Showing papers on "Electricity meter published in 1968"

A Method of Determining the Mismatch Correction in Microwave Power Measurements

Abstract: With the increasing demands for accuracy in microwave measurements, mismatch corrections are assuming an increased importance. In the application of a terminating-type power meter, the appropriate mismatch factor involves the complex reflection coefficients of the generator, load, and power meter. Instead of measuring the individual reflection coefficients, which usually calls for the use of a slotted line, a directional coupler technique is described that obtains the mismatch factor directly.

Metering of consumer's electricity using a dispersed ring counter

Abstract: 1,133,375 Electricity meter signalling systems ELECTRICITY COUNCIL 16 May, 1967 [17 May, 1966], No 21830/66 Heading G4H In a signalling system for providing indications of the readings of integrating meters at a remote location, each meter has a control unit, a number of control units being connected in a ring circuit so that each prepares the next for operation and the meters are thereby sampled successively Each meter has a bi-stable circuit having a pair of contacts which close at a rate depending on the rate of consumption of electricity, the contacts being sampled at least once between each change of state when the meter is operating at maximum rate The control units are selected in succession by signals on lines A and B which are square wave signals of alternating polarity, each half wave being 40 ms duration The wave on line B lags by 10 ms behind that on line A The Kth unit comprises a relay Rk which is connected to line A by the closure of contacts Rj2 of the previous unit, successive units being interconnected by lines C Relay Rk is picked by the positive half wave on line A via diode Hk1 and closes contact Rk 1 so that it holds by the positive half wave on line B via diode Hk2 There are two meters connected to unit k having contacts Mk1 and Mk2 When relay contact Rk3 closes, the meter contacts, through oppositely poled diodes Gk1 and Gk2, connect a signal line D to earth line F The central station transmits a succession of 10 ms positive and negative pulses in line D If one of the meter contacts is closed, the corresponding positive or negative pulses is shorted to earth If both are closed, both the positive and the negative pulses are shorted The condition of the meter contacts can thereby be determined at the central station The following negative pulses on lines A and B cause the relay Rl of the next control unit to respond, being enabled by closure of the "handon" contact Rk2 Between reading cycles control signals may be sent over lines A, B, D, and E to control the apparatus at the field stations Positive or negative signals on line E cause relays Sk or Tk to pick The contacts of these relays condition circuits to further relays which are selected by positive or negative pulses on leads A, B, and D In another form adapted to respond to sinusoidal, rather than square waves on lines A and B each unit has two relays, one with diodes passing positive halfcycles and one with diodes passing negative half-cycles