GB1005941A - Improvements relating to testing devices for testing protective switches - Google Patents
Improvements relating to testing devices for testing protective switchesInfo
- Publication number
- GB1005941A GB1005941A GB3595462A GB3595462A GB1005941A GB 1005941 A GB1005941 A GB 1005941A GB 3595462 A GB3595462 A GB 3595462A GB 3595462 A GB3595462 A GB 3595462A GB 1005941 A GB1005941 A GB 1005941A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- voltage
- protective
- fault
- relay
- 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
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
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
- H02H3/044—Checking correct functioning of protective arrangements, e.g. by simulating a fault
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
1,005,941. Testing protective switches. SCHUTZAPPARATE-GESELLSCHAFT PARIS & CO. Sept. 21,1962 [Sept. 25,1961], No. 35954/62. Heading G1U. In a device for testing a fault voltage of fault current protective switch there is included at least one variable test resistor and a voltage responsive relay whose operating coil is connected in parallel with the test resistor and which has a contact in series with the test resistor for switching it into circuit to simulate a fault upon commencement of a test and for switching it out of circuit if the simulated fault current or voltage becomes excessive. A piece of equipment M such as a three phase motor is protected by a switch FU-SW which should operate if the voltage of the motor housing rises too much with respect to earth. In order to test whether the protective switch is functioning properly the circuit arrangement of the invention is connected so that terminal K3 is connected to one phase of the power supply, K<SP>2</SP> to the motor casing at Pro and K1 to the neutral of the power supplies. In the arrangement a relay A operates switch contacts a 1 , a 2 , a 3 while a switch P in the relay energising circuit is coupled to the test potentiometers P1 and P2 which are used to simulate fault conditions and is closed when they are set in their initial positions. To carry out a fault voltage test, the switch S2 is set to the position FU and the potentiometer P1 to its initial position. A circuit has already been completed from the conductor R through the lamp L2 to the conductor N to light L2 and now the operation of the relay A upon the closure of the switch P closes contact a 1 to operate the lamp L1, contact a 3 to hold the relay on and contact a 2 to complete a circuit from the lead R through the switches S1 and S2 the variable resistor P1 and back to the connection Pro. By reducing the value of P1 more of the supply voltage is made to appear across the housing resistance Pro, if this has any substantial value, and less across the relay A, which will eventually fall out, thus extinguishing the lamp L1. Before this happens the protecting switch Fu-Sw should have operated if it is working correctly. If this operation cannot be detected audibly, then K3 should be connected to the lead R on the motor side of the switch so that its operation will extinguish the light L2 (as well as L1). For testing a protective switch which operates according to fault-currents the switch S2 is set to the position F1 so that a variable resistor P2 having a graduated winding indicating different release currents may be used. Terminals K4, K5, K6 are provided so that measuring instruments may be inserted. Connection between K4 and K5 with the connection piece D removed enables current flow to be measured, while connection between K5 and K6 with the switch T1 as shown enables the voltage between the phase and protective conductors to be measured, whilst with it in the alternative position the phase-neutral voltage is determined. Provision is made for carrying out tests with a supplementary earth probe,which may be connec - ted to terminal K7 by setting the switch S1 in its alternative position. With a volt meter connected between K5 and K6 and ammeter between K4 and K5 the earthing voltage and earthing current between the protective conductor Pro and the probe may be measured. Operation of the switch T1 enables the protective-neutral conductor voltage to be measured. The apparatus may be used to determine the loop resistance, and may be used with delta networks having no earth conductor by a modification of the described technique.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP27924A DE1137115B (en) | 1961-09-25 | 1961-09-25 | Circuit arrangement for testing residual current and residual voltage circuit breakers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1005941A true GB1005941A (en) | 1965-09-29 |
Family
ID=7371043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3595462A Expired GB1005941A (en) | 1961-09-25 | 1962-09-21 | Improvements relating to testing devices for testing protective switches |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1137115B (en) |
FR (1) | FR1339629A (en) |
GB (1) | GB1005941A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102692575A (en) * | 2012-06-15 | 2012-09-26 | 福建水口发电集团有限公司 | Optocoupler testing method based on resistance voltage division |
CN106802392A (en) * | 2016-12-23 | 2017-06-06 | 雅砻江流域水电开发有限公司 | Portable full nodal exactness detection relay checking platform |
CN107728046A (en) * | 2017-07-04 | 2018-02-23 | 合肥合大智能科技有限公司 | A kind of stacked switch electrical property detector |
CN111210702A (en) * | 2020-03-03 | 2020-05-29 | 广州株电交通设备有限公司 | Subway traction power transformation system training platform |
CN114326546A (en) * | 2020-09-29 | 2022-04-12 | 云米互联科技(广东)有限公司 | Kitchen appliance control method, kitchen appliance and computer-readable storage medium |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1281566B (en) * | 1962-12-06 | 1968-10-31 | Schutzapp Ges Paris & Co Mbh K | Circuit for determining the loop resistance of an alternating current network |
DE19507060B4 (en) * | 1995-03-01 | 2005-01-20 | Gossen-Metrawatt Gmbh | Method and device for checking protective measures in real IT networks |
CN113658827B (en) * | 2021-08-06 | 2024-06-11 | 贵州天义电器有限责任公司 | Multifunctional relay parameter adjusting device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH216801A (en) * | 1939-03-16 | 1941-09-15 | Robert Wacker Fa | Arrangement for testing the earth protection line on electrical devices. |
-
1961
- 1961-09-25 DE DEP27924A patent/DE1137115B/en active Pending
-
1962
- 1962-08-25 FR FR907921A patent/FR1339629A/en not_active Expired
- 1962-09-21 GB GB3595462A patent/GB1005941A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102692575A (en) * | 2012-06-15 | 2012-09-26 | 福建水口发电集团有限公司 | Optocoupler testing method based on resistance voltage division |
CN106802392A (en) * | 2016-12-23 | 2017-06-06 | 雅砻江流域水电开发有限公司 | Portable full nodal exactness detection relay checking platform |
CN107728046A (en) * | 2017-07-04 | 2018-02-23 | 合肥合大智能科技有限公司 | A kind of stacked switch electrical property detector |
CN111210702A (en) * | 2020-03-03 | 2020-05-29 | 广州株电交通设备有限公司 | Subway traction power transformation system training platform |
CN114326546A (en) * | 2020-09-29 | 2022-04-12 | 云米互联科技(广东)有限公司 | Kitchen appliance control method, kitchen appliance and computer-readable storage medium |
CN114326546B (en) * | 2020-09-29 | 2023-10-03 | 云米互联科技(广东)有限公司 | Kitchen electric appliance control method, kitchen electric appliance and computer readable storage medium |
Also Published As
Publication number | Publication date |
---|---|
FR1339629A (en) | 1963-10-11 |
DE1137115B (en) | 1962-09-27 |
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