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Product introduction
Germany DEHNventil M TT 255 (DV M TT 255), DEHNventil M TT 255 FM (DV M TT 255 FM) used for low voltage electrical equipment TT system module type composite lightning surge/surge protector, used in lightning protection partition OA - 2. Replace old type products DEHNventil TT 255 (900 375).
Function characteristics
? ? preliminary connection, the spark gap type composite lightning current/surge protector, the base and plug-in protection module
? ? RADAX Flow technology, has fly-wheel inhibition function, meet the system high reliability requirements
? ? short circuit current to 50 karms, 20 a gL/gG fuse don jump
? ? discharge capacity of 100 ka (10/350 μ s)
? ? can protect terminal equipment
? ? Windows indicating working state/fault condition
? ? with module lock device, through the module release button easily replace protection module
? ? through the impact and vibration test, on the basis of the EN60068-2
Technical parameters
DV M TT 255 DV M TT 255 FM
According to the EN 61643-11, SPD grade 1 grade 1
According to IEC 61643-1, SPD Ⅰ level Ⅰ level
Ac nominal voltage UN 230/400 v 230/400 v
Ac maximum continuous working voltage UC 255 v, 255 v
Lightning surge current (10/350 μ s) [L1 + L2 + L3 - N - PE] Itotal 100 ka 100 ka
Lightning surge current (10/350 μ s) [L - N] Iimp 25 ka 25 ka
Lightning surge current (10/350 μ s) [N - PE] Iimp 100 ka 100 ka
Nominal discharge current (8/20 μ s) In 25/100 ka 25/100 ka
Voltage protection level [L - PE] Up acuities were 1.5 kV acuities were 1.5 kV
Voltage protection level [N - PE] Up acuities were 1.5 kV acuities were 1.5 kV
Power frequency fly-wheel interrupting capacity [L - N] Ifi 50 karms 50 karms
Power frequency fly-wheel interrupting capacity [N - PE] Ifi and and
Fly-wheel inhibition/selective expected fly-wheel to 50 karms, 20 a fuse don jump expected fly-wheel to 50 karms, 20 a fuse don jump
Response time tA acuities 100 ns acuities 100 ns
Ik = 50 karms, maximum backup fuse (L) 315 a gL/gG 315 a gL/gG
Ik > 50 karms, maximum backup fuse (L) 200 a gL/gG 200 a gL/gG
Maximum backup fuse (L - L ) 125 a gL/gG 125 a gL/gG
Transient overvoltage (TOV) [L - N] UT 440 v / 5 SEC. 440 v / 5 SEC.
Transient overvoltage (TOV) [N - PE] UT 1200 v / 200 ms 1200 v / 200 ms
Working temperature range (parallel) TUP - 40 ℃... + 80 ℃ to 40 ℃... + 80 ℃
Working temperature range (series) TUS - 40 ℃... + 60 ℃ to 40 ℃... + 60 ℃
Working state/fault indicator green/red green/red
The minimum installation conductor sectional area (L1, L1, L2, L3, L2, L3 , N, N , PE, 〨) 10 best callus induction stranded wire/soft line 10 best callus induction stranded wire/soft line
Maximum installation conductor sectional area (L1, L2, L3, N, PE) 50 best callus induction stranded wire/best callus induction and soft line 50 best callus induction stranded wire/best callus induction and soft line
Maximum installation conductor sectional area (L1, L2, L3 , N , 〨) 50 best callus induction stranded wire / 25 best callus induction soft line 50 best callus induction stranded wire / 25 best callus induction soft line
Installation and mmdin rail, on the basis of the EN 60715 35 mmdin rail, on the basis of the EN 60715
Shell material red thermoplastic materials, UL 94-0 red thermoplastic materials, UL 94-0
Protection level IP 20 IP 20
Size 6 mods, DIN 43880 6 mods, DIN 43880
The authentication KEMA, VDE, UL, VdS KEMA, VDE, UL, VdS
Remote signalling contact type - float switch contact
Ac switching capacity - 250 v / 0.5 A
Dc switching capacity - 250 v / 0.1 A; 125 v / 0.2 A; 75 v / 0.5 A
Remote signalling terminal of the cross sectional area - maximum 1.5 the best callus induction stranded wire
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