10. Manual By-Pass (Optional)
Manual By-Pass has to be operated by trained people only.
When system is in manual by-pass the load is subjected to mains voltage without active filtering. Output alarm is
activated when system is in manual by-pass.
The Manual By-Pass cannot be operated remotely.
The Manual By-Pass can be integrated into the CE+T cabinet if requested at time of order. A Manual By-Pass purchased
separately must comply with the instructions within section 10.3, page 35.
10.1 Pre-requisites
Commercial AC power must be present, and the inverter must be synchronized with it, before operating MBP. The
upstream commercial breaker must be correctly sized to accept the overload, and if the AC is supplied by a Gen-set, the
minimal required power will be twice the nominal power of the inverter.
The inverter may be overloaded during the MBP procedure, depending on voltage network and output. Inverter voltage
setting: to reduce the impact of an overload, the inverter power and current will be reduced from 150% to nominal value.
The by-pass switch disconnects all AC voltage on the shelves but has no effect on the DC feeding the converter and the
remote alarm terminal.
It is requested in order to reduce the inrush current during manual by pass operation to adjust the converter AC output
voltage to the same value as AC input voltage. If the difference between AC input and AC output voltage exceed 5 Vac,
there is a risk of shut down of inverter due to high inrush current during the return to normal operation from Manual By
Pass engaged.
10.2 Manual By-Pass Operation
Manual Bypass operation creates a bypass from mains input via output AC distribution.
Converter modules are bypassed and possible to disconnect without impacting the load.
Manual By-Pass operation is “Make before Break” logic.
10.2.1 Normal to By-pass (Engage MBP)
1. Rotate the MBP Switch (S1) from
NORMAL
to
BYPASS
.
(Do not stop at INTERIM Position)
2. Switch OFF the DC power and/or disconnect batteries..
Manual By-Pass puts the module in OFF state but doesn’t disconnect the DC. Make sure DC is disconnected before
any intervention inside the system.
Warning: Risk of electric shock. Power will be available at AC Input terminal, AC Output terminal, DC Input terminal,
and Surge Arresters.
Manual By-Pass (Optional)
34
- Bravo 10 - 48/230 - User manual - v1.2
Summary of Contents for Bravo 10 - 48/230
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