GIS LOCAL CONTROL PANEL
Product Overview
Followed from a development of the industry, power consumption has been increased and led a large capacity and extra-high voltage of power systems.
Thus stability and credibility of electric power facility is very important issue. Due to difficulty in procurement of an industrial site for power generation plants, excessive amount of expenditure in maintenance, safety issue, trends in making extra-high voltage electric power facility has been changed. Main circuit system for power supply has been concealed and enclosed while a control system has been changed to a electronic digital type. Also in issue regard to insulation, previous air or oil insulated substation facility has been changed to a gas insulated substation facility.
GIS (Gas Insulated Switchgear) GIS is concealed facility that has switching facility such as circuit breakers, disconnection switch and transformers, arresters and busbar etc, in metal tanks. Its charging part is supported by a Spacer. And an inside of tank is filled with SF6gaswhichhasexcellentinsulating andarc-suppressingperformance.
GIS SYSTEM CONFIGURATION
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Circuit Breaker
A type of switchgear, it could open and close not only a normal load operation but also a faulty system. Moreover, a circuit breaker could open both normal load current, and fault current.
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Disconnection switch
It is a switchgear device used when circuit transition, sectionalizing, disconnecting no-load devices from circuits. Therefore it always performs its operation in no-load status.
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Earthing Switchgear
Earthing on GIS is impossible since it is concealed by metals. Thus earthing switchgear is installed for earthing circuits after an outage.
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Local Control Panel
It is an installed panel for control/monitor of GIS’main devices such as circuit breakers, disconnection switches, and earthing switchgear. Also it includes an interlock circuit for prevention of disoperation when controlling those devices.
LCP MAIN FUNCTIONS
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1. Control of switchgear (Circuit breaker, disconnection switch, earthing switch)
2. Monitoring status of switchgear and its damping gas, etc.
3. Interlock circuit for prevention of disoperation.
4. Interface between protection panel and GIS main devices.
WHAT IS AN INTERLOCK?
It is a circuit for a protection of facilities and a safety of operator. By using a contact for device status, it checks and locks activation of facilities related to each other.
TECHNICAL SPECIFICATION/STANDARD
| Index | Item | Specification | Remarks |
|---|---|---|---|
| Rating | Controlled Power | DC : 110V or 125V or 220V | Selectable |
| AC : 120V or 220V | |||
| Current | 1 or 5A | Selectable | |
| Voltage | AC63.5V or 66.4V or 110V or Higher | Selectable | |
| Environment | Allowed Tempearture | -25˚ ~ 40˚C | Selectable |
| structure | Allowed Location | Indoor or Outdoor type | Selectable |