Description
Lumel BA27 Bimetallic ammeters and combined ammeters are especially intended for thermal monitoring of transformers, cables and other electrical devices which have a slow reaction to current changes. They indicate the mean rms current value during the measuring period of the meter (8 or 15 minute). These meters do not react to short current pulses essentially. The range of these meters can be enlarged by means of external measuring current transformers which are also offered by LUMEL and can be delivered on request if the meter is ordered in the option enabling a direct assembling on the current transformer.
The BA27 Bimetallic ammeters is a type of maximum demand ammeter. For this type, the bimetallic movement responds and indicates the mean rms current loading over a specified period of time. A black pointer which is attached to the bimetal spiral moves in response to the current (heating) in the bimetal spiral. A red pointer (slave or memory pointer) is driven by the black pointer. The red pointer remains at its maximum position to which the black pointer has reached during any period of time. Further, when the loading is reduced, the red pointer remains at the maximum value. This enables the operator to know the maximum loading of the system without continuously watching the meter. A reset knob is provided on the front of the meter to bring back the red pointer to the position of the black pointer. A sealing/locking facility is also provided on the reset knob to prevent tampering of the reading at the red pointer. You can also use a 0.5mm diameter wire for locking.
Lumel are the producers of automation devices for measurement, control, transmission and visualisation of various industrial processes. They also provide Services of designing and manufacturing of automation systems.
Since 1954 Lumel brand has been known as a producer of quality measuring devices and high-pressure die-casting all over the world. Their high position in the market has been achieved thanks to continuous development, employees and modern technology in areas of research, design and production. They deliver complex solutions for power and industrial automation sector as well as for automobile, chemical, steel, or HVAC industries
Their objective is to provide comprehensive solutions by designing intelligent systems based on the electronics Lumel manufactures, which are measuring and regulating equipment for industrial, automotive and military applications, as well as through service production of electronics.
