Nxb Sectos Pole Mounted Sf6 Load Break Switch

• Customization: Available
• Breaking Capacity: High Voltage Circuit Breakers
• Operation: Electric Type
• Model NO.: NXB
• Speed: Normal Type Circuit Breaker
• Arc-extinguishing Medium: SF6
• Installation: Open Frame
• Structure: ACB
• Poles Number: 1
• Type: Fuse
• Function: Conventional Circuit Breaker
• Certification: VDE
• Rated Voltage: 12kv
• Power Frequency Withstand Voltage: 50Hz
• to Earth and Between Phases: 28kv
• Across The Isolating Distance: 32kv
• Transport Package: Wooden Box
• Specification: 1
• Trademark: 1
• Origin: Zhejiang

Product Description

    Product family name "Sectos" is used, when the clause is applicable to all NXA_, NXB_, NXBD_types. The more specific type markings are given, when the clause is applicable to limited types only.

    Sectos is an SF6-insulated, outdoor pole mounted load break switch family for overhead lines and specifically designed for use in modern remote controlled distribution automation systems. The Sectos offers reliable main tenance free operation even in the most de manding climatic conditions including salt laden atmospheres, corrosive industrial pollution, snow and ice. It has excellent load breaking and fault making capacity and sati-sfies the isolation requirements specified for load break switch. The earthed metal tank prevents all possible leakage currents across an open switch. Sectos can be manually operated or motor operated for local and remote electric control, and can be upgraded easily. NXB is designed up to 24kV rated voltages. The unique feature of this type is integrated earthing switch option.

    NXBD is a 3-way load break switch using NXB components. Two independent load break switch in one enclosure with the third tapped way can be used for easy and reliable line branching in overhead, cable, or mixed networks. NXA is available for rated voltages 36kV to IEC standards.

Technical data
Type		NXB&NXBD
Rated Voltage	kV	12	24
Power frequency withstand voltage,50Hz
-to earth and between phases	kV	28	50
-across the isolating distance	kV	32	60
Lightning impulse withstandvoltage
-to earth and between phases	kV	75	125
- across the isolating distance	kV	85	145
Currentratings
Rated normal current	A	630	630
Mainly active load breaking current	A	630	630
Number of breaking operations co	n	400	400
Line-charging breaking current	A	50	50
Cable-charging breaking current	A	50	50
Earth fault breaking current	A	50	50
Cable charging breaking current under earth fault conditions	A	29	29
No-load transformer breaking current	A	63	63
Short-circuit ratings
Short-time withstand current,lk/time	kA	20/35	20/35
Peak withstand current	kA	50	50
Short-circuit making current	kA	50	50
Number of making operations
-main switch (CL E3)	n	5	5
-earthing switch 50kA(CLE2)	n	3	3
-earthing switch 31,5kA(CL E3)	n	5	5
Creepage distance	mm	620	620/960
Mechanical endurance Co	n	5000	5000
Ambient air temperature limits	oC	-40;+60	-40;+60
Standards	IEC62271-1;IEC62271-102;IEC 62271-103