Summary
FZW28-12(VSP5) type outdoor HV AC SF6 insulation vacuum load break switch is used to open and close load current and short-circuit
current in the power distribution system with rated voltage 12kV, three-phase AC 50/60Hz. It is applicable to substations, industrial and
mining enterprises, urban and rural electric power networks, especially to the occasions with frequent operation and urban and rural
automatic power distribution networks for power network control and equipment protection. The switch has the functions of manual
operation and electric operation. The product conforms to the standards of IEC 60265-1, IEC62271-103 & GB/T3804: High voltage AC
load break switch.
Ambient conditions
1. Altitude: ≤3000m;
2. Ambient temperature: -30℃~+45℃;diurnal temperature rang ≤25℃;
3. Wind speed: ≤35m/s;
4. Earthquake intensity: ≤grade 8;
5. Relative humidity: monthly average ≤90%; daily average ≤95%;
6. Ice thickness: ≤10mm
7. Pollution degree: ≤Ⅳ(GB5582);
8. Applicable occasions: no fire and explosion danger, no chemical corrosion and no frequent severe vibration.
Model
Technical specification
No. |
Item |
Data |
Operating method |
Manual or electric(persistent excitating magnet) |
1 |
Rated value |
Rated voltage |
12KV |
Rated current |
630A |
Rated short-time withstand current(4s) |
12.5 16 20 |
Rated short-circuit closing current(peak) |
31.5 40 50 |
Rated frequency |
50/60Hz |
2 |
1min P.F withstand current |
Operating voltage |
AC220V(80%~110%) |
Phase to earth |
42KV |
Phase to phase |
42KV |
Across open contacts |
48KV |
Secondary phase to earth |
2KV |
3 |
Lightning impulse
withstand current(peak) |
Phase to earth |
75KV |
Phase to phase |
75KV |
Across open contacts |
85KV |
4 |
Rated gauge pressure of SF6 gas
|
Concentration up to 93% at 0 gauge pressure |
5 |
Manual rated operating strength |
100~400N |
6 |
Main loop resistance |
≤700μΩ/≤150μΩ |
7 |
Close-operating |
184~220V |
closing time
120-180ms(220V)
≤400ms(184V)
attract current ≤17A
bouncing time≤10ms
maintaining current≤ |
Lowest closing voltage |
120~160V |
8 |
Open-operating |
184~220V |
opening time≤1.5s
asynchronous time≤3ms |
Lowest maintaining attact voltage |
45~85V |
9 |
Close/open-operating time difference between isolation clearance and vacuum arc-extinguishing chamber |
≥10ms |
10 |
Power consumption |
≤99W |
11 |
Short-circuit non-breaking test |
≥1400A |
12 |
Air-sealed test(leakage detecting) |
No leakage at 0.2Mpa |
13 |
Contact gap of vacuum arc-extingushing chamber |
7~9mm |
14 |
Contact over-travel of vacuum arc-extingushing chamber |
3~4mm |
15 |
Across isolating distance |
25~35mm |
16 |
Isolating clearance over-travel |
6~13mm |
17 |
Net weight |
185Kg |
|
Main function features
1. SF6 gas insulation: SF6 gas is the non-toxic, non-combustible and electrical insulation gas, it has excellent arc-extinguishing performance;
2. Besides the standard porcelain bushing, a variety of options are available including silicon rubber insulator on the epoxy equipment bushing;
3. Visible Open/Close: The main contact position indicator marked by colors (Green-Open; Red-Close) can be easily visible from the ground.
The indicator is connected directly to the main contact drive shaft assembly to ensure displaying the contact state accurately;
4. Reliable sealing performance with IP67 Protection Level: The mature sealing technoloty assures reliable sealing performance. The shell
is processed by die drawing once-shaping technology, so it’s easy for the case sealing with high air tightness and high mechanical strength.
5. Free maintainance: The main loop of circuit breaker, the secondary component and the operation mechanisn are all sealed in SF6 gas(zero
gauge pressure), so they are not affected by the external environment, and have stable & reliable performance as well as the advantage
of free maintianance.
6. Good performance of incoming and outgoing line: The switch can adopt cable incoming & outgoing method, or can use liquid silicon
rubber corner bushing to make the distance between phases up to 280mm and ensure good performance of external insulation.
7. Safe usage: Anti-explosive device mounted on the top of box can prevent heated gas or matters from spattering out once the switch fault
occurs.
Outline and installation dimension