5–66
369 MOTOR MANAGEMENT RELAY – QUICKSTART GUIDE
SPECIFICATIONS CHAPTER 5: PRODUCT DESCRIPTION
50G/51G 50N/51N GROUND FAULT
Pickup Level: .....................................................0.10 to 1.00 × CT for 1 A/5 A CT
0.25 to 25.00 A for 50:0.025 CT
Pickup Accuracy: ............................................as per ground current inputs
Dropout Level:..................................................96 to 98% of pickup
Time Delay:........................................................0 to 255.00 s in steps of 0.01 s
Backup Delay: ..................................................0.01 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
ACCELERATION TRIP
Pickup Level: .....................................................motor start condition
Dropout Level:..................................................motor run, trip or stop condition
Time Delay:........................................................1.0 to 250.0 s in steps of 0.1
Timing Accuracy:............................................±100 ms or ±0.5% of total time
38/49 RTD AND RRTD PROTECTION
Pickup Level: .....................................................1 to 200
°
C or 34 to 392
°
F
Pickup Accuracy:
...................................±
2
°
C or
±
4
°
F
Dropout Level:..................................................96 to 98% of pickup above 80°C
Time Delay:........................................................<5 s
OPEN RTD ALARM
Pickup Level: .....................................................detection of an open RTD
Pickup Accuracy: ............................................>1000
Ω
Dropout Level:..................................................96 to 98% of pickup
Time Delay:........................................................<5 s
SHORT/LOW TEMP RTD ALARM
Pickup Level: .....................................................<–40
°
C or –40
°
F
Pickup Accuracy:
...................................±
2
°
C or
±
4
°
F
Dropout Level:..................................................96 to 98% of pickup
Time Delay:........................................................<5 s
LOSS OF RRTD COMMS ALARM
Pickup Level: .....................................................no communication
Time Delay:........................................................2 to 5 s
27 UNDERVOLTAGE
Pickup Level: .....................................................0.50 to 0.99 × rated in steps of 0.01
Pickup Accuracy: ............................................as per phase voltage inputs
Dropout Level:..................................................102 to 104% of pickup
Time Delay:........................................................0.0 to 255.0 s in steps of 0.1
Start Delay:........................................................separate level for start conditions
Timing Accuracy:............................................+75 ms for delays <50 ms
±100 ms or ±0.5% of total trip time
59 OVERVOLTAGE
Pickup Level: .....................................................1.01 to 1.25 × rated in steps of 0.01
Pickup Accuracy: ............................................as per phase voltage inputs
Dropout Level:..................................................96 to 98% of pickup
Time Delay:........................................................0.0 to 255.0 s in steps of 0.1
Timing Accuracy:............................................±100 ms or ±0.5% of total trip time
47 PHASE REVERSAL
Pickup Level: .....................................................phase reversal detected
Time Delay:........................................................500 to 700 ms
