UR Universal Relay Series
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1 GE Digital Energy UR Universal Relay Series Revision 3.50 Release Notes GE ublication Number: GER-4432 Copyright 2009 GE Multilin Overview Summary GE Multilin issues the UR 3.50 release that introduces new improvements for general and protection functions in the UR Family. Highlights of this release include: Common protection and control elements changes and enhancements Ground time overcurrent Synchrocheck Auto-reclose Negative Sequence Directional Non-volatile Latches Sensitive directional power IEEE very inverse curve This document contains the release notes for FW versions 3.50, 3.49 and 3.48 of the Universal Relay (UR) Family. Affected products: B30, C30, C60, D30, D60, F35, F60, G60, L90, M60, T35, T60 Date of release: Jan 6th, 2012 Firmware revision: 3.50 If users have existing UR Family relays installed with older version of firmware, they can download and install this new firmware to benefit from the enhancements described in this release note. If the user does not require these new features and enhancements, no upgrading of the relays is required. 1
2 roducts Affected This release encompasses the following UR Family products: B30 Bus Differential System C30 Controller System C60 Breaker rotection System D30 Line Distance rotection System D60 Line Distance rotection System F35 Multiple Feeder rotection System F60 Feeder rotection System G60 Generator rotection System L90 Line Current Differential System M60 Motor rotection System T35 Transformer rotection System T60 Transformer rotection System Firmware Compatibility The new 3.50 firmware that is a part of this release is compatible with the UR series hardware version The use of the new 3.50 firmware requires the EnverVista UR Setup software to be version 3.40 and higher. GE Multilin advices users to always use the latest version available of the UR Setup software. 2
3 FW 3.50 Release details In the following enhancement descriptions, a revision category letter is placed to the left of the description. Refer to the Appendix at the end of this document for a description of the categories displayed. Common rotection and Control Elements Ground Time Overcurrent elements have been changed to use the correct signal input when set to phasor Applicable: B30, C60, C70, D30, D60, F35, F60, G30, G60, L30, L60, L90, M60, T35, T60 The input setting within the overcurrent elements determines the type of signal input the elements would use for its operation. hasors or RMS current can be set to the input setting. Changes to the ground time overcurrent elements ensure they operate based on the ground current phasor magnitude when their input setting is phasor. revious FW versions have the ground time overcurrent elements operating based on the RMS current value whether RMS or phasor were set to the input setting The Synchrocheck elements have been changed to correctly detect a dead source when set to DV1 XOR DV2 Applicable: C60, D30, D60, F60, G30, G60, L30, L60, L90, N60, T60 When the Dead Source Select setting within the Synchrocheck element is set to DV1 XOR DV2, the element has to determine two conditions: a) one of the sources is dead evaluating existing voltage vs. the Dead V1/2 Max Volts setting, and b) the other source is live evaluating existing voltage vs. the Live V1/2 Min Volts setting. revious FW versions have the synchrocheck elements verifying dead source by evaluating the existing voltage vs. the Live V1/2 Min Volts setting when set as mentioned above. And then the element incorrectly declares dead source. Changes to the Synchrocheck elements ensure they evaluate the existing voltage vs. the right setting. This issue does not affect customers who have the Dead Source Select setting set different to DV1 XOR DV The Autoreclose element has been changed to ensure it goes to lockout state when the element is blocked and unblocked while in reclose in progress Applicable: D30, F35, F60, L30 If the operand set to the AR Block setting is activated when a reclose cycle is in progress, the autoreclose element goes to Lockout state. 3
4 However, if while in such conditions the AR Block is subsequently removed, previous FW versions may allow the reclose element to execute reclose shots. Changes to the autoreclose element ensure the element will stay on lockout state when the described conditions are present The Non-Volatile Latches elements have been changed to ensure they will maintain the output status when cycling power to the relay Applicable: B30, B90, C30, C60, C70, D30, D60, F35, F60, G30, G60, L30, L60, L90, M60, N60, T35, T60 Changes to the Non-volatile Latches ensure those elements will maintain the output status (on or off) when the relay is power off and on. revious FW versions could allow the elements output to momentarily change state when the relay power is cycled. Customers using the non-volatile Latches for protection or control purposes are advised to upgrade their relays FW version Changes on the Time Overcurrent Elements TOC ensure correct operation time when the relay status is change from Not rogrammed to rogrammed Applicable: B30, B90, C60, C70, D30, D60, F35, F60, G30, G60, L30, L60, L90, M60, N60, T35, T60. All TOC elements have been modified to ensure the element is inactive when the relay is in Not rogrammed status. revious FW versions