HIMA H51Q-HRS工控DCS系統備件
4.在以下位置查看數字輸入和跳閘線圈監控的狀態：A1 status×數字輸入輸入預期狀態（開關打開）通過/未通過預期狀態（關閉開關）通過/失敗訪問開路短路測試開路短路啟動器狀態開路短路緊急重啟開路短路遠程復位開路短路可分配輸入1開路短路可指派輸入2開路短路可指定輸入3開路短路可分配輸入4開路短路跳閘線圈監控無線圈GE Multilin 469電機管理繼電器7-7 7測試7.2硬件功能測試7 7.2.7模擬輸入和輸出469模擬輸入和模擬輸出精度規格為滿量程的±1%。執行以下步驟以驗證準確性。用電壓表驗證模擬輸入+24 V DC。a） 4-20毫安1。更改以下設置點：S12模擬輸入/輸出？？模擬輸入1？模擬輸入1:“4-20 mA”S12模擬輸出。電流表上的模擬輸出值應為±0.2 mA。測量的模擬輸入值應為±10單位。使用以下設置點強制模擬輸出：S13 TESTING？TEST analog OUTPUT？Force analog outputs FUNCTION:“Enabled”S13 TESTING？TEST analog OUTPUT？？analog OUTput1 FORCED VALUE：“0%”（以百分比為單位輸入所需值；對模擬輸出2至4重復）3。驗證電流表讀數以及測量的模擬輸入讀數。為了測試的目的，模擬輸入由模擬輸出輸入（參見圖7–1：設定點：S13 TESTING（測試）×TEST output（測試輸出）繼電器的強制操作：“R1跳閘”根據下表選擇并存儲值，驗證操作R6服務繼電器是否故障安全或正常通電，操作是否在每次測試前重置。在每次過載曲線測試之前，立即短接緊急重啟終端，以確保使用的熱容量為零。否則會縮短行程時間。注入適當振幅的電流，以獲得所示值，并驗證跳閘時間。電機負載可在：A2 METERING DATA（測量數據）電流測量3中查看。使用的熱容量和預計跳閘時間可在以下內容中查看：A1狀態電機狀態平均相電流顯示拾取電平預計跳閘時間公差范圍測量跳閘時間1050 A 1.05從不適用1200 A 1.20 795.44秒779.53至811.35秒1750 A 1.75 169.66秒166.27至173.05秒3000 A 3.00 43.73秒42.86至44.60秒6000 A 6.00 9.99秒9.79至10.19秒。10000 A 10.00 5.55秒5.44至5.66秒7-10 469電機管理繼電器GE Multilin 7.3附加功能測試7測試7 7.3.2功率測量測試無功和視在功率規格為Iavg<2×CT時×2×CT×VT×VT滿量程的±1%。執行以下步驟以驗證準確性。1.更改以下設置點：S2系統設置電流傳感相位CT初級：“1000”S2系統設置電壓傳感VT連接類型：“Y型”S2系統安裝電壓傳感電壓互感器比率：“10.00:1”2。按照下表注入電流并施加電壓。驗證測量值的準確性。查看測量值：A2 METERING DATA？？POWER METERING 7.3.3 UNBALANCE TEST 469測量負序電流（I2）與正序電流（I1）的比率。當電機負載超過FLA時，該值作為百分比用作不平衡水平。當平均相電流低于FLA，由于正序電流小得多，而負序電流保持相對恒定，因此降低不平衡值以防止誤跳閘。降額公式為：序列電流，如圖所示：（EQ 7.2）給定上圖中的值，我們得到：（EQ7.3）如果FLA=1000，則：（EQ7.4），由于469不平衡量為：（EQ7.5）469不均衡量精度規格為±2%。執行以下步驟以驗證準確性。1.更改以下設置點：S2系統設置電流傳感相位CT主：“1000 A”S2系統設置電壓傳感×電機滿載振幅FLA：“1000”2。注入下表所示的值，并驗證測量值的準確性。在以下位置查看測量值：A2 METERING DATA（A2測量數據）電流測量注入電流預計不平衡水平測量不平衡水平1 A？？系統相序：“ABC”S9電壓元件？？相位反轉跳閘：“鎖定”S9壓力元件？？相反轉跳閘？？分配跳閘繼電器：“跳閘”2。按照下表施加電壓。驗證電壓相位反轉時的469操作。7.3.5短路測試469短路定時規格為+50 ms。拾取精度根據相電流輸入。執行以下步驟以驗證短路元件的性能。1.更改以下設置點：S2系統設置電流傳感相位CT主：“1000”S
4. View the status of the digital inputs and trip coil supervision in: A1 STATUS ?× DIGITAL INPUTS INPUT EXPECTED STATUS (SWITCH OPEN) PASS / FAIL EXPECTED STATUS (SWITCH CLOSED) PASS / FAIL ACCESS Open Shorted TEST Open Shorted STARTER STATUS Open Shorted EMERGENCY RESTART Open Shorted REMOTE RESET Open Shorted ASSIGNABLE INPUT 1 Open Shorted ASSIGNABLE INPUT 2 Open Shorted ASSIGNABLE INPUT 3 Open Shorted ASSIGNABLE INPUT 4 Open Shorted TRIP COIL SUPERVISION No Coil Coil GE Multilin 469 Motor Management Relay 7-7 7 TESTING 7.2 HARDWARE FUNCTIONAL TESTING 7 7.2.7 ANALOG INPUTS AND OUTPUTS The 469 specification for analog input and analog output accuracy is ±1% of full scale. Perform the steps below to verify accuracy. Verify the Analog Input +24 V DC with a voltmeter. a) 4-20 MA 1. Alter the following setpoints: S12 ANALOG I/O ?× ANALOG INPUT1 ? ANALOG INPUT1: “4-20 mA” S12 ANALOG I/O ?× ANALOG INPUT1 ?× ANALOG INPUT1 MINIMUM: “0” S12 ANALOG I/O ?× ANALOG INPUT1 ?× ANALOG INPUT1 MAXIMUM: “1000” (repeat this value for Analog Inputs 2 to 4) 2. Analog output values should be ±0.2 mA on the ammeter. Measured analog input values should be ±10 units. Force the analog outputs using the following setpoints: S13 TESTING ?