| UPS Standards & Related Power Quality Standards |
EIA 422: Former RS 422, is a 4 wire Communication Standard for Serial signal transmission
between a computer and peripheral devices. The maximum distance is 4000 feet (1200 m). One
driver can be connected to up-to 10 receivers. .
EIA 485: Former RS 485, is a 2-wire Communication Standard for Serial signal, multi point
transmission. The maximum distance is 4000 feet (1200m). The standard specifies up to 32 drivers
and 32 receivers on a single buss.
ENV 50091: European Standard: Equivalent to IEC 62040, published by Cenelec. See
IEC 62040
IEC 60529 (IP code): See IP Code.
IEC 61000-3-2 Standard: Limits of input current harmonics (equipments with Input Current
<= 16A/Phase).
IEC 61000-3-4 Standard: Limits of input current harmonics (equipments with Input Current
> 16A/Phase).
IEC 61000-4-11:Standard- Voltage dips, short interruptions and voltage variations immunity tests
(equipments with Input Current <= 16A/Phase).
IEC 61000-4-34 Standard: Voltage dips, short interruptions and voltage variations immunity tests
(equipments with Input Current > 16A/Phase).
IEC 60950 (former IEC 950) Standard: Safety of Information Technology equipment (Applicable
also to UPS systems).
IEC 62040-1-1: Standard: General and safety requirements for UPS systems used in restricted
access locations.
IEC 62040-1-2: Standard: General and safety requirements for UPS systems
used in operator access areas.
IEC 62040-2: Standard: UPS Electromagnetic compatibility (EMC) requirements.
IEC 62040-3: Standard: UPS performance requirements and test methods.
IP Code: Degrees of Enclosure protection evaluated as described in IEC 60529 standard.
PE-1: Nema Standard: equivalent to IEC 62040-3 with certain differences.
UL 1778 US Standard : standard for Uninterruptible Power Supply equipment.
UL 60950: US Standard: equivalent to IEC 60950. UL requires UPS systems to comply with UL1778
and UL 60950-1.
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