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Single Phase Surge Protective Device| LKX-C40 385V 2P Type 2
Type 2 Surge Protection
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Single Phase Surge Protective Device| LKX-C40 385V 2P Type 2

The Type 2 SPD Surge Protective Device 20–40kA 385V AC (LKX-C40) offers robust Class II transient overvoltage protection for 385V AC power systems, safeguarding equipment from switching surges, indirect lightning, and electrical noise disturbances. Equipped with high-energy MOV components, fast response time, thermal disconnection protection, and status indication windows, it ensures safe and reliable operation for residential and commercial distribution boards, industrial control cabinets, HVAC systems, EV chargers, and general 385V AC circuits.

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    product details
    01

    Product principle and working conditions

    1.Meets Class Ⅱ (8/20 μs) SPD tests
    2. Based on zinc oxide technology
    3. Using 34S MOV,the maximum will be up to 8/20μs 40ka
    4. No power frequency continuous flow
    5. Compact,yet high surge rated pluggable design,using minimum 35mm DIN rail width
    6.The operating environment temperature is -40℃~+80℃
    7.Red/Green status indication and change-over contacts standard for remote monitoring.(Remote function is Option)

    02

    Technical parameter details

    Technical Data
    POLE 2P/2+0
    Technology MOV(Metal Oxide Varistors) GDT
    Protection mode(s) L-PE/N-PE NPE
    Nominal voltage (A.C.)                                                             [Un] 220V 300V 380V 400V 225V
    Max.continuous operating voltage (D.C.)                                 [Ucpv] 275V 320V 385V 420V 225V
    Nominal discharge current(8/20μs)                                          [In] 20kA 20kA
    Max.discharge current (8/20μs)                                               [lmax] 40kA 40kA
    Protection level                                                                         [Up] ≤1.5kV ≤1.6kV ≤1.8kV ≤2.0kV ≤1.5kV
    Response time                                                                          [tA] ≤25ns  
    Temporary overvoltage(TOV) withstand - 5 sec                       [Ut] 335V 440V 440V 620V 335V
    Admissible short-circuit current                                                [lsccr] 25kA
    Max, backup fuse 63AgL/Gg

    03

    Mechanical Data

    Mechanical Data
    Current AC system
    SPD configuration Single/Three phase
    Pluggable Available
    Mounting 35mm DlN rail
    Housing material Thermoplastic,UL 94 V-O
    Operating temperature -40℃...+80℃
    Protection rating IP20
    Remote Signaling Green/Red
    Wiring for remote signaling Optional
    Max.Voltage/Current for remote signaling Max 1.5mm solid/flexible
    Standards compliance 250V/0.1A;125V/0.2A;75V/0.5A
    Certification CE,CB,RoHS,TUV
    04

    Outer appearance and installation dimensions

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    05

    Installation considerations

    1.Before installation, ensure power is disconnected. Operating while energized is strictly prohibited.
    2.It is recommended to install a fuse or circuit breaker in series at the front end of the surge protection module.
    3.Follow the installation diagram for connection during installation. Avoid incorrect connections. After installation, close the circuit breaker (or fuse) switch and check if the operation status is normal.
    4.After installation, insert the module into place and verify if the surge protection module is functioning correctly.
    5.During use, regularly inspect the surge protection module and check the status of the fault display window. If the fault display window turns red or if the remote signaling terminal outputs an alarm signal, it indicates a malfunction of the surge protection module, which should be promptly repaired or replaced.
    6.Parallel-connected power surge protection modules should be installed in parallel. The connection wires must be secure, reliable, short, thick, and straight.