ABB module LT8978bV1 is in stock
Brand ABB Color Standard Application Industrial height 205mm rated current 360mA
Protection Level IP45 Suitable for motor power 216KW Application Area Power Industry Material Code GJR2391500R1220 Power industry HIEE401782R0001 Part Number LT8978bV1
Applicable pipe 2 Whether imported is weighing 5.86 kg can be sold nationwide
ABB module LT8978bV1 is in stock
Low water pressure failure is a multiple failure, generally due to leakage, LT8978bV1 should focus on the elbow and joint inspection, usually easier to deal with. A very subtle point of failure, such as in this example, cannot be maintained by constant replenishment. Because water leakage often causes component corrosion, board damage, causing secondary failures, causing maintenance difficulties, so it must be found early, early treatment.
Excessive water temperature
(1) Phenomena
After the overhaul of the device, the inverter was driven for 1h, and the LT8978bV1 stopped because the water temperature exceeded the upper limit (55℃).
(2) Analysis
Check that the resistance value of ts1 of the cooling water temperature sensor is normal, check that the flat cable from the control board to the di/o card is properly connected, and the 220v supply to tt1 is normal. Eliminate the possibility of detection loop failure. Check the cooling water pressure is not abnormal, it is suspected that the external circulating cooling water temperature is too high, and the cooling effect is insufficient. However, after asking the technical personnel, the circulating water temperature of the ethylene propylene unit is the same as before the overhaul. Check the v22, v23 valve opening is normal, open the valve to. Drive again, check that the positive and negative control of the temperature controller cr72 is normal, the cv1 regulating valve is also opened when the temperature is high, and the LT8978bV1 but the temperature does not drop but rises. It is judged that the external circulating water flow is insufficient. Unfortunately, the installation did not leave the external circulating water pipeline process data, can only be found along the pipeline, after a day of hard work, an experienced chemical industry finally found the external circulating water valve in a place 200m away. Originally, during the overhaul, LT8978bV1 was converted
ABB module LT8978bV1 is in stock
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