ML20099C888
| ML20099C888 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 02/22/1985 |
| From: | Gelazis V, Tornberg E CYBEREX, INC. |
| To: | |
| Shared Package | |
| ML20099C858 | List: |
| References | |
| T-10656, T-10656-R, T-10656-R00, NUDOCS 8503110455 | |
| Download: ML20099C888 (32) | |
Text
{{#Wiki_filter:. l t TEST REPORT FOR A 20 KVA UPS SYSTEM POWER CIRCUIT ISOLATION TEST PREPARED FOR BECHTEL POWER CORPORATION SAN FRANCISCO, CALIFORNIA FOR PUBLIC SERVICE ELECTRIC & GAS COMPANY HOPE CREEK. GENERATING STATION HANC0CKS BRIDGE, NEW JERSEY NUCLEAR SAFETY RELATED PREPARED BY CYBEREX INCORPORATED 7171 INDUSTRIAL PARK BOULEVARD MENTOR, OHIO 44060 4 j TEST REPORT NO. T-10656 REVISION 0 - FEBRUARY 1985 i J O m 2iM Mik -- E
TABLE OF CONTENTS SECTION TITLE PAGE NUMBER CERTIFICATION 1 -1 INTRODUCTION / CRITERIA 2 II TEST PROGRAM 3 A. TEST SETUP 3 B. INSTRUMENTATION 3 C. CALIBRATION AND SCALES 4-5 III TEST RESULTS AND DISCUSSION 6 A. GROUND FAULT TESTS 8-9 1 THRU 4 AND 6 THRU 21 B. TEST NO. 5 6 C. INVERTER /UPS OUTPUT TO NEUTRAL 10-11 FAULT TEST 22 THRU 34 D. ANOMALIES 7 O IV CONCLUSIONS 13 V ATTACHMENTS 1. Cyberex Test Procedure No. TP0086 14 2. Oneline Diagram 20 KVA UPS D9743-001 15 3. Recorder Charts Test I through 34 16 Total No. of Charts 45
REFERENCES:
1. IEEE STD. 384-1981 2. Nuclear Regulatory Guide 1.75 3. Nuclear Regulatory Safety Evaluation Report - NUREG 1048 Section 8.3.3.3.4 O
i l CERTIFICATION FOR POWER CIRCUIT ISOLATION TEST REPORT This is to certify that Cyberex, Inc. has reviewed the contents of this report, and it is true and correct for the Power Circuit Isolation Testing performed on a Class IE 20 KVA UPS System Tag Number
- OBD595, Bechtel Power Corporation's Specification Number 10855-E-154(Q).
This report meets the intent of Cyberex, Inc. test plan TP0086 and IEEE Standard 384-1981 Section 7.1.2 and Section 7.1.2.3. NUCLEAR SAFETY RELATED O Cyberex, Inc. Prepared By: k! 7 [2L[ff VALDAS GEL %ZIS DATE p o ed By: WL z/2-r/W / EDWARD W. TORNLElW DATE . O l l f -r
s a a 4 / l I i i l I i l l ) i i SECTION I O I s l 4.
