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Diesel Generator Operation Manual SYSTEM OPERATION Operation Part 6 ​Optional Power Transfer Control (PTC) Operation

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Diesel Generator Operation Manual  SYSTEM OPERATION Operation Part 6 

Optional Power Transfer Control (PTC) Operation


5.9   Optional Power Transfer Control (PTC) Operation

The following table describes the function and operation of the PCC3201 with the optional PTC feature enabled. With the PTC feature enabled, the control performs two functions: generator set operation and transfer of load between utility and generator set.

The following table describes how the generator set/PTC operates when the control switch is in the Off, Manual and Auto positions.

Control Switch Position

Result

Off

·       PCC3201/PTC Not   in Auto (1222) warning fault active.

·       Generator set   will not start

·       Loads will not transfer/retransfer

Manual

(see also Table 5-1 for sequence of operatin)

·       PCC3201/PTC Not   in Auto (1222) warning fault active

·       Generator set   can only be started manually via control panel Manual Run/Stop button

·      Load must be   transferred manually (see Figure 4-16)

·       Synchronizing   and load ramping will occur automatically

·       Enforcement of   max parallel time will occur automatically

Auto

(see also Table 5-2 for sequence of operatin)

·       PCC3201/PTC in   auto mode

·       Generator set   will start automatically as required

·      Loads will   transfer/retransfer automatically as required


5.9.1   PCC3201/PTC – Normal Operation Sequences

The following tables show the normal operating sequence of events for each of the four possible running modes (utility power failure, exercise, test or manual run). The sequences are further defined by generator set application type i.e. Open transition, Closed transition-momentary, or Closed transition-soft loading.

The previous Start, Exercise and Stop information (Figure 5-1) also applies/remains the same with the exception of the PTC transfer and re-transfer of load after the generator set or utility voltage/frequency stabilize.

The PCC3201/PTC Exercise Without Load is identical to the standard PCC3201 exercise sequence shown in Figure 5-1. The PCC3201/PTC Exercise With Load is shown in Table 5-3. The default setting is without load. Contact an authorised distributor to change this parameter.


5.9.2   Test Switch

With the PTC feature enabled, the Remote Start input (TB8-4/5) will function as a Test mode switch for the PTC. The PTC Test sequence is identical to the Exercise sequence (with or without load), except that the generator set will continue to run until the Test switch is de-activated. The default is without load. Contact an authorised distributor to change this parameter.


Table 5-1Manual Run


OPEN   TRANSITION

CLOSED TRANSITION –   MOMENTARY

CLOSED TRANSITION – SOFT   LOADING

1

Manual Run switch   activated

Manual Run switch   activated

Manual Run switch   activated

2

Generator set starts

Generator set starts

Generator set starts

3

Warm-up at Idle

Warm-up at Idle

Warm-up at Idle

4

Generator set available

Generator set available

Generator set available

5


Synchronises to Utility

Synchronises to Utility

6

Open Utility CB (Operator)



7

Time      Delay      programmed   transition



8

Close generator set CB   (Operator)

Close generator set CB   (Operator)

Close generator set CB   (Operator)

9


<100msec overlap

Generator set ramp loads

10



Utility unloaded

11


Utility CB opens (Auto by   control)

Open Utility CB (*Operator)

12

GENERATOR   SET SUPPLYING LOAD

GENERATOR   SET SUPPLYING LOAD

GENERATOR   SET SUPPLYING LOAD

13

Open generator set CB   (Operator)



14

Time      Delay      programmed transition

Synchronises to Utility

Synchronises to Utility

15

Close Utility CB   (Operator)

Close Utility CB   (Operator)

Close Utility CB   (Operator)

16


<100msec overlap

Generator set ramp unloads

17



Generator set unloaded

18


Generator set   CB opens (by control)

Open      generator      set     CB   (*Operator)

19

UTILITY SUPPLYING LOAD

UTILITY SUPPLYING LOAD

UTILITY SUPPLYING LOAD

20

Manual      Run     switch     de- activated

Manual Run switch   de-activated

Manual Run switch   de-activated

21

Cool down

Cool down

Cool down

22

Generator set stopped

Generator set stopped

Generator set stopped

* Maximum parallel time is   enforced in Manual mode. Breaker operation will be automatic if maximum   parallel time is exceeded.

