ZW32-24 outdoor vacuum pole-mounted circuit breaker (hereinafter referred to as the circuit breaker) is a control and protection device used in a 24kV, 50Hz three-phase AC medium-voltage distribution network. It is primarily used for switching and interrupting load currents, overload currents, and short-circuit currents in power transmission lines. It is suitable for use in substations and industrial and mining enterprise distribution systems for protection and control purposes.

This circuit breaker features a pole-mounted, dry-type structure with reliable insulation, long electrical life, and maintenance-free operation. It is particularly suitable for applications requiring frequent operations. It is also ideal for installation in rural power grids with limited maintenance and repair capabilities. The circuit breaker can also function as a sectionalizer in the power grid, and when equipped with a controller, it can achieve distribution network automation.

Installation Method, Compliance with Standards and features:

Installation Method :Outdoor Bracket Mounting and Pole Fixed Installation
Product Compliance with Standards: GB/T1984-2014, GB/T11022-2011.
Product features: a pole-mounted, dry-type structure with reliable insulation, long electrical life, and maintenance-free operation.

Product Specifications

Specification Sheet

No.	Name	Unit	Data
1	Rated Voltage	kV	24
2	Rated Frequency	Hz	50
3	Rated Current	A	630/1250
4	Rated Power Frequency Withstand Voltage	kV	50(Across the contact gaps) / 65(To Ground)
5	Rated Lightning Impulse Withstand Voltage	kV	95
6	Rated Short-Circuit Breaking Current	kA	25
7	Rated Short-Circuit Making Current (Peak)	kA	63
8	Rated Withstand Current (Peak)	kA	63
9	Rated Duration of Short-Circuit	s	4
10	Operating Cycles at Rated Short-Circuit Breaking Current	Times	30
11	Mechanical Endurance	Times	10000
12	Standard Operating Sequence	-	O-0.3s-CO-180s-CO
13	Allowable Wear Thickness of Contact	mm	≤3

Mechanical Characteristics

No.	Name	Unit	Data
1	Clearance between Moved and Fixed Contact	mm	12±1
2	Contact Overtravel	mm	3±1
3	Average Closing Speed	m/s	0.5～0.9
4	Average Opening Speed (Average Speed of First Opening at 6mm)	m/s	1.1～1.7
5	Rated Contact Pressure	N	2000±200N
6	Closing Time	ms	25～80
7	Opening Time	ms	20～50
8	Contact Bouncing Duration at Closing Operation	ms	≤2
9	No-Simultaneity of Closing/Opening Operations of 3-Phase	ms	≤2
10	Main circuit resistance	uΩ	≤100

Product Advantages

ZW32-24 outdoor vacuum pole-mounted circuit breaker has many advantages:

The shell is made of high-quality stainless steel or ordinary steel plate, which is treated with a Dacromet anti-rust process and then sprayed with UV-resistant varnish. The product has excellent corrosion resistance, salt spray resistance, and other environmental resistance performance.

The insulation part uses composite insulation materials of epoxy resin and silicone rubber, with high insulation grade, strong anti-pollution ability, ozone resistance, UV resistance, hydrophobicity, and resistance to high and low temperatures. The box does not contain transformer oil or SF6 gas, meeting the requirements for oil-free transformation and environmental protection.

The operating mechanism is a spring operating mechanism, with both manual and electric options. A remote control device and inrush current avoidance device can be installed if needed.. The required external power supply is no more than 70W, making it easy to equip with a backup power source. The uniquely designed buffer device has excellent performance, minimal rebound, and low noise.

The arc extinguishing chamber uses special stainless steel brazing technology, eliminating the need for electroplating. The welding quality is high, stable, reliable, and has a low leakage rate. The manufacturing process uses a special ceramic metallization formula and advanced ceramic metallization technology, ensuring the product's airtightness. The tensile strength is greater than 130 MPa, and the sealing is completed in a single operation.

The current transformer uses high-quality magnetic materials and composite insulation of epoxy resin and silicone rubber. It has the advantages of large capacity, high dynamic thermal stability multiple, high accuracy, maintenance-free operation, and high reliability.

According to user needs, it can be paired with the corresponding controller to form an automatic recloser or sectionalizer, making it an ideal device for achieving distribution network automation.