Furse lightning protectors for twisted pair data communication

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ESP 06D, ESP 15D, ESP 30D, ESP, 50D & ESP TN

Suitable for most twisted pair signalling applications.
Available for working voltages of up to 6, 15, 30 and 50 volts and telephone pairs with a maximum working or ringing voltage of 190 volts.

Derivatives of these protectors are available, ready-boxed to IP66, for use in damp or dirty environments - click here. If your system requires a protector with a very low resistance, higher current or higher bandwidth see here.

Application

Use on twisted pair lines to protect connected equipment from transient overvoltage damage. Typical uses include the protection of:

process control equipment
telemetry and SCADA
modems
computer communications interfaces

Features and benefits

Low let-through voltage restricts transient voltages to a safe level to ensure maximum protection for your systems.

Protection between all lines closes all transient paths to equipment for complete protection.

Provides repeated protection in lightning intense environments.

Low in-line resistance minimises unnecessary reductions in signal strength.

Strong, flame retardant, ABS housing.

Typical installation using CME 16 mounting and earthing kit

D TN Brochure

Twisted pair data communication, signal and telephone line connectors

Supplied ready for flat mounting on base or side.

Built-in DIN rail foot for simple clip-on mounting to top hat DIN rails.

Colour coded terminals give a quick and easy installation check - grey for the dirty (line) end and green for the clean end.

Protector mounting methods

Screen terminal enables easy connection of cable screen to earth.

Substantial earth stud to enable effective earthing.

Integral earthing plate enables enhanced connection to earth via CME kit.

Straightforward, comprehensive installation instructions.

UK Oftel Approval NS/G/1235/W/100025.

5 year warranty.

Installation

Installation diagram

Connect in series with the data communication or signal line either near where it enters or leaves the building or close to the equipment being protected (eg. within its control panel). Either way it must be very close to the systems earth star point. Install protectors either within an existing cabinet/cubicle or in a separate enclosure.

Suitable accessories

Simultaneously mount and earth up to 4 of these protectors on a CME 4, up to 8 on a CME 8, up to 16 on a CME 16, or up to 32 on a CME 32 (click here for detail).

Where Lightning Barriers cannot be incorporated within an existing panel or enclosure, WBX enclosures are available for a CME 4 and its associated protectors (WBX 4), CME 8 and protectors (WBX 8) or one or two CME 16 kits and protectors (WBX 16/2/G). Click here for details.

Electrical specification

	ESP 06D	ESP 15D	ESP 30D	ESP 50D	ESP TN
Nominal voltage¹	6V	15V	30V	50V	*
Maximum working voltage²	7.79V	19V	37.1V	58V	190V
Current rating (signal)	300mA	300mA	300mA	300mA	300mA
In-line resistance (per line ± 10%)	9.4ohm	9.4ohm	9.4ohm	9.4ohm	4.4ohm
Bandwidth (-3dB 50ohm system)	800kHz	2.5MHz	4MHz	6MHz	>50MHz

1 Nominal voltage (DC or AC peak) measured at <5µA (ESP 15D, ESP 30D, ESP 50D) and <200µA (ESP 06D).
2 Maximum working voltage (DC or AC peak) measured at <1mA leakage (ESP 15D, ESP 30D, ESP 50D), <10mA (ESP 06D) and <95µA (ESP TN).
* Post transient recovery voltage >80V.

Transient specification

	ESP 06D	ESP 15D	ESP 30D	ESP 50D	ESP TN
Let-through voltage (all conductors)¹ 5kV, 10/700µs test to: BS6651:1999 Appendix C, Cat C-High ITU (formerly CCITT) IX K17	10.5V	23.8V	43.4V	74.9V	200V
Maximum surge current² -per signal wire -per pair	10kA 20kA	10kA 20kA	10kA 20kA	10kA 20kA	10kA 20kA

1 The maximum transient voltage let-through the protector throughout the test (+/-10%), line to line & line to earth. Response time <10ns.
2 Tested with 8/20µs waveshape to ITU (formely CCITT), BS 6651:1999 Appendix C.

Mechanical specification

	ESP 06D	ESP 15D	ESP 30D	ESP 50D	ESP TN
Temperature range	-25°C to +70°C	-25°C to +70°C	-25°C to +70°C	-25°C to +70°C	-25°C to +70°C
Connection type	Screw terminal	Screw terminal	Screw terminal	Screw terminal	Screw terminal
Connection size (stranded	1.5mm²	1.5mm²	1.5mm²	1.5mm²	1.5mm²
Earth connection	M6 stud	M6 stud	M6 stud	M6 stud	M6 stud
Weight -unit -packaged (per 10)	0.08kg 0.85kg	0.08kg 0.85kg	0.08kg 0.85kg	0.08kg 0.85kg	0.08kg 0.85kg
Dimensions

D TN Brochure