CHAPTER 5: PRODUCT DESCRIPTION SPECIFICATIONS
369 MOTOR MANAGEMENT RELAY – QUICKSTART GUIDE
5–65
5.2.5
Protection Elements
51 OVERLOAD/STALL/THERMAL MODEL
Curve Shape: ....................................................1 to 15 standard, custom
Curve Biasing: ..................................................unbalance, temperature, hot/cold ratio,
cool time constants
Pickup Level: .....................................................1.01 to 1.25 × FLA
Pickup Accuracy: ............................................as per phase current inputs
Dropout Level:..................................................96 to 98% of pickup
Timing Accuracy:............................................±100 ms or ±2% of total trip time
THERMAL CAPACITY ALARM
Pickup Level: .....................................................1 to 100% TC in steps of 1
Pickup Accuracy: ............................................±2%
Dropout Level:..................................................96 to 98% of pickup
Timing Accuracy:............................................±100 ms
OVERLOAD ALARM
Pickup Level: .....................................................1.01 to 1.50 × FLA in steps of 0.01
Pickup Accuracy: ............................................as per phase current inputs
Dropout Level:..................................................96 to 98% of pickup
Time Delay: .......................................................0.1 to 60.0 s in steps of 0.1
Timing Accuracy:............................................±100 ms or ±2% of total trip time
50 SHORT CIRCUIT
Pickup Level: .....................................................2.0 to 20.0 × CT in steps of 0.1
Pickup Accuracy: ............................................as per phase current inputs
Dropout Level:..................................................96 to 98% of pickup
Time Delay: .......................................................0 to 255.00 s in steps of 0.01 s
Backup Delay: ..................................................0.10 to 255.00 s in steps of 0.01 s
Timing Accuracy:............................................+50 ms for delays <50 ms
±100 ms or ±0.5% of total trip time
MECHANICAL JAM
Pickup Level: .....................................................1.01 to 6.00 × FLA in steps of 0.01
Pickup Accuracy: ............................................as per phase current inputs
Dropout Level:..................................................96 to 98% of pickup
Time Delay: .......................................................0.5 to 125.0 s in steps of 0.5
Timing Accuracy:............................................±250 ms or ±0.5% of total trip time
37 UNDERCURRENT
Pickup Level: .....................................................0.10 to 0.99 × FLA in steps of 0.01
Pickup Accuracy: ............................................as per phase current inputs
Dropout Level:..................................................102 to 104% of pickup
Time Delay: .......................................................1 to 255 s in steps of 1
Start Delay:........................................................0 to 15000 s in steps of 1
Timing Accuracy:............................................±500 ms or ±0.5% of total time
46 UNBALANCE
Pickup Level: .....................................................4 to 30% in steps of 1
Pickup Accuracy: ............................................±2%
Dropout Level:..................................................1 to 2% below pickup
Time Delay: .......................................................1 to 255 s in steps of 1
Start Delay:........................................................0 to 5000 s in steps of 1
Timing Accuracy:............................................±500 ms or ±0.5% of total time
