Controller Overview
The 505HT is field programmable, which allows a single design to be used in many different control applications and reduces both cost and delivery time. It uses a built-in graphical user interface (GUI) with multi-lingual menu-driven screens to instruct site engineers on configuring the control to a specific application. The 505HT can be configured to operate as a stand-alone unit or in conjunction with a plant’s Distributed Control System.
Designed for hydro turbine control, the 505HT control includes five PID controllers (Offline, Online, Baseload, Online Isochronous, and Online Load Sharing), start-up routine, and multiple protection functions overspeed, Small System Detection, etc.), which can be configured by a user depending on the specific turbine application’s requirements. Users can configure the 505’s different PID controllers, start routines, discrete and analog I/O functions, and protection levels themselves without the need for a special control engineer. A first-out indication feature for system shutdowns reduces troubleshooting time. Once configured, the 505HT performs a configuration check routine to ensure that the programmer did not make any basic configuration mistakes.
This control is exclusive for Pelton Turbines up to 6 (six) nozzles. The Actuator output 1 is dedicated to nozzle 1, and the actuator output 2 is dedicated to nozzle 2. If the turbine has more than 2 nozzles, it is necessary to use analog outputs to the other nozzle(s). The front panel ESTOP button will shut down the actuator’s circuits 1 and 2, so if this is not desired by the control, configure the analog outputs for this function.
The nozzle routine has the option to rotate the nozzles in some conditions. The conditions are:
Nozzle fail: If a nozzle is selected and this specific nozzle has a signal fault or a mismatch between demand and position, the rotation will be done.
Operator command: The operator can give a command to rotate nozzles at any time. The command can be issued by the frontal HMI or Modbus.
Timer: The rotation can be done by timer (in hours). The timer is initiated every time a new start command is issued and accepted by the control or an operator rotation command is issued.
Operator Control Panel
The 505HT is a field-configurable hydro turbine control and operator control panel (OCP) integrated into one package. A comprehensive graphical operator control panel display and keypad are located on the 505HT’s front panel. This display can be used to configure the 505, make online program adjustments, and operate the turbine/system.
Features
The 505HT provides the following features:
Start / Stop / unload routines
Black Start routine
Feed-forward control
Speed Control / Droop Control (kW and Position) / Baseload
Manual Control (Individual nozzles manual control)
Small System detection logic
Level control (pond or Tail)
Nozzle Sequencing / Rotation
Analog or discrete deflector control
Speed / Load / Nozzle Switches
Nozzle limit
Remote analog setpoints for speed, nozzle, level, power, and manual control
Generator breaker logic
Level switches for: Speed, Nozzle Position, and Load
Integrated first-out problem indicator
Trip and Alarm event recorder
User-friendly menu format
Real-time trend screens
Real-time clock synchronization via SNTP
Ethernet communications
Multi-language capability
Using the 505HT
The 505HT control has three normal operating modes: Configuration Mode, Service Mode, and Run Mode.
Configuration Mode
This mode is used to select the options needed to configure the control to your specific turbine application. While in this mode, the control will force the hardware into IO LOCK, meaning that no outputs will be active, all Relays will be de-energized, and all Analog output signals will be at 0 current. Once the control has been configured, the Configuration mode is typically not needed again, unless there are turbine options or operation changes. It is available to be viewed at any time. A password is required to log in to this mode.
505 Inputs and outputs
Control Inputs
Speed Input Signals: Four speed inputs are available. Two of these are exclusively for MPUs (magnetic pickup units), and the other two are exclusively for active proximity probes.
505HT – LVDC, Pelton Turbines 8200-1400
505HT – HVAC/DC, Pelton Turbines *Documentation: Product Spec: 03460, Manual: 35116 8200-1401
505HT – LVDC, Francis / Kaplan Turbines 8200-1402
505HT – HVAC/DC, Francis / Kaplan Turbines *Documentation: Product Spec: 03461, Manual: 35117 8200-1403
Accessories:
17” TouchPanel OCP – Includes RemoteView Software Program 8269-1073
RemoteView - Software License 8928-5311
Old 505 to New 505 Retrofit Wiring Kit 5404-1801
