VAMP 259 User Manual

2.24 Inverse time operation
2 Protection functions
Technical description
144
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VM259.EN007
2.24.3. Programmable inverse time curves
Only with VAMPSET, requires rebooting.
The [current, time] curve points are programmed using
VAMPSET PC program. There are some rules for defining the
curve points:
 configuration must begin from the topmost row
 row order must be as follows: the smallest current (longest
operation time) on the top and the largest current (shortest
operation time) on the bottom
 all unused rows (on the bottom) should be filled with [1.00
0.00s]
Here is an example configuration of curve points:
Point
Current I/I
pick-up
Operation delay
1
1.00
10.00 s
2
2.00
6.50 s
3
5.00
4.00 s
4
10.00
3.00 s
5
20.00
2.00 s
6
40.00
1.00 s
7
1.00
0.00 s
8
1.00
0.00 s
9
1.00
0.00 s
10
1.00
0.00 s
11
1.00
0.00 s
12
1.00
0.00 s
13
1.00
0.00 s
14
1.00
0.00 s
15
1.00
0.00 s
16
1.00
0.00 s
Inverse time setting error signal
The inverse time setting error signal will be activated, if
interpolation with the given points fails. See chapter 2.24 for
more details.
Limitations
The minimum definite time delay start latest, when the
measured value is twenty times the setting. However, there are
limitations at high setting values due to the measurement
range. See chapter 2.24 for more details.

VAMP 259 Specifications

General

Brand	VAMP
Model	259
Category	Control Unit
Language	English