VAMP 50 User Manual

Technical description 3 Supporting functions 3.5 Circuit breaker condition
monitorin
g
VM50.EN004 VAMP 24h support phone +358 (0)20 753 3264
119
10
20
50
100
1000
10000
100000
100 200 500 1000 10000 100000
Number of permitted operations
Breaked current (A)
CBWEARcharacteristics
Figure 3.5-1. An example of a circuit breaker wearing characteristic graph.
Table 3.5-1. An example of circuit breaker wearing
characteristics in a table format. The values are taken from
the figure above. The table is edited with VAMPSET under
menu "BREAKER CURVE".
Point Interrupted current
(kA)
Number of permitted
operations
1 0 (mechanical age) 10000
2 1.25 (rated current) 10000
3 31.0 (maximum breaking current) 80
4 100 1
5 100 1
6 100 1
7 100 1
8 100 1
Setting alarm points
There are two alarm points available having two setting
parameters each.
 Current.
The first alarm can be set for example to nominal current of
the CB or any application typical current. The second alarm
can be set for example according a typical fault current.
 Operations left alarm limit
An alarm is activated when there are less operation left at
the given current level than this limit.
Any actual interrupted current will be logarithmically weighted
for the two given alarm current levels and the number of
operations left at the alarm points is decreased accordingly.
When the "operations left" i.e. the number of remaining
operations, goes under the given alarm limit, an alarm signal is
issued to the output matrix. Also an event is generated
depending on the event enabling.

VAMP 50 Specifications

General

Brand	VAMP
Model	50
Category	Relays
Language	English