Our No-Break ™ DC chargers have been designed for industrial use and have over twenty years of proven reliable operations. In addition, the chargers have many outstanding features such as fault alarms, LED fault alarm codes, battery detection, low voltage disconnect circuitry, automatic battery condition testing, communication options and can be connected to the battery permanently due to the precise temperature compensated voltage control.
No, the metal case of the power supply should be connected to a secure earth as this ensures compliance with safety and EMC standards. The DC output may be left floating depending on the system requirements.
It depends on the current rating of the power supply. Stud connectors provide a more secure connection for higher currents and are generally used when the rating exceeds 20A per screw terminal on Helios Power Solutions power supplies.
The No-Break ™ DC UPS has many features which a normal float charger does not, these including:
Normally it is not necessary to have a boost on the No-Break ™ unit, as the power is on the system continuously and it is not that critical to restore 100% of charge rapidly, as in the case of cyclic applications. A boost charge voltage may damage the equipment which is permanently connected to a standby system.
At approximately 1.67 volts per 2V (nominal) cell, so for a 12V system the disconnect voltage is set at 10V.
This is done to implement two of the features of the No-Break ™ UPS/charger. There is an “electronic circuit breaker” fitted between the battery negative and load negative terminals to provide the battery overcurrent protection. The separate battery circuit also allows for independent control of the charging current when required.
All electrical equipment produces waste heat during operation due to internal losses. This heat must be removed or the equipment will overheat and subsequently fail. With low power equipment heat sinking and normal convection are adequate to dissipate this heat but with higher power equipment the most cost effective method for removing heat is by using a fan.
No, it would nullify all the features of using the No-Break ™DC design and provide false alarm signals from the relays. If you wanted to do this, then it is advisable to use a standard two terminal float charger, with or without alarms.
No, the No-Break ™DC UPS is designed to operate with a battery connected and instability may result if there is no battery connected. If you wanted to do this then it is advisable to use a standard two terminal DC power supply.
Switchmode power supplies is much lighter and more compact, whilst Linear technology has been designed around using a 50Hz transformer and a regulation system, based on wasting energy in order to maintain output voltage regulation. The SMPS is very efficient and wastes very little energy.
There will be no problem with VHF and UHF radios. Switchmode is not recommended for HF radios (20 – 30MHz, old citizen Band).
The Helios Power Solutions Smartchargers senses the charging current into the battery and when it reaches a pre-determined level it enters the “float” mode. Low cost chargers usually remain in boost mode for a preset time so a fully charged battery may be overcharged if connected to one of this type.
Yes, it is not necessary to use the centre terminal.
Many Helios Power Solutions power supplies do not actually have equivalents due to their custom design. Many of the cheaper alternatives can not be serviced or repaired and most must simply be replaced by another low cost device and the failed unit disposed of, which is to the detriment of the planet.
Yes, for more information please call the sales team on +64 9 835 0700.
Conformal coating will offer some degree of protection from moisture. Direct contact with water or other fluids should always be avoided.
It is a type of plug-in connector with screw terminals, made by Phoenix and other manufacturers. We use the one rated at 20A per terminal on our SR range, except where higher currents dictate the use of stud connectors.
Temperature compensated charging ensures that batteries are charged to maximum capacity in cool environments and protected from overcharging in warm environments. Temperature compensation should always be used when the batteries are going to be exposed to cold, hot or fluctuating temperatures.
The SR range (except SR100) comes complete with removable mounting feet, which allow for a variety of mounting positions. All our products may be fitted into our optional 19″ (euro) sub-racks.
We have a line of credit application form available on our website. Our terms and conditions require payment in full by the 20th of the month and also include a cash on delivery account (full payment prior to delivery).
Ph: +64 9 835 0705
All of the above methods of payment are accepted, with the exception of some credit cards (eg. American Express)
Yes, our service manager will be happy to inspect the unit and get back to you with the possible fault, estimate charge and whether it is best to repair the unit.
Send the unit to us noting this number on the package and on any other documentation you may have. We have a returns form posted on the website ‘RMA form’ which can be completed and returned with the product. Please include all your company and contact details so that we are able to contact you if needed.
We manufacture two designs of meters; one using a ‘Hall effect’ current transformer to convert the current to a voltage signal, and one which utilises a current shunt. The ‘Hall effect’ transducers have an inherent problem in that they tend to retain some residual magnetism after a large current has passed through them. It is this residual magnetism which causes the false readings. The shunt versions have a much reduced zero point offset.
The two readings are obtained via different transducers and microprocessors. The SNMP reading is obtained from an internal shunt , transducer and A/D converter in the power supply while the LCD meter has its own transducer, etc. Each one of these components has a margin of error and sometimes the cumulative errors are at the opposite variance to each other.
There are many aspects which affect the choice of module. Totally single phase units are rarely available beyond 20 kVA, above this size it is usually necessary to use a three phase input for the rectifier, even where the inverter output is single phase. When feeding this type of system via a generator it is important to remember that the bypass line will be single phase, demanding a higher current on one phase only. Larger units with three phase input/output are more easily distributed across generators and can also be used to feed single phase loads, and with good load balancing, need not be oversized.
End of discharge voltage is the level to which the battery string voltage or cell voltage is allowed to fall to before affecting the load i.e. 1.75V or 21V a an nomial 24V system.
As previously detailed, the energy stored within a battery cell is the result of an electrochemical reaction, so any change in the electrolyte temperature has an effect on the rate of reaction provided all other factors (charge voltage and current) relating to the reaction remain constant.
The simplest way of maintaining the rate of reaction within design parameters is to alter the charge voltage at a rate proportional to the change in temperature, i.e. decrease the charge voltage with an increase in temperature above 20-25°C and increase the charge voltage with a decrease in temperature below 20-25°C. The typical change in charge voltage is 3 mV / °C. Contact our engineers for further information, our battery chargers have temperature compensation options.
Charge given to a battery to correct voltage imbalance between individual cells and to restore the battery to fully charged state.