Figure 44 - Locking Handle Disengaged/Engaged - Alpha Technologies AMPS HP2 Power System Installation & Operation Manual

6.5.9 Start Delay
The rectifier modules are equipped with a delay timer to stagger-start a series of modules. When multiple mod-
ules and multiple shelves, part of a larger system are used in conjunction with a controller, a start delay prevents
all rectifiers from starting at the same time and causing an inrush on the utility. The default start delay is set to 1
second and can be adjusted up to 250 seconds on the CXC HP controller. The built-in timer delays the switching
ON of the module by the start delay interval (up to 250 seconds), which is set in the CXC HP.
6.5.10 Current Limit/Short Circuit Protection
The current limit function determines the maximum output current limit of the rectifier module, regardless of the
output voltage or power. The maximum output current is limited to a constant value down to a short circuit condi-
tion. Current limiting can be used to mate the rectifier output current ampacity to the needs of the load and paral-
lel battery to minimize excessive battery recharge currents.
The rectifier will sustain a continuous short circuit at the output terminals. The maximum short circuit current will
not exceed 50A per module.
6.5.11 Power Limiting
Each rectifier module is designed to limit the power output to the module specification. This enables more current
to be supplied at lower output voltages, and allows matching the output power to the demands of constant-power
loads often seen in telecom equipment. This feature can also be used for a faster recharge of flooded batteries
paralleled with the load.
NOTE:
The current limiting feature overrides the power-limiting feature.
6.5.12 High Voltage Shutdown (HVSD)
This feature protects the load from over-voltages originating in the rectifiers. The offending rectifier module is shut
down when a high output voltage condition occurs. The red Alarm (Module Fail) LED will illuminate. The module
will restart automatically. However, if more than three over-voltage conditions occur within one minute, the module
will latch off and remain shut down until it is reset by restarting the rectifier via the CXC HP.
6.5.13 Battery Eliminator Operation
Rectifier modules maintain all specifications (except where indicated) with or without a battery or a DC source at-
tached in parallel to the output. Under these conditions there will be no monitoring or control activity if AC power
failure occurs.
6.5.14 Mechanical
An integral handle provides a means to both insert and
remove the rectifier as well as locking the rectifier in place.
Figure 44 — Locking handle disengaged/engaged
0260080-J0 Rev D
64