Cemented and enamelled wiredound resistors model PME

These resistors are easy to assemble and have been designed for limited occupancy of space for mounting in groups.
Upon request, they may be supplied with accessories suitable for attachment and grouping.
The external protection is secured through total lining in high thermal conductivity inorganic cement.
The resistive element consists of wire in Ni-Cr alloy or twisted constantan, on an extremely pure ceramic plate.

ELECTRICAL CHARACTERISTICS

· Standard tolerance: ± 10%
· Temperature coefficient ≤ 100 ppm/°C
· Insulation resistance > 100 Mohm (500 Vdc)
· Max operating temperature: 350 °C

MAXIMUM LOAD LIMIT

The nominal power Pn shown in the table refers to resistors placed horizontally and free in naturally circulating air, with an environmental temperature of 25° C.
With forced ventilation the nominal power dissipation capacity of the resistor increases as a function of the air speed.

STANDARD CHARACTERISTICS


 
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