AC Surge Protection Device Class B, I, T1 50kA FLP50GR series

Surge protective device SPD, arrester type 1 (class I, class B) for use in AC power supply systems.

Surge protection portfolio includes solutions for protecting systems up to 600 V a.c. against surges caused by atmospheric discharge and switching operations.
LSP is the line of AC power surge protectors is designed to cover all possible configurations in low voltage installations. They are available in many versions, which differ in

  • Type 1
  • AC network configuration (Single/3-Phase)
  • Discharge currents (Iimp, Imax, In)
  • Protection technology (varistors, GDT, graphite)
  • Feature (compact)

The AC Surge Protection Device T1 50kA FLP50GR line is a group of Class I Surge Protective Devices. They are intended as protection against direct hit of lightning strokes of high intensities or in installation with frequent occurrence of lightning strokes. In standard three-phase TN-C grid, they provide protection over LPL I requirements given in EN 62305 with total lightning current introduced into electrical installation over 100 kA and total lightning stroke current 210 or 280 kA based on physical configuration and mutual position of grounding point of the lightning rod, grounding point of the electrical installation and place of SPD installation.

The design of AC Surge Protection Device T1 50kA FLP50GR is fully based on the Spark Gap solution. It brings very high capability and lifetime and full insulation in case of no overvoltage is present. Thus, these SPDs can be used also upstream to energy meters and can be intended for IT grids (with respective special tests).

The high value of Iimp makes these SPDs suitable also for single-phase outlets which are wired out of LPZ 0-1 and thus can be hit with a direct lightning stroke. Due to the single-phase cable, the total lightning current is split to 3 conductors only and intensity per conductor is thus higher than in the case of ongoing three-phase cable.

General parameters
Suitable for protection of electrical installation against the effects of atmospheric overvoltage when a direct lightning

strike to the building equipped with a lightning rod or lightning to the outdoor power line

Due to Iimp 50 kA per module suitable for LPL I – IV according to EN 62305 in standard 3-phase TN-C and TN-S installations
Electrical parameters

1+0, 2+0, 3+0, 4+0, 1+1, 2+1, 3+1

(L-N/PE/PEN connection)

1+1, 2+1, 3+1

(N-PE connection)

SPD according to

EN 61643-11 / IEC 61643-11

Type 1
Nominal a.c. voltage Un120 V AC  ①230 V AC  ②230 V AC  ③230 V AC
230 V AC  ④400 V AC  ⑤480 V AC  ⑥
Max. continuous operational voltage Uc150 V AC  ①275 V AC  ②320 V AC  ③255 V AC
385 V AC  ④440 V AC  ⑤600 V AC  ⑥
Nominal frequency f50 / 60 Hz
Nominal discharge current In (8/20 μs)50 kA100 kA
Max. impulse current Iimp (10/350 μs)50 kA100 kA
Impulse current specific energy W/R156,25 kJ/ohms2,5 MJ/ohms
Max discharge current Imax (8/20 μs)
Voltage protection level Up2.0 kV1.5 kV
Follow current extinguishing capability Ifi50 Arms / 100 Arms
Follow current limitation / Selectivityno tripping of a 20 A gL/gG fuse up to 50 k Arms (prosp.)
Temporary overvoltage (TOV) (UT )

– Characteristic (withstand)

230 V / 5 sec  ①530 V / 5 sec  ②530 V / 5 sec  ③1200 V / 200 ms
530 V / 5 sec  ④765 V / 5 sec  ⑤915 V / 5 sec  ⑥
Response time ta≤ 100 ns
Max. backup fuse (L) up to I = 50 kArms

315 A gL/gG

Max. backup fuse (L-L’)125 A gL/gG
Number of ports1
Type of LV systemTN-C, TN-S, TT (1P+N, 3P+N)
Protection functionOvercurrent
Mechanical parameters
Device length90 mm
Device width36, 72, 108, 144 mm
Device height65 mm
Method of mountingfixed
Degree of protectionIP 20
Cross-sectional area (min.)10 mm2 solid /flexible
Cross-sectional area (max.)35 mm2 stranded / 25 mm2 flexible
For mounting on35 mm DIN rail acc. to EN 60715
Enclosure materialthermoplastic
Place of installationinstallation indoor
Range of operating temperatures Tu-40 °C … +70 °C
Atmospheric pressure and altitude80k Pa … 106k Pa, -500 m … 2000 m
Humidity range5% … 95%


Q1: Selection of surge protector

Al: The grading of the surge protector (commonly known as lightning protection) Is assessed according to the IEC61024 subdivision lightning protection theory, which is installed at the junction of the partition. Technical requirements and functions differ. The first-stage lightning protection device is installed between the 0-1 zone, high for the flow requirement, the minimum requirement of EN 61643-11 / IEC 61643-11 is 50 ka (10/350), and the second and third levels are installed between the 1-2 and 2-3 zones, mainly to suppress the overvoltage.

Q2: Are you a lightning surge protectors factory or lightning surge protectors trading company?

A2: We are a lightning surge protectors manufacturer.

Q3: Warranty and services:

A3:1. Warranty 5 years

2. lightning surge protectors products and accessories have been tested 3 times before ship out.

3. We own the best after-sale service team, if any problem happens, our team will do our best to solve it for you.

Q4: How can I get some lightning surge protectors samples?

A4: We are honored to offer you lightning surge protectors samples, pis contact our staff and leave detailed contact information, we promise to keep your information confidential.

Q5: Is the sample available and free?

AS: Sample is available, but the sample cost should be payable by you. The cost of the sample will be refunded after further order.

Q6: Do you accept customized order?

A6: Yes, we do.

Q7: What’s the delivery time?

A7: It usually takes 7-15days after confirming payment, but the specific time should be based on the order quantity.

Packaging & Shipping

Packaging & Shipping

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