SECTION I A.' INTRODUCTION An Uninterruptible Power Supply (UPS), Hope Creek TAG #0BD595 S/N 9743-23 (20. KVA) was subjected to an UPS/ Inverter Isolation Test program as described in Cyberex test procedure TP0086. Testing was performed on January 10 thru 14 of 1985. The test specimen is of identical rating, material, configuration and construction to all of the Hope Creek's Class 1E UPS Systems. The intent of the program is to show that the UPS/ Inverter is a power circuit isolation device between Class 1E power input sources and Non-Class 1E load circuits, as defined by IEEE Std. 384-1981 Sections 7.1.2, 7.1.2.3 and NRC Reg. Guide 1.75. The Test Program was designed to measure the effects on the inputs j to the UPS when its output is shorted or grounded. On Hope Creek, application of certain UPS systems is such that the UPS input is supplied from Class 1E power sources while the UPS output supplies non-class 1E loads. Therefore - a shorted _ or grounded UPS i output fault condition during which the UPS system must function as both a power circuit isolation device and as an input current limiter to limit the effects of the faults on the Class 1E power sources to acceptable values. O Tae UeS sustem was subsected to five fauit conditions. The 200% overload test requested by the customer cannot be performed due to design limitations of the inverter. The inverter, due to its current limit
- feature, will not support a
200% overload. Application of 200% overload, or any load above the inverter's current limit setting, will cause the Static Switch to transfer the load (overload) to the back-up AC source. The transfer to back-up source will be annunciated by the UPS. Overload caused by the short on UPS load side will be reduced in approximately 1.5 seconds by l 150A fuse F301 in regulator circuit of the back-up source. B. ACCEPTANCE CRITERIA Testing is to demonstrate that the a'pplication of - faults at the j inverter output and at the load side of UPS does not exceed the input current and voltage of the " alternate" DC - and " Normal" AC-1 supply as shown below: SOURCE VARIATION " Alternate" DC Supply 105-140V.DC 0-364A DC i ~ " Normal" AC Supply 480 t 10%V (L-L) 3 Phase 55A 0-132A Peak for 10 msec " Bask-Up" AC'. Supply 80V 101V 1 Phase 0-78A-0-500A Peak-for 10 msec i 1
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l SECTION II t
- O TEST PROGRAM A.
TEST SETUP: } The test specimen (UPS) consists of three cabinets and was interconnected as shown by Cyberex drawing D-9743-001. External connections to the UPS were: Normal Source - 480V, 60Hz, 3 Phase Back-Up Source - 480V, 60Hz,1 Phase Alternate DC Source - 125V nominal battery i (rated 80KW for 30 minutes) Ground -' Building Ground r Inverter Output - To' Fault Breaker UPS Output - To 20 KVA,.8pf load and to fault breaker 4 Normal and backup power was supplied by a single 1000 KVA j. distribution transformer. Backup source power was provided from Phase A - B of the transformer. The required faults were applied by closing the " Fault" breaker with the appropriate jumper installed on the load side () terminal s. An opto-coupler energized by inverter or UPS output voltage was also connected to the load terminals of the " Fault" breaker to generate.the " Trigger" pulse to the -recorders. a B. INSTRUMENTATION: The data recording was done by two Gould Model 2800W eight l channel chart recorders which were triggered simultaneously by closing the " Fault". breaker. The recorders were set up so that ~ pre-trigger data (retained for reference) represented 25% of the total record. Each record is the result of 8192 samples / channel' taken at 10 microsecond intervals, resulting in a record 81.92 milliseconds long in time. The data is.then plotted from memory to a chart 204.8cm long with the trigger point (event initiation) 51.2cm-from the start. The waveform time base on this chart is 400 microseconds /cm or 40 microseconds /mm (which is the smallest. chart division.) The trigger is recorded by an event pen located between channels 7 &' 8. The event pen between ^ channels 1 & 2 recorded pulses 2 milliseconds apart generated by an internal clock as a check of recorders speed control. t!O a -g r ,,,-w- ,e -, +.,
