AMF controllers tutorial page
What is an AMF Controller? AMF controller means Automatic Mains Failure controller. This kind of controller is used in generator control panel when you have to control a generator that is connected in standby configuration. It is about a system that is waiting for a failure of the power utility.
A panel fitted with an AMF controller automatically controls the connection assignment of the LOAD to POWER UTILITY or GENERATOR. The generator control panel avoids back-feeding by using mechanical and electrical interlock. In other words, inside the panel there are two contactors that connect the load to power utility or generator. It is not allowed the connection GENERATOR-POWER UTILITY.
The panel includes the AMF controller and contactors and additionally includes the automatic battery charger and a set of electronic circuit boards complete with power relays. The AMF controllers interfaces with the engine by means of relays. The AMF controller is conveniently tasked with driving the contactors via driving relays as well.
In this page you can select the AMF controllers that fits your application. Some technical details about AMF controllers are explained to help you in choosing the proper product. A link to the product is provided for each item.
BeK3 & BeK3-zero AMF controllers
These AMF controllers are suitable for making AMF panels for industrial applications. The controllers allow setting up 3-phase Mains & Generator adjustable relays. You can monitor the earth fault current as well. The BeK3 AMF controllers in addition to the standard functions included in generator control systems feature a CANBUS & MODBUS serial interfaces. This will allow you connecting the most popular ECU available on the market. In case your engine is without 'ECU', you can connect to the BeK3 analog sensor to get a supreme protection ot the engine or you can use the cost effective BeK3-zero module. Expected life of the controller is about 20 years at ominal temperature of about 20 deg. Celsius. READ MORE ABOUT BEK3 AMF ATS CONTROLLER
BE2KP AMF controllers
AMF + CANBUS + MODBUS + 128X64 DISPLAY + RS232 +32I/O. These are the most powerfull AMF controllers available on the market today. These AMF controllers are suitable for making high tech AMF panels for TELECOM applications. These controllers allow setting up a 3-phase Mains & Generator adjustable relay. You can monitor the earth fault current as well. These AMF controllers in addition to the standard functions included in generator control systems feature CANBUS, MODBUS and RS232 serial interfaces. This will allow you connecting the most popular ECU available on the market. In case your engine is without 'ECU', you can connect to the Be2KP analog sensor to get a supreme protection ot the engine. This controller is designed for TELECOM BTS applications. The software automatically shuts down the display when not in use. This prolong the like of the controller fro about 25 years. READ MORE ABOUT BE2KP AMF ATS CONTROLLER
BE42 & BE142 Long Life AMF controllers
AMF + MODBUS + 4 DIGIT DISPLAY +10 I/O. These long life AMF controllers are the most user friendly controllers available on the market today. Are suitable for making general purposes AMF control panels for commercial applications (Stores, Commercial retails, etc). These controllers allows setting up a 3-phase Mains & Generator adjustable relay. These AMF controllers in addition to the standard functions included in generator control systems feature RS485 serial interface. The controller features analog and digital configurable inputs. Thanks to LED technology the expected life is about 40 years of continuous service. These inputs used in conjunction with the programmable outputs, makes this controller extremely flexible on applications point of view. READ MORE ABOUT BE142 AMF ATS CONTROLLER
BE2K Long life AMF controllers
AMF + RS232+ AVIONIC DISPLAY +32I/O. This is one of the most powerfull AMF controller available on the market today. It is suitable for making high tech AMF ATS panels for special applications. The controller allows setting up a 3-phase Mains & Generator adjustable relay. The AMF controller is addition to the standard functions included in generator control system features an RS232 serial interfaces. In case your engine is without 'ECU', you can connect to the Be2K analog sensor to get a supreme protection ot the engine. This controller is designed for TELECOM BTS applications. This is a long life rated controller. Expected life is about 50 years of continuous service. READ MORE ABOUT BE2KP AMF ATS CONTROLLER
About AMF Controllers
AMF means AUTOMATIC MAINS FAILURE (more often called AMF). It is about an Electric Module that automatically controls a Standby Generator. In other words, an AMF Panel is the proper choice in cases where you have to control a generator that is connected to the Mains in a standby configuration. The AMF panel fitted with an AMF controller manages, in a fully automatic way, the connection assignment of the LOAD to MAINS or GENERATOR. The AMF controller in this case features all programmable parameters that will allow the AMF panel detecting a Mains Failure and a Mains Restore.
Finally a small clarification about AMF & ATS (AUTOMATIC TRANSFER SWITCH) controllers. In a way we can say that ATS controller is similar to a AMF controller. The basic difference is that AMF controller, once in AUTO mode of operation, provides a global control of the engine and generator. ATS controller is more simple: it takes care to concentrate all logic on switching in a safe way the LOAD to MAINS or GENERATOR. The control panel is more simple, because it does not include the monitoring of all parameters of the engine. We can say that an ATS controller is more 'ORIENTED & SPECIFIC TO MANAGE THE LOAD'. But, when using an ATS controller you have to make sure that your generator is well equipped with a reliable Auto Start Module.
