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500-8384.9 • Version 11 • Installation and Operating Instructions • 8DJH
Position of retaining bolt
Function
A
Undervoltage release blocked
B
Undervoltage release free
1. Remove the front cover, [
Page 127, "Removing and mounting the front cover"] and
observe the instructions specified there.
2. Unscrew the retaining bolt of the striker at the undervoltage release.
3. Insert the retaining bolt of the striker in the desired position again.
4. Refit the front cover.
8.5 Preparing the power-frequency voltage test
A power-frequency voltage test can be performed at the readily installed switchgear.
1. Remove voltage transformers.
2. Remove surge arresters and surge limiters.
3. Cover bushings of voltage transformers, surge arresters and surge limiters in a surge-proof
way with suitable sealing caps.
4. Short-circuit the current transformers at the secondary terminals.
5. Earth the capacitive test sockets.
✓
The power-frequency voltage test can now be performed.
8.6 Instructing the operating personnel
1. Instruct the operating personnel in theory and practice of switchgear operation.
8.7 Applying operating voltage
DANGER
Mortal danger due to internal arc or electric shock
If the following instructions are not carried out, applying operating voltage can cause an
internal arc or electric shock.
⇨ Install the switchgear according to the installation instructions and drawings supplied.
⇨ Fit all covers and bolt them tight.
⇨ Switch all circuit-breakers to OPEN position.
⇨ Switch all three-position disconnectors and three-position switch-disconnectors in all
panels to OPEN position.
⇨ Ensure consistent phase sequence in the entire switchgear assembly. Check the phase
sequence in all incoming and outgoing feeders assembly before connecting them to the
busbar.
⇨ Earth feeders without connected connection cables. Close all bushings in a surge-proof
way.
⇨ Switch off the consumers connected to all outgoing feeders.
⇨ Short-circuit unused current transformers on the secondary side.
⇨ Operate unused voltage transformers open on the secondary side.
⇨ Perform electrical and mechanical and function test successfully.
⇨ Observe the specifications for prevention of accidents.
⇨ Instruct the operating personnel in theory and practice of switchgear operation.
⇨ Observe the operating instructions and work instructions of the switchgear operator.
Energizing incoming feeders
1. Energize all incoming feeders in the respective opposite substation.
Содержание 8DJH
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