Description
Cutler-Hammer Motor Drive Isolation Transformer, Type MD Dry Ventilated, 230 VAC Primary, 230Y/133 V AC Secondary, 51 kVA Power, 60 Hz Frequency, 3 ph ph, 2 Taps, Screw Mounting, NEMA 2/3R Enclosure, 150 deg C, 26-1/8 in L x 19-1/8 in W x 39-3/8 in H Dimensions
Features:
- Short-term overload capability as required by ANSI
- Primary and secondary terminals are front accessible for fast and easy connection
- Slotted screw mounting holes in enclosure and cover reduce installation time
- Sound dampening pads, which isolate the core and coil from the case, reduce noise levels to meet NEMA ST-20
- Core laminations of precision sheared silicon steel are hand stacked to ensure quiet operation
- Terminations are clearly marked for easy identification
- Three-phase transformers have one 5% full capacity tap above and below nominal voltage for incoming source adjustment
- Units are suitable for continuous operation in a 40 deg C ambient maximum
- Full current neutral
- Thermoguard protection embedded in coils of three phase models to indicate that high temperatures (approximately 190 deg C) are present and thermoguards consist of a set of NO dry contacts
- Three coil delta-wye configurations are used throughout the product line
- 150 deg C rise standard (self extinguishing), 115 deg C or 80 deg C rise optional
- Drive isolation transformers are specifically sized to the drive kVA requirements and are braced to withstand the mechanical stresses of current reversals and short circuits associated with SCR drives
- Electrical isolation between the incoming line and the drive circuitry
- Voltage conversion of input line to standard drive input voltages
- Minimized line disturbances caused by SCR (silicon controlled rectifiers) firing
- Reduced short-circuit currents and voltage line transients
- DT-3 design
- Aluminum coil
- 1 at +5% FCAN, 1 at -5% FCBN tap
Applications:
Indoor and Outdoor Applications
Standards/Approval:
- UL 506
- 1561
- ANSI C89.2
- NEMA ST-20
