摘要:
A completely solid state photoelectric pulse initiator for electric utility meter telemetry and recording systems includes a low power CMOS digital integrated circuit (I.C.) flip-flop output circuit for directly generating output pulses in response to the rate of rotation of a meter movement. A pulse rate dividing circuit is provided by a presettable divide-by-N CMOS digital I.C. in one preferred form for electronically varying the ratio of the output pulses relative to the input pulses. A simplified data magnetic recording receiver circuit is capable of being supplied recorder drive current directly from the Q and Q logic outputs of the output flip-flop to produce non-return-to-zero (NRZ) data pulse recording.
摘要:
An improved radiometric pulse initiator for three wire remote meter telemetry systems includes interchangeable reflective patterned drums provided with alternative preselectable numbers of reflecting segments for generating desired pulse rate in response to a predetermined amount of rotation of a watthour meter movement.
摘要:
A watt-hour meter has in its base the circular core of a current transformer, wound with the secondary coil, this coil being connected to the current coil of the meter driving unit. The heavy load-carrying conductors extending through this core as its primary winding are carried by the base and are in the form of oppositely facing ''''U'''' bars. A special meter box and terminal block facilitates the connecting of this combination in the circuit being measured. Alternatively it may be mounted at a different position, not in the circuit, in which case closing the cover causes the display of words indicating that it is not in service. Shiftable connection links reverse voltage connections in case the supply and load conductors are interchanged from the more usual arrangement, and also facilitate testing. The service connectors are especially suited for very heavy service conductors. Calibration is of the total self-contained meter, i.e. with current transformer as a part thereof.
摘要:
THE POTENTIAL COIL OF AN INDUCTION WATT-HOUR METER IS ENCAPSULATED IN AN ELECTRICALLY INSULATING RESINOUS MATERIAL AND MOUNTED ON THE CORE LEG OF THE POTENTIAL ELECTROMAGNET OF THE METER. THE LOWER END OF THE ENCAPSULATED COIL WHICH IS CLOSEST TO THE VOLTAGE POLE FACE IS GENERALLY DIXED TO THE CORE LEG OF THE ELECTROMAGNET PREFERABLE BY A PLASTIC ADHESIVE MATERIAL. THE UPPER END OF THE COIL IS MOVABLY HELD BY A SPRING MEMBER OR CRUSHABLE PLASTIC BOSSES BETWEEN THE TOP OF THE ENCAPSULATED COIL AND THE YOKE PORTION OF THE POTENTIAL ELECTROMAGNET.