allow the TOC elements to run while in the described condition, so if there were a fault while changing the relay status to rogrammed (setting change required), the TOC elements may operate faster than specified. Standard maintenance procedures request users to block or disconnect trip commands (Eg. through test blocks, freezing contact outputs, etc) while working on the protective relays. If your procedures do not fulfill this, upgrading your devices firmware version is advisable. All previous FW versions are affected M Sensitive directional power element to correctly update its actual value when the element is in blocked state. Applicable: G30, G60, F60, M60, N60 This firmware version ensures that sensitive directional power actual value shown by the relay is properly updated when the sensitive directional power element is blocked. revious firmware versions allow this value to freeze on the value the relay showed just before the element was blocked. This issue doesn t affect the correct operation of the protection element, just the power value that is shown. 4
5 Changes to the IEEE Very Inverse overcurrent curve ensure accurate tripping times when configured with very low pickup value Applicable: B30, C60, C70, D30, D60, F35, F60, G30, G60, L30, L60, L90, T35, T60. This FW version introduces changes to the IEEE Very Inverse Overcurrent Curve that make its operating time to better match the specification when the configured pickup value is lower than 0.1 per unit. Devices with previous FW versions can operate faster than the specified time under such conditions. Users which Time Overcurrent applications require pickup values higher than 0.1 per unit, are not affected by this issue, and then a firmware update is not required. 5
6 (revious) FW 3.49 Release details In the following enhancement descriptions, a revision category letter is placed to the left of the description. Refer to the Appendix at the end of this document for a description of the categories displayed. L90 Line Differential F L90 was improved to ensure the line differential element reads all the required sources when switching settings groups and having more than one local current source. Applicable: L90. The 87L element can be set to use up to four local current sources signal sources (e.g. breaker and a half schemes where two CTs are connected to a single L90). When the 87L element is set to use more than one current source and the setting group is changed, the 87L element might read only the first current source (signal source 1). This firmware version improves the setting group change routine to guarantee that all the current sources set to the differential element are read when switching from one setting group to another one. If the L90s in your line differential scheme are connected to a single CT source on both terminal or use a single setting group, no action is required. If the L90s in your line differential scheme are connected to more than one CT source in at least one terminal and more than one setting group is configured, then proceed to update the relay s FW version. U Enhanced two-terminal Inter relay communication ensures 87L goes back to normal after a channel fail is cleared and prevents events flooding Applicable: L90. This firmware version ensures that, for two terminal-single channel applications, the inter-relay communication link goes back to normal once a communication failure is cleared. revious firmware version showed that, channel fail and FLL operands oscillated every 10 seconds when a channel fail alarm had appeared, so the 87L element didn t return to normal operation and the event recorder was flooded. E L90 s redundant inter-relay communication for two-terminal schemes has been changed to ensure the correct data is received by channel two when data in channel 1 is looped back on the multiplexer side (rev. 1) Applicable: L90. This FW version introduces separate-receiving buffers per communication channel to the Inter-relay communication Modules. This ensures that, in redundant two terminal applications when channel one of the multiplexer is in the loopback mode (the data is looped back to the L90 by the multiplexer), any Direct I/O signals sent by the remote L90 relay via the second channel is not overwritten with the channel one looped back data. This could result in losing the Direct I/O signals on the local L90 relay. This firmware release fixes the problem by ensuring the processing and data maintenance of Direct I/O signals are exclusive to each channel. If your line differential scheme is having direct communication between the L90 devices, this issue does not affect them. For customer having schemes with multiplexers, standard maintenance procedures request protection devices to be isolated from the breaker(s) when a function related to the protection elements within the device is being 6
