Pleae advise on the easiest connection cables and comms set up of the following.
Software is RS Logix 500 V5.20.00, RS Linx, PanelBuilder 32 V 3.80.00.
PC is old, runs on win ME with a 9pin RS232 port.
PLC is one year old Micrologix 1200.
I need to connect a AB 550T HMI to the PLC and also...
Hi,
Can anyone tell me if there is a minimum allowable cable distance from the LV output terminals of a MV/LV transformer, say 1MVA, 11kV/433V to the CB, and what regulations/standards will apply in the UK.
Thankyou.
Old Relay.circa 1970's
Can anyone tell the time a Reyrolle 3B3 relay takes to trip.
The relay is set up as a REF. Instantaneous.
Set for 15V (0.5A) sec current from CT (1200/5)
30ohm resis in parallel with relay.
ie what is defined as "instantaneous" in this case, or is there a curve somewhere...
Hi,
An earlier thread (238-118313) shows a Generator withstand curve according to NEMA MG1-16.45
Is there an equivalent curve under IEC / BS / European standards, and if so could someone direct me to it or post it on this site.
Is there a minimum recommended time that standby low voltage (400V -...
Hi,
System
PLC -- SLC 5/03
HMI -- Panelview 550
Connected cables
From SLC 5/03 Serial Port to PV 550 Serial Port (RS232)
From PC Serial Port via 1747 PIC to SLC 5/03 DH485 port.
Software (old but usually works ok, have not had any problems before using it)
RSLogix 500 V5.20.00
Linx Lite...
Hi,
I am having some difficulty with the following, any input is gratefully received.
System
AB SLC 5/03.
1746 - HSCE Card for encoder 1024ppr encoder input.
1746 - N104V 2channel analogue input/output card.
Drive roller dia = 100mm (~4inch)
The encoder is mounted on the motor shaft.
The motor -...
Hi,
System
AB SLC 5/03.
1746 - HSCE Card for encoder 1024ppr encoder input.
1746 - N104V 2channel analogue input/output card.
Drive roller dia = 100mm (~4inch)
The machine drive roller pulls material through the machine at about 10m/min
I need to measure the speed of the machine via the encoder...
Hi,
I have been asked to modify a machine as follows.
On site there is a SLC 5/02 plc (1996), with spare slots.
I am using RS logix 500 V5.20 software. I know its a bit old but it works.
I have been asked to add the 1746HSCE card and connect an AB 845 diff encoder.
This is to measure the...
Hi,
Installation approx 50years old.
Low voltage 230/400V.(UK).
0.5sq in (~300mm2)4core PILC cable.
Cables/Gland Boxes located inside switchroom.
Problem
The black pitch/compound that is used to 'pot' the end of the cable into the cable gland/termination box is leaching / leaking out, and...
Higuys,
I have an existing AB 5/02 plc on an existing machine.
I have been asked to modify the machine so that it can determine the position of a product coming down the line.
Currently this is done by a proxy detecting a stud on a gear wheel.
It needs to be more accurate.
I propose to insert a...
On low voltage systems, (UK 400V, 3ph+N ) and using Single core/Copper conductor/Aluminuim outer cables, 2per phase.
What is the standard practice for glanding off the Alum' armour ie..
a. Gland,terminate and bond both ends to earth, and use Al armour as earth return. or..
b. Gland, terminate...
Hi,
I have a problem with a KTK 6P4Q7.5 Drive.
The drive is 3phase 415V 50Hz input. (UK).
Fitted to a Bridgeport Interact 4 miller.
Drives the Spindle motor.
Initially the machine / drive lost a phase (faulty 3ph switch).
Replaced switch.
3phase ok to drive card, and all other start/enable...
I would be grateful if anyone could point me to any web-sites that have useful information / practical guides to pri and sec injection testing of Ct and relay systems.
Many thanks.
Hi all,
Although I have used several plc programs in the past, I am having a problem with GXdeveloper. This is the first time I have used it.
Q. When I program a few lines in ladder logic, then try to either save, verify, compile etc the software comes back with a message asking me if I want to...
Hi,
Your answers/response to the following would be appreciated.
Consider a typical transformer 13kV / 0.415kV rated at 750kVA.
The HV side protection device is operated by the LV protection relay that is monitoring Over-current and un-restricted Earth Fault current.
The loading is a mixture...
Hi guys,
Two questions.
1. What happens to the CT, its' wiring, and connected protective device etc.. if a CT is driven into saturation from a high short circuit current ?.
2. Is it necessary for a set of CT's selected for REF protection ( low setting say 0.2In ) to have a knee point voltage...
Hi,
please help resolve the following discussion.
What value of rms sym fault current do you use when attempting to determine the settings of a downstream protective device (ie an mccb)when the supply is from a generator?.
Do you use either the sub-transient, the transient or the steady state...
Hi,
please help resolve the following discussion.
What value of rms sym fault current do you use when attempting to determine the settings of a downstream protective device (ie an mccb)when the supply is from a generator?.
Do you use either the sub-transient, the transient or the steady state...
