EN 62040-5-3-2017 pdf download.Uninterruptible power systems (UPS) – Part 5-3: DC output UPS – Performance and test requirements.
This test is required for DC UPS incorporating parallel redundancy. The test shall be conducted with rated load applied to the DC UPS. By failure simulation, the redundant functional units and DC UPS unit as applicable shall be made to fail (for example semiconductor failure). The output voltage transient shall be measured and shall comply with the manufacturer’s declared limits. Both high and low impedance failures in redundant DC UPS shall be considered. Low impedance failure mode should be simulated by shorting an appropriate power semiconductor in the redundant DC UPS High Impedance failure mode should be simulated by opening the connection to an appropriate power semiconductor in the redundant DC UPS.
Compliance is verified when the dynamic output performance remains within the limits of the performance classification declared in 5.3.2 a) during this event.
6.4.3 Output characteristics — Constant power load
The requirements for constant power load are deferred for future consideration.
6.4.4 Stored and restored energy
6.4.4.1 Stored energy time
The stored energy time shall be determined by switching off the AC input to the DC UPS operating at rated power and measuring the duration that the specified output power is maintained.
Assuming that the energy storage device is a battery, subject to any particular agreement between the purchaser and the DC UPS manufacturer, the reference temperature of the battery shall be 25 C. The temperature of the battery bank shall be measured Immediately prior to the test for the purpose of calculation of any adjustment to the expected stored energy time.
NOTE I Smlar consederahon applies for other stored energy technoIoges.
The battery voltage shall not fall below the cut-off voltage specified before the stored energy time has elapsed.
Before carrying out this test, operate the DC UPS In normal mode of operation with nominal input supply and no output load applied for a period in excess of the manufacturer’s stated restored energy time.
Apply a 100 % resistive reference load and interrupt the input supply to force stored energy mode of operation. Record the DC UPS output voltage. Wait for the declared duration of the stored energy time. Record the DC UPS output voltage.
Compliance is verified when the ripple current measured is equal or lower than that the value specified by the battery manufacturer— see 5.4.2.2j).
NOTE As an example the limit for AC component (RMS value) of the battery current is typIcally 5 % of the numerical value of the rated Ah batt.ry capacity (lead.acid) and 10% (NiCdj.
6.4.4.4 Restart test
Automatic or other restart means shall be tested after a complete shutdown of the DC UPS The DC UPS restart test shall assess that proper mains voltages are present or that the energy storage device has been depleted and automatically restarted into normal mode
Compliance is verified when the DC UPS normal mode of operations is returned per manufactures design criteria.
6.5 Type test procedure (environmental)
6.5.1 Environmental and transportation test methods
6.5,1.1 General
The following tests are intended to simulate the environmental and transportation requirements the DC UPS is designed to meet. The transportation-related tests assess the construction of the DC UPS in the shipping container against resistance to damage by normal handling operations during transportation.
6.5.1.2 Shock test
The following steps shall be carried out on a completed DC UPS with a mass less than 50 kg, excluding the transportation packaging and in the chronological order below:
a) as initial measurements, perform the electrical routine tests described in 6.2.2 on the DC
UPS:
b) ensure the DC UPS is non-operational and pack it in its normal shipping state for transportation
C) subject the packaged DC UPS to two 15 9,. half-sine shock pulses of 11 ms nominal duration in all three planes, in accordance with IEC 60068-2-27;
NOTE No electrical measurements are taken during the test.
d) as final inspection after the above tests, unpack the DC UPS and check for signs of physical damage or distortion to component parts;
e) as final measurements, perform light load and functional tests (see 6.2.2.3) as routine tests.EN 62040-5-3-2017 pdf download.