Rectifier charger

Modular-type low voltage converters (ZVU-M) are designed to receive alternating current electrical energy, convert it into direct current electrical energy, charge various types of stationary storage batteries, and power the load both in a buffer with and without a storage battery.

ZVU-M are based on high-frequency units and allow to optimally calculate the design of the ZVU. Modular and hot-swappable design meet the most demanding power system requirements, including N + 1 rectifier unit redundancy and easy expansion of existing systems.

Rectifier charger PERFORMS THE FOLLOWING FUNCTIONS:

• Reliable power supply of DC power consumers;
• Power supply of relay protection circuits, automation and tele mechanics, remote control equipment, emergency and warning alarm system;
• Charging and recharging of storage batteries (SB) in the following modes: maintaining the SB charge with stabilized voltage, accelerated AB charge, equalizing the AB charge;
• Thermo compensation of the battery charge (control of the output voltage of the rectifiers depending on the temperature);
• Control of voltage deviations at the input and output;
• When the supply voltage disappears and is subsequently restored, ZVU-M automatically restore all modes of operation and maintain the parameters set before the disappearance of the supply voltage;
• Measurement of insulation resistance with the formation of warning and alarm signals when it drops (option);
• Inclusion of power modules for parallel operation and equalization of module currents;
• Digital indication of the parameters of the supply network, power modules, SB and load; identification of emergency states of modules;
• Formation of signals "EMERGENCY" on "dry contacts";
• Keeping a log of accidents;
• Data transmission using one of the following protocols: a) Modbus RTU, RS-485 interface; b) Modbus TCP / IP (open communication protocol); c) IEC 60870-5-104 (specialized protocol "Tele mechanics devices and systems", "Transmission protocols", option); d) IEC 61850 (specialized protocol "Communication networks and substation systems", option).

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