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CHAPTER 1: INTRODUCTION SPECIFICATIONS
LM10 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 1–9
Ground CT input:.............................................20 A ground fault sensor or 20:0.2 A ground fault CT
VOLTAGE
PT secondary:...................................................0 to 120 V
PT primary: ........................................................200 to 7200 V
CONTACT INPUT
Inputs:..................................................................7 fixed inputs (Run 1, Run 2, Aux sense 1, Aux sense 2,
Stop, Reset, DeviceNet control)
Recommended Supply voltage: ..............100 to 135 V AC
When the LM10 contact inputs are connected to the remote devices for the input signal via long
cables, induced voltages may be present at the input terminal of LM10 relay. The contact input
status could be detected as closed if the induced voltages are greater than 33V. Under these
situations it is recomonded to use interposing relay or to connect a resistor across the LM10
contact input terminal and ground to provide path for the induced voltages to the ground.