The main products

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

TOSHIBA USIO21 serial port module

Van, Vbn, Vcn: Displays phase voltages corresponding to the A, B, and C voltage inputs. This voltage will be measured correctly only if the VT RATIO, VT NOMINAL SECONDARY, and VOLTAGE WIRING setpoints match the installed VTs. If the displayed voltage does not match the actual voltage, check the setpoints and wiring. This message appears only if the VT WIRING is configured for a wye input. • Iavg/Vavg: Displays the average of the three phase currents/voltages. This value is not visible if the VT WIRING setpoint is set to “Single Phase Direct”. L-N is displayed when VT WIRING is set to “4 Wire Wye / 3 VTs”, “4 Wire Wye Direct”, “4 Wire Wye / 2 VTs”, or “3 Wire Direct” and L-L is displayed when VT WIRING is set to “3 Wire Delta / 2 VTs”. • Vab, Vbc, Vca: Displays line voltages corresponding to the A, B, and C voltage inputs. The measured voltage is correct only if the VT RATIO, VT NOMINAL SECONDARY, and VOLTAGE WIRING setpoints match the installed VTs. If the displayed voltage does not match the actual voltage, check the setpoints and wiring. • AVERAGE LINE VOLTAGE: Displays the average of the three line voltages. This value is not visible if the VT WIRING setpoint is set to “Single Phase Direct”. • VOLTAGE UNBALANCE: Displays the percentage voltage unbalance. Voltage

Even though it is possible

 to achieve unbalance greater than 100% with the above formula, the PQMII will limit unbalance readings to 100%. If the average voltage is below 10% of VT RATIO × VT NOMINAL SECONDARY VOLTAGE for “3 Wire Delta / 2 VTs”, “4 Wire Wye / 3 VTs”, and “4 Wire Wye / 2 VTs” connections, or below 10% of VT RATIO × NOMINAL DIRECT INPUT VOLTAGE for “4 Wire Wye/Direct” and “3 Wire Direct” connections, the unbalance reading is forced to 0%. This is implemented to avoid nuisance alarms when the system is lightly loaded. If the simulation voltages are being used, the unbalance is never forced to 0%. • Van, Vbn, Vcn MIN/MAX: Displays the minimum/maximum phase voltage magnitudes and the time and date of their occurrence. This information is stored in non-volatile memory and is retained during loss of control power. The S1 PQMII SETUP ÖØ CLEAR DATA ÖØ CLEAR MIN/MAX VOLTAGE VALUES setpoint clears these values. • Vab, Vbc, Vca MIN/MAX: Displays the minimum/maximum line voltage magnitudes and the time and date of their occurrence. This information is stored in non-volatile memory and is retained during loss of control power. The S1 PQMII SETUP ÖØ CLEAR DATA ÖØ CLEAR MIN/MAX VOLTAGE VALUES setpoint clears these values. • V U/B MIN/MAX: Displays minimum/maximum voltage unbalance and the time and date of its measurement. This information is stored in non-volatile memory and is retained during loss of control power. This value is cleared with the S1 PQMII SETUP ÖØ CLEAR DATA ÖØ CLEAR MIN/MAX VOLTAGE VALUES setpoint.