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Details the voltage, current, power, and frequency measurement ranges for the APM power meter.
Specifies the accuracy of full-scale measurements for voltage, current, frequency, THD, and power.
Illustrates the wiring diagram for Modbus communication connections.
Shows the wiring connections for the digital outputs of the APM meter.
Details the wiring for the 4-20mA analog output functionality.
Provides the wiring diagram for single-phase power meter setup with line power.
Illustrates the wiring for single-phase meters using local power supply.
Shows the wiring for split-phase power meter setup with line power.
Details the wiring for split-phase meters using local power supply.
Provides wiring diagram for three-phase meters with neutral and line power.
Illustrates wiring for three-phase meters (no neutral) with local power.
Shows wiring for three-phase meters using PT and CT with local power.
Covers essential safety instructions for installing the APM power meter.
Highlights specific safety requirements for voltage measurements and protection.
Provides safety instructions for cleaning, inspection, and maintenance of the unit.
Lists environmental operating conditions and power supply details for the APM.
Details display characteristics, open collector, and analog output specifications.
Covers connection types, wire specifications, and panel cutout dimensions.
Explains the concept of control outputs and isolation barriers in the APM.
Provides dimensions and cutout details for panel mounting the APM.
Describes the functions of the front panel buttons for parameter navigation and scrolling.
Notes the requirement for software to configure setpoints and outputs.
The Trumeter APM (Advanced Power Meter) is a sophisticated and versatile power meter designed for engineers who require an effective way to monitor and display electrical data in industrial settings. This device is intended for installation into electrical cabinets or display panels, providing comprehensive insights into various electrical parameters.
The APM is engineered to accept a range of electrical inputs, depending on the specific model, and then display this data on its integrated multi-format display. Its primary function is to provide accurate and real-time measurements of key electrical parameters, enabling users to monitor the performance and health of their electrical systems. The device is capable of measuring voltage (both line-to-line and line-to-neutral), current (via CT only), power (including W, VA, and VAr), and frequency. This broad measurement capability makes it suitable for a wide array of applications, from single-phase to three-phase systems, with or without neutral, and even in scenarios requiring potential transformers (PTs) and current transformers (CTs).
The APM's display is a key feature, offering a multi-format interface that can present data clearly and efficiently. It includes a combination of digital digits for precise readings, bar-graph segments for quick visual interpretation of levels, and starburst message characters for additional information or alerts. The backlight colors (Red, Green, White) and the positive or negative LCD display enhance readability in various lighting conditions. The device also boasts a fast update frequency for both digits and bar-graphs, ensuring that users receive timely information.
Beyond basic measurement and display, the APM offers various output capabilities to integrate with other control and monitoring systems. It features open collector sinking outputs, which can be used for signaling or control purposes based on predefined thresholds. Additionally, it provides analog output (4-20mA), allowing the measured data to be transmitted to PLCs, SCADA systems, or other analog input devices for further processing or logging. For digital communication, the APM includes Modbus connections, enabling it to be part of a larger network for remote monitoring and control. The USB port facilitates configuration and data retrieval, making it a flexible tool for system integration.
The device's design emphasizes safety and reliability, incorporating reinforced isolation to protect against hazardous voltages. It is designed to operate within a specified temperature range and humidity levels, ensuring stable performance in typical industrial environments. The robust IP65 rating from the front panel indicates protection against dust and water ingress, making it suitable for demanding industrial applications.
The APM is designed for ease of use and flexibility in various electrical configurations. Its comprehensive wiring diagrams illustrate how to connect the device for different power systems, including single-phase (line and local power), split-phase (line and local power), and three-phase (with and without neutral, line and local power, and with PT and CT). This adaptability ensures that the APM can be integrated into a wide range of existing electrical infrastructures.
For current measurement, the APM exclusively uses Current Transformers (CTs) with a 0-5A secondary, which simplifies installation and ensures accurate readings for higher currents. The device's power measurement capabilities extend up to 999,999 MW, with the specific range being dependent on the CT ratio, allowing it to handle very large power systems.
The front panel of the APM features intuitive buttons for user interaction. A "Change Parameter" button allows users to cycle through different displayed parameters, providing quick access to all measured data. An "Auto Scroll Parameters" button enables the device to automatically switch between parameters every few seconds, offering a hands-free monitoring experience. This feature is particularly useful for continuous overview of multiple critical values without manual intervention.
Configuration of the APM's setpoints and outputs is managed through dedicated software. This software provides a powerful interface for customizing the device's behavior, such as setting alarm thresholds for the open collector outputs, scaling the analog output, and configuring Modbus communication parameters. This software-driven approach allows for precise tuning of the APM to meet specific application requirements, enhancing its utility as a monitoring and control component.
The physical design of the APM includes a standard panel cut-out size, making it compatible with common industrial panel designs. The inclusion of a gasket and retaining clip in the box simplifies the installation process and ensures a secure fit within the panel. Screw terminals are used for electrical connections, accommodating various wire types (solid or stranded) and gauges, and providing a secure and reliable connection point. The specified torque for these terminals ensures proper tightening, preventing loose connections and potential electrical hazards.
The APM is designed with maintenance considerations in mind, emphasizing safety and longevity. Before any cleaning, inspection, or maintenance activities, it is crucial to isolate all power sources to the unit. This fundamental safety practice prevents electric shock and protects both the user and the device.
The device is designed to be user-friendly in terms of internal components; there are no user-serviceable parts inside the unit, and opening the case is not recommended. This design philosophy simplifies maintenance by eliminating the need for internal repairs, focusing instead on external checks and proper installation.
Regular inspection of all external wiring connections is a key maintenance practice. Users should periodically check for any damaged wiring and ensure that all connections are securely tightened. This helps to prevent intermittent faults, power losses, and potential safety hazards.
For cleaning the unit, a dry cloth should be used to wipe the casing. This simple cleaning method is sufficient to keep the device free from dust and debris, which can accumulate in industrial environments and potentially affect performance or readability.
A critical aspect of maintenance and installation highlighted in the manual is the careful connection of the power supply. Connecting power to the wrong terminals can lead to the destruction of the unit. Therefore, meticulous attention to wiring diagrams and terminal labels is essential during installation and any subsequent maintenance involving power connections.
The manual also emphasizes the importance of external safety components. An external fuse must be fitted in-line with the Power Supply Unit (PSU) to protect the device from overcurrents. The recommended fuse specifications (0.5A/300V with a breaking capacity of 35A or greater) are provided to ensure adequate protection. Similarly, for voltage measurements, an external UL recognized or listed overcurrent protection device (fuse or circuit breaker) must be fitted in-line with the voltage lead, with specific recommendations for fuse type and voltage rating.
All conductors carrying hazardous voltage must have external switching or disconnect mechanisms that provide at least 3 mm of contact separation in all poles. This ensures that the device can be safely isolated from the power source when necessary. Signal cables connected to the device should not exceed 30 meters in length, and if routed outside the building, additional surge-protection devices are required to prevent damage from transient voltages.
Finally, all current transformers must be certified to IEC 61010-1:2010, and to reduce the risk of electric shock, the power circuit being monitored should always be disconnected before installing or servicing current transformers. If the device is used outdoors, it must be installed in an IP65 rated enclosure to maintain its environmental protection. These guidelines collectively ensure the safe, reliable, and long-term operation of the Trumeter APM.
General| Display Type | LCD |
|---|---|
| Supply Voltage | 12-24 VDC |
| Operating Temperature | -10 °C |
| Dimensions | 96 mm |
| Protection | IP65 |
| Display | LCD |
