Devices, methods, and systems for alternating current circuits for airfield lighting

Patent metadata

Field	Value
Publication number	US-10806005-B2
Application number	US-201916673215-A
Country	US
Kind code	B2
Filing date	Nov 4, 2019
Priority date	Feb 27, 2017
Publication date	Oct 13, 2020
Grant date	Oct 13, 2020

Abstract

Devices, methods, and systems for alternating current circuits for airfield lighting are described herein. One system includes a circuit comprising an isolation transformer, a protection hardware circuit coupled to the isolation transformer, wherein the protection hardware prevents a voltage between an electrical contact of the circuit and a ground contact from meeting or exceeding a threshold voltage, and a load coupled to the protection hardware circuit to receive electrical energy from the isolation transformer.

First claim

What is claimed:

1. A system for alternating current circuits for airfield lighting, comprising:
a circuit comprising an isolation transformer;
a protection hardware coupled to the isolation transformer, wherein the protection hardware is configured to detect a voltage spike at an output of the isolation transformer and prevent a voltage between an electrical contact of the circuit and a ground contact from meeting or exceeding a threshold voltage; and
a load coupled to the protection hardware to receive energy from the isolation transformer, wherein the isolation transformer and the protection hardware are positioned within an enclosure configured to protect a connection between the isolation transformer and the protection hardware.

2. The system of claim 1 , wherein the protection hardware includes a circulating path through a normally open (N/O) relay contact for load sensing logic.

3. The system of claim 1 , wherein the protection hardware includes a relay configured to bypass a lamp load upon detection of the voltage spike at the output of the isolation transformer.

4. The system of claim 3 , wherein the relay is a triple pole double throw (3PDT) relay.

5. The system of claim 3 , wherein the relay is a quadruple pole double throw (4PDT) relay.

6. The system of claim 1 , wherein the isolation transformer is configured to isolate the protection hardware while allowing additional power sources to provide electrical power to the protection hardware.

7. The system of claim 6 , wherein the additional power sources include a power supply coupled to the isolation transformer.

8. A system for alternating current circuits for airfield lighting, comprising:
a circuit comprising an isolation transformer, wherein the circuit is coupled to a current regulator configured to provide electrical energy to the isolation transformer;
a protection hardware coupled to the isolation transformer, wherein the protection hardware prevents a voltage between an electrical contact of the circuit and a ground contact from meeting or exceeding a threshold voltage; and
a load coupled to the protection hardware to receive energy from the isolation transformer, wherein the protection hardware includes a load sensor configured to measure a voltage, a current, and/or a frequency of electrical power provided to the load.

9. The system of claim 8 , wherein the load sensor is configured to determine the load is decoupled from the protection hardware.

10. The system of claim 8 , wherein the isolation transformer is coupled to a power supply configured to alter the voltage, current, and/or frequency of electrical power.

11. The system of claim 8 , wherein the load sensor is coupled to a relay coil.

12. The system of claim 11 , wherein the protection hardware includes a double pole double throw (DPDT) relay.

13. The system of claim 12 , wherein the load sensor is configured to instruct the relay coil to change a state of the DPDT relay from a normally closed (N/C) position to a normally open (N/O) position based on the voltage, current, and/or frequency measured by the load sensor.

14. A system for alternating current circuits for airfield lighting, comprising:
a source regulator coupled to an electrical power source;
a plurality of isolation transformers coupled in series with the source regulator;
a plurality of protection hardware devices coupled to each of the plurality of isolation transformers, wherein each of the plurality of isolation transformers is configured to isolate the plurality of protection hardware devices coupled thereto while allowing additional power sources to provide electrical power to the plurality of protection hardware devices coupled thereto; and
a plurality of airfield lamps coupled to each of the plurality of protection hardware devices, wherein the plurality of airfield lamps are coupled to a corresponding triple pole double throw (3PDT) relay of a corresponding protection hardware device of the plurality of protection hardware devices, and wherein the plurality of protection hardware devices each include an electronically operated switch configured to use an electromagnet to mechanically operate a first switch and a second switch of the 3PDT relay.

15. The system of claim 14 , wherein the 3PDT relay is coupled to a load sensor.

16. The system of claim 15 , wherein the load sensor is coupled to a relay coil.

17. The system of claim 16 , wherein the load sensor is configured to send a signal to the relay coil to change a state of the 3PDT relay from a normally closed (N/C) position to a normally open (N/O) position.

18. The system of claim 15 , wherein the load sensor is coupled to a power supply.

Assignees

• Honeywell Int Inc

Inventors

• Chawda Nipun Kumar
• Schuett Hans-Willy
• Wiechert Reiner

Classifications

• Y02B20/30

  Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED] · CPC title

• H05B47/26

  Circuit arrangements for protecting against earth faults · CPC title

• H05B45/382 Primary

  with galvanic isolation between input and output · CPC title

• H05B47/235

  with communication between the lamps and a central unit · CPC title

• H05B47/23

  of two or more light sources connected in series · CPC title