Signal conditioners were used to isolate the recording system 'from the power sources and to convert the measured values to voltage within the recorders input capabili ty. The signal O conditioners used.were: Potential Transformer - 4:1 ratio Current Transformers - 1000:1 ratio with 10 Ohm burden i resistors (clamp on type) Hall effect DC Current Sensor - 3000 Amp /10 volts Isolation Amplifier - Two channel with selectable ratios from 5:1 to 5000:1 Coaxial Shunt - 508 micro ohm, used during retest in place of AC current transformer, isolated through Channel 2 of the isolation amplifier. C. CALIBRATION AND SCALES The recorders, isolation amplifier, current and potential transformers and the hall effect sensors were factory calibrated instruments received from their manufacturers and their operations were verified for proper function. The coaxial shunt resistance was checked on a Kelvin double bridge which was in calibration. The isolation amplifier ratios were determined by the two voltmeter method (the voltmet?rs were 4 in calibration) and resulted in the following values: O RANGE INPUT OUTPUT TRANSFER FUNCTION Channel #2 50mV/DIV 55.5mV 10mV 5.55mV/mV Channel #2100mV/DIV 108.5mV 10mV 10.85mV/mV Channel #2.2V/DIV 220mV 10mV 22.0mV/mV Channel #2.5V/DIV 545.4mV 10mV 54.54mV/mV Channel #150V/DIV 61 Volts 10mV 6100mV/mV 4 The other signal conditioner transfer functions are: Potential transformer (4:1) 4 volts / volt Current transformer with 10 Ohm burden - 100 Amps / volt Hall Effect Sensor .300 Amps / volt T & M Shunt-1969 Amps / volt O r
The recorder scales were calculated as follows: The recorder chart channel width is Scm. The recorder range settings are indicated at full
- scale, O
therefore the chart scale is the product of recorder range /Scm and the signal conditioner transfer function. For Example: Potential Transformers (4:1) 4 Volts / Volt x 500 Volt /5 cm = 400 Volts /cm 4 or 4 Volts / Volt x 100 Volts /5 cm = 80 Volts /cm Alternate Voltage was measured by the isolation amplifier on 50V/DIV. range and recorder set on 10mV/cm range (.05VFS). The calibration was adjusted until recorder deflection at 50 Volt /cm was equal to a voltmeter reading of the battery voltage. Before performing the " repeat" test the isolation amplifier's transfer ratio was measured and the chart scale was changed to 61 Volts /cm with the recorder of nominal calibration. NOTE: Scales for all channels have been shown on recorder l charts in Attachment No. 3. i (::) I (::>
l O 1 I l I i SECTION Ill i O 1 l 1 i I 1 O l
= SECTION III TEST RESULTS AND DISCUSSIONS i A. GROUND FAULT TESTS
- O' The ground fault test configurations are listed in Table 1, Fig.
2_(Sh.10) of the test procedure, it describes the tested fault conditions. An - operating UPS will charge the stray capacitances to the grounded enclosures. The ground fault tests simply discharged this stored charge. During Tests 1 through 21 there was no disturbance on any of the input sources: ALTERNATE, NORMAL or BACK-UP when each of the fault types were applied. I Channel 78 of the charts indicates the ground fault current sensed by CT7. The fault current was indicated as one or more 4 narrow spikes less.than 2 amperes with corresponding narrow dip 4 in the UPS and/or inverter output voltage waveform. During the ground fault tests the two events occurred which are J described under Anomalies in Section III (Chcnnel SA memory and misplaced cliplead in Test #14.) 