52 lines
995 B
Python
52 lines
995 B
Python
#!/usr/bin/python
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import sys
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cabletype = sys.argv[1]
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voltage_limit = 11.5
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cable_size = {
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"13": 1.5,
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"16": 2.5,
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"32": 6.0,
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"63": 16,
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"125": 35,
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}
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single_phase = {
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1.5: 31,
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2.5: 19,
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6.0: 7.9,
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16: 2.9,
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}
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three_phase = {
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1.5: 27,
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2.5: 16,
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6.0: 6.8,
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16: 2.5,
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35: 1.1,
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}
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drop = 0
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if "/3" in cabletype:
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drop = three_phase[cable_size[cabletype[:-2]]]
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else:
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drop = single_phase[cable_size[cabletype]]
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print(f"Voltage Drop (per ampere per metre): {drop}mV/A/m")
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assumed_load = float(sys.argv[2])
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length = int(sys.argv[3])
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total_drop = drop * assumed_load * length / 1000
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print(f"Total drop at {assumed_load}A over {length}m is: {total_drop:.1f}V")
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if total_drop > voltage_limit:
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print("FAILED: VOLTAGE DROP TOO HIGH")
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max_length = (voltage_limit * 1000) / (drop * assumed_load)
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print(f"Maximum length of cable at this load: {int(max_length)}m")
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r = total_drop / assumed_load
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pfc = 230 / r
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print(f"Estimated PFC is {pfc:.1f}A")
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