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IEC 60255-3 and integrate the standard one; they are applicable in coordination with fuses and MV circuit-breakers. 2 Trip curves 3 General characteristics Trip curve electronic releases PR 122/PR123 release – Other protection functions Trip curve electronic releases The following curves refer to the particular protection functions provided for PR122/PR123/PR332/PR333.

8 x In, I3 max = 9,5 x In Only the electronic settings are available. 12 12 I2t ON 10 10 102 102 1 1 T4 T5 400 I2t OFF 10-1 10-1 T5 630 T7 S,H,L 10-2 10-2 T6 630 T7 V T6 800 T6 1000 10-3 10-3 10-1 1 10 1 x In 2 10 I [kA] 10-1 1 10 10 x In 102 I [kA] Note: For all the CT sizes the maximum delay t1 is equal to 18s, except for 320 A CT (T4) and 630 A (T5) where t1=12s. For T4 In = 320 A, T5 In = 630 A and T6 In = 630 A ⇒ I3 max = 10 x In. Only the electronic settings are available. 9-1 In disabled at 8 In t=k 10-1 10-1 T7 S,H,L t=k T7 V 10-2 10-2 10-3 10-3 10-1 10 1 10 x In 102 I [kA] 10-1 1 10 10 2 I [kA] For T7 In = 1250 A, 1600 A ⇒ I3 max = 12 x In.

For all the CT sizes t1=18s, except with 320 A CT (T4) and 630 A (T5) where t1=12s. 00 In prevention at 8 In 1SDC210003F0004 10-2 10-3 10-1 1 10 102 x In Note: For PR223DS and PR223EF the electronic settings only are available. 84 I2t OFF 10-1 10-1 ABB SACE - Protection and control devices 10-2 10-3 10-1 1 10 102 I [kA] Note: The dotted curve for functional corresponds to the maximum delay (t1) wich can be set at 6 x I1, in the case where 320A CTS are used for T4 and 630A for T5. For all the CT sizes the maximum delay t1 is equal to 18s, except for 320 A CT (T4) and 630 A (T5) where t1=12s.

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