Requirements for medium voltage switchgear in data centers

Composition of data center power distribution

Primary power input

Power grid/generator, 10/20/35kV

Secondary low-voltage distribution

Power access, UPS input, UPS output, cooling and other mechanical outputs

Level 3 IT power distribution

The power distribution unit (PDU) converts and distributes the electrical energy output by the UPS through a built-in transformer to meet the power requirements of different devices.

RPP (Remote Power Panel) for Distribution Head Cabinet

Rack PDU is located on the side or bottom of the cabinet to distribute power to each server

Dual power conversion switch cabinet

For data centers, medium voltage dual power supply is also an industry characteristic, which is assembled through three/four central cabinets

The specialized and customized integrated medium voltage ATSE can better meet customer needs. The compact 12kV dual power switch cabinet is equipped with normal/emergency power supply access, load output, and two side voltage transformers, which not only provide voltage measurement, but also serve as the power supply for circuit breaker operation. In conjunction with the capacitor tripping device, it can achieve smooth switching of power supply for circuit breaker opening when a section of the busbar fails and the induced voltage of the voltage transformer drops, which cannot drive the opening coil. The miniaturized vacuum circuit breaker integrated with intelligent microcomputer protection unit enables the switch cabinet to achieve short-circuit protection without the need for comprehensive protection, and the quick opening and network locking functions achieve safety protection.

DC application

With the rapid development of data centers, the energy consumption problem of data centers has become increasingly prominent. A reasonable and reliable data center power distribution system solution is a reasonable way to improve the efficiency of data center power consumption and reduce equipment energy consumption. AC distribution requires a 5-step conversion from medium voltage, transformers, etc., while DC distribution uses DC converters to reach the server in only 2 steps. The energy loss of DC distribution is greatly reduced, and the safety and scalability are greatly improved.

Data center batteries and other equipment are charged using DC and used through medium voltage DC PDUs. PDU distribution cabinets are commonly used equipment in power systems and are often used in data centers, server rooms, and other situations that require efficient power supply. PDU distribution cabinets can have multiple output ports, each of which can provide power, and they can have safety protection functions when connecting any device.

The main function of a PDU distribution cabinet is to receive the transmitted power and distribute it to the equipment that needs electricity, in order to ensure the efficient and stable operation of equipment in data centers, server rooms, and other occasions. Due to the absence of direct current

DCCB is a critical equipment with a system voltage ranging from kilovolts to several hundred kilovolts.

The capacity and reliability of medium voltage DC circuit breakers cannot meet the requirements of new distribution system applications, and high-speed mechanical switches require higher rated currents and transient arcs. The reliability and cost of power electronics applications, insulation degradation suppression in DC breaking, and increasing breaking capacity through current limiters.

Integrated power module, solid-state transformer medium voltage input

Incoming line isolation, circuit breaker measurement protection, indoor single-layer, front incoming line maintenance, load switch fuse combination, isolation switch+circuit breaker, withdrawable circuit breaker scheme, air insulated and gas insulated switchgear. Connection and maintenance in front of the cabinet, gas insulated switchgear, maintenance free, intelligent control, equipped with visible observation windows for isolated fractures.

Gas and diesel generator supporting switchgear

Generator outlet circuit breaker switchgear, fixed circuit breaker switchgear or withdrawable circuit breaker switchgear, with current transformers and voltage transformers before and after the circuit breaker. Neutral point system switchgear, neutral point current transformer, grounding transformer, grounding resistor. It is required to be installed near the generator, in a vehicle mounted outdoor switchgear, or inside a prefabricated warehouse, with a compact structure, easy operation and maintenance, and strong environmental applicability