Table of Contents
Advertisement
5.5.1. Terminal Block Labeling
Note: Your Centurion III Load & Battery Terminal Blocks may be labeled
differently than shown in photos on the following page. Some Centurion III
shelves' terminal blocks are identified by Numbers which are the Live or Hot
terminals and the words Batt. Common or Load Common which are the Return
or Ground terminals – see polarity table below.
System Voltage
-48 VDC
5.5.2. Terminal Block Max Wire Size/Recommended Torque Specification
Connection
AC Input
AC Earth
Loads 1 – 12
Note: A larger breaker may be used even though in theory it may appear that the 2.5mm
wire is not fully protected. In fact, it is protected on two accounts. Firstly, it is protected
by the rectifier input fuse (which is only a short distance away). Secondly, the rectifiers are
power limited on their input. Therefore, they can never be overloaded. As a result, the wire
can never be over-loaded by the rectifier – it can only see fault current. As a result,
depending on local authorities, only fault current protection may be catered for by the
upstream protective device.
All live DC and Common connections are made to the connectors at the rear of the unit as
shown in Fig 2 and Fig 2.1.
For 1-8 load breakers 8AWG/10mm
10 AWG/6mm
2
terminals as shown in Fig 2 and Fig 2.1.
The battery terminals shown can accept cables up to 2 AWG/35mm
The internal battery cabling goes directly to the circuit breaker, then via a Low Voltage
Disconnect relay and current shunt to the internal live bus. This can be seen on the
wiring diagram at the rear of this manual & in Fig 5.
Ensure cables are strain relieved by utilizing the cable tie slots provided as shown in Fig 2.
5.6.
Alarm/Ancillary Cabling
Alarm and communication cables terminate directly
into the terminals of the Energy Manager. These
terminals are accessible by pulling the monitor forward
to expose connections as shown in Fig 3, Fig 3.1, Fig
3.2 & Fig 3.2a. When routing the cables, ensure they
are kept away from the AC and DC power cables when
possible.
5.7.
Temperature Sensors
Uncoil the battery temperature sensor tie wrapped to
rear of shelf and place in the middle of the middle
battery string. If the lead is not long enough, ordinary
2-core copper (approx. 18 AWG/0.75mm
Newmar • 1580 Sunflower Ave, Suite 100, Costa Mesa, CA 92626
Phone: 714-751-0488 • E-mail: techservice@Newmarpower.com
"Numbered' (AKA: Live or Hot)
-
Max AWG
8
2
8
2
terminals are used whereas for 9-16 load breakers,
2
) wire can
'Common' (AKA: Return or Ground)
+
Recommended Torque
10.5 in/Lbs.
22 in/Lbs.
10.5 in/Lbs.
2
.
Alarm/Ancillary Cabling
Temperature Sensor
11
Advertisement
Table of Contents