4 4 All ground fault tests were successful in accordance with the test acceptance criteria. Refer to Test #1 thru #4 and #6 thru #21 Charts in Attachment 3. O a T se " es Test #5 was intended to show the tranfer from NORMAL source to ALTERNATE source without any fault appl ied. This test was performed by manually' opening CB201 (NORMAL - source input j breaker) to simulate loss of Normal AC voltage. This test has no bearing on the isolation test. C. INVERTER /UPS OUTPUT TO NEUTRAL FAULT TEST This series of tests simulated a direct short -(phase to neutral) on the inverter and UPS outputs. lia UPS reacts to an output i fault by transferring the load (fault) to the back-up (480V AC, i i single phase) source if it is available. When ' the back-up source is not available the inverter goes into the current limit mode and the al ternate (125V DC) source is only supplying inverter no load current (20-25 Amps) continuously as a result of inverter's DC filter circuit. In all cases the alternate (DC) and normal (480V AC) supplies did not exceed the acceptance -criteria values. i. O 6 t
The currrnt transformers used to m:nitor faul t currents prematurely saturated and do not indicate the actual magnitude of the fault current. Most tests were repeated using a coaxial shunt to record the fault currents. Due to the short time frame of the charts, the final resolution of continuous faults on the back-up source were not shown. Typically these faults persisted for 1.5 seconds until F301 fuse in the AC regulator melted out reducing the fault current to about 100 amps RMS. Refer to Charts for Tests #22 through #34 in Attachment 3. D. ANOMALIES: 1. Recorder Channel SA memory developed a bad spot seen on the charts as a narrow spike to full scale. Therefore the " NORMAL" source phase C to A voltage was moved from Channel SA to a spare channel 8B during Test No. 7 through 34. 2. During Test 14, when changing trigger circuit leads at the " Faul t" breaker, a cliplead was left connecting the inverter output to UPS output on the load side of " Fault" breaker. When the " Faul t" breaker was closed this cliplead drew current derived from the instantaneous voltage differences between the inverter and UPS output (supplied by back-up source) until it mel ted. Since there was no adverse impact on the input sources Test 14 was not repeated. 3. Tests 22 through 34, with the exception of 25 & 31, were repeated with a coaxial shunt replacing back-up input current transformer (CT4) since the fault currents saturated CT4. The shunt used was T&M Co. Model F10007-40. Channel f2 of the isolation amplifier was used to isolate the shunt output from the recording system. Channel 2B was used to record the shunt / isolation amplifier output. 4. When ground fault tests were finished, the ground current transformer CT7 was left connected to Channel 78 and was reacting to (measuring) the magnetic fields generated by fault currents in nearby conductors. i 7_
i TABLE 1 CHART LIST, GROUND FAULT TESTS MANUAL TEST BYPASS SW. AVAILABLE FAULT NO. POSITION SOURCES TYPE COMMENTS
- 1 NORMAL ALL INVERTER OUTPUT TO GROUND 2
BYP-PREF ALL INVERTER OUTPUT TO GROUND 3 BYP-ALT ALL INVERTER OUTPUT TO GROUND 4 BYP-PREF NORMAL INVERTER OUTPUT ISOLATE ALTERNATE TO GROUND i 6 NORMAL ALTERNATE INVERTER OUTPUT
- CHANGED CHANNEL BACK-UP TO GROUND 5A TO 88 (SEE ANOMALY N0. 1) 7 NORMAL NORMAL INVERTER OUTPUT BAC K-UP TO GROUND 8
NORMAL ALL UPS OUTPUT TO O caouao 9 BYP-PREF ALL UPS OUTPUT TO GROUND 10 BYP-ALT ALL UPS OUTPUT TO GROUND 11 BYP-ALT NORMAL UPS OUTPUT TO ISOLATE ALTERNATE GROUND 12 NORMAL ALTERNATE UPS OUTPUT TO BACK-UP GROUND 13 NORMAL NORMAL UPS OUTPUT TO BACK-UP GROUND 14 BYP-ALT BACK-UP UPS OUTPUT TO
- MISPLACED ISOLATE GROUND CLIPLEAD (SEE)
ANOMALY N0. 2) 15 NORMAL ALL NEUTRAL TO GROUND 16 BYP-PREF ALL' NEUTRAL TO GROUND -
TEST MANUAL BYPASS AVAILABLE NO. SWITCH POSITION SOURCES FAULT TYPE COMMENTS * ' O' 17 BYP-ALT ALL NEUTRAL TO caouao 18 BYP-PREF NORMAL NEUTRAL TO ISOLATE ALTERNATE GROUND 19 NORMAL ALTERNATE NEUTRAL TO BACK-UP GROUND 20 NORMAL NORMAL NEUTRAL TO BACK-UP GROUND 21 BYP-ALT BACK-UP NEUTRAL TO ISOLATE GROUND
- No deviation was observed on voltage and current waveforms of Alternate DC, Normal AC and Back-up AC source.
