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  • New item   Replacement SPD module Type 1+2 | Iimp 7 kA | Imax 50 kA | Uc 275 V | LSP FLP7-275/0

    Replacement SPD module Type 1+2 | Iimp 7 kA | Imax 50 kA | Uc 275 V | LSP FLP7-275/0

    Code: FLP7-275/0
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    LSP FLP7-275/0 is a replacement Type 1+2 plug-in module for FLP7-275 series bases. When the indicator turns red, pull out the module and insert a new one – no rewiring, the base stays.

  • Product description

    Replacement SPD module Type 1+2 | Iimp 7 kA | Imax 50 kA | Uc 275 V | LSP FLP7-275/0

    LSP FLP7-275/0 is a replacement Type 1+2 plug-in module for FLP7-275 series bases. When the indicator turns red, pull out the module and insert a new one – no rewiring, the base stays.

    Key point:
    A spare module cuts downtime to a minute: isolate the SPD backup fuse, pull out the tripped module, insert the new one – protection is back and the rest of the board stays in service.
    Class
    Type 1+2 / Class I+II / B+C
    Iimp (10/350 µs)
    7 kA
    Up
    ≤ 1.5 kV
    Fits bases
    FLP7-275

    Operating principle

    The module plugs into an FLP7-275 series base (1P, 3P or 4P, with or without S contact) without tools – the connections in the base remain untouched.

    Inside the module is a high-energy varistor with a thermal disconnector. The surge is diverted through the base terminals to PE or PEN.

    When the varistor wears out, the thermal disconnector disconnects it, the window turns red and the S base contact changes over.

    What does LSP FLP7-275/0 do for you?
    LSP FLP7-275/0 restores protection within a minute: no need to buy a whole base, disconnect wires or shut down the switchboard – only the tripped module is replaced.

    Technical specifications

    Product type Replacement SPD module Type 1+2
    Manufacturer / model LSP FLP7-275/0
    Class (IEC / EN 61643-11) Type 1+2 / Class I+II / B+C
    Poles / configuration Replacement plug-in module for FLP7-275 bases
    Nominal voltage Un 230 V AC
    Max. continuous operating voltage Uc 275 V AC
    Impulse current Iimp (10/350 µs) 7 kA
    Nominal discharge current In (8/20 µs) 20 kA
    Max. discharge current Imax (8/20 µs) 50 kA
    Voltage protection level Up ≤ 1.5 kV
    Remote signalling contact The signalling contact is in the base (S versions); the module fits FLP7-275/1, /3, /4 and their S bases
    Protective element High-energy varistor (MOV), plug-in module
    Standard IEC 61643-11:2011, EN 61643-11:2012

    Main functions

    • Iimp 7 kA (10/350 µs) – the same as the module of a new FLP7-275 base.
    • Imax 50 kA (8/20 µs) – withstands strong switching impulses.
    • Thermal disconnector – a worn varistor disconnects safely.
    • Status window – green / red on the front of the module.
    • Fits all FLP7-275 bases – 1P, 3P, 4P and S versions.

    How does it differ from similar models?

    • LSP FLP7-275/1 – 1P | Iimp 7 kA | Up ≤ 1.5 kV – Base this module fits.
    • LSP FLP7-275/4S – 4P TN-S | Iimp 7 kA | Up ≤ 1.5 kV – Base this module fits.
    • LSP FLP7-275/3S – 3P TN-C | Iimp 7 kA | Up ≤ 1.5 kV – Base this module fits.

    Where is it used?

    • Replacing a tripped FLP7-275 module after a storm
    • Spare module at sites without permanent staff
    • Scheduled SPD inspection and replacement of worn modules
    • Spare stock for switchboard maintenance companies
    • Spare-parts kit for panel builders
    • Refurbishing SPDs without replacing the base

    Selection and installation

    • Pick the scheme by network type: TN-C – 3P between L and PEN, TN-S – 4P (4+0), TT – only "3+1" with an N–PE spark gap.
    • With an external LPS the value depends on the lightning protection level (LPL): LPL III–IV usually needs 12.5 kA per pole, LPL I–II needs more – we will calculate it.
    • Choose 5–8 kA per pole models where there is no LPS and the threat comes through an overhead line.
    • Install the SPD at the incomer upstream of the RCD (or after an S-type RCD) so that the discharge current does not pass through the RCD.
    • Backup fuse – within the manufacturer limit; if the incoming fuse is larger, give the SPD its own fuse (e.g. 125 A gG).

