Transformer Terminal Unit (TTU)

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Smart Distribution Management
Transformer Terminal Unit (TTU)

The Transformer Terminal Unit (TTU) is an intelligent terminal device integrating power supply and consumption information collection for distribution transformers, data collection from meters and other terminals, equipment status monitoring, communication networking, localized analysis and decision-making, and collaborative computing. Utilizing a unified standard system development environment to decouple software and hardware, it supports an edge computing framework where terminal functions are implemented as applications, meeting the flexible and rapid development needs of power distribution and utilization businesses.

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Technical Specifications

AC parameters	Measurement range	Voltage	V	176-264
		Current	A	0-6
		Frequency	Hz	45-55
	Measurement accuracy	Voltage	%	≤±0.5
		Current	%	≤±0.5
		Frequency	Hz	≤±0.01
		Active power	%	≤±1
		Reactive power	%	≤±1
		Power factor	/	≤±0.01
		Active energy	/	0.5s
		Reactive energy	%	≤2
Remote signaling parameters	Remote signaling type		/	Single-point passive remote signaling
	Resolution		ms	≤2
	Debounce time		ms	100-1000 (can be set)
Power supply parameters	Rated voltage		V	AC220/380
	Rated frequency		Hz	50
	Voltage allowable error		%	±20
	Power supply grounding resistance capability		/	1.9Un, continuous operation for 4 hours without damage

Features

Smart Marketing and Distribution:

Meets marketing and distribution business needs, employs container and edge computing technologies, features dual security chips, and serves as a bridge between terminal-side devices and the cloud master station. Supports HPLC collection, 485 communication, and LTE communication.

Key Edge Computing Node:

Possesses all functions of traditional TTUs and concentrators, acting as a crucial edge computing node in power distribution and utilization. It forms the edge layer of the "Cloud-Pipe-Edge-Terminal" architecture for building the low-voltage power distribution IoT, providing edge IoT, status sensing, and data acquisition capabilities.

Modular and Platform-Based:

Adopts a hardware platform, business application-based approach, and modular structure. It can be applied as an intelligent terminal device integrating functions such as sensing operating equipment status in the distribution IoT, electricity data collection, distribution transformer monitoring, communication networking, and localized analysis and decision-making mechanisms.

Operating Conditions

Temperature: -40℃ (min) to +70℃ (max)

Pollution Level: IV

Relative Humidity: 10%-100%

Seismic Grade: 8

Installation Environment: Places free from flammable or explosive hazards and chemical corrosion.