IEEE 841
IEEE 841
(OP)
Hi Guys,
Is their a IEE 841 Motor specification for motors above 500 hp and 4160 volts. I'm aware of IEE 841 for 500 hp no ventilated motors upto 4160 volts. The reason for asking is the client is asking for a WPII machine 4kv 575hp according to IEE 841 ? Can you guys advise me. Thanks
Is their a IEE 841 Motor specification for motors above 500 hp and 4160 volts. I'm aware of IEE 841 for 500 hp no ventilated motors upto 4160 volts. The reason for asking is the client is asking for a WPII machine 4kv 575hp according to IEE 841 ? Can you guys advise me. Thanks





RE: IEEE 841
RE: IEEE 841
A short IEEE 841 Standard:
Electrical
designed to meet NEMA MG-1, MG-13 and IEEE 841
90°C rise by resistance method at 1.15 S.F. (or 80°C rise by resistance method at 1.00 S.F.)
motors between 2300V and 4160V use VPI form windings that withstand a surge of 3.5 per unit voltage at a rise time of 0.1 – 0.2ms and 5 per unit voltage at a rise time of 1.2ms or longer
1.15 Service Factor rating
rated for ambient temperature from -25°C to +40°C
3 Leads c/w solderless lug terminals
copper cage rotor construction
NEMA Design B as defined in section 1.17.1.2 of NEMA MG 1-1993
have a nonhygroscopic, chemical and humidity resistant class F insulation system
Mechanical
IP54 rated enclosure
IP55 rated main conduit box with twice the volume specified in NEMA
IP55 rated bearing protection (320T frame and larger)
all ratings are designed for bi-directional rotation
cast iron frame, brackets, hoods and conduit box
frame provided with two (2) threaded drain holes c/w drain plugs and tapped hole on foot for ground lug
foot flatness and shaft runout meet or exceed IEEE 841
automatic corrosion-resistant, replaceable drain plugs
exterior paint consists of one (1) coat zinc chromate epoxy primer and (1) coat of dark blue paint
F-1/F-2 interchangeability
non-sparking plastic or bronze fan
noise level not to exceed 90dB "A"
dynamically balanced rotor designed not to exceed 0.08 inches/second
regreasable bearings with an AFBMA C3 clearance and they are supplied with a rust-inhibiting grease which provides a minimum L-10 life of 30,000 hrs
bearing temperature rise of 50°C for all 2 pole motors and 45°C for all 4 and 6 pole motors.
Regards
PETRONILA
RE: IEEE 841
Good summary petronilla. What is MG13?
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RE: IEEE 841
There is an overlap in application between the two standards; however there is also an overlap in the Technical Committees. I count at least seven people who are active on both committees.
RE: IEEE 841
The MG-13 Belongs to MG1-1998 and is the Standard Frame Assignments for alternating current Integral- Horsepower induction motors.
Regards
Petronila