Scope of application

The YH-XL series microcomputer based AC (inverter) power supply panel is suitable for operation and control power supply in power plants, substations, electrified railways, industrial and mining enterprises, relay protection, automatic devices and other fields The microcomputer based AC (inverter) power supply screen adopts a dual power switching device for AC input, with online and zero conversion functions If there is an abnormality in one power supply, automatic switching between power supplies will be carried out to ensure the reliability of power supply When the mains power is normal, single-phase 220V AC (or three-phase 380V) is isolated, rectified and filtered to supply power to the inverter. If the AC is turned off, the DC screen of the power system supplies power to the inverter through anti reverse diodes, and then supplies power to important loads after output isolation; If the DC screen loses power, it will still be powered by the AC input; If the inverter is overloaded or faulty, it will be switched to bypass power supply by the static switch.

System features

● Improvement in power supply quality By using dual isolation of input and output and dual transformation working modes, the output becomes a standard orthodox waveform with stable voltage and frequency

● It has a power outage protection function. If the input power supply is disconnected, the inverter is powered by the DC screen of the power system (DC110/220V), and the load power supply is uninterrupted

● Effectively resist noise Due to the use of isolation transformers and AC-DC-AC conversion methods, the noise in the input power supply is effectively filtered, resulting in a pure orthodox wave power supply for the load

Internal installation of anti reverse diodes can prevent the DC bus voltage from being higher than the DC input side voltage and backflowing to the DC screen, thus protecting the DC screen

Isolation between AC bus and DC bus Completely shielding the mutual influence between the AC bus and the DC bus

● It has multiple alarm methods, including sound, light LCD、 The input/output contacts and communication transmission methods provide timely, accurate, and detailed prompts for current alarms, improving system reliability while helping maintenance personnel accurately and quickly locate and troubleshoot faults

● It has input reverse connection, undervoltage, overvoltage, output overload, short circuit, and overheating protection functions

● An accident lighting switching circuit can be added.

Equipped with RS232/485 communication interface, it can communicate with the upper computer and achieve "four remote" unmanned operation

System technical parameters

● DC input: Rated voltage: 220V DC/110VDC

● AC input: Rated voltage: 220V AC single-phase/380VAC three-phase

Voltage allowable range: 220VAC ± 15% single-phase/380VAC ± 15% three-phase

● AC output: Voltage accuracy: 220V ± 3%

● Overload capacity: 120%,10min

Inverter efficiency: 85% (80% resistive load)

● Protection function: Input reverse connection, undervoltage, overvoltage protection, output overload, short circuit, overheating protection

● Dimensions (mm)

● Height x Width x Depth: 2260 x 800 x 600 or 2360 x 800 x 550