4 ¤ Equipment and Functional Descriptions Content
4.5 Disconnector / Earthing Switch
4.5.2 Operating Mechanism
4.5.2.1 Manual Operation (Control Voltage Present)
With present control voltage the system is supervised.
Without control voltage the interlocking conditions are not controlled. Therefore, a secure operation isn’t anymore made sure. Because this case of operation can be dangerous to life or physical condition (i.E. switching short-circuit), is the oper-ation without control voltage allowed only for specially trained personal and can be carried out only with special tools.
For manual operation all interlocking conditions (“4.5.2.2 Locking”) have to be fulfilled.
The device has to be unlocked.
In emergencies the disconnector and the earthing switch can be operated locally di-rectly on the device by means of a handcrank. As soon as the handcrank is inserted, the motor circuit is automatically interrupted.
For manual operation of the disconnector / earthing switch the front cover has to be removed from the operating mechanism (Figure 4.5-7). The front cover is secured with 4 screws M6 (4 Nm).
1 2
1 Position indicator disconnector 2 Position indicator earthing switch
Figure 4.5-6: Operating Mechanism with Cover, Switching Contact in neutral Position WARNING!
Note
1HDG 918 747 E en 13.08.2009 EXTMEHA 21.08.2009 CHSFRVW 4.5-6
1 2
1 Position indicator disconnector 2 Position indicator earthing switch
Figure 4.5-7: Operating Mechanism after removal of its Cover, Switching Contact in neutral Position
Switching Positions of Handle
2 2 3
3 1 1
1 Local manual control (hand crank): Local control with hand crank possible
2 Interlock (electrically switchable) = Default setting: Local and remote control possible, control with hand crank not possible
3 Mechanically and electrically blocked Figure 4.5-8: Switching Positions of Handle Possible Combinations of Positions
Earthing switch ON Disconnector ON
Earthing switch OFF Disconnector OFF
1HDG 918 747 E en 13.08.2009 EXTMEHA 21.08.2009 CHSFRVW 4.5-7 Manual Operation of the Disconnector (Figure 4.5-9)
1 2 4,5
3 1 Locking bolt
2 Handle of interlocking slider 3 Opening
4 Cover
5 Blocking solenoid (not shown, behind 4) Figure 4.5-9: Operating Elements Disconnector (front view)
Precondition: Neutral Position
1. The earthing switch must be open
2. Optional: Remove padlock (if fitted), locking bolt retracts handle of interlocking slider is in middle position
3. Move handle (2) in direction switching position “local manual control” until mechanical resistance
4. In case of existing control voltage:
As soon as mechanical resistance is reached, wait for releasing by the oper-ating personal for remote control operation for the further moving of the handle
In case of breakdown of control voltage the operation is allowed only for specially trained personal and can be carried out only with special tools:
As soon as resistance is reached:
a) Remove cover (4) with tool
b) Unlock blocking solenoid (5) by pressing and hold c) Move handle (2) on position “local manual control”
5. After release for the further moving move handle (2) until mechanical end stop for releasing the hand crank opening (3) completely
6. Insert hand crank in opening (3)
7. Switch disconnector with hand crank ON or OFF 8. Turn hand crank until free-wheel
9. Remove hand crank
10. Tighten handle (2) and bring into neutral position 11. Pull locking bolt (1) and optional: Fit padlock
12. In case of breakdown of control voltage: Screw the cover (4) back again 13. Put the front cover back in place again and tighten the 4 screws with 4 Nm WARNING!
1HDG 918 747 E en 13.08.2009 EXTMEHA 21.08.2009 CHSFRVW 4.5-8 Operation Earthing Switch (Figure 4.5-10)
6 6
1 2
4,5 3
1 Locking bolt
2 Handle of interlocking slider 3 Opening
4 Locking screw
5 Blocking solenoid (not shown, behind 4) 6 Lock
Figure 4.5-10: Operating Elements Earthing Switch (front view) Precondition: Neutral Position
1. The disconnector must be open
(otherwise bring the disconnector into the OFF position first) 2. Optional: Remove padlock (if fitted), locking bolt retracts
3. Move handle (2) in direction switching position “local manual control” until mechanical resistance
4. In case of existing control voltage:
As soon as mechanical resistance is reached, wait for releasing by the oper-ating personal for remote control operation for the further moving of the handle
In case of breakdown of control voltage the operation is allowed only for specially trained personal and can be carried out only with special tools:
As soon as resistance is reached:
a) Remove cover (4) with tool
b) Unlock blocking solenoid (5) by pressing and hold c) Move handle (2) on position “local manual control”
5. After release for the further moving move handle (2) until mechanical end stop for releasing the hand crank opening (3) completely
6. Insert hand crank in opening (3)
7. Switch earthing switch with hand crank ON or OFF 8. Turn hand crank until free-wheel
WARNING!
