ZN12-12 series high voltage vacuum circuit breaker

The ZN12-12 series vacuum circuit breaker is a rated voltage of 12kV, and the three-phase AC 50Hz indoor high voltage switch equipment is a product manufactured by the German Siemens technology.
The operating mechanism of the circuit breaker structure is a spring energy storage type, which can be operated by AC or DC, or can be operated manually. The circuit breaker has simple structure, strong breaking ability, long life, complete operation function, no explosion danger, and simple maintenance. It is suitable for controlling or protecting power transmission and distribution systems such as power plants and substation, and is especially suitable for switching important loads and frequent operations. place. This product meets the GB1984-89 AC High Voltage Breaker standard.
The operating mechanism of the circuit breaker structure is a spring energy storage type, which can be operated by AC or DC, or can be operated manually. The circuit breaker has simple structure, strong breaking ability, long life, complete operation function, no explosion danger, and simple maintenance. It is suitable for controlling or protecting power transmission and distribution systems such as power plants and substation, and is especially suitable for switching important loads and frequent operations. place. This product meets the GB1984-89 AC High Voltage Breaker standard.

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Description

· operating environment (vacuum circuit breaker 3AF type (zn12-12 series))
1. Ambient temperature: not more than + 40 ℃, no less than 25 (40 ℃) *.
2. Altitude: no more than 2000m.

· main technical parameters (vacuum circuit breaker type 3AF (zn12-12 series))

project	unit	unit
project	unit	I	ll	lIl	lV	V	Vl	VII	VIII	IX	X
The rated voltage	kV	12	12	12	12	12	12	12	12	12	12
Rated current	A	1250	1600	2000	2500	1600	2000	3150	1600	2000	3150
Rated short circuit breaking current	kA	31.5	31.5	31.5	31.5	40	40	40	50	50	50
Dynamic stable current (peak)	kA	80	80	80	80	130	130	130	140	140	140
4S thermally stable current (50kA is 3s)	kA	31.5	31.5	31.5	31.5	40	40	40	50	50	50
Rated short circuit closing current (peak)	kA	80	80	80	80	100	100	100	125	125	125
Rated short circuit current breaking times	A	50				30			12
Rated operation sequence		Score -0.3s- composite score -180s- composite score							Score -0.3s- composite score -180s- composite score
Rated lightning impulse withstand voltage (full wave)	kV	5
Rated short-time frequency withstand voltage (1min)	kV	42
Closing time	ms	≤75
Break-brake time	ms	≤60(50)
Mechanical life	A	20000(I～IV) 10000(V-X)
Rated current breaking times	A	20000(I～lV) 10000(V-X)
Power of energy storage motor	W	275
Rated voltage of energy storage motor	V	110 220
Energy storage time	s	≤15
Rated voltage of closed electromagnet	V	AC、DC：110 220
Rated voltage of parting electromagnet	V	AC、DC：110 220
Rated voltage of energy storage shunt tripper	V	AC、DC：110 220
Rated voltage of the voltage loss tripper	V	AC、DC：110 220
Rated current of overcurrent tripper	A	5
Rated current for the auxiliary switch	A	AC10 DC5

Note: the values in brackets refer to the time when the energy storage tripper is used to break off.

· mechanical characteristic adjustment parameters (vacuum circuit breaker 3AF type (zn12-12 series))

project unit Technical parameters

I,II,III,IV V,Vl,Vll VII,IX,X

Contactor trip

mm 11±1 11±1 11±1

Contact overtravel mm 8±2 8±2 4+1
-0.5

Closing speed m/s 0.6～1.4

Break-brake speed m/s 1.0～1.8

Contact closing and tripping time ms ≤2

Interphase center distance mm 210±1.5 230±1.5 250±1.5 275±1.5 280±1.5

Three - phase contact closing timing ms ≤2

Resistance of each phase loop μΩ ≤35

Note: closing speed refers to the average speed at the last 6mm of contact, and closing speed refers to the average speed at the first 6mm of contact.
The contact opening distance of the inlet arc extinguishing chamber is 8 + / 1mm(31.5kA, 40Ka) from Siemens. Us Westinghouse is 8 mm(31.5kA); 8 + / - 1 mm (40 ka). · general structure (vacuum circuit breaker type 3AF (zn12-12 series))

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project	unit	Technical parameters
project	unit	I,II,III,IV			V,Vl,Vll	VII,IX,X
Contactor trip	mm	11±1			11±1	11±1
Contact overtravel	mm	8±2			8±2	4+1 -0.5
Closing speed	m/s	0.6～1.4
Break-brake speed	m/s	1.0～1.8
Contact closing and tripping time	ms	≤2
Interphase center distance	mm	210±1.5	230±1.5	250±1.5	275±1.5	280±1.5
Three - phase contact closing timing	ms	≤2
Resistance of each phase loop	μΩ	≤35