SACE Tmax MCCB

Check the data sheet, or contact the support at ABB....

http://www.abb.us/product/seitp329/b33882d222a164a4c1257a9b0036a400.aspx

What he says and you could always install a lamp, or rotating light that switches on when the MCCB trips.

Appears that the bigger one with the motor is an ACB (Sace Emax) This is a stored-energy mechanism. The CB cannot be 'switched off' by handle movement or anything like that, it can only be tripped. The Tmax CBs are MCCBs which have a spring-assisted mechanism, not a stored-energy one. They can be switched off using the handle, and if course, can be tripped by delatching.

<...visually possible to see the overcurrent release trip position from a far distance...>

Yep. All the lights have gone out over there, and someone is on the phone moaning about it.

<...a power proportional to the current rating ...>

That statement is meaningless other than being a definition of voltage.

so you say all the low voltage c.b can be manually made on/off regardless of current rating...

Isn't that what a circuit breaker does?

No , I meant the force needed to operate the c.b manually is regardless of current ?

What does it say in the equipment datasheet?

What did the manufacturer say over the telephone?

Question 1

Most breakers have 3 positions of ON, OFF or intermediate TRIP states.

If you want to monitor visual status of Breaker, please provide panel mounted indication lamps wired to inbuilt auxiliary contacts (available with manufacturer as accessories). You have contact blocks through which you can monitor ON/OFF/TRIP status of the Breaker.

You are right in saying that you cannot differentiate trip with inbuilt protection and remote tripping. However when you are switching OFF manually, the breaker will not come to intermediate trip position but will move to OFF position only.

Please note in the breaker you have shown, you can read the status of breaker on the front LCD display unit itself.

Question 2

If you are having manual operated Breakers, you can get front operated rotary drive mechanism to derive the mechanical advantage to switch ON or OFF the breaker. These are available as accessories with the breaker manufacturer. Higher capacity breakers will require front rotary drive to comfortably switch ON or OFF the breakers.

Other option is to have electrical operated closing and tripping mechanism inbuilt in the breaker to control the breaker operation.

Which upper led there is a whole row of them,

Check the suppliers documentation

http://www02.abb.com/global/huabb/huabb008.nsf/0/a5fdf8e2a684f1d5c1257a2c0046dcec/$file/Emax_l%C3%A9gmegszak%C3%ADt%C3%B3k.pdf

With respect to the SACE PR121/P unit as per your attachment there are 4 LEDS, one for each protection element of IDMT(L), short circuit with definite time delay(S), instantaneous short circuit(I) & ground fault(G). Each of the LSIG element is provided with one indicator with "L" element LED being the top most. As per ABB catalogue, the LED will be activated for the following conditions: • a protection is timing. For protection L the prealarm status is also shown; • a protection has tripped (the corresponding LED is activated by pressing the "Info/Test" pushbutton); • a failure in connection of a current sensor or in the opening solenoid is detected. • wrong rating plug for the circuit-breaker. Please note the LED will be ON as watch dog signal if the unit is healthy and in circuit. It will start to blink only under any one of the above condition. This is my understanding of the reading of the catalogue. However please consult local ABB technical person for confirmation.

no, as far as I know in healthy conditions this leds will be off.