EP OS MOTOR MANAGEMENT SY STEM – INSTRUCTION MANUAL
1.9
1.2 Specifications
NOTE:
Specifications are subject to change without notice.
1.2.1 Protection Specifications
Overload Fault (Thermal Model)
IEC Class curves ....................................................................5, 10, 15, 20, 25, 30, 35, 40 (IEC 60947)
Thermal overload pickup ..................................................1.20
Motor full-load current (FLA) ............................................1/6 Ict to Ict in steps of 0.1
Curve biasing
Phase loss: ....................................................................1.83 x Ir
Phase unbalance: .......................................................1.43 x Ir
Timing accuracy....................................................................
±10% up to 8 x FLA and
±20%
from 8 to 10 x FLA
Elements ...................................................................................fault (trip) and warning (alarm)
- warning not valid for ATEX
Phase Loss
Range ........................................................................................fixed at 60% (any phase <40% of max phase)
Accuracy...................................................................................±5%
Time delay................................................................................0–15 seconds in steps of 1s (0 = disable)
immediately when ATEX is selected
Timing accuracy.................................................................... ±20%
Elements ................................................................................... fault (trip) and warning (alarm)
- warning not valid for ATEX
Current Unbalance
Range.........................................................................................fixed at 30% (any phase <70% of max phase)
Accuracy...................................................................................±5%
Time delay................................................................................0–15 seconds in steps of 1s (0 = disable)
Fix to 500ms when ATEX is selected
Timing accuracy....................................................................±20%
Elements ...................................................................................fault (trip) and warning (alarm)
Ground Fault
Pickup level..............................................................................20–100% of FLA in steps of 10%
Trip time delay band ...........................................................0.1–1.0s in steps of 0.1s
(other values will generate an error)
Timing accuracy....................................................................±20%
Elements ...................................................................................fault (trip) and warning (alarm)
