ZW8-12-陕西西电通中电器有限公司

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ZW8-12

☆　introduce　

ZW8-12 Outdoor high voltage vacuum circuit breaker

1.Applying conditions:

Ambient temperature;-30℃----+40℃

Altitude：≤1000m；（Not including special requirement）

Wind speed: ≤34m/s

Ambient pollution：III

Max daily temperature difference:25℃

Service environment：no frequent violent vibration

2. Overall drawing

Overall drawing(drawing 1)

1. Rings 2.Insulating sleeving 3. Tank cover 4. Sealing element 5. Lifting rings 6.Tank

7. Dehydrating breather 8. Opening &Closing indicator 9. Operating mechanism 10. Nameplate

3. Technical specification(Table2)

No.	Item		Unit	Data
1	Rated voltage		kV	12
2	Rated power frequency withstand voltage/1min	Dry	kV	42
		Wet		34
3	Rated lighting impulse withstand voltage		kV	75
4	Rated frequency		Hz	50
5	Rated current		A	630
6	Rated short circuit breaking current		kA	12.5	16	20
7	Rated short circuit making current		kA	31.5	40	50
8	Rated short time withstand current(4s)		kA	12.5	16	20
9	Rated withstand current(peak)		kA	31.5	40	50
10	Rated duration of short circuit		s	4
11	Rated operating sequence			O—0.3s—CO—180s—CO
12	Opening time		ms	≤100
13	Rated short circuit breaking times		Times	30
14	Breaking current of 2 out-phase points grounding fault		KA	17.4
15	Arc duration		ms	≤15
16	Mechanical life		Times	10000

4. Mechanical property（table 3）

No.	Item	Unit	Data
1	Clearance between open contacts	mm	11 ± 1
2	Over-travel of contact	mm	3±0.5
3	Bounce time of contact closed	ms	≤ 2
4	Simultaneity of 3 phase contact opened&closed	ms	≤ 2
5	Contact force	N	1600
6	Average opening speed	m/s	1.2±0.4
7	Average closing speed	m/s	0.65±0.15
8	Opening time	ms	30≤t≤70
9	Closing time	ms	35≤t≤60
10	Wearing for contract permitted	mm	3
11	Resistance for main circuit	μΩ	≤200

5.Secondary connection diagram

Electrical protection connection diagram of circuit breaker（DC)

Remark：Current transformer is connected with terminal 200/5 before delivery. If user want to use terminal 400/5 or 630/5,please connect JX-31 to JX-32 or JX-33 and connect JX-34 to JX-35 or JX-36.

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