Poor application of product. PD may or may not reveal poor workmanship; however, other dielectric testing such as tan delta evolution may have revealed any treeing or paths to ground throught the dieletic prior to energization. The preperation of the cable for the installation of the splice is...
I did one a while back - the purpose of the wall was not rated for hte blast but to be "fire rated" and therfore be able to contain the oil from the transformer from splashin on the protected area. We used a cinder block construction - I have not found any reference to any standard which makes...
-IEEE Red Book.
-IEEE Buff Book.
-T&D Reference Book (Westinghouse) - Hard to find book but a great reference that everyone in the power industry should have.
Ha. Yeah I know. I didn't do this installtion or design, however I have to interface some NEW equipment with it. Some housekeeping is definetly in order here.
I'm not a PLC expert. Any idea who makes the unit in the subject line? Schneider perhaps? I am looking for an operator/installation manual for the unit as i want to bring back a couple of 4-20mA flowmeter outputs to the unit, and i want to know what the unit's capabilities are. Plus I need to...
waross:
Am I correct in assuming:
1) The engine is building up slow.
2) Since this is happening there is little voltage on the stator therefore the contacts on K1 relay (terminal 1,7 and 9,3) stay "in" keeping the SCR fired.
3) Since the frequency is down (inductor impedance is frequency...
The connected load is approximately 52kW, however my client did a measurement at one point in time to see what the load was and he measured about 30A (~31kW).
They have gave me no indication of shaft vibrations or that the unit is running hotter than normal.
The problem seems to happen when...
My client has already replaced the fuel pump and injectors (on his own accord) on the unit, but it has seen little impreovement in performance. I definetly see some problems on the mechanical side; however, should this relay be burning up because of this?
I have a client with a 100kW, 600VAC, Caterpillar SRCR generator set that they are having some problems with. I don't have much information on the unit only a wiring diagram that I have attached. Through a telephone conversation with my client I have gathered the following details on what is...
I am looking for a single pole double throw electromechanical relay for:
Class 1, Zone 1, Gas Group IIC OR IIB+H2, Temp Code at least T3.
It needs a 120V coil.
Contacts rated at at least 120V and 8A.
Does anyone know of a reference guide the busbar inductance calculations. I have a guide for tubular (circular hollow bus bar) but not for solid rectangular bus bar. I cannot seem to dig up anything online regarding this type of calculation. Is there an IEEE or Mfg. reference that covers this?
I'm a designing a lighting system for council chambers at a city hall. The council chambers are to have several TV cameras to broadcast council proceeding on the local community channel. Can someone point me in the direction that I should proceed on this design (as I am not a lighting...
guys:
thanks for the discussion/brainstorming on this.
dpc/Eleceng01 you points are noted; however, the point that I was actually trying to make was caught by Timesabroom. thanks guys, i appreciate all the constructive commentary. i just wanted to see what other peoples views/opinions are on...
Eleceng01:
Am I understanding you correctly in saying that in order for the switchgear to be arc resistant the fault in it must be cleared w/in 0.5 seconds? (I've seen several applications where this is not the case and sometimes there was not simple resoution to managing the FCT).
Switchgear...
What does arc resistant switchgear do with respect to mitigating arc flash hazards? I know, qualitatively it reduces the risk an an arc flash incident, but how may this be quantified with respect to calculating arc flash hazards?
For instance, if I have a switgear lineup that has an arc flash...
