System and method for isolating and protecting a PoE (power over ethernet) device

Patent metadata

Field	Value
Publication number	US-9819500-B2
Application number	US-201514837010-A
Country	US
Kind code	B2
Filing date	Aug 27, 2015
Priority date	Aug 28, 2014
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A surge protection device includes an isolating transformer configured to conduct an Ethernet data signal on a wire pair and configured to provide voltage surge protection for Ethernet equipment coupled to the wire pair, and a power supply coupled to the isolating transformer and configured to conduct a DC voltage signal from the wire pair and configured to provide voltage surge protection for the Ethernet equipment coupled to the wire pair.

First claim

What is claimed is:

1. A surge protection device, comprising:
an isolating transformer configured to conduct an Ethernet data signal on a wire pair and configured to provide voltage surge protection for Ethernet equipment coupled to the wire pair;
a power supply coupled to the isolating transformer and configured to conduct a DC voltage signal from the wire pair and configured to provide voltage surge protection for the Ethernet equipment coupled to the wire pair;
an input port coupled to the isolating transformer by the wire pair;
an output port coupled to the isolating transformer by a second wire pair;
a blocking capacitor located between the isolating transformer and the output port; and
a fuse located between the isolating transformer and the output port.

2. The surge protection device of claim 1 , wherein the DC voltage signal is provided on the wire pair by power sourcing equipment (PSE) coupled to the surge protection device.

3. The surge protection device of claim 1 , wherein the DC voltage signal is provided by an external power supply switchably coupled to the surge protection device.

4. The surge protection device of claim 1 , further comprising a filter coupled between the isolating transformer and the power supply.

5. The surge protection device of claim 1 , wherein the fuse is configured to provide overload protection for a powered device (PD) coupled to the output port.

6. The surge protection device of claim 1 , wherein the isolating transformer provides at least 6 kiloVolts (kV) of ground potential rise (GPR) protection to the Ethernet equipment.

7. The surge protection device of claim 1 , wherein the power supply provides at least 6 kiloVolts (kV) of ground potential rise (GPR) protection to the Ethernet equipment.

8. The surge protection device of claim 1 , wherein the isolating transformer provides at least 6 kiloVolts (kV) of ground potential rise (GPR) protection to the Ethernet equipment, and the power supply simultaneously provides at least 6 kiloVolts (kV) of ground potential rise (GPR) protection to the Ethernet equipment.

9. The surge protection device of claim 1 , further comprising:
a PoE powered device (PD) interface configured to provide a PD interface to a power sourcing equipment (PSE) device coupled to the input port; and

a PoE power source equipment (PSE) interface configured to provide a PSE interface to a powered device (PD) coupled to the output port.

10. The surge protection device of claim 9 , further comprising a power supply lightning protection element coupled between the PoE power source equipment (PSE) interface and the output port.

11. A method for providing high voltage isolation and protection for a Power over Ethernet (PoE) device, comprising:
coupling Ethernet equipment to an isolation transformer configured to conduct an Ethernet data signal and configured to provide voltage surge protection for the Ethernet equipment;
coupling a power supply to the isolating transformer, the power supply configured to conduct a DC voltage signal and configured to provide voltage surge protection for the Ethernet equipment; and
providing at least 6 kiloVolts (kV) of ground potential rise (GPR) protection to the Ethernet equipment.

12. The method of claim 11 , wherein the DC voltage signal is provided by power sourcing equipment (PSE).

13. The method of claim 11 , wherein the DC voltage signal is provided by an external power supply.

14. A device, comprising:
means for using an isolation transformer configured to conduct an Ethernet data signal and configured to provide voltage surge protection for Ethernet equipment coupled to the isolation transformer;
means for coupling a power supply to the isolating transformer, the power supply configured to conduct a DC voltage signal and configured to provide voltage surge protection for the Ethernet equipment;
means for filtering the Ethernet data signal; and
means for filtering the DC voltage signal.

15. The device of claim 14 , further comprising means for providing at least 6 kiloVolts (kV) of ground potential rise (GPR) protection to the Ethernet equipment.

16. A surge protection device, comprising:
an isolating transformer configured to conduct an Ethernet data signal on a wire pair and configured to provide voltage surge protection for Ethernet equipment coupled to the wire pair;
a power supply coupled to the isolating transformer and configured to conduct a DC voltage signal from the wire pair and configured to provide voltage surge protection for the Ethernet equipment coupled to the wire pair; and
wherein the isolating transformer provides at least 6 kiloVolts (kV) of ground potential rise (GPR) protection to the Ethernet equipment.

17. The surge protection device of claim 16 , wherein the power supply provides at least 6 kiloVolts (kV) of ground potential rise (GPR) protection to the Ethernet equipment.

18. The surge protection device of claim 16 , wherein the DC voltage signal is provided on the wire pair by power sourcing equipment (PSE) coupled to the surge protection device.

19. The surge protection device of claim 16 , further comprising:
an input port coupled to the isolating transformer by the wire pair;
an output port coupled to the isolating transformer by a second wire pair;
a PoE powered device (PD) interface configured to provide a PD interface to a power sourcing equipment (PSE) device coupled to the input port; and

a PoE power source equipment (PSE) interface configured to provide a PSE interface to a powered device (PD) coupled to the output port.

20. The surge protection device of claim 19 , further comprising a power supply lightning protection element coupled between the PoE power source equipment (PSE) interface and the output port.

Assignees

• Adtran Inc

Inventors

• Wiese James B
• Joffe Daniel M
• Robinson Steven M

Classifications

• H02H9/04

  responsive to excess voltage (lightning arrestors H01C7/12, H01C8/04, H01G9/18, H01T) · CPC title

• H02H9/042

  comprising means to limit the absorbed power or indicate damaged over-voltage protection device · CPC title

• H02H7/22

  for distribution gear, e.g. bus-bar systems; for switching devices {(detecting mechanical or electrical defects in gas-insulated switchgears H02B13/065)} · CPC title

• H02H3/22

  of short duration, e.g. lightning · CPC title

• H02H9/005

  avoiding undesired transient conditions · CPC title