Alpha Technologies APX Series - Manual (Page 12)

12 016-030-B0-005, Rev. C
1.0 Introduction, continued
1.3 Optional Features
You can equip the APX Series with the following options.See Section 2.10, for installation
instructions.
Option Description Part Number
GLK
Enclosure Locks Security lock for pole mount enclosures. PM models are
equipped with a security hole to accomodate a standard
padlock. GLK-PED: 740-263-22;
GLK-PM: 744-229-21
LA-M
Plug-in Lightning Arrestor
LA-E (230VAC)
The LA-M is a 350 joule, Metal Oxide Varistor (MOV) for
primary site protection. It provides protection from voltage
spikes caused by lightning and other disturbances. The
LA-M is enclosed in plastic housing and plugs directly into
a dedicated receptacle, eliminating the need for additional
wiring.
LA-E housed in an aluminum enclosure and must be hard
wired into the APX.
LA-L120V: 744-173-20;
LA-E240V: 744-174-20
LA-P+120V:020-098-24
LA-M120V: 020-116-21
(x2 for 240V)
SIL-C
Status Indicator LED Indicates that the APX is supplying AC output to the load
and can be viewed from outside the enclosure. The light
(red) remains ON as long as power is present at the
modules output. 740-239-21
The following options are available for the APX Series power supplies only
AMM-C
Ammeter Displays the output current to the load. It is also useful as a
status indicator: a zero reading indicates no output current
is being drawn by the load, a pegged meter indicates a
short circuit condition in the plant. 10A :
740-238-21
15A :
740-238-22
15A:
(9015 only)
744-594-20
TDR-M
Plug-in Time Delay Relay In the event of a AC utility line outage and subsequent
voltage return, the TDR-M delays power to the output for 10
to 60 seconds, thereby providing time for the line voltage
to stablize and reducing possible noise spikes and other
transients. 60V:
020-114-21
90V:
020-114-23
ACAT-3P
Plug-in Amp Clamp Protects active and passive equipment from voltage surges
and transients. Provides “Crowbar” clamping protection
from voltage spikes in excess of 104V.
Consists of two rugged SCR’s (silicon controlled rectifi ers)
connected in an inverse parallel confi guration with a steady
state current of 35A and a one cycle (8 ms) pulse rating of
500A. The SCR’s are triggered into conduction whenever
the Amp Clamp’s bidirectional trigger diodes senses the
presence of voltage transients exceeding 104-115V peak
threshold. The fast response trigger circuit gates the
appropriate SCR ON (in nanoseconds) to shunt the surge
current to ground, effectively protecting sensitive equipment
from transient overvoltage conditions.
60V:
020-115-21
90V:
020-115-23
Table 1-2, Optional Features