MV Standard Levels
MV Standard Levels
(OP)
Greeting to All,
For a new industrial power distribution system, we have been provided with two options for voltage levels, and we want to select the levels that will not case issues in future in regard of equipment selection (like Transformers, CB's, SVC's, motors, ...etc.)
The provided voltage level options are as follow:
-Option-1: 33kV, 13.8kV & 3.3kV
-Option-2: 34.5kV, 13.8kV & 4.16kV
Questions:
1) I need to know the proper option out of the above.
2) Is there any standards controlling the MV level selection, and based on that, most of equipment manufacturer will comply.
Thx., and appreciate your support.
For a new industrial power distribution system, we have been provided with two options for voltage levels, and we want to select the levels that will not case issues in future in regard of equipment selection (like Transformers, CB's, SVC's, motors, ...etc.)
The provided voltage level options are as follow:
-Option-1: 33kV, 13.8kV & 3.3kV
-Option-2: 34.5kV, 13.8kV & 4.16kV
Questions:
1) I need to know the proper option out of the above.
2) Is there any standards controlling the MV level selection, and based on that, most of equipment manufacturer will comply.
Thx., and appreciate your support.






RE: MV Standard Levels
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If we learn from our mistakes I'm getting a great education!
RE: MV Standard Levels
I've worked at facilities that had a mish-mash of American and European gear. Every time I opened a cabinet or a drawing, I had to make a point of remembering WHO made the stuff. don't just make it easy on yourself, think of those who come behind you to operate and maintain the stuff.
old field guy
RE: MV Standard Levels
For IEC world, the relevant standard is IEC 60038 ed7.0 (2009-06) IEC Standard voltages.There are two other standards on the subject viz IEC 60850ed3.0(2007-02)Railway Applications -Supply Voltages of Traction Systems and IEC 60449 ed1.0(1973) Voltage bands for electrical installations of buildings.
RE: MV Standard Levels
The plant will be in United Arab Emirate(UAE), and majority of equipment will be from Europ, Japan, and Asia with 60hz power system.
I want to avoid the issue that has been highlighted by Mr. oldfieldguy, thus, we are looking for standardization, and we don't want to have a range of equipment that may have limited support due to uncommon requirement, or may have a high cost for spare/support due to out of common manufactured range.
RE: MV Standard Levels
The 60Hz world is dominated by North American suppliers, so align your voltages with their standards. I'm dipping out of this discussion because 60Hz isn't my thing...
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If we learn from our mistakes I'm getting a great education!
RE: MV Standard Levels
RE: MV Standard Levels
RE: MV Standard Levels
1- there is no external restriction (utility of your system)
2- 50Hz-CB was approved in Routine tests
3- Type tests for 50Hz-CB were approved by same unsuspect Laboratory Electrical Institute of 60Hz-CB, except one.
4- that one (operationn with capacitor bank) were not applied in our system.
RE: MV Standard Levels
MV level in the UAE is included 22kV too, imho
RE: MV Standard Levels
Many thanks for your help. I have gone through ANSI C84.1-2006 & IEC 60038 ed7.0 (2009-06) and both were very helpful in addition to your above valuable comments.