Std. Features, MSTDG Option Pkg. (cont’d)
EL/P
Event Log: Sequentially Numbered Log of 16 events that track
date, time, reason and action taken System Data: Total Life Transfers (N2P)
Days Powered Up Total Transfers to S2 Total S1 Failures Time S1 available in Hrs
Time S2 available in Hrs. (N1P)
K/P
Frequency Indication for S1 and S2
L
LNP
L1 Indicates Switch in Source 2 position.
L2 Indicates Switch in Source 1 position.
L3 Indicates Source 1 available.
L4 Indicates Source 2 available.
P1
Time Delay Source 2 Start. Adjustable
Adjust via SET menu (see page 18)
Q2
Peak Shave / Remote Load Test: Input for Peak Shave or Remote Load Test. Includes automatic return to Source 1 if Source 2 fails and Source 1 present.
R2E
Under voltage sensing of Source 2 for
R50
In Phase Monitor this feature restricts Live to Live Source Transfers to occur unless both Sources are within 7 electrical degrees or less of each other. (live Source to live Source transfers usually occur during transfer back to Source 1 or during Testing). R50 does not change the operation of the Automatic Transfer Switch in a power failure mode. After all timer functions have elapsed, the CHECKING FOR SOURCE SYNCHRO- NISM will be displayed as well as the direction of transfer
Notes: - If S2 Frequency is less than S1 Frequency, display will show a series of (- - - -
-If S2 Frequency is greater than S1 Frequency, display will show a series of (+++++…..) symbols.
-Each
-The number of
-If S1 and S2 Frequencies are identical, the
display will show a series of alternating symbols (++++…)- - - - which also indicate the
approximate out of phase degrees
In the event that the Sources do not come within 7 electrical degrees of each other within 60 seconds, the unit will display the message: SYNCH CHECKING and will allow the user to BYPASS. If the BYPASS button is pressed, the unit will display the message: WARNING MAY CAUSE DAMAGE TO THE LOAD. Pressing XFR will actually bypass the R50. Since R50 is a passive device, the length of time it takes to reach Synchronism is de- pendent on the frequency difference between the two Sources. Source 1 is usually a Utility and the frequency is not within the control of the consumer. Source 2 needs to be adjusted to create an adequate difference in order for the transfer to happen a timely fashion.
Note: For optimum performance, Source 2 Generator should be adjusted a Maximum of 2 Hertz above or below the Utility frequency, minimum of 0.1 Hertz. (58 to 59.9) or
(60.1 to 62) Hertz. Adjustment of Generator to 60Hertz could cause lengthy transfer delay.
R50 Feature can be turned ON or OFF via CFG Menu (see page 17). Factory Default if OFF.
S13
Transfer Commit. Configured via CFG menu. (see page 17) When this Feature is set to OFF:
The transfer Switch is not committed to transfer unless the outage duration is longer than the timers that precede the transfer to Source 2 position. This assumes that the outage will be an isolated event. When this Feature is set to ON: The transfer Switch is committed to transfer to Source 2 position once the W timer has begun timing, even if Source 1 power returns before the transfer to Source 2. This is to ensure that the transfer takes place, because one outage may be followed by another.
T
Time Delay (S1) Source 1 Stable Timer. To delay trans- fer to Source 1 (immediate retransfer on Source 2 fail- ure). Adjustable
Standard setting is 30 minutes. Adjust via SET menu (see page 18)
U
(S2) Source 2 Stop Delay Timer. Allows Engine to run unloaded after switch retransfer to Source 1. Adjustable
W
Time Delay (S2) Source 2 Stable Timer. To delay trans- fer to Source 2. Adjustable
YEN
Bypass Timers Key utilizing Keypad. When applicable, the system prompts the user to press a button to bypass
(T) or (W) Timers should the user so desires.
■ GE Zenith Controls | ZTG/ZTGD Operation and Maintenance Manual | 11 ■ |
