8DJH
The one that fits all
Gas-Insulated Medium-Voltage Switchgear
Prepared by: Lai Minh Bao
© Siemens AG 2018 siemens.com/medium-voltage-switchgear
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Installation Guide
Store before installation
➢ All panels must be kept in door & in dry area
➢ All accessories must be kept in dry area as well
➢ When cubicles are stored, the equipment must remain in its original packing
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Installation Guide
Condition for installation
8DJH switchgear is a factory-assembled, type-tested, 3-pole metal-enclosed single-busbar switchgear for indoor installation. The normal operating conditions
are defined in IEC 62271-1. In the edition 1.0 (October 2007) of this standard, they are identified for indoor switchgear as follows:
➢ Maximum ambient air temperature 40°C; 35°C not exceeded in the 24-h mean
➢ Negligible sun radiation
➢ Maximum site altitude 1,000 m above sea level
➢ No significant amounts of dust, smoke, flammable and/or corroding gases, vapors or salt
➢ Maximum air humidity 95% in the 24-hour mean; 90% not exceeded in the monthly mean
➢ Maximum water vapor pressure 2.2 kPa in the 24-hour mean; 1.8 kPa not exceeded in the monthly mean
➢ Vibrations or impacts are negligible as against those caused by normal switchgear operation.
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Installation Guide
Installation Guide
Single busbar
Installation standard
Wall-standing Free-standing
arrangement arrangement
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Installation Guide
Installation Guide
Checking before installation:
➢ Check the ready-for-service indicator for SF6 gas.
➢ Inform the forwarding agent immediately about any defects or transport damages; if required, refuse to accept the delivery.
➢ Check base frame level: max 1mm/m & 2 mm for the total length
➢ The cable basement must allow adequate space for connecting and laying the connection cables.
➢ The pressure relief rooms must be according to the dimensional drawing in the switchgear documentation.
➢ The dimensions of the floor openings must be according to the dimensional drawing in the switchgear documentation.
➢ Do not violate the minimum cable bending radius of the connection cables.
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Installation Guide
Dimension:
Item Type of feeder Dimension in mm (WxDxH)
1 Circuit Breaker (1) 430x775x1400 (without LV box)
2 Circuit Breaker (2) 500x775x1400 (without LV box)
3 Bus sectionalizer 500x775x1400 (without LV box)
4 Disconnector 310x775x1400 (without LV box)
5 Fuse switch Disconnector 430x775x1400 (without LV box)
6 Metering panel 840x775x1400 (without LV box)
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Installation Guide
Installation Guide
Outdoor enclosure: example
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Installation Guide
Installation Guide
Transportation: example
1. Pallet
2. Bolted joint between transport unit and pallet
3. Transport eyes
4. Clearance for fork-lift trucks
5. Cable compartment cover
6. Ready-for-service indicator
7. Center of gravity
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Installation Guide
Installation: Fastening the switchgear with bolts
➢ Bring the switchgear into position.
➢ Remove the cable compartment cover
➢ If required, remove the cross member
➢ The switchgear must rest flush on the foundation; if necessary, lay shims underneath.
➢ Fasten the panels at the following fixing points using bolts M8 (see example)
+ Fasten end panels at least at 4 fixing points; 1 x at the front, 1 x at the rear, and 2 x laterally
+ Fasten intermediate panels at least at 2 fixing points; 1 x at the front and 1 x at the rear
+ Fasten panels with floor covers at all available fixing points
1. Conical spring washer M8 (DIN 6796)
2. 3D washer M10 (DIN EN ISO 7093)
3. Bolt M8
4. Panel frame
5. Foundation or foundation rail
Fixing points (example, top view) Fastening the panel to the foundation
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Installation Guide
Installation: Earthing the switchgear
➢ Connect the switchgear to the substation earth at the earthing point.
1. Earthing point (earthing bolt M12)
Earthing point (view from outside Earthing point
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Installation Guide
Installation: Connecting high-voltage cables
Common features and suitable cable plugs.
