GE EntelliGuard G - Maintenance, Testing and Troubleshooting; Maintenance

DET-653C EntelliGuard
®
G Circuit Breaker Application Guide
24-May-12 Section 3. EntelliGuard TU Trip Unit System
©2012 General Electric All Rights Reserved
33
EntelliGuard Trip Unit Performance Characteristics Graphs
Table 3.27 provides an overview of the trip unit features, characteristics, specifications and accuracy.
Table 3.27. EntelliGuard Trip Unit Summary
Feature
Characteristic
Specification
Protection Curves
I
2
T Slopes
22
I
4
t Slopes
22
IEEE MV (2)
no
IEC MV (2)
no
Neutral
Neutral Over Current Protection
yes
Long Time PU (Ir) and Delays
Pick Up Range
0.5-1.0 (0.05 steps x Plug
I
2
t Range Delays at 6 X
0.5sec – 22sec
I
4
t Range Delays at 6 X
0.004sec – 3.09 sec
Long Time Thermal Memory
yes
Short Time Pick and Delays
Pick Up Range
1.5-12X
ST Delay Band Range (Commit Time)
0.025sec - 0.417sec
Band Width
55msec
ST Delay Bands
11 (UL), 17 (IEC)
I
2
T Slopes
3
I
2
T Adjustment
with LT pick up
Instantaneous Protection
Adjustable IPU Range (3)
1.5-15X & OFF
Extended Range Adjustable IPU
1.5-30A & OFF
Making Current Release
yes
Override
yes
Alternate IPU with Remote Enable
yes (RELT IPU)
Selective Instantaneous
yes