Series Telecom Line Protection – WSPTLP

The A.N Wallis WSPTLP Series – telecommunication line surge suppressors are designed to provide complete system protection for business PABX and single line applications.

This series of Telecom Line Protectors are designed to the recommendations of BS6651: 1999 (Annex C) for location category C which requires 10kA (8/20μs) surge capacity. These products are primary rated devices for protecting systems connected to dial-up PSTN (or “external”) lines or where PABX extensions are routed between buildings.

Conventional telecom surge suppressors such as gas discharge tubes (GDT’s) or metal oxide varistors (MOV’s) exhibit a higher clamping or “let-through” voltage with respect to fast acting solid state devices. In other words, they are designed to clamp voltages somewhere above the largest expected line signal, i.e. the voice line ringing signal. Consequently, the suppressor allows harmful spikes of up to 500V to attack the equipment.

The WSPTLP Series uses a combination of GDT’s and fast acting solid state devices to seriously enhance the protection provided.

The combination of GDT and fast acting solid state technology offers the benefits of a higher surge withstand capability together with lower clamping level and extremely fast reaction time. This means the WSPTLP Series offers much improved equipment protection and reduced component fatigue.

Applications include:

• Private Automatic Branch Exchange systems (PABX)
• Voice lines on the public network (PTSN)
• Fax
• Modem/Router

Features:

• Rugged construction
• High surge handling capabilities
• Low “let through” voltages.
• Fast response times.
• High surge handling capabilities.
• Negligible effect on normal line operation.
• Many models offer lower line resistance and higher line current capability than most other competitors’ products.

DIN rail mount models:

• DIN rail mounting for modular installation
• DIN rail earthing provided for ease of installation
• Panel mounting screw holes for permanent installation
• Additional earth stud provided for installation versatility
• WSPTLP/4 provided with two part push in screw terminal connection for ease of installation or replacement

Revision: ANW-v1, 30/07/18 Information subject to change without notice.

All of the above information, including drawings, illustrations and graphic designs, reflects our present understanding and is to the best of our knowledge and belief correct and reliable. Users, however, should independently evaluate the suitability of each product for the desired application.