User Manual

ACCU AC Connection Unit
3 Function Description
This section describes the functions of the following ACCU parts:
•BasicUnit
• Connection Box
The figure below shows a block diagram of both parts in the ACCU.
P003416A
Earth
Fault
Breaker
ECU
Overvoltage
protectors
ACCU 2102
Circuit
breakers
and control
Main
Switch
Service
Outlet VAC
ECU
supply 24 VAC
PSU+Climate
230 VAC
Basic Unit
Connection Box
AC
Supply
Figure 1 ACCU Block Diagram
3.
1
Ba
sic Unit
The main parts of the Basic Unit are the following:
•Fi
ve 16 A, 2-pole circuit breakers for the PSUs and climate unit
• Service outlet with a 10 A, 2-pole circuit breaker and an earth fault protector
• Printed Board Assembly (PBA) equipped with relays for operation of the
AC power to the rectifiers, undervoltage detector and transformer (+24 V
AC
to the ECU)
3.2 Connection Box
Th
e main parts of the Connection Box are the following:
• Terminal block for incoming AC cable
• 4-pole (line and neutral) Main Switch for connecting and disconnecting AC
power to the cabinet
• Four overvoltage arrestors (OVPs)
5(8)
EN/LZT 720 0231 Uen R1A