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Solid Insulated Metal-Enclosed Sf6 Electrical Switchgear (SRM16-12)
Ⅰ.Overview
By the perfect integration of stationary type and flexible expansion, SRM16-12 type SF6 gas-insulating compact close metal switchgear with the adoption of the modular design,can be fixed of extended,it is suitable for end-user or network node, meanwhile meets the requirement of all kinds of switching substations cabinet-type transformer substations and cable
Branch cabinets. It characters on its compact structure, safety and reliability, longevity and maintenance free.
Ⅱ.Environmental conditions
1.Elevtitude of ≤ 3000 m
2.High ambient temperature + 55℃, lower temperature-45℃
3.High humidity and high average relative humidity
4.Measure 95% of ≤ for 24 hours, and 90% for 1 month
5.Seismic seismic intensity shall not exceed 8 degrees
6. No fire, explosion hazard, serious filthy, chemical corrosion, as well as places of intense vibration
Ⅲ.Specification
Item | Unit | C module | F module | V module | CB module | |||
load break switch | switch fuse | vacuum switch | isolate/earhing switch | vacuum circuit breader | isolate/earhing switch | |||
rated voltage | kV | 12/24 | 12/24 | 12/24 | 12/24 | 12/24 | 12/24 | |
power frequency withstand voltage | kV | 42/50 | 42/50 | 42/50 | 42/50 | 42/50 | 42/50 | |
impulse withstand voltage | kV | 95/125 | 95/125 | 95/125 | 95/125 | 95/125 | 95/125 | |
rated current | A | 630/630 | note 1 | 630/630 | 1250/630 | |||
rated transfer current | A | 1750 | ||||||
closed loop | A | 630 | ||||||
off load cable charging | A | 630 | ||||||
5% rated active load drop-out current | A | 135/135 | ||||||
earth fault breaking current | A | 31.5/- | ||||||
when earth fault, drop-out current of cable charging | A | 200/150 115/87 | ||||||
short circuit drop-out current | kA | note 2 | 20/16 | 25/20 | ||||
making capacity | kA | 63/50 | note 2 | 50/40 | 50/40 | 63/50 | 63/50 | |
short time current 2s | kA | 25/- | ||||||
short time current 3s | kA | -/20 | 20/16 | 20/16 | 31.5/25 | 31.5/25 | ||
mechanical life | times | 5000 | 3000 | 5000 | 2000 | 10000 | 5000 | |
Note:1.varies with rated current value of fuse . 2.limited by high voltage fuse | ||||||||
Ⅳ.Features
1.SF6 gas performance indicators:absolute pressure at 20oC is 1.4 PAR.
2.Annual gas leakage rate is 2‰.
3.chamber stainless steel thickness 3.0mm
4. Cabinet material: aluminum-zinc-plate 2mm
5. Including side expansion and top expansion
6. 630A/20kV specification internal arcing duration 1S
7. Shell protection grade: Shell IP41, IK07, air box shell (304/3mm stainless steel) protection grade IP67
8. At the rated voltage Ur, the X-ray emission level at 1m away from the vacuum interrupter does not exceed 5μSv/h; at the power frequency withstand voltage Ud, the X-ray emission level at 1m away from the vacuum interrupter does not exceed 150μSv/h
9. The solubility of the salt solution is (5±1)% (mass ratio), the PH value is 6.5-7.2 at (35±2)oC, and the spray duration is 168h
Mechanical life test: circuit breaker 10000 times (M2 level), three-station isolation/earth switch 3000 times (M1 level)
Available modules:
C Load break switch module ( Width = 325mm )
De Cable connection module with earthing switch ( Width = 325mm )
D Cable connect module without earthing switch ( Width = 325mm )
F Load break switch and fuse combination module ( Width = 325mm )
V Vacuum switch module ( Width = 325mm )
SL Bus bar section module ( load break switch) (Width = 325mm )
Sv Bus bar section breaker module (vacuum switch) (Width = 650mm )
Be Bus bar earth module (Width = 325mm )
M Metering module (Width =750\1000mm )CB Vacuum circuit breaker module (Width = 500mm )
PT power module (Width = 400mm)
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