Technical Specifications Shares base electrical parameters with PQMII‑T20. 4 Form‑C programmable control relay outputs. 4 isolated digital inputs for external status pickup. Event‑triggered control action configuration support. Communication interfaces: dual rear RS485, front RS232. Supported protocol: Modbus RTU, DNP3.0 Control power supply:90‑300 VAC /70‑250 VDC Operating Temperature:‑20 °C to +60 °C Storage Temperature:‑40 °C to +85 °C Relative Humidity:5%‑95%, non‑condensing Mechanical Dimension:144 mm ×144 mm panel‑mount housing
Functional Features Inherits all metering, harmonic analysis and disturbance recording functions of PQMII‑T20. Supports user‑programmable control logic equations. Realizes load shedding, capacitor bank switching and alarm interlock actions. Relay output triggered by measured‑value threshold setpoints. Time‑stamped event logging for every control action. Full compatibility with EnerVista setup software for parameter configuration.
Application Scenarios Industrial distribution substation monitoring and control. Factory power‑factor correction automatic control systems. Large commercial building energy management projects. Distribution feeder load‑control application sites. Plant‑wide integrated power quality monitoring systems.
Performance Parameters Measurement accuracy consistent with PQMII‑T20: voltage/current ±0.2%. Relay contact resistive rating: 250 VAC / 5 A. Control‑action response delay: ≤80 ms. Shock and vibration resistance: Complies with industrial panel‑mount equipment vibration standards.
Structural Characteristics Same 144 × 144 mm panel‑mount dimension as PQMII‑T20 base model. Additional rear‑side dedicated terminal block for control‑loop wiring. Front‑panel LCD‑keypad human‑machine interface remains unchanged. Metal mounting brackets for cabinet panel installation. Internal shielding structure for electromagnetic interference suppression.
Installation Requirements Standard cabinet panel cut‑out size 138 × 138 mm. Separate wiring layout for power circuit, measurement circuit and control‑relay circuit. Implement reliable cabinet protective grounding connection. Control‑loop wiring load must conform to relay contact capacity limits. Shielded twisted‑pair cables shall be adopted for digital‑input signal wiring.
Usage Notes Do not exceed relay contact rated load capacity. Regularly back‑up meter configuration parameter files. Condensation environment shall be strictly avoided inside installation cabinet.
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