VAMP 257 - Page 57

VAMP Ltd Feeder and motor manager
Technical description
VAMP 257
VM257.EN002 VAMP 24h support phone : +358 (0)20 753 3264
15
Operation delay selection (only for I>)
Curve
Curve
Type
A…E
- curve family selection
- delay type selection
- formula parameters
DT
IEC
IEEE
IEEE2
RI
Prg1 Prg2 Prg3
RXIDG
X
Parameters
Function parameters
X X X
Programmable curve 1
X
Programmable curve 2
X
Programmable curve 3
16 programmable
[current, time] points
for each curve
X
A
X X X
B
X X X
C
X X
D
X
Parameters
Active only, when
Type = Parameters
Usage of these parameters are defined by
the delay formulas
E
X
Definite operating time Unit:
Seconds
t> 0.08 ... 300.00 0.3
t>> 0.04 … 300.00 0.6
Param.
t>>>
Range
0.04 … 300.00
Default
0.1
Inverse time multiplier (only for I>)
0.05 ... 20.00
(IEC)
(IEEE)
(IEEE2)
Param.
k
Range
0.5 … 20.00
(RI)
Default
1.0
Event enabling Range:
Enabled/disabled
S_On
Start on event
Enabled
S_Off
Start off event
Enabled
T_On
Trip on event
Enabled
Param.
T_Off
Trip off event
Default
Enabled
Inverse operation time formulas (only for I>)
Curve family: IEC Parameters:
A, B
1−
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
=
B
pickup
I
I
Ak
t
Standard delays A B
NI Normal inverse 0.14 0.02
EI Extremely inverse 80 2
VI Very inverse 13.5 1
LTI Long time inverse 120 1