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Spare parts spare parts, the DCS control system of PLC system and the robot system spare parts,

Brand advantage: Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft etc. Various kinds of imported industrial parts

BENTLY 3500/22M Interface module

Trip 25-32 corresponds to Trip 01-08 (providing tripping unit fitted). Delay Time between the function picking up and tripping. I-Setting Pick-up current setting. Setting restrictions:
not > 2.5 IN when supplied from metering cores
not < 0.2 IN when supplied from protection cores. f-min defines the minimum frequency for which measurement is required. Setting restriction: not < 40 Hz when supplied from metering cores. MaxMin defines operation as overcurrent or undercurrent. Settings:
MAX: overcurrent
MIN: undercurrent. NrOfPhases defines whether single or three-phase measurement. CurrentInp defines the c.t./v.t. current input channel. All current I/P's may be selected. In the case of three-phase measurement, the first channel (R phase) of the group of three selected must be specified. BlockInp Binary address used as blocking input (F
FALSE, T
TRUE, binary input or output of a protection function). Trip Output for signalling tripping (signal address). Start Output for signalling pick-up (signal address).E. Setting instructions Settings: Current pick-up I-Setting Delay Delay Minimum frequency f-min Over or undercurrent MaxMin

Typical settings

The instantaneous overcurrent function is a high-speed protection, which operates in a wide frequency range. It is intended primarily for two applications. A protection measuring peak value is necessary for protecting units, for which the influence of DC component and harmonics may not be neglected. This is especially the case where rectifiers with semiconductors are involved. The measuring principle of the function is relatively insensitive to frequency and operates in a range extending from 4 to 120 % of rated frequency. It is therefore able to protect units with synchronous starting equipment during the starting sequence before reaching system frequency (e.g. gas turbine sets with solid-state starters). The function detects when the instantaneous value of the input current exceeds the peak value corresponding to the setting. For example, for a setting of 10 IN, it will pick up when the input current exceeds 10 2 IN = 14.14 IN (see Fig. 3.5.6.1). A fault current of 6 x 1.8 2 IN = 15.27 IN could reach this level as a consequence of a DC component. The minimum frequency must be entered for every application, because it determines the reset time. A low minimum frequency means a long reset delay and, since a good protection is expected to have a quick response, the reset time should be as short as possible, i.e. the minimum frequency setting should not be lower than absolutely necessary.