Instrument Transformers for Ring Main Unit (RMU)
- Compliant Standards: GB/T 20840.1, IEC 61869-1; GB/T 20840.2, IEC 61869-2; GB/T 20840.3, IEC 61869-3, and special customer requirements.
- Structural Overview:
- Voltage Transformer: Manufactured using epoxy resin casting, with the coil fully enclosed within the body. The primary high-voltage terminal can be installed in the ring main unit via cables, and the primary circuit of the product is equipped with a high-voltage fuse. The secondary output terminal is structured as a terminal box and fitted with a waterproof connector.
- Current Transformer: Features an external plastic shell structure with internal polyurethane resin encapsulation. Structural forms include bus-through type, bushing type, and three-phase integrated type. The secondary output is typically terminal-based but can be adapted to cable output based on requirements.
- Product Features:
- Voltage Transformer: Compact structure, low partial discharge, and a metal shielding layer on the outer surface. During operation, it is grounded through connection with the base plate, achieving full shielding to effectively avoid electric field interference and enhance operational stability.
- Current Transformer: Small size with multiple dimension options. Different structural forms of current transformers can be selected based on various installation positions. The plastic shell has a refined appearance with good consistency. It offers mature electrical performance, large supply capacity, and stable and reliable operation.
- Application Fields: Urban power supply, industrial electrical automation, primary-secondary integrated systems, IoT technology development, intelligent grid distribution networks, and many other fields.
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