EMPR IMP Series Operation and Setting
Reverse Phase Current
Unbalance Rate
Current Unit
R Phase S Phase T Phase Ground Fault Current Load Rate Display
Load Rate Unit Communication Status
Note) kW, kVar, and V indicate the specification of the voltage models (under development).
Operation Display Display
Description
Remark
O-C
Excess Current Trip
Operate within predefined time.
U-C
Low Current Trip
Operate within three seconds.
P-F
Open Phase Trip
Operate within 1.5 seconds when the unbalance rate is over 70%.
P-U
Unbalance Trip
Operate within three seconds.
Loc
Constraint Trip
Operate within 0.5 seconds.
StL
Stall Trip
Operate within three seconds.
r-P
Reverse Phase Trip
Operate within 0.1 second.
g-F
Ground Fault Trip
Operate within predefined time.
Sho
Instantaneous Trip
Operate within 0.05 seconds.
OrH
Elapsed Time (No Trip)
The operation time is reset when the Reset key is pressed.
C.err
Communication Fault between Body and Display (Press the ENTER/RESET key to return to the normal mode)
7. IMP Specifications for Low Voltage 3-Phase Induction Motors (Reference) Full Load Current for the Motor
IMP Settings Current Selection S/W Wire Penetration
0.7A or less 0.7~1.6A
0.5~10A
1.6~8A 7~100A
220V
380V
4 times
CT Setup 0.25
-
0.1
0.18
440V 0.2
Twice
0.5
-
0.25
0.55
0.6
Once
1
-
1.5
3
3.7
Once
1
-
25
45
55
90~120A
Once
30
SCT-150
30
55
55
120A~160A
Once
40
SCT-200
45
75
90
160~240A
Once
60
SCT-300
55
110
132
240~320A
5~100A
Motor Output (Less than kW)
External CT
Once
80
SCT-400
90
160
160
320~400A
0.5~10A
Once
100
500 : 5
110
200
200
400~480A
Once
120
600 : 5
132
250
250
480~640A
Once
160
800 : 5
160
320
320
Note 1) This table is written based on the full load current. Note 2) The CT is selected as a reference for the EMPR’s current setting range.
10