ZN85-40.5 High Voltage Vacuum Circuit Breaker | Reliable Circuit Protection Solutions

Description

ZN85 is a high voltage vacuum circuit breaker with frequency of 50Hz and rated voltage of 40.5kV. It is very suitable for use in industrial and mining enterprises, power plants and substations where frequent operation is required. Its stable performance and easy installation make it an ideal choice for control and protection in high-voltage transmission and distribution systems.

Padrão do produto

ZN85-40.5 high voltage vacuum circuit breaker complies with the following standards:

IEC 62271-100 High voltage AC circuit breaker
GB/T 11022-2011 Standard General Specification for High Voltage Switchgear and Controlgear
GB 1984 High voltage AC circuit breaker
GB 311.1 Insulation coordination of high-voltage power transmission and distribution equipment

Working conditions

Normal operating conditions:
Ambient temperature: -40℃ to +40℃ (temperature below 35℃ within 24 hours)
Relative humidity: ≤95% (daily average) or ≤90% (monthly average)
Altitude: ≤1000 metros

Parâmetros técnicos

1.1 Technical parameters

Item Unit		Reference value
Rated yoltag	kV	40.5
Lightning impulse withstand voltage	kV	185
Rated insulation level 1min power-frequency withstand voltage	kV	95
Rated frequeng,	Hz	50/60
Corrente nominal	A	630/1250/1600/2000/2500/3150
Corrente nominal de interrupção de curto-circuito	kA	20/25/31.5
Rated short-circuic making current (peak value	kA	506,380
Corrente nominal de resistência de curta duração	kA	20/25/31.5
Rated withstand current (peak value	kA	506,380
Required operation sequence		0-0.3s-CO-180s-CO
Rated short-circuit duratio	5	4
Times of making-breaking with the rated short-circuit curren	Time	30
Vida mecânica		Nível M2
Weigh	kg	350

1.2 Mechanical Parameters

ltem	Unidade	Reference value
Gap of contacts	mm	20±2
Contact overtravel	mm	6±1
Average making speed	m/s	0.6±0.2
Average breaking speed	m/s	1.5~2.0
Bounce time in contact making	ms	≤3
Non-synchronous making/breaking of contact	ms	≤2
Resistance of the circuit of each phase	μ Q	≤80
Permissible total wear thickness of the moving/fixed contact	mm	3

Dimensão geral e de instalação

Overall dimension of ZN85-40.5(insulating cylinder handcart)indoor high-voltage alternating-current circuit breaker

Rated current(A)	630	1250	1600	2000	2500
Rated breaking current(kA)	202,531.5	202,531.5	2,531.5	31.5	31.5
Fixed contact size D(mm)	φ35	φ49	中55	φ79	φ109
Interphase distance(mm)	300±1.5
Handcart travel(mm)	610±2