Name: Siemens NXPLUS C
Brand: Siemens
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Medium-Voltage Switchgear

Type NXPLUS C Fixed-Mounted Circuit-Breaker Switchgear up to 24 kV,

Extendable

Single Busbar, Metal-Enclosed, Gas-Insulated

M edium -V oltage Switc hgear

INSTALLATION AND

OPERATING

INSTRUCTIONS

Order No.: 802-9081.9

Revision: 11

Issue: 19-01-2018

Default Chapter3
- Table of Contents3
1 Signal Terms and Definitions6
2 General Instructions6
- Safety Instructions6
3 Security8
4 Due Application9
5 Qualified Personnel9
6 Features10
7 Panel Types12
- Circuit-Breaker Panels13
8 Examples for Panel Versions13
- Disconnector Panels17
- Bus Sectionalizer19
- Switch-Disconnector Panel21
- Vacuum Contactor Panel22
- Metering Panel23
- Ring-Main Panel23
- Circuit-Breaker24
9 Components24
- Vacuum Contactor25
- Three-Position Disconnector26
- Three-Position Switch-Disconnector26
- Operating Mechanisms for Three-Position Switch27
- Voltage Transformers 4MT28
- Current Transformers 4MC31
- HV HRC Fuse Assembly32
- Busbar System33
- Cable Connection34
- Ready-For-Service Indicator52
- Interlocks53
- Accessories54
- Voltage Detecting Systems54
- Complete Switchgear58
10 Technical Data58
- Iec 62271-20059
- Standards, Specifications, Guidelines60
- Selection of HV HRC Fuse-Links61
- Motor Protection Table (with HV HRC Fuses Make SIBA)70
- Fuse Protection Table for Metering Panel (with HV HRC Fuse-Links Make SIBA)71
- Rating Plates72
- Vacuum Circuit-Breaker72
- Three-Position Disconnector for Circuit-Breaker, Disconnector and Bus Sectionalizer Panels ≥ 1000 a76
- Three-Position Switch-Disconnector for Switch-Disconnector Panels, Ring-Main Panels and Circuit-Breaker Panels up to 630 A, Vacuum Contactor Panel and Metering Panel76
- 10.11 Endurance Classes77
- Vacuum Contactor78
- 10.13 Insulating Gas79
11 End of Life80
12 Constructional Stipulations81
- Installation81
- Switchgear Room81
- Constructional Data of the Foundation84
- Transport Units94
13 Before Installation96
- Intermediate Storage96
- Preliminary Clarifications96
- Tools/Auxiliary Means97
- Comments on Electromagnetic Compatibility98
- Completeness and Transport Damages100
- Packing and Transport Unit100
14 Unloading and Erecting the Switchgear100
- Unloading and Transporting to Place of Installation101
- Checking the Ready-For-Service Indicator105
15 Assembling the Switchgear107
- Aligning and Joining the Panels108
- Fastening the Panel to the Foundation110
- Removing Transport Braces110
- Assembling the Busbars111
- Mounting the Busbar Support122
- Installi Ng Current Transformers on the Busbar124
- Installing Busbar Voltage Transformers127
- Interconnecting the Earthing Busbars132
- Switchgear Earthing132
- 15.10 Installing the Low-Voltage Compartment133
- 15.11 Installing the Horizontal Pressure Relief Duct134
- 15.12 Installing the Switchgear Termination143
- 15.13 Mounting the Busbar Covers144
- 15.14 Mounting the Air Guides151
- 15.15 Extension with Individual Panels154
16 Electrical Connections154
- Installation Work at the Floor Cover155
- Connecting Cable T-Plugs158
- Panels 2000 A, 2500 a with Double Connections163
- Connecting Surge Arresters164
- Connecting Surge Limiters165
- Connecting Auxiliary Circuits166
17 Installation of Degree of Protection Versions IP31D, IP32D and IP34D171
- IP31D - Protection against Vertically Falling Water Drops171
- IP32D - Protection against Vertically Falling Water Drops for Switchgear Inclined up to 15175
- IP34D - Protection against Splashing Water from any Direction176
18 Commissioning177
