7PG15 - TR Relays High Speed Tripping Description Siemens Protection Devices Limited 3 Relay Type Number of Contacts Contact Reset Arrangement Operating Coil Cut-off Specification Burden Level Modular Case Size TR112 7 or 11 Self Economy EB1 low E4 TR121 7 or 11 Hand Instantaneous EB1 Low E2 TR131 6 or 10 Electrical Instantaneous EB1 Low E2 TR141 6 or 10 Hand & electrical Instantaneous EB1 Low E2 TR212 6 or 10 Self Economy EB2 High E2 or E4 TR214 5 or 10 Self Economy 2s delayed reset EB2 High E4 TR221 7 or 11 Hand Instantaneous EB2 High E2 TR223 7 or 11 Hand 40/60ms delay EB2 High E4 TR231 6 or 10 Electrical Instantaneous EB2 High E2 TR233 6 or 10 Electrical 40/60ms delay EB2 High E4 TR241 6 or 10 Hand & electrical Instantaneous EB2 High E2 TR243 6 or 10 Hand & electrical 40/60ms delay EB2 High E4 TR312 5 Self Economy NGC P15 Low E4 TR431 7 Electrical Instantaneous NGC TDM.5/11 Low E4 TR512 6 Self Economy NGC P11 High E4 TR901 10 electrical Instantaneous EB2 High E2 Table 1 Standard Relays Siemens Protection Devices Limited 4 TR1 and TR2 relays Operating time 10ms at rated voltage Rated voltage Vn 24V, 30V, 48V, 125V, 240V d.c. Note: 24V and 240V ratings are not part of ESI 48-4 Operating range 50% to 120% of rated voltage Operating coils of self-reset and economy cut-off relays are rated at 120% of rated voltage. All other operate and reset coils are short time rated well in excess of the operating time of their cut-off contacts. Self-reset relays will reset at not less than 5% rated voltage. Nominal burdens BURDEN (W) Rated voltage V d.c. TR1-- TR2-- 30 43 43 48 46 52 125 47 127 Reset coil 50 50 Relays with economy circuits reduce to approximately 7W after operation. Contacts Ratings Make and carry continuously: 1250VAa.c. or 1250Wd.c. within limits of 660V and 5A Make and carry for 3 seconds: 7500VAa.c. or 7500Wd.c. within limits of 660V and 30A Break: 1250VAa.c. or 100W (resistive) d.c. or 50W (inductive) d.c. within limits of 250V and 5A Indication: TR1 and TR2 relays have a hand reset mechanical flag indicator, TR4 and TR9 relays have a self reset flag indicator.