Table 5-2Utility Power Fail


OPEN   TRANSITION

CLOSED TRANSITION –   MOMENTARY

CLOSED TRANSITION – SOFT   LOADING

1

Utility failure

Utility failure

Utility failure

2

Time Delay to Start

Time Delay to Start

Time Delay to Start

3

Generator set starts

Generator set starts

Generator set starts

4

Generator set available

Generator set available

Generator set available

5

Time Delay to Transfer

Time Delay to Transfer

Time Delay to Transfer

6

Utility CB opens

Utility CB opens

Utility CB opens

7

Time       Delay      programmed   transition

Time       Delay      programmed   transition

Time       Delay              programmed transition

8

Generator set CB closes

Generator set CB closes

Generator set CB closes

9

GENERATOR   SET SUPPLYING LOAD

GENERATOR   SET SUPPLYING LOAD

GENERATOR   SET SUPPLYING LOAD

10

Utility available

Utility available

Utility available

11

Time Delay retransfer

Time Delay retransfer

Time Delay retransfer

12


Synchronises to Utility

Synchronises   to Utility

13


Utility CB Closes

Utility   CB Closes

14


<100msec overlap

Generator set ramp unloads

15



Generator set unloaded

16

Generator set CB opens

Generator set CB opens

Generator set CB opens

17

Time       Delay      programmed transition



18

Utility CB closes



19

UTILITY   SUPPLYING LOAD

UTILITY   SUPPLYING LOAD

UTILITY   SUPPLYING LOAD

20

Time Delay to   Stop/Cooldown

Time Delay to   Stop/Cooldown

Time Delay to   Stop/Cooldown

21

Generator set stopped

Generator set stopped

Generator set stopped

Table 5-3Exercise with load


OPEN   TRANSITION

CLOSED TRANSITION –   MOMENTARY

CLOSED TRANSITION – SOFT   LOADING

1

Exercise start activated

Exercise start activated

Exercise start activated

2

Time Delay to Start

Time Delay to Start

Time Delay to Start

3

Generator set starts

Generator set starts

Generator set starts

4

Warm-up at Idle

Warm-up at Idle

Warm-up at Idle

5

Generator set available

Generator set available

Generator set available

6

Time Delay to transfer

Time Delay to transfer

Time Delay to transfer

7

Utility CB opens

Synchronises to Utility

Synchronises to Utility

8

Time Delay programmed   transition



9

Generator set CB closes

Generator set CB closes

Generator set CB closes

10


<100msec overlap

Generator set ramp loads

11



Utility unloaded

12


Utility CB opens

Utility CB opens

13

GENERATOR   SET SUPPLYING LOAD

GENERATOR   SET SUPPLYING LOAD

GENERATOR   SET SUPPLYING LOAD

14

Exercise timer expires

Exercise timer expires

Exercise timer expires

15

Time Delay retransfer

Time Delay retransfer

Time Delay retransfer

16

Generator set CB opens

Synchronises to Utility

Synchronises to Utility

17

Time Delay programmed   transition



18

Utility CB closes

Utility CB closes

Utility CB closes

19


<100msec overlap

Generator set ramp unloads

20



Generator set unloaded

21


Generator set CB opens

Generator set CB opens

22

UTILITY   SUPPLYING LOAD

UTILITY   SUPPLYING LOAD

UTILITY   SUPPLYING LOAD

23

Time Delay to   Stop/Cooldown

Time Delay to   Stop/Cooldown

Time Delay to   Stop/Cooldown

24

Generator set stopped

Generator set stopped

Generator set stopped


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