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.
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.
ACCESS CODE DESCRIPTIONS
Programming
Security Limits
Access Factory
Code Write Read Scroll High Low Incr Parameter Settings
01 1 0 YES 1600 50 1 Minimum Trip - Phase 100
01 1 0 YES 800 5 1 Minimum Trip - Ground 50
• 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.
• 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.
Security Limits
Access Factory
Code Write Read Scroll High Low Incr Parameter Settings
02 1 0 YES -- -- -- TCC1 - Phase 104
02 1 0 YES -- -- -- TCC1 - Ground 106
• 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.
• 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).
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