VAMP Ltd Feeder and motor manager
Operation and configuration
VAMP 257
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7.1.2. Configuration example
The example below illustrates the calculation and scaling of
setting values and the grouping of output relays in a typical
protection configuration. The numerical values given in the
example are to be regarded as guidelines only.
Example:
The example is based on the application shown in Figure 3.1-1
in the chapter 3 of the Technical Description.
The application uses the following protection functions and
parameters:
• Two-stage overcurrent protection I>, I>> (Status, I>, Type,
t>; Status, I>>, t>)
• Unbalance protection I2> (Status, I2>, t>)
• Earth fault protection Io> (Status, Io>, Type, t>)
• Directional earth fault protection Ioϕ> (Status, Ioϕ>, t>,
ChCtrl, Uo, Offset)
• Residual voltage protection Uo> (Status, Uo>, t>)
• Thermal overload stage T> (Temp, Status, T>, Alarm, tau)
• Auto-reclose function AR (ReclT, PulseL, ReadyT)
• 2. harmonics stage If2> (2. Harm, t_2Har)
The above functions are enabled via the Prot/ENABLED
STAGES_ -menu by selecting "On" in the Enable display, see
chapter 5.5 on page 32. The functions that are not needed can
be disabled by selecting the "Off" value.
1 Start data
The configuration menus where the settings are done are given
in parenthesis.
Transforming ratios of measurement transformers:
Phase current transformers (CT) Inom 500A
(CONF/CURRENT SCALING) Isec 5.0A
Io current transformer (CT) Ionom 100A
(CONF/CURRENT SCALING) Iosec 1.0A
Ioinp 1.0A
Uo voltage transformers (VT) Uosec 100V
(CONF/VOLTAGE SCALING)
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