× TEST ANALOG OUTPUT ? FORCE ANALOG OUTPUTS FUNCTION: “Enabled” S13 TESTING ?× TEST ANALOG OUTPUT ?× ANALOG OUTPUT 1 FORCED VALUE: “0%” (enter desired value in percent; repeat for Analog Outputs 2 through 4) 3. Verify the ammeter readings as well as the measured analog input readings. For the purposes of testing, the analog input is fed in from the analog output (see Figure 7–1: the setpoint: S13 TESTING ?× TEST OUTPUT RELAYS ? FORCE OPERATION OF RELAYS: “R1 Trip” select and store values as per the table below, verifying operation R6 Service relay is failsafe or energized normally, operating be reset prior to each test. Short the emergency restart terminals momentarily immediately prior to each overload curve test to ensure that the thermal capacity used is zero. Failure to do so will result in shorter trip times. Inject the current of the proper amplitude to obtain the values as shown and verify the trip times. Motor load may be viewed in: A2 METERING DATA ? CURRENT METERING 3. Thermal capacity used and estimated time to trip may be viewed in: A1 STATUS ? MOTOR STATUS AVERAGE PHASE CURRENT DISPLAYED PICKUP LEVEL EXPECTED TIME TO TRIP TOLERANCE RANGE MEASURED TIME TO TRIP 1050 A 1.05 never n/a 1200 A 1.20 795.44 sec. 779.53 to 811.35 sec. 1750 A 1.75 169.66 sec. 166.27 to 173.05 sec. 3000 A 3.00 43.73 sec. 42.86 to 44.60 sec. 6000 A 6.00 9.99 sec. 9.79 to 10.19 sec. 10000 A 10.00 5.55 sec. 5.44 to 5.66 sec. 7-10 469 Motor Management Relay GE Multilin 7.3 ADDITIONAL FUNCTIONAL TESTING 7 TESTING 7 7.3.2 POWER MEASUREMENT TEST The specification for reactive and apparent power is ±1% of ×2 × CT × VT × VT full scale at Iavg < 2 × CT. Perform the steps below to verify accuracy. 1. Alter the following setpoints: S2 SYSTEM SETUP ? CURRENT SENSING ? PHASE CT PRIMARY: “1000” S2 SYSTEM SETUP ?× VOLTAGE SENSING ? VT CONNECTION TYPE: “Wye” S2 SYSTEM SETUP ?× VOLTAGE SENSING ?× VOLTAGE TRANSFORMER RATIO: “10.00:1” 2. Inject current and apply voltage as per the table below. Verify accuracy of the measured values. View the measured values in: A2 METERING DATA ?× POWER METERING 7.3.3 UNBALANCE TEST The 469 measures the ratio of negative sequence current (I2) to positive sequence current (I1). This value as a percent is used as the unbalance level when motor load exceeds FLA. When the average phase current is below FLA, the unbalance value is derated to prevent nuisance tripping as positive sequence current is much smaller and negative sequence current remains relatively constant. The derating formula is: sequence current as shown: (EQ 7.2) Given the values in the figure above, we have: (EQ 7.3) If FLA = 1000, then: (EQ 7.4) and since the 469 unbalance is: (EQ 7.5) The 469 specification for unbalance accuracy is ±2%. Perform the steps below to verify accuracy. 1. Alter the following setpoints: S2 SYSTEM SETUP ? CURRENT SENSING ? PHASE CT PRIMARY: “1000 A” S2 SYSTEM SETUP ? CURRENT SENSING ?