Toshiba GR200 Series Instruction Manual

Also see for GRB200: Instruction manual

6F2S1931 (0.20)Centralized GRB200(Soft: 030, 031, 032, 033, 034)- 135 -TMS = time multiplier setting number,k, α, c = constants defining curve.The nine pre-programmed standard characteristic curves are defined in Table 2.6-2. Inaddition, one original (user-programmable) curve can be applied. One curve can be chosen foreach OC stage. Figure 2.6-2 illustrates these characteristic curves. For example, the usershould set one for the scheme switch [OC1-Timer]. (“IEC-NI" is for IEC Normal Inversecharacteristic; “IEC-VI” for IEC Very inverse; “IEC-EI” for IEC Extremely Inverse; “UK-LTI” forUK Long Time Inverse; “IEEE-MI” for IEEE Moderately Inverse; “IEEE-VI” for IEEE VeryInverse; “IEEE-EI” for IEEE Extremely Inverse; “US-CO8” for US CO8 Inverse; “US-CO2” forUS CO2 Short Time Inverse, and “Original” for user-programmable characteristic.)In the IDMT, the user can also program the characteristic using time-multiplier-setting(TMS) for the required operate time. For example, when the IEC characteristic is selected, theuser can set the TMS value using the setting [OC1-TMS-IEC] (incidentally, the default valuefor the TMS is 1.00). The other TMSs are also available by the [OC1-TMS-UK], [OC1-TMS-IEEE], [OC1-TMS-US] and [OC1-TMS-ORG].Table 2.6-2 Constants for IDMTCurve type(IEC 60255-151) Curve Description ksec α csecA IEC Normal Inverse (IEC-NI) 0.14 0.02 0B IEC Very Inverse (IEC-VI) 13.5 1 0C IEC Extremely Inverse (IEC-EI) 80 2 0- UK Long Time Inverse (UK-LTI) 120 1 0D IEEE Moderately Inverse (IEEE-MI) 0.0515 0.02 0.114E IEEE Very Inverse (IEEE-VI) 19.61 2 0.491F IEEE Extremely Inverse (IEEE-EI) 28.2 2 0.1217- US CO8 inverse (US-CO8) 5.95 2 0.18- US CO2 short time inverse (US-CO2) 0.02394 0.02 0.01694