The ZN28A-12 series indoors high vacuum circuit breaker -Zhejiang Baosn Electrical Co.,Ltd.

The ZN28A-12 series indoors high vacuum circuit breaker

● Outline

The ZN28A-12 series indoors high vacuum circuit breaker is the three phase ac 50Hz rated voltage is the 10kv indoors installment, mainly is installs in the stationary switch cabinet makes the electrical facility for the industry and mining enterprise power plant and the transformer substation the protection and the control using of, and is suitable the frequent operation the place This model vacuum circuit-breaker conforms to GB1984 - 1,989 "A.c. high voltage Circuit breaker" the standard stipulation

● Use environment and condition

A. The ambient temperature is not higher than +40 ℃ , is not lower than □ 10 ℃ (permission in -30 ℃ time storage and transport);
B. The sea dials highly is not bigger than 1000 or is not bigger than 3000 (sea to dial highly should in ordering note);
C. The air relative humidity date mean value is not bigger than 95% The monthly mean value is not bigger than 90% full gas and steams the steam pressure daily average value not to be bigger than 2.2×10-3Mpa; The monthly mean value is not bigger than 1.8 × 10-3Mpa;
D. Earthquake does not surpass 8;
E. Does not have the fire, the detonation, the serious contamination chemistry corrosion and the fierce vibration place

● Product main technology parameter

A. The fixed parameter see Table 1

Serial number	Name	Unit	ZN28A-12/ 1000.1250-20	ZN28A-12/ 1250.1600-25	ZN28A-12/1600 2000-31.5	ZN28A-12/ 1250.3150-40
1	rated voltage	kv	12	12	12	12
2	2 nominal currents	A	630.1000.1250	630.1250.1600	1250.1600.2000	2000.2500.3150
3	fixed short-circuit drop-out current	KA	20	25	31.5	40
4	fixed to short-circuit the pass fixed to gather electric current	KA	50	63	80	100
5	to move the steady state current	KA	50	63	80	100
6	Fixed thermally stable electric currents	KA	20	25	31.5	40
7	fixed thermally stable time	S	4	4	4	4
8	fixed to short-circuit the drop-out current to open break the number of times	次	50	50	50	50
9	fixed operations sequence		分 — 0.3s — 合分 — 180s—合分
10	1min labor frequency pressure resistance (Has Effect value)	kv	42	42	42	42
11	Lightning surge voltage	kv	75	75	75	75
12	Mechanical life	次	10000	10000	10000	10000

B. The machinery adjustment parameter see Table 2

Serial number	Name	Unit	Data
1	The contact opens the distance	mm	11 ± 1
2	Contact travelling schedule	mm	4 ± 1
3	Three-phase minute gathersFloodgate no Same time nature	ms	≤ 2
4	gathersFloodgateThe contact bounces the time	ms	≤ 2
5	Alternates with the center distance	mm	250 ± 5
6	Evenly divides equally the floodgate speed (in front of contact oil buffer)	m/s	0.7 ± 1.3
7	Average gathersFloodgate speed	m/s	0.4 ± 0.8
8	MovesContact accumulation permission attrition thickness	mm	3
9	Each electric conduction return route resistance	μΩ	≤ 45(31.5KA 为 40)

• The contour and installs the size