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HV Power Product Range

HV Power supplies proven, advanced products from around the world. Within a supplier's product range, and occasionally between suppliers, there are often different solutions to a problem. We have many years experience in assisting companies find the best products for their particular application. We can tell you what works best, what local technical support is available and how to implement the most cost-effective solution for your application - just give us a call.


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Protection relays

To offer our customers the best product for a specific application, we offer IED's from Siemens (SIPROTEC and REYROLLE brands) and RMS:

  • The SIPROTEC range offers advanced multifunction numerical protection relays with advanced communications (IEC 61850 ,but also DNP3). These products are ideal for generation, transmission and distribution applications.
  • The REYROLLE range also offers multifunction numerical protection relays, but with support for IEC 103 and DNP3 protocols. REYROLLE products are generally suited to smaller distribution (lines) companies and industrial applications.
  • RMS Mors Smitt offers a wide range of discrete Auxiliary relays, arc fault monitoring and pilot wire supervision products.
Overcurrent protection
Distance protection
Line differential protection
Transformer differential protection
Busbar differential protection
Capacitor bank protection
Generator protection
Motor protection
Auxiliary, tripping, trip circuit supervision relays
Arc fault monitors

Find out more about protection relays


Transformer tap change controller and temperature controls

We recommend the REG-D and REG-DA series of voltage regulators for the control of transformer tap changers. They are New Zealand's most popular voltage regulators, and are in use on all major NZ utility networks. While there are other solutions, REG-D/DA is the benchmark in reliability and performance.

Our regulators support simple voltage regulation - on single transformer applications through to the complex control of multiple parallel transformers. Temperature controls can be integrated into the REG-D and REG-DA regulators when you specify the TMM option.

Find out more about transformer voltage regulators and temperature controls


LV Regulators

LVRSys is a low voltage regulation system that can be used on all (230/400 V) low voltage distribution networks where voltage problems exist. With the proliferation of domestic solar generation and electric vehicle charging, there is a growing need for additional voltage regulation within these networks. The LVRSys product gives network planners a convenient solution that can be retrofitted to the distribution network to automatically regulate and monitor under or over-voltage conditions

Find out more about LV Regulators


Transformer condition monitoring

Transformers are the most cost-intensive single component asset in power transmission and distribution and should therefore be supervised with special care. Analysis of the moisture and gases dissolved in transformer oil is recognised as the most useful tool for early detection and diagnosis of incipient faults in transformers. The cost-effectiveness of online dissolved gas analysis (DGA) is well known. HV Power represent (in New Zealand and Australia) MTE’s range of HYDROCAL brand: maintenance-free online DGA and moisture in-oil detection solutions.

Find out more about HYDROCAL


Fault passage indicators

Alpha, Opto, Sigma and ComPass are well known short circuit/earth fault indicating devices installed in Ring Main Units and MV switchboards. The range of solutions cover simple visual indicators to smart grid reporting devices. Cable and panel mounted products are available.

For Overhead applications, the NAVIGATOR series offers long life and high reliability visual fault passage indication. The SMART NAVIGATOR series can also be coupled with radio/GSM communications, to report back to SCADA. Not only can fault event data be reported, but also data logging of line load current, temperature, conductor temperature and other information highly valuable to network operations. The NAVIGATOR series are proven to reduce network downtime, by allowing lines staff to quickly locate the faulted line section. High sensitivity products are now available specificaly for use on SWER lines.

As part of our RE+DS (“Resonant Earthing + Earth-fault Detection Systems”) solution, Earth-fault detection and location solutions are offered - specific for use on such compensated power systems. Refe to the following Resonant Earthing section for further details.

Find out more about fault passage indicators


Resonant earthing

In New Zealand and Australia, there is an increasing demand to reduce the number of supply interruptions experienced by consumers. For Network owners there is also a statutory requirement to meet minimum SAIDI and CAIDI standards. One way of substantially improving these is to be able to operate the network safely and in continued operation in the presence of earth faults.

Resonant Earthing solutions are now engineered and delivered as complete systems for New Zealand and Australian utilities by HV Power. Utilising products from A.Eberle and EGE, a Petersen coil is connected between the neutral point of the supply transformer and earth. This is controlled by the REG-DP/DPA controller which tunes the coil to match the system capacitance, thus compensating the fault current. Each feeder circuit is monitored by an EOR-D relay which detects earth- faults on the system and provides feedback via through SCADA interface to the network control centre.

