Does the Quattro comply with EN50549-1 with specific Irish settings as per this :
2. Applicable Technical Standards
2.1 I.S. EN 50549-1
All installed Micro-Generators shall comply with I.S. EN 50549-1 with the specific Irish protection settings set out
below in Table 3 of this document.
ESB Networks may in the future seek to invoke or apply some of the equipment capabilities cited in I.S. EN 50549-
1. Where this arises, ESB Networks should communicate such proposed changes with industry and stakeholders
as effectively as possible. Any applicable changes to the Distribution Code shall be progressed through the
Distribution Code Review Panel (DCRP).
2.2 Interface Protection Settings
Table 3 below displays the specific Irish interface protection settings for Micro-Generators.
Table 3: Micro-Generation interface settings
Parameter Trip setting Clearance time
Over voltage
Pre I.S. EN 50549-1 Single Stage Voltage Setting 269 V / 468 V 0.7 s
I.S. EN 50549-1 Two Stage Voltage Settings Stage 1 269 V / 468 V 70 s
Stage 2 281 V / 488 V 0.7 s
Under voltage 191 V / 332 V 0.7 s
Over frequency* 52 Hz 0.5 s
Under frequency* 47 Hz 0.5 s
An explicit Loss of Mains functionality shall be included. Established methods such as, but not limited to, Rate of
Change of Frequency, or Source Impedance Measurement may be used. Where Source Impedance is measured,
this shall be achieved by purely passive means. Any implementation which involves the injection of pulses onto the
DSO network, shall not be permitted.
ROCOF (**) 1.0 Hz/s 0.6 s
Vector Shift Not permitted
(*) For relays that have a setting step of 0.1Hz then the frequency should be set to 52.1 Hz and
46.9 Hz respectively
(**) reset interval should be set to >0.6 seconds to detect step changes
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