YD4G-12 Series Sealed Indoor High Voltage Vacuum Circuit Breaker
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- Product Overview
- The YD4 Type Indoor High-Voltage Vacuum Circuit Breaker, manufactured by Daya Group Co., Ltd., is widely used in indoor armored air-insulated switchgear. It complies with the provisions of standards including GB 1984—2003, DL/T 403—2000, German DIN VDE 0670, IEC 62271-100:2001, and IEC 60694. Under normal service conditions, it can operate safely and reliably in power grids of the corresponding voltage class as long as it is within the technical parameter range of the circuit breaker. The three-phase pole part of the YD4 Indoor High-Voltage Vacuum Circuit Breaker is composed of vacuum interrupters and upper/lower outgoing terminals directly encapsulated in epoxy resin through the Automatic Pressure Gelation (APG) process. The vacuum interrupters are either German Siemens-made or domestically produced. This design reduces the adjustment links of the circuit breaker and the pollution of the interrupter shell by the external environment, thereby improving reliability. The YD4 Vacuum Circuit Breaker has special advantages under working conditions requiring frequent operations or long breaking life. It is equipped with a reclosing function, featuring extremely high operational reliability and service life, and the pole part achieves maintenance-free operation.
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· Meaning of Model Designation
· Service Environment
a) Ambient air temperature: upper limit +40℃, lower limit -15℃;
b) Altitude: ≤100m (if the altitude needs to be increased, the rated insulation level shall be raised accordingly);
c) Seismic intensity: not exceeding Degree 8;
d) Relative humidity of air: daily average ≤95%, monthly average ≤90%;
e) locationss free from fire, explosion hazards, severe pollution, chemical corrosion, and violent vibrations. Similar Products
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