O O TABLE 2 CHART LIST, NEUTRAL FAULT TESTS l TEST MANUAL BYPASS SOURCES FAULT NUMBER. SWITCH POSITION AVAILABLE TYPE COMMENTS ** 22 NORMAL ALL INVERTER FUSE F151 OUTPUT TO CLEARED (OPEN)** NEUTRAL 22 REPEAT 1 NORMAL ALL INVERTER FUSE F151 OUTPUT TO CLEARED ** NEUTRAL 23 BYP-PREF ALL INVERTER OUTPUT TO NEUTRAL 23 REPEAT 1 BYP-PREF ALL INVERTER FUSE F151 OUTPUT TO CLEARED ** NEUTRAL 24 BYP-ALT ALL INVERTER OUTPUT TO NEUTRAL 24 REPEAT 1 BYP-ALT ALL INVERTER OUTPUT TO .O NEUTRAL 25 BYP-PREF NORMAL INVERTER ISOLATE ALTERNATE OUTPUT TO NEUTRAL 26 NORMAL ALTERNATE INVERTER FUSE F151 BACK-UP OUTPUT TO CLEARED ** l NEUTRAL 26 REPEAT 1 NORMAL BACK-UP INVERTER SHOOT ** OUTPUT TO THROUGH NEUTRAL CURRENT 27 NORMAL NORMAL INVERTER F151 CLEARED ** BACK-UP-OUTPUT TO NEUTRAL 27 REPEAT 1 NORMAL NORMAL INVERTER BACK-UP OUTPUT TO NEUTRAL 28 NORMAL ALL UPS OUTPUT F301 CLEARED TO NEUTRAL AFTER CHART ENDS ** 28 REPEAT 1 NORMAL ALL UPS OUTPUT F301 CLEARED TO NEUTRAL AFTER CHART ENDS **.
TEST MANUAL BYPASS SOURCES FAULT NUMBER SWITCH POSITION AVAILABLE TYPE COMMENTS ** O 29 BYP-PREF ALL UPS OUTPUT TO NEUTRAL 29 REPEAT 1 BYP-PREF ALL UPS OUTPUT SHOOT THROUGH TO NEUTRAL CURRENT ** 30 BYP-ALT ALL UPS OUTPUT F301 CLEARED TO NEUTRAL AFTER CHART ENDS ** 30 REPEAT 1 BYP-ALT ALL UPS OUTPUT F301 CLEARED TO NEUTRAL AFTER CHART ENDS ** 31 BYP-PREF NORMAL UPS OUTPUT ALTERNATE TO NEUTRAL i 32 NORMAL ALTERNATE UPS OUTPUT F101 & F301 BACK-UP TO NEUTRAL OPENED AFTER CHART ENDS ** 4 32 REPEAT 1 NORMAL ALTERNATE UPS OUTPUT F301 OPENED I BACK-UP TO NEUTRAL AFTER CHART ENDS ** 33 NORMAL NORMAL UPS OUTPUT F301 CLEARED BACK-UP TO NEUTRAL AFTER CHART ENDS ** 33 REPEAT 1 NORMAL NORMAL UPS OUTPUT F301 CLEARED BACK-UP TO NEUTRAL AFTER CHART ENDS ** 34 BYP-ALT BACK-UP UPS OUTPUT F301 CLEARED TO NEUTRAL AFTER CHART ENDS ** 34 REPEAT 1 BYP-ALT BACK-UP UPS OUTPUT F301 CLEARED ISOLATE TO NEUTRAL AFTER CHART ENDS **
- No deviation was observed on voltage and current waveforms of Alternate DC 1
or Normal AC source. Discussion of events on Test Charts 22-34 follows: (::)
.~ l Test 22 Illustrates the typical events resulting from a fault on on the inverter output. 1. Inverter goes into current limit. 2. Static Switch transfers to back-up. The inverter is still connected to the load. 3. Back-up source clears F151 (870 Amp peak) and recovers to supply the load with only a short interruption. Test 23 and Differ due to the phase angle of fault application. The 23 Repeat 1 Static Switch is still energized and active in the BYP position and the static switch output is disconnected from the load. During Test 23 Repeat 1 the static switch initiated a transfer to back-up source with the resulting shoot through clearing F151 (1000 Amp peak). Test 24 and 25 Illustrates inverter current li: nit. The inverter is not connected to the UPS load. Back-up ' source is supplying the load. Test 26 and 27 Are similar to Test 23 and 23 Repeat 1. The two possibilities are illustrated. + Test 28 Illustrates a fast transfer to back-up source without Repeat 1 inverter going into current limit and fault current supplied from back-up source.