Combing MCCB with Manual Motor Controller?
Combing MCCB with Manual Motor Controller?
(OP)
Hello everyone,
I am looking for a manual motor starter combined with a circuit breaker in one package.
As an example, Sprecher+schuh have a model KTA7 that they claim has all the functionality of a typical MCCB, Contactor & Overload combination all-in-one package. I've never seen this before and I find it hard to believe, but I'm wondering if anyone has used one of these before. Automation Direct also sells another example (made by Fuji).
I need to meet UL/CSA standards also.
Any experience with these types of motor controllers would be greatly appreciated.
Thanks.
I am looking for a manual motor starter combined with a circuit breaker in one package.
As an example, Sprecher+schuh have a model KTA7 that they claim has all the functionality of a typical MCCB, Contactor & Overload combination all-in-one package. I've never seen this before and I find it hard to believe, but I'm wondering if anyone has used one of these before. Automation Direct also sells another example (made by Fuji).
I need to meet UL/CSA standards also.
Any experience with these types of motor controllers would be greatly appreciated.
Thanks.





RE: Combing MCCB with Manual Motor Controller?
RE: Combing MCCB with Manual Motor Controller?
RE: Combing MCCB with Manual Motor Controller?
RE: Combing MCCB with Manual Motor Controller?
"Venditori de oleum-vipera non vigere excordis populi"
RE: Combing MCCB with Manual Motor Controller?
MCCB has both elements, overload (thermal or electronic) and short circuit (magnetic or instantaneous) which when meetig requirement of a motor protection per NEC, can be used as a manual starter. (in USA)
Also in the USA there are manual starters with thermal overload protection with or without pilot lights are available, which is essentially a MCCB with a light.
jraef:
Unless we are talking about two different items, I beleive MCP or moldes case switches havemagnetic trip only but does not have thermal trip unit (overload). The magnetic trip is the short circuit protection. Overload is protected by separate O/L relay in starters.
MCP or molded case switches can not be used alone as a motor protector, you need separate thermal overload protection, hence they are only used in combination motor controllers.
macmckim: What you are suggesting will only work if the service size is not more than 250% (in most cases) of the motor FLA.
RE: Combing MCCB with Manual Motor Controller?
The point I was making was that although they can be used per IEC as both the short circuit device and the thermal OL device, here in the US SCPDs must be either fuses, or UL489 circuit breakers. Since these devices are neither, accommodation was made for them in UL as manual motor starters, but they still need to be backed up by a listed circuit breaker or fuses.
"Venditori de oleum-vipera non vigere excordis populi"
RE: Combing MCCB with Manual Motor Controller?
We are talking about two different things as we both are correct.
What you are talking about this is on this link:
http://www.bihplat.com/english/seguridad/
What I am talking about is this link:
ht
If my link truncates, its a squared.com site , and go to prdcuts and look up combination starters with circuit breakers, which also discusses MCP.
RE: Combing MCCB with Manual Motor Controller?
Please check Siemens website.
L&T (India) also has similar devices for small range motors in their range.
RE: Combing MCCB with Manual Motor Controller?
Never mind...
RE: Combing MCCB with Manual Motor Controller?
If anyone is interested, the application guide written by Sprecher+schuh is an excellent read on this subject. It can be found on their website under library-catalogs-section F-page F77 to F82.
Thanks,