ASS (Auto Section Switch)
ASS is a line protection switch that minimizes blackout damage caused by malfunction. It cooperates with the backup protective device and blocks the fault section automatically. It is installed on the customer's faucet penetration point in which the load capacity of the substation CB or recloser is below 4,000kVA (special load 2,000kVA) on a 22.9kV-y distribution line.
Internal power charging system
This function supplies an internal battery charging power on a 22900V line. There is no need to apply a separate AC 220V control power when installing the product.
Overcurrent is blocked according to a VI characteristic curve that is maintained for 3 seconds at 1.5 times the minimum operating current correction value.
Momentary operation of the backup protection device enables an automatic trip while the fault current is removed (Does not open when ASS is in normal operation).
Inrush Current Restraint
Prevents malfunction by restraining the inrush current from the transformer or motor.
The switch locks when abnormal rating lock current (800A) occurs. This function automatically separates the fault section by opening the ASS after blocking the backup protection device.
Rated voltage: 25.8kV
Rated frequency : 60Hz
Rated current : 200A
Rated short-time current : 15kA Instantaneous Asym, 10kA 1s Sym, 3.5kA 10s Sym
Minimum operation current:
.Ground 2.5,5,10,15,25,35,50,70,100A, BY-PASS
Rated breaking current : 900A
Rated closing current : 15kA Asym
Rated current : 60kV/1min
Impulse withstand voltage : 150kV(1.2X50㎲)
Inrush current restraint time : 0.5, 1.0 sec
Rated control voltage : DC24V(Self Charing)