23
S280-77-4
!
SAFETY
FOR LIFE
Features ON/OFF (cont’d)
Security
Limits
Access
Factory
Code
Write
Read
Scroll
High
Low
Incr
Parameter
Settings
25
1
0
YES
--
--
--
Ground Trip Precedence (ON/OFF)
ON
•
Ground Trip Precedence ON:
For all faults above
the programmed ground minimum trip level, the
number of operations to lockout equals the pro-
grammed number of ground operations to lockout.
•
Select Ground Trip Precedence ON or OFF using
the CHANGE key.
•
Ground Trip Precedence OFF:
For all faults
between the programmed ground minimum trip
level and the programmed phase minimum trip
level, the number of operations to lockout equals
the programmed number of ground operations to
lockout. For all faults above the programmed phase
minimum trip level, the number of operations to
lockout equals the programmed number of phase
operations to lockout.
Minimum Trip - Phase (Access Code 01P) ............200 A
Minimum Trip - Ground (Access Code 01G) ..........100 A
TCC1 - Phase (Access Code 02P)..........................103
TCC1 - Ground (Access Code 02G) .......................101
TCC2 - Phase (Access Code 03P)..........................133
TCC2 - Ground (Access Code 03G) .......................135
Operations on TCC1 - Phase (Access Code 04P) ......2
Operations on TCC1 - Ground (Access Code 04G) ....1
Operations to Lockout - Phase (Access Code 05P) ....4
Operations to Lockout - Ground (Access Code 05G)..2
Ground Trip
Ground Trip
Fault Current
Precedence
Precedence
Level
ON
OFF
100 - 200 A
101, 135
101, 135
200 - 818 A
101, 103
101, 103, 135, 135
818 - 1690 A
101, 103
101, 103, 133, 133
1690A and above
103, 103
103, 103, 133, 133
Sample application utilizing the Ground Trip
Precedence feature. Table 4 and Figure 6 refer-
ence the following settings:
TABLE 4
Trip sequence to lockout for a ground fault.
0.01
0.1
1.0
10
100
135
GROUND
TCC#2
133
PHASE
TCC#2
101
GROUND
TCC#1
103
PHASE
TCC#1
100
818
1000
1690
10000
TIME (sec)
CURRENT (A)
200
Figure 6.
Ground Trip Precedence Feature.