-(675 Amp RMS measured at 480V incoming side) SEE NOTE #1 Test 29 Illustrates a current of 1500 Amp ~ peak (at 480V) supplied j Repeat 1 by back-up source. SEE NOTE #1 i Test 30 Illustrates the fault current supplied by back-up source. Repeat 1 (750 Amps RMS) SEE NOTE #1 Test 31 Illustrates a delayed inverter current limit. The inverter attempted to supply the fault but did not exceed the 4 acceptance criteria during the delay. l Test 32 Illustrates a fault occuring near voltage zero crossing causing a delay in inverter current limit initiation..
- i Test 33 Illustrates a quick transfer, fault occurred at voltage maximum.
Test 33 Illustrates a minimum disturbance to the inverter transfer. Repeat 1 The fault occurred near voltage zero crossing. Test 34 Illustrates the maximum continuous fault current requirement l Repeat.1 from back-up source (700 Amp RMS). SEE NOTE #1 NOTES: #1 In these cases the current exceeds the acceptance current level j for the back-up source. However, the Hope Creek Class 1E motor i control center circuit breaker (thermal magnetic - 90 Amps) will i clear any fault in excess of 600 amperes within 0.02 seconds. _
t l r. SECTION IV O S O
SECTION IV CONCLUSIONS The input sources (Alternate DC, Normal AC, and Back-up AC) were not affected by connecting an output line to ground. There was no disturbance indicated on any input source waveform, at or after the ground fault application in all UPS configurations. The Alternate DC and Normal Ac sources were not adversely affected by applying line to neutral faults to either the Inverter or UPS outputs. Output faults reduce power requirements from these sources due to Inverter's current limit action mode which is supplied by the Inverter's input filter capacitor bank which acts as a low pass filter. The back-up source is required to supply the fault current, which is limited in i magnitude and duration -by the line voltage regulator's series impedance and overcurrent protective devices. The maximum faul t current requirement from the "B AC K-UP" is substantially sinusoidal 60 HZ current for approximately 1.5 seconds until F301 melts out, but the Hope Creek MCC circuit breaker will clear the fault in less than 1.5 seconds. O 1 !O a
f d L ~,A.%.O 2" tn'6 ee ^' i ^ ' ~ " ~ ~ ~ ~' "A"-, O 1 l f l I SECTION V O l I i O t l l
--,s. l .i ATTACHMENT 1 r CYBEREX TEST PROCEDURE NO. TP-0086 0 1 I t O i, t l
.i (. 1 l LO l TEST PROCEDURE .UPS INVERTER ISOLATION TEST ( 4 i l i i i i FOR: PUBLIC SERVICE ELECTRIC & GAS CO. HOPE CREEK GENERATING STATION i BECHTEL POWER CORPORATION P.O. 108SS-E-154(Q)-AC l I l + i I-i I 1 j BY: CYBEREX,- INC. 1 7171 INDUSTRIAL PARK BLVD. j MENTOR, OHIO 44060 I l 1
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4 i INDEX 1 i SECTION PAGE i j 1. OBJECTIVE 2 2. PASS CRITERIA 2 t 3. INPUT POWER SOURCES 3 3 j 4. FAULT LOCATION AND TYPE 4 i 5. TEST FACILITY AND EQUIPMENT 5 i [ 6. TEST PROCEDURE 6 THRU 8 i I 1 cO r i t 4 1 il l Q~ i i l l....
