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SY9051 Voltage and Current Switching Unit
A voltage and current switching assembly with feedback connections for configured SONGYANG energy meter test bench source systems.
Description
The SY9051 is described in the SONGYANG parts manual as the voltage and current switch case. Its panel is marked “Transformer (SY9051)”. This assembly belongs to the bench source system and provides range-switching and feedback connections for the voltage and current circuits.
The documented arrangement includes feedback current and voltage transformers, switching circuits and auxiliary supply connections. The unit receives switching commands from the signal source to control the associated relay circuitry. The parts manual notes that the current range-switch board is phase-dependent, making the installed settings important for a replacement.
Configuration notes
Match the unit to the bench model, serial number, phase arrangement and installed wiring. Range-switch settings and connections depend on the specific configuration. Contact us with the existing panel label, connector layout and bench details before selecting an assembly.
