Service Information Type KFE and KFVE Electronically ...

1 Reclosers Service Information Type KFE and KFVE Electronically Controlled Vacuum Recloser Installation Instructions KFE10002-E. CONTENTS. Shipment and Acceptance .. 2. Handling and Storage .. 2. Description .. 2. Recloser .. 2. Vacuum Interruption .. 2. Electronic Control .. 3. Ratings and Specifications .. 3. Dimensions and Weights .. 4. Operating Levers and Indicators.. 4. Manual Operating Handle .. 4. Non-Reclosing Lever .. 4. Contact-Position Indicator .. 4. Operations Counter .. 4. Ground-Trip Disabling 5. Closing Solenoid .. 6. Closing Solenoid Operation .. 6. Low Energy Tripper .. 7. Adjustments .. 8. Operations to Lockout .. 8. Number of Fast Operations .. 8. Sequencing 8. Phase-Trip Sequence .. 8. Ground-Trip Sequence .. 8. Reclosing Time .. 9. Reset 9. Electronic Control .. 9 Figure 1. 82049 KMA. Current Sensing ..10 Type KFE recloser combines vacuum interruption with hydraulic counting and Minimum-Trip Selection ..10 electronic fault sensing and trip timing.

2 Time-Current Trip Characteristics ..10 In- Service Recloser Operation ..19 Recloser Accessories ..22. Phase-Trip Timing Cards ..10 Testing ..19 Extra Creepage Bushings ..22. Ground-Trip Timing Test Equipment Required ..20 Bushing Type Multi-Ratio Control Power ..12 Test Procedures Electrical Current Transformers ..22. Installation ..12 Closing ..20 Bushing Current Transformer Preliminary Checks ..12 Operation of Closing Connections ..23. Oil Level ..12 Solenoid ..20 Accessory-Connection Recloser ..12 Phase Minimum-Trip Junction Box ..23. Electronic Control ..12 A Phase ..21 Auxiliary Switch ..24. Vacuum B Phase ..21 Lockout-lndicating Switch ..24. Lifting ..13 C Phase ..21 Remote-Trip ..25. Mounting ..14 Ground Minimum-Trip Remote-Lockout ..25. Direct Mounting ..14 Current ..21 Remote-Close ..25. Pole Mounting ..15 Operating Sequence and Low-Voltage Closing ..26. Substation Elevating Reclosing Time Phase ..21 Control Accessories ..26.

3 Structure ..16 Operating Sequence and Instantaneous Trip ..26. Main Wiring Connections For N. Reclosing Time Ground ..21 Fault-lndicator Target ..27. Installation ..17 Operation of Non-Reclosing Bypass Switches ..17 Lever ..21. Surge Protection ..18 Test Procedures Manual RADIATION. Grounding ..18 Closing ..22 WARNING. High Voltage ..18 Phase Minimum-Trip Current ..22. Placing Recloser in Service ..18 A Phase ..22. Manual Operation of Energized B Phase ..22 Before performing electrical tests on Recloser ..18 C Phase ..22 types KFE and KFVE Reclosers, refer Manual Operation of De-energized Ground Minimum-Trip to Service Information S280-90-1, Recloser ..18 "Vacuum Interrupters Radiation Current ..22 Warning". Non-Reclosing Operation ..19. These instructions do not claim to cover all details or variations in the equipment, procedure, or process described, nor to provide direction for meeting every possible contingency during installation, operation, or maintenance.

4 When additional Information is desired to satisfy a problem not covered sufficiently for the user's purpose, please contact your Cooper Power Systems sales engineer. December 1992 Supersedes 7/86 1. CAUTION Recloser The KFE and KFVE Reclosers employ a The Type KFE Recloser is a self-contained, simple time-proven hydraulic mechanism to Do not energize this equipment out of oil. three-phase current interrupting device. count operations, program the operating KFE reclosers protect systems rated sequence, and determine reclosing time. through kV, KFVE reclosers Solid state electronics provide the accuracy, SHIPMENT through , both are rated at 400 amps reliability, and flexibility for overcurrent sens- AND ACCEPTANCE maximum continuous and 8000 amps sym- ing and trip timing. The electronic circuits metrical interrupting. The KFE and KFVE are housed in a separate cabinet attached Each KFE or KFVE recloser is complete- Reclosers sense both line current and zero- to the recloser tank and connected to the ly assembled, tested, and inspected at sequence ground (earth) current and auto- the factory.

5 It is carefully calibrated, recloser with a six-foot cable. matically interrupts all three phases of the adjusted and filled to the correct level distribution circuit to which it is connected with insulating oil. It is in good condition when any current exceeds the minimum- Vacuum Interruption when accepted by the carrier for ship- trip level. It automatically recloses to restore Arc interruption takes place within the three ment. Service if the fault is temporary. If the fault is sealed vacuum interrupters. Oil is used for 1. Upon receipt, inspect the recloser permanent the recloser locks out after two, electrical insulation, but is not involved in arc thoroughly for damage and loss of three or four preset trip operations. Once interruption. The insulating oil is also used in parts or oil incurred during shipment. locked-out, the recloser must be manually the counting and sequencing mechanism If damage or loss is discovered, file a reset to restore Service .

