Siemens 3PCI Series, Operation Manual

Page: 21 / 54

3PCI SCR Power Controller Series Manual Options Setup
Version 1.2 (19000325)
s
4-1
CHAPTER 4: OPTIONS SETUP
In This Section:
•
Introduction ................................................... 4-1
•
Option CL (3-phase Current Limit) ................. 4-1
•
Option CID (Current Imbalance Detector) .... 4-1
•
Reset Push-button ........................................ 4-1
•
Adjusting the Overcurrent (OC) Feature....... 4-1
4.1. Introduction
This section describes the setup procedures for the following 3PCI options:
•
Option CL (3-phase current limit) setup
•
Option CID (current imbalance detector) calibration
•
Reset push-button setup (user supplied).
4.2. Option CL (3-phase Current Limit)
Refer to Chapter 3: Operation and review the appropriate setup procedures for the BIAS and GAIN controls.
Then adjust option CL as follows:
1. Adjust the CURRENT LIMIT potentiometer fully CW.
2. Adjust BIAS and GAIN as previously described in Chapter 3: Operation.
3. Adjust the CURRENT LIMIT potentiometer full CCW.
4. Increase the input control signal to demand full output.
5. Adjust the CURRENT LIMIT potentiometer until maximum current level is reached.
4.3. Option CID (Current Imbalance Detector)
A separate box is included if the CID option is specified. For calibration information, refer to data shipped
with the CID option.
4.4. Reset Push-button (User Supplied)
1. Connect a normally-closed (N.C.) push-button switch to
TB2
, terminals 43 and 44.
2. Remove jumper
J2
from the printed circuit board.
Overcurrent (OC) trip relay contacts are available at terminals
TB2-40
,
TB2-41
and
TB2-42
.
4.5. Adjusting the Overcurrent (OC) Feature
To adjust the overcurrent (OC) feature, follow the instructions below.
1. Run the unit in a normal load configuration and adjust the current trip (CT) adjustment clockwise (CW)
until the unit starts to trip.
2. Then adjust the current trip (CT) adjustment counter-clockwise (CCW) until steady operation starts.
3. Turn the current trip (CT) adjustment counter-clockwise (CCW) another quarter turn.
Overcurrent (OC) trip relay contacts are available at terminals
TB2-40
,
TB2-41
and
TB2-42
.
∇ ∇ ∇
*
*