Alpha Technologies APX Series Manual del operador descargar pdf (Pagina 11)

1.4 Optional Features

APC (APL) Series non-standby power supplies can also be equipped with the

following options:

1.4.1 SIL-C (Status Indicator LED)

The Status Indicator LED (red) indicates that the APC (APL) is supplying AC output

to the load. The long-life LED pilot lamp can be viewed from outside the enclosure.

As long as power is present at the modules output, the lamp remains ON. This acts

as a simple form of status monitoring by allowing the technician to check the status

of the power supply’s output without having to open the enclosure.

1.4.2 LA-M (Plug-in Lightning Arrestor)

The LA-M consists of a 350 joule, Metal Oxide Varistor (MOV) for primary site

protection. The LA-M, which is enclosed in a plastic housing, plugs directly into a

dedicated receptacle eliminating the need for additional wiring. This option provides

additional protection from voltage spikes caused by lightning and other power

disturbances. The LA-L (120VAC) and LA-L E (230VAC) option, which must be

hard-wired onto the input block, is available for the APL Series of non-standby power

supplies.

NOTE: The LA-E is available for 230 VAC applications. This model is housed in an

aluminum enclosure and must be hard wired into the APC.

1.4.3 *AMM-C (Ammeter)

The AMM-C Ammeter displays the output current to the load. It is also useful as a

status indicator: A zero reading would indicate that no output current is being drawn

by the load, a pegged meter would indicate a short circuit condition in the plant.

1.4.4 *TDR-M (Plug-in Time Delay Relay)

When the AC utility line voltage returns after a power outage, the AC line voltage

may not stabilize for several seconds, and could contain noise spikes and other

transients. The TDR-M delays power to the output from 10 to 60 seconds, thereby

reducing these transients associated with the start-up of utility power after an outage

has occurred.

1.4.5 *ACAT-3P (Plug-in Amp Clamp)

The ACAT-3P Amp Clamp is designed to protect active and passive equipment from

voltage surges and transients. The plug-in Amp Clamp consists of two rugged

SCR’s (silicon controlled rectifiers) connected in an inverse parallel configuration

with a steady state current of 35 Amps and a one cycle (8 ms) pulse rating of 500

Amps. The SCR’s are triggered into conduction whenever the Amp Clamp’s

bidirectional trigger diodes senses the presence of voltage transients exceeding

104-115 Volt 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.

1. INTRODUCTION

* These options are not available for the APL Series of non-standby power supplies.

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Alpha Technologies APX Series Manual del operador Pagina 11