× MOTOR FULL LOAD AMPS FLA: “1000 A” 2. Inject the values shown in the table below and verify accuracy of the measured values. View the measured values in: A2 METERING DATA ? CURRENT METERING INJECTED CURRENT EXPECTED UNBALANCE LEVEL MEASURED UNBALANCE LEVEL 1 A ?× SYSTEM PHASE SEQUENCE: “ABC” S9 VOLTAGE ELEMENTS ?× PHASE REVERSAL ? PHASE REVERSAL TRIP: “Latched” S9 VOLTAGE ELEMENTS ?× PHASE REVERSAL ?× ASSIGN TRIP RELAYS: “Trip” 2. Apply voltages as per the table below. Verify the 469 operation on voltage phase reversal. 7.3.5 SHORT CIRCUIT TEST The 469 specification for short circuit timing is +50 ms. The pickup accuracy is as per the phase current inputs. Perform the steps below to verify the performance of the short circuit element. 1. Alter the following setpoints: S2 SYSTEM SETUP ? CURRENT SENSING ? PHASE CT PRIMARY: “1000” S6 CURRENT ELEMENTS ? SHORT CIRCUIT TRIP ? SHORT CIRCUIT TRIP: “On” S6 CURRENT ELEMENTS ? SHORT CIRCUIT TRIP ?× ASSIGN TRIP RELAYS: “Trip” S6 CURRENT ELEMENTS ? SHORT CIRCUIT TRIP ?× SHORT CIRCUIT TRIP CONFIGURATION A.1.1 DESCRIPTION This appendix illustrates how two CTs may be used to sense three phase currents. The proper configuration for the use of two CTs rather than three to detect phase current is shown. Each of the two CTs acts as a current source. The current that comes out of the CT on phase A flows into the interposing CT on the relay marked A. From there, the current sums with the current that is flowing from the CT on phase C which has just passed through the interposing CT on the relay marked C. This ‘summed’ current flows through the interposing CT marked B and from there, the current splits up to return to its respective source (CT). Polarity is very important since the value of phase B must be the negative equivalent of A + C in order for the sum of all the vectors to equate to zero. Note that there is only one ground connection as shown. If two ground connections are made, a parallel path for current has been created. In the two CT configuration, the currents will sum vectorially at the common point of the two CTs. The diagram illustrates the two possible configurations. If one phase is reading high by a factor of 1.73 on a system that is known to be balanced, simply reverse the polarity of the leads at one of the two phase CTs (taking care that the CTs are still tied to ground at some point). Polarity is important. 808700A1.CDR A B C A B C :5 :5 :5 :COM :COM :COM 808702A1.CDR 1.73 1 1 1 1 60° 60° 60° A-2 469 Motor Management Relay GE Multilin A.1 TWO-PHASE CT CONFIGURATION APPENDIX A A To illustrate the point further, the following diagram shows how the current in phases A and C sum up to create phase ’B’. Once again, if the polarity of one of the phases is out by 180°, the magnitude of the resulting vector on a balanced system will be out by a factor of 1.73. On a three wire supply, this configuration will always work and unbalance will be detected properly. In the event of a single phase, there will always be a large unbalance present at the interposing CTs of the relay.
