Yokogawa 103131LS-MT7 Switchboard Panel Meter

Product Overview

The Yokogawa 103131LS-MT7 is an analog switchboard panel meter designed for accurate and reliable measurement of AC current in industrial and commercial power systems. It belongs to Yokogawa’s 103 Series, part of the AB40/DB40 family of heavy-duty switchboard meters known for precision, durability, and long service life. The unit features a large, easy-to-read analog scale with a wide 250° pointer deflection, making it suitable for monitoring current at a glance in control panels and switchgear applications.

Key Features

• Type: Analog AC ammeter, transformer-rated (5 A secondary input)

• Series: Yokogawa 103 Series, AB40/DB40 switchboard meter family

• Scale Range: Customizable full-scale current range depending on the current transformer (CT) ratio (commonly 0–100 A, 0–200 A, 0–1000 A, etc.)

• Accuracy: ±1% of full scale

• Deflection: 250° pointer movement for clear and precise readings

• Input Frequency: 40 to 70 Hz

• Case Material: Rugged, copper-free aluminum or steel case with protective front cover

• Mounting Style: Standard 4¼-inch switchboard mount (ANSI standard)

• Operating Environment: Industrial-grade, suitable for continuous use in demanding electrical applications

• Standards: Designed to meet ANSI C39.1 and UL/CSA requirements

Applications

• Electrical switchboards and distribution panels

• Industrial control systems

• Power generation and substations

• Marine and transportation power systems

• Factory automation and utility monitoring panels

• Retrofit or replacement applications using the 4¼-inch cutout standard

Construction and Design

The meter features a heavy-duty metal case designed for switchboard mounting, providing excellent mechanical strength and electromagnetic shielding. The high-contrast analog dial allows easy visibility from a distance, and the front cover helps protect against dust and moisture. The internal movement is precision-balanced for smooth pointer operation, ensuring long-term accuracy even under vibration or fluctuating load conditions.

Operating Notes

• This model is transformer-rated and designed for a 5 A secondary input; actual current range depends on the CT used in the system.

• The “MT7” suffix denotes a specific range or scale configuration—confirm compatibility with your system before installation.

• Ensure correct CT polarity and wiring when connecting to the meter.

• Proper panel cutout and clearance are required for installation.

• This model is part of a discontinued Yokogawa series, but replacement units and equivalents are still available as surplus or new old stock.