VAMP Ltd
Over-, under-, residual voltage and
frequency relay
Technical description
VAMP 135
VM135.EN008
VAMP 24h support phone : +358 (0)20 753 3264
17
2.5.1.
Output relay matrix
By means of the relay matrix the output signals of the various
protection stages can be combined with the trip relay T1 and
T2, alarm relays A1...A3 and the operation indicator L1
(Alarm) and L2 (Trip).
When the signals are combined, two functions can be selected,
the signal follower function (o) or the latching function (•), see
Figure 2.5-1.
The "Reset all latches" function resets all latched output relays
and operation indicators. The reset signal can be given via a
digital input, the key pad or the serial port. If the reset signal
is to be given via the digital input DI1, the input DI1 must be
configured to function as a reset input from DIGITAL
IN/RemRel menu.
2.5.2.
Blocking matrix
By means of the block matrix the operation of a protection
stage can be blocked. During blocking, a stage will not start or
if already started the delay counter is halted, thus preventing
tripping. The blocking signal can originate from the digital
input DI1, or it can be a start or trip signal from a protection
stage. In Figure 2.5-1, an active blocking is indicated with a
black dot ( • ) in the crossing point of a blocking signal and a
signal to be blocked.
2.6.
Communication
2.6.1.
PC port
The PC port is used for on-site parameterization of the relay,
for downloading of the program and for reading relay
parameters to a PC.
For connection to a PC, one RS 232 serial port is available on
the front panel of the relay. Any connection to the port is done
with the connection cable type VX 003-3.
2.6.2.
Remote control connection
The relay can be connected to higher level systems, e.g.
network control systems via the serial port named REMOTE on
the rear panel. To the port a SPA bus, Modbus
®
, Profibus
®
or
IEC-103 connection can be made using a special internal or
external bus connection module. The bus type selection and the
parameterization of the bus are carried out as the relay is
configured.
Optional accessories are available for RS485 connection (VSE
002), Ethernet connection over TCP/IP protocol (VEA 3CG) and
