Protection, which is the termination of short-circuiting and overload fault currents while preserving service to unaffected circuits, is one of the fundamental purposes of switch gear. Switch gear also isolates circuits from the power supply. Switchgear is also used to improve system availability by enabling many sources to supply a load at the same time.
This device is used to protect low and medium-voltage systems. It is commonly used in 11kV systems. For 630A, a load break switch (LBS) mechanism is offered, and an overcurrent protection strategy is implemented using an HRC fuse. The panel has three CT (current transformers) and three PT (potential transformers) for detecting system current and voltage. The HRC fuse protects against overload and short circuits. The panel also has three-ampere meters and one voltmeter with a selection switch.
The panel dimension is 900 mm x 1000 mm x 1800 mm and weighs about 450 kg. The construction is metal clad and employs high grade steel of suitable thickness to provide safety and security.
- Long-term, trouble-free operation.
- The whole structure is made of metal.
- Isolation on the horizontal plane
- Extremely High Operational Reliability.
- Inspection and maintenance are simple.
- High thermal and dynamic strength.
- Arc-chutes for Special Bottles
- Currently, there are no apparent arcs in the interruption.
- A straightforward driving mechanism.
We, Smart Power & Technologies, develop and provide HT Load Break Switches with voltage ratings ranging from 3.3kV to 36kV and amp ratings ranging from 630 to 800. Our 11kV LBS switchgear panels are small enough to fit into any industrial space. Load break switches are available in both indoor and outdoor configurations for a wide variety of uses.
|Technical Specification11kV Series Load Break Switchgear Panels|
|Rated Voltage||12 KV||12 KV||24 KV|
|Rated Frequency||50 Hz||50 Hz||50 Hz|
|Rated Current||630 A||1250 A||630 A|
|Rated Peak Current||62.5 KA||62.5 KA||62.5 KA|
|Rated Short time current / 1 sec.||26.3 KA (3 sec)||26.3 KA (3 sec)||26.3 KA (3 sec)|
|Rated Making Current||62.5 KA||62.5 KA||62.5 KA|
|Rated Breaking Current||630 A||800 A||630 A|
|Impulse Voltage, Wave Shape 1.2/50 MS|
|i) To Earth||75 KV||75 KV||125 KV|
|ii) Between Poles||75 KV||75 KV||125 KV|
|iii) Between Open Contacts||85 KV||85 KV||145 KV|
|Power Frequency Test Voltage|
|iv) To Earth||28 KV||28 KV||55 KV|
|v) Between Poles||28 KV||28 KV||55 KV|
|vi) Between Open Contacts||35 KV||35 KV||70 KV|
|Breaking of Capacitance Load||50 A||50 A||25 A|
|Closed Loop Breaking Current COS ф = 0.31 ND||630 A||800 A||630 A|
|Rated Transformer Off Load Breaking Capacity||120 A||120 A||120 A|
|Rated Line Charging Breaking Capacity||90 A||90 A||90 A|
|Rated Cable Charging Breaking Capacity||90 A||90 A||90 A|
|Dimensions (Ref. Drg. Enclosed)|
|i) Between Poles (Centers) mm||150-210||150-210||175-250|
|ii) Between Open Contacts mm||140||140||235|
|iii) Between live parts and earth mm||130||130||210|
|Making Time 35 M. Sec|
|Arc Duration 5-20 M. Sec|