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2026-4-10How to troubleshoot excessive temperature rise in a current transformer?
I. External Connection and Contact Status Inspection 1. Primary Connector Tightness and Contact Condition: Check if the P1/P2 terminal connection bolts are loose and if the spring washers are flattene -
2026-4-08What factors can cause excessive temperature rise in current transformers?
I. Overload Operation (Current Exceeding Rated Value) When the primary current consistently exceeds the transformer's rated value, winding copper losses and core losses increase significantly, gen -
2026-4-06How to handle an overheated current transformer in an emergency?
I. Emergency Handling Steps (Execute in order of priority) 1. Immediately reduce the primary load. Quickly transfer part of the load to reduce the current flowing through the transformer, thus reducin -
2026-4-03What are the hazards of excessive temperature rise in current transformers?
1. Damage and breakdown of insulation materials: Prolonged high-temperature operation accelerates the aging, embrittlement, and cracking of the internal insulation materials (such as epoxy resin and i -
2026-4-01Key Points for Current Transformer Grounding Inspection
I. Core Points of Grounding Inspection 1. The casing must be grounded. The metal casing of the current transformer should be connected to the grounding grid via a dedicated grounding bolt. The groundi -
2026-3-26What checks are required before energizing a current transformer?
I. Wiring and Connection Checks 1. Wiring Correctness: Confirm that the primary side (P1/P2) is correctly connected to the main circuit, with P1 facing the power supply side and P2 facing the load sid -
2026-3-20How long after installation can a current transformer be energized and put in...
After installation, a current transformer must be energized and put into operation only after all acceptance tests have been completed and confirmed to be qualified. This process is usually carried ou -
2026-3-16How long after installation should a current transformer be tested?
After a current transformer is newly commissioned, it should undergo commissioning tests, including infrared precision testing, within one week (but more than 24 hours). This typically applies to newl -
2026-3-10What checks are required after installing a current transformer?
I. Wiring Correctness Check 1. Confirm Terminal Connections are Secure Check that the primary side (P1/P2) is securely connected to the busbar or conductor, without looseness or oxidation, to prevent -
2026-3-06
How to determine if a current transformer is poorly grounded?
I. Preliminary judgment through abnormal phenomena If the following observable phenomena occur on-site, it indicates a possible grounding problem: Discharge sounds and signs of heat: Hearing a "c -
2026-3-04
How to troubleshoot poor secondary grounding of a current transformer?
I. Preliminary Visual Inspection (On-site visual inspection) Start with the most basic physical connections: Confirm that the secondary terminal S2 (or K2) is connected to the yellow-green grounding w -
2026-3-02
What are the consequences of poor secondary grounding of a current transformer?
I. High-voltage intrusion, threatening personal and equipment safety When the insulation between the primary and secondary sides breaks down due to aging, moisture, or overvoltage, high voltage (up to