Advanced PT Switching & Protection Solutions for 35kV and Below
The device features PT parallel switching function, enabling PT switching, paralleling, overvoltage protection, undervoltage protection, voltage monitoring, insulation monitoring, and broken wire alarm for single bus section under 35kV and below voltage levels.
High-quality one-piece aluminum chassis with pluggable structure. The chassis surface uses brushed oxidation treatment, featuring elegant appearance and excellent shielding effect. Control circuits use pluggable terminal blocks with fixed flanges for convenient on-site debugging, maintenance, and replacement.
8 analog input channels for collecting two-section bus voltages and zero-sequence voltage data. Three-phase voltage adapts to both three-PT star connection and two-PT VV connection.
6 digital input channels: 5 channels for parallel conditions and 1 channel for parallel interlock.
11 relay output contacts: 8 channels for voltage paralleling contacts that can simultaneously parallel protection voltage and metering voltage, with independent protection output contacts. Additionally, 2 channels for action signal and alarm signal contacts.
High-speed RS485 communication interface with optoelectronic isolation and lightning protection. Standard communication protocol with communication rate up to 38400bps.
Large-screen LCD display with Chinese menu operation. Settings, sampling data, control word meanings, digital inputs, and fault information are all displayed in Chinese for convenient on-site setting adjustment and fault record query.
Fault recording and waveform capture functions display fault occurrence time, fault current and voltage data, and fault waveforms directly on the LCD screen.
High-precision clock chip enables accurate recording of various fault information. Also supports receiving network time synchronization from the distribution network master station.