System description
10 TGH1390en/04.2011
MEDICS®includes:
zAC and 3(N)AC changeover and monitoring modules. Examples of modules in the MEDICS® sys-
tem include UMC…, USC…, UFC… and EDS… insulation fault location systems.
zDisplay and operating units such as alarm indicator and operator panels or alarm indicator and
test combinations.
zCommunication between these components takes place via the BMS bus (two-wire connec-
tion).
zThe connection of third-party systems by means of protocol converters (gateways), via digital
inputs and relay outputs.
The real strength of MEDICS®is to be found in communication between all involved components and
the resulting information provided to the user. Readiness for operation is monitored continuously.
Operating states, irregularities, faults and equipment failures are displayed. From the user's point of
view, this means high operational reliability.
3.2 Features USC710D4-..
The USC710D4-.. control module has the following features:
zCircuit-breakers and switch disconnectors of different manufacturers can be connected.
zSuitable for setting up three or four pole changeover modules including switch disconnectors
or circuit-breakers
zVoltage monitoring on the preferred supply (line 1)
zVoltage monitoring on the second supply (line 2)
zVoltage monitoring at the output of the changeover module (line 3 )
zMonitoring of the switching elements to ensure that they are in the correct switching state and
for open-circuits (connecting wires, the circuits of the drive motors of the switch disconnectors)
zPossibility to evaluate the message "Tripped" initiated by circuit breakers.
zInternal functional testing including checking of the changeover times
zCommunication with remote alarm indicator and test combinations and TM… alarm indicator
and operator panels as well as with other components of the SCADA system via BMS bus
zPossibility to set the time delay for the changeover in 50 ms increments for adaptation to the
total off-time according to DIN VDE 0100-710 (VDE 0100 Part 710) section 710.537.6.2.k) resp. to
the return transfer time according to DIN VDE 0100-710 (VDE 0100 Part 710) section
710.537.6.1.f)
zCan be used in systems in accordance with DIN VDE 0100-710 (VDE 0100 Part 710) section
710.564.6 with a changeover period of ≤15 s or ≤0.5 s, depending on the circuit-breaker or
switch disconnector.
zPossibility to monitor the N conductor (optional)
zGenerator operation with a generator test input and a generator start-up output (option, see
chapter “8.5 Ordering information”)
– In normal operation, the message "Failure line 2" is suppressed.
– Start-up command for the generator in case of failure of line 1.
– Input for generator test. The generator starts up after closing the switch. Changeover to line
2 takes place as soon as the voltage is stabilised.
