1.Ambient air temperature:
Maximum air temperature:+40℃
Minimum air temperature:-15℃℃,
2.Altitude:≤1000m;
3.Humidity:
Daily average value of relative humidity:<95%
Monthly average value of relative humidity:<90%
4.Earthquake grade less than Degree 8
5.The ambient air is not significantly polluted by dust, smoke, corrosive and/or flammable gases,vapours or salt.
Structure of switchgear as Figure 1
The switchgear is of case fixed structure, switchgear body made of thin steel sheet and angular steel being welded. Top back of switchgear is busbar compartment, the pressure relief device set on top, top front is relay compartment, small busbar can be connected from bottom through cables,middle and downside part of switchgear are inter working, busbar compartment to be electrically connected with the high voltage apparatus in middle and downside switchgear through GN30rotation type isolator, vacuum circuit breaker installed in the middle, earth switch or outgoing isolator installed downside, CT, PT, arrester installed in back, primary cable outgo from back of switchgear, on the bottom earthing busbar is fixed, passing through all switchgears in row, isolator and earth switch is operated from the left of front panel.
The switchgear adopt the mechanical interlock device, simple and easy to operate, to realize five-prevents(interlocking as to Figure 2)
Note: According to different design arrangement, some switchgear will have no downside isolator, or replaced by earth switch, their interlock function and five-prevents can be met as well.
| Description | Unit | Specifications | ||
|---|---|---|---|---|
| Rated voltage | KV | 3.6 | 7.2 | 12 |
| Rated current | A | 630 | 1250 | |
| Rated short-circuit breaking current | kA | 20 | 25 | 31.5 |
| Rated short-circuit making current | kA | 50 63 80 | 63 | 80 |
| Rated short-time withstand current (4s rms) | kA | 20 25 31.5 | 25 | 31.5 |
| Rated peak withstand current(peak) | kA | 50 63 80 | 63 | 80 |
| Rated power frequency withstand voltage(1min) | kv | 42 | ||
| Rated lighting impulse withstand voltage | kV | 75 | ||
| 1min power frequency withstand voltage of auxiliary circuit | kV | 2 | ||
| Degree of protection | IP3X | |||
| Dimensions(WxDxH) | mm | 950x950x2300(General) | ||
This switchgear is suitable for indoor complete device divided by the 3.6-12 kV three-phase AC 50 Hz single bus, and for the distribution and control of electric energy to control,protect and monitor the circuit. It can be applied in all kinds of power generating factories, substation and minerals industry, the high building, etc. For distribution and control of electric energy, also can be applied as the power supply for the RMU and terminals.
The user shall perform maintenance, inspection, repair periodically, including.
Clean off dusts on each parts, especially the surface of insulating parts.
Check the moving position of mechanical parts, add lubrication grease on period.
Check electric contacting position is well contacted, if overheating happen or not, earthing circuit is connected or not
Check the fixings are loose periodically or not.
The user shall perform fault solution by aid of technician, if it need small adjustment or solve small fault, the user should execute according to this manual and the instruction of each components.
The switchgear is designed to operate in ambient temperatures ranging from -10 to +40 degrees Celsius, at altitudes up to 1000m, and with a daily average relative humidity of 95% and a monthly average of 90%. It should be used in areas free from flammable, explosive materials, and severe vibration, and with an earthquake intensity up to 8 degrees.
The XGN66A-12 is used in systems with a rated voltage of 3.6 to 12KV, three-phase, AC 50/60Hz, for receiving and distributing electrical energy. It is suitable for sites with frequent operations and for upgrading switchgear with oil-type breakers. It can be arranged for single bus systems and single bus sectionalizing systems.
