This prevents optimally set overcurrent elements from erroneously operating on startup due to inrush curren … Turn the voltage on. If Underfrequency 2 initiation is to be checked, change Underfrequency Restoration to Disabled, Underfrequency 1 to Disabled, Underfrequency 2 to Trip and repeat Steps 2 through 8.
The following procedure checks the minimum voltage for underfrequency restoration: 1. Assert or De-assert a logic input to simulate an open breaker. Set U … The element should not generate an output. The Indications and Operations are as out … Pulses occur at the end of each programmed interval. Upon power up of the relay the Pulse Output function, if enabled, will continue from where i … The remainder of this manual should be read and kept for reference to ensure maximum benefit from the and For further information, please consult your local sales representative or the factory.
Comments about new features or modifications for your specific requirements are welcome and encouraged. A number is entered one digit at a time with the 0 to 9 and decimal keys. The left-most digit is entered first and the right-most digit is entered last. Page 22 For the previous example, pressing the HELP HELP during setpoint entry displays the corresponding minimum, maximum and step values for the displayed setpoint, as well as contact information if further assistance is required.
Page 24 Once a character is entered by pressing key, it is automatically saved in flash memory as a new ENTER setpoint. Page Application Example Define if the output relays will be set as fail-safe type. If that will be the case, gather information on the conditions that will be used to verify synchronism. Page 26 It also assumes that relay setpoints are unaltered from their factory default values. Refer to the following figures for schematics related to this application example.
Page 32 RTU. Current and voltage measurements are performed at secondary levels, which the relay transforms to primary values using CT and VT ratios, as well as nominal secondary values. Page 36 For the Neutral Instantaneous Overcurrent 1 element, enter the following values in the setpoints page. Page I Nstallation Ready state. Note that the relay is defaulted to the Not Ready state when it leaves the factory.
If this warning is ignored, protection is active and will be using factory default setpoints. Page Commissioning Extensive commissioning tests are available in Chapter : Commissioning.
Even with minimal computer knowledge, this menu-driven software provides easy access to all front panel functions.
Page 40 Chapter 5: Setpoints. The logic diagrams include a reference to every setpoint related to a feature and show all logic signals passed between individual features.
Information related to the selection of settings for each setpoint is also provided. If a stable frequency signal is not available then the sampling rate defaults to the nominal system frequency. Page 44 — of the SR relay. The response time depends on the ratio between the fault current and the applied setting and varies from 16ms for high multiples of pickup to 25ms for multiple of 1. Page 45 Contact inputs are de-bounced to eliminate false operations due to noise.
The inputs must be in the same state for three consecutive readings spaced evenly over one power frequency cycle before a new state is recognized. Page Ordering Conformal Coating 2. Page Specifications 0. Page 50 The harmonic components of current and voltage are removed from the input voltage and current parameters, so all relay measurements based on these quantities respond to the fundamental component only.
Page 53 0 to 1. Page 57 Up to four 4 before lockout. Adjustability: Current supervision can adjust the maximum number of shots to be attempted. Page 58 15 A at V DC for ms 2. Page 63 3. The case provides mechanical protection for the drawout portion and is used to make permanent electrical connections to external equipment.
Page 64 3. Panel cutout dimensions for both conditions shown below. When planning the location of your panel cutout, ensure provision is made for the front door to swing open without interference to or from adjacent equipment.
Page Mechanical Installation To remove the unit from the case: Open the door by pulling from the top or bottom of its right side. It will rotate to the left about its hinges. Page I Nstallation Re-insert the relay into its draw-out case, and engage the handle. Arrange to remove the draw-out from the switchgear by removing the wiring from the terminals. The relay will now slide out of the case when pulled using its handle.
To free the relay, it may sometimes be necessary to slightly adjust the handle position. Page 68 No special ventilation requirements need to be observed during the installation of the unit.
Note The unit does not require cleaning. As such, it is not Layout possible to present typical connections for all possible schemes. The information in this section will cover the important aspects of interconnections, in the general areas of instrument transformer inputs, other inputs, outputs, communications and grounding.
Page C Urrent I Nputs 3. There are no internal ground connections on the current inputs. Current transformers with 1 to A primaries may be used.
Page 74 Restricted Earth Fault protection is often applied to transformers having grounded wye Earth Fault windings to provide sensitive ground fault detection for faults near the transformer neutral. Page 76 A tinned copper, braided, shielding and bonding cable should be used. As a minimum, 96 strands of number 34 AWG should be used.
