Siemens 38-3AH3-GTD User Manual Download

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Instruction manual

Type 38-3AH3-GTD (B, D, E and F) 38 kV
electrically operated ground and test device

Installation operation maintenance E50001-F710-A243-V2-4A00

usa.siemens.com/mvswitchgear

Summary of Contents for 38-3AH3-GTD

Page 1: ...Instruction manual Type 38 3AH3 GTD B D E and F 38 kV electrically operated ground and test device Installation operation maintenance E50001 F710 A243 V2 4A00 usa siemens com mvswitchgear ...

Page 2: ...ith the installation construction or operation of the equipment and the hazards involved In addition this person has the following qualifications l Is trained and authorized to de energize clear ground and tag circuits and equipment in accordance with established safety procedures l Is trained in the proper care and use of protective equipment such as rubber gloves hard hat safety glasses or face ...

Page 3: ... the local sales office The contents of this instruction manual shall not become part of or modify any prior or existing agreement commitment or relationship The sales contract contains the entire obligation of Siemens Industry Inc The warranty contained in the contract between the parties is the sole warranty of Siemens Industry Inc Any statements contained herein do not create new warranties or ...

Page 4: ...Arc flash hazard and hazardous voltages Will cause death serious injury or property damage Always de energize and ground the equipment before maintenance Read and understand this instruction manual before using equipment Maintenance should be performed only by qualified personnel The use of unauthorized parts in the repair of the equipment or tampering by unqualified personnel will result in dange...

Page 5: ... de energize a circuit breaker or ground and test device and remove it from the switchgear before performing any tests maintenance or repair 2 Always perform maintenance on the circuit breaker or ground and test device after the spring charged mechanisms are discharged except for test of the charging mechanisms Check to be certain that the indicator flags read OPEN and DISCHARGED 3 Always let an i...

Page 6: ...rounding function of the type 38 3AH3 GTD ground and test device Control circuits are made through a remote open close pushbutton station and control cable that is connected to the ground and test device by use of a plug and receptacle mounted on the ground and test device front panel The grounding operation is enabled by selecting the close function on the selector switch mounted on the front pan...

Page 7: ... manual l Types B and E Device for grounding lower studs A ground and test device arranged to allow the lower primary studs to be connected to ground has conductive copper primary extensions in the lower primary stud disconnect position These devices are available in two types l Type B Provided with both lower conductive and upper dummy studs and with both lower and upper test ports The upper test...

Page 8: ...bes can be secured in place by positioning the sliding test port to a third position which engages the test probe This feature also verifies that the probes are fully inserted Test probes are provided which must be fitted with test cables by the user The choice of cable must be carefully reviewed by the user to ensure that it is adequate for the intended purpose Cables required for use with test p...

Page 9: ... end into the bayonet opening to a depth beyond the two set screws 4 Securely tighten the two set screws to firmly retain the cable in the bayonet 5 Pull the cable and seat the bayonet in the tube 6 Reinstall the outer retaining ring and seat the outer retaining ring in the groove in the tube refer to Figure 1 Cable installation in test probes item 4b on page 10 Frame interlocks Frame interlocks a...

Page 10: ...tion in test probes Item Description 1 Space for user s cable not shown 2 Clear tube 3 Bayonet contact 4 Retaining ring 4a inner 4b outer 5 Set screws to secure cable 6 Groove engaged by sliding test port slide 4a 3 6 5 1 5 4b 2 ...

Page 11: ...ure 2 Frame interlock and closed device interlock location shown circled SAFETY INSTRUCTIONS DANGER WARNING CAUTION Selector switch USE FOR GROUNDING LOWER STUDS ONLY Key transfer interlock ELEMENTARY DIAGRAM ...

Page 12: ...t bypass or defeat interlocks Do not disassemble interlocks to make them inoperative Check interlock function prior to inserting ground and test device into switchgear unit Read this instruction manual before using ground and test device Know and understand correct interlock function Item Description 1 Masking plate closed device interlock 2 Frame size interlock 3 Circuit breaker operating mechani...