    Use by need

    For the site owner.
    A spare module in stock – protection is restored the same day.
    For the electrician.
    Replacement without disconnecting wires: only the SPD fuse is switched off.
    For the maintenance company.
    One part number for all FLP7-275 bases – simpler spare stock.

    Practical application

    If after a storm one pole's window on an FLP7-275/4S base is red, switch off the SPD backup fuse, pull out that module, insert an FLP7-275/0 and switch back on – the other modules and wires stay in place.

    Pros

    • Fast restoration of protection
    • No need to replace the base or wiring
    • Fits all FLP7-275 bases
    • Thermal disconnector and indication

    Cons / limitations

    • Fits FLP7-275 series bases only
    • The signalling contact is in the base, not in the module
    • Not used on its own without a base

    ⚡ Safety and installation notes

    • Before replacing the module, switch off the SPD backup fuse or switch.
    • Make sure the module type and Uc match the base (FLP7-275).
    • Insert the module fully – a partly inserted module does not protect.
    • After replacement, check that the windows of all poles are green.
    ☝ From experience
    • Keep the leads to the SPD and from it to PE as short as possible – total length up to 0.5 m. Every extra metre adds about 1 kV to Up and the protection loses its point.
    • Run the PE conductor straight to the main earthing bar, not through other devices' terminals. In a Type 1 circuit use at least 16 mm² Cu.
    • Pull out the modules or disconnect the SPD before an insulation resistance test (500–1000 V) – otherwise the tester shows "leakage" and the modules may be damaged.
    • Check the indicator after every storm and at least once a year. Keep a spare module on site – replacement takes a minute: isolate only the SPD backup fuse or MCB, the rest of the board can stay in service.
    • If the sub-boards are more than 10 m away or feed sensitive electronics, add a separate Type 2 or Type 3 SPD there – the incomer alone is not enough.
    ☝ Elsprendimai.eu recommends: It is also worth keeping spare fuses for the SPD circuit, and if the base is not yet an S version, consider the FLP7-275/4S with signalling contact.

    Quick selection guide

    Type 1+2 / Class I+II / B+C
    7 kA
    ≤ 1.5 kV
    FLP7-275

    Suitable when you need:

    • To replace a tripped FLP7-275 module
    • To keep a spare module on site
    • To restore protection without shutting down the switchboard

    Check before use:

    • Base type – FLP7-275
    • Which pole has tripped (red window)
    • Whether the backup fuse has blown

    Important reminder: The module does not replace the complete SPD – it can only be used with an FLP7-275 base.

    FAQ

    Does it fit the FLP12.5 base?
    No, the FLP7-275/0 is intended for FLP7-275 series bases only.
    Does the whole switchboard need to be switched off for replacement?
    No, switching off the SPD backup fuse or switch is enough.
    How many modules does a 4P base need?
    Four, but only those with a red window are replaced.
    Does the module have a signalling contact?
    No, the contact is in the S version base and is actuated by the module status.
    How do I know the module needs replacing?
    The window on the front of the module turns red and the S base contact changes over.
    Can it be stored for a long time?
    Yes, in a dry room; before installation check that the window is green.
    Not sure which one to choose? See the Type 1+2 SPD selection guide or contact us – we will select it from your board diagram.

    Documents and sources

    Checked 2026-10-17.

    Replacement SPD module Type 1+2 | Iimp 7 kA | Imax 50 kA | Uc 275 V | LSP FLP7-275/0

    LSP FLP7-275/0 – plug-in T1+T2 module for FLP7-275 bases: Iimp 7 kA, Imax 50 kA. Protection is restored within a minute, without disconnecting wires.

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

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