Time Delays; Load Control Time Delays - Kohler MPAC 1500 Manual

5.9

Time Delays

5.9.1 Time Delays
The factory settings and adjustment ranges for the time
delays are shown in Figure 5-10.
The engine start time delay and transfer time delays can
prevent nuisance transfers caused by brief voltage dips
or surges.
The engine cooldown time delay holds the engine start
contacts closed for a designated time after transfer to
allow the generator set to run without load before
shutting down.
5.9.2

Load Control Time Delays

The pre/post-transfer load control time delays allow
loads to be sequenced on and off prior to and following
Time Delay Description
Engine Start, Source S2
Engine Start, Source S1
Engine Cooldown, Source S2
Engine Cooldown, Source S1
Xfr Pref>Stby
Xfr Stby>Pref
Xfr Off>Stby
Xfr OFF>Pref
Fail to Acquire Pref
Fail to Acquire Stby
In-Phase Xfr Fail (found in the
Set Sources menu)
Load # Disc N>E
Load # Rec N>E
Load # Disc E>N
Load # Rec E>N
Load # Add Source1/Source2
Load # Remove Srce1/Srce2
* The optional external battery module allows extended engine start time delays from 0--60 min.
Figure 5-10 Time Delay Settings
64 Section 5 Setup
Description/Note
Source S2 -- Util/Gen and Gen/Gen modes
Source S1 -- Use for Gen/Gen mode
Source S2 -- Util/Gen and Gen/Gen modes
Source S1 -- Gen/Gen mode
Transfer delay, preferred to standby
Transfer delay, standby to preferred
Time in the OFF position (Preferred to Standby for
programmed transition models only)
Time in the OFF position (Standby to Preferred for
programmed transition models only)
If the preferred source does not reach acceptable
voltage and stabilize within the allowed time, the Fail to
Acquire Preferred Source fault is activated.
If the standby source does not reach acceptable
voltage and stabilize within the allowed time, the Fail to
Acquire Standby Source fault is activated.
For in-phase monitoring: the time allowed for the two
sources to come into synchronization within specified
phase angle before a Fail to Sync fault is activated.
See Section 5.11.
Disconnect load before-transfer to standby source.
Used for time-based and current-based load control.
See Section 5.10.
Reconnect load after-transfer to standby source. Used
for time-based load control. See Section 5.10.
Disconnect load before-transfer to preferred source.
Used for time-based and current-based load control.
See Section 5.10.
Reconnect load after-transfer to preferred source.
Used for time-based load control. See Section 5.10.
For current-based load control. See Section 5.10.2.
For current-based load control. See Section 5.10.2.
transfers. The pre-transfer signals are active only when
both sources are available. The pre-transfer signals
overlap the transfer time delays (Xfr N>E and E>N).
The longer delay determines the time delay before
transfer. Up to nine loads can be controlled with
independent timing sequences for pre- and post-
transfer delays in either direction of transfer.
Current-based load
Current-based load control uses the Load Disconnect,
Load Add Source1/Source2, and Load Remove
Source1/Source2 time delays. See Section 5.10.2 for
more information about the time delays used for
current-based load control.
Proceed to Section 5.10, Load Control, for more
information.
Default Time
3 sec
3 sec
5 sec
2 sec
3 sec
15 min
1 sec
1 sec
1 min
1 min
30 sec
0 sec
0 sec
0 sec
0 sec
0 sec
control is also available.
Adjustment Range
0--6 sec*
0--60 min
0--60 min
0--60 min
0--60 min
0--60 min
0--60 min
0--60 min
0--60 min
TP-6714 4/10