Description
ZN23-40.5 Indoor VCB 33-40.5kV Vacuum Circuit Breaker
General Introduction
ZN23-40.5 series handcart type indoor vacuum circuit breaker for the high life rated 40.5kA, three-phase AC 50Hz indoor high-voltage electrical equipment. Apply to industrial and mining enterprises, substation and transmission and distribution systems for control and protection switching; particularly suitable for metallurgy, electric arc steel-making industries, etc. frequent operation required, as a control and protection equipment.
This product meets the GB 1984-89 “AC High Voltage Circuit Breaker” standard. Circuit breaker directly into the GBC-35, JYN1-35 cabinet, remove the plug can be installed separately
Working Conditions
1. Altitude: ≤1000m;
2. Air temperature: -15°C ~ +40°C;
3. Relative humidity: daily average is not more than 95%, saturated vapor pressure daily average is not more than 1.8kPa.
4. Earthquake intensity: not more than 8.
5. Installation places: No fire, explosion hazard, serious filthy places.
6. In the second system, the amplitude of induced electromagnetic interference does not exceed 1.6kv
7. Power condition: DC 110V, 220V; AC 110V, 220V
Technical Specification
| No | Item | Units | Technical parameters | |
| 1 | Rated voltage | kV | 40.5 | |
| 2 | Thunder impulse withstand voltage(peak value) | kV | 185 | |
| 3 | lmin industrial frequency withstand voltage | kV | 95 | |
| 4 | Rated frequency | Hz | 50 | |
| 5 | Rated current | A | 1250,1600,2000 | |
| 6 | Rated short-circuit break current | kA | 25 | 31.5 |
| 7 | Rated peak value withstand current | kA | 25 | 31.5 |
| 8 | Rated peak value withstand current | KA | 63 | 80 |
| 9 | Rated short-circuit duration time | s | 4 | |
| 10 | Rated short circuit breaking time | ms | ||
| 11 | Rated short circuit closing current | kA | 80 | |
| 12 | Rated operation order | 0-0.3s-C0-180s-C0 | ||
| 13 | Time of closing brake | ms | 50~85 | |
| 14 | Time of breaking brake | ms | 40~85 | |
| 15 | Rated short-circuit current break and close times | Times | 20 | |
| 16 | Mechanical life-span | Times | 10000 | |
| 17 | Rated dropout current of condenser bank | A | 630 | |
| 18 | Rated power of energy-storage electric machine | W | 275 | |
| 19 | Rated volt of energy-storage motor | V | 25 ± 2 | |
| 20 | Storage time | S | ≤15 | |
| 21 | Closing and opening solenoid rated voltage | V | ≈220,110 | |
| 22 | Loss of pressure tripping device rated voltage | V | ≈220,110 | |
| 23 | Over current tripping device rated current | A | 5 | |
| 24 | Auxiliary switch rated voltage current | A | DC10 | |
Outline Drawing 
