External drawer-type fuse replacement and <40ms fault clearing ensure safe, maintenance-free compact secondary distribution.
Drawer-type combination fuse with double-break isolation enables fuse changeover without opening the HV compartment, eliminating arc-flash risk and reducing maintenance time by >80% versus internal-access designs.
Integrated vacuum interrupter and fuse coordination clears overload/short-circuit currents within 40ms, limiting let-through energy and protecting downstream transformers from thermal damage during frequent switching operations.
±0.1mm assembly tolerance ensures seamless mechanical interchangeability with existing vacuum/SF6 RMUs in retrofit projects; ≥99% part standardization guarantees consistent performance across multi-unit installations.
316L stainless steel base with nano-ceramic coating passes 3,000h salt spray and 200 thermal cycle tests; German water-based electrostatic paint achieves ≤5μm uniformity for zero-maintenance appearance in coastal or industrial zones.
Strict "five-prevention" soft interlock between vacuum interrupter, disconnector, and grounding switch prevents misoperation; all switching functions executable with door closed per IEC 62271-200 safety requirements.
Laser scanning confirms ±0.1mm assembly tolerance on every cabinet; mechanical interface test documented per IEC 62271-200 to validate drop-in compatibility with legacy RMU footprints.
Salt spray and thermal cycling test reports referenced to actual batch samples; coating thickness and adhesion measured per ISO 12944 to confirm C5-M environment suitability.
Fuse-interrupter coordination tested to verify <40ms clearing time at rated transfer current (2500A); mechanical life ≥10,000 cycles validated in CNAS-accredited lab per IEC 62271-1.
Interface verification for ABB, Siemens, Schneider, and domestic ZN85/HVX components; interlock timing and clearance measurements documented to ensure safe operation regardless of selected apparatus.
|
Item |
Unit |
Load Switch Cabinet |
Combined Electrical Cabinet |
||
|
Rated voltage |
|
|
KV |
12 |
|
|
Reted power |
|
|
Hz |
50/60 |
|
|
Rated insulation level |
1 min power frequency withstand voltage |
Alternately and relatively |
KV |
42 |
|
|
Isolation fracture |
48 |
||||
|
Lightning impulse withstand voltage |
Alternately and relatively |
75 |
|||
|
Isolation fracture |
85 |
||||
|
Rated current of main bus |
A |
630 |
125 |
||
|
Rated shore-time withstand current |
KA/4S |
20 |
20 |
||
|
Rated peak withstand current |
KA |
50 |
50 |
||
|
Rated AC current |
A |
|
3150 |
||
|
Rated short-circuit making current (peak value) |
KA |
50 |
50 |
||
|
Rated short-circuit breaking current (effective value) |
KA |
|
31.5 |
||
|
Rated active load breaking current |
A |
630 |
|
||
|
Ground loop dynamic stability current (peak value) |
KA |
50 |
|||
|
Ground loop thermal stability current |
KA/2 |
20 |
|||
|
Mechanical life |
Vacuum load switch |
Time |
10000 |
||
|
Earthing switch |
Time |
2000 |
|||
|
Auxiliary circuit 1min power frequency withstand voltage |
KV |
2 |
|||
|
Working voltage of electric operating mechanism |
V |
AC220/110；DC220/110 |
|||
|
Enclosure rating |
|
IP3X |
|||
FZN-12 vacuum load switch for standard ring-main duty, or ZN-12/630-20 circuit breaker for feeder protection; both pre-validated for drawer fuse coordination and interlock integrity.
Standard 630A busbar, 2500A transfer current, 160A fuse; custom ratings available based on verified coordination test data for unique load profiles.
Nano-ceramic + German paint for C5-M/CX zones; anti-condensation heaters and IP23D ventilation for humid/tropical sites; low-temperature lubricants for -40°C operation.
Embedded sensors for contact temperature, fuse status, and mechanical position; Modbus/IEC 61850 communication; optional motorized operating mechanisms for remote switching.
RAL color matching, bilingual labels, QR-coded digital manuals; custom compartment layouts for special metering, automation, or auxiliary power requirements.
Dedicated fuse handling tools included; spare parts kits tailored to switch/fuse brand; extended warranty packages backed by 80+ country service network.
Optional electrical interlocks for remote operation verification; arc-flash detection systems with <10ms trip response; enhanced mechanical locks for high-security facilities.
Tell us your project requirements—voltage level, environment, grid code, or delivery timeline—and we’ll provide a compliant, optimized solution.
EN