GE Masoneilan 469 Series, Instruction Manual

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2–10 469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 2: INTRODUCTION
PHASE DIFFERENTIAL INSTANTANEOUS OVERCURRENT
Pickup level:.......................................................0.05 to 1.0 × CT primary in steps of 0.01 of any one phase
Time delay:........................................................0 to 1000 ms in steps of 10
Pickup accuracy: ...........................................as per phase differential current inputs
Timing accuracy: ...........................................+50 ms
Elements:............................................................Trip
PHASE SHORT CIRCUIT
Pickup level:.......................................................2.0 to 20.0 × CT primary in steps of 0.1 of any one phase
Time delay:........................................................0 to 1000 ms in steps of 10
Pickup accuracy: ...........................................as per phase current inputs
Operate time (0 ms time delay): ..............<25 ms @ 60 Hz (I > 1.5 x Pickup)*
<30 ms @ 50 Hz (I > 1.5 x Pickup)*
Timing accuracy: ...........................................+50 ms
Elements:............................................................Trip
* Applies if Voltage phase A detected, Motor Status Running and frequency within 5% of
nominal (<50ms if these conditions are not met).
REDUCED VOLTAGE START
Transition level: ..............................................25 to 300% FLA in steps of 1
Transition time: ...............................................1 to 600 s in steps of 1
Transition control: .........................................Current, Timer, Current and Timer
RESTART BLOCK
Time delay:........................................................1 to 50000 s in steps of 1
Timing accuracy: ...........................................±0.5 s or ±0.5% of total time
Elements:............................................................Block
RTD
Pickup: .................................................................1 to 250°C in steps of 1
Pickup hysteresis: ..........................................2°C
Time delay:........................................................4 s
Elements:............................................................Trip and Alarm
UNDERCURRENT
Pickup level:.......................................................0.10 to 0.95 × CT primary in steps of 0.01 of any one
phase
Time delay:........................................................1 to 60 s in steps of 1
Block from start: ............................................0 to 15000 s in steps of 1
Pickup accuracy: ...........................................as per phase current inputs
Timing accuracy: ...........................................±0.5 s or ±0.5% of total time (Note 1)
Elements:............................................................Trip and Alarm
UNDERVOLTAGE
Pickup Level:
Motor starting: .............................................0.60 to 0.99 × Rated in steps of 0.01
Motor running: .............................................0.60 to 0.99 × Rated in steps of 0.01 of any one phase
Time delay:........................................................0.1 to 60.0 s in steps of 0.1
Pickup accuracy: ...........................................as per voltage inputs
Timing accuracy: ...........................................<100 ms or ±0.5% of total time
Elements:............................................................Trip and Alarm