Ⅰ. Introduction to OM303 Epoxy Bushing for RMU
OM303 epoxy bushing is used in air insulated environmental protectioncabinet, it has enough air insulation distance, can support and fixcables and copper row, rated current can do 630A 1250A, voltage levelcan be used for 12kV, the material of high quality epoxy resin andcopper, using no local release induction network, can shieldgrounding or connected to live display.
Ⅱ. Features of OM303 Epoxy Bushing for RMU
1. Great Muscle Strength
The shell of epoxy resin has great mechanical strength. It can take up the huge electrodynamic forces that are created not only during regular operations but also during short circuit currents without getting deformed or damaged. It has excellent crack resistance and dimensional stability, hence reliability when there is variation in temperature as well as long mechanical stressing.
2. Extreme Environmental Conditions
The bushing body material shows great weather resistance, moisture resistance, salt spray resistance as well as UV resistance suitable for high temperature and humidity outdoor environments. Highly hydrophobic surface reduces attraction of contamination hence maintaining high level of insulation even in highly polluted areas, and greatly improving the equipment maintenance-free operation.
3. Optimized Interface Design
The bushing interface has been specially designed for easy connection of cable T-type connectors (elbow plugs). It contains built-in conductive contacts that have low contact resistance and offer a stable connection. Insertion/extraction force is accurately determined so as to get a secure fit but at the same time allowing safe live insertion/removal with the help of tools when needed.
4. Long Service Life and High Reliability
All materials are selected and tested by aging tests, with the design life of the product equal to that of the whole ring main unit. It does not need any extra maintenance while operating in rated conditions, which significantly reduces the total lifecycle operating cost for users.
Ⅲ.Electrical Performance Parameters OM303 Epoxy Bushing for RMU
NKS-EB-12/1250- | Description | 1# OM 303 Epoxy Bushing | 2# OM 303 Epoxy Bushing |
| Technical Parameters | System Voltage | 12kV |
Rated current | 630A | 1250A |
Frequency withstand voltage(AC) | 42kV/1min |
Partial Discharge | 15kV＜5pC |
Impulse voltage | 95kV ±10times |
Capacitance value
| 18±3PF
| 18±3PF |
| Size of the conductive rod |
| A | Φ30 | Φ30 |
| B | Φ30 | Φ30 |
| Remarks | The middle diameter of the conductive rod is less than 30mm |
|
The product has passed the inspection and certification of the China Electric Power Research Institute (CEPRI) Power Industry Electrical Equipment Quality Inspection and Testing Center
Type test reference standard: IEC 60502-4:2010 GB/T 12706.4-2008
