YD/T 2165-2010Technical specification of modular uninterruptible power systems for telecommunications (English PDF)

3.1 Modular uninterruptible power system

It is composed of input distribution, output distribution, power module, and

control module. The modules are possessed of the following properties.

– Have independent mechanical framework;

– Have complete and independent function;

– The modules shall work cooperatively.

3.2 Power module

It includes rectification, inversion, charging (optional), power factor correction,

and relevant control circuits. As the main module of the UPS system, the power

module has hot swapped function and parallel redundancy operation function

under the normal operating mode of the UPS system.

3.3 Control module

It shall be responsible for the real-time monitoring of the operating mode of the

UPS system as well as the collection and storage of the operating parameters,

5.5.3 Output overload protection of power modules

When the power module's output exceeds the rated load, the UPS system shall

give an audible and visual alarm; when the power module's output exceeds its

overload capacity, EXIT the UPS system; when all the power modules in the

UPS system exceed the overload capacity, SWITCH to bypass for power supply.

5.5.4 Over-temperature protection

When the internal temperature of the power module comes up to the protection

settings, the power module shall be able to automatically give an alarm, exit the

system for protection, and return back to the operating mode after

troubleshooting.

5.5.5 Low battery voltage protection

When the UPS system is in battery inverter mode, and the battery voltage

reduces to the protection point, the UPS system shall give an audible and visual

alarm, and the battery shall stop providing power supply.

Note. When the mains power supply recovers after the shutdown caused by battery discharge termination,

users can set whether the system can automatically restart.

5.5.6 Output over-voltage and under-voltage protection

When the inverter output voltage of the UPS system exceeds the over-voltage

and under-voltage set values, the UPS system shall give an audible and visual

alarm, and shall switch to bypass for power supply.

5.5.7 Module fuse (or breaker) protection

The main circuit of the power module shall set fuse (or breaker) protection, so

as to restrict further expansion of certain faults.

5.5.8 System fuse (or breaker) protection

The AC main input, bypass input, and AC output of the UPS system shall be

respectively equipped with fuse (or breaker), and other protective equipment.

5.6 Fan fault alarm

The UPS system shall give an audible and visual alarm when the fan breaks

down.

5.7 Lightning protection performance

The lightning withstand current ratings and technical requirements of the UPS

5.15.3.1 The touch current of the UPS system's protective earth (PE) to the

input neutral (N) shall not be greater than 3.5mA.

5.15.3.2 When the touch current is greater than 3.5mA, the effective value of

the protective conductor current shall not exceed 5% of the input current per

phase. If the loads are unbalanced, USE the maximum among 3 phase current

values for calculation. On the large current path of the protective conductor, the

cross-sectional area of the protective conductor shall not be less than 1.0mm2.

SET warning or similar signs at the primary power connection terminal close to

the equipment.

5.16 Reliability

5.16.1 Module MTBF

Under normal environmental conditions for operation, the module mean time

between failures (MTBF) of the UPS system shall not be less than 5 × 104h

(without storage batteries).

5.16.2 System MTBF

Under normal environmental conditions for operation, the mean time between

failures (MTBF) of the UPS system shall not be less than 1 × 105h (without

storage batteries).

5.16.3 System MTTR

Under normal environmental conditions for operation, the mean time to repair

(MTTR) of the UPS system shall not be greater than 0.5h (without storage

batteries).

6.1 Appearance and structure

The equipment appearance and structure visual inspections shall conform to

the requirements specified in the Section 5.2 of this Standard.

6.2 Input voltage range

The test circuit is shown in Figure 1.CONNECT the input with the rated linear

load. Respectively ADJUST the AC input voltage to the upper and lower limits

specified in Table 1.The UPS system can operate normally, and the output

voltage shall not exceed the value specified in Table 1 in the process of input

voltage adjustment.

and frequency of the UPS system to the rated values. Respectively CONNECT

the output with 50% and 100% rated non-linear loads. In normal operating

mode of the UPS system, USE a power harmonic analyzer to measure...

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