Products Introduction

Indoor Solid Sealed Vacuum Circuit Breaker uses advanced APG automatic pressure gel technology to integrally cast the vacuum interrupter and main circuit into a fully enclosed solid‑sealed pole with high‑performance epoxy resin. It features ultra‑high insulation strength, self‑convection heat dissipation, full EMC compliance, online mechanical status monitoring, maintenance‑free design, and long service life. It is widely used in industrial plants, urban power grids, data centers, petrochemical, mining, and unattended substations.

Products Advantages

APG Solid Insulation Craftsmanship

One‑piece casting by APG automatic pressure gel process
Epoxy resin insulation strength: 5–6 times that of air
Partial discharge strictly controlled below 10pC
Built‑in buffer layer resists electric stress & environmental erosion
Completely solves pollution, condensation & insulation failure

Integrated Mechanical Status Monitoring

Built‑in stroke sensor & coil current sensor
Online monitoring of opening/closing & coil waveform
Real‑time capture of mechanical stagnation & coil abnormality
Transforms maintenance: "breakdown repair" → "predictive maintenance"

Maintenance-Free & Long Service Life

Fully sealed structure; no regular cleaning, oiling or insulation replacement
Mechanical life ≥30,000 times; electrical life ≥20,000 times
Service life up to 25 years
12‑months warranty; free replacement of core components under quality defect
Ideal for unattended substations

Flexible Voltage Grade Customization

Customizable: 12kV / 24kV / 40.5kV
Adjustable dimensions & mounting interfaces
Adapt to vertical / handcart / side‑mounted installation
Optimized for high altitude & extreme cold
ustom solution & quotation within 48 hours

why choose us

why choose our products

✅ 18 years of R&D & export experience; mature production & quality system
✅Full process inspection; products meet/exceed national & international standards
✅Professional R&D team; fast customized solutions for parameters & structure
✅Full life cycle support: pre‑sales consultation, on‑site commissioning, after‑sales warranty
✅ 48h quick response for voltage, current, installation, structu

FAQ

Q: What are the customizable currents of indoor solid sealed vacuum circuit breaker ?

A:630A/1250A/1600A/2000A/2500A/3150A/4000A

Q: What kind of installation method is there?

A:Withdrawable type/Fixed type/Side mounted type

Q: What shipping methods are available?

A: We offer various shipping methods, including air, sea, truck, and rail.

Q: Do you test your products?

A: Our products undergo rigorous factory testing and are shipped only after passing inspection.

Technical Specification

Number	Parameter name	Unit	Technical Parameters
1	Rated voltage	kV	12
2	Rated short-time frequency withstand voltage (1 min)	kV	42
3	Rated lightning impulse withstand voltage (peak)	kV	75
4	Rated frequency	Hz	50
5	Rated current	A	630/1250/1600/2000/2500/3150/4000
6	Rated short-circuit breaking current	kA	20	25	31.5	40
7	Rated short-time withstand current	kA	20	25	31.5	40
8	Rated short circuit duration	S	4
9	Rated short-circuit closing current	kA	50	63	80	100
10	Rated peak withstand current	kA	50	63	80	100
11	Number of rated short-circuit current starts	times	30	30	30	20
12	Rated individual capacitor bank opening current	A	≤630
13	Rated back-to-back capacitor bank opening current	A	≤400
14	Rated capacitor bank closing inrush current	kA	12.5(frequency≤1000Hz)
15	Closing time	ms	≤80
16	Split time	ms	Maximum Voltage		≤40
		ms	Rated Voltage		≤50
		ms	Minimum Voltage		≤60
17	Time of ignition	ms	≤15
18	Mechanical life (M2)	times	30000
19	Allowable cumulative thickness of dynamic and static contact wear	mm	3
20	Rated closing operating voltage	V	AC/DC 220, AC/DC 110
21	Rated breaking operating voltage	V	AC/DC 220, AC/DC 110
22	Rated operating voltage of energy storage motor	V	AC/DC 220, AC/DC 110
23	Rated power of energy storage motor	W	80 (40KA Motor speed 100W)
24	Energy storage time	s	≤15
25	Contact opening distance	mm	9±1
26	Over traveling distance	mm	3.5±0.5
27	Contact closing bounce time	ms	≤2
28	Three-phase switching and closing non-synchronous	ms	≤2
29	Contact splitting rebound amplitude	mm	≤3
30	Contact closing contact pressure	kA	20	25	31.5	40
30	Contact closing contact pressure	N±8%	2200	2500	3100	4750
31	Average breaking speed (contacts separated by 6mm)	m/s	1.1±0.2
32	Average closing speed (6mm contact closure)	m/s	0.6±0.2
33	Dominant electric circuit resistance	A	630	1250	1600-2000	≥2500
34	Dominant electric circuit resistance	μΩ	≤50	≤45	≤35	≤25
34	Rated operating sequence (1) 20~31.5KA		Minutes - 0.3s - combined minutes - 180s - combined minutes
35	Rated sequence of operation (2) 40KA		Minutes - 0.3s - combined minutes - 180s - combined minutes
35	Secondary circuit frequency withstand voltage (1min)	V	2000