Views: 9 Author: Site Editor Publish Time: 2018-05-06 Origin: Site
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 |