I.L.15.01.T.K.
Page 13
Effective June 2000
remain on the emergency source until the
external contact is opened, when user is
certain that the threat of problems has
passed. If the emergency source fails at
any time when in the Area Protection mode,
the switch will immediately transfer back to
the Normal source if it is Available.
The MP1-E controller allows the Test/Area
protection input to be disabled if the user
would like to prevent unauthorized users
from using the test switch or input contact.
Optional Feature 29 - Manual Return To
Normal – MP1-E Only
A manual operated momentary contact
(normally open) operates in conjunction with
the Manual Return to Normal option to
replace the TDEN timing function. With the
manual mode set, closure of this contact will
prompt an immediate transfer bypassing the
TDEN time delay. This ensures that a re-
transfer occurs only at the discretion of the
operator.
Optional Feature 32 - Time Delay Neutral
Provides a time delay in the transfer switch
neutral position when the load is transferred
in one or both directions. This is to prevent
excessive inrush currents due to out-of-
phase switching of large inductive loads. If
the TDN timer is programmed to 0 seconds,
the transfer switch shall operate as if the
TDN option is disabled. Three optional
modes of Neutral Time Delay are available
as programmable:
(a) TDN(NE) – Time Delay Neutral (from
Normal to Emergency)
(b) TDN(EN) – Time Delay Neutral (from
Emergency to Normal)
(c) TDN(G) – Time Delay Neutral (Both
directions)
8.2 External
Options
There are also external options that may be
installed in a Cutler-Hammer Automatic
Transfer Switch. A brief description is
provided.
Standard Feature 6D – 2 Position Test
Selector Switch (TSS)
Position 1 – “Auto”: The ATS will function
normally, transferring to the emergency
source when normal power is lost.
Position 2 – “Test”: The ATS will simulate
the loss of the normal source. The switch
will transfer to source 2 after the Time Delay
Engine Start, and the TDNE has expired.
The ATS will return to the normal position
when the switch is return to “Auto”.
Option 6G
is identical to the Test Selector
Switch except key operated. Key removable
in “Auto” position.
Standard Feature 6H – 4 Position Test
Selector Switch (FPSS)
Position 1 – “Auto”: The ATS will function
normally, transferring to source 2 when
normal power is lost.
Position 2 – “Test”: The ATS will simulate
the loss of the normal source. The switch
will transfer to source 2 after the Time Delay
Engine Start, and the TDNE has expired.
The ATS will return to the normal position
when the switch is returned to “Auto”.
Position 3 – “Engine Start”: The engine start
contacts will close, giving the genset a start
signal. This position can be used to test the
correct connection of the engine start
terminals, or as a remote start. The
controller with function normally and transfer
to the emergency if normal power is lost.
Position 4 – “Manual”: This will disconnect
the transfer motor, and prevent transfers in
either direction. The ATS can be transferred
only by operating the manual transfer
handle.
Option 6J
is identical to the Four Position
Selector Switch except key operated. Key
removable in “Auto” position.
Optional Feature 12C – Normal
Connected Pilot light.
A green 30mm indication light indicates that
the load is connected to the normal source.
Optional Feature 12D –
Emergency Connected Pilot light.
A red 30mm indication light indicates that
the load is connected to the emergency
source.
