40kA, 8/20ms (L-N)
10kA, 8/20ms (N-E)

800V max

- The TERAS TLP275-40 surge protection provides good protection to sub distribution board or location described by IEC61643-1 test class II. It uses convinient plug-in module at DIN rail based.

- It provides indicators for power status and surge protection status. It provides protection for all modes.

- It uses Metal Oxide Varistor (MOV) with thermal protection fuse sealed with polyurethane compund (epoxy).

- Switchboard Protecion

- Outdoor& Indoor Cabinet

- Industrial Equipment Protection

- Telecommunication Equipment Protection

Description

Cooper cables from subscriber side are the main sources of surge entrance into telecommunication remote access network cabinet. In many situations, the primary protection at the Subscriber Distribution Frame (SDF) is not in place. Even when the Gas Discharge Tube (GDT) is in place, its protection performance is doubtful. In most surge cases, GDT is either not functioning at all or it's let voltage that is too high for our sensitive access equipment.

The CNP is specifically designed to divert the large surges away from access equipment and to provide a good coordination between internal protection devices in Subscriber Line Interface Circuit (SLIC). The low let through voltage of semiconductor devices surge protection will make sure that access equipment internal protection doesn't have to handle most of the surges.

Damages to ISDN cards in FTTS cabinet are increasing. The primary protection in SDF is either noot providing sufficient protection or it is not installed at all. Preliminary check on the ISDN cards shows that there are no secondary protections installed. Therefore these cards are critically exposed to the danger of lightning induced surges. To solve all the problems, a surge protection device that is not accessible to vendor or contractor (such as the common GDT in SDF) is needed.

• Offer much lower through voltage the GDT
• Easy installation by using pins at backboard of NEC module
• Eliminate possibility of misplaced or uninstalled by contractor of TM vendor as happens with GDT in SDF

This product is developed purposely for the protection of ISDN cards in Pernec DLC cabinet.

Lightning induced surges enter cabinet through copper cables. The surges will first enter SDF where normally Gas Discharge Tube (GDT) is installed. More often, the GDT is not installed. Even with the GDT installed, the performance is doubtful since the GDT is not well coordinated with the built in surge protection. The GDT let through voltage is usually very high which can affect the ISDN cards.

In the case of uninstalled CNP 101, the surges then travel to ISDN cards. Large surges will immediately destroy the cards while smaller surges will degrade it. With CNP 101 installed, the surge is diverted to the ground without affecting ISDN cards. The selection of protective device makes the let through voltage much smaller than what GDT can offer.

The installation of the product is made easy by using pins connection. The product is easily connected or disconnected to the protected circuit.