- .~.
1. OBJECTIVE: To establish, by test, that the inverter of the UPS system, employed at Hope Creek Generating Station, is a power circuit isolation device. 2. PASS CRITERIA: Definition of. Isolation Device: a device is considered to be a power circuit isolation device if it is applied such that the maximum credible voltage or current transient applied to the non-class IE side of the device will not degrade below an acceptable level, the operation of the circuit on the other side of that device. In this case, a faul t on non-IE side of the UPS (load side) will not degrade or affect the Class-IE (input side) of the inverter. i 4 lO 1 f i i i I I i i 1 1 ry._,. m y
i i 3.0 INPUT POWER SOURCES: 4 I SOURCE NORMAL VARIATION i 1 4 " Alternate" DC Supply 105-140 VDC 0-364 ADC " Normal" AC Supply 480 +10% V (L-L) 3 phase 0-55A 0-132AP for 10 msec " Backup" AC Supply 480 +10%V j 1 phase. 0-78A 1 0-500AP for 10 msec h
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s 4. FAULT LOCATION AND TYPE () Faults will be applied to inverter AC output and loadside output terminal by closing a switch as required. FAULT TYPES: 1. Inverter Output (Hot) to Ground 2. UPS Loadside Output (Hot) to Ground 3. Neutral to Ground 4. Inverter Dutput (Hot) to Neutral 5. UPS Load side Output (Hot) to Neutral 4 Figure 2 shows the circuit configuration for the above five faul ts. i O ? O ( 4- ,,-m,-, -s ..n-,- c e .m.- ~ - 4
5.0 TEST FACILITY AND EQUIPMENT A. DC SUPPLY - C&D 4LCW-15 Battery (60 cells, 80KW for 30 min.) with 400 Amp charger. B. AC SUPPLY - 483V, 3 Phase, 4W, 60 Hz,1200A, grounded neutral. C. AC LOAD BANK 30KW or 0-30 KVA 9 0.8PF. D. FAULT APPLICATION DEVICE - GE Circuit Breaker TKMA2Y1200 1200A, 3 Pole. 5.1 TEST INSTRUMENTATION A. Gould Inc., model 2800W high frequency recording system. Eight channel, independent scale select +.05 to +500 volts full scale. Two units are required for monitoring the various test. The two units designated are A & B. B. Potential transformer 480V, 60HZ primary 120V secondary (4:1 ratto) Six units required-designated PT1-6. C. Current transformer 1000:1 ratio with 10 0HM burden resistor (.01 V/A). Seven units required-designated CT1-7. ) D. Wideband DC Isolation Amplifier, TEK Model A6902A-Designated VT. E. DC Current Sensor 3000AFS Model 1A-5024P, F.W. Bell Inc., - Designated IT. (_/ l..
e 1 6.0 TEST PROCEDURE 6.1 GENERAL NOTES A. Determine and record all signal conditioner transfer ratio (multiplier) values before starting test. B. Verify the following before starting up the unit: System connections per Fig 1 & 2. Static switch in preferred position. " Test" switch centered. " Return Mode" switch in " auto" position. " Sync" switch - on. All " isolate" toggle switches - on. . Auctioneer bypass switch in " Normal" position. Manual bypass switch in " Normal position (will change as specified in each test). See Table 1 All power sources ene'rgized (will change a specifled in each test). See Table 1 Adjust output load to 20 KVA 9 0.8PF (133.3A resistive and 100A inductive).* C. The recorder system (connection per Fig 2) set up is as follows: All channels in " storage" mode Trigger on " external analog" and DC coupled Pretrigger delay at 25% Trigger Mode to " manual" Memory size to 8K Bytes / Channel Center all recorder pens Set range switches to achieve desired scales, j External-trigger will be generated -by closing " fault" i circuit breaker through OPT 0 coupler dircuit to both recorders simultaneously, i t D. The recorder time base that controls the recording length and time ~ resolution will be initially set at 10KHZ for high resolution recording at the fault application. The resulting record will consist 20.4 MSEC of data before the fault application and -61.4 msec after for a total diplay of 81.,8 msec or 4.9 cycles of-60 Hz power frequency. The record will consist of ~8192 samples 400 microseconds apart. ~
- Run the unit for at'least 30 minutes before applying load.
