Sungrow MVS6250 - Checking before Power-On and Power-Off; MV Station Container Checks; MV Switchgear Pre-Power-On Checks

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7 Checking before Power-On and Power- Off
NOTICE
The operations described in this chapter must be performed by professional
personnel in accordance with local regulations/standards.
7.1 MV Station Container
No.
Checking item
1
The installation conforms to the design requirements.
2
The container is level, and each door can be opened properly.
3
There is no crack, dent, or scratch on the container surface. Repaint areas with
paint flake-off (if any).
4
Each container has at least two ground points and is grounded securely with a
ground resistance of 4Ω or less.
5
The number and positions of external accessories conform to the enclosed
document.
6
All markings are correct, clear, and complete.
7.2 MV Switchgear
No.
Checking item
1
There is no crack, dent, or scratch on the cabinet surface.
2
The SF6 barometer pointer is in the green zone.
3
Rotate the current terminal, disconnect the scriber of the current terminal, and
measure the resistance at both ends of the fracture. The value of three-phase
resistance should be small and close. After the measurement, restore the current
terminal to the connection position and tighten it. The standby current loop shall
be shorted and grounded.
4
Apart the grounding wire of the secondary circuit and measure secondary loop to
the ground resistance and resistance should be M Ω level. Recover the grounding
wire and the resistance shall be 0 Ω.