Attachment_3_Drawings_and_Document_6581593-100_Certified_Drawings.pdf
PDF 992 KB Posted
- Attached to
- 138 KV Oil Breaker Replacements Project
- Solicitation number
- RFP-2024-010
- Issued by
- Alachua County, Graceville City, Florida
About this file
The provided document is a set of certified Siemens Energy technical drawings and specifications for a 138 kV circuit breaker replacement project for Gainesville Regional Utilities (GRU) in Florida. The drawings include detailed schematics for gas systems, operator nameplates, current transformers, sulfur hexafluoride circuit breakers, porcelain outlines, and elementary electrical diagrams. These technical documents support GRU's multi-year initiative to replace existing 138 kV oil circuit breakers with new 138 kV SF6 breakers, with plans to replace 4-6 breakers annually.
The project scope encompasses comprehensive engineering design, procurement of materials (except for the SF6 breakers, which GRU will provide), modification of existing breaker foundations, conduit adjustments, control cable replacement, removal and disposal of old oil circuit breakers, and installation of new SF6 breakers. The technical specifications provide intricate details on equipment ratings, including voltage ranges, current capacities, operating pressures, and mechanical specifications. The drawings are dated September 1, 2017, and are marked as confidential, indicating a structured and methodical approach to the utility infrastructure upgrade with precise technical requirements for the replacement process.
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Text version
STANDARD: IEEE C57.13
TYPE: BUSHING CURRENT TRANSFORMER
INSULATION LEVEL: 0.6kV CLASS
TEMPERATURE CLASS: 105° C.
FREQUENCY: 60 HZ
MAXIMUM RATIO: 2000 : 5
TOTAL SECONDARY TURNS:
SECONDARY RESISTANCE @ 75° C: ( 1.015 full winding w/ leads ) OHMS/TURN
ACCURACY CLASS:
CONTINUOUS THERMAL RATING FACTOR: TIMES RATED @ ALL TAPS
THERMAL RATING @ 1 SECOND: ( 75.1 times nominal ratio ) kA RMS SYM. @ FULL RATIO
THERMAL RATING @ 3 SECONDS: ( 43.6 times nominal ratio ) kA RMS SYM. @ FULL RATIO
MECHANICAL / DYNAMIC RATING: ( 202.8 times nominal ratio ) kA PEAK MAXIMUM
TURNS CONNECTION
300 : 5 60 X3-X4
400 : 5 80 X1-X2
500 : 5 100 X4-X5
800 : 5 160 X2-X3
1100 : 5 220 X2-X4
1200 : 5 240 X1-X3
1500 : 5 300 X1-X4
1600 : 5 320 X2-X5
2000 : 5 400 X1-X5
REV. DATE
TYPICAL OVER-CURRENT RCF CURVES BURDEN: 8.0 OHMS
drawn for: drawn for: drawn for: drawn for:
TYPICAL SECONDARY EXCITATION CURVES
CURVE REVISION HISTORY
09T-034-501
SIEMENS
72-281-927-003
Drawing Design Number
TYPICAL PHASE ANGLE CURVES BURDEN: 1.8 OHMS
07/06/10 TYPICAL CHARACTERISTIC
CURVES
drawn by: drawn by: drawn by: drawn by:
REV. 00
DESIGN PARAMETERS
C800 & 0.3B1.8 @ 2000:5
2.0
150.2
405.5
0.00254
RATIODESIGN NOTES
checked by: checked by: checked by: checked by:
87.1
TYPICAL RATIO CORRECTION FACTOR CURVES BURDEN: 1.8 OHMS
07/06/10 part number: part number: part number: part number:
10 100 1000 10000
Percent Rated Current
Dashed Line - Secondary Coordinate Solid Line - Primary Coordinate
R a ti o
C o rr e c ti o n
F a c to r
1.1
1.01
1.001
1.0001
10000
Secondary Exciting Amperes-Ie, (RMS)
S e c o n d a ry
E x c it in g
V o lt a g e
E s
(R M
S
1 2.5 5 10 20 50 100 200
Percent Rated Current
P h a s e A n g le
M in u te s
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.01 0.1 1 10 1000.001
1.0000
1.0010
1.0020
1.0030
1.0040
1.0050
1.0060
1.0070
1.0080
1 2.5 5 10 20 50 100 200
Percent Rated Current
R a ti o
C o rr e c ti o n
F a c to r 2000
0.0
0.0
0.0
0.0
0.0
0.0
0.0
LEGEND
LEGEND
The dashed (---) line represents the knee point (Ek) the point tangent to the curve at 45° to the exciting current Ie.
TOLERANCE OF CURVE VALUE:
To the right of this line at any current Ie the voltage Es cannot be <95%
To the left of this line at any voltage Es the current Ie cannot be >125%
LEGEND
LEGEND
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