Page 13: ... channel not accessible with device in CONNECT position 2 Upper test ports and test port slide 3 Test port key interlock 4 Test port 5 Remote control cable receptacle 6 Selector switch and key interlock with padlock provision 7 Spring condition indicator 8 Contact condition indicator 9 Padlock provision 10 Frame interlocks and closed device interlock 11 Lower test ports and test port slide 1 2 9 3...

Page 14: ...d and test device type B for grounding lower studs side view Item Description 1 Upper test ports 2 Upper test well 3 Lower test ports 4 Lower test well 5 Vacuum interrupter 6 Upper dummy primary 7 Lower conductive primary 4 1 2 6 7 5 3 ...

Page 15: ...nterlock inside channel not accessible with device in CONNECT position 2 Upper test ports and test port slide 3 Test port key interlock 4 Test port 5 Remote control cable receptacle 6 Selector switch and key interlock with padlock provision 7 Spring condition indicator 8 Contact condition indicator 9 Padlock provision 10 Frame interlocks and closed device interlock 11 Lower test ports and test por...

Page 16: ...d and test device type D for grounding upper studs side view Item Description 1 Upper test ports 2 Upper test well 3 Lower test ports 4 Lower test well 5 Vacuum interrupter 6 Upper dummy primary 7 Lower conductive primary 4 1 2 6 7 5 3 ...

Page 17: ... type B Lower stud test port Ground Grounding switch Lower stud conductive Verify connections of upper studs and lower studs in the switchgear circuit breaker compartment Device type B is designed to ground lower studs and device type D is designed to ground upper studs Confirm that the device selected will ground the desired studs in the switchgear compartment Figure 9 Elementary diagram for devi...

Page 18: ... the circuit breaker cell the key transfer interlock becomes accessible to receive the key from the closed and locked test port key interlock Upon inserting this key and rotating the second key in the key transfer interlock becomes available This second key functions in the selector switch to allow selection of the electrical closing grounding or opening functions Selector switch Off position l Co...

Page 19: ...Extend the control cable to its full length Use the CLOSE OPEN pushbutton control station as far from the switch gear compartment to be grounded as possible and off to the side rather than in the front Make sure that no person is in the area in front of the switchgear compartment to be grounded Hazardous voltage and high currents Can cause death serious injury and property damage Read and understa...

Page 20: ...nged to ground lower studs type B on page 17 or Figure 9 Elementary diagram for device arranged to ground upper studs type D on page 17 for device arranged to ground the upper studs will aid understanding A1 2 The following should be available A1 2 1 Ground and test device appropriate to the studs upper or lower which are to be grounded A1 2 2 Remote close trip pushbutton control station consistin...

Page 21: ...transfer interlock and in the test port key interlock refer to step A1 3 A1 5 2 Insert the key in the key transfer interlock but do not turn it Try to remove the second key in the key transfer interlock It should not be removable Rotate the first key and try to remove the second key The second key should be removable and must fit and work only in the interlock associated with the selector switch W...

Page 22: ...it switches LS21 and LS22 open to de energize the motor Limit switch LS9 closes energizing the spring release solenoid 52SRC l The ground and test device then automatically closes opening the 52b contacts driven by the major bell crank of the device The 52b contact 41 42 opens the spring release coil circuit and 52b contact 51 52 opens the anti pump relay 52Y spring release coil and motor circuits...

Page 23: ...ion line to line and line to ground measurements A2 1 1 Complete operational checkout of the ground and test device and familiarization routine detailed in section A1 of the operation device types B and D instructions A2 1 2 Verify that the ground and test device frame interlock is correct for the cell in which it is to be used A2 1 3 Confirm that the correct ground and test device has been chosen...

Page 24: ...gear instruction manual E50001 F710 A236 X XXXX for type GM38 switchgear Close and latch the door of the circuit breaker cell and rack the type 38 3AH3 GTD ground and test device to disconnected position using the same procedures as for racking the type 38 3AH3 38 kV circuit breaker Release the latches and open the cell door and remove the type 38 3AH3 GTD ground and test device from the circuit b...

