DESCRIPTION

The 825-MCM20 is a currency converter module from Allen-Bradley.

It is part of the 825-P Motor Modular Protection System and is rated for 690 VAC (IEC) and 600 VAC (CSA/UL).

It has an inrush rating of 6 kV, an operating current range of 2.5-20 amps, a continuous thermal current of 24 amps, 

a saturation current rating of 240 amps, and a frequency rating of 50/60 Hz ± 3 Hz.

The converter has a PTC thermistor input and supports six (6) sensors in series.

About the 825-MCM20

The 825-MCM20 is Allen-Bradley’s currency converter module. It is part of the Bulletin 825-P Motor Protection System.

The device is designed primarily to protect industrial three-phase motors, providing thermal overload, 

PTC (positive temperature coefficient) overheat, undercurrent (load loss), current unbalance, and phase loss,

overcurrent (load jamming), short circuit, ground fault (residual), ground fault (zero sequence), 

frequency and other protective functions, as well as motor start/run and other motor start and run protection functions, such as a variety of motor start and run protection.

Protection prohibition at start, start motor timer, notch or pointing device, TCU (thermal capacity utilization) start prohibition, anti-reverse rotation timer, emergency start,

two-speed protection, reduced voltage start (star-delta) and stall switch.

The 825-MCM20 module is specifically designed for use in a variety of line starter applications,

especially low and medium voltage with 2 or 3 potential transformers, with or without phase current transformers,

with or without zero sequence core balancing current transformers, with or without external RTD module, reversing starters, star delta starters and two speed motors.