AC SPDs T1+T2 FLP25GR series

Home>>AC SPDs T1+T2 FLP25GR series

AC Surge Protective Device T1+T2 25kA FLP25GR series

Surge protective device SPD, arrester type 1+2 (class I+II, class B+C) for use in AC power supply systems.

The AC Surge Protective Device T1+T2 25kA FLP25GR line is a group of Class I+II Surge Protective Devices. They are intended as a protection against indirect and low-intensity direct hits of lightning strokes. In standard three-phase TN-C grid, they provide protection to LPL III, IV requirements given in EN 62305 with total lightning current introduced into electrical installation of 75 kA and total lightning stroke current 150 or 200 kA based on physical configuration and mutual position of grounding point of lightning rod, grounding point of the electrical installation and place of SPD installation.

The design of FLP25GR is based on Graphite (Spark Gap). Such design provides low-response time and ensures characteristics for both classes I and II. Prewired spark-gap-based type 1 and type 2 combined lightning current and surge arrester. Maximum systems availability due to RADAX Flow follows current limitation. Capable of protecting terminal equipment.

General parameters
Suitable for protection of electrical installations against transient overvoltage caused by direct and lightning strikes or switching processes
Due to Iimp 25 kA per module suitable for LPL I – IV according to EN 62305 in standard 3-phase TN-C and TN-S installations
Electrical parameters

1P, 2P, 3P, 4P, 1P+N, 2P+N, 3P+N

(L-N/PE/PEN connection)

1P+N, 2P+N, 3P+N

(N-PE connection)

SPD according to

EN 61643-11 / IEC 61643-11

Type 1+2 / Class I+II
Energy coordination with terminal equipment (< 5m)Type 1 + Type 2 + Type 3
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)25 kA100 kA
Max. impulse current Iimp (10/350 μs)25 kA100 kA
Impulse current specific energy W/R156,25 kJ/ohms2,5 MJ/ohms
Max discharge current Imax (8/20 μs)60 kA
Voltage protection level Up1.5 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 12.5 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 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 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 specific time should be based on the order quantity.

Packaging & Shipping

Packaging & Shipping

We promise to reply within 24 hours and ensure that your mailbox will not be used for any other purpose.

Leave A Comment

back to top