GE Entelli-Switch 250 User Manual download pdf (Page 13)

■

GE Zenith Controls 13

■

Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)

Accessory Definitions

(cont’d)

Notes: - If S2 Frequency is less than S1 Frequency,

display will show a series of (- - - - -…..) symbols.

- If S2 Frequency is greater than S1 Frequency,

display will show a series of (+++++…..) symbols.

- Each (-) or (+) symbol represents 10 electrical

degrees out of phase. A maximum of 18 symbols

(180 electrical degrees) can be monitored.

- The number of (-) or (+) symbols decrease

as the two sources approach synchronism

and increase as the two sources drift out

of synchronism.

- 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.

S5P

Auto / Semi Manual selector

In "Auto" position, retransfer to Source 1 is automatic

after the T timer has timed out. The T time delay is

bypassed if Source 2 fails.

In "Manual", retransfer to Source 1 is upon depression

of BYPASS DELAY button YEN or if Source 2 fails.

S12P

Auto / Manual Selector

In "Auto" position, the Automatic Transfer Switch

functions automatically as specified with the Switch

drawings.

In "Manual" the Automatic Transfer Switch will transfer

to either direction upon depression of Source 1 or

Source 2 transfer buttons.

Should Source 1 fail, the Generator (Source 2), will

automatically start. Once transferred in Manual, the

Switch maintains position selected even if selected

power fails.

S13P

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.

S14

Test / Auto / Source 1 Selector, Door mount

SW1

Auto/Off/Start Engine control selector, Door mount

(Keyed or non-keyed operation available)

SW2

Auto / Off Engine control selector, Door mount

(Keyed or non-keyed operation available)

SW3

Source Priority Selector Switch, Door mount

Allows selection of Source 1 or Source 2 to be the Prime

Source. Transfer Switch will transfer to selected Prime

Source if that Source is available. (Keyed or non-keyed

operation available)

Time Delay (S1) Source 1 Stable Timer. To delay trans-

fer to Source 1 (immediate retransfer on Source 2 fail-

ure). Adjustable 0-60 minutes in 1 second increments.

Standard setting is 30 minutes. Adjust via SET menu

(see page 18)

T3/W3

Elevator Pre-Signal Auxiliary Contacts: Open 0-60

seconds prior to transfer to either direction,

re-closes after transfer.

(S2) Source 2 Stop Delay Timer. Allows Engine to run

unloaded after switch retransfer to Source 1. Adjustable

0-60 minutes in 1 second increments. Standard setting is

5 minutes. Adjust via SET menu (see page 18)

UMD

Universal Motor Load Disconnect Circuit: Auxiliary

Contact opens 0-60 seconds prior to transfer in either

direction, re-closes after transfer. Can be configured by

end user for Pre-transfer, Post-transfer, or both.

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 31 32

Comments to this Manuals

No comments

GE Entelli-Switch 250 User Manual Page 13

Comments to this Manuals

Related products and manuals for Power generators GE Entelli-Switch 250