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Primary distribution cells also called "substation cells"
Technical characteristics:
| Rated voltage (Ur) |
7.2kV; 12kV; 24kV
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Rated current (Ir):
|
max. 4000 A |
| Breaking current: |
max. 50 kA
|
Short duration admissible rated current (Ik):
|
Max. 50 kA/1s |
| Peak admissible rated current (Ip): |
Max. 125 kA |
| Rated frequency: |
50/60 Hz
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Resistance to electric arc action :
|
Max. 55 kA |
Protection degree:
|
IP 3X |
General electric characteristics:
| Features |
M.U |
Value |
obs |
| Rated voltage |
kV |
7,2 |
12 |
24 |
|
| Rated lightning-resistance voltage (phase-ground, phase-phase) |
kV |
60 |
75 |
125 |
| Rated 50Hz test resistance voltage |
kV |
20 |
28 |
50 |
Rated current (In):
• bus-bars
• switch
• current transformer |
A |
max.4000
max.4000
max.4000 |
max. 4000
max. 4000
max. 4000 |
max. 2500
max. 2500
max. 2500 |
| Breaking current |
kA |
max.50 |
max. 50 |
max. 25 |
| Peak admissible rated current |
kAmax |
max.125 |
max. 125 |
max. 63 |
| Short duration admissible rated current |
kAef |
max.50/1s |
max.50/1s |
max. 25/1s |
| Rated frequency |
Hz |
50 (60*) |
| Secondary and control circuits voltage |
V |
d.c. |
24; 48; 60; 110;220. |
** |
| a.c. |
100; 110; 230. |
| Usual protection functions |
ANSI code (***) |
27; 37; 46; 50; 51; 59; 67N; 81. |
** |
Normal protection degree
• in the work position, with all the doors and panels closed
• between neighboring inner compartments |
IP 3X, upon request IP 4X
IP 2X |
|
| Bar insulation in the main circuits |
air |
| Free electric arc resistance inside the cells |
KA |
55 KA |
12KV |
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| 25KA |
|
24KV |
* upon special request
** according to the beneficiary’s order; other values are also available upon request;
*** the protections according to the ANSI codes are as follows:
27. protection at minimum voltage;
37. undercurrent protection;
46. phase currents imbalance protection;
50. overcurrent (short-circuit) instantaneous protection;
51. overcurrent (overload) delayed protection;
59. maximum voltage protection;
67N. earthing directional protection;
81. network frequency variation protection.
Product variants:
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Medium voltage electric cells, in metallic case, for indoor use, with simple bar system, of 12kV / max. 1250A / max. 31.5kA provided with Siemens equipment >
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Medium voltage electric cells, in metallic case, for indoor use, with simple bar system of 12kV / max. 1250A / max. 31.5kA, provided with Schneider equipment >
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Medium voltage electric cells, in metallic case, for indoor use, with simple bar system of 12kV / max. 2500A / max. 31.5kA, provided with ABB equipment with vacuum commutation >
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Medium voltage electric cells, in metallic case, for indoor use, with simple bar system of 12kV / max. 2500A / max. 31.5kA, provided with ABB equipment with SF6 commutation >
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Medium voltage electric cells, in metallic case, for indoor use, with simple bar system of 24kV / max. 1250A / max. 25kA, 800 mm width, provided with ABB equipment >
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Medium voltage electric cells, in metallic case, for indoor use, with simple bar system of 24kV / max. 1250A / max. 25kA, 800 mm width, provided with Siemens equipment >
-
Medium voltage electric cells, in metallic case, for indoor use, with simple bar system of 24kV / max. 1250A / max. 31.5kA, provided with ABB equipment >
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Medium voltage electric cells, in metallic case, for indoor use, with simple bar system of 24kV / max. 1250A / max. 25kA, with 1000mm width provided with Siemens (3AH) equipment >
Other information:
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