DSH TT 255 Current & Surge Arrester

Brand: DEHN, Inc.

Application-optimized and prewired combined lightning current and surge arrester for TT and TN-S systems ("3+1" circuit).

Specifications

Brand

Approvals & Certifications

  • SPD According to EN 61643-11 (Typical 1 + Typical 2)
  • SPD According to IEC 61643-11 (Class I + Class II)

Approvals & Certifications

  • CE
  • KEMA
  • UL
  • VDE

Current

  • (Lightning Impulse Current [10/350 µs] & Nominal Discharge Current [8/20 µs]) [L-N] / [N-PE]: 12.5 KA / 50 KA (Specific Energy [L-N] / [N-PE] (W/R): 39.06 KJ / ohms / 625 KJ / ohms)
  • Follow Current Extinguishing Capability [L-N] / [N-PE]: 25 KAᵣₘₛ / 100 Aᵣₘₛ
  • Follow Current Limitation/Selectivity: No Tripping of a 32 A GL/gG Fuse up to 25 KAᵣₘₛ (Prospective)
  • Lightning Impulse Current (10/350 µs) [L1+L2+L3+N-PE]: 50 KA (Specific Energy [L1+L2+L3+N-PE] (W/R: 625 KJ/ohms)
  • Maximum

Electrical Connectors

  • Cross-Sectional Area [L1, L2, L3, N, PE, Ground]: 1.5 mm² Solid/Flexible Minimum
  • Cross-Sectional Area [L1, L2, L3, N, PE, Ground]: 35 mm² Stranded / 25 mm² Flexible, Maximum

Enclosure, Body Material

  • ThermoPlastic

Environmental Protection

  • IP20

Indication

  • Fault Indication / Operating State: Red/Green

Mounting

  • 1.37" (35 mm) DIN Rails According to EN 60715

Operating Temperature

  • -40° to 80° C (-40° to 176° F)

Operating Voltages

  • Maximum

Response Time

  • ≤ 100 Nanoseconds

Voltage

  • Nominal Voltage: 230 Vac (50/60 Hz)
  • Nominal Voltage: 400 Vac (50/60 Hz)
  • Temporary Overvoltage (TOV) [L-N] - Characteristic: 440 V / 120 minutes - Withstand
  • Temporary Overvoltage (TOV) [N-PE] - Characteristic: 1,200 V / 200 milliseconds - Withstand
  • Voltage Protection Level [L-N] / [N-PE]: ≤ 1.5 kV

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