EXN three phase low voltage dry type distribution transformers from Square D comply with DOE energy conservation standards and Natural Resources Canada (NRCan) minimum energy efficiency levels. This transformer is a 75kVA, 480V primary (three wire), 208Y/120V secondary (four wire) with copper windings with a 220 insulation system design for 150 degree C temperature rise. This transformer’s DOE 2016 and NRCan efficiency is a minimum of 98.60% at 35% loading and 75°C temperature. Terminals are designed to accommodate wire ranges sized for 125% of the secondary nameplate current and 250% of the primary nameplate current. The terminals allow for NEMA two hole lugs and wiring bending radius to align with the wire ranges and to allow for side and bottom access. Units are natural air cooled with exhaust vents located on the front only, allowing the transformers to be mounted with rear clearance to obstructions of ½ inch. Units are shipped as Type 2 for indoor installation, field convertible to Type 3R via weathershield for outdoor installation. The transformers are floor mounted but field accessories are available for wall or trapeze (ceiling) mounting. EX transformers have a low sound level, with a minimum of 3dB below NEMA Standard ST-20 requirements. Units are specifically designed to function with other Square D equipment; inrush is coordinated to meet identified breaker trip curves, and IZ levels allow for let through current to match AIR levels of panelboards. See product data sheets for these values.
- Range of Product : Square D
- Product or Component Type : Transformer
- Device short name : DOE 2016
- Transformer type : Energy efficient
- Device Application : Low voltage electrical distribution
- Box number : 20M
- Phase : 3 phase
- Rated operational power in VA : 75 kVA
- Network Frequency : 60 Hz
- Type of cooling : Natural convection
- Primary Voltage : 480 V delta
- Number of tap-offs : 2 2.5 % FCAN, 4 2.5 % FCBN
- Primary operational current : 90.21 A 208.18 A 75 kVA
- Secondary voltage : 208Y/120 V
- Coil Material : Copper
- Basic IMP level (BIL) : 10 kV
- Temperature Rise : 150 °C, 220 °C insulated
- DOE Efficiency : 98.66 % at 35 % load factor , 167 °F (75.0 °C)
- Sound Level : 47 dB, 6 dB NEMA ST-20
- %IZ : 5.56 %
- %IX : 4.84 %
- X/R Ratio : 1.76
- Inrush current : 733 A
- Let Through Current : 4.17 kA
- Transformer Losses : 142 no load (core loss), 2308 load loss (coil loss)
- Transformer BTU/HR : 645 16.6 %, 919 25 %, 2395 50 %, 4856 75 %, 8302 100 %
- Height : 33.50 in (851 mm)
- Depth : 27.44 in (697 mm)
- Width : 30.08 in (764 mm)
- Net Weight : 660.99 lb(US) (299.82 kg)
- Degree of protection : UL type 2, UL type 3R, with 7400WS18M19M20M
- Number of mounting holes : 4 Ø: 0.51 in (13 mm)
- Ambient Air Temperature for Operation : 104 °F (40 °C)
- average ambient air temperature for operation : 30 °C
- Standards : UL 1561, CSA C22.2 No 47, NEMA ST-20
- Category : US1PE2X16256
- Discount Schedule : PE2X
- GTIN : 785901830863
- Returnability : Yes
- Country of origin : MX
- Unit Type of Package 1 : PCE
- Number of Units in Package 1 : 1
- Package 1 Height : 38.50 in (97.79 cm)
- Package 1 Width : 35.00 in (88.9 cm)
- Package 1 Length : 32.00 in (81.28 cm)
- Package 1 Weight : 755.00 lb(US) (342.462 kg)