Why Choose the Finder 7P.23.8.150.1015 Type 2 Surge Protection Device?
The Finder 7P.23.8.150.1015 is a three-pole Type 2 surge protection device (SPD) designed to protect compatible three-phase electrical installations against transient overvoltages caused by electrical switching operations and induced lightning surges. Part of the Finder 7P Series, this surge arrester combines three varistor protection modules, visual status indication and remote signalling capability in a compact DIN rail-mounted assembly.
Featuring a 150 V AC maximum continuous operating voltage (Uc), the Finder 7P.23.8.150.1015 is designed for compatible lower-voltage three-phase systems. It provides a 15 kA nominal discharge current (In) and a 40 kA maximum discharge current (Imax), measured using the 8/20 µs surge waveform.
The device incorporates replaceable varistor modules, allowing individual protective elements to be replaced when required. Its visual status indicators and remote signalling contact help maintenance personnel monitor the condition of the surge protection system, making it suitable for electrical distribution boards, industrial control panels and commercial electrical infrastructure.
Key Advantages
- Type 2 surge protection: Protects compatible electrical installations against switching transients and induced lightning overvoltages.
- Three-pole configuration: Provides surge protection for three phase conductors.
- 150 V AC maximum continuous operating voltage: Suitable for appropriately rated lower-voltage AC systems.
- 15 kA nominal discharge current: Provides surge current handling capability for Type 2 protection applications.
- 40 kA maximum discharge current: Supports protection against higher-energy transient surge events.
- Varistor-based technology: Provides rapid response to transient overvoltages.
- Replaceable protection modules: Simplifies maintenance without requiring replacement of the complete SPD assembly.
- Visual status indication: Allows straightforward inspection of varistor condition.
- Remote signalling capability: Enables integration with compatible monitoring and alarm systems.
- DIN rail mounting: Supports installation in standard electrical distribution and control enclosures.
- Three-module construction: Provides a compact mounting arrangement.
- Suitable for coordinated surge protection: Can form part of a properly designed multi-stage surge protection system.
Key Features
- Finder 7P Series surge protection device.
- Type 2 SPD classification.
- Three-pole protection arrangement.
- Three metal oxide varistor protection modules.
- 150 V AC maximum continuous operating voltage (Uc).
- 15 kA nominal discharge current (In), 8/20 µs.
- 40 kA maximum discharge current (Imax), 8/20 µs.
- 0.74 kV voltage protection level (Up).
- 0.6 kV voltage protection level at 5 kA.
- Replaceable varistor cartridges.
- Visual varistor condition indication.
- Remote status signalling contact.
- 35 mm DIN rail mounting.
- Three-module housing format.
- IP20 ingress protection.
- Suitable for electrical distribution and industrial control panels.
Technical Specifications
- Manufacturer: Finder
- Series: 7P Series
- Model: 7P.23.8.150.1015
- Manufacturer part number: 7P.23.8.150.1015
- Product type: Surge protection device
- SPD classification: Type 2
- Electrical system: Three-phase AC
- Number of poles: 3
- Protection technology: Metal oxide varistor
- Protection configuration: Three varistors
- Nominal system voltage: 120 V AC
- Maximum continuous operating voltage (Uc): 150 V AC
- Nominal discharge current (In), 8/20 µs: 15 kA
- Maximum discharge current (Imax), 8/20 µs: 40 kA
- Voltage protection level (Up): 0.74 kV
- Voltage protection level at 5 kA (Up5): 0.6 kV
- Protection modules: Replaceable varistor cartridges
- Local status indication: Visual varistor condition indicator
- Remote signalling: Yes
- Remote contact configuration: 1 changeover contact
- Remote contact rated voltage: 250 V AC / 30 V DC
- Remote contact rated current: 0.5 A AC / 0.1 A DC
- Mounting: 35 mm DIN rail according to EN 60715
- Modular width: 3 DIN modules
- Ingress protection: IP20
- Operating ambient temperature: −40 to +80 °C
- Application: Low-voltage electrical distribution surge protection
Three-Phase Surge Protection with Remote Status Monitoring
Transient overvoltages can occur in electrical distribution systems as a result of lightning activity, electrical switching operations and disturbances in connected equipment. These short-duration voltage peaks can damage electronic components, disrupt industrial processes and reduce the reliability of electrical installations. The Finder 7P.23.8.150.1015 is designed to limit such transient overvoltages in compatible three-phase electrical systems.
Its three metal oxide varistors respond to excessive voltage by conducting surge current away from the protected circuit. The specified 15 kA nominal discharge current and 40 kA maximum discharge current provide protection capability for appropriately selected Type 2 SPD applications.
The device is intended for installation in a suitable electrical distribution enclosure, typically at a surge protection zone transition such as LPZ 1 to LPZ 2. Its replaceable modules allow maintenance personnel to renew protective elements following end-of-life indication, while the remote signalling contact enables the SPD's condition to be monitored through compatible control and alarm systems.
Installation consideration: The 150 V AC maximum continuous operating voltage must be checked against the actual system voltage and earthing arrangement. This model should not be selected solely because the installation is three-phase; it must be compatible with the voltage present across each protected connection. Upstream protection, prospective fault current and SPD coordination must also be considered according to Finder's installation instructions.
Typical Applications
- Compatible three-phase low-voltage AC distribution systems.
- Electrical distribution boards and switchgear assemblies.
- Industrial control panels.
- Automation and machinery electrical installations.
- Commercial building electrical infrastructure.
- Electrical installations requiring Type 2 surge protection.
- Control systems requiring remote SPD condition monitoring.
- Electrical distribution systems with 120 V AC nominal protection requirements.
- Industrial equipment supply protection.
- Building management and monitoring systems.
- Preventive maintenance programmes for electrical infrastructure.
- Electrical panel-building and OEM applications.