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.=. { 6.2 FAULT TEST Pi EDURES A. Select recoding time base, enter test i B.- Arm both recorders, wait until memory is full N C. With required " fault" jumper installed connect the trigger lead to the unused " fault" CB output terminal. D. Close " fault" breaker, wait for " recording" lights to go out then open " fault" breaker. E. Wait for data to be plotted. F. Repeat above for all the test modes. 6.3 " TEST MODES" Table 1 shows the actual test numbers. 6 '. 3.1 A. All source breakers closed B. Manual bypass switch in " Normal" position l C. Install jumpers as shown on Fig. 2 to the following faults: 1. Inverter Hot-Ground 2. UPS load side Hot-Ground 4 3. Neutral-Ground
- 4.. Inverter Hot-Neutral-l S.
UPS load side Hot-Neutral 6.3.2 A. All source breakers closed B. Manual bypass switch in " Bypass Pref" position i C. See 6.3.1.C 1 thru 5 6.3.3 A. All source breakers closed B. Manual' bypass switch in " Bypass Alt" position C. See 6.3.1.C 1 thru 5 6.4.1 A. Back-up source breaker open B. Manual Bypass switch in " Bypass Pref Iso" position C. See 6.3.1.C 1 thru 5 6.5.1 A. All source breakers closed B. Manual bypass switch in " Normal" position C. _ Trip the normal source breaker to observe the impact i j on the alternate source (DC battery). 6.6.1 A. Normal source breaker open Back-up and alternate source breakers closed 3 l B. Manual bypass switch in " Normal" position C. See 6.3.1.C 1 thru 5 i 6.7.1 A. Alternate source breaker open (battery in maintenance) Back-up and normal source breakers closed. B. ' Manual bypass switch in " Normal" position C. See 6.3.1.C 1 thru 5 i l. 6.8.1 A. Back-up source breaker closed, normal and alternate j source breakers open. I S. Manual bypass' switch :in _"Byp. Alt. Isolate" position i C. See 6.3.1.C 2i 3, & 5 _ - =
Ui INVERTER ISOLATION E TABLE - 1 FAULT TYPE PER SEC. 4.0 MANUAL TEST SOURCE BYPASS INVERTER MODE 8REAKERS SWITCH TO U PS-NEUTRAL-INVERTER-U PS - SECTION POSITION POSITION GROUND GRD. GROUND NEUTRAL NEUTRAL 6.3.1 AL BR AKERS NORMAL 6.3.2 AL M KERS BYP PREF 6.3.3 AL B AKERS BYP ALT "cs;;; " un' O S h.1 1 RIP NORMAL NORMA CHECK TRANSFER 6.6.1 NORMAL BREAKER NORMAL OPEN. BACK-UP AND ALTERNATE BREAKER CLOSED " ""^' as 8:#iN MAINTENANCE) 8.U. & NORMAL BREAKER CLOSED 6.8.1 BACK-UP BREAKER BYP ALT ~ CLOSED. NORMAL ISOLATE AND ALT. BKRS. OPEN l O NOTE: NUMBERS !N CIRCLES INDICATE THE ACTUAL TEST NUMBERS l
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a% ATTACHMENT 2 0 ONE LINE DIAGRAM 20 KVA UPS DWG. NO. D-9743-001 F i l l O, _ _
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f ATTACHMENT 3 O i I RECORDER CHARTS 4 l TEST 1 THRU 34 I l TOTAL NO. 45 i O 4 i I e i O
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