7 tested. If your maintenance procedures fit to this criteria, there is no risk of mis-operation on your system. Otherwise, your device FW version must be upgraded. H L90 s redundant inter-relay communication for two-terminal schemes has been changed to ensure relays in both terminals are still synchronized after performing a loopback test on the multiplexer (rev. 1) Applicable: L90. Some multiplexers available on the market, allow users to perform a loopback test on the local unit while still sending data to remote end. As a consequence L90s with redundant channels and communicating through this kind of multiplexers might lose synchronization between them while one channel is being tested (FLL fail activated) and stay latched in that condition after the test. This FW version adds the ID Fail status to the data stream used for the inter relay communication modules. This ID fail status allows the remote L90 to know that the local L90 channel is under loopback test condition. The remote L90 will then use the data from the other channel (that which is not in loopback) for synchronization. This way synchronization is never lost. If your line differential scheme is having direct communication between the L90 devices, this issue does not affect them. U L90 s inter-relay communication for three-terminal schemes has been changed to ensure communication is restored between all L90 devices when a channel failure condition is cleared (rev. 1). Applicable: L90. As a standard behavior, a three terminal line differential scheme will raise FLL Fail (synchronization) and CH fail operands on all three terminals when both communication channels fail on at least one terminal. However, if only one channel goes back to normal, L90s on all terminals might still show FLL fail and CH Fail, and neither the communication nor the differential protection are restored. This issue affects all relays with FW version 3.48 and/or earlier releases. 7
8 Bus Differential rotection E Bus differential element 87B to prevent mis-operation due to an unblocking command. Applicable: B30. The 87B element has a Block setting that allow users to block the element s operation previous or after a fault condition. If during a block condition that was generated after by the 87B element operation the fault condition is removed and then the block on the element is removed as well, the 87B element misoperates. This firmware release ensures that 87B will not misoperate when the block condition is removed under the described conditions. Users that have the block setting of the differential function set to disable, are not affected by this exception. If the block setting of the differential element is being used, it is recommended to upgrade the firmware. Common rotection and Control Elements F Restricted Ground Fault element to ensure correct operation when phase currents are > 13*CT Applicable: T60, G60 The Restricted Ground Fault element was enhanced to ensure the relay will operate correctly when currents incoming from phase CTs are higher than thirteen times the nominal CT current (13*CT). The Over-excitation element has been modified to meet its time specification Applicable: G30, G60, T60 The Over-excitation element has been enhanced to ensure it will operate according to the time that is claimed on the relay s instruction manual when measured V/Hz values are close to the pickup level. revious firmware version may allow the over-excitation element to operate faster than specified. Users that are have configured this protection element to protect / trip their assets should upgrade the FW version of their devices. F Changes to the Restricted Ground Fault protection Element ensure proper operation when sensing balanced and extremely long DC offset currents. Applicable: T60, G60 The 87RGF element has been modified to improve its selectivity when sensing faults that have long DC constants and relatively low and balanced currents. These conditions may create stability problems to the device, which might mis-operate. If this protection element is configured to trip your asset, we strongly recommend you to upgrade your device s firmware version. 8
9 E Ground distance elements have been improved to increase selectivity when facing three-phase or phaseto-phase faults and remote single pole tripping. Applicable: D30, D60, G60, L90, T60. The ground distance protection algorithm was modified to have an enhanced over-current supervision that incorporates a positive sequence restraint factor. Zero-sequence current is a vital quantity for ground distance elements correct operation. However, spurious zero-sequence current resulting from CT saturation and CT errors, switch-off transients during double-line and three-phase faults and system unbalance, may lead to improper operation of ground distance element. To increase ground distance security during multi-phase faults with specifically low settings of OC supervision, a positive sequence current restraint of 5% was added to over-current supervision. Now current value has to be higher than [In-0,05 x I_1] in order to release ground distance operation. This enhancement allows the ground distance element to deal with ground faults while having a remote single pole open scenario. These changes increase the Ground distance element selectivity ensuring additional tripping security. E Neutral and Negative sequence directional elements 67N and 67_I2 ensure proper selectivity when the negative sequence current value is zero. Applicable: C70, D30, D60, F60, G60, L90, M60, T60. Neutral directional element 67N and Negative sequence directional element 67_I2 have an additional supervisor unit that blocks these protection elements if either the polarizing voltage or the operating current are below the cutoff levels. Current and voltage cutoff levels are defaulted at 0.02pu. Communications E Faster Data