Pomanique Electric Co., Ltd. 
Product Overview
Controller
The Microprocessor Based controller provide protection, control, monitoring, instrumentation and metering with integrated input and output logic, data logging & fault reports.
Communication access to controller functionality is via electrical RS485 port for remote connection. Additional rear port options including RS232 port is available.
The controller is mounted in the control cubicle. Along with the controller, this cubicle also contains the auxiliary power supply with batteries for uninterruptible power supply, electronic boards and circuit breakers.
The controller contains a large number of protection functions (elements) which can be selected or deselected through the menu driven display.
Introduction
Recloser unit is connected serially to distribution line to operate open / close of the line, and Controller is in charge of measurements of currents, voltages, and other electric values, protection, control, status monitoring, recording, and communication.
In distribution power grid, Feeder Terminal Unit (FTU) is the key point to realize feeder automation. Its main function is to realize Fault Detection, Isolation and Restoration (FDIR), reducing outage time, improving reliability of power supply. Such as Recloser, Sectionalizer, and Line Fuse are adopted. Among these devices, Automatic Circuit Recloser is the most important protection device, whose main functions are fault current trip and auto reclosing.
With the continuously development of distribution automation worldwide, more and more Feeder Protection Relays are applied in overhead lines, while protecting feeder, implementing local or centralized fault self-recovery control, and by communication network, connecting to SCADA system, realizing remote functions.
This Technical Manual applies to the following range of products manufactured by Pomanique Electric :
Get an RTU-350 quote for your project
Share your protection requirements, communication interface and control-cubicle needs with Pomanique. Discuss the RTU-350 configuration and request a project quotation.
Technical specifications
Main features of RTU-350 controller are as follows:
Protection :
● Three-phase Non-directional Over-current Protection (ANSI 50/51)
● Non-directional Earth-fault Protection (ANSI 50N/51N)
● Three-phase Directional Over-current Protection (ANSI 67)
● Directional Earth-fault Protection (ANSI 67N)
● Sensitive Earth-fault Protection (ANSI 64N)
● Broken Conductor Protection (ANSI 46BC)
● Inrush restraint Function (ANSI 68)
● Negative-sequence over-current Protection (ANSI 46)
● Three Phase Over-voltage Protection (ANSI 59)
● Three Phase Under-voltage Protection (ANSI 27)
● Negative-sequence Over-voltage Protection (ANSI 47)
● Residual Over-voltage Protection (ANSI 59G)
● Over-frequency Protection (ANSI 81H)
● Under-frequency Protection (ANSI 81L)
● Rate of Change of Frequency Protection (ANSI 81R)
● Circuit Breaker Failure Protection (ANSI 51BF)
● Fault Locator (ANSI FLOC)
● Loss of Phase Function
● Cold Load Pickup Function
● Duty Cycle Monitoring Function
● Phase Reverse Detection Function
● Hot Line Tag
● 5 Setting Groups
Measurements :
● Phase, Ground and Sensitive Ground Current (Ia, Ib, Ic, Io, I0)
● Line and Phase Voltage on power and load side (Ua, Ub, Uc, Ur, Us, Ut)
● Residual Voltage on power and load side (Uo1, Uo2)
● Single and Three Phase Active Power (Pa, Pb, Pc, Pt)
● Single and Three Phase Reactive Power (Qa, Qb, Qc, Qt)
● Single and Three Phase Apparent Power (Sa, Sb, Sc, St)
● Single and Three Phase Active Energy (EPa, EPb, EPc, EPt)
● Single and Three Phase Reactive Energy (EQa, EQb, EQc, EQt)
● Single and Three Phase Apparent Energy (ESa, ESb, ESc, ESt)
● Single and Three Phase Power Factor (PFa, PFb, PFc, PFt)
● Frequency Magnitude and Rate (F)
● Sequence Components of Three Phase Voltages & Currents (I1, I2, Io, U1, U2, Uo)
● True RMS, Harmonics up to 11st and THD of Voltages & Currents
● Demand Currents, Voltages, Power, Energy, Power Factor, Frequency and Harmonics
● Power Quality, Load Profile, Disturbance Recorder Graphs for Analysis
● Battery Voltage (Vdc)
Control :
● Open and Close
● Local and Remote
● Reclosing Function (ANSI 79)
● Zone Sequence Coordination
● High Current Trip/Lockout
● Synchronization Check Function (ANSI 25)
● Battery Activation
● Battery Test (Healthy Condition)
● Lamp Test
● Authorization Setting
● Clear Indications, Events, Fault Records, Disturbance Records, Power Quality, Load Profile
● Function Enable/Disable: Reclosing, Protection, Group Setting, Hot Line Tag
Monitoring:
● Protection Start, Trip and Alarm
● Measurement High Alarm and Warn
● Trip Counter Limit
● Open/Close Status
● Local/Remote Status
● AC Fail & DC Fail
● Battery Low Alarm
● Battery Activation Status
● Battery Condition
● Door Open Alarm
● Device Internal Fail
Distribution Automation
● Loop Automation Scheme
● Auto-changeover Scheme
Recording :
● Trip and fault counter
● System Event Recorder – last 10,000 events
● Fault Recorder – last 1,024 faults
● Load profile recorder – last 30 days
● Disturbance Recorder – Maximum 500 cycles ×10 (128 samples/cycle)
Communication Protocols :
● Front Panel RJ45 Ethernet Port: IEC104 protocol for debugging
● Rear Panel RS232 & RS485/232 Serial Port: IEC101/DNP3.0/Modbus for remote
● Rear Panel RJ45 Ethernet Port: IEC61850/IEC104/DNP3.0/Modbus for remote
User Interface
● Large LCD (10 lines * 20 characters)
● Fault Indicators
● 16 Programmable LEDs
● 10 Programmable buttons
● Access Security(Passcode)
● RJ45 Ethernet Debugging Port
Manufacturing
Production & quality control
Reception, production, testing and shipment areas are organized to keep technical requirements, work progress and delivery records aligned.