1HDG 918 747 E en 13.08.2009 EXTMEHA 21.08.2009 CHSFRVW 4.5-9 9. Remove hand crank
10. Tighten handle (2) and bring into neutral position 11. Pull locking bolt (1) and optional: Fit padlock
12. In case of breakdown of control voltage: Screw the cover (4) back again 13. Put the front cover back in place again and tighten the 4 screws with 4 Nm
4.5.2.2 Locking
It is possible to lock the disconnector/earthing switch electrically and mechanically both, in the open and in the closed position.
In order to lock the disconnector/earthing switch, the cover must be removed from the operating mechanism (Figure 4.5-7).
After locking the device it can no longer be operated manually with the handcrank.
Disconnector Earthing switch
1 2 2 1
1 Locking bolt
2 Handle of interlocking slider
Figure 4.5-11: Operating Elements Disconnector and Earthing Switch (front view) Precondition: Neutral Position
1. Optional: Remove padlock (if fitted) ⇒ locking bolt retracts 2. Move handle (2) by pushing in position “locked”
3. Pull locking bolt (1) and fit padlock Note
1HDG 918 747 E en 13.08.2009 EXTMEHA 21.08.2009 CHSFRVW 4.5-10
4.5.3 Technical Data
4.5.3.1 Device
Table 4.5-1: Disconnector / Earthing Switch
Rated Values kV 60/72.5 110/126 132/145
Lightning impulse withstand voltage
to earth kV 325 550 650
Lightning impulse withstand voltage
a-cross isolating distance kV 375 630 750
Short-time power frequency withstand
voltage to earth kV 140 230 275
Short-time power frequency withstand
voltage across isolating distance kV 160 265 315
Frequency Hz 50 / 60
Rated current A 1250 / 1600 / 2000 / 2500
Peak current (at 31.5 kA / 40 kA) kA 80 / 100
Short-time withstand current kA 31.5 / 40
Duration of short time current s 3
1 min. power frequency withstand
volta-ge for auxiliary circuits kV 2
SF6 minimum functional pressure /
filling pressure (at 20°C) kPa 520 / 600
Weight without SF6 Weight of SF6-filling
(without transversal insertion module)
3-flange
4-flange
Weight of SF6-filling
(with transversal insertion module)
1HDG 918 747 E en 13.08.2009 EXTMEHA 21.08.2009 CHSFRVW 4.5-11
4.5.3.2 Operating Mechanism
Table 4.5-2: Motor with Permanent Magnet Excitation
Ratings DC/AC V 60 110 125 220 250
Tolerance range % 15/+10 15/+10 28/+12 15/+10 28/+12
Standard* IEC IEC ANSI IEC ANSI
Power W 200
Start-up current A 15 12 12 6 6
Continuous current A 3 3 3 1.5 1.5
Operating mode Short-time operation S2 = 10 sec
* IEC 60694, ANSI C37.06-1987 & ANSI C37.33-1987
Table 4.5-3: Operating Times for Disconnector / Earthing Switch
Voltage DC (IEC) V 0,85 Un 1,1 Un
Voltage DC (ANSI) V 0,72 Un 1,15 Un
Closing time (contact making) ms p 2000
Opening time (contact separation) ms p 1500
Table 4.5-4: Motor Runtime
Ratings DC V 60 110 125 220 250
Disconnector ms p 3000
Earthing switch ms p 3000
Table 4.5-5: Contact Stroke
Device Stroke
Disconnector mm 89 - 98
Earthing switch mm 89 - 98
If the operating mechanism is equipped with an anti-condensation heater, it is vented.
The technical data of the heater are listed in chapter “Equipment and Functional Descriptions” in document “Anti-condensation Heater”.
Note
1HDG 918 747 E en 13.08.2009 EXTMEHA 21.08.2009 CHSFRVW 4.5-12