WHAT IS AN AUTOMATIC MAINS FAILURE MODULE
All AMF controllers made by Bernini Design feature the RS485. This is an industrial-grade serial interface suitable for factory automation. The AMF controllers support the MODBUS RTU. Each controller comes with MODBUS register documentation. In this way a customer can integrate the controller in the industrial equipment communication network. Despite the fact that Bernini Design supplies a software for control & monitoring, you can use the register documentation to build your own application. The MODBUS RTU protocol will allow you to control the entire AMF panel from a remote location. You can transfer the LOAD to Mains or Generator supposing the controller is placed in AUTO mode of operation. You can monitor all electrical parameters: Voltages, Amperage, Frequency and so on. You can start & stop the engine by remote as well. We dedicated particular attention to the security of the system. All functions made by remote can be password protected. The AMF controllers made by Bernini Design are able to drive up to 1000 meters of a twisted cable. The RS485 can drive up to 127 hardware connections. In case you need more advanced features, the AMF controllers can be fitted with optional accessories that will allow you GSM and INTERNET connection.
All connections to
the panel are made via terminal block with a proper size. The most advanced AMF control systems provides a Canbus module to interface with SAE J1939 compatible engines.
First of all: what an Automatic Mains Failure Controller is. An 'Automatic Mains Failure' controller is the ideal choice in cases where you have to control a Genset that is connected to the Mains in a standby configuration. In other words a system that is normally waiting for a failure of the Mains Power. A panel fitted with Automatic Mains Failure controller manages, in a fully automatic way, the connection assignment of the LOAD to MAINS or GENERATOR. The panel includes an automatic battery charger and a set of electronic circuit boards complete with power relays that interface directly with the engine. The Automatic Mains Failure controller is conveniently tasked with driving the Circuit breakers or Switch-gear. Despite the fact that the power configuration and general arrangement is the same for all panels, the input output lines for the engine connection and ancillary equipment depends on the type of controller fitted to the panel. Ancillary devices are normally provided, example: RS485 serial interface, remote control, monitoring systems, Modems, Internet connection and so on. Available sizes on the market are normally in the range 10-1000kVA. A normal house or big villa needs as much as 9kVA of power.
On the left the basic Panel Circuit Diagram configuration with an Automatic Mains Failure controller. The Automatic Mains Failure controller (4) is wired to the MAINS (7) via protection fuses (2). The fuses protects the cables from short circuits. The Automatic Mains Failure Controller presents normally an high impedance over 4 Mega ohm on the voltage measurements inputs.The Automatic Mains Failure controller (4) is wired to the GENERATOR (15) via protection fuses (12) in the same way as above. Current of the generator is measured via Current Transformers (10). The Automatic Mains Failure controller (4) drives the coils of the circuit breakers (6) & (8). The AMF controller (4) is connected to the engine (14) via cables and relays (21). In some cases extra driver relays are required if the distance is over 100 meters (17) & (18). The Automatic Mains Failure controller (4 ) is tasked to monitor and charge the battery (19) via a battery charger (not shown for simplicity). The Power Circuit Breakers (6) & (8) are included in the panel in a way to connect the Load (9) to the Generator (15) or Mains (7). A serial interface (20) allows you a remote control and monitoring. The components are enclosed in a steel cabinet (3). The frontal doors features a key lock to avoid mot authorized access and an Emergency Switch to disable the panel and/or the Generator. The Automatic Mains Failure controller features a user friendly interface via push buttons and display (22) & (23). A more complex Automatic Mains Failure panel may include extra relay for extra-alarm indication and electronic boards to interface with external programmable logic controller (19). All modes of operation are normally chosen directly on the front panel of the Automatic Mains Failure Controller, but in some cases some extra key-switches are required to switch the mode of operation (23).
AMF CONTROLLERS VIDEO TUTORIAL
In these videos you are going to see the main features of an AMF controller and how the AMF control panel works. There you are some specific examples. The AUTO mode operation may require some additional explanation. The Be142 AMF controller continuously monitors the status of the MAINS. The Be142 AMF controller allows you to set low/high limits for Mains Voltage and low/high limits for the Mains Frequency. In other words, when the voltage and the frequency are within the limits, the Be142 AMF controller transfers the load to the Mains. If the voltage drops below the lower limit (or rises above the high limit) or, if the frequency drops below its limit (or rises above its limit), the Be142 AMF controller will disable the Mains circuit breaker. This prevent, after a programmable delay, a severe damage to your load. So, we can say that Be142 AMF controller prevents, in the first place a damage to your systems. Then, if the failure persists for a long time (a programmable timer is available ranging from seconds up to hours) the Be142 AMF controller will take care to start you emergency generator. Once again the Be142 AMF controller does its business to check the quality of the generator voltage and frequency. Once detected that the parameters are within the programmed limits, the BE142 AMF controller will enable the generator circuit breaker. Now, in case of prolonged power outages, your load is safely supplied by your emergency generator. Be142 AMF controller as we understood before does not forget to pay attention to the Mains. So, when the Mains parameters will return within the programmed settings, the Be142 AMF controller will transfer the load to MAINS. This will happen after a delay that will ensure that the Mains is in stable conditions. Once your load is connected to the Mains, the engine will run for a programmable time (so called COOLING DOWN TIME) without load. After the cooling down time the engine will stop and the BE142 AMF controller (and consequently the AMF control panel) is ready for a new power outage.
AMF CONTROLLER MANUFACTURERS
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