With the development of the society, people has higher requirement on the power supply reliability. Many occasions to ensure the reliability of power supply with two way power supply, which requires a product in reliable switching between two power supplies, our company produces the intelligent dual power automatic switching device is mainly composed of two sets of circuit breaker and a dual power supply capacity for self controller in two parts. Applied to ac 50HZ, rated voltage of 12 KV, rated current 1250A dual power supply system, when the power failure or under voltage occurred in power source automatic switch all the way to the other along the normal power supply, reliable guarantee for the continuity of power supply
The controller has a short circuit, a three-stage over-current, single phase grounding, under voltage, reclosing and prepaid and various protective functions, effectively avoid the unnecessary power supply shock again when load failure. In common power failure occurs, switching device can complete with standby power automatic switch, to ensure the reliability and security. Particularly applicable to not allow the important place of power, as an important electrical control device to ensure continuous power supply, is with circuit breaker of the replica dual power automatic switch device. Products are widely used in oil fields, mines, 10 KV distribution line,industrial and mining enterprises, 10 KV line, ensure that important real-time power supply load, less space, small investment, debugging, maintenance is convenient wait for a characteristic, is the realization of the ideal switch of the power supply
automation equipment.
The controller is an automatic management unit for single way/multi ways/ring network/two power sourcing, provided with all voltage and current signals and all
functions.
RWD-LC column switch intelligent controller supports:
Wireless (GSM/GPRS/CDMA), Ethernet mode, WIFI, optical fiber, power line carrier, RS232/485, RJ45 and other forms of communication, and can access other station premises equipment (such as TTU, FTU, DTU, etc.).
Protection
49 Thermal Overload (Over load)
50 Instantaneous Overcurrent (Ph.OC)
50G/N/SEF Instantaneous Sensitive Earth Fault (SEF)
27/59 Under/Over Voltage (Ph.OV/Ph.UV)
51c Cold load pickup (Cold load)
Supervision
60CTS CT Supervision
60VTS VT Supervision
Control
79 Auto Reclose
86 Lockout
CB Control
Phase Current Inputs:
Quantity 6
Rated Current In 5A
Measuring Range 20 x In
Instrumentation≥ 0.1xIn ±1% In
Frequency 50Hz
Thermal Withstand:
Continuous 2 x In
10 Second 10 x In
1 Second 40 x In
Burden @ In ≤0.2VA (5A Phase element)
Sensitive Earth Current Inputs:
Quantity 2
Rated Current In 5A
Measuring Range 2 x In
Instrumentation≥ 0.1xIn ±1% In
Frequency 50/60Hz
Thermal Withstand:
Continuous 2 x In
10 Second 10 x In
1 Second 40 x In
Burden @ In ≤0.02VA (1A Earth element)
Voltage Inputs:
Quantity 2 PT voltage
Nominal 40…120 Vrms
Operating Range 0...200 Vrms9
Instrumentation≥0.8xVn ±1% Vn
Burden @ 110V 0.06 VA
Overvoltage Withstand 240 Vrms
Auxiliary Supply:
DC Voltage 220V
Range 165 to 365V
AC Voltage 220 V AC 50Hz
Range 165 to 265Vrms AC
50/60Hz ±5%
Power consumption ≤10W
Binary Inputs:
Number 6
Operating Voltage 24V DC
Maximum dc current for operation 2mA
Binary Outputs:
Number 4
Operating Voltage 220V DC
Operating Mode User selectable - Self or
Hand/Electrical Reset or pulsed
Operating Time from Energizing Binary Input <20ms
