ZWP-24KV Solid sealed pole type vacuum high-voltage circuit breakerDetailed product description：

ZW □ -24 outdoor high-voltage AC vacuum circuit breaker is an outdoor switch equipment with three-phase AC 50Hz and rated voltage of 24kV. It is suitable for opening and closing various types of loads and frequent operating situations, and is suitable for the construction and renovation of power equipment in urban networks, rural networks, mines, railways, etc. This product is the earliest developed 24kV outdoor high-voltage switchgear suitable for China's national conditions, based on absorbing advanced foreign technology and domestic raw materials and processes. It has its own intellectual property rights and multiple patented technologies, filling the gap in domestic 24kV voltage level outdoor switchgear. Compared with similar international products, it has the characteristics of miniaturization, maintenance free, and intelligence. At the same time, this product has no pollution to the surrounding environment and is a green and environmentally friendly product.

Product features
The shell is made of high-quality stainless steel material or ordinary steel plate treated with Dacromet anti rust technology and then sprayed with UV resistant varnish. The product has excellent environmental resistance such as corrosion resistance and salt spray resistance.
The insulation part adopts epoxy resin and silicone rubber composite insulation material, with high insulation level, strong anti pollution ability, ozone resistance, UV resistance, hydrophobicity, and high and low temperature resistance. There is no transformer oil or sulfur hexafluoride gas inside the box, which meets the requirements of oil-free transformation and environmental protection.
The operating mechanism is a spring operated mechanism, which can be manual or electric. If necessary, a remote control device and a surge avoidance device can be installed to avoid closing. The required external power supply power should not exceed 70W, making it easy to equip with a backup power supply. Design a unique buffering device with excellent performance, minimal rebound, and low noise.
The arc extinguishing chamber adopts special stainless steel brazing technology, which does not require electroplating, has high welding quality, stability and reliability, and low air leakage rate. Special ceramic metallization formula and advanced ceramic metallization technology are used in the production process to ensure the airtightness of the product, with a tensile strength greater than 130Mpa and complete one-time sealing.
The 5 current transformers are made of high-quality magnetic materials and epoxy resin and silicone rubber composite insulation, with advantages such as large capacity, high dynamic and thermal stability multiple, high precision level, maintenance free, and high reliability.
According to user needs, it can be combined with corresponding controllers to form automatic reclosers and segmenters, which are ideal equipment for achieving distribution network automation.

Normal usage conditions
Surrounding air temperature:+40 ℃~-40 ℃ Daily temperature difference: 25K
B wind speed not exceeding 35m/s
c、 The protection level of the chassis is IP64
d、 Consider condensation and precipitation
e、 Earthquake intensity not exceeding level 8
f、 The solar radiation intensity does not exceed 1000W/㎡ (equivalent to 700Pa on a cylindrical surface)
h、 Any requirements beyond these technical specifications shall be agreed upon by the user and the manufacturer.
Number Name Unit Value
Rated voltage kV 24
Rated current A 630/1250
3 rated frequency Hz 50
4 rated thermal stability current A 420/25k
5 rated short-circuit breaking current
A 520/25k
6 rated dynamic stability current (peak) A 650/63k
7 rated short-circuit closing current (peak) kA 50/63
8 Thermal stability time S 4
9 Rated operating sequence S SO-0.3s-CO-180s-C
10 rated insulation level, 1-minute power frequency withstand voltage, phase to phase, ground/fracture kV 50/65
Rated lightning impulse withstand voltage (peak) phase to phase, ground/fracture 95/125
Secondary circuit 1-minute power frequency withstand voltage 2
11 mechanical life cycles 10000
12 rated short-circuit breaking current breaking times 30
13 rated current breaking times 10000
Table 2 Rated Parameters of Operating Mechanism
Number Name Unit Value
1. Rated power of energy storage motor W ≤ 70
2. Closing time for energy storage
S ≤8
3. Working voltage of energy storage motor V AC220 110
DC24 110 220
4. Closing coil tripping voltage V AC220 110
DC24 110 220
5-strip coil tripping voltage V AC220 110
DC24 110 220
6 overcurrent coil trip current A 5
Table 3 Mechanical characteristic adjustment parameters of circuit breakers
Number Name Unit Value
1 contact opening distance mm 12 ± 1
2 overtravel 3 ± 1
3-phase center distance 380 ± 1.5
4. Non synchronous opening and closing of three-phase, ms ≤ 2
5 contact closing bounce time ≤ 2
6 Closing time 25-80
7 opening time 23-50
8. Average opening speed m/s 1.1-1.7
9. Average closing speed 0.5~0.9
The resistance of the main electrical circuit is 10 μ Ω≤ 100

ZWP-24KV/630 (1250) -20 (25) solid sealed pole vacuum circuit breaker