VAMP 130 Overcurrent and earth-fault relay
Operation and Configuration
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7. Other required parameters, for example the circuit breaker
failure protection.
7.1.2. Configuration example
The following example illustrates the calculation and scaling of
setting values and the grouping of output relays in a typical
protection configuration. The values given in the example are to
be regarded as guidelines only.
Example:
The example is based on the technical application drawing of
Chapter 3, Figure 3.1-1 in the technical description.
In the application the following functions and stages are used:
• Three-stage overcurrent protection (I>, t>; I>>, t>> and
I>>>, t>>>)
• Three-stage residual current protection (Io>, t> and Io>>,
t>> and Io>>>,t>>>)
The above functions are enabled via the ENABLE menu by
selecting the "On" in the ENABLE menu, see Chapter 5.2. the
functions not to be included are disabled by selecting the “Off”
value.
1 Output data:
Given within the parenthesis are the configuration menus where
the settings are done.
Transforming ratios of measurement transformers
Current transformer (CT) CTprim 600 A
(SCALING) CTsec 5 A
Residual current transformer (CTo)
(SCALING)
CToprim
CTosec
Ioinp
100 A
5 A
5 A
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