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Protection and safety
OVR Type 1+2 surge protective devices TNC 230 and 400 V networks

Technical features
Type codes OVR T1-T2 3L 25-255 P QS OVR T1-T2 3L 25-440 P QS OVR T1-T2 3L 12.5-275s P QS OVR T1-T2 3L 12.5-440s P QS
with auxiliary contact (TS) OVR T1-T2 3L 25-255 P TS QS OVR T1-T2 3L 25-440 P TS QS OVR T1-T2 3L 12.5-275s P TS QS OVR T1-T2 3L 12.5-440s P TS QS 5
Technology Varistor Varistor
Electrical features
Standard IEC 61643-11/EN 61643-11 IEC 61643-11/EN 61643-11 IEC 61643-11/EN 61643-11 IEC 61643-11/EN 61643-11
Type/test class T1-T2/I - II T1-T2/I - II T1-T2/I - II T1-T2/I - II
Protected lines 3 3 3 3
System network TNC TNC TNC TNC
Type of current AC 47-63 Hz AC 47-63 Hz AC 47-63 Hz AC 47-63 Hz
Voltage regulation of the system network ± 10 % ± 10 % ± 20 % ± 10 %
Nominal system voltage Un [V] 230/400 400/690 TNC, 230/400 (IT) 230/400 400/690 TNC, 230/400 (IT)
Max. cont. operating voltage Uc [V] 255 440 275 440
Maximum impulse current Iimp (10/350) [kA] 25 25 12.5 12.5
Max.Imp current Tot Iimp (10/350) [kA] - - 37.5 37.5
Nominal discharge current In (8/20) [kA] 25 25 20 20
Maximum discharge current Imax (8/20) [kA] 70 70 80 80
Follow current interrupting rating Ifi [kA] 100 15 - -
Voltage protection level Up at In (L-N..) [kV] ≤ 1.5/-/1.5 ≤ 2.5/-/1.5 -/-/1.4 -/-/2
Voltage protection level Ures at 3 kA [kV] - 0.5 0.8
TOV (Temporary overvoltage) withstand Ut [V] 337/– 581 / – 337/– 581/–
(L-N..)
Response time [ns] ≤ 100 ≤ 100 ≤ 25 ≤ 25
Short-circuit withstand capability Isccr [kA] 100 15 100 100
Backup protection fuse (gG) [A] ≤ 315 ≤ 315 ≤ 160 ≤ 160
maximum rating circuit breaker (B or C) [A] – – ≤ 125 ≤ 125
Pluggable cartridge Yes Yes Yes Yes
Integrated thermal disconnector Yes Yes Yes Yes
State indicator Yes Yes Yes Yes
Safety reserve No No Yes Yes
Auxiliary contact Yes (TS option) Yes (TS option) Yes (TS option) Yes (TS option)
Installation
Wire range solid wire [mm²] 25 … 50 25 … 50 2.5 … 35 2.5 … 35
(L, N, PE) stranded wire [mm²] 25 … 35 25 … 35 2.5 … 25 2.5 … 25
Stripping length (L, N, PE) [mm] 15 15 12.5 12.5
Tightening torque (L, N, PE) [Nm] 2.5 2.5 2.8 2.8
Auxiliary contact (TS)
Contacts information 1 NO - 1 NC 1 NO - 1 NC 1 NO - 1 NC 1 NO - 1 NC
Min. load 12 DC - 10 mA 12 DC - 10 mA 12 DC - 10 mA 12 DC - 10 mA
Max. load 250 V AC - 1A 250 V AC - 1A 250 V AC - 1A 250 V AC - 1A
Connection cross-section [mm²] 0.5 ... 1.5 0.5 ... 1.5 1.5 1.5
Miscellaneous characteristics
Stocking and operating temperature [°C] -40 to +80 -40 to +80 -40 to +80 -40 to +80
Maximal Altitude [m] 2000 2000 5000 5000
Degree of protection IP20 IP20 IP20 - Indoor IP20 - Indoor
Fire resistance according to UL 94 V-0 V-0 V-0 V-0
Dimensions
height x width x depth [mm] 108.1 × 108 × 86.3 108.1 × 108 × 86.3 88 x 53.4 x 76.7 88 x 106.8 x 76.7
[inches] 4.25 x 1.41 x 3.38 4.25 x 1.41 x 3.38 3.46 x 2.1 x 3.02 3.46 x 4.2 x 3.02
Dimensions with auxiliary contact (TS)
height x width x depth [mm] 109.2 × 108 × 86.3 109.2 × 108 × 86.3 95.8 x 53.4 x 76.7 95.8 x 106.8 x 76.7
[inches] 4.29 x 1.41 x 3.38 4.29 x 1.41 x 3.38 3.77 x 2.1 x 3.02 3.77 x 4.2 x 3.02
Replacement Cartridges
Phase Product ID OVR T1-T2 25-255 C QS OVR T1-T2 25-255 C QS OVR T1-T2 12.5-275s C QS OVR T1-T2 12.5-440s C QS
2CTB825101R8000 2CTB825101R8000 2CTB815710R2600 2CTB815710R5500