scholarly journals Impact of Time Relay for Changing of the Tariff on Commercial Losses at Mechanical Meters

2016 ◽  
Vol 49 (29) ◽  
pp. 169-174
Author(s):  
Avni Alidemaj ◽  
Vehebi Sofiu ◽  
Lutfije Dervishi ◽  
Arif Vitija ◽  
Sadik Latifaj
Keyword(s):  
Time Relay

Continuous-time relay self-tuning control

1988 ◽  
Vol 47 (4) ◽  
pp. 1061-1080 ◽  
Author(s):  
H. DEMIRCIOĞLU ◽  
P. J. GAWTHROP
Keyword(s):  
Continuous Time ◽  
Self Tuning ◽  
Time Relay

A time relay to replace the pulse counter on the Tungsram machine

1979 ◽  
Vol 36 (10) ◽  
pp. 583-584
Author(s):  
M. N. Makhnach
Keyword(s):  
Pulse Counter ◽  
Time Relay

scholarly journals Analisis Koordinasi Over Current Relay Dan Ground Fault Relay Terhadap Keandalan Sistem

2020 ◽  
Vol 3 (1) ◽  
pp. 30-40
Author(s):  
I Nengah Sunaya ◽  
I Gede Suputra Widharma
Keyword(s):  
Distribution System ◽  
Short Circuit ◽  
Work Time ◽  
Two Phase ◽  
Electricity System ◽  
Ground Fault ◽  
Three Phase ◽  
Overcurrent Relay ◽  
Time Relay

This research had done base on case study in the feeder of substation 20 kV Jababeka. Existing data showed that condition is well with not too long differential, over all setting on the Overcurrent Relay (OCR) – Ground Fault Relay (GFR) in the field is well. From calculated result can be seem that current of short circuit disturb is influenced by distance between disturbance points. Using over current relay has important purpose in the protection of electricity system. The qualification need setting minimum time of over current relay in the feeder not less than 0.3 second. This consider to the relay will not in trip condition in rush current from distribution transformator that has been connected in the distribution system when the feeder starts operated. Starting time for relay in the feeder is faster than work time in the incoming side with average time about 0.4 second for one phase disturbance side. But for three phase and two phase disturbance side, work time relay has interval time about 0.4 second and than increase with average increament about 0.1 second when transmission line is longer (from distance aspects about 0%, 25%, 50%, 75% and 100%).

Design and Experimental Research of Automatic Control System of Material Transport Car Based on Siemens S7-300 PLC

2014 ◽  
Vol 703 ◽  
pp. 277-280
Author(s):  
Hao Wang ◽  
Xiu Zhong Li ◽  
Wei Yang ◽  
Xiao Chu Liu ◽  
Quan Peng He
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Simulation Analysis ◽  
System Response ◽  
Material Transport ◽  
Relay Control ◽  
Cleaning Equipment ◽  
Automatic Positioning ◽  
Time Relay

Aiming to the problem of the traditional relay control system, such as high failure rate, low precision control, complex installation, slow system response, etc ,which caused by the extensive uses of intermediate relay, time relay, counter and other devices in the system, this paper provides a design of an automatic control system which integrates automatic positioning, automatic feeding, automatic cleaning equipment based on siemens S7-300 PLC instead of the traditional relay control system and carry out simulation analysis by PLCSIM software, compared with the material transport car model motion excellent to verify the rationality of the control system design.

scholarly journals Determination of Timing Parameters of Dust Clouds Explosion in Dependence on the Size of the Vessel Volume

2021 ◽  
Vol 29 (48) ◽  
pp. 55-64
Author(s):  
Richard Kuracina ◽  
Zuzana Szabová
Keyword(s):  
Video Camera ◽  
Standard Equipment ◽  
Chamber Volume ◽  
Dust Clouds ◽  
Vessel Volume ◽  
Time Parameters ◽  
Determination Of Parameters ◽  
Dispersing System ◽  
Time Relay

Abstract EN 14034 standard defines the requirements for igniter, to determine the properties of dust clouds. The standard specifies the conditions for occurrence of explosions of dust clouds. According to the standard, equipment with a volume of 1m3 and 20L can be used to determine the explosion parameters of dispersed dusts. The equipment has the time parameters of dispersing and the ignition system defined in the Standard. Experimental determination of time parameters is required for a different chamber volume. The article therefore deals with the determination of parameters for dispersing system in the 291 litre chamber. Determination of igniter delay was performed on the base of setting the time relay. Activation of pressurised air flow was determined by calculation, and it was subsequently experimentally verified in laboratory conditions. A video camera recording was selected for measuring the rate of nitrocellulose ignition from the resistance wire. The result of this study is determination of the igniter timing in dependence of the explosion chamber volume. The time delay of the nitrocellulose igniter is 320 ms.

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