File Transmission Applicable: B30, C30, C60, D30, D60, F35, F60, G60, L90, M60, T35, T60. UR Relays now use the TFT ports to transmit data files reducing the transmission time. E.g. event records, oscillography, fault reports, data logger. C UR Ethernet communication port has been enhanced to better handle romiscuous Mode when most of protection and control elements within the relay are being used Applicable: B30, C30, C60, D30, D60, F35, F60, G60, L90, M60, T35, T60 Changes done to the UR Ethernet ort and GSSE communication protocol prevent UR devices from going into promiscuous mode, and then inaccurately generating System Exception self-test error messages. revious firmware version may allow the relay to generate the system Exception message when most of the protection and control elements and the GSSE protocol were enabled. R DN 3.0 and IEC protocols have been modified to ensure an accurate time stamping of binary signal Applicable: B30, C30, C60, D30, D60, F35, F60, G60, L90, M60, T35, T60. The binary point scan routine of DN 3.0 and IEC protocols was improved for correctly time stamping. 9
10 revious FW version might show a difference of +/- 2ms between the relay s SOE and DN/IEC 104 time stamp. UR devices which FW version is 4.80 or later are not affected by this issue. latform D reventing programmable push buttons from latching up when pressing more than one simultaneously Applicable: B30, C30, C60, D30, D60, F35, F60, G60, L90, M60, T35, T60 The Internal control algorithm of programmable push buttons was improved to ensure that none of them would latch when more than one buttons are pressed simultaneously. 10
11 (revious) FW 3.48 Release details In the following enhancement descriptions, a revision category letter is placed to the left of the description. Refer to the Appendix at the end of this document for a description of the categories displayed. E Cold load pickup: blocking feature of the cold load pickup element modified roducts affected: F60 relay The 3.48 release provides additional flexibility to the blocking signal of the cold load pickup element. In addition to stopping the element and resetting the previously asserted CLD LOAD O operand, the blocking feature now applies a reset to the outage timer. This modification helps to avoid situations when removal of the previously set blocking signal might cause the undesirable assertion of the CLD LOAD O operand caused by the outage timer timing-out despite the cold load pickup element blocking. C Communications: improvements to remote input and direct input default states Applicable to: all UR-series relays The operation of the remote and direct inputs has been improved to prevent the status of the remote and direct inputs from toggling from the ON state to it's default OFF for 1/8th of a cycle when the sending relay goes Offline. This toggling of the remote and digital input state did not occur if the default state of the input was set to OFF. C Communications: L90 two-terminal peer-to-peer communications improved roducts affected: L90 relay The L90 peer-to-peer communications has been improved to ensure that the local relay will be able to establish a FLL LOCK on a two-terminal system after power has been cycled on the remote relay. In the previous revision, the local L90 would occasionally to not be able to establish the FLL LOCK upon cycling power on the remote relay. This issue did not affect operation in a three-terminal configuration. R Fault report: units for fault and pre-fault magnitude and angle added roducts affected: C60, D30, D60, F60, and L90 relays The fault report feature was enhanced to add units for the voltage and current magnitude and angle to the fault report text files. FlexElements : error handling large values in FlexElements fixed roducts affected: UR-series platform In previous releases, FlexAnalog data points exceeding 31 bits in magnitude (or 2,147,483,648) could be falsely represented in the internal logic of the FlexElement protection element. This issue has been resolved for the 3.48 release. E Internal enhancement: CT/VT module diagnostics roducts affected: UR-series platform The UR-series relays have been enhanced to provide additional security by adding the ability of detecting failed cells within the CT/VT processing core and taking appropriate action to ensure that no maloperation occurs. 11
12 When this problem is detected, the relay will create a DS ERROR event, and display a HARDWARE FAILURE message on the front panel. The relay will be taken offline, thus suspending operation of the device and its trip contacts. lease consult the factory for details should this occur. G Internal enhancement: enhanced CT/VT module data and program integrity roducts affected: UR-series platform The UR-series relays have been enhanced to provide additional security by ensuring that the settings used by the CT/VT module for calculations are correct and have not been corrupted. If the main processor determines that CT/VT settings are not as expected, it will reload the proper settings, thereby preventing the chance of a protection element maloperating do to using invalid data. In the event that the CU detects this occurrence, it will display a message on the front panel stating Settings Change or M Checksum, as well as recording a DS ERROR event in the event record. R Overfrequency: delay in the operate