6 Should the fault and in reclose timing. claim with the carrier immediately. clear before lockout, the recloser will reset automatically for another sequence of oper- The moving contacts in the vacuum inter- 2. Check for oil leakage and tighten all rupters are driven by the release of opening ations. bolts that may have loosened during The recloser can be also set for nonre- springs. A low energy tripper actuated by the shipment, especially the bolts which closing operation (lockout after the first trip electronic circuitry releases the opening attach the head to the tank. operation) with a manually operated exter- spring when line current is sensed above the nal non-reclosing lever. preset minimum-trip level. Closing energy, HANDLING AND STORAGE The trip operations of the recloser can be as well as energy to charge the opening If the recloser is to be stored for some all fast, all delayed, or any combination of spring, is supplied by a high-voltage closing time before installation, provide a clean, fast operations followed by delayed opera- solenoid momentarily connected phase-to- dry storage area.

7 Take precautions dur- tions up to a maximum total of four. Fast phase through a high-voltage contactor. operations clear temporary faults before ing handling and storage to minimize the branch line fuses are damaged. Delayed possibility of mechanical damage; in par- operations allow time for fuses or other ticular, protect the bushings and control downline protective devices to clear to limit equipment. permanent faults to the smallest section of line. DESCRIPTION. A complete Type KFE or KFVE Recloser assembly consists of a KFE or KFVE. recloser and a separate control cabinet connected to the recloser with a 6-foot- long control cable. The control cabinet is designed to be mounted to the recloser tank, however it can be mounted to the pole or other mounting structure at a dis- tance equal to the cable length. The con- trol cable is hard-wired to the recloser and attached to the control with a thread- ed, separable weatherproof connector.

8 83490 KMA. Figure 2. KFE electronic control. 2. KFE10002-E. Electronic Control Table 2 Table 3. The electronic circuits and the plug-in Current Ratings Interrupting Ratings units for programming minimum-trip and Minimum Trip Maximum interrupting Maximum continuous current Current Current trip timing are located in a separate cabi- (amps) .. 400 (amps) (rms symmetrical amps). net mounted to the recloser tank as Overload capability (4 hr) (amps).. 500* Phase Ground (2 hr) (amps).. 600*. shown in Figure 2. No external power Interrupting current (amps) .. 8000 10 5 8000. source or battery is required to operate Magnetizing interrupting current 20 10 8000. the electronics. Power is obtained from (amps) .. 14 30 20 8000. KFE cable charging current at kV 50 30 8000. the line by means of bushing current ( to gnd) (amps) .. 2 70 50 8000. transformers. A minimum of 5 amperes KFE cable charging current at kV 100 70 8000. ( to gnd) (amps) .. 5 140 100 8000.

9 Of primary current flow is sufficient to 200 140 8000. Three-second current power the electronics and charge the trip (rms sym amps) .. 8000 280 200 8000. capacitors which actuate the low energy Momentary currnet (rms sym amps) .. 12800 320 280 8000. Surge current (amps).. 65000 400 320 8000. tripper. In addition, a pickup coil wound 450 400 8000. on one leg of the closing solenoid, pro- *After level-off rated continuous current. 560 8000. vides additional charge to the trip capaci- 800 8000. tors during each reclosing operation to Table 4. insure that the electronic circuits are Operating Times Table 7. Duty Cycle energized at the instant of contact make. Normal reclosing time (sec) .. 2* % of Max Electronic control circuitry is central- Resetting time at 25o C Number of Interrupting Circuit ized on a single printed circuit board (minutes per recloser operation).. Operations Rating X/R Ratio which is easily field-replaceable. Plug-in *A four-second reclosing time is available.

10 KFE KFVE. trip resistors and trip-timing cur ves 96 15 20 3 4. increase application flexibility and are 120 45 55 7 8. easily installed. Instantaneous phase- 32 90 100 14 15. and ground-tripping and fault-indicating 248 Total accessories are available to fur ther Operations enhance the application capabilities of Table 5. Closing Coil Impedance Ratings the control. Nominal Impedance ac Reactance dc ac Voltage Z Resistance X Power Resistance RATINGS AND (kV) (ohms) (ohms) (ohms) Factor (ohms). SPECIFICATIONS The recloser will operate effectively only when applied within its specified ratings. Consult the following ratings tables and compare to system characteristics at point of application prior to installation. Table 1 Voltage Ratings KFE KFVE Nominal operating (kV) .. 125 (Vdc) - - - - Maximum design (kV).. 250 (Vdc) - - - - Impulse withstand (BIL)* x 50. microsecond wave, Table 6. crest (kV) .. 110 125 Mechanical Specifications 60-Hz withstand (rms).