Voltage Transformers - Siemens NXPLUS C Installation And Operating Instructions Manual

Description
Mounting locations
Busbar
Instrument transformer types
• 4MT2 (up to 24 kV)
Panel types
• Circuit-breaker panel
• Switch-disconnector panel
with fuses
• Vacuum contactor panel
with fuses
• Ring-main panel
• Auxiliary transformer panel
• Bus sectionalizer panel (LK-LS)
• Disconnector panel
Features of the instrument transformer types
4MT2, 4MT26
• Pluggable in the cross adapters of the busbar
• No separate metering panel required
• Repeat test at 80 % of the rated short-duration
power-frequency withstand voltage possible with
mounted voltage transformer
• Touchable due to metal enclosure
• Safe-to-touch due to the metal enclosure of
the switchgear
• Pluggable
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Voltage transformers

Voltage transformers of the 4MT2, 4MT3, 4MT26, 4MU1 or 4MR type in the NXPLUS C
switchgear can be installed as an option.
Common features
• According to VDE 0414-9-3 and IEC 61869-3
• Cast-resin insulated
• Inductive type
• Arranged outside the primary enclosure (switching-device vessel)
Panel connection
• 4MT26 (up to 38 kV) • 4MT3 (up to 24 kV)
• Circuit-breaker panel • Circuit-breaker panel (600 mm)
• Disconnector panel • Disconnector panel
• Metering panel
4MT3, 4MU1
• Switchable through gas-insulated disconnecting
facility in the switching-device vessel
• Switch position: "CLOSED" and "EARTHED"
• Operation of the disconnecting facility from outside
through a metal bellows welded in the switching-
device vessel.
• Voltage testing on switchgear and cable possible with
mounted and earthed voltage transformer
• Not suitable for 80 % of the rated short-duration
power-frequency withstand voltage (disconnect and
earth the voltage transformer through the
disconnecting facility)
Revision 02 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 806-9004.9
Instrument transformer
compartment
• 4MU1 (up to 38 kV) • 4MR (up to 24 kV)
• Circuit-breaker panel • Air-insulated metering
panel
• Disconnector panel
4MR
• Block-type voltage transformer
• Mounted on instrument
transformer cassette
• Connection via flexible wire
• Air-insulated