1. Cable T-plug (phase L1)
2. Cable T-plug (phase L2)
3. Cable T-plug (phase L3)
4. Earthing cable for plug housing and cable shield
5. Cable bracket
6. Cable clamp
7. Cross member (removable)
8. Bushing
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Installation Guide
Installation: Mounting cable-type current transformers
➢ Remove the cable compartment coveR
➢ If required, remove the cross member
➢ Take the supplied current transformers out of the cable compartment.
➢ Push the current transformers onto the high-voltage cables.
➢ Mount the cable plugs according to the manufacturer's stipulations.
➢ Adjust the position of the current transformer mounting plates..
➢ Lead the cable shield back through the current transformer.
➢ Swing the high-voltage cables in together with the cable-type current transformers and connect the cable plugs to the
bushings.
➢ Install the current transformers.
➢ Mount the cross member
1. High-voltage cable
2. Cable shield
3. Current transformer
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Operation Guide
Nameplate of panel
1. Switchgear type and year of manufacture
2. Serial number
3. Internal arc classification (option)
4. Technical data
5. Number of operating instructions
Nameplate on the front Nameplate in the operating
mechanism compartment
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Operation Guide
Indicators and control elements
Control board for switch-disconnector Control board for switch-fuse combination Control board for circuit-breaker type 2
1. Ready-for-service indicator 1. Ready-for-service indicator 1. Ready-for-service indicator
2. Actuating opening for switch-disconnector 2. ON pushbutton 2. ON pushbutton for circuit-breaker
3. Locking device 3. Locking device 3. Actuating opening for disconnector
4. Padlock 4. Padlock (option) 4. Position indicator for disconnector
5. Actuating opening for earthing switch 5. Actuating opening for earthing switch 5. Three-position switch-disconnector locking device
6. Position indicator for earthing switch 6. Position indicator for earthing switch 6. Actuating opening for earthing switch
7. Position indicator for switch-disconnector 7. Position indicator for switch-Disconnector 7. Position indicator for earthing switch
8. OFF pushbutton 8. Circuit-breaker locking device
9. Actuating opening for "spring charging“ 9. Actuating opening for "spring charging“
10. "Spring charged" indicato 10. Position indicator for circuit-breaker
11. Operations counter
12. OFF pushbutton for circuit-breaker
13. "Spring charged" indicator
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Operation Guide
Position indicators
EARTHED FAULTY
Switch position CLOSED OPENED
READY TO EARTH POSITION
Disconnector
Earthing switch
Circuit-breakers
Switch-disconnectors
Earthing switch
Operations counter: One operating cycle corresponds to one closing operation and one opening operation of the
circuit-breaker
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Operation Guide
"Fuse tripped" indicator: Shows the state of the fuse-links of the switch-fuse combination.
"Spring tensioned" indicator
Closing spring tensioned Closing spring not tensioned
Ready-for-service indicator:
The ready-for-service indicator shows if the gas density in the gas-insulated switchgear vessel is in order.
Before starting assembly work, check the service readiness of the switchgear.
1. Switchgear ready for service (green area)
2. Switchgear not ready for service (red area)
3. Pointer
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Operation Guide
Operating the Ring panel – R feeder
Connecting
the feeder to
the busbar
Initial position => Insert operating lever End position
Push control gate upwards
and turn 70° clockwise.
Three-position switch closes
Disconnecting
the feeder from
the busbar
End position
Initial position Push control gate upwards => Insert operating lever
and turn approx. 70°
counter-clockwise.
Three-position switch opens
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Operation Guide
Operating the Ring panel – R feeder
Earthing the
feeder
Initial position Push control gate upwards => Insert operating lever End position
and turn 55° clockwise.
Earthing switch closes
De-earthing the
feeder
Initial position Push control gate upwards => Insert operating lever and End position
turn 55° counter-clockwise.
Earthing switch opens
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Operation Guide
Operating the transformer panel – T feeder
Connecting
the feeder to
the busbar
Insert operating lever and turn 70°
Initial position Push control gate upwards clockwise until the "spring charged“ End position
indication appears in the inspection window
Remove operating lever
The closing and opening springs of the
transformer panel are charged. Actuate ON
pushbutton.
