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Insulation system:
External insulation and internal insulation Vacuum insulation is adopted for internal insulation. As for external insulation, pollution-resistant outdoor epoxy resin, silicon rubber or ceramic shell with anti-aging performance and good resistance to corrosion is used for external insulation. All live parts in the outdoor box type vacuum circuit breaker are sealed in the SF6 gas chamber. Vacuum extinction is adopted and zero gauge pressure SF6 gas is used for supplementary insulation. The equipment can offer maintenance-free operation for 15 years and is explosion-proof.
|
S/N |
Item |
Unit |
Parameter |
|
|
1 |
Switch cabinet |
|||
|
2 |
Item |
|
Circuit-breaker |
load switch |
|
3 |
Rated voltage |
kV |
12 |
|
|
4 |
Power frequency withstand voltage |
kV |
42/48 |
|
|
5 |
Lightning impulse withstand voltage |
kV |
75/85 |
|
|
6 |
Rated current |
A |
630 |
|
|
7 |
Rated short-time withstand current |
kA/4s |
20 |
20 |
|
8 |
Rated short-circuit open current |
kA |
20 |
----- |
|
9 |
Closing voltage |
V |
AC220 |
DC24 |
|
10 |
Opening voltage |
V |
DC48 |
DC24 |
|
11 |
Mechanical life |
Times |
10000 |
|
|
12 |
SF6 gas gauge pressure (at 20℃) |
Mpa |
0.04 |
|
|
13 |
Partition controller |
|||
|
14 |
Model |
|
FDR |
|
|
15 |
Working power supply voltage/frequency |
|
AC220V/50Hz |
|
|
16 |
Setting value of phase-to-phase short circuit protection current |
A |
1-5 5-section switch (software adjustable under specific conditions) |
|
|
17 |
Setting value of zero-sequence current for ground protection |
|
20mA-60A 12-section switch (software adjustable under specific conditions) |
|
|
18 |
Setting value of ground protection action time |
s |
0-60 12-section switch (software adjustable under specific conditions) |
|
|
19 |
Permissible error for operation value |
|
±5% |
|
1. Intelligent detection of faults: detect a fault occurred inside or outside the boundary for subsequent action.
2. The device supports dual AC power supply mode and uses battery
(super-capacitor) as backup power source for power supply. Normally, the device
is powered by AC power supply and PT power supply is also supported. When AC
power source is cut off, the device should switch to another AC power source or
backup power source for power supply without disturbance. When AC power source
restores power supply, the device should automatically switch to AC power
source for power supply.
3. Intelligent power source management function: battery activation management
function is provided to realize battery charge and discharge in an automatic,
manual at site and remote control manner and the interval of battery charge and
discharge can be set.
4. Prepaid electric energy meter function: intelligent management of power
metering and prepaid power service is realized after a prepaid electric energy
meter is installed.
5. Support power data collection and monitoring system, energy management
system, substation automation system, converter station computer monitoring
system, power plant computer monitoring system, distribution automation system,
microcomputer relay protection and automatic safety device, wide-areas phase
measurement system(wams), load control system, water power scheduling
automation system and hydropower cascade dispatching automation system,
electric energy metering and billing system, supplementary controlled system for
real-time power market, etc.