SU450282A1 - Device for protection against electric shock - Google Patents

Device for protection against electric shock

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Publication number
SU450282A1
SU450282A1 SU1659009A SU1659009A SU450282A1 SU 450282 A1 SU450282 A1 SU 450282A1 SU 1659009 A SU1659009 A SU 1659009A SU 1659009 A SU1659009 A SU 1659009A SU 450282 A1 SU450282 A1 SU 450282A1
Authority
SU
USSR - Soviet Union
Prior art keywords
voltage
protection against
relay
phase
electric shock
Prior art date
Application number
SU1659009A
Other languages
Russian (ru)
Inventor
Александр Павлович Ксенофонтов
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 filed Critical
Priority to SU1659009A priority Critical patent/SU450282A1/en
Application granted granted Critical
Publication of SU450282A1 publication Critical patent/SU450282A1/en

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Description

Известны устройотва дл  защиты от поражени  элейтрическим тоном в систе.мах до 380 В с изолированной нейтралью и емкостью Фаз относительно земли до 2,5 , содержащие фильтр напр жении нулевой последовательности, между нулевой точкой которого и землей включено реле напр жени , и три реле напр жени , включенные между каждой из фаз и землей. Дл  повышени  надежности защиты в предлагаемом устройстве размыкающиес  контакты трех реле включены между каждой из фаз и землей через замыкающиес  контакты реле фильтра напр жений нулевой последовательности.There are known devices for protection against defeat by an eleutric tone in systems up to 380 V with an insulated neutral and a Phase capacitance relative to the ground up to 2.5, containing a zero-sequence voltage filter, between which zero point and the earth the voltage relay is connected, and three relays wives included between each phase and earth. In order to increase the reliability of protection in the proposed device, the opening contacts of the three relays are connected between each of the phases and the ground through the closing contacts of the relay of the zero-sequence voltage filter.

На чертеже дана схема описываемого устройства.The drawing is a diagram of the described device.

Между выходом фильтра I напр женим нулевой последовательности , подключенного к фазам 2Between the output of the filter I, the voltage of the zero-sequence connected to phase 2

источника с изолированной нейтралью , и землей включено реле 3 напр жени , а между каждой из фаз и землей - реле 4-6 напр жени . Дл  обеспечени  работоспособности устройства при наличии в системе контрол  изол ции наложенным посто нным током реле 4-6 должны быть подключены к a source with an isolated neutral, and the earth is turned on by a voltage relay 3, and between each of the phases and the earth is a voltage relay 4-6. In order to ensure the operability of the device, if there is insulation with applied DC current in the monitoring system, relays 4-6 must be connected to

0 земле через конденсаторы 7-9, Кажда  фаза сое.динена с землей через размыкающийс  контакт одного из реле 4-6 и замыкающийс  контакт реле 3. Кнопка dO слу5 жит дл  деблокировки схемы.0 through the capacitors 7-9. Each phase is connected to earth through the opening contact of one of the relays 4-6 and the closing contact of the relay 3. The dO button is used to unlock the circuit.

При нормальном режиме работы системы реле 4-6 размыкают свои контакты, а реле 3 обесточено и его контакты также разомкнуты.During normal operation of the system, relays 4-6 open their contacts, and relay 3 is de-energized and its contacts are also open.

00

В случае .прикосновени  человека к проводу одной из фаз системы напр жение этой фазы относительно земли снижаетс  и соответствующее реле 4-6 заминает свой контакт. Одновременно на выходе фильтра I по вл етс  напр жение и реле 3, срабатыва  ОБОИМ контактом, образует между проводом и землей нороткозамкнутую цепь, шунтирующую место прикосновени . В результате этого ток утечки через организм человека снижаетс  до допустимой величины. Область применени  предложенного устройства ограничена сие- .. темами с емкостью |)аз по отношению к земле не выше 2,5 мкТ-фазу при напр жении не выше 380 В. При больших емкост х системы неполное однофазное замыкание ее (через сопротивление человека; вызывает лишь незначительное перераспрецеление фазных напр жений и малое по величине напр жение нулевой последовательности, которые- могут.не привести к срабатыванию пеле.If a person touches the wire of one of the phases of the system, the voltage of this phase relative to the ground decreases and the corresponding relay 4-6 jamms its contact. At the same time, at the output of the filter I, a voltage appears and the relay 3, triggered by an OBOIM contact, forms a short-circuit between the wire and the ground, shunting the point of contact. As a result, the leakage current through the human body is reduced to an acceptable value. The field of application of the proposed device is limited to syen -... themes with a capacitance of |) az with respect to earth not exceeding 2.5 µT phase with a voltage not exceeding 380 V. With large system capacitances, its incomplete single-phase closure (through human resistance; only a slight redistribution of phase voltages and a small amount of zero-sequence voltage, which may not lead to the operation of the pele.

nPMWiiiT .ИЗОБРЕТЬ НИЯnPMWiiiT .ISBOUNDATE

Устройство дл  защиты от пора-жени  электрическим тоном в системах до 380 В о изолированной нейтралью и емкостью фаз относительно земли до 2,5 мк -фазу, содержащее фильтр напр жений нулевой последовательности, между нулевой точкой которого и землей включено реле напр жени , и три реле напр жени , включенных между каждой из Фаз и землей, отличающеес  тем, что, с целью повышени  надежности, размыкающиес контакты трех реле включены между каждой из срез и землей через замывающиес  контакты реле if иль т ра напр жений нулевой последовательности .A device for protection against electrophore in systems up to 380 V about an isolated neutral and a phase capacitance relative to the ground up to 2.5 micron phase containing a zero-sequence voltage filter, between the zero point and ground of the voltage relay and three voltage relays connected between each of the phases and the ground, characterized in that, in order to increase reliability, the opening contacts of the three relays are connected between each of the section and the ground through the relay contacts if if or not the zero-sequence voltage .

SU1659009A 1971-05-18 1971-05-18 Device for protection against electric shock SU450282A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1659009A SU450282A1 (en) 1971-05-18 1971-05-18 Device for protection against electric shock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1659009A SU450282A1 (en) 1971-05-18 1971-05-18 Device for protection against electric shock

Publications (1)

Publication Number Publication Date
SU450282A1 true SU450282A1 (en) 1974-11-15

Family

ID=20475944

Family Applications (1)

Application Number Title Priority Date Filing Date
SU1659009A SU450282A1 (en) 1971-05-18 1971-05-18 Device for protection against electric shock

Country Status (1)

Country Link
SU (1) SU450282A1 (en)

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