POWER & UTILITIES
The function of a DC System in a substation is to provide a reliable source of power for protection and control and monitoring functions at the station. Switching breakers is the first thing that comes to mind when some one says DC POWER SYSTEM in power utilities as the major loads connected to the DC system are the trip and close coils of circuit breakers.
There are some other typical loads that are also important when you are sizing your battery charger or DC UPS, such as feeder terminals, power supplies of electronic relay protection units, telecontrol systems, automation and signalling units, SCADA system , measurement and monitoring units, power transformers cooling fans , emergency lighting and communication equipment.
There are many considerations when designing a substation, but the main ones are: Space , Controllability , Selectivity , Accessibility , Maintainability and Reliability. Therefore any component in the substation should be selected with those features in mind.
Helios Power Solutions has Communication enabled DC and AC systems such as THE SOL SERIES and Riello UPS, an extensive range of batteries suitable for unstable and stable mains, battery monitoring and maintenance service, and substation earthing/grounding surge and lightning protection systems.
These are just some of the products that are available in our comprehensive range of products and systems capable of meeting any kind of configuration required by the overall power system.
Why Helios Power Solutions?
Our design and sales department work together with consultants, electrical contractors and end-customers to provide a turnkey solution which will not only meet the immediate requirements but also future requirements.
All of our custom build systems are fully assembled in our factory by experienced manufacturing personnel enabling us to have 100% control over the final product.
Customer’s feedback, especially from the maintenance and engineering department has enriched our knowledge and improved significantly our designs and procedures over the years thus allowing us to address concerns such as poor retrofit installation, scalability, time-consuming maintenance and space-restrictions.
As a result, Helios Power Solutions has consolidated its name in the Australasian region as one of the main engineering providers of Industrial DC Power and Backup Systems.We invite you to check out some of the Battery Charger Systems designed and integrate by HPS.
Modular & Redundant Battery Chargers For Six Electrical Substations In Bangladesh
At Helios, we had the opportunity to design, manufacture and test 6 Convection cooled & Modular 1+1 Redundancy 48V 50A Battery Chargers Systems which will be baking up the SCADA/EMS & Telecom NMS of the power Grid company of Bangladesh. Keep watching the video and find out our integrated and customizable DC Systems Solutions.
Switching Breakers in Medium Voltage Substations
The Sol Series Battery Charger system is an optimal solution for Power Utilities when the requirement is the protection of electrical substations.
The trip and close coils of circuit breakers in medium and high voltage substation are the main application of DC POWER SYSTEMS in electrical power utilities.
CAB733 is a 2.2kW 110VDC convection cooled float charger in a 12U 19” Wall Mount cabinet. The system comprises of a CXC HP controller, HV-ADIO unit, two 1.1kW 125VDC rectifiers in a SOL series 6U 19” rectifier rack with AC distribution and a 3U 19” DC distribution panel. Two CAN cables connect the controller to the rectifier rack and the rectifier rack to the HV-ADIO on a CAN communication bus.
- 2kW 110 VDC float Charger
- Two 1.1kW Hot Swappable rectifiers
- Fully programmable touch screen controller
- 12U 19” Wall Mount Cabinet
- Single Phase 230VAC input protected by surge protection monitored by the system
- 32A 2 pole Battery Breaker monitored by the system
- 32A DC Output Breaker monitored by the system
- DC High, Battery Low, AC Mains High/Low, Rectifier Fail, System Major Earth Fault and Controller Fail Programmable alarms on voltage free relay contacts
The dual voltage CAB907 is able to supply 110VDC and 24VDC output voltage in a 21U cabinet. This customized DC System was designed to power and backup the DC Auxiliary loads of a 110kV/33kV transmission substation of one of the electricity and generation companies in New Zealand.
