
Introduction
– continued
Apr 2001
V02.03
29
SC
TM
4812ET RF and Power Cabinet Hardware Installation Manual
DRAFT
Battery Compartment Fan
The battery compartment fan provides air circulation for the two battery
compartments. It is located on the inside of the battery compartment
door.
Heat Exchanger
The Heat Exchanger provides cooling to the rectifier compartment of the
Power Cabinet. The Heat Exchanger is located in the primary front door
of the Power Cabinet.
Rectifiers
The +27V rectifiers convert the AC power supplied to the Power Cabinet
to +27V DC to power the RF Cabinet and maintain the charge of the
batteries.
AC Load Center (ACLC)
The ACLC is the point of entry for AC Power to the Power Cabinet. It
incorporates AC power distribution and surge protection.
Punch Block
The Punch Block is the interface for the alarm signalling between the
Power Cabinet and the RF Cabinet.
Enclosure Dimensions
Table 1-5 show the dimensions for the SC 4812ET RF and Power
Cabinet enclosures.
Table 1-5: Cabinet Dimensions
Height
Width
Item
Depth
Weight (Max)
1677 mm
(66”)
1423 mm
(56”)
SC4812ET RF Cabinet
915 mm
(36”)
680 kg
(1500 lbs)
1677 mm
(66”)
1423 mm
(56”)
Power Cabinet
965 mm
(38”)
1590 kg
(3500 lbs)
The primary front door of the RF Cabinet and both front
doors of the Power Cabinet are removable. The depth of
the cabinets with the door(s) removed is 711 mm (28”).
NOTE
1