GENERAL CONSTRUCTION
The construction of the charger is based around a substantial fabricated steel cabinet, which includes a reinforced floor area where the mains transformer is bolted down, a gland plate position and a series of ventilation slots in the floor. Internal chassis are located on either side of the cabinet, with provision for four chassis in total, allowing for 2 independent charger systems in one cabinet. The front and back panels are interchangeable, one is a blank, the other holds the front control panel in a recessed position. Provision is made for up to two cooling extraction fans to be fitted, blanking plates are used where fans are not required.

CABINET FINISH
The cabinet is finished in gloss powder coat, but other finishes are available, particularly for outdoor applications. Shot-blast and Zinc spray followed by painting/powder coating is standard for all outdoor applications.

TRANSFORMERS & CHOKES
Transformers and chokes are conventional air-cooled laminated types, all rated for 100% continuous output. Cabling is generally Def-Stan 61-12 Type 3 for smaller signal cables, or Tri-Rated types for heavier current. CSP-Sheathed welding cables are also used where their extra flexibility is used to prevent undua strain on terminals and components.

CONTROL ELECTRONICS
Control PCB's are the tried and approved Prepair CVT552 series, either in single or three-phase configuration. Thyristor stacks are fan-cooled where required, with high-quality long-life ball-bearing fans and substantial aluminium extruded heatsinks.

AVAILABLE OUTPUT POWER
Output voltages and currents up to 20kW DC are available in this cabinet, up to 30kW in the extended height version. The unit shown is 110V DC output at 50A/100A switchable output current.

OUTPUT PROTECTION
Output controlled by DC contactor, with overvoltage output shut-off as standard, and control switch and emergency stop wiring loop for external control if required. Output indicator lamp on top cover.

REMOTE CONTROL STATION
The charger can be used with a remote control station, which has its own metering, controls for output ON/OFF and current switching, plus an emergency stop switch to allow shutdown of the charger.

INPUT PROTECTION
Input protection is by MCB with isolation switch, output protection is by HRC fuse. Input terminals are Klippon ST5, Output terminals vary with output current.

INDICATORS
Indicators are provided for AC ON, CHARGE, INHIBIT and FAULT. Volt-free contacts for various alarm/fault functions are available for customer use. A top indicator is provided to show that the charger is connected to the battery, and also this indicator flashes should a fault develop, in which case the output is disconnected.

Contact us: Phone: +44 (0) 1933 356666 Fax: +44 (0) 1933 355557 Email: prepair@easynet.co.uk
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