DEHNventil M TT (FM)

DEHNventil M TT (FM)                  Dimension drawing DV M TT 255 (FM)    Basic circuit diagram DV M TT 255 FM 

DV M TT 255 (FM): Modular combined lightning current and surge arrester for use in TT and TN-S systems (3+1 circuit)

	DV M TT 255	DV M TT 255 FM
SPD according to EN 61643-11	Type 1	Type 1
SPD according to IEC 61643-1	Class I	Class I
Energy-coordinated protection effect with regard to the terminal equipment	Type 1 + Type 2	Type 1 + Type 2
Energy-coordinated protection effect with regard to the terminal equipment (≤ 5m)	Type 1 + Type 2 + Type 3	Type 1 + Type 2 + Type 3
Nominal a.c. voltage     [UN]	230 / 400 V	230 / 400 V
Max. continuous operating a.c. voltage     [UC]	255 V	255 V
Lightning impulse current (10/350 µs) [L1+L2+L3+N-PE]     [Itotal]	100 kA	100 kA
Lightning impulse current (10/350 µs) [L-N]     [Iimp]	25 kA	25 kA
Lightning impulse current (10/350 µs) [N-PE]     [Iimp]	100 kA	100 kA
Nominal discharge current (8/20 µs)     [In]	25 / 100 kA	25 / 100 kA
Voltage protection level [L-N]     [UP]	≤ 1.5 kV	≤ 1.5 kV
Voltage protection level [N-PE]     [UP]	≤ 1.5 kV	≤ 1.5 kV
Follow current extinguishing capability [L-N] a.c.     [Ifi]	50 kArms	50 kArms
Follow current extinguishing capability [N-PE] a.c.     [Ifi]	100 Arms	100 Arms
Follow current limitation/Selectivity	no tripping of a 20 A gL/gG fuse up to 50 kArms (prosp.)	no tripping of a 20 A gL/gG fuse up to 50 kArms (prosp.)
Response time     [tA]	≤ 100 ns	≤ 100 ns
Max. backup fuse (L) up to IK = 50 kArms	315 A gL/gG	315 A gL/gG
Max. backup fuse (L) for IK > 50 kArms	200 A gL/gG	200 A gL/gG
Max. back-up fuse (L) up to IK = 25 kArms	A gL/gG	A gL/gG
Max. back-up fuse (L) up to IK = 25 kArms	A gL/gG	A gL/gG
Max. backup fuse (L-L´)	125 A gL/gG	125 A gL/gG
Temporary overvoltage (TOV) [L-N]     [UT]	440 V / 5 sec.	440 V / 5 sec.
Temporary overvoltage (TOV) [N-PE]     [UT]	1200 V / 200 ms	1200 V / 200 ms
Operating temperature range (parallel connection)     [TUP]	-40°C...+80°C	-40°C...+80°C
Operating temperature range (series connection)     [TUS]	-40°C...+60°C	-40°C...+60°C
Operating state/fault indication	green / red	green / red
Cross-sectional area (L1, L1, L2, L2, L3, L3, N, N, PE, )     [min.]	10 mm2 solid/flexible	10 mm2 solid/flexible
Cross-sectional area (L1, L2, L3, N, PE)     [max.]	50 mm2 stranded/35 mm2 flexible	50 mm2 stranded/35 mm2 flexible
Cross-sectional area (L1, L2, L3, N, )     [max.]	35 mm2 stranded/25 mm2 flexible	35 mm2 stranded/25 mm2 flexible
For mounting on	35 mm DIN rail acc. to EN 60715	35 mm DIN rail acc. to EN 60715
Enclosure material	red thermoplastic, UL 94 V-0	red thermoplastic, UL 94 V-0
Degree of protection	IP 20	IP 20
Dimension	8 mods., DIN 4	8 mods., DIN 4
Approvals, Certifications	KEMA, VDE, UL, VdS	KEMA, VDE, UL, VdS
Type of remote signalling contact	--	changeover contact
Switching capacity a.c.	--	250 V/0.5 A
Switching capacity d.c.	--	250 V/0.1 A; 125 V/0.2 A; 75 V/0.5 A
Cross-sectional area for remote signalling terminals	--	max. 1.5 mm2 solid/flexible
PU	1 pcs.	1 pcs.
ordering information
Type	DV M TT 255	DV M TT 255 FM
Part No.	951 310	951 315