Disconnecting
the feeder from
the busbar
Initial position => Actuate OFF pushbutton End position
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Operation Guide
Operating the transformer panel – T feeder
Earthing the
feeder
Insert operating lever and turn 55°
Initial position Push control gate upwards clockwise. Earthing switch closes. End position
Remove operating lever
De-earthing the
feeder
Insert operating lever and turn 55°
Initial position Push control gate upwards counter-clockwise. Earthing switch End position
opens
Remove operating lever
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Operation Guide
Replacing HV HRC fuse-links in the auxiliary transformer panel; switch-disconnector panel and metering panels
When a HV HRC fuse-link has tripped, the HV HRC fuse-links in the two other phases may also have been stressed =>
Replace the HV HRC fuse-links in all 3 phases
The HV HRC fuse compartment cover can only be removed if the earthing switch is in EARTHED position.
When the HV HRC fuse compartment cover is removed, the earthing switch is interlocked in EARTHED position.
Remove
defect fuses
Install new
fuses
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Operation Guide
Operating the Circuirt Breaker panel – L feeder
Closing the
feeder
Insert operating lever and turn 55°
Initial position => Push control gate upwards End position
clockwise. Earthing switch closes.
=> Insert operating lever and turn 70°
Remove operating lever
clockwise. Three-position switch closes
=> Remove operating lever.
=> Control gate of disconnector moves to
center position automatically.
Opening the
feeder
Insert operating lever and turn 55°
Initial position Push control gate upwards counter-clockwise. Earthing switch End position
opens
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Remove operating lever
Operation Guide
Operating the Circuirt Breaker panel – L feeder
Closing the
feeder
=> Push control gate upwards Push control gate of circuit-breaker upwards.
Initial position End position
=> Insert operating lever and turn 70° Insert operating lever.
clockwise. Three-position switch closes Turn operating lever 70° clockwise until the
=> Remove operating lever. "spring charged" indication appears in the
=> Control gate of disconnector moves to inspection window.
center position automatically. Closing and opening springs of circuit-breaker
are charged. Actuate ON pushbutton
Opening the
feeder
Push control gate of disconnector upwards.
Initial position Actuate OFF pushbutton of circuit- Insert operating lever and turn 70° counter- End position
breaker. clockwise. Three-position switch opens.
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Remove operating lever
Operation Guide
Operating the Circuirt Breaker panel – L feeder
Earthing the
feeder
Insert operating lever and turn 55°
Initial position Push control gate of End position
clockwise.
disconnector downwards.
Earthing switch closes.
Actuating opening is free.
Remove operating lever.
Control gate moves to center position
automatically.
De-earthing the
feeder
Insert operating lever and turn 55°
Initial position Push control gate of disconnector End position
counter-clockwise. Earthing switch opens..
downwards.
Remove operating lever. 24
Actuating opening for earthing
Control gate moves to center position
switch is free.
automatically.
Operation Guide
Note:
1. Replace all 03 fuses if any ones is blown
2. Check the fuse direction while install the fuses
3. Checking manual document if change rate of fuses
4. The voltage indicators can be damaged by the test voltage during the cable test => Short-circuit the voltage indicators
at the earthing points of the test sockets using short-circuit plugs.
5. Checking auxiliary voltage before turn ON MCBs inside panels.
6. Remove all connecting plug for MCU, relays, meter.. Before dielectric test for auxiliary circuit (limit 1kV, 1s)
7. Remove Surge Arrestors, voltage transformer before dielectric test for main circuit (limit 50kV, 1 min).
8. Read the nameplates in the front panels to define type of panels before operation
9. Using incorrect operating levers can damage or deactivate the safety equipment of the switchgear.
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Maintenance Guide
Maintenance
1. The switchgear, the circuit-breakers in use and the vacuum contactors do not require maintenance under normal
operating conditions.
2. The switchgear vessel represents a hermetically sealed pressure system (sealed pressure system) according to
IEC 62271-200. Maintenance of the insulating gas is not required.
3. Secondary equipment: Inspection/testing of the secondary equipment such as the capacitive voltage detecting
system is done within the scope of national standards and customer-specific regulations
4. Checking the dew point: The dew point needs no checking throughout the entire service life.
5. Checking the gas quality: The gas quality needs no checking throughout the service life.
6. Replacement of components: Due to the fact that all parts of this switchgear have been optimized to last the
normal service life, there is no need to recommend particular spare parts.
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