Page 25: ...Type 38 3AH3 GTD ground and test device types on page 7 as well as Figure 4 Type 38 3AH3 GTD ground and test device type B for grounding lower studs front view on page 13 Figure 5 Type 38 3AH3 GTD ground and test device type B for grounding lower studs side view on page 14 Figure 6 Type 38 3AH3 GTD ground and test device type D for grounding upper studs front view on page 15 Figure 7 Type 38 3AH3 ...

Page 26: ...e the second key found in this interlock A2 2 4 3 The key removed from the key transfer interlock may then be applied at the selector switch to unlock the switch A2 2 5 Insert and rack the ground and test device to the CONNECT position Refer to racking instructions contained in the switchgear instruction manual E50001 F710 A236 X XXXX for type GM38 switchgear Close and latch the door of the circui...

Page 27: ... selector switch be padlocked in this position to prevent unauthorized opening of the device which would remove the ground from the primary circuit The pushbutton station and control cable may be unplugged coiled and stored In a manner similar to step A2 2 6 on page 26 perform voltage measurements on each phase to confirm that the desired studs are de energized A2 2 12 When it is desired to remove...

Page 28: ...ton control station is as far from the switchgear compartment to be grounded as possible and off to the side rather than in front of the switchgear compartment to be grounded Verify that no person is in the area in front of the switchgear compartment Depress the open pushbutton on the remote pushbutton station The ground and test device will open This will remove the ground from the selected prima...

Page 29: ...not remove the key A2 3 5 Insert and rack the ground and test device to the CONNECT position Refer to racking instructions contained in the switchgear instruction manual E50001 F710 A236 X XXXX for type GM38 switchgear Close and latch the door of the circuit breaker cell and rack the type 38 3AH3 GTD ground and test device to connected position using the same procedures as for racking the type 38 ...

Page 30: ...3 8 After completing the dielectric or insulation resistance testing procedure remove all related test equipment Remove the ground and test device from the compartment observing the racking instructions contained in the switchgear instruction manual E50001 F710 A236 X XXXX for type GM38 switchgear Close and latch the door of the circuit breaker cell and rack the type 38 3AH3 GTD ground and test de...

Page 31: ... LOWER STUDS ONLY ELEMENTARY DIAGRAM Item Description 1 Remote control cable receptacle 2 Selector switch and key interlock with padlock provision 3 Padlock provision 4 Test port 5 Spring condition indicator 6 Contact condition indicator 7 Frame interlocks and closed device interlock 8 Lower test ports and test port slide 1 2 8 5 6 7 3 4 4 4 Operation device types E and F ...

Page 32: ... Figure 11 Type 38 3AH3 GTD ground and test device type E for grounding lower studs side view Item Description 1 Lower test ports 2 Lower test well 3 Vacuum interrupter 4 Lower conductive primary 2 4 3 1 ...

Page 33: ...SE FOR GROUNDING UPPER STUDS ONLY ELEMENTARY DIAGRAM Item Description 1 Upper test ports and test port slide 2 Remote control cable receptacle 3 Padlock provision 4 Test port 5 Selector switch and key interlock with padlock provision 6 Spring condition indicator 7 Contact condition indicator 8 Frame interlocks and closed device interlock 1 3 4 4 4 2 6 7 5 8 ...

Page 34: ... Figure 13 Type 38 3AH3 GTD ground and test device type F for grounding upper studs side view Item Description 1 Upper test ports 2 Upper test well 3 Vacuum interrupter 4 Upper conductive primary 1 2 4 3 ...

Page 35: ... device arranged to ground lower studs type E Lower stud test port Ground Grounding switch Lower stud conductive Verify connections of upper studs and lower studs in the switchgear circuit breaker compartment Device type E is designed to ground lower studs and device type F is designed to ground upper studs Confirm that the device selected will ground the desired studs in the switchgear compartmen...

Page 36: ...rounded Hazardous voltage and high currents Can cause death serious injury and property damage Extend the control cable to its full length Use the CLOSE OPEN pushbutton control station as far from the switch gear compartment to be grounded as possible and off to the side rather than in the front Make sure that no person is in the area in front of the switchgear com partment to be grounded Hazardou...