Belden catalog number is suitable. Page Control Power 52a auxiliary contact is also open and no trickle current will flow. When the breaker position monitoring inputs detect an open breaker, the trip coil supervision monitoring function will be disabled.
A high speed solid state SCR output is also provided. This output is intended for applications where it is required to key a communications channel. Page Analog Input Ensure the maximum burden limits are not exceeded as per relay specifications, and avoid locating wire in close proximity to NOTE current carrying cables, contactors or other sources of high EMI.
Refer to Outputs on page 2—20 for the specifications and Ordering on page 2—9 for the complete listing. Page 81 To ensure maximum reliability, all equipment should have similar transient protection devices installed. A standard 9-pin RS cable is used to connect the relay to a personal computer as shown below. Page Front Panel Interface The control keys are used to select the appropriate message for entering setpoints or displaying measured values.
Page Led Indicators 4. This is when the autoreclose function setpoint is enabled, and if used, the block reclosure logic input is not asserted. Page 88 4. Regardless of the mode of operation, the corresponding front panel indicator turns on while the output relay is signaling. Page 89 Warning Relay signals loss of protection by de-energizing, but the LED indicator remains off.
Since there are no shorting contacts across the Self-Test Warning Relay, both the normally open and normally closed contacts are open when the unit is drawn out. Maintenance alerts indicate excessive use.
Programmable controller should be revised or setpoints adjusted to reduce event recording. Page 92 Any function of the relay is susceptible to malfunction from this failure. Contact Multilin Technical Support. Page 93 This warning occurs when microprocessor self-monitoring Self-Test 2 Major detects task execution failure. Page 96 It can be used while disconnected i.
In off-line mode, settings files can be created for eventual downloading to the device. In on-line mode, you can communicate with the device in real- time. Click Finish to end the installation. Click the OK button when complete. Click the Add Device button to define the new device. Proceed to Connecting to the Relay on page 4—20 to begin communications. EnerVista 8 Series Setup Software provides automated setting file conversion. Once completed, a graphical report is provided to verify and call out any specific settings that may need attention.
Simply remove the terminal blocks and then remove the SR chassis from the panel. No need to disconnect any of the field wiring. Insert the new 8 Series Retrofit chassis into the switchgear and simply plug-in the old terminal blocks - there is no need to make any cut-out modifications or push and pull cables. Protection Relays. Protection and Control. Key Features.
Breaker Conditions The relay calculates the per-phase wear on the breaker contacts to establish a threshold. VT Failure The VT failure feature monitors each phase of input voltage, generating an alarm and sending the programmed output signals when a failure is detected. Analog Inputs Any external quantity may be monitored via an auxiliary current input. Event Recording The relay captures and stores the last events, recording the time, date, cause, and system parameters.
Page 55 s 1 2 3 4 5 6 7 8 9 10 11 12 13 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. Page 56 None 1 2 3 4 5 6 7 8 9 10 11 12 13 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. Page 57 Disabled 1 2 3 4 5 6 7 8 9 10 11 12 13 For explanation of Table footnotes, see the Memory Map Notes at the end of this table.
Page 58 Disabled 1 2 3 4 5 6 7 8 9 10 11 12 13 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. Page 59 1B73 1 2 3 4 5 6 7 8 9 10 11 12 13 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. Page 61 0 to 1 2 3 4 5 6 7 8 9 10 11 12 13 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. Page 65 These registers are new or have changed for version 3.
Page Data Formats Low order word of long value stored in 2nd 16 bits Example: Page 70 Phase Instantaneous Overcurrent 1 Phase Instantaneous Overcurrent 2 1 2 3 4 5 6 7 8 9 10 11 12 13 For explanation of footnotes, see notes of end of Table. Page 83 4 x 8 x 16 x 1 2 3 4 5 6 7 8 9 10 11 12 13 For explanation of footnotes, see notes of end of Table. Page 86 Page 92 Any detected change in the state of any point will cause the generation of an event object. An event object will be generated as a result of any change in any point.
Page 94 When using object 10 to read the status of a Binary Output, a read of points 0 through 2 and 23 will always return zero. For other points, the current state of the corresponding Virtual Input will be returned. Page Modbus. Refer to Accessing Data via the User Map on page for more information. Please note that changes in User Map Values never generate event objects.
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