This charging system comprises of 110V and a 24V charger each with its own controller and rectifier sub-rack configured for redundancy with CSB409 load output diodes and separate battery racks. Read Case Study HERE
- 21U wall mount cabinet
- Two 3 Phase Mains Input
- Chargers configured for redundancy with output diodes
- 230VAC Cabinet Fan
- Remote monitoring and programming with a webpage interface
- SNMP v2.5 via Ethernet
- Email reporting
New Zealand Windfarms Project
Power generation plants, electrical substations, power transmission and distribution systems require lighting protection systems, grounding and bonding to protect their electronic equipment and people from lightning strikes, switching and other external factors. Helios is the engineering partner of nVent in New Zealand and our experts with more than 20 years of experience in Power Protection Systems are ready to help you to design Safe and Compliant Lightning and Surge Protection Systems.
As a technical consultant, engineering contractor or even end-user, it is always your responsibility to provide solutions that comply with the latest Electrical and Communications standards along with delivering reliable and sustainable solutions. With our knowledge and experience, we can provide guidance in designing lightning protection systems to meet New Zealand or international lightning protection standard requirements. Contact our expert Richard Walker for further information.
Recommended Products for Power Utility Applications
Direct and indirect lightning strikes can pose many risks to businesses, including damaging buildings and critical equipment. nVent ERICO lightning protection products offer a variety of solutions to help protect valuable equipment and personnel and to help prevent service disruption and downtime.
Helios provides a high level of application engineering and design assistance to the users of its products. This team carries out modelling of a lightning protection system using modern software tools that use complex algorithms to model lightning strikes in a more accurate way than traditional methods.
Lightning Protection Products
The grounding of facilities associated with the distribution of power is sometimes not given the same level of thought and design scrutiny as is given to the substations. nVent has a complete range of products that address this need. Helios Power Solutions is nVent distribution partner in New Zealand.
Grounding connections are vital to the proper operation and integrity of the electrical system. nVent offers a range of mechanical connections, including clamps, jumpers, fence connections, U-Bolts and other clamps. nVent recommends the Cadweld welded electrical connection for making these connections. The principle technology consists of bringing together a welding material and ignition agent in a graphite mold. The reduction of copper oxide by aluminum produces molten copper and aluminum oxide slag at extremely high temperatures. The shape of the mold, its dimensions and the size of welding material are all dependent on the items to be welded. This results in a molecular bond that exceeds the life of the conductor.
Ground Enhancement Material (GEM)
GEM is a superior conductive material that improves grounding effectiveness, especially in areas of poor conductivity (rocky ground, areas of moisture variation, sandy soils). GEM can dramatically lower earth resistance and impedance measures. Typically, it has resistivity in a range from 12-18 Ohm cms (20 times lower than bentonite clay). Once in its set form, it maintains constant resistance for the life of the system.
GEM performs in all soil conditions, even during dry spells and it does not dissolve, decompose or leach out with time.
Theft Deterrent Cables
nVent offers several solutions for areas where traditional copper cables are prone to theft. Theft-deterrent composite cable is a bare concentric stranded conductor that consists of peripheral galvanized steel stranding, which protects and conceals the internal copper strands. This conductor is ideal for exposed electrical distribution grounding leads where copper theft may occur. The conductor is difficult to cut with hand tools, and the outer steel stranding is magnetic, which further deters thieves looking for copper. nVent has a range of copper-coated steel conductors that are also used for this application. Copper-coated steel conductors can either take the form of a traditional cable with stranding or they can be preformed ground rods that have a hardened steel centre. These preformed rods can connect directly to steel structure being earthed with no need for copper cables. Cadweld is the most suitable connection method for all these specialized conductors.
Surge protection products are designed to help protect against damaging electrical surges on power and communications lines caused by lightning and other switching events. With the increasing focus on system reliability and the Smart Grid initiatives underway in many countries, surge protection is more critical than ever based on the amount of electronics control and monitoring systems on the power grid today.
SURGE PROTECTION FOR TRANSMISSION AND DISTRIBUTION
Electronic equipment operating at remote system monitoring locations on distribution lines are susceptible to ground potential rises and induced or direct lightning impulses on the network. Surge protection is an extremely cost-effective investment for such equipment as this equipment is most needed during times of local storm activity. Therefore, protection that is robust against high-level surge activity, and protection that is immune to voltage fluctuation on the network is critical.
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