TAVRIDA ELECTRIC VCB Series, User Manual

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1.2 Main technical parameters
Main technical data and circuit breaker technical parameters are presented in the tables below.
Table 1 - Main technical parameters
Type VCB15_LD1 VCB15_LD3 VCB15_LD6 VCB15_LD8 VCB15_MD1 VCB15_MD3 VCB15_Shell2 VCB15_HD1 VCB25_LD1 VCB25_LD2 VCB25_LD3
Rated voltage (Ur) 12 kV 17.5 kV 12 kV 12 kV 17.5 kV 17.5 kV 17.5 kV 17.5 kV 17.5 kV 24 kV 24 kV 24 kV
Rated normal current (Ir) 800 A 800 A 630 A 800 A 1250 A 1250 A
1250 A
1)
2000 A
2000 A
2)
3150 A
3)
800 A 800 A 800 A
Rated power frequency withstand voltage (Ud)
28 (42)
4)
kV
38 (42)
4)
kV
28 (42)
4)
kV 28 (42)
4)
kV 38 (42) kV
4)
38 (42) kV
4)
38 (42) kV
4)
38 (42) kV
4)
38 (42) kV
4)
50 kV 50 kV 50 kV
Rated lightning impulse withstand voltage (peak) (Up) 75 kV 95 kV 75 kV 75 kV 95 kV 95 kV
5)
95 kV
5)
95 kV
6)
95 kV 125 kV 125 kV 125 kV
Rated short-circuit breaking current (Isc) 20 kA
7)
20 kA
7)
20 kA
7)
20 kA
7
31.5 kA
7)
31.5 kA
7)
31.5 kA
7)
31.5 kA
7)
16 kA
7)
16 kA
7
16 kA
7)
Rated peak withstand current (Ip) 52kA 52kA 52kA 52kA 82 kA 82 kA 82 kA 82 kA 42 kA 42 kA 42 kA
Rated short-time withstand current (Ik) 20 kA 20 kA 20 kA 20 kA 31.5 kA 31.5 kA 31.5 kA 31.5 kA 16 kA 16 kA 16 kA
Rated duration of short circuit (tk) 4 s 4 s 4 s 4 s 4 s 4 s 4 s 4 s 4 s 4 s 4 s
Rated frequency (fr) 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz
Mechanical life (CO-cycles) 50 000 50 000 20 000 50 000 30 000 50 000 30 000
8)
30 000
8)
30 000
8)
30 000 30 000
8)
Maximum number of CO-cycles per hour 60 60 60 60 60 60 60 60 60 60 60
Operating cycles, rated
–short circuit breaking current
100 100 100 100 50 50 50 50 50 50 50
Closing time
≤ 70
9)
ms
≤ 70
9)
ms
≤ 70
9)
ms
≤ 70
9)
ms
≤ 60
9)
ms
≤ 60
9)
ms
≤ 60
9)
ms
≤ 60
9)
ms
≤ 60
9)
ms
≤ 60
9)
ms
≤ 60
9)
ms
Opening time
≤ 35
9)
ms
≤ 35
9)
ms
≤ 35
9)
ms
≤ 35
9)
ms
≤ 35
9)
ms
≤ 35
9)
ms
≤ 35
9)
ms
≤ 35
9)
ms
≤ 35
9)
ms
≤ 35
9)
ms
≤ 35
9)
ms
Break time
≤ 45 9)
ms
≤ 45 9)
ms
≤ 45 9)
ms
≤ 45 9)
ms
≤ 45 9)
ms
≤ 45 9)
ms
≤ 45 9)
ms
≤ 45 9)
ms
≤ 45 9)
ms
≤ 45 9)
ms
≤ 45 9)
ms
Rated operating sequence at rated normal current O-0.3s-CO-10s-CO-10s-CO
10)
Rated operating sequence at rated short-circuit
breaking current
O-0.3s-CO-15s-CO
Auxiliary circuits insulation strength
11)
Power frequency test voltage (1 min) according to
IEC60255-27
2 kV 2 kV 2 kV 2 kV 2 kV 2 kV 2 kV 2 kV 2 kV 2 kV 2 kV
Lightning impulse 1.2 m s/50 m s/0.5 J according to
IEC60255-27
5 kV 5 kV 5 kV 5 kV 5 kV 5 kV 5 kV 5 kV 5 kV 5 kV 5 kV
Insulation resistance, 1000V DC according to
IEC60255-27
≥ 5 MOhm ≥ 5 MOhm ≥ 5 MOhm ≥ 5 MOhm ≥ 5 MOhm ≥ 5 MOhm ≥ 5 MOhm ≥ 5 MOhm ≥ 5 MOhm ≥ 5 MOhm ≥ 5 MOhm
Design class of switching module with regard to
severity of service conditions in accordance with IEC
60932
Class 1 Class 1 Class 1 Class 1 Class 0 Class 0 Class 0 Class 0 Class 0 Class 1 Class 0