Page 37: ...entary diagram for device arranged to ground upper studs type F on page 35 for device arranged to ground the upper studs will aid understanding B1 2 The following should be available B1 2 1 Ground and test device appropriate to the studs upper or lower which are to be grounded B1 2 2 Remote close trip pushbutton control station consisting of two normally open pushbuttons and a long control cable t...

Page 38: ... the user B1 4 4 Install remote control cable and pushbutton station The cable plug mates with a receptacle on the control panel of the ground and test device B1 4 5 Refer to the ground and test device rating plate located on the front of the device and determine the correct control voltage Control power may be applied by use of the split plug jumper accessory or the test cabinet accessory whichev...

Page 39: ... position and padlocked or locked by key if desired B1 4 9 An opening operation requires that the selector switch be moved to the TRIP or OPEN position In this position depress the open pushbutton and observe that the ground and test device opens Confirm the panel indicator shows that the ground and test device is open B1 4 10 The sequence allowed by the control circuit is as follows l Selector sw...

Page 40: ... 33 Figure 13 Type 38 3AH3 GTD ground and test device type F for grounding upper studs side view on page 34 Figure 14 Elementary diagram for device arranged to ground lower studs type E on page 35 and Figure 15 Elementary diagram for device arranged to ground upper studs type F on page 35 B2 1 4 Check to make certain that the test port slide may be opened and that the selector switch is locked in ...

Page 41: ...r removing the type 38 3AH3 38 kV circuit breaker Close the cell door and secure latches B2 2 Procedure for grounding It is imperative that the user become totally familiar with every aspect of a ground and test device before using it The user must be certain which primary circuits connect to each primary disconnect stud and the user must know if these circuits are or could be energized due to bac...

Page 42: ...2 2 5 Insert and rack the ground and test device to the CONNECT position Refer to racking instructions contained in the switchgear instruction manual E50001 F710 A236 X XXXX for type GM38 switchgear Close and latch the door of the circuit breaker cell and rack the type 38 3AH3 GTD ground and test device to connected position using the same procedures as for racking the type 38 3AH3 38 kV circuit b...

Page 43: ...nt of the switchgear compartment to be grounded Verify that no person is in the area in front of the switchgear compartment Depress the close pushbutton on the remote pushbutton station The ground and test device motor should begin to charge the closing spring and when the spring charging cycle is complete the ground and test device should immediately close When the ground and test device closes t...

Page 44: ... in front of the switchgear compartment to be grounded Verify that no person is in the area in front of the switchgear compartment Depress the open pushbutton on the remote pushbutton station The ground and test device will open This will remove the ground from the selected primary studs Confirm that the open close indicator on the ground and test device indicates the device is open B2 2 15 Remove...

Page 45: ...38 3AH3 38 kV circuit breaker Close the cell door and secure latches B2 3 The procedure for dielectric testing or insulation resistance testing of primary circuits It is imperative that the user become totally familiar with every aspect of a ground and test device before using it The user must be certain which primary circuits connect to each primary disconnect stud and the user must know if these...

Page 46: ... tested is de energized B2 3 6 If the tests indicate that the studs to be tested are de energized dielectric testing or insulation resistance testing may be performed in accordance with the procedures provided by the supplier of the dielectric or insulation resistance testing equipment A2 3 7 After completing the dielectric or insulation resistance testing procedure remove all related test equipme...

Page 47: ...ose non spring return l TS T Selector switch trip non spring return l PB C Pushbutton close l PB T Pushbutton trip Schematic shown with l Closing springs discharged l Ground and test device open l Ground and test device located in DISCONNECT TEST or CONNECT position Pushbutton enclosure 4 C cable White Red Black Green Receptacle plug Ground and test device mounted receptacle W R X R Y R G R 34 33 ...

Page 48: ...on an actual case or on as designed parameters and therefore should not be relied upon for any specific application and does not constitute a performance guarantee for any projects Actual results are dependent on variable conditions Accordingly Siemens does not make representations warranties or assurances as to the accuracy currency or completeness of the content contained herein If requested we ...

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