Specifications

PIP ELSSG01
COMPLETE REVISION
Design and Fabrication of Low-Voltage Metal-Enclosed AC Power Circuit Breaker Switchgear October 2004
Page 8 of 14 Process Industry Practices
4.7 Switches
4.7.1 Ammeter and voltmeter switches shall be provided if indicated on the
purchaser’s PIP ELSSG01D Data Sheet.
4.7.2 Ammeter switches shall be the four-position rotary type.
4.7.3 Voltmeter switches shall be the four-position rotary type unless indicated
otherwise on the purchaser’s PIP ELSSG01D Data Sheet.
4.8 Metering
4.8.1 Switchgear metering shall be provided in accordance with the purchaser’s
PIP ELSSG01D Data Sheet.
4.8.2 Communication capabilities shall be provided if indicated on the purchaser’s
PIP ELSSG01D Data Sheet.
4.8.3 All metering and control equipment shall be accessible from the front of the
switchgear.
4.8.4 If analog-type metering is specified on the purchaser’s PIP ELSSG01D Data
Sheet, it shall be of the circular 250-degree-scale switchboard type,
1% accuracy, 4-1/2 inch square, and flush mounted.
4.8.5 Control power for microprocessor-type metering shall be as indicated on the
purchaser’s PIP ELSSG01D Data Sheet.
4.9 Space Heaters
4.9.1 If indicated on the purchaser’s PIP ELSSG01D Data Sheet, space heaters
shall be provided in each vertical section.
4.9.2 An expanded metal cage shall be provided around the heaters to guard
against accidental contact. Caution signs with black engraving on yellow
background shall be provided on each vertical section stating the following:
CAUTION:
SPACE HEATERS MAY BE ENERGIZED INSIDE.
4.9.3 The power supplies to the heaters shall be from the source indicated on the
purchaser’s PIP ELSSG01D Data Sheet.
4.9.4 The heaters shall be rated at 240 volts and shall be sized to provide the
required heat output when operated on a 120-volt system.
4.9.5 If indicated on the purchaser’s PIP ELSSG01D Data Sheet, a panel-type
indicating ammeter shall be provided in each main heater circuit, with
“normal current” range indicated on the ammeter scale.
4.9.6 If indicated on the purchaser’s PIP ELSSG01D Data Sheet, thermostats shall
be provided.
4.9.7 If indicated on the purchaser’s PIP ELSSG01D Data Sheet, a push-to-test
pushbutton shall be installed parallel with the thermostat for testing the
space heaters.