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Surge Arrester – Type 2

SLP20-275/1+1

SLP20-275/1S+1

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
Surge-protective-device-SLP20-275-1S+1-OBO
Dimensions-SLP20-275-1S+1-OBO
Dimensions
Basic-circuit-diagram-SLP20-275-1S+1-OBO
Basic circuit diagram

Technical data

TypeSLP20-275/1+1SLP20-275/1S+1
SPD according to EN 61643-11 / IEC 61643-11type 2 / class IItype 2 / class II
Nominal a.c. voltage Un275 V AC (48/62 Hz)275 V AC (48/62 Hz)
Max. continuous operating a.c. voltage [L-N] Uc320 V AC (48/62 Hz)320 V AC (48/62 Hz)
Max. continuous operating a.c. voltage [N-PE] Uc255 V AC (48/62 Hz)255 V AC (48/62 Hz)
Nominal discharge current (8/20μs) In10 kA10 kA
Maximum discharge current (8/20μs) Imax20 kA20 kA
Lightning impulse current (10/350μs) [N-PE] Iimp3 kA3 kA
Voltage Protection level [L-N] UP1,25 kV1,25 kV
Voltage Protection level [N-PE] UP1,5 kV1,5 kV
Follow current extinguishing capability [N-PE] Ifi100 Arms100 Arms
Response time [L-N] tA25 ns25 ns
Response time [N-PE] tA100 ns100 ns
Max. mains-side over-current protection125 A gL/gG125 A gL/gG
Short-circuit current rating ISCCR25 k Arms25 k Arms
Temporary overvoltage (TOV) [L-N] (UT) – Characteristic335 V / 5 sec. – withstand335 V / 5 sec. – withstand
Temporary overvoltage (TOV) [L-N] (UT) – Characteristic440 V / 120 min. – safe failure440 V / 120 min. – safe failure
Temporary overvoltage (TOV) [N-PE] (UT) – Characteristic1200 V / 200 ms – withstand1200 V / 200 ms – withstand
Range of operating temperatures (TU)-40/+80°C-40/+80°C
Operating state / fault indicationgreen / redgreen / red
Number of ports11
Cross-sectional area (min.)1.5 mm2 solid /flexible1.5 mm2 solid /flexible
Cross-sectional area (max.)35 mm2 stranded / 25 mm2 flexible35 mm2 stranded / 25 mm2 flexible
For mounting on35 mm DIN rail acc. to EN 6071535 mm DIN rail acc. to EN 60715
Enclosure materialthermoplasticthermoplastic
Place of installationindoor installationindoor installation
Degree of protectionIP 20IP 20
Capacity2 module(s), DIN 438802 module(s), DIN 43880
ApprovalsCECE
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

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Un = 275 Vac

Imax (8/20μs) = 20 kA

1P

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Un = 275 Vac

Imax (8/20μs) = 20 kA

2P, single-phase, for TN systems

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Un = 275 Vac

Iimp (10/350μs) = 20 kA

2+NPE, three-phase, for TT and TN-S systems

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Un = 275 Vac

Imax (8/20μs) = 20 kA

3P, three-phase, for TN-C systems

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SLP20-275/3S+1 (OBO)

Un = 275 Vac

Imax (8/20μs) = 20 kA

3+NPE, three-phase, for TT and TN-S systems

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Un = 275 Vac

Imax (8/20μs) = 20 kA

4P, three-phase, for TN-S systems