Why Choose the Finder 7P.27.8.275.0020 Type 2 Surge Protection Device?
The Finder 7P.27.8.275.0020 is a Type 2 surge protection device (SPD) designed to protect single-phase TN-S electrical installations against transient overvoltages caused by lightning-induced surges and electrical switching operations. Part of the Finder 7P Series, this surge arrester features a two-varistor protection arrangement for systems with separate neutral and protective earth conductors.
Designed for 230 V AC single-phase electrical systems, the Finder 7P.27.8.275.0020 has a 275 V AC maximum continuous operating voltage (Uc), a 20 kA nominal discharge current (In) and a 40 kA maximum discharge current (Imax), measured using the 8/20 µs surge waveform. Its 1.5 kV voltage protection rating helps reduce the effects of transient overvoltages on connected electrical equipment.
The device incorporates replaceable varistor protection modules and local visual status indication, enabling maintenance personnel to identify when protective elements require replacement. Designed for 35 mm DIN rail mounting, it provides a practical solution for single-phase distribution boards, industrial control panels and commercial electrical installations.
Key Advantages
- Type 2 surge protection: Helps protect electrical installations against induced lightning surges and switching transients.
- Single-phase TN-S compatibility: Designed for electrical systems with separate neutral and protective earth conductors.
- Two-varistor protection: Provides surge protection through the device's specified L/N-to-PE arrangement.
- 20 kA nominal discharge current: Supports reliable handling of transient surge currents.
- 40 kA maximum discharge current: Provides additional capability against higher-energy transient events.
- 275 V AC continuous operating voltage: Suitable for compatible 230 V AC single-phase installations.
- 1.5 kV voltage protection rating: Helps limit surge voltages reaching downstream equipment.
- Replaceable varistor modules: Simplifies servicing without replacing the complete SPD assembly.
- Visual status indication: Allows local inspection of the condition of the protective elements.
- DIN rail mounting: Supports straightforward integration into compatible electrical distribution enclosures.
- IP20 ingress protection: Suitable for mounting within appropriately rated electrical enclosures.
- Wide operating temperature range: Designed for operation between −40 and +80 °C.
- Coordinated protection capability: Suitable for properly designed surge protection systems at LPZ 1 to LPZ 2 boundaries.
Key Features
- Finder 7P Series surge protection device.
- Type 2 SPD classification.
- Single-phase TN-S network application.
- 1+NPE protection arrangement.
- Two metal oxide varistor protection elements.
- 230 V AC nominal system voltage.
- 275 V AC maximum continuous operating voltage (Uc).
- 20 kA nominal discharge current (In), 8/20 µs.
- 40 kA maximum discharge current (Imax), 8/20 µs.
- 1.5 kV voltage protection rating.
- Replaceable varistor modules.
- Local visual protection status indication.
- No remote signalling contact on the .0020 version.
- 35 mm DIN rail mounting according to EN 60715.
- IP20 ingress protection.
- −40 to +80 °C operating temperature range.
- EN 61643-11:2012 compliance.
- EAN 8012823398167.
Technical Specifications
- Manufacturer: Finder
- Series: 7P Series
- Model: 7P.27.8.275.0020
- Manufacturer part number: 7P.27.8.275.0020
- Product type: Surge protection device
- SPD classification: Type 2
- Electrical system: Single-phase AC
- Compatible earthing system: TN-S
- Protection configuration: 1+NPE
- Number of protection elements: 2
- Protection technology: Metal oxide varistor
- Nominal system voltage: 230 V AC
- Maximum continuous operating voltage (Uc): 275 V AC
- Nominal discharge current (In), 8/20 µs: 20 kA
- Maximum discharge current (Imax), 8/20 µs: 40 kA
- Voltage protection rating: 1.5 kV
- Protection modules: Replaceable varistor cartridges
- Local status indication: Visual varistor condition indicator
- Remote signalling contact: No
- Mounting method: DIN rail
- DIN rail size: 35 mm
- Mounting standard: EN 60715
- Ingress protection: IP20
- Operating ambient temperature: −40 to +80 °C
- Applicable standard: EN 61643-11:2012
- Typical installation position: LPZ 1 to LPZ 2 transition
- EAN: 8012823398167
Reliable Type 2 Surge Protection for Single-Phase TN-S Electrical Installations
Electrical distribution systems are exposed to transient overvoltages resulting from lightning activity, electrical switching operations and disturbances within the supply network. These short-duration voltage peaks can damage sensitive electronic equipment, interrupt industrial processes and reduce the reliability of electrical installations. The Finder 7P.27.8.275.0020 Type 2 surge arrester is designed to help protect compatible single-phase TN-S systems against these disturbances.
The device uses two metal oxide varistor protection elements to respond rapidly to transient overvoltages and divert surge current through the protective circuit. Its 20 kA nominal discharge current and 40 kA maximum discharge current provide surge handling capability for appropriately selected Type 2 protection applications.
With a 275 V AC maximum continuous operating voltage, the Finder 7P.27.8.275.0020 is intended for compatible 230 V AC single-phase TN-S installations. The protection arrangement is designed for systems with neutral and protective earth conductors, helping limit the voltage stress imposed on connected equipment during transient surge events.
The replaceable varistor cartridges allow protective elements to be renewed when required, while the local visual indicators assist maintenance personnel in checking the device's condition. Its DIN rail mounting arrangement makes it suitable for electrical distribution boards and industrial control enclosures.
Installation consideration: The Finder 7P.27.8.275.0020 is a Type 2 SPD and must be selected according to the electrical system voltage, earthing arrangement, prospective fault current and required surge protection coordination. Any necessary upstream protective device must be selected in accordance with Finder's installation instructions. Installation and servicing should be carried out by a suitably qualified electrician.
Typical Applications
- Single-phase TN-S electrical distribution networks.
- 230 V AC electrical distribution boards.
- Commercial building electrical infrastructure.
- Industrial electrical control panels.
- Automation and machinery supply protection.
- Building management and monitoring systems.
- Electrical installations requiring Type 2 surge protection.
- Electrical distribution systems with separate neutral and protective earth conductors.
- Protection of sensitive electronic equipment against transient overvoltages.
- Coordinated surge protection at LPZ 1 to LPZ 2 boundaries.
- Electrical panel-building and OEM applications.
- Maintenance and replacement of electrical surge protection equipment.
