Added transformer shortcircuit let-though calc.

jepl/Tables/CEC-Tables/CEC21-table1.csv

@@ -1,28 +0,0 @@
-size,60,75,90
-14,25,30,35
-12,30,35,40
-10,40,50,55
-8,60,70,80
-6,80,95,105
-4,105,125,140
-3,120,145,165
-2,140,170,190
-1,165,195,220
-1/0,195,230,260
-2/0,220,265,300
-3/0,260,310,350
-4/0,300,360,405
-250,340,405,455
-300,370,445,500
-350,425,505,570
-400,455,545,615
-500,520,620,700
-600,580,690,780
-700,630,755,850
-750,655,785,885
-800,680,815,920
-1000,785,870,980
-1250,890,1065,1200
-1500,985,1175,1325
-1750,1070,1280,1445
-2000,1160,1385,1560

jepl/Tables/CEC-Tables/CEC21-table16.csv

@@ -1,20 +0,0 @@
-current,copper wire,copper bus,aluminum wire,aluminum bus
-20,14,2,12,3.5
-30,12,3.5,10,5.5
-60,10,5.5,8,8.5
-100,8,8.5,6,10.5
-200,6,10.5,4,21
-300,4,21,2,26.5
-400,3,26.5,1,33.5
-500,2,33.5,1/0,42.5
-600,1,42.5,2/0,53.5
-800,1/0,53.5,3/0,67.5
-1000,2/0,67.5,4/0,84
-1200,3/0,84,250,127
-1600,4/0,107,350,177.5
-2000,250,127.5,400,203
-2500,350,177.5,500,253.5
-3000,400,203,600,355
-4000,500,253.5,800,405.5
-5000,700,355,1000,507
-6000,800,405.5,1250,633.5

jepl/Tables/CEC-Tables/CEC21-table2.csv

@@ -1,29 +0,0 @@
-size,60,75,90
-14,15,20,25
-12,20,25,30
-10,30,35,40
-8,40,50,55
-6,40,50,55
-4,70,85,95
-3,85,100,115
-2,95,115,130
-1,110,130,145
-1/0,125,150,170
-2/0,145,175,195
-3/0,165,200,225
-4/0,195,230,260
-250,215,255,290
-300,240,285,320
-350,260,310,350
-400,280,335,380
-500,320,380,430
-600,350,420,475
-700,385,460,520
-750,400,475,535
-800,410,490,555
-900,435,520,585
-1000,455,545,615
-1250,495,590,615
-1500,525,625,705
-1750,545,650,735
-2000,555,665,750

jepl/Tables/CEC-Tables/CEC21-table3.csv

@@ -1,27 +0,0 @@
-size,60,75,90
-12,25,30,35
-10,35,40,45
-8,45,55,60
-4,65,75,85
-3,95,115,130
-2,115,135,150
-1,1340,155,175
-1/0,150,180,205
-2/0,175,210,235
-3/0,200,240,270
-4/0,235,280,315
-250,265,315,355
-300,295,350,395
-350,330,395,445
-400,355,425,480
-500,405,485,545
-600,455,545,615
-700,500,595,670
-750,520,620,700
-800,540,645,725
-900,585,700,790
-1000,630,750,845
-1250,715,855,965
-1500,795,950,1070
-1750,880,1050,1185
-2000,965,1150,1295

jepl/Tables/CEC-Tables/CEC21-table4.csv

@@ -1,28 +0,0 @@
-size,60,75,90
-12,15,20,25
-10,25,30,35
-8,35,40,45
-6,40,50,55
-4,55,65,75
-3,65,75,85
-2,75,90,100
-1,85,100,115
-1/0,100,120,165
-2/0,115,165,150
-3/0,160,155,175
-4/0,150,180,205
-250,170,205,230
-300,195,230,260
-350,210,250,280
-400,225,270,305
-500,260,310,350
-600,285,340,385
-700,315,375,425
-750,320,385,435
-800,330,395,445
-900,355,425,480
-1000,375,445,500
-1250,405,485,545
-1500,435,520,585
-1750,455,545,615
-2000,470,560,630

jepl/Tables/CEC-Tables/CEC21-table9.csv

@@ -1,15 +0,0 @@
-Trade Size,RMC,FMC,RPVC,EB1,DB2,LTMC,LTNMC,EMT,ENT,SCH40,SCH80
-12,,71,,,,119,114,,,,
-16,202,198,167,,,196,188,186,167,169,128
-21,354,334,307,,,341,328,330,304,307,246
-27,573,507,507,,,549,527,539,506,507,418
-35,985,792,792,,,965,937,940,894,898,760
-41,1336,1140,1140,,,1257,1257,1288,1230,1233,1054
-53,2199,2027,2027,2027,2027,2068,2098,2132,2057,2057,1796
-63,3139,3167,2951,,,3116,,3783,,2935,2549
-78,4839,4560,4560,4560,4560,4776,,5701,,4553,4002
-91,6458,6207,6138,6138,6138,6207,,7451,,,
-103,8311,8107,7870,7870,7870,8107,,9503,,7895,7023
-129,13039,,12439,12538,12538,,,,,12451,11169
-155,18811,,17613,17613,17613,,,,,18027,16029
-200,,,31225,,,,,,,31303,

jepl/jepl_general.py

@@ -10,11 +10,12 @@ Some General Functions and things
 import pandas as pd
 import numpy as np
 import math
-import sqlite3
+#import sqlite3
 
 
 def va(voltage, current,phases=3):
-    '''Calculate the Volt-Amp of a circuit
+    '''
+        Calculate the Volt-Amp of a circuit
     '''
 
     if phases == 3:
@@ -27,4 +28,23 @@ def va(voltage, current,phases=3):
 
     return va
 
+def xfmr_sc(kva, voltage, impedance, phases = 3):
 
