Thus, in order to cause a trip on loss of control power to the , the Trip relay should be programmed as fail-safe. See the figure below for typical wiring of contactors and breakers for fail-safe and non-fail-safe operation.
Output relays remain latched after activation if the fault condition persists or the protection element has been programmed as latched. This means that once this relay has been activated it remains in the active state until the is manually reset. The Trip relay cannot be reset if a timed lockout is in effect. Lockout time will be adhered to regardless of whether control power is present or not. The Emergency Restart feature overrides all features to reset the The rear of the relay shows output relay contacts in their power down state.
In locations where system voltage disturbances cause voltage levels to dip below the control power range listed in specifications, any relay contact programmed as fail-safe may change state.
Note 2. The RS ports are isolated as a group. For larger systems, additional serial channels must be added. Commercially available repeaters may also be used to increase the number of relays on a single channel to a maximum of Note that there may only be one master device per serial communication link.
Connections should be made using shielded twisted pair cables typically 24 AWG. Suitable cables should have a characteristic impedance of ohms e. Belden and total wire length should not exceed ft. Commercially available repeaters can be used to extend transmission distances.
Voltage differences between remote ends of the communication link are not uncommon. For this reason, surge protection devices are internally installed across all RS terminals. Internally, an isolated power supply with an optocoupled data interface is used to prevent noise coupling. To ensure that all devices in a daisy-chain are at the same potential, it is imperative that the common terminals of each RS port are tied together and grounded in one location only, at the master.
Failure to do so may result in intermittent or failed communications. Correct polarity is also essential. Each relay must be daisy-chained to the next one. Avoid star or stub connected configurations. Observing these guidelines will result in a reliable communication system that is immune to system transients. Messages are displayed in plain English and do not require the aid of an instruction manual for deciphering. While the keypad and display are not actively being used, the display will default to user defined status messages.
Any trip, alarm, or start inhibit will automatically override the default messages and appear on the display. Setpoint files may be created at any location and downloaded through this port using the EnerVista Setup software. Local interrogation of Setpoints and Actual Values is also possible. New firmware may be downloaded to the flash memory through this port.
Each page is broken down further into logical subgroups of messages. The [PAGE] up and down keys may be used to navigate through the subgroups. It is used to enter the subgroups or store altered setpoint values. It may be used to exit the subgroups or to return an altered setpoint to its original value before it has been stored. To enter setpoints, select the desired page header. There is also a Setpoint Passcode feature that may be enabled to restrict access to setpoints.
The passcode must be entered to allow the changing of setpoint values. A passcode of 0 effectively turns off the passcode feature and only the access jumper is required for changing setpoints. If no key is pressed for 30 minutes, access to setpoint values will be restricted until the passcode is entered again.
The passcode cannot be entered until terminals 57 and 58 access terminals are shorted. Setpoint changes take effect immediately, even when motor is running. It is not recommended, however, to change setpoints while the motor is running as any mistake could cause a nuisance trip. Refer to the Instruction Manual for a detailed description of the setpoint access procedure.
It may be required during upgrading. Z Click the Install Now button and follow the installation instructions to install the no-charge enerVista software on the local PC. Z When installation is complete, start the enerVista Launchpad application.
Z Once the download is complete, double-click the installation program to install the EnerVista Setup software. The program will request the user to create a backup 3.
Z Select the complete path, including the new directory name, where the EnerVista Setup software will be installed. Z Click on Next to begin the installation. The files will be installed in the directory indicated and the installation program will automatically create icons and add EnerVista Setup software to the Windows start menu.
The device will be added to the list of installed IEDs in the enerVista Launchpad window, as shown below. This example demonstrates an RS connection. Refer to the F manual for additional details. To configure the relay for Ethernet communications, see Configuring Ethernet Communications on page 3— See the previous section for the installation procedure. Z Click the Add Site button to define a new site.
Z Enter the desired site name in the Site Name field. If desired, a short description of site can also be entered along with the display order of devices defined for the site. Z Click the OK button when complete.
The new site will appear in the upper-left list in the EnerVista Setup window. Z Click the Add Device button to define the new device.
Z Enter the desired name in the Device Name field and a description optional of the site. This will display a number of interface parameters that must be entered for proper RS functionality.
Z Enter the physical communications parameters baud rate and parity settings in their respective fields. Z Click the Read Order Code button to connect to the device and upload the order code.
If an communications error occurs, ensure that the serial communications values entered in the previous step correspond to the relay setting values. Z Click OK when the relay order code has been received. The new device will be added to the Site List window or Online window located in the top left corner of the main EnerVista Setup window.
The Site Device has now been configured for serial communications. Proceed to Connecting to the Relay on page 3—25 to begin communications. The following window will appear when the Quick Connect button is pressed: As indicated by the window, the Quick Connect feature quickly connects the EnerVista Setup software to a front port with the following settings: baud, no parity, 8 bits, 1 stop bit.
Select the PC communications port connected to the relay and press the Connect button. The EnerVista Setup software will display a window indicating the status of communications with the relay. The properties of this new site cannot be changed. The Site Device has now been configured via the Quick Connect feature for serial communications.
Z Select Ethernet from the Interface drop-down list. This will display a number of interface parameters that must be entered for proper Ethernet functionality.
If an communications error occurs, ensure that the Ethernet communications values entered in the previous step correspond to the relay and MultiNET setting values. The Site Device has now been configured for Ethernet communications. Interactive Motor Training CD. Motor Protection Innovations. Support Documents. Application Notes. Multilin Integrated protection and control for medium sized AC motors.
The modbus protocol defines function codes of 1 to The implements some of these functions. A CRC error indicates than one or more bytes of the transmission were received incorrectly and thus the entire transmission should be ignored in order to avoid the performing any incorrect operation. Commands 1 to 4 can also be sent using Modbus function code 5 Execute Operation. Setpoints can be read and written by a master computer.
Actual Values are read-only. All setpoints and actual values are stored as two-byte values. That is, each register address is the address of a two- byte value. Page Logger , it will automatically be reset by the Relay relay to 0. The Trace Memory Trigger is set up in S1 Preferences and determines how many pre-trip and post- trip cycles are stored. Page 49 F for the available parameters to be continually recorded at a defined rate of between 1 and seconds.
All data will be lost upon loss of the control power. Although it's maximum range is , the will only retain up to the latest 50 records.
Page 77 Speed 2 Undercurrent Alarm Level 0. Keep all ground leads as short as possible. At all times, equipment ground terminal must be grounded during device operation and service.
This product requires an external disconnect to isolate the mains voltage supply. CTs must be shorted prior to working on CT circuits on the Spa: Hotel: Ext Spa: Hotel: Ext shakina parkregis-.
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