Embraer EMB145 Operation Manual page 1702

GENERAL
The electrical power system supplies AC and DC voltage for all loads
during normal or emergency operation.
Two different types of sources provide electrical power supply:
DC Power
AC Power
The DC power system supplies 28 V DC for all airplane electrical
loads and recharges the batteries. It is the primary electrical power
supply system. The DC power system is comprised of:
Four independent generators (28 V DC/400 A/engine driven).
One APU starter-generator (28 V DC/400 A).
Two Nickel-Cadmium batteries (24 V DC/44 Ah/1 hour rate).
One lead-acid backup battery (24 V DC/5 Ah/10 hour rate).
External power source.
AC power is supplied by one 250 VA/400 Hz single-phase static
inverter, which converts 28 V DC into 115 V AC.
A dedicated page on the MFD (electrical page) provides, on request,
information regarding system configuration, load and voltage
conditions as well as battery temperatures. Furthermore, warning and
caution messages are presented on the EICAS to indicate an electrical
system failure.
REVISION 36
AIRPLANE
OPERATIONS
MANUAL
ELECTRICAL
Page
2-05-05 1
Code
01