ZN85-40.5 Handcart Type Vacuum Circuit Breaker

Overview 

The ZN85-40.5 handcart type vacuum circuit breaker stands as a pinnacle of indoor high-voltage switchgear technology, tailored for three-phase AC systems operating at 50Hz and rated at 40.5kV.   This pivotal device serves industrial and mining enterprises, power generation facilities, and electrical substations, adeptly managing load currents, overload currents, and fault currents, especially in scenarios demanding frequent operation.   Its design, manufacturing, and testing processes adhere strictly to the GB/T 11022-1999 standards and other relevant criteria, ensuring unparalleled performance and safety..

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Environmental Conditions

• The upper limit of ambient temperature is +40C, and the average value measured within 24 hours does not exceed 35C;  Lower limit -15℃.

• The altitude does not exceed 1000m.

• Relative humidity: the daily average does not exceed 95% The monthly average value does not exceed 90%.

• Water vapor pressure: daily average does not exceed 2.2kPa, monthly average does not exceed 1.8kPa.

• The surrounding air is not significantly contaminated by dust, smoke, corrosive or combustible gases, vapors and salt spray.

• When used under the above normal environment and other conditions specified in GB/T11022-1999, the user can negotiate with the manufacturer to solve the problem.
  

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Product Features

• Advanced Arc Extinguishing and Power Interruption: Leveraging cutting-edge vacuum arc extinguishing technology, this circuit breaker minimizes arc duration and enhances power interruption capabilities, facilitating stable system operations.

• Robust Handcart Structure for Enhanced Safety: Its handcart design simplifies installation and maintenance processes, incorporating "five-prevention" safety features to safeguard operators.

• Exceptional Insulation Quality: The use of premium insulation materials and composite insulated pole columns guarantees consistent insulation performance, even under challenging humidity or extreme conditions.

• Versatile Operation: Designed for both manual and electric operation modes, it accommodates remote control functionalities to meet the dynamic needs of contemporary electrical grids.

• Modularity and Compatibility: Its modular design ensures ease of assembly and disassembly.   When paired with various high-voltage switchgear like the KYN61-40.5, it demonstrates remarkable compatibility.

• Broad Application Spectrum: Beyond its traditional use in industrial, mining, and electrical substations, it's also suitable for any setting that requires reliable power interruption and safety mechanisms.

• Adaptable to Diverse Environments: Engineered to operate flawlessly in temperatures ranging from -40℃ to +40℃, it is resilient against environmental fluctuations.

• Cost-Effective with Minimal Maintenance: The device's longevity and reduced maintenance demands translate into substantial savings in operational and maintenance expenses.
  

Technical Data

NO.	Parameter name	Unit	Numerical value
1	Rated voltage	kV	40.5
2	1 min power frequency withstand voltage	kV	95
3	Lightning impulse withstand voltage	kV	185
4	Rated frequency	Hz	50
5	Rated current	A	1250,1600,2000,2500
6	Rated short-time withstand current	kA	20,25,31.5
7	Rated peak withstand current	kA	50,63,80
8	Rated short circuit duration	S	4
9	Rated short-circuit breaking current	kA	20,25,31.5
10	Rated short-circuit closing current	kA	50,63,80
11	Rated operating sequence		0-0.3s- CO -180s- CO
12	Closing time	ms	50~100
13	Opening time	ms	35~60
14	Loop resistance (without contact arm)	μΩ	≤45 (rated current 2500A)
			≤60 (rated current 1600A; 2000A)
			≤80 (rated current 1250A; 630A)
15	Breaking time	ms	≤80
16	Rated short circuit breaking current breaking times	Times	20
17	Rated operating voltage	V	-110/~110,-220/~220
18	Rated working current of switching coil	A	1.05/(-110V);0.96/(-220V)
19	Mechanical life	time	10000

Schematic diagram of structure

Main circuit scheme diagram (mm)

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