1. Environmental Conditions

• Suitable Altitude: 1000m ~ 4000m
• Suitable Temperature: -40℃ ~ +45℃
• Relative Humidity: Daily mean ≤95%, monthly mean ≤90%
• No conductivity dust.
• No insulation object with devastating metal and corrosive gas.
• No violent vibration and striking.
• No explosive danger and fire.

2. Technical Data

 

Load Switch:

Type	Rated voltage (KV)	Max working voltage (KV)	Rated current (A)	Machine stabling current (A)	Heat-stabling current (A)
FN5-12	12	12.7	400        630	25	10/2

 

Load Switch with Fuse:

Type	Rated voltage (KV)	Rated current  (A)	Max breaking current (KV)	Max cut-off capacity (mva)	Current peak when cutting off limit short-circuit (KA)
RN3-3	3	10-50	40	200	24.5
		75-100			24.5
		200			36
RN3-6	6	10-50	20	200	14
		75			14
		100			19
		200			25
RN3-12	12		12	200
		10-50V			8.6
		75			8.6
		100-50			15.5

 

 

 

 3. Application

 

 

    FN5-12R (L) series indoor AC high voltage load switch a fuse combination is absorbing advanced technology from foreign countries which is designed to combine with China's power requirements. the performance of the product has reached to the standards of IEC420 "AC HV load switch - fuse combinations" (1990 edition) and GB3804 "3-63KV AC high voltage load switch" which has experienced all of the tests and long-term trial operation assessment of the test. Compared with similar products of foreign countries, its technical parameters has reached to the level of similar products. It is small and light, applied to ring main unit and box-type substation, which is widely used in power distribution of 10KV line and effectively avoid phase loss running of the equipment.