GE SecoGear, User Manual

Page 1: ...24kV 27kV Air Insulation Switchgear User Manual Gear GE Industrial Solutions...

Page 2: ...nce to internal arc faults Optional Keylock Optional Padlock Optional Typical Modules Figures 3 1 Enclosure and Partitioning Figure 3 2 Switchgear Structure Cable Connections Operations and trouble sh...

Page 3: ...eplacement of the main busbar Inspection and replacement of the xed contact and spout bushing Inspection and replacement of the shutter mechanism Replacing the earthing switch Replacing the current tr...

Page 4: ...arning symbol Make sure that the speci ed data are not exceeded under switchgear or switchboard operating conditions Keep the instruction manual accessible to all personnel involved in installation op...

Page 5: ...ration and maintenance of SecoGear air insulated switchgear These instructions are also used as references for personnel to carry on regularly maintenance of the switchgear Standard and Speci cation S...

Page 6: ...to account Increased ambient temperatures must be compensated for in the design of the busbar and the branch conductors as well as the withdrawable parts otherwise the current carrying capacity will b...

Page 7: ...yethylene sheeting o Transport drying agent bags included o Moisture indicator included Observe the directions for use of the drying agent bags Note the following o Drying agent color observed blue in...

Page 8: ...uences Panels with basic packing or without packing A dry well ventilated storeroom with a climate in accordance with IEC62271 1 2007 Store the panels upright Do not stack panels Panels with basic pac...

Page 9: ...asuring length of 1m Straightness tolerance 1mm per 1m but not more than 3mm over entire length of frame Cross section view of switchgear room layout plan view Switch room cable duct arrangement Side...

Page 10: ...3 Rated voltage kV 24 27 Rated power frequency withstand voltage kV 50 65 Rated lightning impulse withstand voltage kVp 125 125 Rated frequency Hz 50 60 Rated current A 1250 2500 Rated short circuit...

Page 11: ...ear side direction if an internal arc fault occurs in an a ected compartment The pressure relief protects damage to switchgear components and the risk of injury to personnel which may endanger an oper...

Page 12: ...when the earthing switch in open position Figure Functional truck racking in lock Figure 2 5 Earthing switch in open position Figure 2 6 Earthing switch in close position Key lock is locked key is fr...

Page 13: ...reaker Racking in out operation can be done only when lock cover is in the open position Figure 2 9 Padlock for Circuit breaker racking in out operation Padlock for earthing switch operation Padlock f...

Page 14: ...nternal overpressure the plastic screws are the point of rupture caused by arc conditions The top mounted pressure relief aps on the enclosure are made from mesh metal All compartments are accessible...

Page 15: ...ct spouse 7 Primary disconnect 8 Current transformer 9 Earthing switch 10 Rear door interlock 11 Bottom plate 12 Partition between breaker compartment and busbar compartment 13 Terminal block 14 Contr...

Page 16: ...itchgear 13 Figure 3 5 Busbar tie panel 1250 2500A Figure 3 6 Riser panel 1250 2500A Figure 3 7 Measuring panel 1250 2500A Figure 3 8 VT Panel 2500A SCALE 1 000 1 0 A B C A B C SCALE 1 000 1 0 95 5 76...

Page 17: ...Figure 3 11 CPT panel 2500A Figure 3 12 Typical dimensions and Weights of SecoGear including withdrawable circuit breaker parts Description Dimension in mm 27kV Height A 2400 Width Rated current of b...

Page 18: ...and tted with HRC fuses The earthing switch can be operated manually with position indication by mechanical indicator on the driveshaft and auxiliary switch Three lightning arrestors optional can be...

Page 19: ...commissioning Warning a Comply with all relevant safety regulations b Maintain circuit breakers in disconnection position c Remove earth wires and short wires of the hazardous areas d Pay attention to...

Page 20: ...he breaker compartment c Move the transfer truck to the front of the switchgear turn the adjusting nut to adjust the height of the transfer truck platform See gure 4 2 Aim the guiding pin at the guidi...

Page 21: ...n g Take o the racking crank The racking operation is now complete Warning The truck is not allowed to be placed in any intermediate position between disconnect test position and operating position Mo...

Page 22: ...nsure the earthing switch is fully open Interlocking of the switchgear The circuit breaker can be closed only when fully engaged in the test or service position The control plug can be released when t...

Page 23: ...Interlock 4 Undercarriage and ES Interlock 5 Front Operation shaft 6 Back Break 7 Back Interlock Shaft 8 Back Door Interlock SEQUENCE OF EARTHING SWITCH OPERATION Closing the earthing switch Press the...

Page 24: ...y the inspection of some equipment components such as wearable parts and the maintenance intervals maintenance period depend on the running time operating frequency and the number of short circuit cyc...

Page 25: ...e limit where the mechanical OPEN indication stays exactly below the operating hole The cable compartment door can not be closed opened The earthing switch is not completely opened Open the earthing s...

Page 26: ...ust be shutdown before scheduled switchgear service and the work area must be isolated Measures must be taken to disallow the power being switched on Ensure proper earthing and padlocks in place Speci...

Page 27: ...f sparking or wear and tear Check the shutter mechanism in the circuit breaker compartment Check the interlocking between the circuit breaker and the earthing switch Check the bolted connection betwee...

Page 28: ...y and secondary cables Check the heater condition Check the breaker and cable compartment for unexpected objects Check the secondary connections of the CTs Check the current terminals in the low volta...

Page 29: ...shutter mechanism and insert two M8 bolts into the overlapping holes on the shafts See gure 6 2 Then the xed contact along with the spout bushing are visible Figure 6 2 shutter mechanism Inspect the c...

Page 30: ...ng switch includes changing the earthing switch along with labels for ON and OFF position the driving mechanism including driving gear assembly and drive rod The steps for replacement are as follows F...

Page 31: ...the xing bracket see gure 6 6 and then remove drive rod of the rear door interlock from rear door then draw out the drive rod backward Unscrew both of the bolts on the bevel gear See gure 6 7 Fixed sc...

Page 32: ...ve the 6 pcs of M8 bolts on the mounting plate of the current transformer Figure 6 11 Mounting plate of the current transformer Support the mounting plate of the current transformer and then put on th...

Page 33: ...If the display Lock on the potential indicator is ashing and an abnormal sound from the relay is continuously heard there may be two reasons that can cause this problem First there may be a problem wi...

Page 34: ...should be connected before doing the routine tests and installation of the Switchgear in the field As the grading ring is casted into the wall bushing the wall bushing and the main busbar should be c...

Page 35: ...ollows Con rm the equipment be powered o and make sure to follow proper safety measures One side of conductor is connected with wall bushing by using one screw M5X8 and a at washer required torque is...

Page 36: ...T 32 0 9 265 21 11 Finland Kuortaneenkatu 2 FI 00510 Helsinki T 358 0 10 394 3760 France Paris Nord 2 13 rue de la Perdrix F 95958 Roissy CDG C dex T 33 0 800 912 816 Poland Ul Odrowaza 15 03 310 War...