从China供应商批发进口6kv Motor Protection Relay Nep 998a — FOB条款

The NEP 998A is a 6 kV motor protection relay manufactured by Deyang Yoyik, designed for high-voltage motor protection in power generation stations, mining operations, and petroleum processing facilities where induction and synchronous motors require coordinated overcurrent, overload, and earth fault protection. The relay operates within 6 kV motor control centres and switchgear assemblies, interfacing with vacuum contactors or circuit breakers to isolate faulted motors before winding damage or catastrophic failure occurs. Its electronic architecture implements IEC 60255 protection relay standards for measurement and control accuracy, with trip characteristic curves programmable for specific motor thermal profiles and starting conditions.

The device employs copper conductors within a composite housing, with internal electronics processing current transformer inputs from phase and earth fault sensors to discriminate between normal starting inrush, sustained overload, and internal or external fault conditions. Protection functions typically include definite time and inverse time overcurrent, locked rotor protection, negative sequence current detection for rotor fault indication, and stalling protection during prolonged acceleration. The relay's setting range and time-current characteristics must be matched to the specific motor rating, cooling method, and duty cycle; improper coordination with motor thermal withstand curves renders even a correctly functioning relay ineffective. Communication capabilities, if present, may include Modbus or proprietary protocols for integration into plant distributed control systems.

Primary buyers include power plant engineering contractors, mine electrical maintenance departments, oil refinery instrumentation teams, and OEM switchgear builders across Southeast Asia, the Middle East, and Africa where Deyang Yoyik has established export activity. Procurement typically involves confirming relay compatibility with existing 6 kV switchgear dimensions, control voltage requirements, and current transformer ratios. The supplier indicates CE and ISO certification, though buyers should verify current certificate scope and validity. Given the zero percent platform response rate, direct enquiry to the Deyang, Sichuan address is advisable to confirm technical documentation availability, spare parts commitment, and application engineering support for complex motor protection schemes.

Dongfang Yoyik Engnieering Co., Ltd. is based at 4-3F, Building A, Huashan Platz in Deyang, Sichuan Province, a city in southwestern China with historical significance in heavy equipment manufacturing and power engineering. The company operates under harbor trust tier status, though like the first listing it shows zero percent response rate and no recorded average response hours, suggesting limited platform engagement or alternative communication channels. The address indicates office or trading company premises rather than manufacturing floor space, though this does not preclude affiliated production facilities elsewhere in Deyang or Sichuan.

The supplier's product range extends far beyond this single relay to encompass a substantial array of power plant spare parts including LVDT sensors, temperature sensors, pressure switches, eddy current sensors, and tachometers, indicating positioning as a comprehensive instrumentation and protection equipment provider rather than a relay specialist alone. The listing references acting as distributor for foreign brands including Eaton Vickers, though verification of these distribution agreements is advisable. No information is provided about company founding date, employee count, annual revenue, manufacturing certification, or specific client installations, so buyers should request these details directly to assess technical competency and financial stability for project-scale procurement.