Indoor high-voltage vacuum circuit breakerDetailed product description：

1. Overview
The CV2-12 indoor high-voltage vacuum circuit breaker has undergone strict reliability testing and passed the full project type test. It is suitable for AC 50Hz, rated voltage 12kV, and rated current 630A~1250A, and is used for protection and control of power lines and power equipment in industrial and mining enterprises.

There are fixed and handcart types, and the handcart type is suitable for armored central cabinets such as KYN28A. Strict cabinet matching tests ensure interchangeability;
Rated power frequency withstand voltage of 42kV/1min, rated lightning impulse withstand voltage of 75kV;
Rated short-circuit breaking current 25kA~31.5kA, rated short-time withstand current 25kA~31.5kA/4s;
Adopting the APG process of first-class manufacturers to seal the pole, maintenance free, adaptable to a wide range of environments, safe and reliable, suitable for frequent operation or multiple breaking of short-circuit currents;
Using hundreds of thousands of CW series low-voltage circuit breaker spring operating mechanisms with safe operation experience, complete accessories to meet different needs, strict testing methods, and complete characteristic curve records to ensure high product quality;

According to the GB 1984 standard, it has extended electrical life E2 level, extended mechanical life M2 level, and capacitive current switching C2 level;

The circuit breaker meets the following standards:
IEC62271-100 GB 1984 "High Voltage AC Circuit Breakers"
IEC60694 GB/T 11022 Common Technical Requirements for High Voltage Switchgear and Control Equipment Standards
JB 3855 High Voltage AC Vacuum Circuit Breaker
DL/T 403 "Technical Conditions for Ordering 12kV~40.5kV High Voltage Vacuum Circuit Breakers"
DL/T615 "Guidelines for Parameter Selection of AC High Voltage Circuit Breakers"

2. Normal usage conditions
Ambient temperature
Maximum temperature:+40 ℃;
The average value measured within 24 hours shall not exceed+35 ℃;
Minimum temperature: -5 ℃.
ambient humidity:
The daily average relative humidity is not greater than 95%;
Monthly average relative humidity not exceeding 90%;
The daily average vapor pressure shall not exceed 2.2 × 10-3MPa;
The monthly average vapor pressure shall not exceed 1.8 × 10-3MPa.
Altitude: not exceeding 1000m;
Seismic intensity: not exceeding 8 degrees;
The surrounding air is not significantly polluted by dust, smoke, corrosive gases and/or flammable gases, vapors and salt spray;
The amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6kV.

Special usage conditions
If the working conditions used by the user differ from normal usage conditions, such as installation at an altitude exceeding 1000m, ambient air temperature exceeding the limit specified for normal usage conditions, or high temperature prone to condensation, please consult with our company.

3. Technical parameters
Technical Parameters Table of CV2-12 Indoor High Voltage Vacuum Circuit Breaker

project		unit	data
Rated voltage Ur		kV	twelve
Rated insulation level	1-minute power frequency withstand voltage Ud (effective value)	kV	Fracture, phase to phase, ground to ground	forty-two
	Lightning impulse withstand voltage Up (peak)	kV	Fracture, phase to phase, ground to ground	seventy-five
Rated frequency fr		Hz	fifty
Rated current Ir		A	630, 1250, 1600, 2000, 2500, 3150, 4000
Rated short-circuit breaking current Isc (effective value)		kA	25, 31.5, 40, 50
Rated peak withstand current Ip		kA	63, 80, 100, 125
Rated short-circuit closing current		kA	63, 80, 100, 125
Rated short-time withstand current Ik (effective value)		kA	25, 31.5, 40, 50
Rated short-circuit duration tk		s	four
Rated back-to-back capacitor bank breaking current Ibb (effective value)		A	four hundred
Rated back-to-back capacitor bank closing inrush current Ibi (peak)		kA	20 (frequency 4250Hz)
Rated cable charging breaking current Ic (effective value)		A	twenty-five
Rated operating sequence		Automatic reclosing: O-0.3s-CO-180-CO
		Non automatic reclosing: O-180s-CO-180-CO
Rated power supply voltage Uop for closing and opening devices		V	AC：110, 220； DC：110, 220
Rated power supply voltage Ua of auxiliary circuit		V	AC：110, 220； DC：110, 220
Mechanical lifespan*	210mm phase to phase distance circuit breaker	time	twenty thousand
	Circuit breakers with phase spacing of 150mm and 275mm		ten thousand
Classification: Mechanical life/Electrical life/Capacitive current breaking		M2/E2/C2