Security Limits
Access Factory
Code Write Read Scroll High Low Incr Parameter Settings
101 1 0 YES -- -- -- TCC1 Selection-Phase 104
101 1 0 YES -- -- -- TCC1 Selection-Ground 106
• Allows the selection of a programmed, fast or
delayed, time–current curve to be modified. In most
situations, TCC1 is designated as a fast curve.
• Use the PHASE/GROUND key to select phase or
ground TCC1.
• When TCC characteristics are modified, the readout
of Code 02 will indicate a modified curve by prefixing
the TCC with a lower case c.
• Access codes 101 or 02 can be used to examine
TCC1.
• Changes to Access Code 101 automatically update
Access Code 02.
• Changes to Access Code 02 automatically update
Access Code 101.
Time–Current Curve Modifiers
Security Limits
Access Factory
Code Write Read Scroll High Low Incr Parameter Settings
100 1 0 YES -- -- -- Complex TCC1 Setup-Phase (ON/OFF) OFF*
100 1 0 YES -- -- -- Complex TCC1 Setup-Ground (ON/OFF) OFF*
• Allows for modification of TCC1.
• Use the PHASE/GROUND key to examine phase
and ground.
* Default setting when TCC1 is changed from Access
Code 02 (key 2).
The Form 4C control is equipped with 41 standard keyboard-
selectable time–current curves, interchangeable for phase
and ground TCC1 and TCC2.
Access codes 100 through 114 apply modifiers to the stan-
dard curves to assist in system coordination. A time–current
curve modifier example is presented at the end of this sec-
tion to illustrate the modifier options.
The methods of modification include:
• Constant Time Adder: Add a specific time to the selected
TCC.
• Multiplier Value: Multiply the entire curve by a pro-
grammed value.
• Minimum Response Time Adder: Establish a minimum
control response time independent of the selected TCC.
Security Limits
Access Factory
Code Write Read Scroll High Low Incr Parameter Settings
102 1 0 YES 0.20 0.00 0.01 TCC1 Constant Time Adder- 0.00*
Phase (seconds)
102 1 0 YES 0.20 0.00 0.01 TCC1 Constant Time Adder- 0.00*
Ground (seconds)
• Modifies the programmed TCC1 to delay the time of
overcurrent trip.
• Use with the PHASE/GROUND key to modify phase
or ground TCC1.
* Default setting when TCC1 is changed from Access
Code 02 (key 2).
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