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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

Products are widely used in metallurgy, petroleum, glass, aluminum manufacturing, petrochemical industry, coal mine, papermaking, printing, textile printing and dyeing, machinery, electronics, automobile manufacturing, tobacco, plastics machinery, electric power, water conservancy, water treatment/environmental protection, municipal engineering, boiler heating, energy, power transmission and distribution and so on.

1756-CN2R/B Communication module

Line supply types The air and creepage distances in the SIMODRIVE 611 drive converter system have been dimensioned for rated voltages up to 520 V AC, 300 V phase– grounded neutral point. This voltage may never be exceeded as otherwise the converter insulation system would be damaged and would result in inadmissibly high touch voltages. ! Caution The drive converters may only be connected to TN line supplies, either directly or through an autotransformer. The SIMODRIVE 611 drive converter system is insulated in compliance with DIN EN 61800–5–x. This means that the insulation system is designed for direct connection to a TN line supply with grounded neutral point. For all other line supply types, an isolating transformer with neutral point on the secondary side must be used upstream (in front of) the units. This transformer is used to de–couple the line supply circuit (overvoltage Category III) from a non line–supply circuit (overvoltage Category II), refer to IEC 60644–1.

IT line supply

Symmetrical 3–conductor or 4–conductor three–phase line supply with no directly grounded point. The loads are connected, e.g. with grounds.Thus, within the pulsed transistor converter, the voltage stressing on the insulating clearances between the power circuits at the line supply potential and the open and closed–loop control circuits referred to the protective conductor potential, according to a rated voltage of 300 V complies with IEC/DIN EN 50178. Due to the 6–pulse 3–phase bridge circuit in the line supply infeed module, any fault currents will contain DC components. This must be taken into consideration when selecting/dimensioning a fault current protective device, e.g. an RCCB.Suggestion: Dyn0 or Yyn0; this means either a delta or star circuit on the primary side and star circuit on the secondary side where the neutral point is brought–out.

Matching transformer configuration

A matching transformer must be dimensioned for the total of all loads connected to it. The apparent power required for the NE modules must be determined and added as shown in Chapter LEERER MERKER, Table 7-1. If the transformer Sn or SK is too small, this can lead to increased line voltage dips and faults in the system and in other loads at this connecting point. The short–circuit power must be adequately dimensioned so that the overcurrent protective device reliably trips.A sufficiently high system fault level (short–circuit power) is required to ensure that when a ground fault does occur, the fuses rupture in the specified time. An insufficient system fault level (short–circuit power) increases the time to trip beyond permissible levels (e.g. a fire is possible).

In order to avoid faults and disturbances at the other loads, that are connected to the secondary side of the matching transformer, the sum of the system fault level (short–circuit power) of the plant connection and that of the matching transformer at the connection point (SK line supply) must contain at least the values shown in Table 7-1, Chapter LEERER MERKER. Depending on the vector group of the transformers, e.g. YYn0, asymmetric loading of the N/MP may not be permitted.