UMC710D4_D00379_00_M_XXEN / 01.2020 19
MEDICS® UMC710D4-..HA
4
Commissioning, setting and testing
i
Communication via the BMS bus can only be guaranteed when there is only one terminating
resistor at the beginning and the end of the BMS bus. Additional terminating resistors can lead
to malfunctions and therefore must not be used. Please also note the information in the „BMS
bus“ instruction leaflet.
4.1
Setting and testing according to the checklist
A total changeover period of t ≥ 0.8 s for modules with I
e
≥ 160 A and switching back within five
seconds to the preferred supply on voltage recovery is factory set.
The response time t(off), the idle time t(K1-2) and the return transfer time t(on) of the MEDICS®
module can be set and must be adjusted in line with the requirements of the specific application,
the short-circuit calculation and the requirements of IEC 60364-7-710:2002-11, sections 556.5.2.2,
556.7 and 556.8 and DIN VDE 0100-710 (VDE 0100 Part 710):2002-11, section 710.537.6 (automatic
changeover modules).
• The total off time permitted to occur (from the point at which the fault occurs until the
arc in the overcurrent protective device is cleared) must be less than the minimum time
delay for the changeover process of the automatic changeover module.
Setting: Response time t(off)
• If several changeover modules are connected in series in a power supply system, it is re-
commended that they be time-graded.
Setting: Response time t(off), idle time t(K1-2) and return transfer time t(on).
• As part of the response delay (to be custom-set), you must, at the very least, take into ac-
count the periods of time when the circuit experiences short interruptions, and the res-
ponse times of the short-circuit protective device connected upstream or downstream.
Regardless of this, the idle time for the changeover process corresponding to the place
of installation must be considered to prevent switching overvoltages.
Setting: Response time t(off) and idle time t(K1-2).
For this purpose, please consult the changeover time lapse diagram in the instruction leaflet for
the PRC487 control device and make the settings required according to the description.
chapter „Manufacturer‘s certificate, checklist, circuit documentation“.
This list details the factory settings and the system-specific settings for the MEDICS® module.
Please carry out all the work outlined in the list and log each test step.
The checklist contains:
• Visual inspection
• Commissioning, settings, factory settings
• Functional test
Keep this checklist with this manual in a location that is close to the MEDICS® module.