state of the overfrequency protection element corrected roducts affected: F60, G60, and T60 relays The operation of the overfrequency element was improved to correct a ½ cycle delay that would appear in the assertion and dropping out of the operate (O) flag when the pickup or reset delay was set to 0. H Stator ground: stator ground protection element failure to trip fixed roducts affected: G60 relay The operation of the stator ground protection element has been corrected to resolve an issue that would cause the element to fail to trip under valid system conditions after control power to the relay has been cycled. In the previous versions that this occurred in, after control power was cycled, changing any of the settings for the stator ground protection element would allow it to operate properly. Synchrocheck: per-unit discrepancy corrected roducts affected: C60, D30, D60, F60, G60, L90 The synchrocheck element has been improved to use the correct per unit value when the element has been configured to operate using phase-to-phase voltages. Under certain combinations of settings, the synchrocheck element would use the phase-to-ground per unit value instead of the phase-to-phase value. This issue did not affect relays configured to operate using phase-to-ground voltages. Transformer differential: inaccurate phase angle compensation for some combination of transformer settings roducts affected: T35 and T60 relays The operation of the transformer differential element has been improved to properly calculate the differential and restraint currents for a relay configured to protect transformers that are grounded Not Within Zone and have a phase compensation between 60 to 180 or 240 to 0. In the previous version, the relay calculated the two signals with a degree of error out of specification that could adversely affect the performance of the protection element during external faults. The degree of error in the calculations varied depending different setting permutations applied; please contact the factory for analysis of the errors under specific transformer configuration. This issue did not affect relays that were configured to have grounding Within Zone. 12
13 Upgrade paths It is our recommendation that all customers upgrade to the latest version of UR-series firmware to take advantage of the latest developments and feature enhancements. Firmware upgrades can be easily preformed using the EnerVista UR Setup software. This software can also convert settings files from an older version to the latest version and provides a Difference Report once the conversion has been completed. This Difference Report identifies new settings and additional information to assist the user during the upgrade. Upgrade path for versions 4.00 and above For UR-series devices installed with versions 4.00 firmware and above, the latest FW release can be uploaded to the relay using the EnerVista UR Setup software. Upgrade path for revisions below version 4.00 For UR-series devices installed with versions of firmware below 4.00, an upgrade package must be obtained from GE Multilin to upgrade the relay CU and CT/VT modules. Benefits of revision 4.00 and above: Some benefits of revision 4.00 and above are as follows: Supports many new features and functionality IEC communications protocol 100 Mb Ethernet IRIG-B repeater Isolated RS485 and IRIG-B Synchrophasors in the D60, L90, N60 & G60 Support for Breaker-and-a-Half Transmission Line rotection (D60, L90) Motor Health Diagnostics (M60) Enhanced Front anel and many others Exceeds new IEEE C37.90 requirements - Transient immunity (2 to 4 kv) 13
14 Appendix Change categories This document uses the following categories to classify the changes. Table 1: Revision categories Code Category Comments N New feature A separate feature added to the relay. Changes to existing features even if they significantly expand the functionality are not in this category G Change A neutral change that does not bring any new value and is not correcting any known problem E Enhancement Modification of an existing feature bringing extra value to the application D R Changed, incomplete or false faceplate indications Changed, incomplete or false relay records Changes to, or problems with text messages, LEDs and user pushbuttons Changes to, or problems with relay records (oscillography, demand, fault reports, etc.) C rotocols and communications Changes to, or problems with protocols or communication features M Metering Metering out of specification or other metering problems rotection out of specification rotection operates correctly but does not meet published specifications (example: delayed trip) U Unavailability of protection rotection not available in a self-demonstrating way so that corrective actions could be taken immediately H Hidden failure to trip rotection may not operate when it should F False trip rotection may operate when it should not B Unexpected restart Relay restarts unexpectedly The revision category letter is placed to the left of the change description. GE Multilin technical support GE Multilin contact information and call center for product support is shown below: GE Multilin 215 Anderson Avenue Markham, Ontario Canada L6E 1B3 Telephone: or (North America), (Europe) Fax: (North America), (Europe) multilin.tech@ge.com Home age: 14
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