Furse lightning protectors for twisted pair data and signal lines

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Use on twisted pair signalling applications which require either a lower in-line resistance or an increased current than the D or E Series.
Also suitable for DC power applications less than 4 amps.
Available for working voltages of up to 6, 15, 30 or 50 volts.

For some data and signal applications with lower current, higher in line resistance or higher bandwidth requirements, the D or E Series protectors may be more suitable. If the protector is to be mounted directly onto a PCB, use the ESP PCB/**D or ESP PCB/**E protectors.

Application

Use these applications to protect resistance sensitive or higher running current systems, eg systems with long signal lines, or DC power applications.

ESP 15H
Two ESP 15H protectors mounted in a control cabinet
and earthed via the cabinets' earthed chassis.

Features and benefits

Low let-through voltage between all lines.

Provides repeated protection in lightning intense environments.

Ultra low (<0.05Q) in-line resistance allows resistance critical applications (eg alarm loops) to be protected.

ESP30H

Very high (4A) maximum running current.

Strong, flame retardant ABS housing.

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 clean.

Screen terminal enables easy connection of cable screen to earth.

Substantial earth stud to enable effective earthing.

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

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

ESP H Range Brochure

Installation

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 the control panel). Either way, it must be very close to the system's 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 32on a CME 32. Enclosures suitable for up to two (WBX 2/G) or three (WBX 3/G) protectors, or a CME 8 and protectors (WBX 8) or one or two CME 16 kits and protectors (WBX 16/2/G).

Electrical specification

	ESP 06H	ESP15H	ESP30H	ESP50H
Nominal voltage¹	6V	15V	30V	50V
Maximum working voltage²	7.79V	16.7V	36.7V	56.7V
Current rating (signal)	4A	4A	4A	4A
In-line resistance (per line ± 10%)	<0.05ohms	<0.05ohms	<0.05ohms	<0.05 ohms
Bandwidth (-3dB 50ohm system	160kHz	140kHz	130kHz	120kHz

1 Nominal voltage (DC or AC peak) measured at <10µA (ESP 15H, ESP30H, ESP50H) and <200µA (ESP 06H).
2 Maximum working voltage (DC or AC peak) measured at <5mA leakage (ESP 15H, ESP 30H, ESP 50H) and <10mA (ESP 06H).

Transient specification

	ESP 06H	ESP15H	ESP30H	ESP50H
Let-through voltage (all conductors)¹ 5kV, 10/700µs test to: BS 6651:1999 Appendix C, Cat C-High ITU (formerly CCITT) IX K17	10.8V	26.2V	44.3V	65.8V
Maximum surge current -per signal wire -per pair	10kA 20kA	10kA 20kA	10kA 20kA	10kA 20kA

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

Mechanical specification

	ESP 06H	ESP15H	ESP30H	ESP50H
Temperature range	-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
Conductor size (stranded)	1.5mm²	1.5mm²	1.5mm²	1.5mm²
Earth connection	M6 stud	M6 stud	M6 stud	M6 stud
Weight -unit -packed (per 10)	0.08kg 0.85kg	0.08kg 0.85kg	0.08kg 0.85kg	0.08kg 0.85kg
Dimensions

ESP H Range Brochure