Controlled ferroresonant float rectifiers have many inherent advantages: voltage regulation, short circuit protection, low operating costs (a combination of high efficiency and high power factor), easy maintenance and high reliability.

The ARE Series of float rectifiers combines these inherent advantages with advanced rectifier, control and filter circuitry, and user-oriented packaging.

Designed specifically for utility and communication applications, the ARE Series rectifiers are easily adjusted to meet your specific operating requirements and will provide years of low-maintenance service.

• High-voltage shutdown
• Flush-mounted, voltmeter and ammeter, 3.5in (89mm) case, two percent accuracy
• Float and equalize potentiometers with equalize switch
• AC power failure alarm relay
• AC on lamp

• Door opens approximately 180 degrees for easy access to interior
• The control board is mounted on the rear of the door for easy access
• Serviceable components are accessible and removable from the front
• Input and output connections are easily accessible
• Knockouts for cables are provided
• Clear space is provided in floor area for bottom entrance
• Cabinets can be relay rack, wall or floor mounted

• No-charge alarm – load sharing
• High- and low-voltage alarm
• High DC voltage alarm with adjustable time delay
• Ground detection alarm
• 0 to 255-hour equalize timer
• Blocking diode
• Lightning protection device
• 1 percent meters
• Remote temperature probe with temperature compensation circuitry for 48-volt and 130-volt models
• 50 Hz ratings

24V-Output


48V-Output


130V-Output


Typical Cabinet Dimensions
 

• 17-inch (432 mm) wide cabinets can be used in 19-inch (483 mm), 23-inch (584 mm) or 30-inch (762 mm) relay racks
• 20.5 inch (521 mm) wide cabinets can be used in 23-inch (584 mm) or 30-inch (762 mm) racks only
• Rack angles mount at rear for wall mounting
• Floor brackets are available for all models instead of relay rack mounting angles when ordered with charger

Input
All transformers are dual wound for either 120, 208, 240 volts (-12, +10 percent) or for 208, 240, 480 volts, single phase, 60 Hz ±5 percent.

Regulation
DC voltage is maintained within ±1/2 percent at any load from no load to full load with ±10 percent variation (or ANSI standard ranges) in the AC input voltage while floating rated number of cells.
Control is accomplished with a single control board with operation on or off a battery.
During operation, the maximum output voltage transient does not exceed 5 percent of the initial steady-state voltage for sudden load changes between 20 percent and 100 percent of rated output. Recovery takes less than 200 milliseconds. Operation off the battery is stable under all conditions of line and load (within stated limits). Turn-on under all conditions of line and load has a “soft-start” characteristic without overshoot.

Electrical Noise
For 24- and 48-volt models, the filtering provided produces a ripple level of less than 30 millivolts rms with electrical noise less than 22 dBrn with C message weighing on a type 3A noise measuring set when connected to a battery with an eight-hour capacity rating of four times the rectifier current rating. For 130-volt models, the filtering provided produces a ripple level of less than 30 millivolts rms when connected to a battery with an eight-hour capacity rating of four times the rectifier current rating. The total dynamic response of the control circuitry permits all ARE rectifiers to operate as power supplies (at increased ripple levels) when the batteries are removed for service.

Current Limiting Circuit
The current limiting circuit is factory set at 110 percent of rated DC output but can be adjusted down to 90 percent and up to 125 percent for intermittent duty up to two hours.

Float and Equalize Voltages
To accommodate different battery types, both the float and the equalize voltages are continuously adjustable (no taps) over the nominal voltage range (24-volt; 24-30V; 48-volt models; 48-60V; 130-volt models; 120 145V). 24-, 48-and 130-volt models can be equipped with a float voltage compensation circuit, which can be connected up to 10 feet from charger. The temperature compensation circuitry will correct both the float and equalize voltages by 2.0 mV per degree F per cell [added for temperatures below 77F (25C) and subtracted for temperatures above 77F (25C)].

Circuit Protection
A two-pole shunt-trip AC circuit breaker is provided for input protection. A two-pole DC circuit breaker is provided in the output. An AC power failure alarm relay provides Form C contacts, which operate in the event of an AC failure.

Ambient Operating Temperatures
All ARE rectifiers will operate at 110 percent of rated DC output, continuously in temperatures from 32F to 122F (0C to 50C). These units can be safely stored for up to one year at temperatures ranging from -40F to 185F (-40C to +85C).

Battery Eliminator Operation
All ARE rectifiers will operate as a power supply without a battery at the following ripple levels:

• 24- and 48-volt models (“E” suffix) less than 30 millivolts rms
• 130-volt models (“F” suffix) less than 100 millivolts

Float Voltage Temperature Compensation Circuit
For single-phase, 24-, 48-, and 130-volt ARE chargers (50 or 60 Hertz)

• Extends battery life
• Wide temperature range
• Rugged, shock-resistant design
• Unaffected by severe environmental exposure