- Final Work177
- Checking the Accessories179
- Function Test / Test Operation179
- Instructing Operating Personnel179
- Performing the Power- Frequency Voltage Test183
- Applying Operating Voltage184
- Correcting Circuit Diagrams184
- Primary Injection Test184
- Operation186
19 Control Elements and Indicators187
- Operations Counter188
- Position Indicators188
- Spring Charged" Indicator188
- Circuit-Breaker Locking Device for "Feeder Earthed189
- Ready-For-Service Indicator189
- Charging the Closing Spring190
- Closing the Circuit-Breaker190
- Opening the Circuit-Breaker190
20 Operating the Circuit-Breaker190
- Circuit-Breaker Test Operation191
21 Operating the Three-Position Switch192
- Closing the Three-Position Switch193
- Opening the Three-Position Switch193
- De-Earthing with the Three-Position Switch194
- Earthing/Ready-To-Earth with the Three-Position Switch194
- Operating the Three-Position Switch with Motor-Operating Mechanism195
- Protection Tripping of the Switch-Fuse Combination195
- Emergency Operation of the Three-Position Switch with Slow Motion Mechanism (900 MM Panel Width)196
22 Work-In-Progress Earthing201
- LRM Plug-In Sockets203
23 Verification of Safe Isolation from Supply203
- VOIS and CAPDIS Indications205
- WEGA Indications207
24 Replacing HV HRC Fuse-Links208
- Disconnecting the Feeder Voltage Transformer212
25 Operating the Feeder Voltage Transformer212
- Connecting the Feeder Voltage Transformer213
- Operating Circuit-Breaker Panels (600 MM Panel Width)214
26 Short Instructions214
- Operating Circuit Breaker Panels (900 MM Panel Width)220
- Operating Vacuum Contactor Panels226
- Operating Switch-Disconnector, Disconnector, Ring-Main and Metering Panels with 600 MM Panel Width230
- Operating Disconnector Panels as of 2000 a (900 MM Panel Width)234
- Operating Bus Sectionalizer Panels with 600 MM Panel Width238
- Operating Bus Sectionalizer Panels with 900 MM Panel Width242
- Operating Bus Sectionalizer Panels with Two Three-Position Disconnectors and with 600 MM Panel Width246
- Operating Bus Sectionalizer Panels with Two Three-Position Disconnectors and with 900 MM Panel Width253
- 26.10 Operating the Circuit-Breaker Panel with Busbar Earthing Switch261
27 Cable Testing266
28 Maintenance268
- Maintenance of Circuit-Breaker 3AH25 with 30000 Operating Cycles268
- Service Information268
29 Checks and Maintenance Work in Case of Special Operating Conditions275
- Visual Check at the Operating Mechanisms and the Three-Position Switches276
- Visual Check of Spring-Operated Mechanism276
- Visual Check of Slow Motion Mechanism278
- Visual Check of Spring-Operated/Stored-Energy Mechanism279
- Visual Check of Circuit-Breaker Operating Mechanism281
- Visual Check of Vacuum Contactor Operating Mechanism282
- Cleaning, Greasing and Lubricating the Operating Mechanisms283
- Test Operation of the Operating Mechanisms283
30 Permissible Lubricants284
- (Motor Control Unit - Module Housing)285
- Annex285
- Application285
- Design, Function285
- Extract from the Technical Description285
31 Extending the Switchgear or Replacing Panels and Components284
32 Mcu-Mh285
- Fault Signals286
- Technical Data286
- Terminal Assignment of Motor Control Unit287
- Siemens Service Hotline288
- Index289

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Siemens NXPLUS C Specifications

General

Rated voltage	Up to 24 kV
Rated frequency	50/60 Hz
Protection degree	IP4X
Insulation medium	SF6
Standards	IEC 62271-200
Operating mechanism	Spring-operated

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