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MASTER ammeters and voltmeters are designed for measuring current and voltage respectively in AC electrical circuits. Mounted on the door of LV panel cabinet, connected directly or through current transformer and display values of measured parameters.

Advantages of MASTER ammeters and voltmeters

Integration with intelligent energy consumption management systems. Data transmission for dispatching and automation.

• Convenient RS-485 communication interface.
• Ingress protection rating IP54 — can be used in places where rain drops and water jets may enter.
• Calibration interval: 2 years.
• High accuracy class: 0.5.
• Devices with two types of display to choose from: monochrome with backlight / LED.

Technical characteristics of MASTER ammeters

• Rated value of alternating current with direct connection I_н: 5 A.
• Measured parameters: I1 I2 I3 F.
• AC frequency measurement range: from 45 to 65 Hz.
• AC current measurement range: from 0.02∙I_н to 1.2∙I_н A.
• Communication speed via communication interface: 9.6 kbit/s.
• Operating temperature: from -25 to +55 °C.

Technical characteristics of voltmeters

• Measured parameters: U1 U2 U3 F.
• AC frequency measurement range: from 45 to 65 Hz.
• AC voltage measurement range: from 0.05∙U_н to 1.20∙U_н V.
• Supply voltage, AC/DC: from 80 to 270 V.
• Rated voltage with direct connection U_n: 230/400 V.
• Communication speed via communication interface: 9.6 kbit/s.