Is Sectos offers reliable maintenance free operation even in the most demanding climatic conditions, including salt laden atmospheres, corrosive industrial pollution, snow and ice. It has excellent load breaking and fault making capacity and satisfies
the isolation requirements specified for load break switch.
Design:
The three-phase switch unit is mounted inside a sealed 3mm stainless steel tank filled with SF6 gas.
The stainless steel tank is designed for its maximum robustness and minimum welding line to minimize corrosion, and specifically to guarantee the safety of the operation personal even with the internal arc faults at the maximum fault capacity.
Advanced and integrated Helium leakage detecting and filling equipment are be adopted, which ensuring SF6 leakage of each switch is less than 0.1% per year.
The independent spring operating mechanism adopt as patent spiral spring, provides a guaranteed load break and fault making capability by ensuring the opening and closing speed of the switch.
Key features of the product
- fully enclosed switch
- no external moving parts
- robust design, field tested around the world
- replaceable external silicon bushing
- various creepage version available
- speed of contact independent from operator
- direct connection of cable heads to the switch
- manual or motor operation
- optional earthing switch up to 24 kV
- unique 3-way, double switch in one enclosure
- various installation mode
- safety interlocking
- current and voltage measurement
- available sensor solution
- installation of protective surge arresters directly
on the switch
- low power consumption of motor
- automatic sectionalizer function
- type tested according IEC
Customer benefits and savings
- maintenance free
- reliability in most demanding conditions
- easy upgradable from manual to motor
- easy and fast installation
- dedicated supporting structures for various poles
- installation of the current and voltage measurement system and surge arresters directly on switch -space saving and installation time reduction
- possibility to install under voltage - reduction of undelivered energy and SAIDI, SAIFI indicators
- complete package together with automation from one global supplier
Safety
- no external arc
- mechanical and electrical interlocking
- high making capability up to 50 kA
- clearly visible and reliable position indicator
- open break fulfilling disconnector requirements
- internal arc proof
- low gas indication and locking
- safety valve for gas pressure release
- optional earthing switch
Automation
Is able to deliver complete solution of automatic sectionalizer, tailor made according to specific needs.
Functionality which could be implemented:
- three phase non-direction or directional fault detection
- non-direction or directional earth fault detection
- fault location
- automatic sectionalizing schemes
- power quality measurement
- remote control - communication protocols IEC61850, IEC 60870-5-101/104, DNP3, Modbus.
| Technical data |
| Type |
|
NXA |
| Rated Voltage |
kV |
36 |
| Power frequency withstand voltage,50Hz |
| -to earth and between phases |
kV |
70 |
| -across the isolating distance |
kV |
80 |
| Lightning impulse withstandvoltage |
| -to earth and between phases |
kV |
170 |
| - across the isolating distance |
kV |
195 |
| Currentratings |
| Rated normal current |
A |
630 |
| Mainly active load breaking current |
A |
400/630 |
| Number of breaking operations co |
n |
400/100 |
| Line-charging breaking current |
A |
40 |
| Cable-charging breaking current |
A |
40 |
| Earth fault breaking current |
A |
185 |
| Cable charging breaking current under earth fault conditions |
A |
80 |
| No-load transformer breaking current |
A |
20 |
| Short-circuit ratings |
| Short-time withstand current,lk/time |
kA |
12,5/35 |
| Peak withstand current |
kA |
315 |
| Short-circuit making current |
kA |
315 |
| Number of making operations |
|
|
| -main switch (CL E3) |
n |
5 |
| -earthing switch 50kA(CLE2) |
n |
|
| -earthing switch 31,5kA(CL E3) |
n |
|
| Creepage distance |
mm |
1440 |
| Mechanical endurance Co |
n |
5000 |
| Ambient air temperature limits |
oC |
-40;+60 |
| Standards |
IEC62271-1;IEC62271-102;IEC 62271-103 |
Audited Supplier 
){kind=link}