Workplace & Customer Reception
Visitors and project teams have a clear place to review requirements, drawings and delivery details before work moves forward.
Organized Production Lines
Defined work areas and orderly material flow help teams keep assemblies, components and order information aligned.
Testing & Verification
Routine checks and functional verification are completed against approved requirements before release.
Shipment & Delivery
Finished orders are checked, protected and organized for traceable handover and coordinated dispatch.
Qualification & Certification
Built for recognised standards. Our documentation package supports project review with internationally recognised safety, quality and environmental marks.
About Pomanique
Pomanique Electric supplies medium-voltage switching, protection, insulation, control and transformer equipment for utilities, contractors, distributors and industrial projects.
Our product range covers reclosers, circuit breakers, load break switches, surge arresters, fuses, composite insulators, controls and relays.
Project requirements are reviewed before production, including ratings, installation conditions, interfaces and documentation. Assembly checkpoints, routine verification and final checks cover the agreed configuration, nameplates, accessories and packing before shipment.
Exhibitions & customer visits
Meeting customers and project teams
Product presentations and technical exchanges with distributors, contractors and utility customers.
OEM / ODM support
Tell us which model you need, what should change and your order quantity. Share drawings or project specifications so our team can review the details.
Product marking & packing
Provide your logo, nameplate details and packing requirements for review with the order.
Mounting & connections
Share mounting dimensions, terminal positions and reference drawings to check the proposed fit.
Control & communication
Specify the control supply, accessories and communication functions required by your application.
Drawings & test records
List the data sheets, wiring diagrams and test records needed for your project review.
Documents
Downloads
Request the catalogue, wiring diagram and relevant test records.
Ordering information
Technical review
Application, installation conditions, control supply and communication requirements.
Documents
Data sheet, drawings, wiring diagram and applicable test records.
Commercial scope
Configuration, quantity, destination, inspection and delivery schedule.
OEM / ODM
Confirm customization, feasibility and approved drawings before production.
After-sales support
Support for your equipment
Contact our team for document clarification, troubleshooting or spare-parts assessment. Support scope is reviewed for your product and project.
Technical assistance
Send the model, nameplate, site conditions and a clear description of the issue.
Spare parts & replacement
Share the serial number, photos and part reference so availability and compatibility can be reviewed.
Project & site support
Training and site-service requests are evaluated against the equipment, location and schedule.
Explore the range
Related products
Technical Support
Frequently Asked Questions
Clear guidance on selection, documentation, customization and project delivery.
What information should I provide for product selection?
Please provide the application, system rated voltage and frequency, continuous load current, short-circuit level, insulation level or BIL, and the required operating duty. Also include indoor or outdoor installation, altitude, ambient temperature, pollution level, control voltage, communication requirements, quantity, destination market and applicable standard. A single-line diagram, existing nameplate or project specification will make the review more accurate.
How do I choose between a recloser, circuit breaker, load break switch, disconnector and fuse?
A recloser is generally used for automatic fault interruption and service restoration on distribution feeders. A circuit breaker provides repeated fault interruption, a load break switch is intended for rated-load switching within its specified capability, a disconnector provides an isolation point, and a fuse provides single-operation overcurrent protection. The final choice must be based on load current, fault level, protection coordination, switching frequency, installation method and operating philosophy.
Which ratings and standards must be confirmed before ordering?
Confirm the voltage class, frequency, rated current, short-circuit breaking and making duties, insulation level, creepage distance, mechanical or electrical endurance, enclosure protection, control supply and auxiliary contacts. The applicable IEC, IEEE, ANSI, GB or project-specific requirement should be stated in the inquiry. The approved data sheet and drawing, rather than only a general product family name, define the final supply.
Can Pomanique help replace existing equipment or confirm interchangeability?
Yes, a technical comparison can be made when sufficient information is available. Please send the existing model and nameplate, general arrangement and mounting dimensions, terminal interfaces, wiring diagram, interlocks, operating mechanism and electrical ratings. Similar voltage and current ratings do not by themselves confirm mechanical or electrical interchangeability, so approval is required before replacement.
How are surge arresters and composite insulators selected?
Selection should consider the system grounding method, maximum continuous operating voltage, temporary overvoltage, required protective level, system insulation level, altitude, pollution severity and creepage distance. Mechanical loading, housing material and installation orientation also matter for outdoor equipment. Provide the system and site data so insulation coordination can be reviewed as a complete set.
Are OEM, ODM and customized configurations available?
Customization can be evaluated according to technical feasibility, validation requirements and order quantity. Typical requests include labels and packaging, terminal arrangements, mounting dimensions, control voltages, transformer ratios, accessories, communication functions and project documentation. Customized production should begin only after the technical specification and approved drawings are confirmed by both parties.
Product Enquiry
For an RTU-350 quotation, please include:
- Required configuration and communication interface
- Quantity and destination
- Drawings or project specification, if available
