Table of Contents
Advertisement
SAFETY
FOR LIFE
Access codes, parameter descriptions, and security lev-
els used in programming the Form 4C control are listed
in this section of the programming guide. The high and
low limits and increments of the code parameter values
are also specified.
Programming
Security
Access
Code
Write
Read
01
1
0
01
1
0
• Minimum trip is a threshold value at which a system
overcurrent is detected.
• Minimum Trip is set for both phase and ground
through a range of settings based on the recloser's
CT ratio.
CT ratio 500:1 allows a range from 25 to 800 A
phase and 2 to 400 A ground.
CT ratio 1000:1 allows a range from 50 to 1600 A
phase and 5 to 800 A ground.
CT ratio 2000:1 allows a range from 100 to 2400 A
phase and 10 to 1600 A ground.
Security
Access
Code
Write
Read
02
1
0
02
1
0
• TCC is an abbreviation for time–current curve. A
TCC is used as a protective response to initiate a
trip signal when the minimum trip value (phase or
ground) is exceeded.
• Identifies the programmed TCC1 - phase and ground
curves selected from the TCC timing groups of the
Form 4C control. (Reference Access Code 70). In
most situations, TCC1 is designated as the fast
curve.
• Time–current characteristics for TCC1 - phase are
independent of time–current characteristics for TCC1
ground.
ACCESS CODE DESCRIPTIONS
Limits
Scroll
High
Low
YES
1600
50
YES
800
5
Limits
Scroll
High
Low
YES
--
--
YES
--
--
The control is furnished with indicated factory settings.
These settings are not recommended for customer use.
The control must be programmed with applicable set-
tings prior to installation.
Incr
Parameter
1
Minimum Trip - Phase
1
Minimum Trip - Ground
• All values are adjusted in increments of 1.
• The control accepts only the values within the limits
preset in the control. Attempts to enter other values
results in a LO/HI message.
• Use the PHASE/GROUND key to select phase and
ground.
Incr
Parameter
--
TCC1 - Phase
--
TCC1 - Ground
• Time–current characteristics of TCC1 - phase and
ground are independent of time–current characteris-
tics of TCC2 - phase and ground.
• When TCC characteristics are modified, the control
readout indicates a modified curve by prefixing the
TCC number with a lower-case c (Access Codes
100-114).
S280-77-4
Factory
Settings
100
50
Factory
Settings
104
106
17
Advertisement
Table of Contents
