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Surge Arrester

AC surge protector panel – CAC7-275

AC surge protector panel are designed to protect against the over-voltages caused by lightning.

  • Protection against the over-voltages
  • Compliant with the EN 61643-11 / IEC 61643-11 standard
  • Line and differential breaker
  • Connection to network

Wiring diagram

Basic circuit diagram

Main components of AC surge protector panel:

Wiring diagram-CAC7-275
Basic circuit diagram

Waterproof Electrical Junction Box

Protection LevelIP65
Operating Temperature-20°C / 80°C
Size245 * 145 * 135 mm

 Mini Circuit Breaker (MCB)

Number of poles2P
Rated Current (A)16 A
Breaking Capacity(ICU)6 kA / 10kA
Breaking capacity of rated operating short circuit (ICS)7500 A
Rated Voltage (V)230 / 400 V

AC Contactor

Rated control supply voltage US at AC 50Hz 220 / 440 V
Rated operation current Ie at AC-3, 400 V12 A
Rated operation current Ie at AC-1, 400 V25 A
Rated operation power at AC-3, 400 V5.5 kW
Number of normally closed contacts as main contact2
Number of main contacts as normally open contact2
Rated voltage of the control coil (V)120 V / 208 V / 240 V

PVC Coated Copper Wire

Length2 m * 2 PCS
Cross-sectional area1 mm2 flexible


Surge Protective Device

FLP7-275/1S+1+Spare module

Modular surge arrester for use in single-phase TT and TN systems (“1+1” circuit); with floating remote signalling contact.

  • Prewired complete unit consisting of a base part and plug-in protection modules
  • High discharge capacity due to heavy duty zinc oxide varistors / spark gaps
  • High reliability due to “Thermo Dynamic Control” SPD monitoring device

Technical data

TypeFLP7-275/1S+1+Spare module
SPD according to EN 61643-11 / IEC 61643-11type 1 + type 2 / class I + II
Nominal a.c. voltage Un275 V AC (48/62 Hz)
Max. continuous operating a.c. voltage [L-N] Uc320 V AC (48/62 Hz)
Max. continuous operating a.c. voltage [N-PE] Uc255 V AC (48/62 Hz)
Nominal discharge current (8/20μs) In30 kA
Maximum discharge current (8/20μs) Imax60 kA
Lightning impulse current (10/350μs) [L-N] Iimp7 kA
Lightning impulse current (10/350μs) [N-PE] Iimp25 kA
Voltage Protection level [L-N] Up1,8 kV
Voltage Protection level [N-PE]  Up1,5 kV
Follow current extinguishing capability [N-PE] Ifi100 Arms
Response time [L-N] tA25 ns
Response time [N-PE] tA100 ns
Max. mains-side over-current protection160 A gL/gG
Short-circuit current rating ISCCR50 kA
Temporary overvoltage (TOV) [L-N] (UT) – Characteristic335 V / 5 sec. – withstand
Temporary overvoltage (TOV) [L-N] (UT) – Characteristic440 V / 120 min. – safe failure
Temporary overvoltage (TOV) [N-PE] (UT) – Characteristic1200 V / 200 ms – withstand
Range of operating temperatures (TU)-40/+80°C
Operating state / fault indicationgreen / red
Number of ports1
Cross-sectional area (min.)1.5 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 installationindoor installation
Degree of protectionIP 20
Capacity3 module(s), DIN 43880
Type of remote signalling contactchangeover contact
a.c. switching capacity250V / 0.5 A
d.c. switching capacity250V / 0.1 A; 125 V / 0.2 A; 75 V / 0.5 A
Cross-sectional area for remote signalling terminalsmax. 1.5 mm2 solid / flexible