Generac Power Systems HTS Wn, Owner'S Manual

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2.6.2 DIP SWITCH 2
‹
60/50 Hz - Dip2 - switch 1: Set this switch to ON for a 60Hz •
system. This setting is only used if the communications fail.
Normally it will be overridden by the target frequency setting in
the G/H panel. The Generator and Utility must be within 1Hz of
this nominal frequency for an inphase transfer to take place.
2.6.3 SWITCHES 2 TO 6
‹
These switches no longer have any function.
2.6.4 SWITCHES 7 AND 8
‹
These switches select the communications baud rate, they are for
future development and should currently both be set to off (4800
baud).
Baud Rate
Dip 8 7
4800 0 0
9600 0 1
38400 1 0 (V1.8)
57600 1 1 (V1.8)
2.6.5 SYNCHRONIZATION LIMITS
‹
Synch requirements are:
Generator frequency within 1Hz of nominal •
Voltage within User Programmed limits •
Absolute Voltage difference /- 6V •
Generator/Utility Frequency difference 0.2/- 0.0 Hz •
Phase difference within - 7 / +0 degrees •
(i.e. Generator voltage is earlier than Utility and catching up, this
gives some compensation for the transfer switch closing delay).
2.6.6 VOLTAGE LIMITS
‹
Determination of good Utility is done by the H or G controller
against user programmable limits. If the communication link to the
transfer switch breaks down, the following criteria are used for a
local determination.
Dropout — any phase outside - 70 to +130 % of nominal (not
the average voltage)
Pickup — all phases > +75 % of nominal
2.7 PROGRAMMING
The HTS transfer switch is controlled by the G/H control panel on
the engine generator. The timer, voltage pickup, dropout and exer-
cise settings are programmed into the G/H control panel. Please
refer to the G/H control panel manual for details on programming
the HTS transfer switch controls.
2.8 AUXILIARY CONTACTS
It is possible to add Auxiliary Contacts on the transfer switch to
operate customer accessories, remote advisory lights, or remote
annunciator devices. It is necessary to change the single pole limit
switch to a double pole device. Reconnect 0A, 147 and 148 to like
terminals on the double limit switch. A suitable power source must
be connected to the COMMON (C) terminal (Figure 2.3).
Contact operation is shown in the following chart:
Switch Position
Utility Standby
Common to Normally Open Closed Open
Common to Normally Closed Open Closed
NOTE:
Auxiliary Contacts are rated 10 amps at 125 or 250 volts AC.
DO NOT EXCEED THE RATED VOLTAGE AND CURRENT OF THE
CONTACTS.
Figure 2.3 — Auxiliary Contact Diagram
Section 2 — Installation
HTS “Wn” Type Transfer Switch