+    '''i
+        Calculate the maximum let-through current of a transformer.
+
+        Isc = resulant short circuit
+        kva = kilo-voltamps
+        impednace in %Z
+
+        Assume 3 phase, but calculate single phase if its selected
+    '''
+    
+    if phases == 1:
+        Isc = (kva * 1000) / (voltage * (impedance / 100))
+
+    else:
+        Isc = (kva * 1000) / (math.sqrt(3) * voltage * (impedance / 100))
+
+
+    return Isc

jepl/jeplinit.py

@@ -1,74 +0,0 @@
-import pandas as pd
-import sys
-import sqlite3
-
-'''
-    When this init file is used for projects, the location should be passed as an argument, similar to:
-
-    %run jeplinit.py resources/JEPL/jepl/ 
-
-    If there is no argument, we assume that it is part of development and we will use the root folder.
-'''
-location = ''
-if sys.argv[1]:
-    location = sys.argv[1] # This needs to be passed if its not the same as the location of jepl.py
-
-
-'''
-    The functions used in the initialization
-'''
-
-def insert(database,table,data):
-    '''
-        This function creates a database from the current 
-        source data to be used in the modules.
-
-        Running this function will replace any data that is already in the database.
-    '''
-
-    conn = sqlite3.connect(database)    
-    data.to_sql(table, conn, if_exists='replace', index=False) 
-    conn.close()
-
-def create_database(name,tables):
-    '''
-        This function loops over the source data lists to create tables in the database.
-    '''
-
-    for i in range(len(tables)):
-        db = tables[i][0]
-        table = tables[i][1]
-        source = tables[i][2]
-        data = pd.read_csv(source)
-
-        insert(db,table,data) # Call the database insert function to add the data
-
-
-'''
-    This is all the tables and their sources that will be added to the databases.
- 
-'''
-
-CEC21_database = [
-                ['jepl-cec21.db','Table1',location+'Tables/CEC-Tables/CEC21-table1.csv'],
-                ['jepl-cec21.db','Table2',location+'Tables/CEC-Tables/CEC21-table2.csv'],
-                ['jepl-cec21.db','Table3',location+'Tables/CEC-Tables/CEC21-table3.csv'],
-                ['jepl-cec21.db','Table4',location+'Tables/CEC-Tables/CEC21-table4.csv'],
-                ['jepl-cec21.db','Table9',location+'Tables/CEC-Tables/CEC21-table9.csv'],
-                ['jepl-cec21.db','Table16',location+'Tables/CEC-Tables/CEC21-table16.csv'],
-                ]
-create_database('jepl-cec21.db',CEC21_database)
-
-Z46215_database = [
-                ['jepl-z46215.db','Table1A',location+'Tables/Z462-Tables/Z46215-table1A.csv'],
-                ['jepl-z46215.db','Table1B',location+'Tables/Z462-Tables/Z46215-table1B.csv'],
-                ]
-create_database('jepl-z46215.db',Z46215_database)
-
-
-cable_database = [
-                ['jepl-cable.db','SW-Spec 25055',location+'Tables/Manufacturer/SW-Spec-25055.csv'],
-                ['jepl-cable.db','SW-Spec 25051',location+'Tables/Manufacturer/SW-Spec-25051.csv'],
-                ]
-create_database('jepl-cable.db',cable_database)
-

tools.py

@@ -30,6 +30,21 @@ def va(args):
 	else:
 		print(args.phases)
 
+def xfmr_sc(args):
+    if args.phases == None:
+        phases = 3
+    elif arg.phases == 1:
+        phases = 1
+    else:
+        phases = 3
+    
+    #print(args.kva)
+    #print(args.voltage)
+    #print(args.impedance)
+
+    result = jmk.xfmr_sc(args.kva, args.voltage, args.impedance, phases = phases)
+    print(result)
+
 
 # Circuits
 
@@ -158,8 +173,6 @@ def voltagedrop(args):
 	else:
 		raceway = True
 	
-
-	
 	if args.temp == None:
 		insul_temp = 75
 	else:
@@ -207,6 +220,15 @@ try:
 	va_parser.set_defaults(func=va)
 
 
+# Calcuating xfmr_sc
+
+	xfmrsc_parser = subparsers.add_parser("xfmr_sc", help="Calculates the secondary short circuit current of a transformer")
+	xfmrsc_parser.add_argument("voltage", type=float,help="Voltage of the circuit")
+	xfmrsc_parser.add_argument("kva", type=float,help="Transformer rating in kVA.")
+	xfmrsc_parser.add_argument("impedance", type=float,help="Transformer impedance in percent Z.")
+	xfmrsc_parser.add_argument("-p","--phases", type=int,help="Phases of the circuit. It should be either 1 or 3, and we will assume 3 if it is not used.")
+	xfmrsc_parser.set_defaults(func=xfmr_sc)
+
 #
 # Circuit Tools
 #