Power Automation Pte Ltd

BU - Basic Unit

Central Control:
The head-end forms the central unit - it controls the flow of information both towards the control centre and towards the remote stations. And by parameterizing of the master function, the head-end is also assigned the function of controlling and monitoring the entire line.

Interference Eliminated:
The transmission of information in medium -voltage systems is always prone to interference. This is a problem that DCS 3000 solved long ago - with a special OFDM transmission system. By virtue of a number of parallel carriers, it is possible to transmit reliably, despite interference. An additional error correction (Forward Error Correction, FEC) eliminates any bit errors, which may still be present.

Overview / Benefits Siemens offers two main applications for DCS3000 : - Automation of the medium-voltage power network - Meter reading Numerous advantages are combined in a single system with DCS3000: - different applications (eg. Meter reading) - optimum utilization of power utility's own resources - improved total network service quality - cost-effective solution More and more, procurement decisions are driven by financial aspects. DCS 3000 is outstanding in terms of life-cycle costs. A slightly higher initial investment in the equipment (compared to low-cost solutions such as GSM modems) will be over-compensated by minimal running costs. Moreover, DCS 3000 makes use of the utility's own power network to transmit data, yielding - very high availability - short response time - total independency - from construction in surrounding, - from radio licences, - from network providers (internal, external)
	BU - Basic Unit Central Control: The head-end forms the central unit - it controls the flow of information both towards the control centre and towards the remote stations. And by parameterizing of the master function, the head-end is also assigned the function of controlling and monitoring the entire line. Interference Eliminated: The transmission of information in medium -voltage systems is always prone to interference. This is a problem that DCS 3000 solved long ago - with a special OFDM transmission system. By virtue of a number of parallel carriers, it is possible to transmit reliably, despite interference. An additional error correction (Forward Error Correction, FEC) eliminates any bit errors, which may still be present.
	DCS 3000 Coupling Devices - Principles The utility's own network resources, the medium voltage network with nominal voltages of 6 kV to 24 kV , are used as a transmission medium. The requirements in relation to coupling options for the medium voltage level vary, depending on the type of power distribution network (cable or overhead lines) and must take account of both the technical environmental conditions and cost-effectiveness. Siemens offers two alternatives for this: inductive and capacitive coupling devices. The coupling device used depends on the type of power distribution network: Patented safety - coupling device capacitive (CDC) for ground-sensitive or buried cables and overhead lines. The communication path comprises the cable conductor and ground. Impressively simple - coupling device inductive (CDI) for non-ground-sensitive cables. The communication path comprises the cable shield and ground. Capacitive Coupling: Depending on the voltage level and whether the system is to be used indoors or outdoors, Siemens can provide a tailor -made capacitive communication solution:
		Product Name	Voltage Level
	Indoor	CDC 6	up to 6kV
		CDC 12	up to 12kV
		CDC 24	up to 24kV

	Outdoor	CDC 24F	up to 24kV


	Inductive Coupling: The CDI can be mounted throughout the whole cable. In case of single cables, every earth strap is passed through the CDI. The CDC can be mounted close to the earthing bar of the switch gear or pole top on the cross arm. Assembly must be carried out according regional standards.