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ZW68-12 Green CB

ZW68-12/T630-20 outdoor high-voltage AC circuit breaker is an outdoor high-voltage AC switchgear with three-phase AC 50Hz and rated voltage of 12kV, which is mainly used for breaking and closing load current, overload current and short-circuit current in power system. The products completely comply with GB11022, GB1984, DL/T402 and the general technical specifications of 12kV-24kV outdoor pole-mounted circuit breakers of State Grid Corporation of China, and have passed all type tests. It is suitable for protection and control in power distribution systems of substations and industrial and mining enterprises, and is more suitable for rural power grids and places with frequent operation. It can also be used as a sectional switch of a power grid, and can realize distribution network automation after being added with a controller.

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Product Details

Product Details：
ㆍ The environment-friendly dry air is adopted as an insulating medium, so that the use of sulfur hexafluoride is avoided, low-temperature liquefaction risk is avoided, ensuring environment-friendly, safe and maintenance-free performance.
ㆍ The pole-mounted circuit breaker and the FTU feeder terminal can operate normally at the air temperature between the minimum temperature of -40℃ and the maximum temperature of +55℃, and have the characteristics of anti-condensation and anti-pollution, and are specially used for outdoor operation environment.
ㆍ The vacuum circuit breaker, the disconnecting switch, the current transformer, the voltage sensor and the operating mechanism are all sealed in the box body by adopting the fully-insulated, fully-sealed and miniaturized design, so that the vacuum circuit breaker, the disconnecting switch, the current transformer, the voltage sensor and the operating mechanism are all sealed in the box body, the structure is compact, the protection level is high, and the installation and the transportation are convenient.
ㆍ The outer components are high-quality aviation plug-ins, which are convenient to connect and reliable to plug in. The current circuit has the function of anti-open circuit, which can be inserted and unplugged at will during the line operation.
ㆍ The product has intelligent function and can realize the automatic functions of distribution network such as line loss measurement, earthing fault line selection and line protection. The FTU feeder terminal is configured to support various power communication protocols such as wireless public network and optical fiber Ethernet. Configure backup power supply to ensure switch control and communication power consumption within 48 hours after line power failure.

Technical Parameters

No.	Item					Unit	Value
1	Rated voltage					kV	12
2	Rated insulation level	1min power frequency withstand voltage (phase-to-phase, phase-to-earth (wet test)/isolating distance)				kV	42/48	See ★Note 1
		Lightning impulse withstand voltage (phase, phase/isolating distance)					75/85
3	Rated frequency					Hz	50
4	Rated current					A	630
5	Rated short-time withstand current					kA	20
6	Rated peak withstand current					kA	50
7	Rated short-circuit current dduration					s	4
8	Rated short-circuit breaking times					Time	30
9	Rated short-circuit breaking current				Effective value of AC component	kA	20
					DC component		52%
10	Rated operating sequence						O-0.3s-CO-180s-CO
11	Rated short circuit making current					kA	50
12	Rated out-of-step breaking current						5
13	Rated out-of-phase breaking current					kA	17.4
14	Rated capacitive switching current (Class C2)				Rated cable charging breaking current (effective value)	A	25
15	Rated resistance of main circuit					μΩ	≤200
16	Mechanical life		Circuit Breaker (CB)			Time	10000
			Disconnecting switch (manual)				3000
17	1min power frequency withstand voltage of secondary circuit					kV	2
18	Auxiliary and control loop			Rated supply voltage		V	DC:220、110、48 AC:220、110
				Rated supply frequency		Hz	50
19	Terminal static load			Static horizontal force		N	Longitudinal: 500; Horizontal: 400
				Static vertical force			Up: 500; Down: 500
20	Rated pressure (20℃ absolute pressure)					Mpa	0.02
21	Annual leakage rate					Year	≤0.1%
22	Partial discharge					pC	＜20
23	Moisture content of dry air (20℃)					μL/L	≤150（handover acceptance value）
							≤300（allowable operating value）
24	Protection level oof gas-filling compartments					IP67
25	Overall dimension mm (LxWxH)					920x720x830
26	Weight					175 kg