Mains Power Connection - Bosch PRAESENSA Manual

PRAESENSA
4.
5.
Battery cables
Battery cables are packed with the PRA-MPS3. These are heavy duty red (N) and black (O)
cables of 120 cm length, with a cross section of 35 mm
crimp eyelet terminals attached.
3.7.5

Mains power connection

1.
2.
Notice!
i
The power cord with a plug can be used to disconnect the PRA-MPS3 from the mains.
Connect the plug to an easily accessible power outlet so that the plug can be removed from
the outlet at any time. Be sure to allow enough space around the power outlet.
3.
Caution!
Only replace with a fuse of the same type, certified for UL 248.
!
Bosch Security Systems B.V.
Connect the open end of the black cable (O) to the negative battery terminal, with the
eyelet of the temperature sensor (J) on top. Depending on the type of battery and its
terminals, use a short M8 bolt (P), spring washer (R) and washer (S), or short M6 bolt
(T), spring washer (V) and washer (W).
– M8 and M6 are the most common screw terminal types for VRLA batteries in PA/VA
applications. Check the battery specification for the optimum tightening torque.
Connect the open end of the red cable (N) to the positive battery terminal using a short
bolt, spring washer and washer (M8: P, R, S / M6: T, V, W). Tighten with the correct
torque, according to the battery specification.
Check that the mains (AC) power supply meets the nominal input rating of the PRA-
MPS3.
Use the supplied power cord (I) to connect to the mains line.
– The PRA-MPS3 has no power switch.
– Plug unit into a permanent power outlet inside the rack enclosure.
The mains inlet has a built-in fuse T10AH 250V.
– The T‑characteristic of this 10 A fuse refers to how rapidly it responds to various
current overloads. This is a slow-acting fuse (Time‑lag) that has additional thermal
inertia, designed to tolerate normal initial or start-up overload pulses.
– The H‑characteristic of this 10 A fuse refers to being a High breaking fuse type.
– Because the fuse is only connected in line with one of the mains conductors (L or N),
never use the fuse as a means to interrupt the mains in case of service. Pull out the
C13‑connector of the power cord to disconnect the mains.
Underwriters Laboratories Listing Document (ULLD)
Installation wiring | en
2
(approximately AWG 2) and with
2021.12.21 | V0.15b | F.01U.402.882
71