ABB Solutions for Photovoltaic Protection and other Modular Devices
- Published: Friday, 30 September 2011 20:56
For the photovoltaic market, ABB supplies a comprehensive range of high technology products for virtually every residential, commercial and power plant application to grant its customers access to renewable sources of energy.
Devices for photovoltaic applications:
Miniature circuit breakers (MCBs)
MCBs protect installations and devices from overload and short circuit. On the DC side of a PV system they are responsible for reverse current protection from intact strings to defective strings and also protect against feeding of AC current in the event of inverter failure. All solar panel strings need to be individually protected.
This then ensures that only the effected circuit is switched off in the event of any faults. The remaining strings will continue to supply power. If the MCB has tripped, it can simply be switched back on after eliminating the fault. The ease with which a part of the equipment can be switched off for maintenance procedures or extension of the system also increases the availability of the equipment significantly.
Surge protection devices (SPDs)
Cells and inverters are very sensitive to overvoltage and impulse currents, such as switching and lightning surges. The ABB surge arrester range for special DC limits the overvoltage to an acceptable level for the equipment to be protected and prevent damage to installations. Therefore, the risk of financial losses should be taken into account when considering an investment in solar panels. One of the benefits of using SPDs is a better return on investment.
DC switch disconnectors are used for safe switching under load and have the required disconnector characteristics up to 1200 VDC as per IEC 60364-7-712 for PV installations. The simple handling of the devices enables easy implementation of routine maintenanceand extension work. This also increases equipment availability and is an excellent investment in your PV system.
AC isolators are used for safe switching under load and for safe disconnection. The simple handling of the devices enables easy implementation of routine maintenance and extension work within the AC installation
Residual current devices (RCDs)
It is absolutely essential to protect people and installations from fault current to earth and the risk of fire. The type B ABB RCD range provides this protection with extremely fast reaction times as per IEC 62423.
Compact meters measure the electrical energy produced in a photovoltaic installation. ABB meters can be fitted with DIN rails and be easily integrated into measured data collection systems via serial communication adapters. Meters are approved according to the Measuring Instruments Directive (MID), European Directive 2004/22/EC and IEC.
Enclosures can be used as combiners (DC side) and distribution boards (AC side). Thanks to their high protection class, they are ideally suited for outdoor installation. ABB supply a wide and versatile range of boxes with screwed and hinged covers. Devices can be fitted with DIN rail or mounting plate.
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