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DSH TT 255 Current & Surge Arrester
Brand: DEHN, IncApplication-optimized and prewired combined lightning current and surge arrester for TT and TN-S systems ("3+1" circuit).
Specifications
Brand
Approvals & Certifications
- CE
- KEMA
- UL
- VDE
Approvals & Certifications
- SPD According to EN 61643-11 (Typical 1 + Typical 2)
- SPD According to IEC 61643-11 (Class I + Class II)
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 Min.
- Cross-Sectional Area [L1, L2, L3, N, PE, Ground]: 35 mm² Stranded / 25 mm² Flexible, Max.
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