Specifications

June 2007 PIP ELSAP20
Low-Voltage Automatic Transfer Switch
b. Red light to indicate that an automatic transfer switch is connected to the
alternate power source
4.5.2 If specified on the purchaser’s PIP ELSAP20D Data Sheet, auxiliary
contacts, rated 10 amps at 250 VAC, shall be provided to indicate the
following conditions:
a. Automatic transfer switch is connected to the normal source
b. Automatic transfer switch is connected to the alternate source
4.5.3 If specified on the purchaser’s PIP ELSAP20D Data Sheet, a contact, rated
5 amps at 30 VDC, shall be provided for a low-voltage engine start signal.
4.5.4 If specified on the purchaser’s PIP ELSAP20D Data Sheet, a test switch shall
be provided to simulate normal source failure.
4.5.5 If specified on the purchaser’s PIP ELSAP20D Data Sheet, one of the
following capabilities shall be provided to test all indicator lights:
a. Push-to-test indicator lights
b. A push button
4.5.6 If specified on the purchaser’s PIP ELSAP20D Data Sheet, microprocessor
controller(s) shall provide an internal engine exerciser. The controller shall
be capable of programming engine exercise routines. The following
minimum programming functions shall be provided:
a. Enable and disable routine
b. Enable and disable transfer of load during routine
c. Set start time (i.e., time, day, week, and month)
d. Set duration of run period
e. At end of specified duration of engine exercise routine, switch shall
transfer load back to normal and run engine for specified cool down
period (applies only when the engine was exercised under operating
load)
4.6 Enclosures
4.6.1 Main Enclosures
4.6.1.1 The main enclosure shall be constructed in accordance with UL 508.
4.6.1.2 Unless otherwise specified on the purchaser’s PIP ELSAP20D Data
Sheet, enclosures shall be NEMA 1.
4.6.1.3 All components and wiring connections shall be accessible from the
front of enclosure.
4.6.1.4 Enclosures shall have lockable handles with a minimum of two keys
provided.
4.6.1.5 Enclosure openings greater than 0.25 inch (6 mm) in width shall be
provided with screens to prevent the entrance of snakes, rodents, etc.
Screen mesh opening width shall be 0.25 inch (6 mm) maximum.
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