Marketed under the name RE+DS (“Resonant Earthing + Earth-fault Detection Systems”), the individual components are also available for separate applications, such as Earth-fault detection and location on non RE+DS systems. See our range of Horstmann products in our Fault Current Indication section for non-compensated power system applications.

Find out more about resonant earthing & earth fault detection


Power quality instruments and revenue metering

Power quality field tools
We recommend and supply the PQ-Box 100 & PQ-Box 200 for portable field power/power- quality measurements. Highly robust, highly accurate and fully featured these devices are a must have for any utility customer. A great tool for network performance engineers, quality engineers, metering and commissioning staff. Simple to use, yet offering hundreds of different measurement, the PQ-Box will satisfy many needs within your company.

Power quality- permanently installed
The PQI-D and PQI-DA are our recommendation for permanently installed power quality monitoring devices, and can be used to monitor a single network point, or for complete network monitoring using distributed monitors. The PQI-D/DA also provide fault recorder functions, monitoring of power, energy, harmonics and network parameters.

The Siemens SIMEAS Q80 is also an ideal permanently installed Power Quality monitoring device, which integrates fully into Siemens SICAM PQS (Power Quality System). The SICAM PQS is database driven and supports the importation of fault records and information from other PQ devices, to provide a comprehensive repository of network power quality.

Note also that our Nexus revenue meters and Shark 200 check meters also feature basic power quality functionality.

Network collapse prediction
For the early detection of blackouts, CPR-D monitors the dynamic behaviour of electricity grids, providing indispensible data for safe grid management.

Revenue & Check metering
Nexus series revenue meters provide advanced highly accurate revenue metering, together with optional power quality monitoring. The Shark series panel meters are a highly versatile meter, offering simple multi-function three phase voltage/current/power metering, though to energy, harmonics and power quality functions with data logging, limit-control, additional I/O and advanced communications options.

Find out more about power quality instruments and revenue metering


Substation automation & telemetry

Substation management systems, bay controllers and data concentrators are offered as part of the Siemens product line. With Siemens leading the industry on implementation of IEC 61850 IED solutions, HV Power have a substantial expertise in the practical implementation of this ground breaking industry technology. HV Power can provide expertise to integrate connectivity of multi-vendor IEC 61850 and legacy protocol equipment.

While we recommend the use of IEC 61850 wherever possible due to its efficiency and power, we are also well versed in the implementation of IEC 103, DNP3 (serial and Ethernet) and web based systems.

We also offer compact, low cost RTU telemetry boxes for the monitoring of network assets that could not be economically justified using traditional SCADA systems.

Find out more about substation automation and telemetry


Time synchronisation

We provide GPS clocks (time code generators) for the synchronisation of IED's using IRIG or NTP connections. We also offer programmable outputs for the synchronisation of equipment requiring one pulse per second (1PPS) or other types. Tekron International are the world leader in timing applications for the substation environment.

We also offer dedicated NTP (Network Time Protocol) servers for the synchronisation of computer network equipment, such as SCADA master stations.

Included in our range of hardened Ethernet devices are router-terminal servers with IRIG-B support and managed Ethernet switches with PTP IEEE 1588 V2 support.

Find out more about time synchronisation


MV switchgear

HV Power represents quality Siemens MV switchgear in New Zealand. Our team has experienced project management staff, commissioning engineers, protection engineers and factory trained staff to ensure our customers get the best solution.

We offer products for transmission and distribution applications, including indoor and outdoor switchgear and line regulators.

Find out more about our range of MV Switchgear


Hardened Ethernet

We offer industrial networking solutions for the factory automation, power utility, telecommunications and temperature-uncontrolled, outdoor locations. Electrically hardened and offering extended temperature ranges, these products are suitable for network-critical applications.

We offer the latest in support of various optical fibre circuits, 10baseT, 100baseT and Gigabit circuits (fibre and copper). Power-over-Ethernet (POE), DNP, DNPi, IEC 61850 and many other protocols are supported.

Many of our customers are electrical utilities, wanting to automate, simplify and make more reliable their IED/SCADA network. While they want to take advantage of new features such as IED's with built-in web pages etc, they do not want to become experts in network topology and protocols. Give us a call and we can help with:

  • Managed Ethernet switches
  • Unmanaged Ethernet switches/hubs
  • Routers
  • Serial communications (Device servers, Terminal servers etc)
  • Media converters
  • Cyber security

Find out more about hardened Ethernet


Other products

We offer a wide range of solutions including: