Specification T1689 Technical Manual Rev 07
Fan/Contactor Supply Transformer MV3000 Air Cooled DELTA
Page 68
2.14 FAN/CONTACTOR SUPPLY TRANSFORMER
2.14.1 Standard MV DELTA Cooling System
The transformer outputs are for the MV DELTA Cooling System at 230 V, single phase a.c. and the pre-charge
contactor supply at 110 Va.c.
2.14.1.1 Transformer Details
The fan and contactor supplies (MV DELTA Cooling System) are isolated from the primary of the transformer.
Maximum Number
of Fan Boxes
a) Primary Fuse
(IEC) Type gG
b) Primary Fuse
(UL/CSA) Type J
Fan Supply Rating
(@230 Va.c. 50Hz)
Contactor Supply
(@110 Va.c.)
Table 2-35. – Electrical Specification for Supply Inputs & Outputs
NOTES:
Supply Voltage (MV3FTXxxxxA4) : 380/415/440/480 V (Selected by tap changes)
(MV3FTXxxxxA6) : 500/525/600/660/690 V (Selected by tap changes)
Supply Tolerance : ±10% from nominal, +15% for 0.5 to 30 cycles to
IEC 60146-1-1
Nominal Supply Frequency : 50 Hz/60 Hz
Frequency Variations : 45 - 63 Hz
Terminations : Screw Terminal Block to accept 0.5 - 2.5 mm²
(20 - 14 AWG) cable
NOTE: Use a consolidated crimp for smaller sized
wires.
Insulation Test Voltage : 3.0 kV between primary and secondary
(a.c. rms for 1 minute) : 3.0 kV between windings and case earth/ground
Further insulation tests at these voltages may degrade the insulation barriers. Customers should NOT repeat
this level of testing.
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