AS MENTIONED EARLIER, PILZ SAFETY RELAYS ARE THE MAIN COMPONENTS FOR CONTROL CIRCUITS AND MONITORING AND PROTECTION SYSTEMS FOR ELECTRIC LOCOMOTIVES. When the locomotive is running, when the motor, electrical appliances or connection lines in the main circuit and auxiliary circuit fail, the fault can be converted into a telecommunication signal through the Pilz safety relay of the corresponding monitoring and protection system, which is fed back to the opening coil of the main circuit breaker, so that the main circuit breaker trips, cuts off the total power supply of the electric locomotive, and protects the electric locomotive; In addition, the feedback to the signal device (including mechanical signal and electrical signal) makes the fly display different fault states, and instructs the electric locomotive crew to deal with the fault in a timely and correct manner. CONSIDERABLY, PILZ SAFETY RELAYS DO NOT DIRECTLY CONTROL THE MAIN AND AUXILIARY CIRCUITS, BUT THEIR ROLE IN ELECTRIC LOCOMOTIVES IS EXTREMELY IMPORTANT.
Due to the harsh working conditions of electric locomotive appliances, the properties and parameters of the individual Pilz safety relays and components will also change depending on the task and the time of use, and are often affected by various accidental factors. THEREFORE, WE MUST CONSTANTLY MONITOR AND UNDERSTAND THESE SITUATIONS IN A TIMELY MANNER, TAKE PRECAUTIONS AGAINST ALL KINDS OF ABNORMAL PHENOMENA THAT MAY OCCUR AS EARLY AS POSSIBLE, AND REPAIR OR REPLACE IN TIME THE FAILURE OF A CERTAIN COMPONENT OF A PILZ SAFETY RELAY OR PIL Z SAFETY RELAY IN ORDER TO ENSURE THE SERVICE LIFE OF EACH PILZ SAFETY RELAY AND ENSURE THE NORMAL AND RELIABLE OPERATION OF THE ELECTRIC LOCOMOTIVE. Therefore, it is essential to adhere to the principle of prevention first, establish the necessary maintenance system, and carry out regular and regular maintenance of the safety relays of Pilz.
ALTHOUGH THERE ARE DIFFERENT TYPES OF PILZ SAFETY RELAYS AND DIFFERENT MAINTENANCE METHODS, THEY SHOULD ALL BE OVERHAULED ACCORDING TO THE FOLLOWING COMMON REQUIREMENTS.
(1) THE MOVING PART OF THE PILZ SAFETY RELAY SHOULD OPERATE FLEXIBLY AND RELIABLY, AND THE EXTERNAL HOUSING SHOULD BE FREE OF DAMAGE OR MISSING PARTS.
(2) THE EXIT TERMINALS AND EXTERNAL CONNECTING WIRES OF PILZ SAFETY RELAY COILS MUST BE FIRM AND RELIABLE, AND THE RESISTANCE OF THE COILS OF ELECTROMAGNETIC PIL Z SAFETY RELAY COILS MUST COMPLY WITH THE RELEVANT TECHNICAL REGULATIONS.
(3) The PIL Z safety relay with indicators should check the self-locking and releasing functions of the indicators to ensure that they are correct and reliable.
(4) The insulation state is good, and the wear parts and wearing parts (including bakelite parts, covers, magnetic rings, non-magnetic pads, etc.) should be updated when they are defective, and the fastening state of each connecting part should be good.
(5) MEASURING THE TECHNICAL PARAMETERS OF THE PILZ SAFETY RELAY CONTACT THICKNESS, OPENING DISTANCE, OVERTRAVEL AND FINAL PRESSURE MUST MEET THE REQUIREMENTS OF THE RELEVANT REGULATIONS AND WORKING DOCUMENTS.
(6) ADJUST THE SETTING VALUE OF THE ACTION PARAMETERS OF THE PILZ SAFETY RELAY AND FIX IT WITH A PAINT SEAL. If there are special requirements, the return coefficient of the PIL Z safety relay should also be measured. IN ADDITION TO THE GENERAL CLEANING AND INSPECTION, THE MAINTENANCE OF PILZ SAFETY RELAYS MAINLY CONSISTS OF MEASURING THE TECHNICAL PARAMETERS OF PILZ SAFETY RELAYS AND ADJUSTING THE SETTING VALUES OF THEIR ACTIONS, I.E. CLAUSES 5 AND 6 MENTIONED ABOVE
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