—Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Generators And Motors (AREA)

Abstract

A solid-state load protection system having electronic simulation of motor M heating characteristics uses a current sensing function 14 so as to produce an output signal which is related to the current therein. Attached to the current sensing function 14 is an inverse time delay circuit 50 which has a signal path for charging and discharging a capacitor 26. Depending on the voltage across the capacitor which is related to the thermal state of the load, the inverse time delay circuit which is monitoring the voltage will initiate either a time-out or trip sequence of a reset sequence. The time before time- out or reset is proportional to the voltage across the capacitor. An output function 52 which is connected to the overcurrent and timing function upon receiving a trip signal causes a light emitting diode to conduct and also deenergizes a contactor 16 through which a current source is connected to the load. Upon receiving a reset signal the output function prohibits the light- emitting diode from conducting and energizes a contactor thereby connecting the current source with the load. <IMAGE> [GB2097615A]
IE835/82A 1981-04-27 1982-04-07 Solid state load protection system having electronic simulation of motor heating IE52772B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25809281A 1981-04-27 1981-04-27

Publications (2)

Publication Number Publication Date
IE820835L true IE820835L (en) 1982-10-27
IE52772B1 IE52772B1 (en) 1988-02-17

Family

ID=22979069

Family Applications (1)

Application Number Title Priority Date Filing Date
IE835/82A IE52772B1 (en) 1981-04-27 1982-04-07 Solid state load protection system having electronic simulation of motor heating

Country Status (12)

Country Link
JP (1) JPS57183214A (en)
AU (1) AU560789B2 (en)
BE (1) BE892997A (en)
BR (1) BR8202362A (en)
CA (1) CA1187591A (en)
CH (1) CH658756A5 (en)
DE (1) DE3215180A1 (en)
ES (1) ES8306930A1 (en)
FR (1) FR2504748B1 (en)
GB (1) GB2097615B (en)
IE (1) IE52772B1 (en)
ZA (1) ZA822618B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3730829C2 (en) * 1987-09-14 1997-02-06 Siemens Ag Overload protection for the excitation circuit of a synchronous machine
AU612195B2 (en) * 1987-11-11 1991-07-04 Dega Research Pty. Ltd. Method and apparatus for protecting a pump motor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1407271A (en) * 1964-06-20 1965-07-30 Electronique Et D Automatique Electrical circuit protection device
US3875464A (en) * 1973-10-10 1975-04-01 Westinghouse Electric Corp Solid state overload relay
FR2432211A1 (en) * 1978-07-24 1980-02-22 Simplex Appareils Cut=out circuit for three=phase transformer protection - has three transformers with resistors and thermistor associated with capacitor and solenoid

Also Published As

Publication number Publication date
GB2097615B (en) 1985-06-12
BE892997A (en) 1982-10-27
BR8202362A (en) 1983-04-05
AU560789B2 (en) 1987-04-16
FR2504748B1 (en) 1986-04-18
DE3215180A1 (en) 1982-11-11
IE52772B1 (en) 1988-02-17
ES511687A0 (en) 1983-06-01
CA1187591A (en) 1985-05-21
GB2097615A (en) 1982-11-03
FR2504748A1 (en) 1982-10-29
CH658756A5 (en) 1986-11-28
ES8306930A1 (en) 1983-06-01
JPS57183214A (en) 1982-11-11
AU8266182A (en) 1982-11-04
ZA822618B (en) 1983-04-27

Similar Documents

Publication Publication Date Title
IE820834L (en) Solid state load protective system
IE820832L (en) Protection systems
JPS5510874A (en) Switching power supply circuit
IE820835L (en) Solid state load protection system
IE820833L (en) Solid state load protection system
JPS57182656A (en) Trigger device
SU1418841A1 (en) Device for automatic reconnection of thyristor converter
SU843076A1 (en) Device for protecting shaft traction dc network
KR890002477B1 (en) Time-delayed relay
SU652545A2 (en) Arrangement for checking and protecting the group of power supply sources
SU1181039A1 (en) Device for protective de-energization with dependent actuation time
GR920100034A (en) Flux monitor high light cut-off circuit.
SU879572A1 (en) Dc voltage stabilizer
KR950008743Y1 (en) Energy discharge control circuit in shell detonator
JPS5928671A (en) Detection circuit of voltage drop
SU853562A1 (en) Voltage transducer for protecting power sources from overloads
SU1229858A1 (en) Power supply system
JPS5542033A (en) Insulation resistance tester
KR950002822Y1 (en) Traffic signal for measurement of output voltage
JPH01151315A (en) Pulse signal input circuit
SU1306759A1 (en) Device for protection of d.c.traction drive
JPS56132813A (en) Reset device of integrated circuit
SU978126A1 (en) Stabilized power supply source
SU1196987A1 (en) Device for earth leakage protection in a.c.network
SU1293501A2 (en) Device for registering radiation