GUWAHATI, Sept 14 - Absence of a voltage regulator led to malfunctioning of the hi-tech electro-mechanical machine system of the newly inaugurated ropeway in Guwahati, according to preliminary findings of an inquiry.
Details in the log book revealed that the voltage in the three-phase incoming power line to the main panel system of the ropeway fluctuated between 380 V and 440 V.
�The entire system is a highly sophisticated electro-mechanical one and it needs extreme care during preparation of the concepts, detailed project report (DPR), etc., by a competent agency before execution for trouble-free services,� said JN Khataniar, a member of the inquiry team constituted to probe the causes that led to the fault in the Rs 56-crore ropeway within days of inauguration.
Khataniar said electricity is being provided by the APDCL through a 500KVA transformer for the entire system within the campus. The main driving motor is Crompton Greaves brand of 135KW DC connected with a sophisticated electrical panel.
�This type of high-tech electro-mechanical machine system always needs constant voltage in all three phases for which the machine is being designed and manufactured for getting optimum efficiency and performance. It is the basic requirement during operation for smooth responses and management,� Khataniar said.
The APDCL can never guarantee constant voltage in the input system of an important project like this due to many reasons.
�In such conditions an automatic voltage regulator AVR) is a must in the system to take care of voltage fluctuations. Surprisingly, AVR has not been installed in the system. It is strange how the sophisticated machines were allowed to be commissioned without the AVR and why this controlling system is not included in the DPR!� Khataniar wondered.
He also wondered as to why those involved in the project, including APDCL and consultant RITES, did not recommend the device to ensure smooth performance.
An AVR costs Rs 7 lakh to Rs 8 lakh. The final inquiry report is expected to be submitted by Saturday.
