Siemens SDR 15.5 kV, Instruction Manual

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Technical data
Table 6: Minimum trip
currents
Characteristic Unit Voltage class
Rated maximum voltage U
r
kV 15.5 27.0 27.0 38.0
Rated continuous current I
r
A 630, 800 630, 800 630, 800 630, 800
Rated lightning impulse withstand voltage U
p
kV 110 125 150 170
Power frequency insulation level withstand test
voltage (one minute dry) U
d
kV 50 60 70 70
Rated symmetrical interrupting current I
sc
kA 12.5, 16 12.5 12.5, 16 12.5, 16
Rated asymmetrical making current (rms) kA 20, 25 20 20, 25 20, 25
Rated peak making current kA 32.5, 41 32.5 32.5, 41 32.5, 41
Mechanical life (operating cycles) OPS 10,000 10,000 10,000 10,000
Permissible short-circuit operations OPS up to 250 up to 250 up to 250 up to 250
Ambient temperature range ºC -40 to +55 -40 to +55 -40 to +55 -40 to +55
Centerline spacing between phases
in
(mm)
14.8 (376) 14.8 (376) 14.8 (376) 14.8 (376)
Flashover distance Unit
Phase/phase
in
(mm)
12.3 (312) 12.3 (312) 12.3 (312) 12.3 (312)
Phase/ground (earth)
in
(mm)
10.4 (265) 10.4 (265) 13.4 (340) 13.4 (340)
Creepage distance Unit
Phase/ground (earth)
in
(mm)
31.9 (810) 31.9 (810) 50.8 (1,290) 50.8 (1,290)
Between line-side and load-side terminal
in
(mm)
46.1 (1,170) 46.1 (1,170) 54.8 (1,390) 54.8 (1,390)
Table 5: Main
characteristic data
Protective function Unit Minimum trip current
Phase faults A 40 40 40 40
Ground (earth) faults A 4 4 4 4
Sensitive ground (earth) faults A 4 4 4 4
Table 7: Operating
times Operation time Unit Time
Closing time ms <60 <60 <60 <60
Opening time ms <35 < 35 < 35 < 35
Arcing time ms <15 <15 <15 <15
Interrupting time ms <50 <50 <50 <50
Table 8: Dead times for
recloser cycle
(reclosing interval)
Dead time Unit Time range
Dead time after first open s 0.2 to 14,400 0.2 to 14,400 0.2 to 14,400 0.2 to 14,400
Dead time after second and third open s 2 to 14,400 2 to 14,400 3 to 14,400 3 to 14,400
Dead time after fourth open s 30 to 14,400 30 to 14,400 30 to 14,400 30 to 14,400