FR2592172A1 - System for the detection and warning of dangerous voltages on vehicles operating on construction sites - Google Patents
System for the detection and warning of dangerous voltages on vehicles operating on construction sitesInfo
- Publication number
- FR2592172A1 FR2592172A1 FR8515781A FR8515781A FR2592172A1 FR 2592172 A1 FR2592172 A1 FR 2592172A1 FR 8515781 A FR8515781 A FR 8515781A FR 8515781 A FR8515781 A FR 8515781A FR 2592172 A1 FR2592172 A1 FR 2592172A1
- Authority
- FR
- France
- Prior art keywords
- contact
- circuit
- relay
- current
- alarm
- 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.)
- Granted
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
- H02H3/16—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 fault current to earth, frame or mass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
- G01R19/155—Indicating the presence of voltage
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Alarm Devices (AREA)
- Keying Circuit Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The system uses an electromechanical method for indicating the presence of dangerous abnormal voltages on machines operating on construction sites produced by inadvertent contact with a source of current. The device, shown in the diagram, operates by the activation of an alarm signal when a current is detected. The primary of a toroidal relay 1 is placed in series in an earthing circuit, whose earth contact is provided by a chain 2. When the leakage current due to the contact of the machine with a voltage source passes through the 15 to 30 MA winding, the contact 3 and 1, 9 is opened, cutting off the supply to the relay 4. The contact of the relay 4 drops out, supplying the alarm systems 8 and 9 and the fault indicator 7. These alarm systems may be stopped by the circuit breaker 10. When anything unusual occurs, the fault indicator lamp remains on. The correct operation of the circuit may be tested by actuating the push button 5 which, through the resistor 6, will cause a current to pass through the toroidal circuit, thus triggering the alarm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8515781A FR2592172B1 (en) | 1985-10-15 | 1985-10-15 | HAZARDOUS VOLTAGE DETECTION AND ALARM SYSTEM ON CONSTRUCTION VEHICLES |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8515781A FR2592172B1 (en) | 1985-10-15 | 1985-10-15 | HAZARDOUS VOLTAGE DETECTION AND ALARM SYSTEM ON CONSTRUCTION VEHICLES |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2592172A1 true FR2592172A1 (en) | 1987-06-26 |
FR2592172B1 FR2592172B1 (en) | 1988-02-19 |
Family
ID=9324145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8515781A Expired FR2592172B1 (en) | 1985-10-15 | 1985-10-15 | HAZARDOUS VOLTAGE DETECTION AND ALARM SYSTEM ON CONSTRUCTION VEHICLES |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2592172B1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3296494A (en) * | 1963-06-24 | 1967-01-03 | Jr Andrew Stenger | Voltage responsive devices and methods of voltage detection |
-
1985
- 1985-10-15 FR FR8515781A patent/FR2592172B1/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3296494A (en) * | 1963-06-24 | 1967-01-03 | Jr Andrew Stenger | Voltage responsive devices and methods of voltage detection |
Non-Patent Citations (2)
Title |
---|
THE ENGINEER, vol. 221, no. 5758, 3 juin 1966, page 864, Londres, GB; "Live cable detector for cranes" * |
TOUTE L'ELECTRONIQUE, août-septembre 1972, pages 32-35, Paris, FR; M.OULES: "Système d'alarme anti-électrocution" * |
Also Published As
Publication number | Publication date |
---|---|
FR2592172B1 (en) | 1988-02-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |