FLN36‑12D 12KV Indoor SF6 LBS

The FL(R)N36‑12D Indoor High‑Voltage SF₆ Load Break Switch is indoor‑type switchgear rated at 12 kV. It uses sulfur hexafluoride (SF₆) gas as the arc‑extinguishing and insulating medium and features three operational positions: closing, opening and earthing. It boasts a compact footprint, easy installation and operation, and excellent adaptability to diverse service environments. When assembled with other electrical components, the FL(R)N36‑12D delivers integrated control and protection functions. It is applied as control‑and‑protection equipment for industrial‑mining enterprises, civil power supply systems and secondary substations. Among its variants, the load‑break‑switch‑fuse combination apparatus is well‑matched with transformer protection characteristics, making it particularly suitable for ring‑main‑unit (RMU) power supply units. Model FLN36‑12D/630‑20 Indoor High‑Voltage SF₆ Load Break Switch and Model FL(R)N36‑12D/100‑50 Combination Apparatus conform to Chinese National Standard GB 3804, *3 kV‑63 kV AC High‑Voltage Load Break Switches* (equivalent to IEC 60265‑1), and GB 16926, *AC High‑Voltage Load‑Break Switch‑Fuse Combination Apparatus* (equivalent to IEC 60420). Should you require further details, please feel free to contact us. Our technical team is ready to work out tailored solutions for you.

Operating Conditions

Ambient air temperature: Upper limit +40 °C, lower limit −15 °C;

Altitude: Maximum installation altitude shall not exceed 1 000 m;

Ambient humidity: Daily average relative humidity ≤ 95 %, monthly average relative humidity ≤ 90 %

Detailed parameters

Item		Unit	parameters
			FLN36‑12D/T630‑20 Load Break Switch	FLN36‑12D/100‑50 Load Break Switch‑Fuse Combination Apparatus
Rated Voltage		KV	12
Rated Frequency		Hz	50
Rated Current		A	630	100
Rated Insulation Level	1‑min Power‑frequency Withstand Voltage	KV	To earth / between phases: 42; Across open contacts: 48
	Lightning Impulse Withstand Voltage (peak value)		To earth / between phases: 75; Across open contacts: 85
	Rated Withstand Voltage at Zero Gauge Pressure		12
Rated Thermal Withstand Current (3s)		KA	20
Rated Peak Withstand Current		KA	50
Rated Short‑circuit Making Current		A		125
Rated Closed‑loop Breaking Current		A	630
Rated Active Load Breaking Current		A	630
Rated Cable‑charging Breaking Current		A	10
Rated Short‑circuit Breaking Current		KA		50
Rated Transfer Current		A		1700
Fuse Type				SKLDJ‑12KV/100A*
Impact Output Energy		J		1±0.5
Rated Thermal Withstand Current (3s) of Earthing Switch		KA	20
Rated Peak Withstand Current (peak, 2s) of Earthing Switch		KA	50
Rated Peak Withstand Current of Earthing Switch		KA	50
Mechanical Endurance	Load Break Switch	OPS	3000
	Earthing Switch	OPS	2000
Air Insulation Distance between Live Parts and to Earth		mm	＞125
SF₆ Gas Pressure (gauge pressure at 20℃)		Mpa	0.05
Annual Leakage Rate			＜1%
Closing & Opening Time Deviation		ms	＜3
Circuit Resistance		μΩ	＜65
Maximum Manual Operating Torque		N·m	85
Rated Operating Voltage		V	AC110, DC48, AC220